diff options
| author | Waldemar Brodkorb <wbx@uclibc-ng.org> | 2016-11-01 22:32:59 +0100 |
|---|---|---|
| committer | Waldemar Brodkorb <wbx@uclibc-ng.org> | 2016-11-01 22:32:59 +0100 |
| commit | 47fd761b81a0c6729d4e833740d050f4e22e7184 (patch) | |
| tree | cea046ee720b3507075d32f2e4960cff775ec97e /target/linux | |
| parent | 21a6e6df534b1921f486c4eac3cb8d01e96743a7 (diff) | |
linux: update to 4.8.6, add realtime patch
Diffstat (limited to 'target/linux')
| -rw-r--r-- | target/linux/config/Config.in.kernel | 6 | ||||
| -rw-r--r-- | target/linux/patches/4.1.35/patch-realtime | 8564 | ||||
| -rw-r--r-- | target/linux/patches/4.8.6/crisv32.patch (renamed from target/linux/patches/4.8.5/crisv32.patch) | 0 | ||||
| -rw-r--r-- | target/linux/patches/4.8.6/crisv32_ethernet_driver.patch (renamed from target/linux/patches/4.8.5/crisv32_ethernet_driver.patch) | 0 | ||||
| -rw-r--r-- | target/linux/patches/4.8.6/initramfs-nosizelimit.patch (renamed from target/linux/patches/4.8.5/initramfs-nosizelimit.patch) | 0 | ||||
| -rw-r--r-- | target/linux/patches/4.8.6/ld-or1k.patch (renamed from target/linux/patches/4.8.5/ld-or1k.patch) | 0 | ||||
| -rw-r--r-- | target/linux/patches/4.8.6/macsonic.patch (renamed from target/linux/patches/4.8.5/macsonic.patch) | 0 | ||||
| -rw-r--r-- | target/linux/patches/4.8.6/patch-realtime | 25908 | ||||
| -rw-r--r-- | target/linux/patches/4.8.6/startup.patch (renamed from target/linux/patches/4.8.5/startup.patch) | 0 | ||||
| -rw-r--r-- | target/linux/patches/4.8.6/vdso2.patch (renamed from target/linux/patches/4.8.5/vdso2.patch) | 0 |
10 files changed, 30937 insertions, 3541 deletions
diff --git a/target/linux/config/Config.in.kernel b/target/linux/config/Config.in.kernel index 393b1628b..ad0e01819 100644 --- a/target/linux/config/Config.in.kernel +++ b/target/linux/config/Config.in.kernel @@ -146,7 +146,8 @@ config ADK_KERNEL_PREEMPT_RTB select ADK_KERNEL_PATCH_REALTIME depends on !ADK_KERNEL_OPROFILE depends on ADK_TARGET_KERNEL_VERSION_4_1 \ - || ADK_TARGET_KERNEL_VERSION_4_4 + || ADK_TARGET_KERNEL_VERSION_4_4 \ + || ADK_TARGET_KERNEL_VERSION_4_8 help Preemptible Kernel (Basic RT) @@ -156,7 +157,8 @@ config ADK_KERNEL_PREEMPT_RT_FULL select ADK_KERNEL_PATCH_REALTIME depends on !ADK_KERNEL_OPROFILE depends on ADK_TARGET_KERNEL_VERSION_4_1 \ - || ADK_TARGET_KERNEL_VERSION_4_4 + || ADK_TARGET_KERNEL_VERSION_4_4 \ + || ADK_TARGET_KERNEL_VERSION_4_8 help Fully Preemptible Kernel (RealTime) https://www.kernel.org/pub/linux/kernel/projects/rt/ diff --git a/target/linux/patches/4.1.35/patch-realtime b/target/linux/patches/4.1.35/patch-realtime index 6ecf019b9..94d6fe355 100644 --- a/target/linux/patches/4.1.35/patch-realtime +++ b/target/linux/patches/4.1.35/patch-realtime @@ -1,6 +1,313 @@ -diff -Nur linux-4.1.26.orig/arch/alpha/mm/fault.c linux-4.1.26/arch/alpha/mm/fault.c ---- linux-4.1.26.orig/arch/alpha/mm/fault.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/alpha/mm/fault.c 2016-06-19 15:30:54.915151887 +0200 +diff --git a/Documentation/hwlat_detector.txt b/Documentation/hwlat_detector.txt +new file mode 100644 +index 000000000000..cb61516483d3 +--- /dev/null ++++ b/Documentation/hwlat_detector.txt +@@ -0,0 +1,64 @@ ++Introduction: ++------------- ++ ++The module hwlat_detector is a special purpose kernel module that is used to ++detect large system latencies induced by the behavior of certain underlying ++hardware or firmware, independent of Linux itself. The code was developed ++originally to detect SMIs (System Management Interrupts) on x86 systems, ++however there is nothing x86 specific about this patchset. It was ++originally written for use by the "RT" patch since the Real Time ++kernel is highly latency sensitive. ++ ++SMIs are usually not serviced by the Linux kernel, which typically does not ++even know that they are occuring. SMIs are instead are set up by BIOS code ++and are serviced by BIOS code, usually for "critical" events such as ++management of thermal sensors and fans. Sometimes though, SMIs are used for ++other tasks and those tasks can spend an inordinate amount of time in the ++handler (sometimes measured in milliseconds). Obviously this is a problem if ++you are trying to keep event service latencies down in the microsecond range. ++ ++The hardware latency detector works by hogging all of the cpus for configurable ++amounts of time (by calling stop_machine()), polling the CPU Time Stamp Counter ++for some period, then looking for gaps in the TSC data. Any gap indicates a ++time when the polling was interrupted and since the machine is stopped and ++interrupts turned off the only thing that could do that would be an SMI. ++ ++Note that the SMI detector should *NEVER* be used in a production environment. ++It is intended to be run manually to determine if the hardware platform has a ++problem with long system firmware service routines. ++ ++Usage: ++------ ++ ++Loading the module hwlat_detector passing the parameter "enabled=1" (or by ++setting the "enable" entry in "hwlat_detector" debugfs toggled on) is the only ++step required to start the hwlat_detector. It is possible to redefine the ++threshold in microseconds (us) above which latency spikes will be taken ++into account (parameter "threshold="). ++ ++Example: ++ ++ # modprobe hwlat_detector enabled=1 threshold=100 ++ ++After the module is loaded, it creates a directory named "hwlat_detector" under ++the debugfs mountpoint, "/debug/hwlat_detector" for this text. It is necessary ++to have debugfs mounted, which might be on /sys/debug on your system. ++ ++The /debug/hwlat_detector interface contains the following files: ++ ++count - number of latency spikes observed since last reset ++enable - a global enable/disable toggle (0/1), resets count ++max - maximum hardware latency actually observed (usecs) ++sample - a pipe from which to read current raw sample data ++ in the format <timestamp> <latency observed usecs> ++ (can be opened O_NONBLOCK for a single sample) ++threshold - minimum latency value to be considered (usecs) ++width - time period to sample with CPUs held (usecs) ++ must be less than the total window size (enforced) ++window - total period of sampling, width being inside (usecs) ++ ++By default we will set width to 500,000 and window to 1,000,000, meaning that ++we will sample every 1,000,000 usecs (1s) for 500,000 usecs (0.5s). If we ++observe any latencies that exceed the threshold (initially 100 usecs), ++then we write to a global sample ring buffer of 8K samples, which is ++consumed by reading from the "sample" (pipe) debugfs file interface. +diff --git a/Documentation/sysrq.txt b/Documentation/sysrq.txt +index 0e307c94809a..6964d0f80ae7 100644 +--- a/Documentation/sysrq.txt ++++ b/Documentation/sysrq.txt +@@ -59,10 +59,17 @@ On PowerPC - Press 'ALT - Print Screen (or F13) - <command key>, + On other - If you know of the key combos for other architectures, please + let me know so I can add them to this section. + +-On all - write a character to /proc/sysrq-trigger. e.g.: +- ++On all - write a character to /proc/sysrq-trigger, e.g.: + echo t > /proc/sysrq-trigger + ++On all - Enable network SysRq by writing a cookie to icmp_echo_sysrq, e.g. ++ echo 0x01020304 >/proc/sys/net/ipv4/icmp_echo_sysrq ++ Send an ICMP echo request with this pattern plus the particular ++ SysRq command key. Example: ++ # ping -c1 -s57 -p0102030468 ++ will trigger the SysRq-H (help) command. ++ ++ + * What are the 'command' keys? + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + 'b' - Will immediately reboot the system without syncing or unmounting +diff --git a/Documentation/trace/histograms.txt b/Documentation/trace/histograms.txt +new file mode 100644 +index 000000000000..6f2aeabf7faa +--- /dev/null ++++ b/Documentation/trace/histograms.txt +@@ -0,0 +1,186 @@ ++ Using the Linux Kernel Latency Histograms ++ ++ ++This document gives a short explanation how to enable, configure and use ++latency histograms. Latency histograms are primarily relevant in the ++context of real-time enabled kernels (CONFIG_PREEMPT/CONFIG_PREEMPT_RT) ++and are used in the quality management of the Linux real-time ++capabilities. ++ ++ ++* Purpose of latency histograms ++ ++A latency histogram continuously accumulates the frequencies of latency ++data. There are two types of histograms ++- potential sources of latencies ++- effective latencies ++ ++ ++* Potential sources of latencies ++ ++Potential sources of latencies are code segments where interrupts, ++preemption or both are disabled (aka critical sections). To create ++histograms of potential sources of latency, the kernel stores the time ++stamp at the start of a critical section, determines the time elapsed ++when the end of the section is reached, and increments the frequency ++counter of that latency value - irrespective of whether any concurrently ++running process is affected by latency or not. ++- Configuration items (in the Kernel hacking/Tracers submenu) ++ CONFIG_INTERRUPT_OFF_LATENCY ++ CONFIG_PREEMPT_OFF_LATENCY ++ ++ ++* Effective latencies ++ ++Effective latencies are actually occuring during wakeup of a process. To ++determine effective latencies, the kernel stores the time stamp when a ++process is scheduled to be woken up, and determines the duration of the ++wakeup time shortly before control is passed over to this process. Note ++that the apparent latency in user space may be somewhat longer, since the ++process may be interrupted after control is passed over to it but before ++the execution in user space takes place. Simply measuring the interval ++between enqueuing and wakeup may also not appropriate in cases when a ++process is scheduled as a result of a timer expiration. The timer may have ++missed its deadline, e.g. due to disabled interrupts, but this latency ++would not be registered. Therefore, the offsets of missed timers are ++recorded in a separate histogram. If both wakeup latency and missed timer ++offsets are configured and enabled, a third histogram may be enabled that ++records the overall latency as a sum of the timer latency, if any, and the ++wakeup latency. This histogram is called "timerandwakeup". ++- Configuration items (in the Kernel hacking/Tracers submenu) ++ CONFIG_WAKEUP_LATENCY ++ CONFIG_MISSED_TIMER_OFSETS ++ ++ ++* Usage ++ ++The interface to the administration of the latency histograms is located ++in the debugfs file system. To mount it, either enter ++ ++mount -t sysfs nodev /sys ++mount -t debugfs nodev /sys/kernel/debug ++ ++from shell command line level, or add ++ ++nodev /sys sysfs defaults 0 0 ++nodev /sys/kernel/debug debugfs defaults 0 0 ++ ++to the file /etc/fstab. All latency histogram related files are then ++available in the directory /sys/kernel/debug/tracing/latency_hist. A ++particular histogram type is enabled by writing non-zero to the related ++variable in the /sys/kernel/debug/tracing/latency_hist/enable directory. ++Select "preemptirqsoff" for the histograms of potential sources of ++latencies and "wakeup" for histograms of effective latencies etc. The ++histogram data - one per CPU - are available in the files ++ ++/sys/kernel/debug/tracing/latency_hist/preemptoff/CPUx ++/sys/kernel/debug/tracing/latency_hist/irqsoff/CPUx ++/sys/kernel/debug/tracing/latency_hist/preemptirqsoff/CPUx ++/sys/kernel/debug/tracing/latency_hist/wakeup/CPUx ++/sys/kernel/debug/tracing/latency_hist/wakeup/sharedprio/CPUx ++/sys/kernel/debug/tracing/latency_hist/missed_timer_offsets/CPUx ++/sys/kernel/debug/tracing/latency_hist/timerandwakeup/CPUx ++ ++The histograms are reset by writing non-zero to the file "reset" in a ++particular latency directory. To reset all latency data, use ++ ++#!/bin/sh ++ ++TRACINGDIR=/sys/kernel/debug/tracing ++HISTDIR=$TRACINGDIR/latency_hist ++ ++if test -d $HISTDIR ++then ++ cd $HISTDIR ++ for i in `find . | grep /reset$` ++ do ++ echo 1 >$i ++ done ++fi ++ ++ ++* Data format ++ ++Latency data are stored with a resolution of one microsecond. The ++maximum latency is 10,240 microseconds. The data are only valid, if the ++overflow register is empty. Every output line contains the latency in ++microseconds in the first row and the number of samples in the second ++row. To display only lines with a positive latency count, use, for ++example, ++ ++grep -v " 0$" /sys/kernel/debug/tracing/latency_hist/preemptoff/CPU0 ++ ++#Minimum latency: 0 microseconds. ++#Average latency: 0 microseconds. ++#Maximum latency: 25 microseconds. ++#Total samples: 3104770694 ++#There are 0 samples greater or equal than 10240 microseconds ++#usecs samples ++ 0 2984486876 ++ 1 49843506 ++ 2 58219047 ++ 3 5348126 ++ 4 2187960 ++ 5 3388262 ++ 6 959289 ++ 7 208294 ++ 8 40420 ++ 9 4485 ++ 10 14918 ++ 11 18340 ++ 12 25052 ++ 13 19455 ++ 14 5602 ++ 15 969 ++ 16 47 ++ 17 18 ++ 18 14 ++ 19 1 ++ 20 3 ++ 21 2 ++ 22 5 ++ 23 2 ++ 25 1 ++ ++ ++* Wakeup latency of a selected process ++ ++To only collect wakeup latency data of a particular process, write the ++PID of the requested process to ++ ++/sys/kernel/debug/tracing/latency_hist/wakeup/pid ++ ++PIDs are not considered, if this variable is set to 0. ++ ++ ++* Details of the process with the highest wakeup latency so far ++ ++Selected data of the process that suffered from the highest wakeup ++latency that occurred in a particular CPU are available in the file ++ ++/sys/kernel/debug/tracing/latency_hist/wakeup/max_latency-CPUx. ++ ++In addition, other relevant system data at the time when the ++latency occurred are given. ++ ++The format of the data is (all in one line): ++<PID> <Priority> <Latency> (<Timeroffset>) <Command> \ ++<- <PID> <Priority> <Command> <Timestamp> ++ ++The value of <Timeroffset> is only relevant in the combined timer ++and wakeup latency recording. In the wakeup recording, it is ++always 0, in the missed_timer_offsets recording, it is the same ++as <Latency>. ++ ++When retrospectively searching for the origin of a latency and ++tracing was not enabled, it may be helpful to know the name and ++some basic data of the task that (finally) was switching to the ++late real-tlme task. In addition to the victim's data, also the ++data of the possible culprit are therefore displayed after the ++"<-" symbol. ++ ++Finally, the timestamp of the time when the latency occurred ++in <seconds>.<microseconds> after the most recent system boot ++is provided. ++ ++These data are also reset when the wakeup histogram is reset. +diff --git a/arch/Kconfig b/arch/Kconfig +index a65eafb24997..78d3ed24484a 100644 +--- a/arch/Kconfig ++++ b/arch/Kconfig +@@ -6,6 +6,7 @@ config OPROFILE + tristate "OProfile system profiling" + depends on PROFILING + depends on HAVE_OPROFILE ++ depends on !PREEMPT_RT_FULL + select RING_BUFFER + select RING_BUFFER_ALLOW_SWAP + help +@@ -49,6 +50,7 @@ config KPROBES + config JUMP_LABEL + bool "Optimize very unlikely/likely branches" + depends on HAVE_ARCH_JUMP_LABEL ++ depends on (!INTERRUPT_OFF_HIST && !PREEMPT_OFF_HIST && !WAKEUP_LATENCY_HIST && !MISSED_TIMER_OFFSETS_HIST) + help + This option enables a transparent branch optimization that + makes certain almost-always-true or almost-always-false branch +diff --git a/arch/alpha/mm/fault.c b/arch/alpha/mm/fault.c +index 9d0ac091a52a..4a905bd667e2 100644 +--- a/arch/alpha/mm/fault.c ++++ b/arch/alpha/mm/fault.c @@ -23,8 +23,7 @@ #include <linux/smp.h> #include <linux/interrupt.h> @@ -11,7 +318,7 @@ diff -Nur linux-4.1.26.orig/arch/alpha/mm/fault.c linux-4.1.26/arch/alpha/mm/fau extern void die_if_kernel(char *,struct pt_regs *,long, unsigned long *); -@@ -107,7 +106,7 @@ +@@ -107,7 +106,7 @@ do_page_fault(unsigned long address, unsigned long mmcsr, /* If we're in an interrupt context, or have no user context, we must not take the fault. */ @@ -20,10 +327,11 @@ diff -Nur linux-4.1.26.orig/arch/alpha/mm/fault.c linux-4.1.26/arch/alpha/mm/fau goto no_context; #ifdef CONFIG_ALPHA_LARGE_VMALLOC -diff -Nur linux-4.1.26.orig/arch/arc/include/asm/futex.h linux-4.1.26/arch/arc/include/asm/futex.h ---- linux-4.1.26.orig/arch/arc/include/asm/futex.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/arc/include/asm/futex.h 2016-06-19 15:30:54.915151887 +0200 -@@ -53,7 +53,7 @@ +diff --git a/arch/arc/include/asm/futex.h b/arch/arc/include/asm/futex.h +index 4dc64ddebece..05b5aaf5b0f9 100644 +--- a/arch/arc/include/asm/futex.h ++++ b/arch/arc/include/asm/futex.h +@@ -53,7 +53,7 @@ static inline int futex_atomic_op_inuser(int encoded_op, u32 __user *uaddr) if (!access_ok(VERIFY_WRITE, uaddr, sizeof(int))) return -EFAULT; @@ -32,7 +340,7 @@ diff -Nur linux-4.1.26.orig/arch/arc/include/asm/futex.h linux-4.1.26/arch/arc/i switch (op) { case FUTEX_OP_SET: -@@ -75,7 +75,7 @@ +@@ -75,7 +75,7 @@ static inline int futex_atomic_op_inuser(int encoded_op, u32 __user *uaddr) ret = -ENOSYS; } @@ -41,7 +349,7 @@ diff -Nur linux-4.1.26.orig/arch/arc/include/asm/futex.h linux-4.1.26/arch/arc/i if (!ret) { switch (cmp) { -@@ -104,7 +104,7 @@ +@@ -104,7 +104,7 @@ static inline int futex_atomic_op_inuser(int encoded_op, u32 __user *uaddr) return ret; } @@ -50,7 +358,7 @@ diff -Nur linux-4.1.26.orig/arch/arc/include/asm/futex.h linux-4.1.26/arch/arc/i * Notes: * -Best-Effort: Exchg happens only if compare succeeds. * If compare fails, returns; leaving retry/looping to upper layers -@@ -121,7 +121,7 @@ +@@ -121,7 +121,7 @@ futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr, u32 oldval, if (!access_ok(VERIFY_WRITE, uaddr, sizeof(int))) return -EFAULT; @@ -59,7 +367,7 @@ diff -Nur linux-4.1.26.orig/arch/arc/include/asm/futex.h linux-4.1.26/arch/arc/i /* TBD : can use llock/scond */ __asm__ __volatile__( -@@ -142,7 +142,7 @@ +@@ -142,7 +142,7 @@ futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr, u32 oldval, : "r"(oldval), "r"(newval), "r"(uaddr), "ir"(-EFAULT) : "cc", "memory"); @@ -68,10 +376,11 @@ diff -Nur linux-4.1.26.orig/arch/arc/include/asm/futex.h linux-4.1.26/arch/arc/i *uval = val; return val; -diff -Nur linux-4.1.26.orig/arch/arc/mm/fault.c linux-4.1.26/arch/arc/mm/fault.c ---- linux-4.1.26.orig/arch/arc/mm/fault.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/arc/mm/fault.c 2016-06-19 15:30:54.915151887 +0200 -@@ -86,7 +86,7 @@ +diff --git a/arch/arc/mm/fault.c b/arch/arc/mm/fault.c +index 6a2e006cbcce..d948e4e9d89c 100644 +--- a/arch/arc/mm/fault.c ++++ b/arch/arc/mm/fault.c +@@ -86,7 +86,7 @@ void do_page_fault(unsigned long address, struct pt_regs *regs) * If we're in an interrupt or have no user * context, we must not take the fault.. */ @@ -80,10 +389,32 @@ diff -Nur linux-4.1.26.orig/arch/arc/mm/fault.c linux-4.1.26/arch/arc/mm/fault.c goto no_context; if (user_mode(regs)) -diff -Nur linux-4.1.26.orig/arch/arm/include/asm/cmpxchg.h linux-4.1.26/arch/arm/include/asm/cmpxchg.h ---- linux-4.1.26.orig/arch/arm/include/asm/cmpxchg.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/arm/include/asm/cmpxchg.h 2016-06-19 15:30:54.919152041 +0200 -@@ -129,6 +129,8 @@ +diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig +index 19f4cc634b0e..e16a259177d4 100644 +--- a/arch/arm/Kconfig ++++ b/arch/arm/Kconfig +@@ -31,7 +31,7 @@ config ARM + select HARDIRQS_SW_RESEND + select HAVE_ARCH_AUDITSYSCALL if (AEABI && !OABI_COMPAT) + select HAVE_ARCH_BITREVERSE if (CPU_32v7M || CPU_32v7) && !CPU_32v6 +- select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL ++ select HAVE_ARCH_JUMP_LABEL if (!XIP_KERNEL && !PREEMPT_RT_BASE) + select HAVE_ARCH_KGDB + select HAVE_ARCH_SECCOMP_FILTER if (AEABI && !OABI_COMPAT) + select HAVE_ARCH_TRACEHOOK +@@ -66,6 +66,7 @@ config ARM + select HAVE_PERF_EVENTS + select HAVE_PERF_REGS + select HAVE_PERF_USER_STACK_DUMP ++ select HAVE_PREEMPT_LAZY + select HAVE_RCU_TABLE_FREE if (SMP && ARM_LPAE) + select HAVE_REGS_AND_STACK_ACCESS_API + select HAVE_SYSCALL_TRACEPOINTS +diff --git a/arch/arm/include/asm/cmpxchg.h b/arch/arm/include/asm/cmpxchg.h +index abb2c3769b01..2386e9745ba4 100644 +--- a/arch/arm/include/asm/cmpxchg.h ++++ b/arch/arm/include/asm/cmpxchg.h +@@ -129,6 +129,8 @@ static inline unsigned long __xchg(unsigned long x, volatile void *ptr, int size #else /* min ARCH >= ARMv6 */ @@ -92,10 +423,11 @@ diff -Nur linux-4.1.26.orig/arch/arm/include/asm/cmpxchg.h linux-4.1.26/arch/arm extern void __bad_cmpxchg(volatile void *ptr, int size); /* -diff -Nur linux-4.1.26.orig/arch/arm/include/asm/futex.h linux-4.1.26/arch/arm/include/asm/futex.h ---- linux-4.1.26.orig/arch/arm/include/asm/futex.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/arm/include/asm/futex.h 2016-06-19 15:30:54.919152041 +0200 -@@ -93,6 +93,7 @@ +diff --git a/arch/arm/include/asm/futex.h b/arch/arm/include/asm/futex.h +index 4e78065a16aa..5eed82809d82 100644 +--- a/arch/arm/include/asm/futex.h ++++ b/arch/arm/include/asm/futex.h +@@ -93,6 +93,7 @@ futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr, if (!access_ok(VERIFY_WRITE, uaddr, sizeof(u32))) return -EFAULT; @@ -103,7 +435,7 @@ diff -Nur linux-4.1.26.orig/arch/arm/include/asm/futex.h linux-4.1.26/arch/arm/i __asm__ __volatile__("@futex_atomic_cmpxchg_inatomic\n" "1: " TUSER(ldr) " %1, [%4]\n" " teq %1, %2\n" -@@ -104,6 +105,8 @@ +@@ -104,6 +105,8 @@ futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr, : "cc", "memory"); *uval = val; @@ -112,7 +444,7 @@ diff -Nur linux-4.1.26.orig/arch/arm/include/asm/futex.h linux-4.1.26/arch/arm/i return ret; } -@@ -124,7 +127,10 @@ +@@ -124,7 +127,10 @@ futex_atomic_op_inuser (int encoded_op, u32 __user *uaddr) if (!access_ok(VERIFY_WRITE, uaddr, sizeof(u32))) return -EFAULT; @@ -124,7 +456,7 @@ diff -Nur linux-4.1.26.orig/arch/arm/include/asm/futex.h linux-4.1.26/arch/arm/i switch (op) { case FUTEX_OP_SET: -@@ -146,7 +152,10 @@ +@@ -146,7 +152,10 @@ futex_atomic_op_inuser (int encoded_op, u32 __user *uaddr) ret = -ENOSYS; } @@ -136,9 +468,10 @@ diff -Nur linux-4.1.26.orig/arch/arm/include/asm/futex.h linux-4.1.26/arch/arm/i if (!ret) { switch (cmp) { -diff -Nur linux-4.1.26.orig/arch/arm/include/asm/switch_to.h linux-4.1.26/arch/arm/include/asm/switch_to.h ---- linux-4.1.26.orig/arch/arm/include/asm/switch_to.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/arm/include/asm/switch_to.h 2016-06-19 15:30:54.919152041 +0200 +diff --git a/arch/arm/include/asm/switch_to.h b/arch/arm/include/asm/switch_to.h +index c99e259469f7..f3e3d800c407 100644 +--- a/arch/arm/include/asm/switch_to.h ++++ b/arch/arm/include/asm/switch_to.h @@ -3,6 +3,13 @@ #include <linux/thread_info.h> @@ -153,7 +486,7 @@ diff -Nur linux-4.1.26.orig/arch/arm/include/asm/switch_to.h linux-4.1.26/arch/a /* * For v7 SMP cores running a preemptible kernel we may be pre-empted * during a TLB maintenance operation, so execute an inner-shareable dsb -@@ -22,6 +29,7 @@ +@@ -22,6 +29,7 @@ extern struct task_struct *__switch_to(struct task_struct *, struct thread_info #define switch_to(prev,next,last) \ do { \ @@ -161,10 +494,11 @@ diff -Nur linux-4.1.26.orig/arch/arm/include/asm/switch_to.h linux-4.1.26/arch/a last = __switch_to(prev,task_thread_info(prev), task_thread_info(next)); \ } while (0) -diff -Nur linux-4.1.26.orig/arch/arm/include/asm/thread_info.h linux-4.1.26/arch/arm/include/asm/thread_info.h ---- linux-4.1.26.orig/arch/arm/include/asm/thread_info.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/arm/include/asm/thread_info.h 2016-06-19 15:30:54.919152041 +0200 -@@ -50,6 +50,7 @@ +diff --git a/arch/arm/include/asm/thread_info.h b/arch/arm/include/asm/thread_info.h +index bd32eded3e50..b5a616376f60 100644 +--- a/arch/arm/include/asm/thread_info.h ++++ b/arch/arm/include/asm/thread_info.h +@@ -50,6 +50,7 @@ struct cpu_context_save { struct thread_info { unsigned long flags; /* low level flags */ int preempt_count; /* 0 => preemptable, <0 => bug */ @@ -172,7 +506,7 @@ diff -Nur linux-4.1.26.orig/arch/arm/include/asm/thread_info.h linux-4.1.26/arch mm_segment_t addr_limit; /* address limit */ struct task_struct *task; /* main task structure */ __u32 cpu; /* cpu */ -@@ -147,6 +148,7 @@ +@@ -147,6 +148,7 @@ extern int vfp_restore_user_hwstate(struct user_vfp __user *, #define TIF_SIGPENDING 0 #define TIF_NEED_RESCHED 1 #define TIF_NOTIFY_RESUME 2 /* callback before returning to user */ @@ -180,7 +514,7 @@ diff -Nur linux-4.1.26.orig/arch/arm/include/asm/thread_info.h linux-4.1.26/arch #define TIF_UPROBE 7 #define TIF_SYSCALL_TRACE 8 #define TIF_SYSCALL_AUDIT 9 -@@ -160,6 +162,7 @@ +@@ -160,6 +162,7 @@ extern int vfp_restore_user_hwstate(struct user_vfp __user *, #define _TIF_SIGPENDING (1 << TIF_SIGPENDING) #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) #define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME) @@ -188,30 +522,11 @@ diff -Nur linux-4.1.26.orig/arch/arm/include/asm/thread_info.h linux-4.1.26/arch #define _TIF_UPROBE (1 << TIF_UPROBE) #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) #define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT) -diff -Nur linux-4.1.26.orig/arch/arm/Kconfig linux-4.1.26/arch/arm/Kconfig ---- linux-4.1.26.orig/arch/arm/Kconfig 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/arm/Kconfig 2016-06-19 15:30:54.919152041 +0200 -@@ -31,7 +31,7 @@ - select HARDIRQS_SW_RESEND - select HAVE_ARCH_AUDITSYSCALL if (AEABI && !OABI_COMPAT) - select HAVE_ARCH_BITREVERSE if (CPU_32v7M || CPU_32v7) && !CPU_32v6 -- select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL -+ select HAVE_ARCH_JUMP_LABEL if (!XIP_KERNEL && !PREEMPT_RT_BASE) - select HAVE_ARCH_KGDB - select HAVE_ARCH_SECCOMP_FILTER if (AEABI && !OABI_COMPAT) - select HAVE_ARCH_TRACEHOOK -@@ -66,6 +66,7 @@ - select HAVE_PERF_EVENTS - select HAVE_PERF_REGS - select HAVE_PERF_USER_STACK_DUMP -+ select HAVE_PREEMPT_LAZY - select HAVE_RCU_TABLE_FREE if (SMP && ARM_LPAE) - select HAVE_REGS_AND_STACK_ACCESS_API - select HAVE_SYSCALL_TRACEPOINTS -diff -Nur linux-4.1.26.orig/arch/arm/kernel/asm-offsets.c linux-4.1.26/arch/arm/kernel/asm-offsets.c ---- linux-4.1.26.orig/arch/arm/kernel/asm-offsets.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/arm/kernel/asm-offsets.c 2016-06-19 15:30:54.919152041 +0200 -@@ -65,6 +65,7 @@ +diff --git a/arch/arm/kernel/asm-offsets.c b/arch/arm/kernel/asm-offsets.c +index 871b8267d211..4dbe70de7318 100644 +--- a/arch/arm/kernel/asm-offsets.c ++++ b/arch/arm/kernel/asm-offsets.c +@@ -65,6 +65,7 @@ int main(void) BLANK(); DEFINE(TI_FLAGS, offsetof(struct thread_info, flags)); DEFINE(TI_PREEMPT, offsetof(struct thread_info, preempt_count)); @@ -219,10 +534,11 @@ diff -Nur linux-4.1.26.orig/arch/arm/kernel/asm-offsets.c linux-4.1.26/arch/arm/ DEFINE(TI_ADDR_LIMIT, offsetof(struct thread_info, addr_limit)); DEFINE(TI_TASK, offsetof(struct thread_info, task)); DEFINE(TI_CPU, offsetof(struct thread_info, cpu)); -diff -Nur linux-4.1.26.orig/arch/arm/kernel/entry-armv.S linux-4.1.26/arch/arm/kernel/entry-armv.S ---- linux-4.1.26.orig/arch/arm/kernel/entry-armv.S 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/arm/kernel/entry-armv.S 2016-06-19 15:30:54.919152041 +0200 -@@ -208,11 +208,18 @@ +diff --git a/arch/arm/kernel/entry-armv.S b/arch/arm/kernel/entry-armv.S +index 570306c49406..797a13d959b7 100644 +--- a/arch/arm/kernel/entry-armv.S ++++ b/arch/arm/kernel/entry-armv.S +@@ -208,11 +208,18 @@ __irq_svc: #ifdef CONFIG_PREEMPT get_thread_info tsk ldr r8, [tsk, #TI_PREEMPT] @ get preempt count @@ -243,19 +559,27 @@ diff -Nur linux-4.1.26.orig/arch/arm/kernel/entry-armv.S linux-4.1.26/arch/arm/k #endif svc_exit r5, irq = 1 @ return from exception -@@ -227,6 +234,8 @@ +@@ -227,8 +234,14 @@ svc_preempt: 1: bl preempt_schedule_irq @ irq en/disable is done inside ldr r0, [tsk, #TI_FLAGS] @ get new tasks TI_FLAGS tst r0, #_TIF_NEED_RESCHED + bne 1b + tst r0, #_TIF_NEED_RESCHED_LAZY reteq r8 @ go again - b 1b +- b 1b ++ ldr r0, [tsk, #TI_PREEMPT_LAZY] @ get preempt lazy count ++ teq r0, #0 @ if preempt lazy count != 0 ++ beq 1b ++ ret r8 @ go again ++ #endif -diff -Nur linux-4.1.26.orig/arch/arm/kernel/process.c linux-4.1.26/arch/arm/kernel/process.c ---- linux-4.1.26.orig/arch/arm/kernel/process.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/arm/kernel/process.c 2016-06-19 15:30:54.919152041 +0200 -@@ -290,6 +290,30 @@ + + __und_fault: +diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c +index f192a2a41719..649247ac00e6 100644 +--- a/arch/arm/kernel/process.c ++++ b/arch/arm/kernel/process.c +@@ -290,6 +290,30 @@ unsigned long arch_randomize_brk(struct mm_struct *mm) } #ifdef CONFIG_MMU @@ -286,10 +610,11 @@ diff -Nur linux-4.1.26.orig/arch/arm/kernel/process.c linux-4.1.26/arch/arm/kern #ifdef CONFIG_KUSER_HELPERS /* * The vectors page is always readable from user space for the -diff -Nur linux-4.1.26.orig/arch/arm/kernel/signal.c linux-4.1.26/arch/arm/kernel/signal.c ---- linux-4.1.26.orig/arch/arm/kernel/signal.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/arm/kernel/signal.c 2016-06-19 15:30:54.919152041 +0200 -@@ -568,7 +568,8 @@ +diff --git a/arch/arm/kernel/signal.c b/arch/arm/kernel/signal.c +index 586eef26203d..25bd12ef0b36 100644 +--- a/arch/arm/kernel/signal.c ++++ b/arch/arm/kernel/signal.c +@@ -568,7 +568,8 @@ asmlinkage int do_work_pending(struct pt_regs *regs, unsigned int thread_flags, int syscall) { do { @@ -299,10 +624,11 @@ diff -Nur linux-4.1.26.orig/arch/arm/kernel/signal.c linux-4.1.26/arch/arm/kerne schedule(); } else { if (unlikely(!user_mode(regs))) -diff -Nur linux-4.1.26.orig/arch/arm/kernel/smp.c linux-4.1.26/arch/arm/kernel/smp.c ---- linux-4.1.26.orig/arch/arm/kernel/smp.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/arm/kernel/smp.c 2016-06-19 15:30:54.919152041 +0200 -@@ -213,8 +213,6 @@ +diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c +index f11d82527076..e561aef093c7 100644 +--- a/arch/arm/kernel/smp.c ++++ b/arch/arm/kernel/smp.c +@@ -213,8 +213,6 @@ int __cpu_disable(void) flush_cache_louis(); local_flush_tlb_all(); @@ -311,7 +637,7 @@ diff -Nur linux-4.1.26.orig/arch/arm/kernel/smp.c linux-4.1.26/arch/arm/kernel/s return 0; } -@@ -230,6 +228,9 @@ +@@ -230,6 +228,9 @@ void __cpu_die(unsigned int cpu) pr_err("CPU%u: cpu didn't die\n", cpu); return; } @@ -321,10 +647,11 @@ diff -Nur linux-4.1.26.orig/arch/arm/kernel/smp.c linux-4.1.26/arch/arm/kernel/s pr_notice("CPU%u: shutdown\n", cpu); /* -diff -Nur linux-4.1.26.orig/arch/arm/kernel/unwind.c linux-4.1.26/arch/arm/kernel/unwind.c ---- linux-4.1.26.orig/arch/arm/kernel/unwind.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/arm/kernel/unwind.c 2016-06-19 15:30:54.919152041 +0200 -@@ -93,7 +93,7 @@ +diff --git a/arch/arm/kernel/unwind.c b/arch/arm/kernel/unwind.c +index 0bee233fef9a..314cfb232a63 100644 +--- a/arch/arm/kernel/unwind.c ++++ b/arch/arm/kernel/unwind.c +@@ -93,7 +93,7 @@ extern const struct unwind_idx __start_unwind_idx[]; static const struct unwind_idx *__origin_unwind_idx; extern const struct unwind_idx __stop_unwind_idx[]; @@ -333,7 +660,7 @@ diff -Nur linux-4.1.26.orig/arch/arm/kernel/unwind.c linux-4.1.26/arch/arm/kerne static LIST_HEAD(unwind_tables); /* Convert a prel31 symbol to an absolute address */ -@@ -201,7 +201,7 @@ +@@ -201,7 +201,7 @@ static const struct unwind_idx *unwind_find_idx(unsigned long addr) /* module unwind tables */ struct unwind_table *table; @@ -342,7 +669,7 @@ diff -Nur linux-4.1.26.orig/arch/arm/kernel/unwind.c linux-4.1.26/arch/arm/kerne list_for_each_entry(table, &unwind_tables, list) { if (addr >= table->begin_addr && addr < table->end_addr) { -@@ -213,7 +213,7 @@ +@@ -213,7 +213,7 @@ static const struct unwind_idx *unwind_find_idx(unsigned long addr) break; } } @@ -351,7 +678,7 @@ diff -Nur linux-4.1.26.orig/arch/arm/kernel/unwind.c linux-4.1.26/arch/arm/kerne } pr_debug("%s: idx = %p\n", __func__, idx); -@@ -529,9 +529,9 @@ +@@ -529,9 +529,9 @@ struct unwind_table *unwind_table_add(unsigned long start, unsigned long size, tab->begin_addr = text_addr; tab->end_addr = text_addr + text_size; @@ -363,7 +690,7 @@ diff -Nur linux-4.1.26.orig/arch/arm/kernel/unwind.c linux-4.1.26/arch/arm/kerne return tab; } -@@ -543,9 +543,9 @@ +@@ -543,9 +543,9 @@ void unwind_table_del(struct unwind_table *tab) if (!tab) return; @@ -375,10 +702,11 @@ diff -Nur linux-4.1.26.orig/arch/arm/kernel/unwind.c linux-4.1.26/arch/arm/kerne kfree(tab); } -diff -Nur linux-4.1.26.orig/arch/arm/kvm/arm.c linux-4.1.26/arch/arm/kvm/arm.c ---- linux-4.1.26.orig/arch/arm/kvm/arm.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/arm/kvm/arm.c 2016-06-19 15:30:54.919152041 +0200 -@@ -474,9 +474,9 @@ +diff --git a/arch/arm/kvm/arm.c b/arch/arm/kvm/arm.c +index 87b2663a5564..ce5e58d76cf9 100644 +--- a/arch/arm/kvm/arm.c ++++ b/arch/arm/kvm/arm.c +@@ -473,9 +473,9 @@ bool kvm_arch_intc_initialized(struct kvm *kvm) static void vcpu_pause(struct kvm_vcpu *vcpu) { @@ -390,10 +718,11 @@ diff -Nur linux-4.1.26.orig/arch/arm/kvm/arm.c linux-4.1.26/arch/arm/kvm/arm.c } static int kvm_vcpu_initialized(struct kvm_vcpu *vcpu) -diff -Nur linux-4.1.26.orig/arch/arm/kvm/psci.c linux-4.1.26/arch/arm/kvm/psci.c ---- linux-4.1.26.orig/arch/arm/kvm/psci.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/arm/kvm/psci.c 2016-06-19 15:30:54.919152041 +0200 -@@ -68,7 +68,7 @@ +diff --git a/arch/arm/kvm/psci.c b/arch/arm/kvm/psci.c +index 531e922486b2..e24f0461ea2d 100644 +--- a/arch/arm/kvm/psci.c ++++ b/arch/arm/kvm/psci.c +@@ -68,7 +68,7 @@ static unsigned long kvm_psci_vcpu_on(struct kvm_vcpu *source_vcpu) { struct kvm *kvm = source_vcpu->kvm; struct kvm_vcpu *vcpu = NULL; @@ -402,7 +731,7 @@ diff -Nur linux-4.1.26.orig/arch/arm/kvm/psci.c linux-4.1.26/arch/arm/kvm/psci.c unsigned long cpu_id; unsigned long context_id; phys_addr_t target_pc; -@@ -117,7 +117,7 @@ +@@ -117,7 +117,7 @@ static unsigned long kvm_psci_vcpu_on(struct kvm_vcpu *source_vcpu) smp_mb(); /* Make sure the above is visible */ wq = kvm_arch_vcpu_wq(vcpu); @@ -411,10 +740,242 @@ diff -Nur linux-4.1.26.orig/arch/arm/kvm/psci.c linux-4.1.26/arch/arm/kvm/psci.c return PSCI_RET_SUCCESS; } -diff -Nur linux-4.1.26.orig/arch/arm/mach-exynos/platsmp.c linux-4.1.26/arch/arm/mach-exynos/platsmp.c ---- linux-4.1.26.orig/arch/arm/mach-exynos/platsmp.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/arm/mach-exynos/platsmp.c 2016-06-19 15:30:54.919152041 +0200 -@@ -231,7 +231,7 @@ +diff --git a/arch/arm/mach-at91/at91rm9200.c b/arch/arm/mach-at91/at91rm9200.c +index eaf58f88ef5d..8d3cb458a99c 100644 +--- a/arch/arm/mach-at91/at91rm9200.c ++++ b/arch/arm/mach-at91/at91rm9200.c +@@ -13,7 +13,6 @@ + #include <linux/of_platform.h> + + #include <asm/mach/arch.h> +-#include <asm/system_misc.h> + + #include "generic.h" + #include "soc.h" +@@ -34,7 +33,6 @@ static void __init at91rm9200_dt_device_init(void) + + of_platform_populate(NULL, of_default_bus_match_table, NULL, soc_dev); + +- arm_pm_idle = at91rm9200_idle; + at91rm9200_pm_init(); + } + +diff --git a/arch/arm/mach-at91/at91sam9.c b/arch/arm/mach-at91/at91sam9.c +index e47a2093a0e7..d2bede665a1b 100644 +--- a/arch/arm/mach-at91/at91sam9.c ++++ b/arch/arm/mach-at91/at91sam9.c +@@ -62,8 +62,6 @@ static void __init at91sam9_common_init(void) + soc_dev = soc_device_to_device(soc); + + of_platform_populate(NULL, of_default_bus_match_table, NULL, soc_dev); +- +- arm_pm_idle = at91sam9_idle; + } + + static void __init at91sam9_dt_device_init(void) +diff --git a/arch/arm/mach-at91/generic.h b/arch/arm/mach-at91/generic.h +index b0fa7dc7286d..28ca57a2060f 100644 +--- a/arch/arm/mach-at91/generic.h ++++ b/arch/arm/mach-at91/generic.h +@@ -11,27 +11,18 @@ + #ifndef _AT91_GENERIC_H + #define _AT91_GENERIC_H + +-#include <linux/of.h> +-#include <linux/reboot.h> +- +- /* Map io */ +-extern void __init at91_map_io(void); +-extern void __init at91_alt_map_io(void); +- +-/* idle */ +-extern void at91rm9200_idle(void); +-extern void at91sam9_idle(void); +- + #ifdef CONFIG_PM + extern void __init at91rm9200_pm_init(void); + extern void __init at91sam9260_pm_init(void); + extern void __init at91sam9g45_pm_init(void); + extern void __init at91sam9x5_pm_init(void); ++extern void __init sama5_pm_init(void); + #else + static inline void __init at91rm9200_pm_init(void) { } + static inline void __init at91sam9260_pm_init(void) { } + static inline void __init at91sam9g45_pm_init(void) { } + static inline void __init at91sam9x5_pm_init(void) { } ++static inline void __init sama5_pm_init(void) { } + #endif + + #endif /* _AT91_GENERIC_H */ +diff --git a/arch/arm/mach-at91/pm.c b/arch/arm/mach-at91/pm.c +index 5062699cbb12..3be82cf983dd 100644 +--- a/arch/arm/mach-at91/pm.c ++++ b/arch/arm/mach-at91/pm.c +@@ -31,10 +31,13 @@ + #include <asm/mach/irq.h> + #include <asm/fncpy.h> + #include <asm/cacheflush.h> ++#include <asm/system_misc.h> + + #include "generic.h" + #include "pm.h" + ++static void __iomem *pmc; ++ + /* + * FIXME: this is needed to communicate between the pinctrl driver and + * the PM implementation in the machine. Possibly part of the PM +@@ -85,7 +88,7 @@ static int at91_pm_verify_clocks(void) + unsigned long scsr; + int i; + +- scsr = at91_pmc_read(AT91_PMC_SCSR); ++ scsr = readl(pmc + AT91_PMC_SCSR); + + /* USB must not be using PLLB */ + if ((scsr & at91_pm_data.uhp_udp_mask) != 0) { +@@ -99,8 +102,7 @@ static int at91_pm_verify_clocks(void) + + if ((scsr & (AT91_PMC_PCK0 << i)) == 0) + continue; +- +- css = at91_pmc_read(AT91_PMC_PCKR(i)) & AT91_PMC_CSS; ++ css = readl(pmc + AT91_PMC_PCKR(i)) & AT91_PMC_CSS; + if (css != AT91_PMC_CSS_SLOW) { + pr_err("AT91: PM - Suspend-to-RAM with PCK%d src %d\n", i, css); + return 0; +@@ -143,8 +145,8 @@ static void at91_pm_suspend(suspend_state_t state) + flush_cache_all(); + outer_disable(); + +- at91_suspend_sram_fn(at91_pmc_base, at91_ramc_base[0], +- at91_ramc_base[1], pm_data); ++ at91_suspend_sram_fn(pmc, at91_ramc_base[0], ++ at91_ramc_base[1], pm_data); + + outer_resume(); + } +@@ -348,6 +350,21 @@ static __init void at91_dt_ramc(void) + at91_pm_set_standby(standby); + } + ++void at91rm9200_idle(void) ++{ ++ /* ++ * Disable the processor clock. The processor will be automatically ++ * re-enabled by an interrupt or by a reset. ++ */ ++ writel(AT91_PMC_PCK, pmc + AT91_PMC_SCDR); ++} ++ ++void at91sam9_idle(void) ++{ ++ writel(AT91_PMC_PCK, pmc + AT91_PMC_SCDR); ++ cpu_do_idle(); ++} ++ + static void __init at91_pm_sram_init(void) + { + struct gen_pool *sram_pool; +@@ -394,13 +411,36 @@ static void __init at91_pm_sram_init(void) + &at91_pm_suspend_in_sram, at91_pm_suspend_in_sram_sz); + } + +-static void __init at91_pm_init(void) ++static const struct of_device_id atmel_pmc_ids[] __initconst = { ++ { .compatible = "atmel,at91rm9200-pmc" }, ++ { .compatible = "atmel,at91sam9260-pmc" }, ++ { .compatible = "atmel,at91sam9g45-pmc" }, ++ { .compatible = "atmel,at91sam9n12-pmc" }, ++ { .compatible = "atmel,at91sam9x5-pmc" }, ++ { .compatible = "atmel,sama5d3-pmc" }, ++ { .compatible = "atmel,sama5d2-pmc" }, ++ { /* sentinel */ }, ++}; ++ ++static void __init at91_pm_init(void (*pm_idle)(void)) + { +- at91_pm_sram_init(); ++ struct device_node *pmc_np; + + if (at91_cpuidle_device.dev.platform_data) + platform_device_register(&at91_cpuidle_device); + ++ pmc_np = of_find_matching_node(NULL, atmel_pmc_ids); ++ pmc = of_iomap(pmc_np, 0); ++ if (!pmc) { ++ pr_err("AT91: PM not supported, PMC not found\n"); ++ return; ++ } ++ ++ if (pm_idle) ++ arm_pm_idle = pm_idle; ++ ++ at91_pm_sram_init(); ++ + if (at91_suspend_sram_fn) + suspend_set_ops(&at91_pm_ops); + else +@@ -419,7 +459,7 @@ void __init at91rm9200_pm_init(void) + at91_pm_data.uhp_udp_mask = AT91RM9200_PMC_UHP | AT91RM9200_PMC_UDP; + at91_pm_data.memctrl = AT91_MEMCTRL_MC; + +- at91_pm_init(); ++ at91_pm_init(at91rm9200_idle); + } + + void __init at91sam9260_pm_init(void) +@@ -427,7 +467,7 @@ void __init at91sam9260_pm_init(void) + at91_dt_ramc(); + at91_pm_data.memctrl = AT91_MEMCTRL_SDRAMC; + at91_pm_data.uhp_udp_mask = AT91SAM926x_PMC_UHP | AT91SAM926x_PMC_UDP; +- return at91_pm_init(); ++ at91_pm_init(at91sam9_idle); + } + + void __init at91sam9g45_pm_init(void) +@@ -435,7 +475,7 @@ void __init at91sam9g45_pm_init(void) + at91_dt_ramc(); + at91_pm_data.uhp_udp_mask = AT91SAM926x_PMC_UHP; + at91_pm_data.memctrl = AT91_MEMCTRL_DDRSDR; +- return at91_pm_init(); ++ at91_pm_init(at91sam9_idle); + } + + void __init at91sam9x5_pm_init(void) +@@ -443,5 +483,13 @@ void __init at91sam9x5_pm_init(void) + at91_dt_ramc(); + at91_pm_data.uhp_udp_mask = AT91SAM926x_PMC_UHP | AT91SAM926x_PMC_UDP; + at91_pm_data.memctrl = AT91_MEMCTRL_DDRSDR; +- return at91_pm_init(); ++ at91_pm_init(at91sam9_idle); ++} ++ ++void __init sama5_pm_init(void) ++{ ++ at91_dt_ramc(); ++ at91_pm_data.uhp_udp_mask = AT91SAM926x_PMC_UHP | AT91SAM926x_PMC_UDP; ++ at91_pm_data.memctrl = AT91_MEMCTRL_DDRSDR; ++ at91_pm_init(NULL); + } +diff --git a/arch/arm/mach-at91/sama5.c b/arch/arm/mach-at91/sama5.c +index 41d829d8e7d5..3755da6decf5 100644 +--- a/arch/arm/mach-at91/sama5.c ++++ b/arch/arm/mach-at91/sama5.c +@@ -49,7 +49,7 @@ static void __init sama5_dt_device_init(void) + soc_dev = soc_device_to_device(soc); + + of_platform_populate(NULL, of_default_bus_match_table, NULL, soc_dev); +- at91sam9x5_pm_init(); ++ sama5_pm_init(); + } + + static const char *sama5_dt_board_compat[] __initconst = { +diff --git a/arch/arm/mach-exynos/platsmp.c b/arch/arm/mach-exynos/platsmp.c +index a825bca2a2b6..4619e228df41 100644 +--- a/arch/arm/mach-exynos/platsmp.c ++++ b/arch/arm/mach-exynos/platsmp.c +@@ -231,7 +231,7 @@ static void __iomem *scu_base_addr(void) return (void __iomem *)(S5P_VA_SCU); } @@ -423,7 +984,7 @@ diff -Nur linux-4.1.26.orig/arch/arm/mach-exynos/platsmp.c linux-4.1.26/arch/arm static void exynos_secondary_init(unsigned int cpu) { -@@ -244,8 +244,8 @@ +@@ -244,8 +244,8 @@ static void exynos_secondary_init(unsigned int cpu) /* * Synchronise with the boot thread. */ @@ -434,7 +995,7 @@ diff -Nur linux-4.1.26.orig/arch/arm/mach-exynos/platsmp.c linux-4.1.26/arch/arm } static int exynos_boot_secondary(unsigned int cpu, struct task_struct *idle) -@@ -259,7 +259,7 @@ +@@ -259,7 +259,7 @@ static int exynos_boot_secondary(unsigned int cpu, struct task_struct *idle) * Set synchronisation state between this boot processor * and the secondary one */ @@ -443,7 +1004,7 @@ diff -Nur linux-4.1.26.orig/arch/arm/mach-exynos/platsmp.c linux-4.1.26/arch/arm /* * The secondary processor is waiting to be released from -@@ -286,7 +286,7 @@ +@@ -286,7 +286,7 @@ static int exynos_boot_secondary(unsigned int cpu, struct task_struct *idle) if (timeout == 0) { printk(KERN_ERR "cpu1 power enable failed"); @@ -452,7 +1013,7 @@ diff -Nur linux-4.1.26.orig/arch/arm/mach-exynos/platsmp.c linux-4.1.26/arch/arm return -ETIMEDOUT; } } -@@ -342,7 +342,7 @@ +@@ -342,7 +342,7 @@ static int exynos_boot_secondary(unsigned int cpu, struct task_struct *idle) * calibrations, then wait for it to finish */ fail: @@ -461,9 +1022,10 @@ diff -Nur linux-4.1.26.orig/arch/arm/mach-exynos/platsmp.c linux-4.1.26/arch/arm return pen_release != -1 ? ret : 0; } -diff -Nur linux-4.1.26.orig/arch/arm/mach-hisi/platmcpm.c linux-4.1.26/arch/arm/mach-hisi/platmcpm.c ---- linux-4.1.26.orig/arch/arm/mach-hisi/platmcpm.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/arm/mach-hisi/platmcpm.c 2016-06-19 15:30:54.923152195 +0200 +diff --git a/arch/arm/mach-hisi/platmcpm.c b/arch/arm/mach-hisi/platmcpm.c +index 280f3f14f77c..bc2ed95c0e62 100644 +--- a/arch/arm/mach-hisi/platmcpm.c ++++ b/arch/arm/mach-hisi/platmcpm.c @@ -57,7 +57,7 @@ static void __iomem *sysctrl, *fabric; @@ -473,7 +1035,7 @@ diff -Nur linux-4.1.26.orig/arch/arm/mach-hisi/platmcpm.c linux-4.1.26/arch/arm/ static u32 fabric_phys_addr; /* * [0]: bootwrapper physical address -@@ -104,7 +104,7 @@ +@@ -104,7 +104,7 @@ static int hip04_mcpm_power_up(unsigned int cpu, unsigned int cluster) if (cluster >= HIP04_MAX_CLUSTERS || cpu >= HIP04_MAX_CPUS_PER_CLUSTER) return -EINVAL; @@ -482,7 +1044,7 @@ diff -Nur linux-4.1.26.orig/arch/arm/mach-hisi/platmcpm.c linux-4.1.26/arch/arm/ if (hip04_cpu_table[cluster][cpu]) goto out; -@@ -133,7 +133,7 @@ +@@ -133,7 +133,7 @@ static int hip04_mcpm_power_up(unsigned int cpu, unsigned int cluster) udelay(20); out: hip04_cpu_table[cluster][cpu]++; @@ -491,7 +1053,7 @@ diff -Nur linux-4.1.26.orig/arch/arm/mach-hisi/platmcpm.c linux-4.1.26/arch/arm/ return 0; } -@@ -149,7 +149,7 @@ +@@ -149,7 +149,7 @@ static void hip04_mcpm_power_down(void) __mcpm_cpu_going_down(cpu, cluster); @@ -500,7 +1062,7 @@ diff -Nur linux-4.1.26.orig/arch/arm/mach-hisi/platmcpm.c linux-4.1.26/arch/arm/ BUG_ON(__mcpm_cluster_state(cluster) != CLUSTER_UP); hip04_cpu_table[cluster][cpu]--; if (hip04_cpu_table[cluster][cpu] == 1) { -@@ -162,7 +162,7 @@ +@@ -162,7 +162,7 @@ static void hip04_mcpm_power_down(void) last_man = hip04_cluster_is_down(cluster); if (last_man && __mcpm_outbound_enter_critical(cpu, cluster)) { @@ -509,7 +1071,7 @@ diff -Nur linux-4.1.26.orig/arch/arm/mach-hisi/platmcpm.c linux-4.1.26/arch/arm/ /* Since it's Cortex A15, disable L2 prefetching. */ asm volatile( "mcr p15, 1, %0, c15, c0, 3 \n\t" -@@ -173,7 +173,7 @@ +@@ -173,7 +173,7 @@ static void hip04_mcpm_power_down(void) hip04_set_snoop_filter(cluster, 0); __mcpm_outbound_leave_critical(cluster, CLUSTER_DOWN); } else { @@ -518,7 +1080,7 @@ diff -Nur linux-4.1.26.orig/arch/arm/mach-hisi/platmcpm.c linux-4.1.26/arch/arm/ v7_exit_coherency_flush(louis); } -@@ -192,7 +192,7 @@ +@@ -192,7 +192,7 @@ static int hip04_mcpm_wait_for_powerdown(unsigned int cpu, unsigned int cluster) cpu >= HIP04_MAX_CPUS_PER_CLUSTER); count = TIMEOUT_MSEC / POLL_MSEC; @@ -527,7 +1089,7 @@ diff -Nur linux-4.1.26.orig/arch/arm/mach-hisi/platmcpm.c linux-4.1.26/arch/arm/ for (tries = 0; tries < count; tries++) { if (hip04_cpu_table[cluster][cpu]) { ret = -EBUSY; -@@ -202,10 +202,10 @@ +@@ -202,10 +202,10 @@ static int hip04_mcpm_wait_for_powerdown(unsigned int cpu, unsigned int cluster) data = readl_relaxed(sysctrl + SC_CPU_RESET_STATUS(cluster)); if (data & CORE_WFI_STATUS(cpu)) break; @@ -540,7 +1102,7 @@ diff -Nur linux-4.1.26.orig/arch/arm/mach-hisi/platmcpm.c linux-4.1.26/arch/arm/ } if (tries >= count) goto err; -@@ -220,10 +220,10 @@ +@@ -220,10 +220,10 @@ static int hip04_mcpm_wait_for_powerdown(unsigned int cpu, unsigned int cluster) } if (tries >= count) goto err; @@ -553,7 +1115,7 @@ diff -Nur linux-4.1.26.orig/arch/arm/mach-hisi/platmcpm.c linux-4.1.26/arch/arm/ return ret; } -@@ -235,10 +235,10 @@ +@@ -235,10 +235,10 @@ static void hip04_mcpm_powered_up(void) cpu = MPIDR_AFFINITY_LEVEL(mpidr, 0); cluster = MPIDR_AFFINITY_LEVEL(mpidr, 1); @@ -566,10 +1128,11 @@ diff -Nur linux-4.1.26.orig/arch/arm/mach-hisi/platmcpm.c linux-4.1.26/arch/arm/ } static void __naked hip04_mcpm_power_up_setup(unsigned int affinity_level) -diff -Nur linux-4.1.26.orig/arch/arm/mach-omap2/gpio.c linux-4.1.26/arch/arm/mach-omap2/gpio.c ---- linux-4.1.26.orig/arch/arm/mach-omap2/gpio.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/arm/mach-omap2/gpio.c 2016-06-19 15:30:54.923152195 +0200 -@@ -130,7 +130,6 @@ +diff --git a/arch/arm/mach-omap2/gpio.c b/arch/arm/mach-omap2/gpio.c +index 7a577145b68b..689a1af47c80 100644 +--- a/arch/arm/mach-omap2/gpio.c ++++ b/arch/arm/mach-omap2/gpio.c +@@ -130,7 +130,6 @@ static int __init omap2_gpio_dev_init(struct omap_hwmod *oh, void *unused) } pwrdm = omap_hwmod_get_pwrdm(oh); @@ -577,9 +1140,10 @@ diff -Nur linux-4.1.26.orig/arch/arm/mach-omap2/gpio.c linux-4.1.26/arch/arm/mac pdev = omap_device_build(name, id - 1, oh, pdata, sizeof(*pdata)); kfree(pdata); -diff -Nur linux-4.1.26.orig/arch/arm/mach-omap2/omap-smp.c linux-4.1.26/arch/arm/mach-omap2/omap-smp.c ---- linux-4.1.26.orig/arch/arm/mach-omap2/omap-smp.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/arm/mach-omap2/omap-smp.c 2016-06-19 15:30:54.923152195 +0200 +diff --git a/arch/arm/mach-omap2/omap-smp.c b/arch/arm/mach-omap2/omap-smp.c +index 5305ec7341ec..19732b56088b 100644 +--- a/arch/arm/mach-omap2/omap-smp.c ++++ b/arch/arm/mach-omap2/omap-smp.c @@ -43,7 +43,7 @@ /* SCU base address */ static void __iomem *scu_base; @@ -589,7 +1153,7 @@ diff -Nur linux-4.1.26.orig/arch/arm/mach-omap2/omap-smp.c linux-4.1.26/arch/arm void __iomem *omap4_get_scu_base(void) { -@@ -74,8 +74,8 @@ +@@ -74,8 +74,8 @@ static void omap4_secondary_init(unsigned int cpu) /* * Synchronise with the boot thread. */ @@ -600,7 +1164,7 @@ diff -Nur linux-4.1.26.orig/arch/arm/mach-omap2/omap-smp.c linux-4.1.26/arch/arm } static int omap4_boot_secondary(unsigned int cpu, struct task_struct *idle) -@@ -89,7 +89,7 @@ +@@ -89,7 +89,7 @@ static int omap4_boot_secondary(unsigned int cpu, struct task_struct *idle) * Set synchronisation state between this boot processor * and the secondary one */ @@ -609,7 +1173,7 @@ diff -Nur linux-4.1.26.orig/arch/arm/mach-omap2/omap-smp.c linux-4.1.26/arch/arm /* * Update the AuxCoreBoot0 with boot state for secondary core. -@@ -166,7 +166,7 @@ +@@ -166,7 +166,7 @@ static int omap4_boot_secondary(unsigned int cpu, struct task_struct *idle) * Now the secondary core is starting up let it run its * calibrations, then wait for it to finish */ @@ -618,10 +1182,11 @@ diff -Nur linux-4.1.26.orig/arch/arm/mach-omap2/omap-smp.c linux-4.1.26/arch/arm return 0; } -diff -Nur linux-4.1.26.orig/arch/arm/mach-omap2/powerdomain.c linux-4.1.26/arch/arm/mach-omap2/powerdomain.c ---- linux-4.1.26.orig/arch/arm/mach-omap2/powerdomain.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/arm/mach-omap2/powerdomain.c 2016-06-19 15:30:54.923152195 +0200 -@@ -1166,43 +1166,3 @@ +diff --git a/arch/arm/mach-omap2/powerdomain.c b/arch/arm/mach-omap2/powerdomain.c +index 78af6d8cf2e2..ef4227ffa3b6 100644 +--- a/arch/arm/mach-omap2/powerdomain.c ++++ b/arch/arm/mach-omap2/powerdomain.c +@@ -1166,43 +1166,3 @@ int pwrdm_get_context_loss_count(struct powerdomain *pwrdm) return count; } @@ -665,10 +1230,11 @@ diff -Nur linux-4.1.26.orig/arch/arm/mach-omap2/powerdomain.c linux-4.1.26/arch/ - - return 0; -} -diff -Nur linux-4.1.26.orig/arch/arm/mach-omap2/powerdomain.h linux-4.1.26/arch/arm/mach-omap2/powerdomain.h ---- linux-4.1.26.orig/arch/arm/mach-omap2/powerdomain.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/arm/mach-omap2/powerdomain.h 2016-06-19 15:30:54.923152195 +0200 -@@ -244,7 +244,6 @@ +diff --git a/arch/arm/mach-omap2/powerdomain.h b/arch/arm/mach-omap2/powerdomain.h +index 28a796ce07d7..5e0c033a21db 100644 +--- a/arch/arm/mach-omap2/powerdomain.h ++++ b/arch/arm/mach-omap2/powerdomain.h +@@ -244,7 +244,6 @@ int pwrdm_state_switch(struct powerdomain *pwrdm); int pwrdm_pre_transition(struct powerdomain *pwrdm); int pwrdm_post_transition(struct powerdomain *pwrdm); int pwrdm_get_context_loss_count(struct powerdomain *pwrdm); @@ -676,9 +1242,10 @@ diff -Nur linux-4.1.26.orig/arch/arm/mach-omap2/powerdomain.h linux-4.1.26/arch/ extern int omap_set_pwrdm_state(struct powerdomain *pwrdm, u8 state); -diff -Nur linux-4.1.26.orig/arch/arm/mach-prima2/platsmp.c linux-4.1.26/arch/arm/mach-prima2/platsmp.c ---- linux-4.1.26.orig/arch/arm/mach-prima2/platsmp.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/arm/mach-prima2/platsmp.c 2016-06-19 15:30:54.923152195 +0200 +diff --git a/arch/arm/mach-prima2/platsmp.c b/arch/arm/mach-prima2/platsmp.c +index e46c91094dde..dcb3ed0c26da 100644 +--- a/arch/arm/mach-prima2/platsmp.c ++++ b/arch/arm/mach-prima2/platsmp.c @@ -22,7 +22,7 @@ static void __iomem *clk_base; @@ -688,7 +1255,7 @@ diff -Nur linux-4.1.26.orig/arch/arm/mach-prima2/platsmp.c linux-4.1.26/arch/arm static void sirfsoc_secondary_init(unsigned int cpu) { -@@ -36,8 +36,8 @@ +@@ -36,8 +36,8 @@ static void sirfsoc_secondary_init(unsigned int cpu) /* * Synchronise with the boot thread. */ @@ -699,7 +1266,7 @@ diff -Nur linux-4.1.26.orig/arch/arm/mach-prima2/platsmp.c linux-4.1.26/arch/arm } static const struct of_device_id clk_ids[] = { -@@ -75,7 +75,7 @@ +@@ -75,7 +75,7 @@ static int sirfsoc_boot_secondary(unsigned int cpu, struct task_struct *idle) /* make sure write buffer is drained */ mb(); @@ -708,7 +1275,7 @@ diff -Nur linux-4.1.26.orig/arch/arm/mach-prima2/platsmp.c linux-4.1.26/arch/arm /* * The secondary processor is waiting to be released from -@@ -107,7 +107,7 @@ +@@ -107,7 +107,7 @@ static int sirfsoc_boot_secondary(unsigned int cpu, struct task_struct *idle) * now the secondary core is starting up let it run its * calibrations, then wait for it to finish */ @@ -717,9 +1284,10 @@ diff -Nur linux-4.1.26.orig/arch/arm/mach-prima2/platsmp.c linux-4.1.26/arch/arm return pen_release != -1 ? -ENOSYS : 0; } -diff -Nur linux-4.1.26.orig/arch/arm/mach-qcom/platsmp.c linux-4.1.26/arch/arm/mach-qcom/platsmp.c ---- linux-4.1.26.orig/arch/arm/mach-qcom/platsmp.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/arm/mach-qcom/platsmp.c 2016-06-19 15:30:54.923152195 +0200 +diff --git a/arch/arm/mach-qcom/platsmp.c b/arch/arm/mach-qcom/platsmp.c +index 5cde63a64b34..82c9b9145c3e 100644 +--- a/arch/arm/mach-qcom/platsmp.c ++++ b/arch/arm/mach-qcom/platsmp.c @@ -46,7 +46,7 @@ extern void secondary_startup_arm(void); @@ -729,7 +1297,7 @@ diff -Nur linux-4.1.26.orig/arch/arm/mach-qcom/platsmp.c linux-4.1.26/arch/arm/m #ifdef CONFIG_HOTPLUG_CPU static void __ref qcom_cpu_die(unsigned int cpu) -@@ -60,8 +60,8 @@ +@@ -60,8 +60,8 @@ static void qcom_secondary_init(unsigned int cpu) /* * Synchronise with the boot thread. */ @@ -740,7 +1308,7 @@ diff -Nur linux-4.1.26.orig/arch/arm/mach-qcom/platsmp.c linux-4.1.26/arch/arm/m } static int scss_release_secondary(unsigned int cpu) -@@ -284,7 +284,7 @@ +@@ -284,7 +284,7 @@ static int qcom_boot_secondary(unsigned int cpu, int (*func)(unsigned int)) * set synchronisation state between this boot processor * and the secondary one */ @@ -749,7 +1317,7 @@ diff -Nur linux-4.1.26.orig/arch/arm/mach-qcom/platsmp.c linux-4.1.26/arch/arm/m /* * Send the secondary CPU a soft interrupt, thereby causing -@@ -297,7 +297,7 @@ +@@ -297,7 +297,7 @@ static int qcom_boot_secondary(unsigned int cpu, int (*func)(unsigned int)) * now the secondary core is starting up let it run its * calibrations, then wait for it to finish */ @@ -758,10 +1326,11 @@ diff -Nur linux-4.1.26.orig/arch/arm/mach-qcom/platsmp.c linux-4.1.26/arch/arm/m return ret; } -diff -Nur linux-4.1.26.orig/arch/arm/mach-spear/platsmp.c linux-4.1.26/arch/arm/mach-spear/platsmp.c ---- linux-4.1.26.orig/arch/arm/mach-spear/platsmp.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/arm/mach-spear/platsmp.c 2016-06-19 15:30:54.923152195 +0200 -@@ -32,7 +32,7 @@ +diff --git a/arch/arm/mach-spear/platsmp.c b/arch/arm/mach-spear/platsmp.c +index fd4297713d67..b0553b2c2d53 100644 +--- a/arch/arm/mach-spear/platsmp.c ++++ b/arch/arm/mach-spear/platsmp.c +@@ -32,7 +32,7 @@ static void write_pen_release(int val) sync_cache_w(&pen_release); } @@ -770,7 +1339,7 @@ diff -Nur linux-4.1.26.orig/arch/arm/mach-spear/platsmp.c linux-4.1.26/arch/arm/ static void __iomem *scu_base = IOMEM(VA_SCU_BASE); -@@ -47,8 +47,8 @@ +@@ -47,8 +47,8 @@ static void spear13xx_secondary_init(unsigned int cpu) /* * Synchronise with the boot thread. */ @@ -781,7 +1350,7 @@ diff -Nur linux-4.1.26.orig/arch/arm/mach-spear/platsmp.c linux-4.1.26/arch/arm/ } static int spear13xx_boot_secondary(unsigned int cpu, struct task_struct *idle) -@@ -59,7 +59,7 @@ +@@ -59,7 +59,7 @@ static int spear13xx_boot_secondary(unsigned int cpu, struct task_struct *idle) * set synchronisation state between this boot processor * and the secondary one */ @@ -790,7 +1359,7 @@ diff -Nur linux-4.1.26.orig/arch/arm/mach-spear/platsmp.c linux-4.1.26/arch/arm/ /* * The secondary processor is waiting to be released from -@@ -84,7 +84,7 @@ +@@ -84,7 +84,7 @@ static int spear13xx_boot_secondary(unsigned int cpu, struct task_struct *idle) * now the secondary core is starting up let it run its * calibrations, then wait for it to finish */ @@ -799,10 +1368,11 @@ diff -Nur linux-4.1.26.orig/arch/arm/mach-spear/platsmp.c linux-4.1.26/arch/arm/ return pen_release != -1 ? -ENOSYS : 0; } -diff -Nur linux-4.1.26.orig/arch/arm/mach-sti/platsmp.c linux-4.1.26/arch/arm/mach-sti/platsmp.c ---- linux-4.1.26.orig/arch/arm/mach-sti/platsmp.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/arm/mach-sti/platsmp.c 2016-06-19 15:30:54.923152195 +0200 -@@ -34,7 +34,7 @@ +diff --git a/arch/arm/mach-sti/platsmp.c b/arch/arm/mach-sti/platsmp.c +index d4b624f8dfcb..56d4028122f5 100644 +--- a/arch/arm/mach-sti/platsmp.c ++++ b/arch/arm/mach-sti/platsmp.c +@@ -34,7 +34,7 @@ static void write_pen_release(int val) sync_cache_w(&pen_release); } @@ -811,7 +1381,7 @@ diff -Nur linux-4.1.26.orig/arch/arm/mach-sti/platsmp.c linux-4.1.26/arch/arm/ma static void sti_secondary_init(unsigned int cpu) { -@@ -49,8 +49,8 @@ +@@ -49,8 +49,8 @@ static void sti_secondary_init(unsigned int cpu) /* * Synchronise with the boot thread. */ @@ -822,7 +1392,7 @@ diff -Nur linux-4.1.26.orig/arch/arm/mach-sti/platsmp.c linux-4.1.26/arch/arm/ma } static int sti_boot_secondary(unsigned int cpu, struct task_struct *idle) -@@ -61,7 +61,7 @@ +@@ -61,7 +61,7 @@ static int sti_boot_secondary(unsigned int cpu, struct task_struct *idle) * set synchronisation state between this boot processor * and the secondary one */ @@ -831,7 +1401,7 @@ diff -Nur linux-4.1.26.orig/arch/arm/mach-sti/platsmp.c linux-4.1.26/arch/arm/ma /* * The secondary processor is waiting to be released from -@@ -92,7 +92,7 @@ +@@ -92,7 +92,7 @@ static int sti_boot_secondary(unsigned int cpu, struct task_struct *idle) * now the secondary core is starting up let it run its * calibrations, then wait for it to finish */ @@ -840,10 +1410,11 @@ diff -Nur linux-4.1.26.orig/arch/arm/mach-sti/platsmp.c linux-4.1.26/arch/arm/ma return pen_release != -1 ? -ENOSYS : 0; } -diff -Nur linux-4.1.26.orig/arch/arm/mach-ux500/platsmp.c linux-4.1.26/arch/arm/mach-ux500/platsmp.c ---- linux-4.1.26.orig/arch/arm/mach-ux500/platsmp.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/arm/mach-ux500/platsmp.c 2016-06-19 15:30:54.923152195 +0200 -@@ -51,7 +51,7 @@ +diff --git a/arch/arm/mach-ux500/platsmp.c b/arch/arm/mach-ux500/platsmp.c +index a44967f3168c..3af22a4836bf 100644 +--- a/arch/arm/mach-ux500/platsmp.c ++++ b/arch/arm/mach-ux500/platsmp.c +@@ -51,7 +51,7 @@ static void __iomem *scu_base_addr(void) return NULL; } @@ -852,7 +1423,7 @@ diff -Nur linux-4.1.26.orig/arch/arm/mach-ux500/platsmp.c linux-4.1.26/arch/arm/ static void ux500_secondary_init(unsigned int cpu) { -@@ -64,8 +64,8 @@ +@@ -64,8 +64,8 @@ static void ux500_secondary_init(unsigned int cpu) /* * Synchronise with the boot thread. */ @@ -863,7 +1434,7 @@ diff -Nur linux-4.1.26.orig/arch/arm/mach-ux500/platsmp.c linux-4.1.26/arch/arm/ } static int ux500_boot_secondary(unsigned int cpu, struct task_struct *idle) -@@ -76,7 +76,7 @@ +@@ -76,7 +76,7 @@ static int ux500_boot_secondary(unsigned int cpu, struct task_struct *idle) * set synchronisation state between this boot processor * and the secondary one */ @@ -872,7 +1443,7 @@ diff -Nur linux-4.1.26.orig/arch/arm/mach-ux500/platsmp.c linux-4.1.26/arch/arm/ /* * The secondary processor is waiting to be released from -@@ -97,7 +97,7 @@ +@@ -97,7 +97,7 @@ static int ux500_boot_secondary(unsigned int cpu, struct task_struct *idle) * now the secondary core is starting up let it run its * calibrations, then wait for it to finish */ @@ -881,10 +1452,11 @@ diff -Nur linux-4.1.26.orig/arch/arm/mach-ux500/platsmp.c linux-4.1.26/arch/arm/ return pen_release != -1 ? -ENOSYS : 0; } -diff -Nur linux-4.1.26.orig/arch/arm/mm/fault.c linux-4.1.26/arch/arm/mm/fault.c ---- linux-4.1.26.orig/arch/arm/mm/fault.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/arm/mm/fault.c 2016-06-19 15:30:54.923152195 +0200 -@@ -276,7 +276,7 @@ +diff --git a/arch/arm/mm/fault.c b/arch/arm/mm/fault.c +index 6333d9c17875..62016e3e4a9c 100644 +--- a/arch/arm/mm/fault.c ++++ b/arch/arm/mm/fault.c +@@ -276,7 +276,7 @@ do_page_fault(unsigned long addr, unsigned int fsr, struct pt_regs *regs) * If we're in an interrupt or have no user * context, we must not take the fault.. */ @@ -893,7 +1465,7 @@ diff -Nur linux-4.1.26.orig/arch/arm/mm/fault.c linux-4.1.26/arch/arm/mm/fault.c goto no_context; if (user_mode(regs)) -@@ -430,6 +430,9 @@ +@@ -430,6 +430,9 @@ do_translation_fault(unsigned long addr, unsigned int fsr, if (addr < TASK_SIZE) return do_page_fault(addr, fsr, regs); @@ -903,7 +1475,7 @@ diff -Nur linux-4.1.26.orig/arch/arm/mm/fault.c linux-4.1.26/arch/arm/mm/fault.c if (user_mode(regs)) goto bad_area; -@@ -497,6 +500,9 @@ +@@ -497,6 +500,9 @@ do_translation_fault(unsigned long addr, unsigned int fsr, static int do_sect_fault(unsigned long addr, unsigned int fsr, struct pt_regs *regs) { @@ -913,10 +1485,11 @@ diff -Nur linux-4.1.26.orig/arch/arm/mm/fault.c linux-4.1.26/arch/arm/mm/fault.c do_bad_area(addr, fsr, regs); return 0; } -diff -Nur linux-4.1.26.orig/arch/arm/mm/highmem.c linux-4.1.26/arch/arm/mm/highmem.c ---- linux-4.1.26.orig/arch/arm/mm/highmem.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/arm/mm/highmem.c 2016-06-19 15:30:54.923152195 +0200 -@@ -54,11 +54,13 @@ +diff --git a/arch/arm/mm/highmem.c b/arch/arm/mm/highmem.c +index b98895d9fe57..4050e9d99d6b 100644 +--- a/arch/arm/mm/highmem.c ++++ b/arch/arm/mm/highmem.c +@@ -54,11 +54,13 @@ EXPORT_SYMBOL(kunmap); void *kmap_atomic(struct page *page) { @@ -930,7 +1503,7 @@ diff -Nur linux-4.1.26.orig/arch/arm/mm/highmem.c linux-4.1.26/arch/arm/mm/highm pagefault_disable(); if (!PageHighMem(page)) return page_address(page); -@@ -92,7 +94,10 @@ +@@ -92,7 +94,10 @@ void *kmap_atomic(struct page *page) * in place, so the contained TLB flush ensures the TLB is updated * with the new mapping. */ @@ -942,7 +1515,7 @@ diff -Nur linux-4.1.26.orig/arch/arm/mm/highmem.c linux-4.1.26/arch/arm/mm/highm return (void *)vaddr; } -@@ -109,27 +114,33 @@ +@@ -109,27 +114,33 @@ void __kunmap_atomic(void *kvaddr) if (cache_is_vivt()) __cpuc_flush_dcache_area((void *)vaddr, PAGE_SIZE); @@ -977,7 +1550,7 @@ diff -Nur linux-4.1.26.orig/arch/arm/mm/highmem.c linux-4.1.26/arch/arm/mm/highm pagefault_disable(); if (!PageHighMem(page)) return page_address(page); -@@ -140,7 +151,10 @@ +@@ -140,7 +151,10 @@ void *kmap_atomic_pfn(unsigned long pfn) #ifdef CONFIG_DEBUG_HIGHMEM BUG_ON(!pte_none(get_fixmap_pte(vaddr))); #endif @@ -989,7 +1562,7 @@ diff -Nur linux-4.1.26.orig/arch/arm/mm/highmem.c linux-4.1.26/arch/arm/mm/highm return (void *)vaddr; } -@@ -154,3 +168,28 @@ +@@ -154,3 +168,28 @@ struct page *kmap_atomic_to_page(const void *ptr) return pte_page(get_fixmap_pte(vaddr)); } @@ -1018,10 +1591,11 @@ diff -Nur linux-4.1.26.orig/arch/arm/mm/highmem.c linux-4.1.26/arch/arm/mm/highm + } +} +#endif -diff -Nur linux-4.1.26.orig/arch/arm/plat-versatile/platsmp.c linux-4.1.26/arch/arm/plat-versatile/platsmp.c ---- linux-4.1.26.orig/arch/arm/plat-versatile/platsmp.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/arm/plat-versatile/platsmp.c 2016-06-19 15:30:54.923152195 +0200 -@@ -30,7 +30,7 @@ +diff --git a/arch/arm/plat-versatile/platsmp.c b/arch/arm/plat-versatile/platsmp.c +index 53feb90c840c..b4a8d54fc3f3 100644 +--- a/arch/arm/plat-versatile/platsmp.c ++++ b/arch/arm/plat-versatile/platsmp.c +@@ -30,7 +30,7 @@ static void write_pen_release(int val) sync_cache_w(&pen_release); } @@ -1030,7 +1604,7 @@ diff -Nur linux-4.1.26.orig/arch/arm/plat-versatile/platsmp.c linux-4.1.26/arch/ void versatile_secondary_init(unsigned int cpu) { -@@ -43,8 +43,8 @@ +@@ -43,8 +43,8 @@ void versatile_secondary_init(unsigned int cpu) /* * Synchronise with the boot thread. */ @@ -1041,7 +1615,7 @@ diff -Nur linux-4.1.26.orig/arch/arm/plat-versatile/platsmp.c linux-4.1.26/arch/ } int versatile_boot_secondary(unsigned int cpu, struct task_struct *idle) -@@ -55,7 +55,7 @@ +@@ -55,7 +55,7 @@ int versatile_boot_secondary(unsigned int cpu, struct task_struct *idle) * Set synchronisation state between this boot processor * and the secondary one */ @@ -1050,7 +1624,7 @@ diff -Nur linux-4.1.26.orig/arch/arm/plat-versatile/platsmp.c linux-4.1.26/arch/ /* * This is really belt and braces; we hold unintended secondary -@@ -85,7 +85,7 @@ +@@ -85,7 +85,7 @@ int versatile_boot_secondary(unsigned int cpu, struct task_struct *idle) * now the secondary core is starting up let it run its * calibrations, then wait for it to finish */ @@ -1059,10 +1633,35 @@ diff -Nur linux-4.1.26.orig/arch/arm/plat-versatile/platsmp.c linux-4.1.26/arch/ return pen_release != -1 ? -ENOSYS : 0; } -diff -Nur linux-4.1.26.orig/arch/arm64/include/asm/futex.h linux-4.1.26/arch/arm64/include/asm/futex.h ---- linux-4.1.26.orig/arch/arm64/include/asm/futex.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/arm64/include/asm/futex.h 2016-06-19 15:30:54.923152195 +0200 -@@ -58,7 +58,7 @@ +diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig +index 6f0a3b41b009..09a41259b984 100644 +--- a/arch/arm64/Kconfig ++++ b/arch/arm64/Kconfig +@@ -69,8 +69,10 @@ config ARM64 + select HAVE_PERF_REGS + select HAVE_PERF_USER_STACK_DUMP + select HAVE_RCU_TABLE_FREE ++ select HAVE_PREEMPT_LAZY + select HAVE_SYSCALL_TRACEPOINTS + select IRQ_DOMAIN ++ select IRQ_FORCED_THREADING + select MODULES_USE_ELF_RELA + select NO_BOOTMEM + select OF +@@ -599,7 +601,7 @@ config XEN_DOM0 + + config XEN + bool "Xen guest support on ARM64" +- depends on ARM64 && OF ++ depends on ARM64 && OF && !PREEMPT_RT_FULL + select SWIOTLB_XEN + help + Say Y if you want to run Linux in a Virtual Machine on Xen on ARM64. +diff --git a/arch/arm64/include/asm/futex.h b/arch/arm64/include/asm/futex.h +index 5f750dc96e0f..74069b3bd919 100644 +--- a/arch/arm64/include/asm/futex.h ++++ b/arch/arm64/include/asm/futex.h +@@ -58,7 +58,7 @@ futex_atomic_op_inuser (int encoded_op, u32 __user *uaddr) if (!access_ok(VERIFY_WRITE, uaddr, sizeof(u32))) return -EFAULT; @@ -1071,7 +1670,7 @@ diff -Nur linux-4.1.26.orig/arch/arm64/include/asm/futex.h linux-4.1.26/arch/arm switch (op) { case FUTEX_OP_SET: -@@ -85,7 +85,7 @@ +@@ -85,7 +85,7 @@ futex_atomic_op_inuser (int encoded_op, u32 __user *uaddr) ret = -ENOSYS; } @@ -1080,10 +1679,11 @@ diff -Nur linux-4.1.26.orig/arch/arm64/include/asm/futex.h linux-4.1.26/arch/arm if (!ret) { switch (cmp) { -diff -Nur linux-4.1.26.orig/arch/arm64/include/asm/thread_info.h linux-4.1.26/arch/arm64/include/asm/thread_info.h ---- linux-4.1.26.orig/arch/arm64/include/asm/thread_info.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/arm64/include/asm/thread_info.h 2016-06-19 15:30:54.923152195 +0200 -@@ -47,6 +47,7 @@ +diff --git a/arch/arm64/include/asm/thread_info.h b/arch/arm64/include/asm/thread_info.h +index dcd06d18a42a..7d45b00db1b3 100644 +--- a/arch/arm64/include/asm/thread_info.h ++++ b/arch/arm64/include/asm/thread_info.h +@@ -47,6 +47,7 @@ struct thread_info { mm_segment_t addr_limit; /* address limit */ struct task_struct *task; /* main task structure */ int preempt_count; /* 0 => preemptable, <0 => bug */ @@ -1091,7 +1691,7 @@ diff -Nur linux-4.1.26.orig/arch/arm64/include/asm/thread_info.h linux-4.1.26/ar int cpu; /* cpu */ }; -@@ -101,6 +102,7 @@ +@@ -101,6 +102,7 @@ static inline struct thread_info *current_thread_info(void) #define TIF_NEED_RESCHED 1 #define TIF_NOTIFY_RESUME 2 /* callback before returning to user */ #define TIF_FOREIGN_FPSTATE 3 /* CPU's FP state is not current's */ @@ -1099,7 +1699,7 @@ diff -Nur linux-4.1.26.orig/arch/arm64/include/asm/thread_info.h linux-4.1.26/ar #define TIF_NOHZ 7 #define TIF_SYSCALL_TRACE 8 #define TIF_SYSCALL_AUDIT 9 -@@ -117,6 +119,7 @@ +@@ -117,6 +119,7 @@ static inline struct thread_info *current_thread_info(void) #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) #define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME) #define _TIF_FOREIGN_FPSTATE (1 << TIF_FOREIGN_FPSTATE) @@ -1107,33 +1707,11 @@ diff -Nur linux-4.1.26.orig/arch/arm64/include/asm/thread_info.h linux-4.1.26/ar #define _TIF_NOHZ (1 << TIF_NOHZ) #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) #define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT) -diff -Nur linux-4.1.26.orig/arch/arm64/Kconfig linux-4.1.26/arch/arm64/Kconfig ---- linux-4.1.26.orig/arch/arm64/Kconfig 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/arm64/Kconfig 2016-06-19 15:30:54.923152195 +0200 -@@ -69,8 +69,10 @@ - select HAVE_PERF_REGS - select HAVE_PERF_USER_STACK_DUMP - select HAVE_RCU_TABLE_FREE -+ select HAVE_PREEMPT_LAZY - select HAVE_SYSCALL_TRACEPOINTS - select IRQ_DOMAIN -+ select IRQ_FORCED_THREADING - select MODULES_USE_ELF_RELA - select NO_BOOTMEM - select OF -@@ -599,7 +601,7 @@ - - config XEN - bool "Xen guest support on ARM64" -- depends on ARM64 && OF -+ depends on ARM64 && OF && !PREEMPT_RT_FULL - select SWIOTLB_XEN - help - Say Y if you want to run Linux in a Virtual Machine on Xen on ARM64. -diff -Nur linux-4.1.26.orig/arch/arm64/kernel/asm-offsets.c linux-4.1.26/arch/arm64/kernel/asm-offsets.c ---- linux-4.1.26.orig/arch/arm64/kernel/asm-offsets.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/arm64/kernel/asm-offsets.c 2016-06-19 15:30:54.923152195 +0200 -@@ -35,6 +35,7 @@ +diff --git a/arch/arm64/kernel/asm-offsets.c b/arch/arm64/kernel/asm-offsets.c +index 4106ac64f95e..21f4a79bda0a 100644 +--- a/arch/arm64/kernel/asm-offsets.c ++++ b/arch/arm64/kernel/asm-offsets.c +@@ -35,6 +35,7 @@ int main(void) BLANK(); DEFINE(TI_FLAGS, offsetof(struct thread_info, flags)); DEFINE(TI_PREEMPT, offsetof(struct thread_info, preempt_count)); @@ -1141,10 +1719,11 @@ diff -Nur linux-4.1.26.orig/arch/arm64/kernel/asm-offsets.c linux-4.1.26/arch/ar DEFINE(TI_ADDR_LIMIT, offsetof(struct thread_info, addr_limit)); DEFINE(TI_TASK, offsetof(struct thread_info, task)); DEFINE(TI_CPU, offsetof(struct thread_info, cpu)); -diff -Nur linux-4.1.26.orig/arch/arm64/kernel/entry.S linux-4.1.26/arch/arm64/kernel/entry.S ---- linux-4.1.26.orig/arch/arm64/kernel/entry.S 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/arm64/kernel/entry.S 2016-06-19 15:30:58.591293647 +0200 -@@ -367,11 +367,16 @@ +diff --git a/arch/arm64/kernel/entry.S b/arch/arm64/kernel/entry.S +index 05012cdb555f..7abfb48bd163 100644 +--- a/arch/arm64/kernel/entry.S ++++ b/arch/arm64/kernel/entry.S +@@ -380,11 +380,16 @@ el1_irq: #ifdef CONFIG_PREEMPT get_thread_info tsk ldr w24, [tsk, #TI_PREEMPT] // get preempt count @@ -1164,7 +1743,7 @@ diff -Nur linux-4.1.26.orig/arch/arm64/kernel/entry.S linux-4.1.26/arch/arm64/ke #endif #ifdef CONFIG_TRACE_IRQFLAGS bl trace_hardirqs_on -@@ -385,6 +390,7 @@ +@@ -398,6 +403,7 @@ el1_preempt: 1: bl preempt_schedule_irq // irq en/disable is done inside ldr x0, [tsk, #TI_FLAGS] // get new tasks TI_FLAGS tbnz x0, #TIF_NEED_RESCHED, 1b // needs rescheduling? @@ -1172,7 +1751,7 @@ diff -Nur linux-4.1.26.orig/arch/arm64/kernel/entry.S linux-4.1.26/arch/arm64/ke ret x24 #endif -@@ -622,6 +628,7 @@ +@@ -635,6 +641,7 @@ fast_work_pending: str x0, [sp, #S_X0] // returned x0 work_pending: tbnz x1, #TIF_NEED_RESCHED, work_resched @@ -1180,10 +1759,11 @@ diff -Nur linux-4.1.26.orig/arch/arm64/kernel/entry.S linux-4.1.26/arch/arm64/ke /* TIF_SIGPENDING, TIF_NOTIFY_RESUME or TIF_FOREIGN_FPSTATE case */ ldr x2, [sp, #S_PSTATE] mov x0, sp // 'regs' -diff -Nur linux-4.1.26.orig/arch/arm64/kernel/insn.c linux-4.1.26/arch/arm64/kernel/insn.c ---- linux-4.1.26.orig/arch/arm64/kernel/insn.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/arm64/kernel/insn.c 2016-06-19 15:30:58.595293802 +0200 -@@ -77,7 +77,7 @@ +diff --git a/arch/arm64/kernel/insn.c b/arch/arm64/kernel/insn.c +index 924902083e47..30eb88e5b896 100644 +--- a/arch/arm64/kernel/insn.c ++++ b/arch/arm64/kernel/insn.c +@@ -77,7 +77,7 @@ bool __kprobes aarch64_insn_is_nop(u32 insn) } } @@ -1192,7 +1772,7 @@ diff -Nur linux-4.1.26.orig/arch/arm64/kernel/insn.c linux-4.1.26/arch/arm64/ker static void __kprobes *patch_map(void *addr, int fixmap) { -@@ -124,13 +124,13 @@ +@@ -124,13 +124,13 @@ static int __kprobes __aarch64_insn_write(void *addr, u32 insn) unsigned long flags = 0; int ret; @@ -1208,10 +1788,11 @@ diff -Nur linux-4.1.26.orig/arch/arm64/kernel/insn.c linux-4.1.26/arch/arm64/ker return ret; } -diff -Nur linux-4.1.26.orig/arch/arm64/kernel/perf_event.c linux-4.1.26/arch/arm64/kernel/perf_event.c ---- linux-4.1.26.orig/arch/arm64/kernel/perf_event.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/arm64/kernel/perf_event.c 2016-06-19 15:30:58.595293802 +0200 -@@ -488,7 +488,7 @@ +diff --git a/arch/arm64/kernel/perf_event.c b/arch/arm64/kernel/perf_event.c +index b67b01cb5109..c4cb2596ede6 100644 +--- a/arch/arm64/kernel/perf_event.c ++++ b/arch/arm64/kernel/perf_event.c +@@ -488,7 +488,7 @@ armpmu_reserve_hardware(struct arm_pmu *armpmu) } err = request_irq(irq, armpmu->handle_irq, @@ -1220,10 +1801,11 @@ diff -Nur linux-4.1.26.orig/arch/arm64/kernel/perf_event.c linux-4.1.26/arch/arm "arm-pmu", armpmu); if (err) { pr_err("unable to request IRQ%d for ARM PMU counters\n", -diff -Nur linux-4.1.26.orig/arch/arm64/mm/fault.c linux-4.1.26/arch/arm64/mm/fault.c ---- linux-4.1.26.orig/arch/arm64/mm/fault.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/arm64/mm/fault.c 2016-06-19 15:30:58.595293802 +0200 -@@ -211,7 +211,7 @@ +diff --git a/arch/arm64/mm/fault.c b/arch/arm64/mm/fault.c +index fa5efaa5c3ac..1fdbb3704698 100644 +--- a/arch/arm64/mm/fault.c ++++ b/arch/arm64/mm/fault.c +@@ -211,7 +211,7 @@ static int __kprobes do_page_fault(unsigned long addr, unsigned int esr, * If we're in an interrupt or have no user context, we must not take * the fault. */ @@ -1232,10 +1814,11 @@ diff -Nur linux-4.1.26.orig/arch/arm64/mm/fault.c linux-4.1.26/arch/arm64/mm/fau goto no_context; if (user_mode(regs)) -diff -Nur linux-4.1.26.orig/arch/avr32/include/asm/uaccess.h linux-4.1.26/arch/avr32/include/asm/uaccess.h ---- linux-4.1.26.orig/arch/avr32/include/asm/uaccess.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/avr32/include/asm/uaccess.h 2016-06-19 15:30:58.595293802 +0200 -@@ -97,7 +97,8 @@ +diff --git a/arch/avr32/include/asm/uaccess.h b/arch/avr32/include/asm/uaccess.h +index 20b52c40bcd2..b1ec1fa06463 100644 +--- a/arch/avr32/include/asm/uaccess.h ++++ b/arch/avr32/include/asm/uaccess.h +@@ -106,7 +106,8 @@ static inline __kernel_size_t copy_from_user(void *to, * @x: Value to copy to user space. * @ptr: Destination address, in user space. * @@ -1245,7 +1828,7 @@ diff -Nur linux-4.1.26.orig/arch/avr32/include/asm/uaccess.h linux-4.1.26/arch/a * * This macro copies a single simple value from kernel space to user * space. It supports simple types like char and int, but not larger -@@ -116,7 +117,8 @@ +@@ -125,7 +126,8 @@ static inline __kernel_size_t copy_from_user(void *to, * @x: Variable to store result. * @ptr: Source address, in user space. * @@ -1255,7 +1838,7 @@ diff -Nur linux-4.1.26.orig/arch/avr32/include/asm/uaccess.h linux-4.1.26/arch/a * * This macro copies a single simple variable from user space to kernel * space. It supports simple types like char and int, but not larger -@@ -136,7 +138,8 @@ +@@ -145,7 +147,8 @@ static inline __kernel_size_t copy_from_user(void *to, * @x: Value to copy to user space. * @ptr: Destination address, in user space. * @@ -1265,7 +1848,7 @@ diff -Nur linux-4.1.26.orig/arch/avr32/include/asm/uaccess.h linux-4.1.26/arch/a * * This macro copies a single simple value from kernel space to user * space. It supports simple types like char and int, but not larger -@@ -158,7 +161,8 @@ +@@ -167,7 +170,8 @@ static inline __kernel_size_t copy_from_user(void *to, * @x: Variable to store result. * @ptr: Source address, in user space. * @@ -1275,9 +1858,10 @@ diff -Nur linux-4.1.26.orig/arch/avr32/include/asm/uaccess.h linux-4.1.26/arch/a * * This macro copies a single simple variable from user space to kernel * space. It supports simple types like char and int, but not larger -diff -Nur linux-4.1.26.orig/arch/avr32/mm/fault.c linux-4.1.26/arch/avr32/mm/fault.c ---- linux-4.1.26.orig/arch/avr32/mm/fault.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/avr32/mm/fault.c 2016-06-19 15:30:58.595293802 +0200 +diff --git a/arch/avr32/mm/fault.c b/arch/avr32/mm/fault.c +index d223a8b57c1e..c03533937a9f 100644 +--- a/arch/avr32/mm/fault.c ++++ b/arch/avr32/mm/fault.c @@ -14,11 +14,11 @@ #include <linux/pagemap.h> #include <linux/kdebug.h> @@ -1291,7 +1875,7 @@ diff -Nur linux-4.1.26.orig/arch/avr32/mm/fault.c linux-4.1.26/arch/avr32/mm/fau #ifdef CONFIG_KPROBES static inline int notify_page_fault(struct pt_regs *regs, int trap) -@@ -81,7 +81,7 @@ +@@ -81,7 +81,7 @@ asmlinkage void do_page_fault(unsigned long ecr, struct pt_regs *regs) * If we're in an interrupt or have no user context, we must * not take the fault... */ @@ -1300,9 +1884,10 @@ diff -Nur linux-4.1.26.orig/arch/avr32/mm/fault.c linux-4.1.26/arch/avr32/mm/fau goto no_context; local_irq_enable(); -diff -Nur linux-4.1.26.orig/arch/cris/mm/fault.c linux-4.1.26/arch/cris/mm/fault.c ---- linux-4.1.26.orig/arch/cris/mm/fault.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/cris/mm/fault.c 2016-06-19 15:30:58.595293802 +0200 +diff --git a/arch/cris/mm/fault.c b/arch/cris/mm/fault.c +index 83f12f2ed9e3..3066d40a6db1 100644 +--- a/arch/cris/mm/fault.c ++++ b/arch/cris/mm/fault.c @@ -8,7 +8,7 @@ #include <linux/interrupt.h> #include <linux/module.h> @@ -1312,7 +1897,7 @@ diff -Nur linux-4.1.26.orig/arch/cris/mm/fault.c linux-4.1.26/arch/cris/mm/fault #include <arch/system.h> extern int find_fixup_code(struct pt_regs *); -@@ -109,11 +109,11 @@ +@@ -109,11 +109,11 @@ do_page_fault(unsigned long address, struct pt_regs *regs, info.si_code = SEGV_MAPERR; /* @@ -1326,9 +1911,10 @@ diff -Nur linux-4.1.26.orig/arch/cris/mm/fault.c linux-4.1.26/arch/cris/mm/fault goto no_context; if (user_mode(regs)) -diff -Nur linux-4.1.26.orig/arch/frv/mm/fault.c linux-4.1.26/arch/frv/mm/fault.c ---- linux-4.1.26.orig/arch/frv/mm/fault.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/frv/mm/fault.c 2016-06-19 15:30:58.595293802 +0200 +diff --git a/arch/frv/mm/fault.c b/arch/frv/mm/fault.c +index ec4917ddf678..61d99767fe16 100644 +--- a/arch/frv/mm/fault.c ++++ b/arch/frv/mm/fault.c @@ -19,9 +19,9 @@ #include <linux/kernel.h> #include <linux/ptrace.h> @@ -1340,7 +1926,7 @@ diff -Nur linux-4.1.26.orig/arch/frv/mm/fault.c linux-4.1.26/arch/frv/mm/fault.c #include <asm/gdb-stub.h> /*****************************************************************************/ -@@ -78,7 +78,7 @@ +@@ -78,7 +78,7 @@ asmlinkage void do_page_fault(int datammu, unsigned long esr0, unsigned long ear * If we're in an interrupt or have no user * context, we must not take the fault.. */ @@ -1349,10 +1935,11 @@ diff -Nur linux-4.1.26.orig/arch/frv/mm/fault.c linux-4.1.26/arch/frv/mm/fault.c goto no_context; if (user_mode(__frame)) -diff -Nur linux-4.1.26.orig/arch/frv/mm/highmem.c linux-4.1.26/arch/frv/mm/highmem.c ---- linux-4.1.26.orig/arch/frv/mm/highmem.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/frv/mm/highmem.c 2016-06-19 15:30:58.595293802 +0200 -@@ -42,6 +42,7 @@ +diff --git a/arch/frv/mm/highmem.c b/arch/frv/mm/highmem.c +index bed9a9bd3c10..785344bbdc07 100644 +--- a/arch/frv/mm/highmem.c ++++ b/arch/frv/mm/highmem.c +@@ -42,6 +42,7 @@ void *kmap_atomic(struct page *page) unsigned long paddr; int type; @@ -1360,16 +1947,17 @@ diff -Nur linux-4.1.26.orig/arch/frv/mm/highmem.c linux-4.1.26/arch/frv/mm/highm pagefault_disable(); type = kmap_atomic_idx_push(); paddr = page_to_phys(page); -@@ -85,5 +86,6 @@ +@@ -85,5 +86,6 @@ void __kunmap_atomic(void *kvaddr) } kmap_atomic_idx_pop(); pagefault_enable(); + preempt_enable(); } EXPORT_SYMBOL(__kunmap_atomic); -diff -Nur linux-4.1.26.orig/arch/hexagon/include/asm/uaccess.h linux-4.1.26/arch/hexagon/include/asm/uaccess.h ---- linux-4.1.26.orig/arch/hexagon/include/asm/uaccess.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/hexagon/include/asm/uaccess.h 2016-06-19 15:30:58.595293802 +0200 +diff --git a/arch/hexagon/include/asm/uaccess.h b/arch/hexagon/include/asm/uaccess.h +index 25fc9049db8a..f61cfb28e9f2 100644 +--- a/arch/hexagon/include/asm/uaccess.h ++++ b/arch/hexagon/include/asm/uaccess.h @@ -36,7 +36,8 @@ * @addr: User space pointer to start of block to check * @size: Size of block to check @@ -1380,9 +1968,10 @@ diff -Nur linux-4.1.26.orig/arch/hexagon/include/asm/uaccess.h linux-4.1.26/arch * * Checks if a pointer to a block of memory in user space is valid. * -diff -Nur linux-4.1.26.orig/arch/ia64/mm/fault.c linux-4.1.26/arch/ia64/mm/fault.c ---- linux-4.1.26.orig/arch/ia64/mm/fault.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/ia64/mm/fault.c 2016-06-19 15:30:58.595293802 +0200 +diff --git a/arch/ia64/mm/fault.c b/arch/ia64/mm/fault.c +index ba5ba7accd0d..70b40d1205a6 100644 +--- a/arch/ia64/mm/fault.c ++++ b/arch/ia64/mm/fault.c @@ -11,10 +11,10 @@ #include <linux/kprobes.h> #include <linux/kdebug.h> @@ -1395,7 +1984,7 @@ diff -Nur linux-4.1.26.orig/arch/ia64/mm/fault.c linux-4.1.26/arch/ia64/mm/fault extern int die(char *, struct pt_regs *, long); -@@ -96,7 +96,7 @@ +@@ -96,7 +96,7 @@ ia64_do_page_fault (unsigned long address, unsigned long isr, struct pt_regs *re /* * If we're in an interrupt or have no user context, we must not take the fault.. */ @@ -1404,29 +1993,11 @@ diff -Nur linux-4.1.26.orig/arch/ia64/mm/fault.c linux-4.1.26/arch/ia64/mm/fault goto no_context; #ifdef CONFIG_VIRTUAL_MEM_MAP -diff -Nur linux-4.1.26.orig/arch/Kconfig linux-4.1.26/arch/Kconfig ---- linux-4.1.26.orig/arch/Kconfig 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/Kconfig 2016-06-19 15:30:54.915151887 +0200 -@@ -6,6 +6,7 @@ - tristate "OProfile system profiling" - depends on PROFILING - depends on HAVE_OPROFILE -+ depends on !PREEMPT_RT_FULL - select RING_BUFFER - select RING_BUFFER_ALLOW_SWAP - help -@@ -49,6 +50,7 @@ - config JUMP_LABEL - bool "Optimize very unlikely/likely branches" - depends on HAVE_ARCH_JUMP_LABEL -+ depends on (!INTERRUPT_OFF_HIST && !PREEMPT_OFF_HIST && !WAKEUP_LATENCY_HIST && !MISSED_TIMER_OFFSETS_HIST) - help - This option enables a transparent branch optimization that - makes certain almost-always-true or almost-always-false branch -diff -Nur linux-4.1.26.orig/arch/m32r/include/asm/uaccess.h linux-4.1.26/arch/m32r/include/asm/uaccess.h ---- linux-4.1.26.orig/arch/m32r/include/asm/uaccess.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/m32r/include/asm/uaccess.h 2016-06-19 15:30:58.595293802 +0200 -@@ -91,7 +91,8 @@ +diff --git a/arch/m32r/include/asm/uaccess.h b/arch/m32r/include/asm/uaccess.h +index c66a38d0a895..6f8982157a75 100644 +--- a/arch/m32r/include/asm/uaccess.h ++++ b/arch/m32r/include/asm/uaccess.h +@@ -91,7 +91,8 @@ static inline void set_fs(mm_segment_t s) * @addr: User space pointer to start of block to check * @size: Size of block to check * @@ -1436,7 +2007,7 @@ diff -Nur linux-4.1.26.orig/arch/m32r/include/asm/uaccess.h linux-4.1.26/arch/m3 * * Checks if a pointer to a block of memory in user space is valid. * -@@ -155,7 +156,8 @@ +@@ -155,7 +156,8 @@ extern int fixup_exception(struct pt_regs *regs); * @x: Variable to store result. * @ptr: Source address, in user space. * @@ -1446,7 +2017,7 @@ diff -Nur linux-4.1.26.orig/arch/m32r/include/asm/uaccess.h linux-4.1.26/arch/m3 * * This macro copies a single simple variable from user space to kernel * space. It supports simple types like char and int, but not larger -@@ -175,7 +177,8 @@ +@@ -175,7 +177,8 @@ extern int fixup_exception(struct pt_regs *regs); * @x: Value to copy to user space. * @ptr: Destination address, in user space. * @@ -1456,7 +2027,7 @@ diff -Nur linux-4.1.26.orig/arch/m32r/include/asm/uaccess.h linux-4.1.26/arch/m3 * * This macro copies a single simple value from kernel space to user * space. It supports simple types like char and int, but not larger -@@ -194,7 +197,8 @@ +@@ -194,7 +197,8 @@ extern int fixup_exception(struct pt_regs *regs); * @x: Variable to store result. * @ptr: Source address, in user space. * @@ -1466,7 +2037,7 @@ diff -Nur linux-4.1.26.orig/arch/m32r/include/asm/uaccess.h linux-4.1.26/arch/m3 * * This macro copies a single simple variable from user space to kernel * space. It supports simple types like char and int, but not larger -@@ -274,7 +278,8 @@ +@@ -274,7 +278,8 @@ do { \ * @x: Value to copy to user space. * @ptr: Destination address, in user space. * @@ -1476,7 +2047,7 @@ diff -Nur linux-4.1.26.orig/arch/m32r/include/asm/uaccess.h linux-4.1.26/arch/m3 * * This macro copies a single simple value from kernel space to user * space. It supports simple types like char and int, but not larger -@@ -568,7 +573,8 @@ +@@ -568,7 +573,8 @@ unsigned long __generic_copy_from_user(void *, const void __user *, unsigned lon * @from: Source address, in kernel space. * @n: Number of bytes to copy. * @@ -1486,7 +2057,7 @@ diff -Nur linux-4.1.26.orig/arch/m32r/include/asm/uaccess.h linux-4.1.26/arch/m3 * * Copy data from kernel space to user space. Caller must check * the specified block with access_ok() before calling this function. -@@ -588,7 +594,8 @@ +@@ -588,7 +594,8 @@ unsigned long __generic_copy_from_user(void *, const void __user *, unsigned lon * @from: Source address, in kernel space. * @n: Number of bytes to copy. * @@ -1496,7 +2067,7 @@ diff -Nur linux-4.1.26.orig/arch/m32r/include/asm/uaccess.h linux-4.1.26/arch/m3 * * Copy data from kernel space to user space. * -@@ -606,7 +613,8 @@ +@@ -606,7 +613,8 @@ unsigned long __generic_copy_from_user(void *, const void __user *, unsigned lon * @from: Source address, in user space. * @n: Number of bytes to copy. * @@ -1506,7 +2077,7 @@ diff -Nur linux-4.1.26.orig/arch/m32r/include/asm/uaccess.h linux-4.1.26/arch/m3 * * Copy data from user space to kernel space. Caller must check * the specified block with access_ok() before calling this function. -@@ -626,7 +634,8 @@ +@@ -626,7 +634,8 @@ unsigned long __generic_copy_from_user(void *, const void __user *, unsigned lon * @from: Source address, in user space. * @n: Number of bytes to copy. * @@ -1516,7 +2087,7 @@ diff -Nur linux-4.1.26.orig/arch/m32r/include/asm/uaccess.h linux-4.1.26/arch/m3 * * Copy data from user space to kernel space. * -@@ -677,7 +686,8 @@ +@@ -677,7 +686,8 @@ unsigned long clear_user(void __user *mem, unsigned long len); * strlen_user: - Get the size of a string in user space. * @str: The string to measure. * @@ -1526,9 +2097,10 @@ diff -Nur linux-4.1.26.orig/arch/m32r/include/asm/uaccess.h linux-4.1.26/arch/m3 * * Get the size of a NUL-terminated string in user space. * -diff -Nur linux-4.1.26.orig/arch/m32r/mm/fault.c linux-4.1.26/arch/m32r/mm/fault.c ---- linux-4.1.26.orig/arch/m32r/mm/fault.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/m32r/mm/fault.c 2016-06-19 15:30:58.595293802 +0200 +diff --git a/arch/m32r/mm/fault.c b/arch/m32r/mm/fault.c +index e3d4d4890104..8f9875b7933d 100644 +--- a/arch/m32r/mm/fault.c ++++ b/arch/m32r/mm/fault.c @@ -24,9 +24,9 @@ #include <linux/vt_kern.h> /* For unblank_screen() */ #include <linux/highmem.h> @@ -1540,7 +2112,7 @@ diff -Nur linux-4.1.26.orig/arch/m32r/mm/fault.c linux-4.1.26/arch/m32r/mm/fault #include <asm/hardirq.h> #include <asm/mmu_context.h> #include <asm/tlbflush.h> -@@ -111,10 +111,10 @@ +@@ -111,10 +111,10 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long error_code, mm = tsk->mm; /* @@ -1554,9 +2126,10 @@ diff -Nur linux-4.1.26.orig/arch/m32r/mm/fault.c linux-4.1.26/arch/m32r/mm/fault goto bad_area_nosemaphore; if (error_code & ACE_USERMODE) -diff -Nur linux-4.1.26.orig/arch/m68k/mm/fault.c linux-4.1.26/arch/m68k/mm/fault.c ---- linux-4.1.26.orig/arch/m68k/mm/fault.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/m68k/mm/fault.c 2016-06-19 15:30:58.595293802 +0200 +diff --git a/arch/m68k/mm/fault.c b/arch/m68k/mm/fault.c +index b2f04aee46ec..6a94cdd0c830 100644 +--- a/arch/m68k/mm/fault.c ++++ b/arch/m68k/mm/fault.c @@ -10,10 +10,10 @@ #include <linux/ptrace.h> #include <linux/interrupt.h> @@ -1569,7 +2142,7 @@ diff -Nur linux-4.1.26.orig/arch/m68k/mm/fault.c linux-4.1.26/arch/m68k/mm/fault #include <asm/pgalloc.h> extern void die_if_kernel(char *, struct pt_regs *, long); -@@ -81,7 +81,7 @@ +@@ -81,7 +81,7 @@ int do_page_fault(struct pt_regs *regs, unsigned long address, * If we're in an interrupt or have no user * context, we must not take the fault.. */ @@ -1578,10 +2151,11 @@ diff -Nur linux-4.1.26.orig/arch/m68k/mm/fault.c linux-4.1.26/arch/m68k/mm/fault goto no_context; if (user_mode(regs)) -diff -Nur linux-4.1.26.orig/arch/metag/mm/fault.c linux-4.1.26/arch/metag/mm/fault.c ---- linux-4.1.26.orig/arch/metag/mm/fault.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/metag/mm/fault.c 2016-06-19 15:30:58.595293802 +0200 -@@ -105,7 +105,7 @@ +diff --git a/arch/metag/mm/fault.c b/arch/metag/mm/fault.c +index 2de5dc695a87..f57edca63609 100644 +--- a/arch/metag/mm/fault.c ++++ b/arch/metag/mm/fault.c +@@ -105,7 +105,7 @@ int do_page_fault(struct pt_regs *regs, unsigned long address, mm = tsk->mm; @@ -1590,10 +2164,11 @@ diff -Nur linux-4.1.26.orig/arch/metag/mm/fault.c linux-4.1.26/arch/metag/mm/fau goto no_context; if (user_mode(regs)) -diff -Nur linux-4.1.26.orig/arch/metag/mm/highmem.c linux-4.1.26/arch/metag/mm/highmem.c ---- linux-4.1.26.orig/arch/metag/mm/highmem.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/metag/mm/highmem.c 2016-06-19 15:30:58.595293802 +0200 -@@ -43,7 +43,7 @@ +diff --git a/arch/metag/mm/highmem.c b/arch/metag/mm/highmem.c +index d71f621a2c0b..807f1b1c4e65 100644 +--- a/arch/metag/mm/highmem.c ++++ b/arch/metag/mm/highmem.c +@@ -43,7 +43,7 @@ void *kmap_atomic(struct page *page) unsigned long vaddr; int type; @@ -1602,7 +2177,7 @@ diff -Nur linux-4.1.26.orig/arch/metag/mm/highmem.c linux-4.1.26/arch/metag/mm/h pagefault_disable(); if (!PageHighMem(page)) return page_address(page); -@@ -82,6 +82,7 @@ +@@ -82,6 +82,7 @@ void __kunmap_atomic(void *kvaddr) } pagefault_enable(); @@ -1610,7 +2185,7 @@ diff -Nur linux-4.1.26.orig/arch/metag/mm/highmem.c linux-4.1.26/arch/metag/mm/h } EXPORT_SYMBOL(__kunmap_atomic); -@@ -95,6 +96,7 @@ +@@ -95,6 +96,7 @@ void *kmap_atomic_pfn(unsigned long pfn) unsigned long vaddr; int type; @@ -1618,10 +2193,11 @@ diff -Nur linux-4.1.26.orig/arch/metag/mm/highmem.c linux-4.1.26/arch/metag/mm/h pagefault_disable(); type = kmap_atomic_idx_push(); -diff -Nur linux-4.1.26.orig/arch/microblaze/include/asm/uaccess.h linux-4.1.26/arch/microblaze/include/asm/uaccess.h ---- linux-4.1.26.orig/arch/microblaze/include/asm/uaccess.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/microblaze/include/asm/uaccess.h 2016-06-19 15:30:58.595293802 +0200 -@@ -178,7 +178,8 @@ +diff --git a/arch/microblaze/include/asm/uaccess.h b/arch/microblaze/include/asm/uaccess.h +index 0c0a5cfbf79a..826676778094 100644 +--- a/arch/microblaze/include/asm/uaccess.h ++++ b/arch/microblaze/include/asm/uaccess.h +@@ -178,7 +178,8 @@ extern long __user_bad(void); * @x: Variable to store result. * @ptr: Source address, in user space. * @@ -1631,7 +2207,7 @@ diff -Nur linux-4.1.26.orig/arch/microblaze/include/asm/uaccess.h linux-4.1.26/a * * This macro copies a single simple variable from user space to kernel * space. It supports simple types like char and int, but not larger -@@ -290,7 +291,8 @@ +@@ -290,7 +291,8 @@ extern long __user_bad(void); * @x: Value to copy to user space. * @ptr: Destination address, in user space. * @@ -1641,10 +2217,11 @@ diff -Nur linux-4.1.26.orig/arch/microblaze/include/asm/uaccess.h linux-4.1.26/a * * This macro copies a single simple value from kernel space to user * space. It supports simple types like char and int, but not larger -diff -Nur linux-4.1.26.orig/arch/microblaze/mm/fault.c linux-4.1.26/arch/microblaze/mm/fault.c ---- linux-4.1.26.orig/arch/microblaze/mm/fault.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/microblaze/mm/fault.c 2016-06-19 15:30:58.595293802 +0200 -@@ -107,14 +107,14 @@ +diff --git a/arch/microblaze/mm/fault.c b/arch/microblaze/mm/fault.c +index d46a5ebb7570..177dfc003643 100644 +--- a/arch/microblaze/mm/fault.c ++++ b/arch/microblaze/mm/fault.c +@@ -107,14 +107,14 @@ void do_page_fault(struct pt_regs *regs, unsigned long address, if ((error_code & 0x13) == 0x13 || (error_code & 0x11) == 0x11) is_write = 0; @@ -1663,10 +2240,11 @@ diff -Nur linux-4.1.26.orig/arch/microblaze/mm/fault.c linux-4.1.26/arch/microbl pr_emerg("r15 = %lx MSR = %lx\n", regs->r15, regs->msr); die("Weird page fault", regs, SIGSEGV); -diff -Nur linux-4.1.26.orig/arch/microblaze/mm/highmem.c linux-4.1.26/arch/microblaze/mm/highmem.c ---- linux-4.1.26.orig/arch/microblaze/mm/highmem.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/microblaze/mm/highmem.c 2016-06-19 15:30:58.599293956 +0200 -@@ -37,7 +37,7 @@ +diff --git a/arch/microblaze/mm/highmem.c b/arch/microblaze/mm/highmem.c +index 5a92576fad92..2fcc5a52d84d 100644 +--- a/arch/microblaze/mm/highmem.c ++++ b/arch/microblaze/mm/highmem.c +@@ -37,7 +37,7 @@ void *kmap_atomic_prot(struct page *page, pgprot_t prot) unsigned long vaddr; int idx, type; @@ -1675,7 +2253,7 @@ diff -Nur linux-4.1.26.orig/arch/microblaze/mm/highmem.c linux-4.1.26/arch/micro pagefault_disable(); if (!PageHighMem(page)) return page_address(page); -@@ -63,6 +63,7 @@ +@@ -63,6 +63,7 @@ void __kunmap_atomic(void *kvaddr) if (vaddr < __fix_to_virt(FIX_KMAP_END)) { pagefault_enable(); @@ -1683,17 +2261,31 @@ diff -Nur linux-4.1.26.orig/arch/microblaze/mm/highmem.c linux-4.1.26/arch/micro return; } -@@ -84,5 +85,6 @@ +@@ -84,5 +85,6 @@ void __kunmap_atomic(void *kvaddr) #endif kmap_atomic_idx_pop(); pagefault_enable(); + preempt_enable(); } EXPORT_SYMBOL(__kunmap_atomic); -diff -Nur linux-4.1.26.orig/arch/mips/include/asm/uaccess.h linux-4.1.26/arch/mips/include/asm/uaccess.h ---- linux-4.1.26.orig/arch/mips/include/asm/uaccess.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/mips/include/asm/uaccess.h 2016-06-19 15:30:58.599293956 +0200 -@@ -103,7 +103,8 @@ +diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig +index c99e8a32bea4..7e6ab18c488a 100644 +--- a/arch/mips/Kconfig ++++ b/arch/mips/Kconfig +@@ -2367,7 +2367,7 @@ config CPU_R4400_WORKAROUNDS + # + config HIGHMEM + bool "High Memory Support" +- depends on 32BIT && CPU_SUPPORTS_HIGHMEM && SYS_SUPPORTS_HIGHMEM && !CPU_MIPS32_3_5_EVA ++ depends on 32BIT && CPU_SUPPORTS_HIGHMEM && SYS_SUPPORTS_HIGHMEM && !CPU_MIPS32_3_5_EVA && !PREEMPT_RT_FULL + + config CPU_SUPPORTS_HIGHMEM + bool +diff --git a/arch/mips/include/asm/uaccess.h b/arch/mips/include/asm/uaccess.h +index bc2f5164ce51..6dc7f5130d49 100644 +--- a/arch/mips/include/asm/uaccess.h ++++ b/arch/mips/include/asm/uaccess.h +@@ -104,7 +104,8 @@ extern u64 __ua_limit; * @addr: User space pointer to start of block to check * @size: Size of block to check * @@ -1703,7 +2295,7 @@ diff -Nur linux-4.1.26.orig/arch/mips/include/asm/uaccess.h linux-4.1.26/arch/mi * * Checks if a pointer to a block of memory in user space is valid. * -@@ -138,7 +139,8 @@ +@@ -139,7 +140,8 @@ extern u64 __ua_limit; * @x: Value to copy to user space. * @ptr: Destination address, in user space. * @@ -1713,7 +2305,7 @@ diff -Nur linux-4.1.26.orig/arch/mips/include/asm/uaccess.h linux-4.1.26/arch/mi * * This macro copies a single simple value from kernel space to user * space. It supports simple types like char and int, but not larger -@@ -157,7 +159,8 @@ +@@ -158,7 +160,8 @@ extern u64 __ua_limit; * @x: Variable to store result. * @ptr: Source address, in user space. * @@ -1723,7 +2315,7 @@ diff -Nur linux-4.1.26.orig/arch/mips/include/asm/uaccess.h linux-4.1.26/arch/mi * * This macro copies a single simple variable from user space to kernel * space. It supports simple types like char and int, but not larger -@@ -177,7 +180,8 @@ +@@ -178,7 +181,8 @@ extern u64 __ua_limit; * @x: Value to copy to user space. * @ptr: Destination address, in user space. * @@ -1733,7 +2325,7 @@ diff -Nur linux-4.1.26.orig/arch/mips/include/asm/uaccess.h linux-4.1.26/arch/mi * * This macro copies a single simple value from kernel space to user * space. It supports simple types like char and int, but not larger -@@ -199,7 +203,8 @@ +@@ -200,7 +204,8 @@ extern u64 __ua_limit; * @x: Variable to store result. * @ptr: Source address, in user space. * @@ -1743,7 +2335,7 @@ diff -Nur linux-4.1.26.orig/arch/mips/include/asm/uaccess.h linux-4.1.26/arch/mi * * This macro copies a single simple variable from user space to kernel * space. It supports simple types like char and int, but not larger -@@ -498,7 +503,8 @@ +@@ -499,7 +504,8 @@ extern void __put_user_unknown(void); * @x: Value to copy to user space. * @ptr: Destination address, in user space. * @@ -1753,7 +2345,7 @@ diff -Nur linux-4.1.26.orig/arch/mips/include/asm/uaccess.h linux-4.1.26/arch/mi * * This macro copies a single simple value from kernel space to user * space. It supports simple types like char and int, but not larger -@@ -517,7 +523,8 @@ +@@ -518,7 +524,8 @@ extern void __put_user_unknown(void); * @x: Variable to store result. * @ptr: Source address, in user space. * @@ -1763,7 +2355,7 @@ diff -Nur linux-4.1.26.orig/arch/mips/include/asm/uaccess.h linux-4.1.26/arch/mi * * This macro copies a single simple variable from user space to kernel * space. It supports simple types like char and int, but not larger -@@ -537,7 +544,8 @@ +@@ -538,7 +545,8 @@ extern void __put_user_unknown(void); * @x: Value to copy to user space. * @ptr: Destination address, in user space. * @@ -1773,7 +2365,7 @@ diff -Nur linux-4.1.26.orig/arch/mips/include/asm/uaccess.h linux-4.1.26/arch/mi * * This macro copies a single simple value from kernel space to user * space. It supports simple types like char and int, but not larger -@@ -559,7 +567,8 @@ +@@ -560,7 +568,8 @@ extern void __put_user_unknown(void); * @x: Variable to store result. * @ptr: Source address, in user space. * @@ -1783,7 +2375,7 @@ diff -Nur linux-4.1.26.orig/arch/mips/include/asm/uaccess.h linux-4.1.26/arch/mi * * This macro copies a single simple variable from user space to kernel * space. It supports simple types like char and int, but not larger -@@ -815,7 +824,8 @@ +@@ -816,7 +825,8 @@ extern size_t __copy_user(void *__to, const void *__from, size_t __n); * @from: Source address, in kernel space. * @n: Number of bytes to copy. * @@ -1793,7 +2385,7 @@ diff -Nur linux-4.1.26.orig/arch/mips/include/asm/uaccess.h linux-4.1.26/arch/mi * * Copy data from kernel space to user space. Caller must check * the specified block with access_ok() before calling this function. -@@ -888,7 +898,8 @@ +@@ -889,7 +899,8 @@ extern size_t __copy_user_inatomic(void *__to, const void *__from, size_t __n); * @from: Source address, in kernel space. * @n: Number of bytes to copy. * @@ -1803,7 +2395,7 @@ diff -Nur linux-4.1.26.orig/arch/mips/include/asm/uaccess.h linux-4.1.26/arch/mi * * Copy data from kernel space to user space. * -@@ -1075,7 +1086,8 @@ +@@ -1076,7 +1087,8 @@ extern size_t __copy_in_user_eva(void *__to, const void *__from, size_t __n); * @from: Source address, in user space. * @n: Number of bytes to copy. * @@ -1813,7 +2405,7 @@ diff -Nur linux-4.1.26.orig/arch/mips/include/asm/uaccess.h linux-4.1.26/arch/mi * * Copy data from user space to kernel space. Caller must check * the specified block with access_ok() before calling this function. -@@ -1107,7 +1119,8 @@ +@@ -1108,7 +1120,8 @@ extern size_t __copy_in_user_eva(void *__to, const void *__from, size_t __n); * @from: Source address, in user space. * @n: Number of bytes to copy. * @@ -1823,7 +2415,7 @@ diff -Nur linux-4.1.26.orig/arch/mips/include/asm/uaccess.h linux-4.1.26/arch/mi * * Copy data from user space to kernel space. * -@@ -1329,7 +1342,8 @@ +@@ -1332,7 +1345,8 @@ strncpy_from_user(char *__to, const char __user *__from, long __len) * strlen_user: - Get the size of a string in user space. * @str: The string to measure. * @@ -1833,7 +2425,7 @@ diff -Nur linux-4.1.26.orig/arch/mips/include/asm/uaccess.h linux-4.1.26/arch/mi * * Get the size of a NUL-terminated string in user space. * -@@ -1398,7 +1412,8 @@ +@@ -1401,7 +1415,8 @@ static inline long __strnlen_user(const char __user *s, long n) * strnlen_user: - Get the size of a string in user space. * @str: The string to measure. * @@ -1843,22 +2435,11 @@ diff -Nur linux-4.1.26.orig/arch/mips/include/asm/uaccess.h linux-4.1.26/arch/mi * * Get the size of a NUL-terminated string in user space. * -diff -Nur linux-4.1.26.orig/arch/mips/Kconfig linux-4.1.26/arch/mips/Kconfig ---- linux-4.1.26.orig/arch/mips/Kconfig 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/mips/Kconfig 2016-06-19 15:30:58.599293956 +0200 -@@ -2367,7 +2367,7 @@ - # - config HIGHMEM - bool "High Memory Support" -- depends on 32BIT && CPU_SUPPORTS_HIGHMEM && SYS_SUPPORTS_HIGHMEM && !CPU_MIPS32_3_5_EVA -+ depends on 32BIT && CPU_SUPPORTS_HIGHMEM && SYS_SUPPORTS_HIGHMEM && !CPU_MIPS32_3_5_EVA && !PREEMPT_RT_FULL - - config CPU_SUPPORTS_HIGHMEM - bool -diff -Nur linux-4.1.26.orig/arch/mips/kernel/signal-common.h linux-4.1.26/arch/mips/kernel/signal-common.h ---- linux-4.1.26.orig/arch/mips/kernel/signal-common.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/mips/kernel/signal-common.h 2016-06-19 15:30:58.599293956 +0200 -@@ -28,12 +28,7 @@ +diff --git a/arch/mips/kernel/signal-common.h b/arch/mips/kernel/signal-common.h +index 06805e09bcd3..0b85f827cd18 100644 +--- a/arch/mips/kernel/signal-common.h ++++ b/arch/mips/kernel/signal-common.h +@@ -28,12 +28,7 @@ extern void __user *get_sigframe(struct ksignal *ksig, struct pt_regs *regs, extern int fpcsr_pending(unsigned int __user *fpcsr); /* Make sure we will not lose FPU ownership */ @@ -1873,9 +2454,10 @@ diff -Nur linux-4.1.26.orig/arch/mips/kernel/signal-common.h linux-4.1.26/arch/m +#define unlock_fpu_owner() ({ pagefault_enable(); preempt_enable(); }) #endif /* __SIGNAL_COMMON_H */ -diff -Nur linux-4.1.26.orig/arch/mips/mm/fault.c linux-4.1.26/arch/mips/mm/fault.c ---- linux-4.1.26.orig/arch/mips/mm/fault.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/mips/mm/fault.c 2016-06-19 15:30:58.599293956 +0200 +diff --git a/arch/mips/mm/fault.c b/arch/mips/mm/fault.c +index 7ff8637e530d..36c0f26fac6b 100644 +--- a/arch/mips/mm/fault.c ++++ b/arch/mips/mm/fault.c @@ -21,10 +21,10 @@ #include <linux/module.h> #include <linux/kprobes.h> @@ -1888,7 +2470,7 @@ diff -Nur linux-4.1.26.orig/arch/mips/mm/fault.c linux-4.1.26/arch/mips/mm/fault #include <asm/ptrace.h> #include <asm/highmem.h> /* For VMALLOC_END */ #include <linux/kdebug.h> -@@ -94,7 +94,7 @@ +@@ -94,7 +94,7 @@ static void __kprobes __do_page_fault(struct pt_regs *regs, unsigned long write, * If we're in an interrupt or have no user * context, we must not take the fault.. */ @@ -1897,10 +2479,11 @@ diff -Nur linux-4.1.26.orig/arch/mips/mm/fault.c linux-4.1.26/arch/mips/mm/fault goto bad_area_nosemaphore; if (user_mode(regs)) -diff -Nur linux-4.1.26.orig/arch/mips/mm/highmem.c linux-4.1.26/arch/mips/mm/highmem.c ---- linux-4.1.26.orig/arch/mips/mm/highmem.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/mips/mm/highmem.c 2016-06-19 15:30:58.599293956 +0200 -@@ -47,7 +47,7 @@ +diff --git a/arch/mips/mm/highmem.c b/arch/mips/mm/highmem.c +index da815d295239..11661cbc11a8 100644 +--- a/arch/mips/mm/highmem.c ++++ b/arch/mips/mm/highmem.c +@@ -47,7 +47,7 @@ void *kmap_atomic(struct page *page) unsigned long vaddr; int idx, type; @@ -1909,7 +2492,7 @@ diff -Nur linux-4.1.26.orig/arch/mips/mm/highmem.c linux-4.1.26/arch/mips/mm/hig pagefault_disable(); if (!PageHighMem(page)) return page_address(page); -@@ -72,6 +72,7 @@ +@@ -72,6 +72,7 @@ void __kunmap_atomic(void *kvaddr) if (vaddr < FIXADDR_START) { // FIXME pagefault_enable(); @@ -1917,7 +2500,7 @@ diff -Nur linux-4.1.26.orig/arch/mips/mm/highmem.c linux-4.1.26/arch/mips/mm/hig return; } -@@ -92,6 +93,7 @@ +@@ -92,6 +93,7 @@ void __kunmap_atomic(void *kvaddr) #endif kmap_atomic_idx_pop(); pagefault_enable(); @@ -1925,7 +2508,7 @@ diff -Nur linux-4.1.26.orig/arch/mips/mm/highmem.c linux-4.1.26/arch/mips/mm/hig } EXPORT_SYMBOL(__kunmap_atomic); -@@ -104,6 +106,7 @@ +@@ -104,6 +106,7 @@ void *kmap_atomic_pfn(unsigned long pfn) unsigned long vaddr; int idx, type; @@ -1933,10 +2516,11 @@ diff -Nur linux-4.1.26.orig/arch/mips/mm/highmem.c linux-4.1.26/arch/mips/mm/hig pagefault_disable(); type = kmap_atomic_idx_push(); -diff -Nur linux-4.1.26.orig/arch/mips/mm/init.c linux-4.1.26/arch/mips/mm/init.c ---- linux-4.1.26.orig/arch/mips/mm/init.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/mips/mm/init.c 2016-06-19 15:30:58.599293956 +0200 -@@ -90,6 +90,7 @@ +diff --git a/arch/mips/mm/init.c b/arch/mips/mm/init.c +index faa5c9822ecc..198a3147dd7d 100644 +--- a/arch/mips/mm/init.c ++++ b/arch/mips/mm/init.c +@@ -90,6 +90,7 @@ static void *__kmap_pgprot(struct page *page, unsigned long addr, pgprot_t prot) BUG_ON(Page_dcache_dirty(page)); @@ -1944,7 +2528,7 @@ diff -Nur linux-4.1.26.orig/arch/mips/mm/init.c linux-4.1.26/arch/mips/mm/init.c pagefault_disable(); idx = (addr >> PAGE_SHIFT) & (FIX_N_COLOURS - 1); idx += in_interrupt() ? FIX_N_COLOURS : 0; -@@ -152,6 +153,7 @@ +@@ -152,6 +153,7 @@ void kunmap_coherent(void) write_c0_entryhi(old_ctx); local_irq_restore(flags); pagefault_enable(); @@ -1952,10 +2536,11 @@ diff -Nur linux-4.1.26.orig/arch/mips/mm/init.c linux-4.1.26/arch/mips/mm/init.c } void copy_user_highpage(struct page *to, struct page *from, -diff -Nur linux-4.1.26.orig/arch/mn10300/include/asm/highmem.h linux-4.1.26/arch/mn10300/include/asm/highmem.h ---- linux-4.1.26.orig/arch/mn10300/include/asm/highmem.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/mn10300/include/asm/highmem.h 2016-06-19 15:30:58.599293956 +0200 -@@ -75,6 +75,7 @@ +diff --git a/arch/mn10300/include/asm/highmem.h b/arch/mn10300/include/asm/highmem.h +index 2fbbe4d920aa..1ddea5afba09 100644 +--- a/arch/mn10300/include/asm/highmem.h ++++ b/arch/mn10300/include/asm/highmem.h +@@ -75,6 +75,7 @@ static inline void *kmap_atomic(struct page *page) unsigned long vaddr; int idx, type; @@ -1963,7 +2548,7 @@ diff -Nur linux-4.1.26.orig/arch/mn10300/include/asm/highmem.h linux-4.1.26/arch pagefault_disable(); if (page < highmem_start_page) return page_address(page); -@@ -98,6 +99,7 @@ +@@ -98,6 +99,7 @@ static inline void __kunmap_atomic(unsigned long vaddr) if (vaddr < FIXADDR_START) { /* FIXME */ pagefault_enable(); @@ -1971,7 +2556,7 @@ diff -Nur linux-4.1.26.orig/arch/mn10300/include/asm/highmem.h linux-4.1.26/arch return; } -@@ -122,6 +124,7 @@ +@@ -122,6 +124,7 @@ static inline void __kunmap_atomic(unsigned long vaddr) kmap_atomic_idx_pop(); pagefault_enable(); @@ -1979,9 +2564,10 @@ diff -Nur linux-4.1.26.orig/arch/mn10300/include/asm/highmem.h linux-4.1.26/arch } #endif /* __KERNEL__ */ -diff -Nur linux-4.1.26.orig/arch/mn10300/mm/fault.c linux-4.1.26/arch/mn10300/mm/fault.c ---- linux-4.1.26.orig/arch/mn10300/mm/fault.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/mn10300/mm/fault.c 2016-06-19 15:30:58.599293956 +0200 +diff --git a/arch/mn10300/mm/fault.c b/arch/mn10300/mm/fault.c +index 0c2cc5d39c8e..4a1d181ed32f 100644 +--- a/arch/mn10300/mm/fault.c ++++ b/arch/mn10300/mm/fault.c @@ -23,8 +23,8 @@ #include <linux/interrupt.h> #include <linux/init.h> @@ -1992,7 +2578,7 @@ diff -Nur linux-4.1.26.orig/arch/mn10300/mm/fault.c linux-4.1.26/arch/mn10300/mm #include <asm/pgalloc.h> #include <asm/hardirq.h> #include <asm/cpu-regs.h> -@@ -168,7 +168,7 @@ +@@ -168,7 +168,7 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long fault_code, * If we're in an interrupt or have no user * context, we must not take the fault.. */ @@ -2001,10 +2587,11 @@ diff -Nur linux-4.1.26.orig/arch/mn10300/mm/fault.c linux-4.1.26/arch/mn10300/mm goto no_context; if ((fault_code & MMUFCR_xFC_ACCESS) == MMUFCR_xFC_ACCESS_USR) -diff -Nur linux-4.1.26.orig/arch/nios2/mm/fault.c linux-4.1.26/arch/nios2/mm/fault.c ---- linux-4.1.26.orig/arch/nios2/mm/fault.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/nios2/mm/fault.c 2016-06-19 15:30:58.599293956 +0200 -@@ -77,7 +77,7 @@ +diff --git a/arch/nios2/mm/fault.c b/arch/nios2/mm/fault.c +index 0c9b6afe69e9..b51878b0c6b8 100644 +--- a/arch/nios2/mm/fault.c ++++ b/arch/nios2/mm/fault.c +@@ -77,7 +77,7 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long cause, * If we're in an interrupt or have no user * context, we must not take the fault.. */ @@ -2013,10 +2600,11 @@ diff -Nur linux-4.1.26.orig/arch/nios2/mm/fault.c linux-4.1.26/arch/nios2/mm/fau goto bad_area_nosemaphore; if (user_mode(regs)) -diff -Nur linux-4.1.26.orig/arch/parisc/include/asm/cacheflush.h linux-4.1.26/arch/parisc/include/asm/cacheflush.h ---- linux-4.1.26.orig/arch/parisc/include/asm/cacheflush.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/parisc/include/asm/cacheflush.h 2016-06-19 15:30:58.599293956 +0200 -@@ -142,6 +142,7 @@ +diff --git a/arch/parisc/include/asm/cacheflush.h b/arch/parisc/include/asm/cacheflush.h +index de65f66ea64e..ec2df4bab302 100644 +--- a/arch/parisc/include/asm/cacheflush.h ++++ b/arch/parisc/include/asm/cacheflush.h +@@ -142,6 +142,7 @@ static inline void kunmap(struct page *page) static inline void *kmap_atomic(struct page *page) { @@ -2024,7 +2612,7 @@ diff -Nur linux-4.1.26.orig/arch/parisc/include/asm/cacheflush.h linux-4.1.26/ar pagefault_disable(); return page_address(page); } -@@ -150,6 +151,7 @@ +@@ -150,6 +151,7 @@ static inline void __kunmap_atomic(void *addr) { flush_kernel_dcache_page_addr(addr); pagefault_enable(); @@ -2032,9 +2620,10 @@ diff -Nur linux-4.1.26.orig/arch/parisc/include/asm/cacheflush.h linux-4.1.26/ar } #define kmap_atomic_prot(page, prot) kmap_atomic(page) -diff -Nur linux-4.1.26.orig/arch/parisc/kernel/traps.c linux-4.1.26/arch/parisc/kernel/traps.c ---- linux-4.1.26.orig/arch/parisc/kernel/traps.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/parisc/kernel/traps.c 2016-06-19 15:30:58.599293956 +0200 +diff --git a/arch/parisc/kernel/traps.c b/arch/parisc/kernel/traps.c +index bbf22658d1a3..341966889a51 100644 +--- a/arch/parisc/kernel/traps.c ++++ b/arch/parisc/kernel/traps.c @@ -26,9 +26,9 @@ #include <linux/console.h> #include <linux/bug.h> @@ -2046,7 +2635,7 @@ diff -Nur linux-4.1.26.orig/arch/parisc/kernel/traps.c linux-4.1.26/arch/parisc/ #include <asm/io.h> #include <asm/irq.h> #include <asm/traps.h> -@@ -796,7 +796,7 @@ +@@ -796,7 +796,7 @@ void notrace handle_interruption(int code, struct pt_regs *regs) * unless pagefault_disable() was called before. */ @@ -2055,9 +2644,10 @@ diff -Nur linux-4.1.26.orig/arch/parisc/kernel/traps.c linux-4.1.26/arch/parisc/ { /* Clean up and return if in exception table. */ if (fixup_exception(regs)) -diff -Nur linux-4.1.26.orig/arch/parisc/mm/fault.c linux-4.1.26/arch/parisc/mm/fault.c ---- linux-4.1.26.orig/arch/parisc/mm/fault.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/parisc/mm/fault.c 2016-06-19 15:30:58.599293956 +0200 +diff --git a/arch/parisc/mm/fault.c b/arch/parisc/mm/fault.c +index 50d64a7fc672..3bc9db1ad19a 100644 +--- a/arch/parisc/mm/fault.c ++++ b/arch/parisc/mm/fault.c @@ -15,8 +15,8 @@ #include <linux/sched.h> #include <linux/interrupt.h> @@ -2068,7 +2658,7 @@ diff -Nur linux-4.1.26.orig/arch/parisc/mm/fault.c linux-4.1.26/arch/parisc/mm/f #include <asm/traps.h> /* Various important other fields */ -@@ -208,7 +208,7 @@ +@@ -208,7 +208,7 @@ void do_page_fault(struct pt_regs *regs, unsigned long code, int fault; unsigned int flags; @@ -2077,10 +2667,45 @@ diff -Nur linux-4.1.26.orig/arch/parisc/mm/fault.c linux-4.1.26/arch/parisc/mm/f goto no_context; tsk = current; -diff -Nur linux-4.1.26.orig/arch/powerpc/include/asm/kvm_host.h linux-4.1.26/arch/powerpc/include/asm/kvm_host.h ---- linux-4.1.26.orig/arch/powerpc/include/asm/kvm_host.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/powerpc/include/asm/kvm_host.h 2016-06-19 15:30:58.599293956 +0200 -@@ -280,7 +280,7 @@ +diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig +index 190cc48abc0c..7b70a5754e34 100644 +--- a/arch/powerpc/Kconfig ++++ b/arch/powerpc/Kconfig +@@ -60,10 +60,11 @@ config LOCKDEP_SUPPORT + + config RWSEM_GENERIC_SPINLOCK + bool ++ default y if PREEMPT_RT_FULL + + config RWSEM_XCHGADD_ALGORITHM + bool +- default y ++ default y if !PREEMPT_RT_FULL + + config GENERIC_LOCKBREAK + bool +@@ -138,6 +139,7 @@ config PPC + select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST + select GENERIC_STRNCPY_FROM_USER + select GENERIC_STRNLEN_USER ++ select HAVE_PREEMPT_LAZY + select HAVE_MOD_ARCH_SPECIFIC + select MODULES_USE_ELF_RELA + select CLONE_BACKWARDS +@@ -312,7 +314,7 @@ menu "Kernel options" + + config HIGHMEM + bool "High memory support" +- depends on PPC32 ++ depends on PPC32 && !PREEMPT_RT_FULL + + source kernel/Kconfig.hz + source kernel/Kconfig.preempt +diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h +index a193a13cf08b..a1ddf4080e1a 100644 +--- a/arch/powerpc/include/asm/kvm_host.h ++++ b/arch/powerpc/include/asm/kvm_host.h +@@ -280,7 +280,7 @@ struct kvmppc_vcore { u8 in_guest; struct list_head runnable_threads; spinlock_t lock; @@ -2089,7 +2714,7 @@ diff -Nur linux-4.1.26.orig/arch/powerpc/include/asm/kvm_host.h linux-4.1.26/arc spinlock_t stoltb_lock; /* protects stolen_tb and preempt_tb */ u64 stolen_tb; u64 preempt_tb; -@@ -613,7 +613,7 @@ +@@ -613,7 +613,7 @@ struct kvm_vcpu_arch { u8 prodded; u32 last_inst; @@ -2098,10 +2723,11 @@ diff -Nur linux-4.1.26.orig/arch/powerpc/include/asm/kvm_host.h linux-4.1.26/arc struct kvmppc_vcore *vcore; int ret; int trap; -diff -Nur linux-4.1.26.orig/arch/powerpc/include/asm/thread_info.h linux-4.1.26/arch/powerpc/include/asm/thread_info.h ---- linux-4.1.26.orig/arch/powerpc/include/asm/thread_info.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/powerpc/include/asm/thread_info.h 2016-06-19 15:30:58.603294110 +0200 -@@ -42,6 +42,8 @@ +diff --git a/arch/powerpc/include/asm/thread_info.h b/arch/powerpc/include/asm/thread_info.h +index 7efee4a3240b..40e6fa1b85b2 100644 +--- a/arch/powerpc/include/asm/thread_info.h ++++ b/arch/powerpc/include/asm/thread_info.h +@@ -42,6 +42,8 @@ struct thread_info { int cpu; /* cpu we're on */ int preempt_count; /* 0 => preemptable, <0 => BUG */ @@ -2110,7 +2736,7 @@ diff -Nur linux-4.1.26.orig/arch/powerpc/include/asm/thread_info.h linux-4.1.26/ unsigned long local_flags; /* private flags for thread */ /* low level flags - has atomic operations done on it */ -@@ -82,8 +84,7 @@ +@@ -82,8 +84,7 @@ static inline struct thread_info *current_thread_info(void) #define TIF_SYSCALL_TRACE 0 /* syscall trace active */ #define TIF_SIGPENDING 1 /* signal pending */ #define TIF_NEED_RESCHED 2 /* rescheduling necessary */ @@ -2120,7 +2746,7 @@ diff -Nur linux-4.1.26.orig/arch/powerpc/include/asm/thread_info.h linux-4.1.26/ #define TIF_32BIT 4 /* 32 bit binary */ #define TIF_RESTORE_TM 5 /* need to restore TM FP/VEC/VSX */ #define TIF_SYSCALL_AUDIT 7 /* syscall auditing active */ -@@ -101,6 +102,8 @@ +@@ -101,6 +102,8 @@ static inline struct thread_info *current_thread_info(void) #if defined(CONFIG_PPC64) #define TIF_ELF2ABI 18 /* function descriptors must die! */ #endif @@ -2129,7 +2755,7 @@ diff -Nur linux-4.1.26.orig/arch/powerpc/include/asm/thread_info.h linux-4.1.26/ /* as above, but as bit values */ #define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE) -@@ -119,14 +122,16 @@ +@@ -119,14 +122,16 @@ static inline struct thread_info *current_thread_info(void) #define _TIF_SYSCALL_TRACEPOINT (1<<TIF_SYSCALL_TRACEPOINT) #define _TIF_EMULATE_STACK_STORE (1<<TIF_EMULATE_STACK_STORE) #define _TIF_NOHZ (1<<TIF_NOHZ) @@ -2147,43 +2773,11 @@ diff -Nur linux-4.1.26.orig/arch/powerpc/include/asm/thread_info.h linux-4.1.26/ /* Bits in local_flags */ /* Don't move TLF_NAPPING without adjusting the code in entry_32.S */ -diff -Nur linux-4.1.26.orig/arch/powerpc/Kconfig linux-4.1.26/arch/powerpc/Kconfig ---- linux-4.1.26.orig/arch/powerpc/Kconfig 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/powerpc/Kconfig 2016-06-19 15:30:58.599293956 +0200 -@@ -60,10 +60,11 @@ - - config RWSEM_GENERIC_SPINLOCK - bool -+ default y if PREEMPT_RT_FULL - - config RWSEM_XCHGADD_ALGORITHM - bool -- default y -+ default y if !PREEMPT_RT_FULL - - config GENERIC_LOCKBREAK - bool -@@ -138,6 +139,7 @@ - select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST - select GENERIC_STRNCPY_FROM_USER - select GENERIC_STRNLEN_USER -+ select HAVE_PREEMPT_LAZY - select HAVE_MOD_ARCH_SPECIFIC - select MODULES_USE_ELF_RELA - select CLONE_BACKWARDS -@@ -312,7 +314,7 @@ - - config HIGHMEM - bool "High memory support" -- depends on PPC32 -+ depends on PPC32 && !PREEMPT_RT_FULL - - source kernel/Kconfig.hz - source kernel/Kconfig.preempt -diff -Nur linux-4.1.26.orig/arch/powerpc/kernel/asm-offsets.c linux-4.1.26/arch/powerpc/kernel/asm-offsets.c ---- linux-4.1.26.orig/arch/powerpc/kernel/asm-offsets.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/powerpc/kernel/asm-offsets.c 2016-06-19 15:30:58.603294110 +0200 -@@ -160,6 +160,7 @@ +diff --git a/arch/powerpc/kernel/asm-offsets.c b/arch/powerpc/kernel/asm-offsets.c +index 0034b6b3556a..65cc771661c4 100644 +--- a/arch/powerpc/kernel/asm-offsets.c ++++ b/arch/powerpc/kernel/asm-offsets.c +@@ -160,6 +160,7 @@ int main(void) DEFINE(TI_FLAGS, offsetof(struct thread_info, flags)); DEFINE(TI_LOCAL_FLAGS, offsetof(struct thread_info, local_flags)); DEFINE(TI_PREEMPT, offsetof(struct thread_info, preempt_count)); @@ -2191,10 +2785,11 @@ diff -Nur linux-4.1.26.orig/arch/powerpc/kernel/asm-offsets.c linux-4.1.26/arch/ DEFINE(TI_TASK, offsetof(struct thread_info, task)); DEFINE(TI_CPU, offsetof(struct thread_info, cpu)); -diff -Nur linux-4.1.26.orig/arch/powerpc/kernel/entry_32.S linux-4.1.26/arch/powerpc/kernel/entry_32.S ---- linux-4.1.26.orig/arch/powerpc/kernel/entry_32.S 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/powerpc/kernel/entry_32.S 2016-06-19 15:30:58.603294110 +0200 -@@ -813,7 +813,14 @@ +diff --git a/arch/powerpc/kernel/entry_32.S b/arch/powerpc/kernel/entry_32.S +index 46fc0f4d8982..3d390ac490d9 100644 +--- a/arch/powerpc/kernel/entry_32.S ++++ b/arch/powerpc/kernel/entry_32.S +@@ -813,7 +813,14 @@ resume_kernel: cmpwi 0,r0,0 /* if non-zero, just restore regs and return */ bne restore andi. r8,r8,_TIF_NEED_RESCHED @@ -2209,7 +2804,7 @@ diff -Nur linux-4.1.26.orig/arch/powerpc/kernel/entry_32.S linux-4.1.26/arch/pow lwz r3,_MSR(r1) andi. r0,r3,MSR_EE /* interrupts off? */ beq restore /* don't schedule if so */ -@@ -824,11 +831,11 @@ +@@ -824,11 +831,11 @@ resume_kernel: */ bl trace_hardirqs_off #endif @@ -2224,7 +2819,7 @@ diff -Nur linux-4.1.26.orig/arch/powerpc/kernel/entry_32.S linux-4.1.26/arch/pow #ifdef CONFIG_TRACE_IRQFLAGS /* And now, to properly rebalance the above, we tell lockdep they * are being turned back on, which will happen when we return -@@ -1149,7 +1156,7 @@ +@@ -1149,7 +1156,7 @@ global_dbcr0: #endif /* !(CONFIG_4xx || CONFIG_BOOKE) */ do_work: /* r10 contains MSR_KERNEL here */ @@ -2233,7 +2828,7 @@ diff -Nur linux-4.1.26.orig/arch/powerpc/kernel/entry_32.S linux-4.1.26/arch/pow beq do_user_signal do_resched: /* r10 contains MSR_KERNEL here */ -@@ -1170,7 +1177,7 @@ +@@ -1170,7 +1177,7 @@ recheck: MTMSRD(r10) /* disable interrupts */ CURRENT_THREAD_INFO(r9, r1) lwz r9,TI_FLAGS(r9) @@ -2242,10 +2837,11 @@ diff -Nur linux-4.1.26.orig/arch/powerpc/kernel/entry_32.S linux-4.1.26/arch/pow bne- do_resched andi. r0,r9,_TIF_USER_WORK_MASK beq restore_user -diff -Nur linux-4.1.26.orig/arch/powerpc/kernel/entry_64.S linux-4.1.26/arch/powerpc/kernel/entry_64.S ---- linux-4.1.26.orig/arch/powerpc/kernel/entry_64.S 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/powerpc/kernel/entry_64.S 2016-06-19 15:30:58.603294110 +0200 -@@ -636,7 +636,7 @@ +diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S +index afbc20019c2e..5e2d2645d1e0 100644 +--- a/arch/powerpc/kernel/entry_64.S ++++ b/arch/powerpc/kernel/entry_64.S +@@ -636,7 +636,7 @@ _GLOBAL(ret_from_except_lite) #else beq restore #endif @@ -2254,7 +2850,7 @@ diff -Nur linux-4.1.26.orig/arch/powerpc/kernel/entry_64.S linux-4.1.26/arch/pow beq 2f bl restore_interrupts SCHEDULE_USER -@@ -698,10 +698,18 @@ +@@ -698,10 +698,18 @@ resume_kernel: #ifdef CONFIG_PREEMPT /* Check if we need to preempt */ @@ -2274,7 +2870,7 @@ diff -Nur linux-4.1.26.orig/arch/powerpc/kernel/entry_64.S linux-4.1.26/arch/pow cmpwi cr1,r8,0 ld r0,SOFTE(r1) cmpdi r0,0 -@@ -718,7 +726,7 @@ +@@ -718,7 +726,7 @@ resume_kernel: /* Re-test flags and eventually loop */ CURRENT_THREAD_INFO(r9, r1) ld r4,TI_FLAGS(r9) @@ -2283,10 +2879,11 @@ diff -Nur linux-4.1.26.orig/arch/powerpc/kernel/entry_64.S linux-4.1.26/arch/pow bne 1b /* -diff -Nur linux-4.1.26.orig/arch/powerpc/kernel/irq.c linux-4.1.26/arch/powerpc/kernel/irq.c ---- linux-4.1.26.orig/arch/powerpc/kernel/irq.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/powerpc/kernel/irq.c 2016-06-19 15:30:58.603294110 +0200 -@@ -614,6 +614,7 @@ +diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c +index 45096033d37b..6a8e55a17683 100644 +--- a/arch/powerpc/kernel/irq.c ++++ b/arch/powerpc/kernel/irq.c +@@ -614,6 +614,7 @@ void irq_ctx_init(void) } } @@ -2294,7 +2891,7 @@ diff -Nur linux-4.1.26.orig/arch/powerpc/kernel/irq.c linux-4.1.26/arch/powerpc/ void do_softirq_own_stack(void) { struct thread_info *curtp, *irqtp; -@@ -631,6 +632,7 @@ +@@ -631,6 +632,7 @@ void do_softirq_own_stack(void) if (irqtp->flags) set_bits(irqtp->flags, &curtp->flags); } @@ -2302,9 +2899,10 @@ diff -Nur linux-4.1.26.orig/arch/powerpc/kernel/irq.c linux-4.1.26/arch/powerpc/ irq_hw_number_t virq_to_hw(unsigned int virq) { -diff -Nur linux-4.1.26.orig/arch/powerpc/kernel/misc_32.S linux-4.1.26/arch/powerpc/kernel/misc_32.S ---- linux-4.1.26.orig/arch/powerpc/kernel/misc_32.S 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/powerpc/kernel/misc_32.S 2016-06-19 15:30:58.603294110 +0200 +diff --git a/arch/powerpc/kernel/misc_32.S b/arch/powerpc/kernel/misc_32.S +index 7c6bb4b17b49..e9dfe2270e93 100644 +--- a/arch/powerpc/kernel/misc_32.S ++++ b/arch/powerpc/kernel/misc_32.S @@ -40,6 +40,7 @@ * We store the saved ksp_limit in the unused part * of the STACK_FRAME_OVERHEAD @@ -2313,7 +2911,7 @@ diff -Nur linux-4.1.26.orig/arch/powerpc/kernel/misc_32.S linux-4.1.26/arch/powe _GLOBAL(call_do_softirq) mflr r0 stw r0,4(r1) -@@ -56,6 +57,7 @@ +@@ -56,6 +57,7 @@ _GLOBAL(call_do_softirq) stw r10,THREAD+KSP_LIMIT(r2) mtlr r0 blr @@ -2321,9 +2919,10 @@ diff -Nur linux-4.1.26.orig/arch/powerpc/kernel/misc_32.S linux-4.1.26/arch/powe /* * void call_do_irq(struct pt_regs *regs, struct thread_info *irqtp); -diff -Nur linux-4.1.26.orig/arch/powerpc/kernel/misc_64.S linux-4.1.26/arch/powerpc/kernel/misc_64.S ---- linux-4.1.26.orig/arch/powerpc/kernel/misc_64.S 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/powerpc/kernel/misc_64.S 2016-06-19 15:30:58.603294110 +0200 +diff --git a/arch/powerpc/kernel/misc_64.S b/arch/powerpc/kernel/misc_64.S +index 4e314b90c75d..8a7238dd2f4b 100644 +--- a/arch/powerpc/kernel/misc_64.S ++++ b/arch/powerpc/kernel/misc_64.S @@ -29,6 +29,7 @@ .text @@ -2332,7 +2931,7 @@ diff -Nur linux-4.1.26.orig/arch/powerpc/kernel/misc_64.S linux-4.1.26/arch/powe _GLOBAL(call_do_softirq) mflr r0 std r0,16(r1) -@@ -39,6 +40,7 @@ +@@ -39,6 +40,7 @@ _GLOBAL(call_do_softirq) ld r0,16(r1) mtlr r0 blr @@ -2340,10 +2939,23 @@ diff -Nur linux-4.1.26.orig/arch/powerpc/kernel/misc_64.S linux-4.1.26/arch/powe _GLOBAL(call_do_irq) mflr r0 -diff -Nur linux-4.1.26.orig/arch/powerpc/kvm/book3s_hv.c linux-4.1.26/arch/powerpc/kvm/book3s_hv.c ---- linux-4.1.26.orig/arch/powerpc/kvm/book3s_hv.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/powerpc/kvm/book3s_hv.c 2016-06-19 15:30:58.603294110 +0200 -@@ -115,11 +115,11 @@ +diff --git a/arch/powerpc/kvm/Kconfig b/arch/powerpc/kvm/Kconfig +index 3caec2c42105..d4c48506ea1b 100644 +--- a/arch/powerpc/kvm/Kconfig ++++ b/arch/powerpc/kvm/Kconfig +@@ -172,6 +172,7 @@ config KVM_E500MC + config KVM_MPIC + bool "KVM in-kernel MPIC emulation" + depends on KVM && E500 ++ depends on !PREEMPT_RT_FULL + select HAVE_KVM_IRQCHIP + select HAVE_KVM_IRQFD + select HAVE_KVM_IRQ_ROUTING +diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c +index f5b3de7f7fa2..c3f43a405b58 100644 +--- a/arch/powerpc/kvm/book3s_hv.c ++++ b/arch/powerpc/kvm/book3s_hv.c +@@ -115,11 +115,11 @@ static bool kvmppc_ipi_thread(int cpu) static void kvmppc_fast_vcpu_kick_hv(struct kvm_vcpu *vcpu) { int cpu = vcpu->cpu; @@ -2358,7 +2970,7 @@ diff -Nur linux-4.1.26.orig/arch/powerpc/kvm/book3s_hv.c linux-4.1.26/arch/power ++vcpu->stat.halt_wakeup; } -@@ -692,8 +692,8 @@ +@@ -692,8 +692,8 @@ int kvmppc_pseries_do_hcall(struct kvm_vcpu *vcpu) tvcpu->arch.prodded = 1; smp_mb(); if (vcpu->arch.ceded) { @@ -2369,7 +2981,7 @@ diff -Nur linux-4.1.26.orig/arch/powerpc/kvm/book3s_hv.c linux-4.1.26/arch/power vcpu->stat.halt_wakeup++; } } -@@ -1432,7 +1432,7 @@ +@@ -1432,7 +1432,7 @@ static struct kvmppc_vcore *kvmppc_vcore_create(struct kvm *kvm, int core) INIT_LIST_HEAD(&vcore->runnable_threads); spin_lock_init(&vcore->lock); spin_lock_init(&vcore->stoltb_lock); @@ -2378,7 +2990,7 @@ diff -Nur linux-4.1.26.orig/arch/powerpc/kvm/book3s_hv.c linux-4.1.26/arch/power vcore->preempt_tb = TB_NIL; vcore->lpcr = kvm->arch.lpcr; vcore->first_vcpuid = core * threads_per_subcore; -@@ -2079,10 +2079,9 @@ +@@ -2079,10 +2079,9 @@ static void kvmppc_vcore_blocked(struct kvmppc_vcore *vc) { struct kvm_vcpu *vcpu; int do_sleep = 1; @@ -2391,7 +3003,7 @@ diff -Nur linux-4.1.26.orig/arch/powerpc/kvm/book3s_hv.c linux-4.1.26/arch/power /* * Check one last time for pending exceptions and ceded state after -@@ -2096,7 +2095,7 @@ +@@ -2096,7 +2095,7 @@ static void kvmppc_vcore_blocked(struct kvmppc_vcore *vc) } if (!do_sleep) { @@ -2400,7 +3012,7 @@ diff -Nur linux-4.1.26.orig/arch/powerpc/kvm/book3s_hv.c linux-4.1.26/arch/power return; } -@@ -2104,7 +2103,7 @@ +@@ -2104,7 +2103,7 @@ static void kvmppc_vcore_blocked(struct kvmppc_vcore *vc) trace_kvmppc_vcore_blocked(vc, 0); spin_unlock(&vc->lock); schedule(); @@ -2409,7 +3021,7 @@ diff -Nur linux-4.1.26.orig/arch/powerpc/kvm/book3s_hv.c linux-4.1.26/arch/power spin_lock(&vc->lock); vc->vcore_state = VCORE_INACTIVE; trace_kvmppc_vcore_blocked(vc, 1); -@@ -2148,7 +2147,7 @@ +@@ -2148,7 +2147,7 @@ static int kvmppc_run_vcpu(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu) kvmppc_start_thread(vcpu); trace_kvm_guest_enter(vcpu); } else if (vc->vcore_state == VCORE_SLEEPING) { @@ -2418,20 +3030,10 @@ diff -Nur linux-4.1.26.orig/arch/powerpc/kvm/book3s_hv.c linux-4.1.26/arch/power } } -diff -Nur linux-4.1.26.orig/arch/powerpc/kvm/Kconfig linux-4.1.26/arch/powerpc/kvm/Kconfig ---- linux-4.1.26.orig/arch/powerpc/kvm/Kconfig 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/powerpc/kvm/Kconfig 2016-06-19 15:30:58.603294110 +0200 -@@ -172,6 +172,7 @@ - config KVM_MPIC - bool "KVM in-kernel MPIC emulation" - depends on KVM && E500 -+ depends on !PREEMPT_RT_FULL - select HAVE_KVM_IRQCHIP - select HAVE_KVM_IRQFD - select HAVE_KVM_IRQ_ROUTING -diff -Nur linux-4.1.26.orig/arch/powerpc/mm/fault.c linux-4.1.26/arch/powerpc/mm/fault.c ---- linux-4.1.26.orig/arch/powerpc/mm/fault.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/powerpc/mm/fault.c 2016-06-19 15:30:58.603294110 +0200 +diff --git a/arch/powerpc/mm/fault.c b/arch/powerpc/mm/fault.c +index b396868d2aa7..6d535973b200 100644 +--- a/arch/powerpc/mm/fault.c ++++ b/arch/powerpc/mm/fault.c @@ -33,13 +33,13 @@ #include <linux/ratelimit.h> #include <linux/context_tracking.h> @@ -2447,7 +3049,7 @@ diff -Nur linux-4.1.26.orig/arch/powerpc/mm/fault.c linux-4.1.26/arch/powerpc/mm #include <asm/tlbflush.h> #include <asm/siginfo.h> #include <asm/debug.h> -@@ -272,15 +272,16 @@ +@@ -272,15 +272,16 @@ int __kprobes do_page_fault(struct pt_regs *regs, unsigned long address, if (!arch_irq_disabled_regs(regs)) local_irq_enable(); @@ -2467,10 +3069,11 @@ diff -Nur linux-4.1.26.orig/arch/powerpc/mm/fault.c linux-4.1.26/arch/powerpc/mm printk(KERN_EMERG "NIP = %lx MSR = %lx\n", regs->nip, regs->msr); die("Weird page fault", regs, SIGSEGV); -diff -Nur linux-4.1.26.orig/arch/powerpc/mm/highmem.c linux-4.1.26/arch/powerpc/mm/highmem.c ---- linux-4.1.26.orig/arch/powerpc/mm/highmem.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/powerpc/mm/highmem.c 2016-06-19 15:30:58.603294110 +0200 -@@ -34,7 +34,7 @@ +diff --git a/arch/powerpc/mm/highmem.c b/arch/powerpc/mm/highmem.c +index e7450bdbe83a..e292c8a60952 100644 +--- a/arch/powerpc/mm/highmem.c ++++ b/arch/powerpc/mm/highmem.c +@@ -34,7 +34,7 @@ void *kmap_atomic_prot(struct page *page, pgprot_t prot) unsigned long vaddr; int idx, type; @@ -2479,7 +3082,7 @@ diff -Nur linux-4.1.26.orig/arch/powerpc/mm/highmem.c linux-4.1.26/arch/powerpc/ pagefault_disable(); if (!PageHighMem(page)) return page_address(page); -@@ -59,6 +59,7 @@ +@@ -59,6 +59,7 @@ void __kunmap_atomic(void *kvaddr) if (vaddr < __fix_to_virt(FIX_KMAP_END)) { pagefault_enable(); @@ -2487,17 +3090,18 @@ diff -Nur linux-4.1.26.orig/arch/powerpc/mm/highmem.c linux-4.1.26/arch/powerpc/ return; } -@@ -82,5 +83,6 @@ +@@ -82,5 +83,6 @@ void __kunmap_atomic(void *kvaddr) kmap_atomic_idx_pop(); pagefault_enable(); + preempt_enable(); } EXPORT_SYMBOL(__kunmap_atomic); -diff -Nur linux-4.1.26.orig/arch/powerpc/platforms/ps3/device-init.c linux-4.1.26/arch/powerpc/platforms/ps3/device-init.c ---- linux-4.1.26.orig/arch/powerpc/platforms/ps3/device-init.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/powerpc/platforms/ps3/device-init.c 2016-06-19 15:30:58.603294110 +0200 -@@ -752,7 +752,7 @@ +diff --git a/arch/powerpc/platforms/ps3/device-init.c b/arch/powerpc/platforms/ps3/device-init.c +index 3f175e8aedb4..c4c02f91904c 100644 +--- a/arch/powerpc/platforms/ps3/device-init.c ++++ b/arch/powerpc/platforms/ps3/device-init.c +@@ -752,7 +752,7 @@ static int ps3_notification_read_write(struct ps3_notification_device *dev, } pr_debug("%s:%u: notification %s issued\n", __func__, __LINE__, op); @@ -2506,10 +3110,11 @@ diff -Nur linux-4.1.26.orig/arch/powerpc/platforms/ps3/device-init.c linux-4.1.2 dev->done.done || kthread_should_stop()); if (kthread_should_stop()) res = -EINTR; -diff -Nur linux-4.1.26.orig/arch/s390/include/asm/kvm_host.h linux-4.1.26/arch/s390/include/asm/kvm_host.h ---- linux-4.1.26.orig/arch/s390/include/asm/kvm_host.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/s390/include/asm/kvm_host.h 2016-06-19 15:30:58.603294110 +0200 -@@ -419,7 +419,7 @@ +diff --git a/arch/s390/include/asm/kvm_host.h b/arch/s390/include/asm/kvm_host.h +index d01fc588b5c3..905007eead88 100644 +--- a/arch/s390/include/asm/kvm_host.h ++++ b/arch/s390/include/asm/kvm_host.h +@@ -419,7 +419,7 @@ struct kvm_s390_irq_payload { struct kvm_s390_local_interrupt { spinlock_t lock; struct kvm_s390_float_interrupt *float_int; @@ -2518,10 +3123,11 @@ diff -Nur linux-4.1.26.orig/arch/s390/include/asm/kvm_host.h linux-4.1.26/arch/s atomic_t *cpuflags; DECLARE_BITMAP(sigp_emerg_pending, KVM_MAX_VCPUS); struct kvm_s390_irq_payload irq; -diff -Nur linux-4.1.26.orig/arch/s390/include/asm/uaccess.h linux-4.1.26/arch/s390/include/asm/uaccess.h ---- linux-4.1.26.orig/arch/s390/include/asm/uaccess.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/s390/include/asm/uaccess.h 2016-06-19 15:30:58.603294110 +0200 -@@ -98,7 +98,8 @@ +diff --git a/arch/s390/include/asm/uaccess.h b/arch/s390/include/asm/uaccess.h +index f6ac1d7e7ed8..5c7381c5ad7f 100644 +--- a/arch/s390/include/asm/uaccess.h ++++ b/arch/s390/include/asm/uaccess.h +@@ -98,7 +98,8 @@ static inline unsigned long extable_fixup(const struct exception_table_entry *x) * @from: Source address, in user space. * @n: Number of bytes to copy. * @@ -2531,7 +3137,7 @@ diff -Nur linux-4.1.26.orig/arch/s390/include/asm/uaccess.h linux-4.1.26/arch/s3 * * Copy data from user space to kernel space. Caller must check * the specified block with access_ok() before calling this function. -@@ -118,7 +119,8 @@ +@@ -118,7 +119,8 @@ unsigned long __must_check __copy_from_user(void *to, const void __user *from, * @from: Source address, in kernel space. * @n: Number of bytes to copy. * @@ -2541,7 +3147,7 @@ diff -Nur linux-4.1.26.orig/arch/s390/include/asm/uaccess.h linux-4.1.26/arch/s3 * * Copy data from kernel space to user space. Caller must check * the specified block with access_ok() before calling this function. -@@ -264,7 +266,8 @@ +@@ -264,7 +266,8 @@ int __get_user_bad(void) __attribute__((noreturn)); * @from: Source address, in kernel space. * @n: Number of bytes to copy. * @@ -2551,7 +3157,7 @@ diff -Nur linux-4.1.26.orig/arch/s390/include/asm/uaccess.h linux-4.1.26/arch/s3 * * Copy data from kernel space to user space. * -@@ -290,7 +293,8 @@ +@@ -290,7 +293,8 @@ __compiletime_warning("copy_from_user() buffer size is not provably correct") * @from: Source address, in user space. * @n: Number of bytes to copy. * @@ -2561,7 +3167,7 @@ diff -Nur linux-4.1.26.orig/arch/s390/include/asm/uaccess.h linux-4.1.26/arch/s3 * * Copy data from user space to kernel space. * -@@ -348,7 +352,8 @@ +@@ -348,7 +352,8 @@ static inline unsigned long strnlen_user(const char __user *src, unsigned long n * strlen_user: - Get the size of a string in user space. * @str: The string to measure. * @@ -2571,10 +3177,11 @@ diff -Nur linux-4.1.26.orig/arch/s390/include/asm/uaccess.h linux-4.1.26/arch/s3 * * Get the size of a NUL-terminated string in user space. * -diff -Nur linux-4.1.26.orig/arch/s390/kvm/interrupt.c linux-4.1.26/arch/s390/kvm/interrupt.c ---- linux-4.1.26.orig/arch/s390/kvm/interrupt.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/s390/kvm/interrupt.c 2016-06-19 15:30:58.607294264 +0200 -@@ -875,13 +875,13 @@ +diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c +index 3dbba9a2bb0f..15016703b4bf 100644 +--- a/arch/s390/kvm/interrupt.c ++++ b/arch/s390/kvm/interrupt.c +@@ -875,13 +875,13 @@ no_timer: void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu) { @@ -2590,7 +3197,7 @@ diff -Nur linux-4.1.26.orig/arch/s390/kvm/interrupt.c linux-4.1.26/arch/s390/kvm vcpu->stat.halt_wakeup++; } } -@@ -987,7 +987,7 @@ +@@ -987,7 +987,7 @@ int kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code) spin_lock(&li->lock); irq.u.pgm.code = code; __inject_prog(vcpu, &irq); @@ -2599,7 +3206,7 @@ diff -Nur linux-4.1.26.orig/arch/s390/kvm/interrupt.c linux-4.1.26/arch/s390/kvm spin_unlock(&li->lock); return 0; } -@@ -1006,7 +1006,7 @@ +@@ -1006,7 +1006,7 @@ int kvm_s390_inject_prog_irq(struct kvm_vcpu *vcpu, spin_lock(&li->lock); irq.u.pgm = *pgm_info; rc = __inject_prog(vcpu, &irq); @@ -2608,10 +3215,11 @@ diff -Nur linux-4.1.26.orig/arch/s390/kvm/interrupt.c linux-4.1.26/arch/s390/kvm spin_unlock(&li->lock); return rc; } -diff -Nur linux-4.1.26.orig/arch/s390/mm/fault.c linux-4.1.26/arch/s390/mm/fault.c ---- linux-4.1.26.orig/arch/s390/mm/fault.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/s390/mm/fault.c 2016-06-19 15:30:58.607294264 +0200 -@@ -399,7 +399,7 @@ +diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c +index 76515bcea2f1..4c8f5d7f9c23 100644 +--- a/arch/s390/mm/fault.c ++++ b/arch/s390/mm/fault.c +@@ -399,7 +399,7 @@ static inline int do_exception(struct pt_regs *regs, int access) * user context. */ fault = VM_FAULT_BADCONTEXT; @@ -2620,9 +3228,10 @@ diff -Nur linux-4.1.26.orig/arch/s390/mm/fault.c linux-4.1.26/arch/s390/mm/fault goto out; address = trans_exc_code & __FAIL_ADDR_MASK; -diff -Nur linux-4.1.26.orig/arch/score/include/asm/uaccess.h linux-4.1.26/arch/score/include/asm/uaccess.h ---- linux-4.1.26.orig/arch/score/include/asm/uaccess.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/score/include/asm/uaccess.h 2016-06-19 15:30:58.607294264 +0200 +diff --git a/arch/score/include/asm/uaccess.h b/arch/score/include/asm/uaccess.h +index 69326dfb894d..01aec8ccde83 100644 +--- a/arch/score/include/asm/uaccess.h ++++ b/arch/score/include/asm/uaccess.h @@ -36,7 +36,8 @@ * @addr: User space pointer to start of block to check * @size: Size of block to check @@ -2673,9 +3282,10 @@ diff -Nur linux-4.1.26.orig/arch/score/include/asm/uaccess.h linux-4.1.26/arch/s * * This macro copies a single simple variable from user space to kernel * space. It supports simple types like char and int, but not larger -diff -Nur linux-4.1.26.orig/arch/score/mm/fault.c linux-4.1.26/arch/score/mm/fault.c ---- linux-4.1.26.orig/arch/score/mm/fault.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/score/mm/fault.c 2016-06-19 15:30:58.607294264 +0200 +diff --git a/arch/score/mm/fault.c b/arch/score/mm/fault.c +index 6860beb2a280..37a6c2e0e969 100644 +--- a/arch/score/mm/fault.c ++++ b/arch/score/mm/fault.c @@ -34,6 +34,7 @@ #include <linux/string.h> #include <linux/types.h> @@ -2684,7 +3294,7 @@ diff -Nur linux-4.1.26.orig/arch/score/mm/fault.c linux-4.1.26/arch/score/mm/fau /* * This routine handles page faults. It determines the address, -@@ -73,7 +74,7 @@ +@@ -73,7 +74,7 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long write, * If we're in an interrupt or have no user * context, we must not take the fault.. */ @@ -2693,10 +3303,11 @@ diff -Nur linux-4.1.26.orig/arch/score/mm/fault.c linux-4.1.26/arch/score/mm/fau goto bad_area_nosemaphore; if (user_mode(regs)) -diff -Nur linux-4.1.26.orig/arch/sh/kernel/irq.c linux-4.1.26/arch/sh/kernel/irq.c ---- linux-4.1.26.orig/arch/sh/kernel/irq.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/sh/kernel/irq.c 2016-06-19 15:30:58.607294264 +0200 -@@ -147,6 +147,7 @@ +diff --git a/arch/sh/kernel/irq.c b/arch/sh/kernel/irq.c +index eb10ff84015c..6fe8089e63fa 100644 +--- a/arch/sh/kernel/irq.c ++++ b/arch/sh/kernel/irq.c +@@ -147,6 +147,7 @@ void irq_ctx_exit(int cpu) hardirq_ctx[cpu] = NULL; } @@ -2704,7 +3315,7 @@ diff -Nur linux-4.1.26.orig/arch/sh/kernel/irq.c linux-4.1.26/arch/sh/kernel/irq void do_softirq_own_stack(void) { struct thread_info *curctx; -@@ -174,6 +175,7 @@ +@@ -174,6 +175,7 @@ void do_softirq_own_stack(void) "r5", "r6", "r7", "r8", "r9", "r15", "t", "pr" ); } @@ -2712,9 +3323,10 @@ diff -Nur linux-4.1.26.orig/arch/sh/kernel/irq.c linux-4.1.26/arch/sh/kernel/irq #else static inline void handle_one_irq(unsigned int irq) { -diff -Nur linux-4.1.26.orig/arch/sh/mm/fault.c linux-4.1.26/arch/sh/mm/fault.c ---- linux-4.1.26.orig/arch/sh/mm/fault.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/sh/mm/fault.c 2016-06-19 15:30:58.607294264 +0200 +diff --git a/arch/sh/mm/fault.c b/arch/sh/mm/fault.c +index a58fec9b55e0..79d8276377d1 100644 +--- a/arch/sh/mm/fault.c ++++ b/arch/sh/mm/fault.c @@ -17,6 +17,7 @@ #include <linux/kprobes.h> #include <linux/perf_event.h> @@ -2723,7 +3335,7 @@ diff -Nur linux-4.1.26.orig/arch/sh/mm/fault.c linux-4.1.26/arch/sh/mm/fault.c #include <asm/io_trapped.h> #include <asm/mmu_context.h> #include <asm/tlbflush.h> -@@ -438,9 +439,9 @@ +@@ -438,9 +439,9 @@ asmlinkage void __kprobes do_page_fault(struct pt_regs *regs, /* * If we're in an interrupt, have no user context or are running @@ -2735,10 +3347,11 @@ diff -Nur linux-4.1.26.orig/arch/sh/mm/fault.c linux-4.1.26/arch/sh/mm/fault.c bad_area_nosemaphore(regs, error_code, address); return; } -diff -Nur linux-4.1.26.orig/arch/sparc/Kconfig linux-4.1.26/arch/sparc/Kconfig ---- linux-4.1.26.orig/arch/sparc/Kconfig 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/sparc/Kconfig 2016-06-19 15:30:58.607294264 +0200 -@@ -189,12 +189,10 @@ +diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig +index e49502acbab4..85cb0c621283 100644 +--- a/arch/sparc/Kconfig ++++ b/arch/sparc/Kconfig +@@ -189,12 +189,10 @@ config NR_CPUS source kernel/Kconfig.hz config RWSEM_GENERIC_SPINLOCK @@ -2753,10 +3366,11 @@ diff -Nur linux-4.1.26.orig/arch/sparc/Kconfig linux-4.1.26/arch/sparc/Kconfig config GENERIC_HWEIGHT bool -diff -Nur linux-4.1.26.orig/arch/sparc/kernel/irq_64.c linux-4.1.26/arch/sparc/kernel/irq_64.c ---- linux-4.1.26.orig/arch/sparc/kernel/irq_64.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/sparc/kernel/irq_64.c 2016-06-19 15:30:58.607294264 +0200 -@@ -849,6 +849,7 @@ +diff --git a/arch/sparc/kernel/irq_64.c b/arch/sparc/kernel/irq_64.c +index 4033c23bdfa6..763cd88b4e92 100644 +--- a/arch/sparc/kernel/irq_64.c ++++ b/arch/sparc/kernel/irq_64.c +@@ -849,6 +849,7 @@ void __irq_entry handler_irq(int pil, struct pt_regs *regs) set_irq_regs(old_regs); } @@ -2764,7 +3378,7 @@ diff -Nur linux-4.1.26.orig/arch/sparc/kernel/irq_64.c linux-4.1.26/arch/sparc/k void do_softirq_own_stack(void) { void *orig_sp, *sp = softirq_stack[smp_processor_id()]; -@@ -863,6 +864,7 @@ +@@ -863,6 +864,7 @@ void do_softirq_own_stack(void) __asm__ __volatile__("mov %0, %%sp" : : "r" (orig_sp)); } @@ -2772,9 +3386,10 @@ diff -Nur linux-4.1.26.orig/arch/sparc/kernel/irq_64.c linux-4.1.26/arch/sparc/k #ifdef CONFIG_HOTPLUG_CPU void fixup_irqs(void) -diff -Nur linux-4.1.26.orig/arch/sparc/mm/fault_32.c linux-4.1.26/arch/sparc/mm/fault_32.c ---- linux-4.1.26.orig/arch/sparc/mm/fault_32.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/sparc/mm/fault_32.c 2016-06-19 15:30:58.607294264 +0200 +diff --git a/arch/sparc/mm/fault_32.c b/arch/sparc/mm/fault_32.c +index 70d817154fe8..c399e7b3b035 100644 +--- a/arch/sparc/mm/fault_32.c ++++ b/arch/sparc/mm/fault_32.c @@ -21,6 +21,7 @@ #include <linux/perf_event.h> #include <linux/interrupt.h> @@ -2791,7 +3406,7 @@ diff -Nur linux-4.1.26.orig/arch/sparc/mm/fault_32.c linux-4.1.26/arch/sparc/mm/ #include "mm_32.h" -@@ -196,7 +196,7 @@ +@@ -196,7 +196,7 @@ asmlinkage void do_sparc_fault(struct pt_regs *regs, int text_fault, int write, * If we're in an interrupt or have no user * context, we must not take the fault.. */ @@ -2800,9 +3415,10 @@ diff -Nur linux-4.1.26.orig/arch/sparc/mm/fault_32.c linux-4.1.26/arch/sparc/mm/ goto no_context; perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS, 1, regs, address); -diff -Nur linux-4.1.26.orig/arch/sparc/mm/fault_64.c linux-4.1.26/arch/sparc/mm/fault_64.c ---- linux-4.1.26.orig/arch/sparc/mm/fault_64.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/sparc/mm/fault_64.c 2016-06-19 15:30:58.607294264 +0200 +diff --git a/arch/sparc/mm/fault_64.c b/arch/sparc/mm/fault_64.c +index 479823249429..e9268ea1a68d 100644 +--- a/arch/sparc/mm/fault_64.c ++++ b/arch/sparc/mm/fault_64.c @@ -22,12 +22,12 @@ #include <linux/kdebug.h> #include <linux/percpu.h> @@ -2817,7 +3433,7 @@ diff -Nur linux-4.1.26.orig/arch/sparc/mm/fault_64.c linux-4.1.26/arch/sparc/mm/ #include <asm/asi.h> #include <asm/lsu.h> #include <asm/sections.h> -@@ -330,7 +330,7 @@ +@@ -330,7 +330,7 @@ asmlinkage void __kprobes do_sparc64_fault(struct pt_regs *regs) * If we're in an interrupt or have no user * context, we must not take the fault.. */ @@ -2826,10 +3442,11 @@ diff -Nur linux-4.1.26.orig/arch/sparc/mm/fault_64.c linux-4.1.26/arch/sparc/mm/ goto intr_or_no_mm; perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS, 1, regs, address); -diff -Nur linux-4.1.26.orig/arch/sparc/mm/highmem.c linux-4.1.26/arch/sparc/mm/highmem.c ---- linux-4.1.26.orig/arch/sparc/mm/highmem.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/sparc/mm/highmem.c 2016-06-19 15:30:58.607294264 +0200 -@@ -53,7 +53,7 @@ +diff --git a/arch/sparc/mm/highmem.c b/arch/sparc/mm/highmem.c +index 449f864f0cef..a454ec5ff07a 100644 +--- a/arch/sparc/mm/highmem.c ++++ b/arch/sparc/mm/highmem.c +@@ -53,7 +53,7 @@ void *kmap_atomic(struct page *page) unsigned long vaddr; long idx, type; @@ -2838,7 +3455,7 @@ diff -Nur linux-4.1.26.orig/arch/sparc/mm/highmem.c linux-4.1.26/arch/sparc/mm/h pagefault_disable(); if (!PageHighMem(page)) return page_address(page); -@@ -91,6 +91,7 @@ +@@ -91,6 +91,7 @@ void __kunmap_atomic(void *kvaddr) if (vaddr < FIXADDR_START) { // FIXME pagefault_enable(); @@ -2846,17 +3463,18 @@ diff -Nur linux-4.1.26.orig/arch/sparc/mm/highmem.c linux-4.1.26/arch/sparc/mm/h return; } -@@ -126,5 +127,6 @@ +@@ -126,5 +127,6 @@ void __kunmap_atomic(void *kvaddr) kmap_atomic_idx_pop(); pagefault_enable(); + preempt_enable(); } EXPORT_SYMBOL(__kunmap_atomic); -diff -Nur linux-4.1.26.orig/arch/sparc/mm/init_64.c linux-4.1.26/arch/sparc/mm/init_64.c ---- linux-4.1.26.orig/arch/sparc/mm/init_64.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/sparc/mm/init_64.c 2016-06-19 15:30:58.607294264 +0200 -@@ -2738,7 +2738,7 @@ +diff --git a/arch/sparc/mm/init_64.c b/arch/sparc/mm/init_64.c +index 1d71181dcc04..1a55c8481272 100644 +--- a/arch/sparc/mm/init_64.c ++++ b/arch/sparc/mm/init_64.c +@@ -2738,7 +2738,7 @@ void hugetlb_setup(struct pt_regs *regs) struct mm_struct *mm = current->mm; struct tsb_config *tp; @@ -2865,10 +3483,11 @@ diff -Nur linux-4.1.26.orig/arch/sparc/mm/init_64.c linux-4.1.26/arch/sparc/mm/i const struct exception_table_entry *entry; entry = search_exception_tables(regs->tpc); -diff -Nur linux-4.1.26.orig/arch/tile/include/asm/uaccess.h linux-4.1.26/arch/tile/include/asm/uaccess.h ---- linux-4.1.26.orig/arch/tile/include/asm/uaccess.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/tile/include/asm/uaccess.h 2016-06-19 15:30:58.611294419 +0200 -@@ -78,7 +78,8 @@ +diff --git a/arch/tile/include/asm/uaccess.h b/arch/tile/include/asm/uaccess.h +index f41cb53cf645..a33276bf5ca1 100644 +--- a/arch/tile/include/asm/uaccess.h ++++ b/arch/tile/include/asm/uaccess.h +@@ -78,7 +78,8 @@ int __range_ok(unsigned long addr, unsigned long size); * @addr: User space pointer to start of block to check * @size: Size of block to check * @@ -2878,7 +3497,7 @@ diff -Nur linux-4.1.26.orig/arch/tile/include/asm/uaccess.h linux-4.1.26/arch/ti * * Checks if a pointer to a block of memory in user space is valid. * -@@ -192,7 +193,8 @@ +@@ -192,7 +193,8 @@ extern int __get_user_bad(void) * @x: Variable to store result. * @ptr: Source address, in user space. * @@ -2888,7 +3507,7 @@ diff -Nur linux-4.1.26.orig/arch/tile/include/asm/uaccess.h linux-4.1.26/arch/ti * * This macro copies a single simple variable from user space to kernel * space. It supports simple types like char and int, but not larger -@@ -274,7 +276,8 @@ +@@ -274,7 +276,8 @@ extern int __put_user_bad(void) * @x: Value to copy to user space. * @ptr: Destination address, in user space. * @@ -2898,7 +3517,7 @@ diff -Nur linux-4.1.26.orig/arch/tile/include/asm/uaccess.h linux-4.1.26/arch/ti * * This macro copies a single simple value from kernel space to user * space. It supports simple types like char and int, but not larger -@@ -330,7 +333,8 @@ +@@ -330,7 +333,8 @@ extern int __put_user_bad(void) * @from: Source address, in kernel space. * @n: Number of bytes to copy. * @@ -2908,7 +3527,7 @@ diff -Nur linux-4.1.26.orig/arch/tile/include/asm/uaccess.h linux-4.1.26/arch/ti * * Copy data from kernel space to user space. Caller must check * the specified block with access_ok() before calling this function. -@@ -366,7 +370,8 @@ +@@ -366,7 +370,8 @@ copy_to_user(void __user *to, const void *from, unsigned long n) * @from: Source address, in user space. * @n: Number of bytes to copy. * @@ -2918,7 +3537,7 @@ diff -Nur linux-4.1.26.orig/arch/tile/include/asm/uaccess.h linux-4.1.26/arch/ti * * Copy data from user space to kernel space. Caller must check * the specified block with access_ok() before calling this function. -@@ -437,7 +442,8 @@ +@@ -437,7 +442,8 @@ static inline unsigned long __must_check copy_from_user(void *to, * @from: Source address, in user space. * @n: Number of bytes to copy. * @@ -2928,10 +3547,11 @@ diff -Nur linux-4.1.26.orig/arch/tile/include/asm/uaccess.h linux-4.1.26/arch/ti * * Copy data from user space to user space. Caller must check * the specified blocks with access_ok() before calling this function. -diff -Nur linux-4.1.26.orig/arch/tile/mm/fault.c linux-4.1.26/arch/tile/mm/fault.c ---- linux-4.1.26.orig/arch/tile/mm/fault.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/tile/mm/fault.c 2016-06-19 15:30:58.611294419 +0200 -@@ -354,9 +354,9 @@ +diff --git a/arch/tile/mm/fault.c b/arch/tile/mm/fault.c +index e83cc999da02..3f4f58d34a92 100644 +--- a/arch/tile/mm/fault.c ++++ b/arch/tile/mm/fault.c +@@ -354,9 +354,9 @@ static int handle_page_fault(struct pt_regs *regs, /* * If we're in an interrupt, have no user context or are running in an @@ -2943,10 +3563,11 @@ diff -Nur linux-4.1.26.orig/arch/tile/mm/fault.c linux-4.1.26/arch/tile/mm/fault vma = NULL; /* happy compiler */ goto bad_area_nosemaphore; } -diff -Nur linux-4.1.26.orig/arch/tile/mm/highmem.c linux-4.1.26/arch/tile/mm/highmem.c ---- linux-4.1.26.orig/arch/tile/mm/highmem.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/tile/mm/highmem.c 2016-06-19 15:30:58.611294419 +0200 -@@ -201,7 +201,7 @@ +diff --git a/arch/tile/mm/highmem.c b/arch/tile/mm/highmem.c +index 6aa2f2625447..fcd545014e79 100644 +--- a/arch/tile/mm/highmem.c ++++ b/arch/tile/mm/highmem.c +@@ -201,7 +201,7 @@ void *kmap_atomic_prot(struct page *page, pgprot_t prot) int idx, type; pte_t *pte; @@ -2955,7 +3576,7 @@ diff -Nur linux-4.1.26.orig/arch/tile/mm/highmem.c linux-4.1.26/arch/tile/mm/hig pagefault_disable(); /* Avoid icache flushes by disallowing atomic executable mappings. */ -@@ -259,6 +259,7 @@ +@@ -259,6 +259,7 @@ void __kunmap_atomic(void *kvaddr) } pagefault_enable(); @@ -2963,10 +3584,11 @@ diff -Nur linux-4.1.26.orig/arch/tile/mm/highmem.c linux-4.1.26/arch/tile/mm/hig } EXPORT_SYMBOL(__kunmap_atomic); -diff -Nur linux-4.1.26.orig/arch/um/kernel/trap.c linux-4.1.26/arch/um/kernel/trap.c ---- linux-4.1.26.orig/arch/um/kernel/trap.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/um/kernel/trap.c 2016-06-19 15:30:58.611294419 +0200 -@@ -35,10 +35,10 @@ +diff --git a/arch/um/kernel/trap.c b/arch/um/kernel/trap.c +index 8e4daf44e980..f9c9e5a6beba 100644 +--- a/arch/um/kernel/trap.c ++++ b/arch/um/kernel/trap.c +@@ -35,10 +35,10 @@ int handle_page_fault(unsigned long address, unsigned long ip, *code_out = SEGV_MAPERR; /* @@ -2979,10 +3601,11 @@ diff -Nur linux-4.1.26.orig/arch/um/kernel/trap.c linux-4.1.26/arch/um/kernel/tr goto out_nosemaphore; if (is_user) -diff -Nur linux-4.1.26.orig/arch/unicore32/mm/fault.c linux-4.1.26/arch/unicore32/mm/fault.c ---- linux-4.1.26.orig/arch/unicore32/mm/fault.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/unicore32/mm/fault.c 2016-06-19 15:30:58.611294419 +0200 -@@ -218,7 +218,7 @@ +diff --git a/arch/unicore32/mm/fault.c b/arch/unicore32/mm/fault.c +index 0dc922dba915..afccef5529cc 100644 +--- a/arch/unicore32/mm/fault.c ++++ b/arch/unicore32/mm/fault.c +@@ -218,7 +218,7 @@ static int do_pf(unsigned long addr, unsigned int fsr, struct pt_regs *regs) * If we're in an interrupt or have no user * context, we must not take the fault.. */ @@ -2991,10 +3614,45 @@ diff -Nur linux-4.1.26.orig/arch/unicore32/mm/fault.c linux-4.1.26/arch/unicore3 goto no_context; if (user_mode(regs)) -diff -Nur linux-4.1.26.orig/arch/x86/crypto/aesni-intel_glue.c linux-4.1.26/arch/x86/crypto/aesni-intel_glue.c ---- linux-4.1.26.orig/arch/x86/crypto/aesni-intel_glue.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/x86/crypto/aesni-intel_glue.c 2016-06-19 15:30:58.611294419 +0200 -@@ -382,14 +382,14 @@ +diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig +index 226d5696e1d1..aac357a4cd5c 100644 +--- a/arch/x86/Kconfig ++++ b/arch/x86/Kconfig +@@ -22,6 +22,7 @@ config X86_64 + ### Arch settings + config X86 + def_bool y ++ select HAVE_PREEMPT_LAZY + select ACPI_SYSTEM_POWER_STATES_SUPPORT if ACPI + select ARCH_MIGHT_HAVE_ACPI_PDC if ACPI + select ARCH_HAS_DEBUG_STRICT_USER_COPY_CHECKS +@@ -203,8 +204,11 @@ config ARCH_MAY_HAVE_PC_FDC + def_bool y + depends on ISA_DMA_API + ++config RWSEM_GENERIC_SPINLOCK ++ def_bool PREEMPT_RT_FULL ++ + config RWSEM_XCHGADD_ALGORITHM +- def_bool y ++ def_bool !RWSEM_GENERIC_SPINLOCK && !PREEMPT_RT_FULL + + config GENERIC_CALIBRATE_DELAY + def_bool y +@@ -838,7 +842,7 @@ config IOMMU_HELPER + config MAXSMP + bool "Enable Maximum number of SMP Processors and NUMA Nodes" + depends on X86_64 && SMP && DEBUG_KERNEL +- select CPUMASK_OFFSTACK ++ select CPUMASK_OFFSTACK if !PREEMPT_RT_FULL + ---help--- + Enable maximum number of CPUS and NUMA Nodes for this architecture. + If unsure, say N. +diff --git a/arch/x86/crypto/aesni-intel_glue.c b/arch/x86/crypto/aesni-intel_glue.c +index 112cefacf2af..3fd3b16349ae 100644 +--- a/arch/x86/crypto/aesni-intel_glue.c ++++ b/arch/x86/crypto/aesni-intel_glue.c +@@ -382,14 +382,14 @@ static int ecb_encrypt(struct blkcipher_desc *desc, err = blkcipher_walk_virt(desc, &walk); desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; @@ -3012,7 +3670,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/crypto/aesni-intel_glue.c linux-4.1.26/arch return err; } -@@ -406,14 +406,14 @@ +@@ -406,14 +406,14 @@ static int ecb_decrypt(struct blkcipher_desc *desc, err = blkcipher_walk_virt(desc, &walk); desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; @@ -3029,7 +3687,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/crypto/aesni-intel_glue.c linux-4.1.26/arch return err; } -@@ -430,14 +430,14 @@ +@@ -430,14 +430,14 @@ static int cbc_encrypt(struct blkcipher_desc *desc, err = blkcipher_walk_virt(desc, &walk); desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; @@ -3046,7 +3704,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/crypto/aesni-intel_glue.c linux-4.1.26/arch return err; } -@@ -454,14 +454,14 @@ +@@ -454,14 +454,14 @@ static int cbc_decrypt(struct blkcipher_desc *desc, err = blkcipher_walk_virt(desc, &walk); desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; @@ -3063,7 +3721,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/crypto/aesni-intel_glue.c linux-4.1.26/arch return err; } -@@ -513,18 +513,20 @@ +@@ -513,18 +513,20 @@ static int ctr_crypt(struct blkcipher_desc *desc, err = blkcipher_walk_virt_block(desc, &walk, AES_BLOCK_SIZE); desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; @@ -3086,10 +3744,11 @@ diff -Nur linux-4.1.26.orig/arch/x86/crypto/aesni-intel_glue.c linux-4.1.26/arch return err; } -diff -Nur linux-4.1.26.orig/arch/x86/crypto/cast5_avx_glue.c linux-4.1.26/arch/x86/crypto/cast5_avx_glue.c ---- linux-4.1.26.orig/arch/x86/crypto/cast5_avx_glue.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/x86/crypto/cast5_avx_glue.c 2016-06-19 15:30:58.611294419 +0200 -@@ -60,7 +60,7 @@ +diff --git a/arch/x86/crypto/cast5_avx_glue.c b/arch/x86/crypto/cast5_avx_glue.c +index 236c80974457..f799ec36bfa7 100644 +--- a/arch/x86/crypto/cast5_avx_glue.c ++++ b/arch/x86/crypto/cast5_avx_glue.c +@@ -60,7 +60,7 @@ static inline void cast5_fpu_end(bool fpu_enabled) static int ecb_crypt(struct blkcipher_desc *desc, struct blkcipher_walk *walk, bool enc) { @@ -3098,7 +3757,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/crypto/cast5_avx_glue.c linux-4.1.26/arch/x struct cast5_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); const unsigned int bsize = CAST5_BLOCK_SIZE; unsigned int nbytes; -@@ -76,7 +76,7 @@ +@@ -76,7 +76,7 @@ static int ecb_crypt(struct blkcipher_desc *desc, struct blkcipher_walk *walk, u8 *wsrc = walk->src.virt.addr; u8 *wdst = walk->dst.virt.addr; @@ -3107,7 +3766,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/crypto/cast5_avx_glue.c linux-4.1.26/arch/x /* Process multi-block batch */ if (nbytes >= bsize * CAST5_PARALLEL_BLOCKS) { -@@ -104,10 +104,9 @@ +@@ -104,10 +104,9 @@ static int ecb_crypt(struct blkcipher_desc *desc, struct blkcipher_walk *walk, } while (nbytes >= bsize); done: @@ -3119,7 +3778,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/crypto/cast5_avx_glue.c linux-4.1.26/arch/x return err; } -@@ -228,7 +227,7 @@ +@@ -228,7 +227,7 @@ done: static int cbc_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst, struct scatterlist *src, unsigned int nbytes) { @@ -3128,7 +3787,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/crypto/cast5_avx_glue.c linux-4.1.26/arch/x struct blkcipher_walk walk; int err; -@@ -237,12 +236,11 @@ +@@ -237,12 +236,11 @@ static int cbc_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst, desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; while ((nbytes = walk.nbytes)) { @@ -3143,7 +3802,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/crypto/cast5_avx_glue.c linux-4.1.26/arch/x return err; } -@@ -312,7 +310,7 @@ +@@ -312,7 +310,7 @@ done: static int ctr_crypt(struct blkcipher_desc *desc, struct scatterlist *dst, struct scatterlist *src, unsigned int nbytes) { @@ -3152,7 +3811,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/crypto/cast5_avx_glue.c linux-4.1.26/arch/x struct blkcipher_walk walk; int err; -@@ -321,13 +319,12 @@ +@@ -321,13 +319,12 @@ static int ctr_crypt(struct blkcipher_desc *desc, struct scatterlist *dst, desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; while ((nbytes = walk.nbytes) >= CAST5_BLOCK_SIZE) { @@ -3168,10 +3827,11 @@ diff -Nur linux-4.1.26.orig/arch/x86/crypto/cast5_avx_glue.c linux-4.1.26/arch/x if (walk.nbytes) { ctr_crypt_final(desc, &walk); err = blkcipher_walk_done(desc, &walk, 0); -diff -Nur linux-4.1.26.orig/arch/x86/crypto/glue_helper.c linux-4.1.26/arch/x86/crypto/glue_helper.c ---- linux-4.1.26.orig/arch/x86/crypto/glue_helper.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/x86/crypto/glue_helper.c 2016-06-19 15:30:58.611294419 +0200 -@@ -39,7 +39,7 @@ +diff --git a/arch/x86/crypto/glue_helper.c b/arch/x86/crypto/glue_helper.c +index 6a85598931b5..3a506ce7ed93 100644 +--- a/arch/x86/crypto/glue_helper.c ++++ b/arch/x86/crypto/glue_helper.c +@@ -39,7 +39,7 @@ static int __glue_ecb_crypt_128bit(const struct common_glue_ctx *gctx, void *ctx = crypto_blkcipher_ctx(desc->tfm); const unsigned int bsize = 128 / 8; unsigned int nbytes, i, func_bytes; @@ -3180,7 +3840,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/crypto/glue_helper.c linux-4.1.26/arch/x86/ int err; err = blkcipher_walk_virt(desc, walk); -@@ -49,7 +49,7 @@ +@@ -49,7 +49,7 @@ static int __glue_ecb_crypt_128bit(const struct common_glue_ctx *gctx, u8 *wdst = walk->dst.virt.addr; fpu_enabled = glue_fpu_begin(bsize, gctx->fpu_blocks_limit, @@ -3189,7 +3849,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/crypto/glue_helper.c linux-4.1.26/arch/x86/ for (i = 0; i < gctx->num_funcs; i++) { func_bytes = bsize * gctx->funcs[i].num_blocks; -@@ -71,10 +71,10 @@ +@@ -71,10 +71,10 @@ static int __glue_ecb_crypt_128bit(const struct common_glue_ctx *gctx, } done: @@ -3201,7 +3861,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/crypto/glue_helper.c linux-4.1.26/arch/x86/ return err; } -@@ -194,7 +194,7 @@ +@@ -194,7 +194,7 @@ int glue_cbc_decrypt_128bit(const struct common_glue_ctx *gctx, struct scatterlist *src, unsigned int nbytes) { const unsigned int bsize = 128 / 8; @@ -3210,7 +3870,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/crypto/glue_helper.c linux-4.1.26/arch/x86/ struct blkcipher_walk walk; int err; -@@ -203,12 +203,12 @@ +@@ -203,12 +203,12 @@ int glue_cbc_decrypt_128bit(const struct common_glue_ctx *gctx, while ((nbytes = walk.nbytes)) { fpu_enabled = glue_fpu_begin(bsize, gctx->fpu_blocks_limit, @@ -3225,7 +3885,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/crypto/glue_helper.c linux-4.1.26/arch/x86/ return err; } EXPORT_SYMBOL_GPL(glue_cbc_decrypt_128bit); -@@ -277,7 +277,7 @@ +@@ -277,7 +277,7 @@ int glue_ctr_crypt_128bit(const struct common_glue_ctx *gctx, struct scatterlist *src, unsigned int nbytes) { const unsigned int bsize = 128 / 8; @@ -3234,7 +3894,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/crypto/glue_helper.c linux-4.1.26/arch/x86/ struct blkcipher_walk walk; int err; -@@ -286,13 +286,12 @@ +@@ -286,13 +286,12 @@ int glue_ctr_crypt_128bit(const struct common_glue_ctx *gctx, while ((nbytes = walk.nbytes) >= bsize) { fpu_enabled = glue_fpu_begin(bsize, gctx->fpu_blocks_limit, @@ -3250,7 +3910,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/crypto/glue_helper.c linux-4.1.26/arch/x86/ if (walk.nbytes) { glue_ctr_crypt_final_128bit( gctx->funcs[gctx->num_funcs - 1].fn_u.ctr, desc, &walk); -@@ -347,7 +346,7 @@ +@@ -347,7 +346,7 @@ int glue_xts_crypt_128bit(const struct common_glue_ctx *gctx, void *tweak_ctx, void *crypt_ctx) { const unsigned int bsize = 128 / 8; @@ -3259,7 +3919,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/crypto/glue_helper.c linux-4.1.26/arch/x86/ struct blkcipher_walk walk; int err; -@@ -360,21 +359,21 @@ +@@ -360,21 +359,21 @@ int glue_xts_crypt_128bit(const struct common_glue_ctx *gctx, /* set minimum length to bsize, for tweak_fn */ fpu_enabled = glue_fpu_begin(bsize, gctx->fpu_blocks_limit, @@ -3286,10 +3946,11 @@ diff -Nur linux-4.1.26.orig/arch/x86/crypto/glue_helper.c linux-4.1.26/arch/x86/ return err; } EXPORT_SYMBOL_GPL(glue_xts_crypt_128bit); -diff -Nur linux-4.1.26.orig/arch/x86/include/asm/preempt.h linux-4.1.26/arch/x86/include/asm/preempt.h ---- linux-4.1.26.orig/arch/x86/include/asm/preempt.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/x86/include/asm/preempt.h 2016-06-19 15:30:58.611294419 +0200 -@@ -82,17 +82,33 @@ +diff --git a/arch/x86/include/asm/preempt.h b/arch/x86/include/asm/preempt.h +index 67b6cd00a44f..eff1b8609f77 100644 +--- a/arch/x86/include/asm/preempt.h ++++ b/arch/x86/include/asm/preempt.h +@@ -82,17 +82,46 @@ static __always_inline void __preempt_count_sub(int val) * a decrement which hits zero means we have no preempt_count and should * reschedule. */ @@ -3304,6 +3965,8 @@ diff -Nur linux-4.1.26.orig/arch/x86/include/asm/preempt.h linux-4.1.26/arch/x86 + if (____preempt_count_dec_and_test()) + return true; +#ifdef CONFIG_PREEMPT_LAZY ++ if (current_thread_info()->preempt_lazy_count) ++ return false; + return test_thread_flag(TIF_NEED_RESCHED_LAZY); +#else + return false; @@ -3316,18 +3979,30 @@ diff -Nur linux-4.1.26.orig/arch/x86/include/asm/preempt.h linux-4.1.26/arch/x86 static __always_inline bool should_resched(int preempt_offset) { +#ifdef CONFIG_PREEMPT_LAZY -+ return unlikely(raw_cpu_read_4(__preempt_count) == preempt_offset || -+ test_thread_flag(TIF_NEED_RESCHED_LAZY)); ++ u32 tmp; ++ ++ tmp = raw_cpu_read_4(__preempt_count); ++ if (tmp == preempt_offset) ++ return true; ++ ++ /* preempt count == 0 ? */ ++ tmp &= ~PREEMPT_NEED_RESCHED; ++ if (tmp) ++ return false; ++ if (current_thread_info()->preempt_lazy_count) ++ return false; ++ return test_thread_flag(TIF_NEED_RESCHED_LAZY); +#else return unlikely(raw_cpu_read_4(__preempt_count) == preempt_offset); +#endif } #ifdef CONFIG_PREEMPT -diff -Nur linux-4.1.26.orig/arch/x86/include/asm/signal.h linux-4.1.26/arch/x86/include/asm/signal.h ---- linux-4.1.26.orig/arch/x86/include/asm/signal.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/x86/include/asm/signal.h 2016-06-19 15:30:58.611294419 +0200 -@@ -23,6 +23,19 @@ +diff --git a/arch/x86/include/asm/signal.h b/arch/x86/include/asm/signal.h +index 31eab867e6d3..0e7bfe98e1d1 100644 +--- a/arch/x86/include/asm/signal.h ++++ b/arch/x86/include/asm/signal.h +@@ -23,6 +23,19 @@ typedef struct { unsigned long sig[_NSIG_WORDS]; } sigset_t; @@ -3347,9 +4022,10 @@ diff -Nur linux-4.1.26.orig/arch/x86/include/asm/signal.h linux-4.1.26/arch/x86/ #ifndef CONFIG_COMPAT typedef sigset_t compat_sigset_t; #endif -diff -Nur linux-4.1.26.orig/arch/x86/include/asm/stackprotector.h linux-4.1.26/arch/x86/include/asm/stackprotector.h ---- linux-4.1.26.orig/arch/x86/include/asm/stackprotector.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/x86/include/asm/stackprotector.h 2016-06-19 15:30:58.611294419 +0200 +diff --git a/arch/x86/include/asm/stackprotector.h b/arch/x86/include/asm/stackprotector.h +index 6a998598f172..64fb5cbe54fa 100644 +--- a/arch/x86/include/asm/stackprotector.h ++++ b/arch/x86/include/asm/stackprotector.h @@ -57,7 +57,7 @@ */ static __always_inline void boot_init_stack_canary(void) @@ -3359,7 +4035,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/include/asm/stackprotector.h linux-4.1.26/a u64 tsc; #ifdef CONFIG_X86_64 -@@ -68,8 +68,16 @@ +@@ -68,8 +68,16 @@ static __always_inline void boot_init_stack_canary(void) * of randomness. The TSC only matters for very early init, * there it already has some randomness on most systems. Later * on during the bootup the random pool has true entropy too. @@ -3376,10 +4052,11 @@ diff -Nur linux-4.1.26.orig/arch/x86/include/asm/stackprotector.h linux-4.1.26/a tsc = __native_read_tsc(); canary += tsc + (tsc << 32UL); -diff -Nur linux-4.1.26.orig/arch/x86/include/asm/thread_info.h linux-4.1.26/arch/x86/include/asm/thread_info.h ---- linux-4.1.26.orig/arch/x86/include/asm/thread_info.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/x86/include/asm/thread_info.h 2016-06-19 15:30:58.611294419 +0200 -@@ -55,6 +55,8 @@ +diff --git a/arch/x86/include/asm/thread_info.h b/arch/x86/include/asm/thread_info.h +index b4bdec3e9523..606144afb990 100644 +--- a/arch/x86/include/asm/thread_info.h ++++ b/arch/x86/include/asm/thread_info.h +@@ -55,6 +55,8 @@ struct thread_info { __u32 status; /* thread synchronous flags */ __u32 cpu; /* current CPU */ int saved_preempt_count; @@ -3388,7 +4065,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/include/asm/thread_info.h linux-4.1.26/arch mm_segment_t addr_limit; void __user *sysenter_return; unsigned int sig_on_uaccess_error:1; -@@ -95,6 +97,7 @@ +@@ -95,6 +97,7 @@ struct thread_info { #define TIF_SYSCALL_EMU 6 /* syscall emulation active */ #define TIF_SYSCALL_AUDIT 7 /* syscall auditing active */ #define TIF_SECCOMP 8 /* secure computing */ @@ -3396,7 +4073,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/include/asm/thread_info.h linux-4.1.26/arch #define TIF_USER_RETURN_NOTIFY 11 /* notify kernel of userspace return */ #define TIF_UPROBE 12 /* breakpointed or singlestepping */ #define TIF_NOTSC 16 /* TSC is not accessible in userland */ -@@ -119,6 +122,7 @@ +@@ -119,6 +122,7 @@ struct thread_info { #define _TIF_SYSCALL_EMU (1 << TIF_SYSCALL_EMU) #define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT) #define _TIF_SECCOMP (1 << TIF_SECCOMP) @@ -3404,7 +4081,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/include/asm/thread_info.h linux-4.1.26/arch #define _TIF_USER_RETURN_NOTIFY (1 << TIF_USER_RETURN_NOTIFY) #define _TIF_UPROBE (1 << TIF_UPROBE) #define _TIF_NOTSC (1 << TIF_NOTSC) -@@ -168,6 +172,8 @@ +@@ -168,6 +172,8 @@ struct thread_info { #define _TIF_WORK_CTXSW_PREV (_TIF_WORK_CTXSW|_TIF_USER_RETURN_NOTIFY) #define _TIF_WORK_CTXSW_NEXT (_TIF_WORK_CTXSW) @@ -3413,33 +4090,11 @@ diff -Nur linux-4.1.26.orig/arch/x86/include/asm/thread_info.h linux-4.1.26/arch #define STACK_WARN (THREAD_SIZE/8) /* -diff -Nur linux-4.1.26.orig/arch/x86/include/asm/uaccess_32.h linux-4.1.26/arch/x86/include/asm/uaccess_32.h ---- linux-4.1.26.orig/arch/x86/include/asm/uaccess_32.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/x86/include/asm/uaccess_32.h 2016-06-19 15:30:58.615294573 +0200 -@@ -70,7 +70,8 @@ - * @from: Source address, in kernel space. - * @n: Number of bytes to copy. - * -- * Context: User context only. This function may sleep. -+ * Context: User context only. This function may sleep if pagefaults are -+ * enabled. - * - * Copy data from kernel space to user space. Caller must check - * the specified block with access_ok() before calling this function. -@@ -117,7 +118,8 @@ - * @from: Source address, in user space. - * @n: Number of bytes to copy. - * -- * Context: User context only. This function may sleep. -+ * Context: User context only. This function may sleep if pagefaults are -+ * enabled. - * - * Copy data from user space to kernel space. Caller must check - * the specified block with access_ok() before calling this function. -diff -Nur linux-4.1.26.orig/arch/x86/include/asm/uaccess.h linux-4.1.26/arch/x86/include/asm/uaccess.h ---- linux-4.1.26.orig/arch/x86/include/asm/uaccess.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/x86/include/asm/uaccess.h 2016-06-19 15:30:58.611294419 +0200 -@@ -74,7 +74,8 @@ +diff --git a/arch/x86/include/asm/uaccess.h b/arch/x86/include/asm/uaccess.h +index d081e7e42fb3..705e3d89d84d 100644 +--- a/arch/x86/include/asm/uaccess.h ++++ b/arch/x86/include/asm/uaccess.h +@@ -74,7 +74,8 @@ static inline bool __chk_range_not_ok(unsigned long addr, unsigned long size, un * @addr: User space pointer to start of block to check * @size: Size of block to check * @@ -3449,7 +4104,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/include/asm/uaccess.h linux-4.1.26/arch/x86 * * Checks if a pointer to a block of memory in user space is valid. * -@@ -145,7 +146,8 @@ +@@ -145,7 +146,8 @@ __typeof__(__builtin_choose_expr(sizeof(x) > sizeof(0UL), 0ULL, 0UL)) * @x: Variable to store result. * @ptr: Source address, in user space. * @@ -3459,7 +4114,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/include/asm/uaccess.h linux-4.1.26/arch/x86 * * This macro copies a single simple variable from user space to kernel * space. It supports simple types like char and int, but not larger -@@ -240,7 +242,8 @@ +@@ -240,7 +242,8 @@ extern void __put_user_8(void); * @x: Value to copy to user space. * @ptr: Destination address, in user space. * @@ -3469,7 +4124,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/include/asm/uaccess.h linux-4.1.26/arch/x86 * * This macro copies a single simple value from kernel space to user * space. It supports simple types like char and int, but not larger -@@ -455,7 +458,8 @@ +@@ -459,7 +462,8 @@ struct __large_struct { unsigned long buf[100]; }; * @x: Variable to store result. * @ptr: Source address, in user space. * @@ -3479,7 +4134,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/include/asm/uaccess.h linux-4.1.26/arch/x86 * * This macro copies a single simple variable from user space to kernel * space. It supports simple types like char and int, but not larger -@@ -479,7 +483,8 @@ +@@ -483,7 +487,8 @@ struct __large_struct { unsigned long buf[100]; }; * @x: Value to copy to user space. * @ptr: Destination address, in user space. * @@ -3489,10 +4144,35 @@ diff -Nur linux-4.1.26.orig/arch/x86/include/asm/uaccess.h linux-4.1.26/arch/x86 * * This macro copies a single simple value from kernel space to user * space. It supports simple types like char and int, but not larger -diff -Nur linux-4.1.26.orig/arch/x86/include/asm/uv/uv_bau.h linux-4.1.26/arch/x86/include/asm/uv/uv_bau.h ---- linux-4.1.26.orig/arch/x86/include/asm/uv/uv_bau.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/x86/include/asm/uv/uv_bau.h 2016-06-19 15:30:58.615294573 +0200 -@@ -615,9 +615,9 @@ +diff --git a/arch/x86/include/asm/uaccess_32.h b/arch/x86/include/asm/uaccess_32.h +index 3c03a5de64d3..7c8ad3451988 100644 +--- a/arch/x86/include/asm/uaccess_32.h ++++ b/arch/x86/include/asm/uaccess_32.h +@@ -70,7 +70,8 @@ __copy_to_user_inatomic(void __user *to, const void *from, unsigned long n) + * @from: Source address, in kernel space. + * @n: Number of bytes to copy. + * +- * Context: User context only. This function may sleep. ++ * Context: User context only. This function may sleep if pagefaults are ++ * enabled. + * + * Copy data from kernel space to user space. Caller must check + * the specified block with access_ok() before calling this function. +@@ -117,7 +118,8 @@ __copy_from_user_inatomic(void *to, const void __user *from, unsigned long n) + * @from: Source address, in user space. + * @n: Number of bytes to copy. + * +- * Context: User context only. This function may sleep. ++ * Context: User context only. This function may sleep if pagefaults are ++ * enabled. + * + * Copy data from user space to kernel space. Caller must check + * the specified block with access_ok() before calling this function. +diff --git a/arch/x86/include/asm/uv/uv_bau.h b/arch/x86/include/asm/uv/uv_bau.h +index fc808b83fccb..ebb40118abf5 100644 +--- a/arch/x86/include/asm/uv/uv_bau.h ++++ b/arch/x86/include/asm/uv/uv_bau.h +@@ -615,9 +615,9 @@ struct bau_control { cycles_t send_message; cycles_t period_end; cycles_t period_time; @@ -3505,7 +4185,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/include/asm/uv/uv_bau.h linux-4.1.26/arch/x /* tunables */ int max_concurr; int max_concurr_const; -@@ -776,15 +776,15 @@ +@@ -776,15 +776,15 @@ static inline int atom_asr(short i, struct atomic_short *v) * to be lowered below the current 'v'. atomic_add_unless can only stop * on equal. */ @@ -3525,10 +4205,11 @@ diff -Nur linux-4.1.26.orig/arch/x86/include/asm/uv/uv_bau.h linux-4.1.26/arch/x return 1; } -diff -Nur linux-4.1.26.orig/arch/x86/include/asm/uv/uv_hub.h linux-4.1.26/arch/x86/include/asm/uv/uv_hub.h ---- linux-4.1.26.orig/arch/x86/include/asm/uv/uv_hub.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/x86/include/asm/uv/uv_hub.h 2016-06-19 15:30:58.615294573 +0200 -@@ -492,7 +492,7 @@ +diff --git a/arch/x86/include/asm/uv/uv_hub.h b/arch/x86/include/asm/uv/uv_hub.h +index a00ad8f2a657..c2729abe02bc 100644 +--- a/arch/x86/include/asm/uv/uv_hub.h ++++ b/arch/x86/include/asm/uv/uv_hub.h +@@ -492,7 +492,7 @@ struct uv_blade_info { unsigned short nr_online_cpus; unsigned short pnode; short memory_nid; @@ -3537,43 +4218,11 @@ diff -Nur linux-4.1.26.orig/arch/x86/include/asm/uv/uv_hub.h linux-4.1.26/arch/x unsigned long nmi_count; /* obsolete, see uv_hub_nmi */ }; extern struct uv_blade_info *uv_blade_info; -diff -Nur linux-4.1.26.orig/arch/x86/Kconfig linux-4.1.26/arch/x86/Kconfig ---- linux-4.1.26.orig/arch/x86/Kconfig 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/x86/Kconfig 2016-06-19 15:30:58.611294419 +0200 -@@ -22,6 +22,7 @@ - ### Arch settings - config X86 - def_bool y -+ select HAVE_PREEMPT_LAZY - select ACPI_SYSTEM_POWER_STATES_SUPPORT if ACPI - select ARCH_MIGHT_HAVE_ACPI_PDC if ACPI - select ARCH_HAS_DEBUG_STRICT_USER_COPY_CHECKS -@@ -203,8 +204,11 @@ - def_bool y - depends on ISA_DMA_API - -+config RWSEM_GENERIC_SPINLOCK -+ def_bool PREEMPT_RT_FULL -+ - config RWSEM_XCHGADD_ALGORITHM -- def_bool y -+ def_bool !RWSEM_GENERIC_SPINLOCK && !PREEMPT_RT_FULL - - config GENERIC_CALIBRATE_DELAY - def_bool y -@@ -838,7 +842,7 @@ - config MAXSMP - bool "Enable Maximum number of SMP Processors and NUMA Nodes" - depends on X86_64 && SMP && DEBUG_KERNEL -- select CPUMASK_OFFSTACK -+ select CPUMASK_OFFSTACK if !PREEMPT_RT_FULL - ---help--- - Enable maximum number of CPUS and NUMA Nodes for this architecture. - If unsure, say N. -diff -Nur linux-4.1.26.orig/arch/x86/kernel/apic/io_apic.c linux-4.1.26/arch/x86/kernel/apic/io_apic.c ---- linux-4.1.26.orig/arch/x86/kernel/apic/io_apic.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/x86/kernel/apic/io_apic.c 2016-06-19 15:30:58.615294573 +0200 -@@ -1891,7 +1891,8 @@ +diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c +index f4dc2462a1ac..07c6aba75aa0 100644 +--- a/arch/x86/kernel/apic/io_apic.c ++++ b/arch/x86/kernel/apic/io_apic.c +@@ -1891,7 +1891,8 @@ static bool io_apic_level_ack_pending(struct irq_cfg *cfg) static inline bool ioapic_irqd_mask(struct irq_data *data, struct irq_cfg *cfg) { /* If we are moving the irq we need to mask it */ @@ -3583,10 +4232,11 @@ diff -Nur linux-4.1.26.orig/arch/x86/kernel/apic/io_apic.c linux-4.1.26/arch/x86 mask_ioapic(cfg); return true; } -diff -Nur linux-4.1.26.orig/arch/x86/kernel/apic/x2apic_uv_x.c linux-4.1.26/arch/x86/kernel/apic/x2apic_uv_x.c ---- linux-4.1.26.orig/arch/x86/kernel/apic/x2apic_uv_x.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/x86/kernel/apic/x2apic_uv_x.c 2016-06-19 15:30:58.615294573 +0200 -@@ -949,7 +949,7 @@ +diff --git a/arch/x86/kernel/apic/x2apic_uv_x.c b/arch/x86/kernel/apic/x2apic_uv_x.c +index c8d92950bc04..3d2fbca33b73 100644 +--- a/arch/x86/kernel/apic/x2apic_uv_x.c ++++ b/arch/x86/kernel/apic/x2apic_uv_x.c +@@ -949,7 +949,7 @@ void __init uv_system_init(void) uv_blade_info[blade].pnode = pnode; uv_blade_info[blade].nr_possible_cpus = 0; uv_blade_info[blade].nr_online_cpus = 0; @@ -3595,10 +4245,11 @@ diff -Nur linux-4.1.26.orig/arch/x86/kernel/apic/x2apic_uv_x.c linux-4.1.26/arch min_pnode = min(pnode, min_pnode); max_pnode = max(pnode, max_pnode); blade++; -diff -Nur linux-4.1.26.orig/arch/x86/kernel/asm-offsets.c linux-4.1.26/arch/x86/kernel/asm-offsets.c ---- linux-4.1.26.orig/arch/x86/kernel/asm-offsets.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/x86/kernel/asm-offsets.c 2016-06-19 15:30:58.615294573 +0200 -@@ -32,6 +32,7 @@ +diff --git a/arch/x86/kernel/asm-offsets.c b/arch/x86/kernel/asm-offsets.c +index 9f6b9341950f..5701b507510b 100644 +--- a/arch/x86/kernel/asm-offsets.c ++++ b/arch/x86/kernel/asm-offsets.c +@@ -32,6 +32,7 @@ void common(void) { OFFSET(TI_flags, thread_info, flags); OFFSET(TI_status, thread_info, status); OFFSET(TI_addr_limit, thread_info, addr_limit); @@ -3606,15 +4257,16 @@ diff -Nur linux-4.1.26.orig/arch/x86/kernel/asm-offsets.c linux-4.1.26/arch/x86/ BLANK(); OFFSET(crypto_tfm_ctx_offset, crypto_tfm, __crt_ctx); -@@ -71,4 +72,5 @@ +@@ -71,4 +72,5 @@ void common(void) { BLANK(); DEFINE(PTREGS_SIZE, sizeof(struct pt_regs)); + DEFINE(_PREEMPT_ENABLED, PREEMPT_ENABLED); } -diff -Nur linux-4.1.26.orig/arch/x86/kernel/cpu/mcheck/mce.c linux-4.1.26/arch/x86/kernel/cpu/mcheck/mce.c ---- linux-4.1.26.orig/arch/x86/kernel/cpu/mcheck/mce.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/x86/kernel/cpu/mcheck/mce.c 2016-06-19 15:30:58.615294573 +0200 +diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c +index 20190bdac9d5..9d46f9a133e1 100644 +--- a/arch/x86/kernel/cpu/mcheck/mce.c ++++ b/arch/x86/kernel/cpu/mcheck/mce.c @@ -41,6 +41,8 @@ #include <linux/debugfs.h> #include <linux/irq_work.h> @@ -3624,7 +4276,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/kernel/cpu/mcheck/mce.c linux-4.1.26/arch/x #include <asm/processor.h> #include <asm/traps.h> -@@ -1267,7 +1269,7 @@ +@@ -1267,7 +1269,7 @@ void mce_log_therm_throt_event(__u64 status) static unsigned long check_interval = INITIAL_CHECK_INTERVAL; static DEFINE_PER_CPU(unsigned long, mce_next_interval); /* in jiffies */ @@ -3633,7 +4285,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/kernel/cpu/mcheck/mce.c linux-4.1.26/arch/x static unsigned long mce_adjust_timer_default(unsigned long interval) { -@@ -1276,32 +1278,18 @@ +@@ -1276,32 +1278,18 @@ static unsigned long mce_adjust_timer_default(unsigned long interval) static unsigned long (*mce_adjust_timer)(unsigned long interval) = mce_adjust_timer_default; @@ -3672,7 +4324,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/kernel/cpu/mcheck/mce.c linux-4.1.26/arch/x iv = __this_cpu_read(mce_next_interval); if (mce_available(this_cpu_ptr(&cpu_info))) { -@@ -1324,7 +1312,7 @@ +@@ -1324,7 +1312,7 @@ static void mce_timer_fn(unsigned long data) done: __this_cpu_write(mce_next_interval, iv); @@ -3681,7 +4333,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/kernel/cpu/mcheck/mce.c linux-4.1.26/arch/x } /* -@@ -1332,7 +1320,7 @@ +@@ -1332,7 +1320,7 @@ done: */ void mce_timer_kick(unsigned long interval) { @@ -3690,7 +4342,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/kernel/cpu/mcheck/mce.c linux-4.1.26/arch/x unsigned long iv = __this_cpu_read(mce_next_interval); __restart_timer(t, interval); -@@ -1347,7 +1335,7 @@ +@@ -1347,7 +1335,7 @@ static void mce_timer_delete_all(void) int cpu; for_each_online_cpu(cpu) @@ -3699,7 +4351,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/kernel/cpu/mcheck/mce.c linux-4.1.26/arch/x } static void mce_do_trigger(struct work_struct *work) -@@ -1357,6 +1345,56 @@ +@@ -1357,6 +1345,56 @@ static void mce_do_trigger(struct work_struct *work) static DECLARE_WORK(mce_trigger_work, mce_do_trigger); @@ -3756,7 +4408,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/kernel/cpu/mcheck/mce.c linux-4.1.26/arch/x /* * Notify the user(s) about new machine check events. * Can be called from interrupt context, but not from machine check/NMI -@@ -1364,19 +1402,8 @@ +@@ -1364,19 +1402,8 @@ static DECLARE_WORK(mce_trigger_work, mce_do_trigger); */ int mce_notify_irq(void) { @@ -3777,7 +4429,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/kernel/cpu/mcheck/mce.c linux-4.1.26/arch/x return 1; } return 0; -@@ -1649,7 +1676,7 @@ +@@ -1649,7 +1676,7 @@ static void __mcheck_cpu_init_vendor(struct cpuinfo_x86 *c) } } @@ -3786,7 +4438,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/kernel/cpu/mcheck/mce.c linux-4.1.26/arch/x { unsigned long iv = check_interval * HZ; -@@ -1658,16 +1685,17 @@ +@@ -1658,16 +1685,17 @@ static void mce_start_timer(unsigned int cpu, struct timer_list *t) per_cpu(mce_next_interval, cpu) = iv; @@ -3808,7 +4460,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/kernel/cpu/mcheck/mce.c linux-4.1.26/arch/x mce_start_timer(cpu, t); } -@@ -2345,6 +2373,8 @@ +@@ -2345,6 +2373,8 @@ static void mce_disable_cpu(void *h) if (!mce_available(raw_cpu_ptr(&cpu_info))) return; @@ -3817,7 +4469,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/kernel/cpu/mcheck/mce.c linux-4.1.26/arch/x if (!(action & CPU_TASKS_FROZEN)) cmci_clear(); for (i = 0; i < mca_cfg.banks; i++) { -@@ -2371,6 +2401,7 @@ +@@ -2371,6 +2401,7 @@ static void mce_reenable_cpu(void *h) if (b->init) wrmsrl(MSR_IA32_MCx_CTL(i), b->ctl); } @@ -3825,7 +4477,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/kernel/cpu/mcheck/mce.c linux-4.1.26/arch/x } /* Get notified when a cpu comes on/off. Be hotplug friendly. */ -@@ -2378,7 +2409,6 @@ +@@ -2378,7 +2409,6 @@ static int mce_cpu_callback(struct notifier_block *nfb, unsigned long action, void *hcpu) { unsigned int cpu = (unsigned long)hcpu; @@ -3833,7 +4485,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/kernel/cpu/mcheck/mce.c linux-4.1.26/arch/x switch (action & ~CPU_TASKS_FROZEN) { case CPU_ONLINE: -@@ -2398,11 +2428,9 @@ +@@ -2398,11 +2428,9 @@ mce_cpu_callback(struct notifier_block *nfb, unsigned long action, void *hcpu) break; case CPU_DOWN_PREPARE: smp_call_function_single(cpu, mce_disable_cpu, &action, 1); @@ -3845,7 +4497,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/kernel/cpu/mcheck/mce.c linux-4.1.26/arch/x break; } -@@ -2441,6 +2469,10 @@ +@@ -2441,6 +2469,10 @@ static __init int mcheck_init_device(void) goto err_out; } @@ -3856,10 +4508,96 @@ diff -Nur linux-4.1.26.orig/arch/x86/kernel/cpu/mcheck/mce.c linux-4.1.26/arch/x if (!zalloc_cpumask_var(&mce_device_initialized, GFP_KERNEL)) { err = -ENOMEM; goto err_out; -diff -Nur linux-4.1.26.orig/arch/x86/kernel/dumpstack_32.c linux-4.1.26/arch/x86/kernel/dumpstack_32.c ---- linux-4.1.26.orig/arch/x86/kernel/dumpstack_32.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/x86/kernel/dumpstack_32.c 2016-06-19 15:30:58.615294573 +0200 -@@ -42,7 +42,7 @@ +diff --git a/arch/x86/kernel/cpu/perf_event_intel_rapl.c b/arch/x86/kernel/cpu/perf_event_intel_rapl.c +index 358c54ad20d4..94689f19ad92 100644 +--- a/arch/x86/kernel/cpu/perf_event_intel_rapl.c ++++ b/arch/x86/kernel/cpu/perf_event_intel_rapl.c +@@ -119,7 +119,7 @@ static struct perf_pmu_events_attr event_attr_##v = { \ + }; + + struct rapl_pmu { +- spinlock_t lock; ++ raw_spinlock_t lock; + int n_active; /* number of active events */ + struct list_head active_list; + struct pmu *pmu; /* pointer to rapl_pmu_class */ +@@ -223,13 +223,13 @@ static enum hrtimer_restart rapl_hrtimer_handle(struct hrtimer *hrtimer) + if (!pmu->n_active) + return HRTIMER_NORESTART; + +- spin_lock_irqsave(&pmu->lock, flags); ++ raw_spin_lock_irqsave(&pmu->lock, flags); + + list_for_each_entry(event, &pmu->active_list, active_entry) { + rapl_event_update(event); + } + +- spin_unlock_irqrestore(&pmu->lock, flags); ++ raw_spin_unlock_irqrestore(&pmu->lock, flags); + + hrtimer_forward_now(hrtimer, pmu->timer_interval); + +@@ -266,9 +266,9 @@ static void rapl_pmu_event_start(struct perf_event *event, int mode) + struct rapl_pmu *pmu = __this_cpu_read(rapl_pmu); + unsigned long flags; + +- spin_lock_irqsave(&pmu->lock, flags); ++ raw_spin_lock_irqsave(&pmu->lock, flags); + __rapl_pmu_event_start(pmu, event); +- spin_unlock_irqrestore(&pmu->lock, flags); ++ raw_spin_unlock_irqrestore(&pmu->lock, flags); + } + + static void rapl_pmu_event_stop(struct perf_event *event, int mode) +@@ -277,7 +277,7 @@ static void rapl_pmu_event_stop(struct perf_event *event, int mode) + struct hw_perf_event *hwc = &event->hw; + unsigned long flags; + +- spin_lock_irqsave(&pmu->lock, flags); ++ raw_spin_lock_irqsave(&pmu->lock, flags); + + /* mark event as deactivated and stopped */ + if (!(hwc->state & PERF_HES_STOPPED)) { +@@ -302,7 +302,7 @@ static void rapl_pmu_event_stop(struct perf_event *event, int mode) + hwc->state |= PERF_HES_UPTODATE; + } + +- spin_unlock_irqrestore(&pmu->lock, flags); ++ raw_spin_unlock_irqrestore(&pmu->lock, flags); + } + + static int rapl_pmu_event_add(struct perf_event *event, int mode) +@@ -311,14 +311,14 @@ static int rapl_pmu_event_add(struct perf_event *event, int mode) + struct hw_perf_event *hwc = &event->hw; + unsigned long flags; + +- spin_lock_irqsave(&pmu->lock, flags); ++ raw_spin_lock_irqsave(&pmu->lock, flags); + + hwc->state = PERF_HES_UPTODATE | PERF_HES_STOPPED; + + if (mode & PERF_EF_START) + __rapl_pmu_event_start(pmu, event); + +- spin_unlock_irqrestore(&pmu->lock, flags); ++ raw_spin_unlock_irqrestore(&pmu->lock, flags); + + return 0; + } +@@ -594,7 +594,7 @@ static int rapl_cpu_prepare(int cpu) + pmu = kzalloc_node(sizeof(*pmu), GFP_KERNEL, cpu_to_node(cpu)); + if (!pmu) + return -1; +- spin_lock_init(&pmu->lock); ++ raw_spin_lock_init(&pmu->lock); + + INIT_LIST_HEAD(&pmu->active_list); + +diff --git a/arch/x86/kernel/dumpstack_32.c b/arch/x86/kernel/dumpstack_32.c +index 464ffd69b92e..00db1aad1548 100644 +--- a/arch/x86/kernel/dumpstack_32.c ++++ b/arch/x86/kernel/dumpstack_32.c +@@ -42,7 +42,7 @@ void dump_trace(struct task_struct *task, struct pt_regs *regs, unsigned long *stack, unsigned long bp, const struct stacktrace_ops *ops, void *data) { @@ -3868,7 +4606,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/kernel/dumpstack_32.c linux-4.1.26/arch/x86 int graph = 0; u32 *prev_esp; -@@ -86,7 +86,7 @@ +@@ -86,7 +86,7 @@ void dump_trace(struct task_struct *task, struct pt_regs *regs, break; touch_nmi_watchdog(); } @@ -3877,10 +4615,11 @@ diff -Nur linux-4.1.26.orig/arch/x86/kernel/dumpstack_32.c linux-4.1.26/arch/x86 } EXPORT_SYMBOL(dump_trace); -diff -Nur linux-4.1.26.orig/arch/x86/kernel/dumpstack_64.c linux-4.1.26/arch/x86/kernel/dumpstack_64.c ---- linux-4.1.26.orig/arch/x86/kernel/dumpstack_64.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/x86/kernel/dumpstack_64.c 2016-06-19 15:30:58.615294573 +0200 -@@ -152,7 +152,7 @@ +diff --git a/arch/x86/kernel/dumpstack_64.c b/arch/x86/kernel/dumpstack_64.c +index 5f1c6266eb30..c331e3fef465 100644 +--- a/arch/x86/kernel/dumpstack_64.c ++++ b/arch/x86/kernel/dumpstack_64.c +@@ -152,7 +152,7 @@ void dump_trace(struct task_struct *task, struct pt_regs *regs, unsigned long *stack, unsigned long bp, const struct stacktrace_ops *ops, void *data) { @@ -3889,7 +4628,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/kernel/dumpstack_64.c linux-4.1.26/arch/x86 struct thread_info *tinfo; unsigned long *irq_stack = (unsigned long *)per_cpu(irq_stack_ptr, cpu); unsigned long dummy; -@@ -241,7 +241,7 @@ +@@ -241,7 +241,7 @@ void dump_trace(struct task_struct *task, struct pt_regs *regs, * This handles the process stack: */ bp = ops->walk_stack(tinfo, stack, bp, ops, data, NULL, &graph); @@ -3898,7 +4637,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/kernel/dumpstack_64.c linux-4.1.26/arch/x86 } EXPORT_SYMBOL(dump_trace); -@@ -255,7 +255,7 @@ +@@ -255,7 +255,7 @@ show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs, int cpu; int i; @@ -3907,7 +4646,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/kernel/dumpstack_64.c linux-4.1.26/arch/x86 cpu = smp_processor_id(); irq_stack_end = (unsigned long *)(per_cpu(irq_stack_ptr, cpu)); -@@ -291,7 +291,7 @@ +@@ -291,7 +291,7 @@ show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs, pr_cont(" %016lx", *stack++); touch_nmi_watchdog(); } @@ -3916,10 +4655,11 @@ diff -Nur linux-4.1.26.orig/arch/x86/kernel/dumpstack_64.c linux-4.1.26/arch/x86 pr_cont("\n"); show_trace_log_lvl(task, regs, sp, bp, log_lvl); -diff -Nur linux-4.1.26.orig/arch/x86/kernel/entry_32.S linux-4.1.26/arch/x86/kernel/entry_32.S ---- linux-4.1.26.orig/arch/x86/kernel/entry_32.S 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/x86/kernel/entry_32.S 2016-06-19 15:30:58.615294573 +0200 -@@ -359,8 +359,24 @@ +diff --git a/arch/x86/kernel/entry_32.S b/arch/x86/kernel/entry_32.S +index 1c309763e321..8612b314af92 100644 +--- a/arch/x86/kernel/entry_32.S ++++ b/arch/x86/kernel/entry_32.S +@@ -359,8 +359,24 @@ END(ret_from_exception) ENTRY(resume_kernel) DISABLE_INTERRUPTS(CLBR_ANY) need_resched: @@ -3944,7 +4684,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/kernel/entry_32.S linux-4.1.26/arch/x86/ker testl $X86_EFLAGS_IF,PT_EFLAGS(%esp) # interrupts off (exception path) ? jz restore_all call preempt_schedule_irq -@@ -594,7 +610,7 @@ +@@ -594,7 +610,7 @@ ENDPROC(system_call) ALIGN RING0_PTREGS_FRAME # can't unwind into user space anyway work_pending: @@ -3953,7 +4693,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/kernel/entry_32.S linux-4.1.26/arch/x86/ker jz work_notifysig work_resched: call schedule -@@ -607,7 +623,7 @@ +@@ -607,7 +623,7 @@ work_resched: andl $_TIF_WORK_MASK, %ecx # is there any work to be done other # than syscall tracing? jz restore_all @@ -3962,10 +4702,11 @@ diff -Nur linux-4.1.26.orig/arch/x86/kernel/entry_32.S linux-4.1.26/arch/x86/ker jnz work_resched work_notifysig: # deal with pending signals and -diff -Nur linux-4.1.26.orig/arch/x86/kernel/entry_64.S linux-4.1.26/arch/x86/kernel/entry_64.S ---- linux-4.1.26.orig/arch/x86/kernel/entry_64.S 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/x86/kernel/entry_64.S 2016-06-19 15:30:58.615294573 +0200 -@@ -370,8 +370,8 @@ +diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S +index 6c9cb6073832..db2a15c91a65 100644 +--- a/arch/x86/kernel/entry_64.S ++++ b/arch/x86/kernel/entry_64.S +@@ -370,8 +370,8 @@ GLOBAL(int_with_check) /* First do a reschedule test. */ /* edx: work, edi: workmask */ int_careful: @@ -3976,7 +4717,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/kernel/entry_64.S linux-4.1.26/arch/x86/ker TRACE_IRQS_ON ENABLE_INTERRUPTS(CLBR_NONE) pushq_cfi %rdi -@@ -776,7 +776,23 @@ +@@ -776,7 +776,23 @@ retint_kernel: bt $9,EFLAGS(%rsp) /* interrupts were off? */ jnc 1f 0: cmpl $0,PER_CPU_VAR(__preempt_count) @@ -4000,7 +4741,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/kernel/entry_64.S linux-4.1.26/arch/x86/ker call preempt_schedule_irq jmp 0b 1: -@@ -844,8 +860,8 @@ +@@ -844,8 +860,8 @@ native_irq_return_ldt: /* edi: workmask, edx: work */ retint_careful: CFI_RESTORE_STATE @@ -4011,7 +4752,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/kernel/entry_64.S linux-4.1.26/arch/x86/ker TRACE_IRQS_ON ENABLE_INTERRUPTS(CLBR_NONE) pushq_cfi %rdi -@@ -1118,6 +1134,7 @@ +@@ -1118,6 +1134,7 @@ bad_gs: jmp 2b .previous @@ -4019,7 +4760,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/kernel/entry_64.S linux-4.1.26/arch/x86/ker /* Call softirq on interrupt stack. Interrupts are off. */ ENTRY(do_softirq_own_stack) CFI_STARTPROC -@@ -1137,6 +1154,7 @@ +@@ -1137,6 +1154,7 @@ ENTRY(do_softirq_own_stack) ret CFI_ENDPROC END(do_softirq_own_stack) @@ -4027,10 +4768,11 @@ diff -Nur linux-4.1.26.orig/arch/x86/kernel/entry_64.S linux-4.1.26/arch/x86/ker #ifdef CONFIG_XEN idtentry xen_hypervisor_callback xen_do_hypervisor_callback has_error_code=0 -diff -Nur linux-4.1.26.orig/arch/x86/kernel/irq_32.c linux-4.1.26/arch/x86/kernel/irq_32.c ---- linux-4.1.26.orig/arch/x86/kernel/irq_32.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/x86/kernel/irq_32.c 2016-06-19 15:30:58.619294727 +0200 -@@ -135,6 +135,7 @@ +diff --git a/arch/x86/kernel/irq_32.c b/arch/x86/kernel/irq_32.c +index f9fd86a7fcc7..521ef3cc8066 100644 +--- a/arch/x86/kernel/irq_32.c ++++ b/arch/x86/kernel/irq_32.c +@@ -135,6 +135,7 @@ void irq_ctx_init(int cpu) cpu, per_cpu(hardirq_stack, cpu), per_cpu(softirq_stack, cpu)); } @@ -4038,7 +4780,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/kernel/irq_32.c linux-4.1.26/arch/x86/kerne void do_softirq_own_stack(void) { struct thread_info *curstk; -@@ -153,6 +154,7 @@ +@@ -153,6 +154,7 @@ void do_softirq_own_stack(void) call_on_stack(__do_softirq, isp); } @@ -4046,9 +4788,153 @@ diff -Nur linux-4.1.26.orig/arch/x86/kernel/irq_32.c linux-4.1.26/arch/x86/kerne bool handle_irq(unsigned irq, struct pt_regs *regs) { -diff -Nur linux-4.1.26.orig/arch/x86/kernel/process_32.c linux-4.1.26/arch/x86/kernel/process_32.c ---- linux-4.1.26.orig/arch/x86/kernel/process_32.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/x86/kernel/process_32.c 2016-06-19 15:30:58.619294727 +0200 +diff --git a/arch/x86/kernel/kvm.c b/arch/x86/kernel/kvm.c +index 9435620062df..ba97b5b45879 100644 +--- a/arch/x86/kernel/kvm.c ++++ b/arch/x86/kernel/kvm.c +@@ -36,6 +36,7 @@ + #include <linux/kprobes.h> + #include <linux/debugfs.h> + #include <linux/nmi.h> ++#include <linux/wait-simple.h> + #include <asm/timer.h> + #include <asm/cpu.h> + #include <asm/traps.h> +@@ -91,14 +92,14 @@ static void kvm_io_delay(void) + + struct kvm_task_sleep_node { + struct hlist_node link; +- wait_queue_head_t wq; ++ struct swait_head wq; + u32 token; + int cpu; + bool halted; + }; + + static struct kvm_task_sleep_head { +- spinlock_t lock; ++ raw_spinlock_t lock; + struct hlist_head list; + } async_pf_sleepers[KVM_TASK_SLEEP_HASHSIZE]; + +@@ -122,17 +123,17 @@ void kvm_async_pf_task_wait(u32 token) + u32 key = hash_32(token, KVM_TASK_SLEEP_HASHBITS); + struct kvm_task_sleep_head *b = &async_pf_sleepers[key]; + struct kvm_task_sleep_node n, *e; +- DEFINE_WAIT(wait); ++ DEFINE_SWAITER(wait); + + rcu_irq_enter(); + +- spin_lock(&b->lock); ++ raw_spin_lock(&b->lock); + e = _find_apf_task(b, token); + if (e) { + /* dummy entry exist -> wake up was delivered ahead of PF */ + hlist_del(&e->link); + kfree(e); +- spin_unlock(&b->lock); ++ raw_spin_unlock(&b->lock); + + rcu_irq_exit(); + return; +@@ -141,13 +142,13 @@ void kvm_async_pf_task_wait(u32 token) + n.token = token; + n.cpu = smp_processor_id(); + n.halted = is_idle_task(current) || preempt_count() > 1; +- init_waitqueue_head(&n.wq); ++ init_swait_head(&n.wq); + hlist_add_head(&n.link, &b->list); +- spin_unlock(&b->lock); ++ raw_spin_unlock(&b->lock); + + for (;;) { + if (!n.halted) +- prepare_to_wait(&n.wq, &wait, TASK_UNINTERRUPTIBLE); ++ swait_prepare(&n.wq, &wait, TASK_UNINTERRUPTIBLE); + if (hlist_unhashed(&n.link)) + break; + +@@ -166,7 +167,7 @@ void kvm_async_pf_task_wait(u32 token) + } + } + if (!n.halted) +- finish_wait(&n.wq, &wait); ++ swait_finish(&n.wq, &wait); + + rcu_irq_exit(); + return; +@@ -178,8 +179,8 @@ static void apf_task_wake_one(struct kvm_task_sleep_node *n) + hlist_del_init(&n->link); + if (n->halted) + smp_send_reschedule(n->cpu); +- else if (waitqueue_active(&n->wq)) +- wake_up(&n->wq); ++ else if (swaitqueue_active(&n->wq)) ++ swait_wake(&n->wq); + } + + static void apf_task_wake_all(void) +@@ -189,14 +190,14 @@ static void apf_task_wake_all(void) + for (i = 0; i < KVM_TASK_SLEEP_HASHSIZE; i++) { + struct hlist_node *p, *next; + struct kvm_task_sleep_head *b = &async_pf_sleepers[i]; +- spin_lock(&b->lock); ++ raw_spin_lock(&b->lock); + hlist_for_each_safe(p, next, &b->list) { + struct kvm_task_sleep_node *n = + hlist_entry(p, typeof(*n), link); + if (n->cpu == smp_processor_id()) + apf_task_wake_one(n); + } +- spin_unlock(&b->lock); ++ raw_spin_unlock(&b->lock); + } + } + +@@ -212,7 +213,7 @@ void kvm_async_pf_task_wake(u32 token) + } + + again: +- spin_lock(&b->lock); ++ raw_spin_lock(&b->lock); + n = _find_apf_task(b, token); + if (!n) { + /* +@@ -225,17 +226,17 @@ again: + * Allocation failed! Busy wait while other cpu + * handles async PF. + */ +- spin_unlock(&b->lock); ++ raw_spin_unlock(&b->lock); + cpu_relax(); + goto again; + } + n->token = token; + n->cpu = smp_processor_id(); +- init_waitqueue_head(&n->wq); ++ init_swait_head(&n->wq); + hlist_add_head(&n->link, &b->list); + } else + apf_task_wake_one(n); +- spin_unlock(&b->lock); ++ raw_spin_unlock(&b->lock); + return; + } + EXPORT_SYMBOL_GPL(kvm_async_pf_task_wake); +@@ -486,7 +487,7 @@ void __init kvm_guest_init(void) + paravirt_ops_setup(); + register_reboot_notifier(&kvm_pv_reboot_nb); + for (i = 0; i < KVM_TASK_SLEEP_HASHSIZE; i++) +- spin_lock_init(&async_pf_sleepers[i].lock); ++ raw_spin_lock_init(&async_pf_sleepers[i].lock); + if (kvm_para_has_feature(KVM_FEATURE_ASYNC_PF)) + x86_init.irqs.trap_init = kvm_apf_trap_init; + +diff --git a/arch/x86/kernel/process_32.c b/arch/x86/kernel/process_32.c +index 8ed2106b06da..3a70713079c5 100644 +--- a/arch/x86/kernel/process_32.c ++++ b/arch/x86/kernel/process_32.c @@ -35,6 +35,7 @@ #include <linux/uaccess.h> #include <linux/io.h> @@ -4057,7 +4943,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/kernel/process_32.c linux-4.1.26/arch/x86/k #include <asm/pgtable.h> #include <asm/ldt.h> -@@ -210,6 +211,35 @@ +@@ -210,6 +211,35 @@ start_thread(struct pt_regs *regs, unsigned long new_ip, unsigned long new_sp) } EXPORT_SYMBOL_GPL(start_thread); @@ -4093,7 +4979,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/kernel/process_32.c linux-4.1.26/arch/x86/k /* * switch_to(x,y) should switch tasks from x to y. -@@ -292,6 +322,8 @@ +@@ -292,6 +322,8 @@ __switch_to(struct task_struct *prev_p, struct task_struct *next_p) task_thread_info(next_p)->flags & _TIF_WORK_CTXSW_NEXT)) __switch_to_xtra(prev_p, next_p, tss); @@ -4102,10 +4988,11 @@ diff -Nur linux-4.1.26.orig/arch/x86/kernel/process_32.c linux-4.1.26/arch/x86/k /* * Leave lazy mode, flushing any hypercalls made here. * This must be done before restoring TLS segments so -diff -Nur linux-4.1.26.orig/arch/x86/kernel/signal.c linux-4.1.26/arch/x86/kernel/signal.c ---- linux-4.1.26.orig/arch/x86/kernel/signal.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/x86/kernel/signal.c 2016-06-19 15:30:58.619294727 +0200 -@@ -726,6 +726,14 @@ +diff --git a/arch/x86/kernel/signal.c b/arch/x86/kernel/signal.c +index 5d2e2e9af1c4..1c9cc74ba99b 100644 +--- a/arch/x86/kernel/signal.c ++++ b/arch/x86/kernel/signal.c +@@ -726,6 +726,14 @@ do_notify_resume(struct pt_regs *regs, void *unused, __u32 thread_info_flags) { user_exit(); @@ -4120,10 +5007,11 @@ diff -Nur linux-4.1.26.orig/arch/x86/kernel/signal.c linux-4.1.26/arch/x86/kerne if (thread_info_flags & _TIF_UPROBE) uprobe_notify_resume(regs); -diff -Nur linux-4.1.26.orig/arch/x86/kvm/lapic.c linux-4.1.26/arch/x86/kvm/lapic.c ---- linux-4.1.26.orig/arch/x86/kvm/lapic.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/x86/kvm/lapic.c 2016-06-19 15:30:58.619294727 +0200 -@@ -1106,7 +1106,7 @@ +diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c +index 7dd9a8d3911a..192de5908083 100644 +--- a/arch/x86/kvm/lapic.c ++++ b/arch/x86/kvm/lapic.c +@@ -1106,7 +1106,7 @@ static void apic_update_lvtt(struct kvm_lapic *apic) static void apic_timer_expired(struct kvm_lapic *apic) { struct kvm_vcpu *vcpu = apic->vcpu; @@ -4132,7 +5020,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/kvm/lapic.c linux-4.1.26/arch/x86/kvm/lapic struct kvm_timer *ktimer = &apic->lapic_timer; if (atomic_read(&apic->lapic_timer.pending)) -@@ -1115,8 +1115,8 @@ +@@ -1115,8 +1115,8 @@ static void apic_timer_expired(struct kvm_lapic *apic) atomic_inc(&apic->lapic_timer.pending); kvm_set_pending_timer(vcpu); @@ -4143,7 +5031,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/kvm/lapic.c linux-4.1.26/arch/x86/kvm/lapic if (apic_lvtt_tscdeadline(apic)) ktimer->expired_tscdeadline = ktimer->tscdeadline; -@@ -1169,8 +1169,36 @@ +@@ -1169,8 +1169,36 @@ void wait_lapic_expire(struct kvm_vcpu *vcpu) __delay(tsc_deadline - guest_tsc); } @@ -4180,7 +5068,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/kvm/lapic.c linux-4.1.26/arch/x86/kvm/lapic ktime_t now; atomic_set(&apic->lapic_timer.pending, 0); -@@ -1201,9 +1229,11 @@ +@@ -1201,9 +1229,11 @@ static void start_apic_timer(struct kvm_lapic *apic) } } @@ -4193,7 +5081,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/kvm/lapic.c linux-4.1.26/arch/x86/kvm/lapic apic_debug("%s: bus cycle is %" PRId64 "ns, now 0x%016" PRIx64 ", " -@@ -1235,8 +1265,10 @@ +@@ -1235,8 +1265,10 @@ static void start_apic_timer(struct kvm_lapic *apic) do_div(ns, this_tsc_khz); expire = ktime_add_ns(now, ns); expire = ktime_sub_ns(expire, lapic_timer_advance_ns); @@ -4205,7 +5093,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/kvm/lapic.c linux-4.1.26/arch/x86/kvm/lapic } else apic_timer_expired(apic); -@@ -1709,6 +1741,7 @@ +@@ -1709,6 +1741,7 @@ int kvm_create_lapic(struct kvm_vcpu *vcpu) hrtimer_init(&apic->lapic_timer.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); apic->lapic_timer.timer.function = apic_timer_fn; @@ -4213,7 +5101,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/kvm/lapic.c linux-4.1.26/arch/x86/kvm/lapic /* * APIC is created enabled. This will prevent kvm_lapic_set_base from -@@ -1836,7 +1869,8 @@ +@@ -1836,7 +1869,8 @@ void __kvm_migrate_apic_timer(struct kvm_vcpu *vcpu) timer = &vcpu->arch.apic->lapic_timer.timer; if (hrtimer_cancel(timer)) @@ -4223,10 +5111,11 @@ diff -Nur linux-4.1.26.orig/arch/x86/kvm/lapic.c linux-4.1.26/arch/x86/kvm/lapic } /* -diff -Nur linux-4.1.26.orig/arch/x86/kvm/x86.c linux-4.1.26/arch/x86/kvm/x86.c ---- linux-4.1.26.orig/arch/x86/kvm/x86.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/x86/kvm/x86.c 2016-06-19 15:30:58.619294727 +0200 -@@ -5810,6 +5810,13 @@ +diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c +index bd84d2226ca1..ba639dd5f09d 100644 +--- a/arch/x86/kvm/x86.c ++++ b/arch/x86/kvm/x86.c +@@ -5815,6 +5815,13 @@ int kvm_arch_init(void *opaque) goto out; } @@ -4240,10 +5129,11 @@ diff -Nur linux-4.1.26.orig/arch/x86/kvm/x86.c linux-4.1.26/arch/x86/kvm/x86.c r = kvm_mmu_module_init(); if (r) goto out_free_percpu; -diff -Nur linux-4.1.26.orig/arch/x86/lib/usercopy_32.c linux-4.1.26/arch/x86/lib/usercopy_32.c ---- linux-4.1.26.orig/arch/x86/lib/usercopy_32.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/x86/lib/usercopy_32.c 2016-06-19 15:30:58.619294727 +0200 -@@ -647,7 +647,8 @@ +diff --git a/arch/x86/lib/usercopy_32.c b/arch/x86/lib/usercopy_32.c +index e2f5e21c03b3..91d93b95bd86 100644 +--- a/arch/x86/lib/usercopy_32.c ++++ b/arch/x86/lib/usercopy_32.c +@@ -647,7 +647,8 @@ EXPORT_SYMBOL(__copy_from_user_ll_nocache_nozero); * @from: Source address, in kernel space. * @n: Number of bytes to copy. * @@ -4253,7 +5143,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/lib/usercopy_32.c linux-4.1.26/arch/x86/lib * * Copy data from kernel space to user space. * -@@ -668,7 +669,8 @@ +@@ -668,7 +669,8 @@ EXPORT_SYMBOL(_copy_to_user); * @from: Source address, in user space. * @n: Number of bytes to copy. * @@ -4263,9 +5153,10 @@ diff -Nur linux-4.1.26.orig/arch/x86/lib/usercopy_32.c linux-4.1.26/arch/x86/lib * * Copy data from user space to kernel space. * -diff -Nur linux-4.1.26.orig/arch/x86/mm/fault.c linux-4.1.26/arch/x86/mm/fault.c ---- linux-4.1.26.orig/arch/x86/mm/fault.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/x86/mm/fault.c 2016-06-19 15:30:58.619294727 +0200 +diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c +index 62855ac37ab7..1d3beaf7526f 100644 +--- a/arch/x86/mm/fault.c ++++ b/arch/x86/mm/fault.c @@ -13,6 +13,7 @@ #include <linux/hugetlb.h> /* hstate_index_to_shift */ #include <linux/prefetch.h> /* prefetchw */ @@ -4274,7 +5165,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/mm/fault.c linux-4.1.26/arch/x86/mm/fault.c #include <asm/traps.h> /* dotraplinkage, ... */ #include <asm/pgalloc.h> /* pgd_*(), ... */ -@@ -1133,9 +1134,9 @@ +@@ -1133,9 +1134,9 @@ __do_page_fault(struct pt_regs *regs, unsigned long error_code, /* * If we're in an interrupt, have no user context or are running @@ -4286,10 +5177,11 @@ diff -Nur linux-4.1.26.orig/arch/x86/mm/fault.c linux-4.1.26/arch/x86/mm/fault.c bad_area_nosemaphore(regs, error_code, address); return; } -diff -Nur linux-4.1.26.orig/arch/x86/mm/highmem_32.c linux-4.1.26/arch/x86/mm/highmem_32.c ---- linux-4.1.26.orig/arch/x86/mm/highmem_32.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/x86/mm/highmem_32.c 2016-06-19 15:30:58.619294727 +0200 -@@ -32,10 +32,11 @@ +diff --git a/arch/x86/mm/highmem_32.c b/arch/x86/mm/highmem_32.c +index 4500142bc4aa..0d1cbcf47f80 100644 +--- a/arch/x86/mm/highmem_32.c ++++ b/arch/x86/mm/highmem_32.c +@@ -32,10 +32,11 @@ EXPORT_SYMBOL(kunmap); */ void *kmap_atomic_prot(struct page *page, pgprot_t prot) { @@ -4302,7 +5194,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/mm/highmem_32.c linux-4.1.26/arch/x86/mm/hi pagefault_disable(); if (!PageHighMem(page)) -@@ -45,7 +46,10 @@ +@@ -45,7 +46,10 @@ void *kmap_atomic_prot(struct page *page, pgprot_t prot) idx = type + KM_TYPE_NR*smp_processor_id(); vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx); BUG_ON(!pte_none(*(kmap_pte-idx))); @@ -4314,7 +5206,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/mm/highmem_32.c linux-4.1.26/arch/x86/mm/hi arch_flush_lazy_mmu_mode(); return (void *)vaddr; -@@ -88,6 +92,9 @@ +@@ -88,6 +92,9 @@ void __kunmap_atomic(void *kvaddr) * is a bad idea also, in case the page changes cacheability * attributes or becomes a protected page in a hypervisor. */ @@ -4324,7 +5216,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/mm/highmem_32.c linux-4.1.26/arch/x86/mm/hi kpte_clear_flush(kmap_pte-idx, vaddr); kmap_atomic_idx_pop(); arch_flush_lazy_mmu_mode(); -@@ -100,6 +107,7 @@ +@@ -100,6 +107,7 @@ void __kunmap_atomic(void *kvaddr) #endif pagefault_enable(); @@ -4332,10 +5224,11 @@ diff -Nur linux-4.1.26.orig/arch/x86/mm/highmem_32.c linux-4.1.26/arch/x86/mm/hi } EXPORT_SYMBOL(__kunmap_atomic); -diff -Nur linux-4.1.26.orig/arch/x86/mm/iomap_32.c linux-4.1.26/arch/x86/mm/iomap_32.c ---- linux-4.1.26.orig/arch/x86/mm/iomap_32.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/x86/mm/iomap_32.c 2016-06-19 15:30:58.619294727 +0200 -@@ -56,15 +56,22 @@ +diff --git a/arch/x86/mm/iomap_32.c b/arch/x86/mm/iomap_32.c +index 9ca35fc60cfe..b2ffa5c7d3d3 100644 +--- a/arch/x86/mm/iomap_32.c ++++ b/arch/x86/mm/iomap_32.c +@@ -56,15 +56,22 @@ EXPORT_SYMBOL_GPL(iomap_free); void *kmap_atomic_prot_pfn(unsigned long pfn, pgprot_t prot) { @@ -4359,7 +5252,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/mm/iomap_32.c linux-4.1.26/arch/x86/mm/ioma arch_flush_lazy_mmu_mode(); return (void *)vaddr; -@@ -112,10 +119,14 @@ +@@ -112,10 +119,14 @@ iounmap_atomic(void __iomem *kvaddr) * is a bad idea also, in case the page changes cacheability * attributes or becomes a protected page in a hypervisor. */ @@ -4374,10 +5267,11 @@ diff -Nur linux-4.1.26.orig/arch/x86/mm/iomap_32.c linux-4.1.26/arch/x86/mm/ioma + preempt_enable(); } EXPORT_SYMBOL_GPL(iounmap_atomic); -diff -Nur linux-4.1.26.orig/arch/x86/platform/uv/tlb_uv.c linux-4.1.26/arch/x86/platform/uv/tlb_uv.c ---- linux-4.1.26.orig/arch/x86/platform/uv/tlb_uv.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/x86/platform/uv/tlb_uv.c 2016-06-19 15:30:58.619294727 +0200 -@@ -714,9 +714,9 @@ +diff --git a/arch/x86/platform/uv/tlb_uv.c b/arch/x86/platform/uv/tlb_uv.c +index 3b6ec42718e4..7871083de089 100644 +--- a/arch/x86/platform/uv/tlb_uv.c ++++ b/arch/x86/platform/uv/tlb_uv.c +@@ -714,9 +714,9 @@ static void destination_plugged(struct bau_desc *bau_desc, quiesce_local_uvhub(hmaster); @@ -4389,7 +5283,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/platform/uv/tlb_uv.c linux-4.1.26/arch/x86/ end_uvhub_quiesce(hmaster); -@@ -736,9 +736,9 @@ +@@ -736,9 +736,9 @@ static void destination_timeout(struct bau_desc *bau_desc, quiesce_local_uvhub(hmaster); @@ -4401,7 +5295,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/platform/uv/tlb_uv.c linux-4.1.26/arch/x86/ end_uvhub_quiesce(hmaster); -@@ -759,7 +759,7 @@ +@@ -759,7 +759,7 @@ static void disable_for_period(struct bau_control *bcp, struct ptc_stats *stat) cycles_t tm1; hmaster = bcp->uvhub_master; @@ -4410,7 +5304,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/platform/uv/tlb_uv.c linux-4.1.26/arch/x86/ if (!bcp->baudisabled) { stat->s_bau_disabled++; tm1 = get_cycles(); -@@ -772,7 +772,7 @@ +@@ -772,7 +772,7 @@ static void disable_for_period(struct bau_control *bcp, struct ptc_stats *stat) } } } @@ -4419,7 +5313,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/platform/uv/tlb_uv.c linux-4.1.26/arch/x86/ } static void count_max_concurr(int stat, struct bau_control *bcp, -@@ -835,7 +835,7 @@ +@@ -835,7 +835,7 @@ static void record_send_stats(cycles_t time1, cycles_t time2, */ static void uv1_throttle(struct bau_control *hmaster, struct ptc_stats *stat) { @@ -4428,7 +5322,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/platform/uv/tlb_uv.c linux-4.1.26/arch/x86/ atomic_t *v; v = &hmaster->active_descriptor_count; -@@ -968,7 +968,7 @@ +@@ -968,7 +968,7 @@ static int check_enable(struct bau_control *bcp, struct ptc_stats *stat) struct bau_control *hmaster; hmaster = bcp->uvhub_master; @@ -4437,7 +5331,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/platform/uv/tlb_uv.c linux-4.1.26/arch/x86/ if (bcp->baudisabled && (get_cycles() >= bcp->set_bau_on_time)) { stat->s_bau_reenabled++; for_each_present_cpu(tcpu) { -@@ -980,10 +980,10 @@ +@@ -980,10 +980,10 @@ static int check_enable(struct bau_control *bcp, struct ptc_stats *stat) tbcp->period_giveups = 0; } } @@ -4450,7 +5344,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/platform/uv/tlb_uv.c linux-4.1.26/arch/x86/ return -1; } -@@ -1901,9 +1901,9 @@ +@@ -1901,9 +1901,9 @@ static void __init init_per_cpu_tunables(void) bcp->cong_reps = congested_reps; bcp->disabled_period = sec_2_cycles(disabled_period); bcp->giveup_limit = giveup_limit; @@ -4463,10 +5357,11 @@ diff -Nur linux-4.1.26.orig/arch/x86/platform/uv/tlb_uv.c linux-4.1.26/arch/x86/ } } -diff -Nur linux-4.1.26.orig/arch/x86/platform/uv/uv_time.c linux-4.1.26/arch/x86/platform/uv/uv_time.c ---- linux-4.1.26.orig/arch/x86/platform/uv/uv_time.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/x86/platform/uv/uv_time.c 2016-06-19 15:30:58.623294881 +0200 -@@ -58,7 +58,7 @@ +diff --git a/arch/x86/platform/uv/uv_time.c b/arch/x86/platform/uv/uv_time.c +index a244237f3cfa..a718fe0d2e73 100644 +--- a/arch/x86/platform/uv/uv_time.c ++++ b/arch/x86/platform/uv/uv_time.c +@@ -58,7 +58,7 @@ static DEFINE_PER_CPU(struct clock_event_device, cpu_ced); /* There is one of these allocated per node */ struct uv_rtc_timer_head { @@ -4475,7 +5370,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/platform/uv/uv_time.c linux-4.1.26/arch/x86 /* next cpu waiting for timer, local node relative: */ int next_cpu; /* number of cpus on this node: */ -@@ -178,7 +178,7 @@ +@@ -178,7 +178,7 @@ static __init int uv_rtc_allocate_timers(void) uv_rtc_deallocate_timers(); return -ENOMEM; } @@ -4484,7 +5379,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/platform/uv/uv_time.c linux-4.1.26/arch/x86 head->ncpus = uv_blade_nr_possible_cpus(bid); head->next_cpu = -1; blade_info[bid] = head; -@@ -232,7 +232,7 @@ +@@ -232,7 +232,7 @@ static int uv_rtc_set_timer(int cpu, u64 expires) unsigned long flags; int next_cpu; @@ -4493,7 +5388,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/platform/uv/uv_time.c linux-4.1.26/arch/x86 next_cpu = head->next_cpu; *t = expires; -@@ -244,12 +244,12 @@ +@@ -244,12 +244,12 @@ static int uv_rtc_set_timer(int cpu, u64 expires) if (uv_setup_intr(cpu, expires)) { *t = ULLONG_MAX; uv_rtc_find_next_timer(head, pnode); @@ -4508,7 +5403,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/platform/uv/uv_time.c linux-4.1.26/arch/x86 return 0; } -@@ -268,7 +268,7 @@ +@@ -268,7 +268,7 @@ static int uv_rtc_unset_timer(int cpu, int force) unsigned long flags; int rc = 0; @@ -4517,7 +5412,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/platform/uv/uv_time.c linux-4.1.26/arch/x86 if ((head->next_cpu == bcpu && uv_read_rtc(NULL) >= *t) || force) rc = 1; -@@ -280,7 +280,7 @@ +@@ -280,7 +280,7 @@ static int uv_rtc_unset_timer(int cpu, int force) uv_rtc_find_next_timer(head, pnode); } @@ -4526,7 +5421,7 @@ diff -Nur linux-4.1.26.orig/arch/x86/platform/uv/uv_time.c linux-4.1.26/arch/x86 return rc; } -@@ -300,13 +300,18 @@ +@@ -300,13 +300,18 @@ static int uv_rtc_unset_timer(int cpu, int force) static cycle_t uv_read_rtc(struct clocksource *cs) { unsigned long offset; @@ -4546,9 +5441,10 @@ diff -Nur linux-4.1.26.orig/arch/x86/platform/uv/uv_time.c linux-4.1.26/arch/x86 } /* -diff -Nur linux-4.1.26.orig/arch/xtensa/mm/fault.c linux-4.1.26/arch/xtensa/mm/fault.c ---- linux-4.1.26.orig/arch/xtensa/mm/fault.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/xtensa/mm/fault.c 2016-06-19 15:30:58.623294881 +0200 +diff --git a/arch/xtensa/mm/fault.c b/arch/xtensa/mm/fault.c +index 9e3571a6535c..83a44a33cfa1 100644 +--- a/arch/xtensa/mm/fault.c ++++ b/arch/xtensa/mm/fault.c @@ -15,10 +15,10 @@ #include <linux/mm.h> #include <linux/module.h> @@ -4561,7 +5457,7 @@ diff -Nur linux-4.1.26.orig/arch/xtensa/mm/fault.c linux-4.1.26/arch/xtensa/mm/f #include <asm/pgalloc.h> DEFINE_PER_CPU(unsigned long, asid_cache) = ASID_USER_FIRST; -@@ -57,7 +57,7 @@ +@@ -57,7 +57,7 @@ void do_page_fault(struct pt_regs *regs) /* If we're in an interrupt or have no user * context, we must not take the fault.. */ @@ -4570,10 +5466,11 @@ diff -Nur linux-4.1.26.orig/arch/xtensa/mm/fault.c linux-4.1.26/arch/xtensa/mm/f bad_page_fault(regs, address, SIGSEGV); return; } -diff -Nur linux-4.1.26.orig/arch/xtensa/mm/highmem.c linux-4.1.26/arch/xtensa/mm/highmem.c ---- linux-4.1.26.orig/arch/xtensa/mm/highmem.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/arch/xtensa/mm/highmem.c 2016-06-19 15:30:58.623294881 +0200 -@@ -42,6 +42,7 @@ +diff --git a/arch/xtensa/mm/highmem.c b/arch/xtensa/mm/highmem.c +index 8cfb71ec0937..184ceadccc1a 100644 +--- a/arch/xtensa/mm/highmem.c ++++ b/arch/xtensa/mm/highmem.c +@@ -42,6 +42,7 @@ void *kmap_atomic(struct page *page) enum fixed_addresses idx; unsigned long vaddr; @@ -4581,7 +5478,7 @@ diff -Nur linux-4.1.26.orig/arch/xtensa/mm/highmem.c linux-4.1.26/arch/xtensa/mm pagefault_disable(); if (!PageHighMem(page)) return page_address(page); -@@ -79,6 +80,7 @@ +@@ -79,6 +80,7 @@ void __kunmap_atomic(void *kvaddr) } pagefault_enable(); @@ -4589,10 +5486,11 @@ diff -Nur linux-4.1.26.orig/arch/xtensa/mm/highmem.c linux-4.1.26/arch/xtensa/mm } EXPORT_SYMBOL(__kunmap_atomic); -diff -Nur linux-4.1.26.orig/block/blk-core.c linux-4.1.26/block/blk-core.c ---- linux-4.1.26.orig/block/blk-core.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/block/blk-core.c 2016-06-19 15:30:58.623294881 +0200 -@@ -100,6 +100,9 @@ +diff --git a/block/blk-core.c b/block/blk-core.c +index bbbf36e6066b..24935f6ca5bb 100644 +--- a/block/blk-core.c ++++ b/block/blk-core.c +@@ -100,6 +100,9 @@ void blk_rq_init(struct request_queue *q, struct request *rq) INIT_LIST_HEAD(&rq->queuelist); INIT_LIST_HEAD(&rq->timeout_list); @@ -4602,7 +5500,7 @@ diff -Nur linux-4.1.26.orig/block/blk-core.c linux-4.1.26/block/blk-core.c rq->cpu = -1; rq->q = q; rq->__sector = (sector_t) -1; -@@ -194,7 +197,7 @@ +@@ -194,7 +197,7 @@ EXPORT_SYMBOL(blk_delay_queue); **/ void blk_start_queue(struct request_queue *q) { @@ -4611,7 +5509,7 @@ diff -Nur linux-4.1.26.orig/block/blk-core.c linux-4.1.26/block/blk-core.c queue_flag_clear(QUEUE_FLAG_STOPPED, q); __blk_run_queue(q); -@@ -661,7 +664,7 @@ +@@ -663,7 +666,7 @@ struct request_queue *blk_alloc_queue_node(gfp_t gfp_mask, int node_id) q->bypass_depth = 1; __set_bit(QUEUE_FLAG_BYPASS, &q->queue_flags); @@ -4620,7 +5518,7 @@ diff -Nur linux-4.1.26.orig/block/blk-core.c linux-4.1.26/block/blk-core.c if (blkcg_init_queue(q)) goto fail_bdi; -@@ -3077,7 +3080,7 @@ +@@ -3079,7 +3082,7 @@ static void queue_unplugged(struct request_queue *q, unsigned int depth, blk_run_queue_async(q); else __blk_run_queue(q); @@ -4629,7 +5527,7 @@ diff -Nur linux-4.1.26.orig/block/blk-core.c linux-4.1.26/block/blk-core.c } static void flush_plug_callbacks(struct blk_plug *plug, bool from_schedule) -@@ -3125,7 +3128,6 @@ +@@ -3127,7 +3130,6 @@ EXPORT_SYMBOL(blk_check_plugged); void blk_flush_plug_list(struct blk_plug *plug, bool from_schedule) { struct request_queue *q; @@ -4637,7 +5535,7 @@ diff -Nur linux-4.1.26.orig/block/blk-core.c linux-4.1.26/block/blk-core.c struct request *rq; LIST_HEAD(list); unsigned int depth; -@@ -3145,11 +3147,6 @@ +@@ -3147,11 +3149,6 @@ void blk_flush_plug_list(struct blk_plug *plug, bool from_schedule) q = NULL; depth = 0; @@ -4649,7 +5547,7 @@ diff -Nur linux-4.1.26.orig/block/blk-core.c linux-4.1.26/block/blk-core.c while (!list_empty(&list)) { rq = list_entry_rq(list.next); list_del_init(&rq->queuelist); -@@ -3162,7 +3159,7 @@ +@@ -3164,7 +3161,7 @@ void blk_flush_plug_list(struct blk_plug *plug, bool from_schedule) queue_unplugged(q, depth, from_schedule); q = rq->q; depth = 0; @@ -4658,7 +5556,7 @@ diff -Nur linux-4.1.26.orig/block/blk-core.c linux-4.1.26/block/blk-core.c } /* -@@ -3189,8 +3186,6 @@ +@@ -3191,8 +3188,6 @@ void blk_flush_plug_list(struct blk_plug *plug, bool from_schedule) */ if (q) queue_unplugged(q, depth, from_schedule); @@ -4667,9 +5565,10 @@ diff -Nur linux-4.1.26.orig/block/blk-core.c linux-4.1.26/block/blk-core.c } void blk_finish_plug(struct blk_plug *plug) -diff -Nur linux-4.1.26.orig/block/blk-ioc.c linux-4.1.26/block/blk-ioc.c ---- linux-4.1.26.orig/block/blk-ioc.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/block/blk-ioc.c 2016-06-19 15:30:58.623294881 +0200 +diff --git a/block/blk-ioc.c b/block/blk-ioc.c +index 1a27f45ec776..28f467e636cc 100644 +--- a/block/blk-ioc.c ++++ b/block/blk-ioc.c @@ -7,6 +7,7 @@ #include <linux/bio.h> #include <linux/blkdev.h> @@ -4678,7 +5577,7 @@ diff -Nur linux-4.1.26.orig/block/blk-ioc.c linux-4.1.26/block/blk-ioc.c #include "blk.h" -@@ -109,7 +110,7 @@ +@@ -109,7 +110,7 @@ static void ioc_release_fn(struct work_struct *work) spin_unlock(q->queue_lock); } else { spin_unlock_irqrestore(&ioc->lock, flags); @@ -4687,7 +5586,7 @@ diff -Nur linux-4.1.26.orig/block/blk-ioc.c linux-4.1.26/block/blk-ioc.c spin_lock_irqsave_nested(&ioc->lock, flags, 1); } } -@@ -187,7 +188,7 @@ +@@ -187,7 +188,7 @@ retry: spin_unlock(icq->q->queue_lock); } else { spin_unlock_irqrestore(&ioc->lock, flags); @@ -4696,10 +5595,11 @@ diff -Nur linux-4.1.26.orig/block/blk-ioc.c linux-4.1.26/block/blk-ioc.c goto retry; } } -diff -Nur linux-4.1.26.orig/block/blk-iopoll.c linux-4.1.26/block/blk-iopoll.c ---- linux-4.1.26.orig/block/blk-iopoll.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/block/blk-iopoll.c 2016-06-19 15:30:58.623294881 +0200 -@@ -35,6 +35,7 @@ +diff --git a/block/blk-iopoll.c b/block/blk-iopoll.c +index 0736729d6494..3e21e31d0d7e 100644 +--- a/block/blk-iopoll.c ++++ b/block/blk-iopoll.c +@@ -35,6 +35,7 @@ void blk_iopoll_sched(struct blk_iopoll *iop) list_add_tail(&iop->list, this_cpu_ptr(&blk_cpu_iopoll)); __raise_softirq_irqoff(BLOCK_IOPOLL_SOFTIRQ); local_irq_restore(flags); @@ -4707,7 +5607,7 @@ diff -Nur linux-4.1.26.orig/block/blk-iopoll.c linux-4.1.26/block/blk-iopoll.c } EXPORT_SYMBOL(blk_iopoll_sched); -@@ -132,6 +133,7 @@ +@@ -132,6 +133,7 @@ static void blk_iopoll_softirq(struct softirq_action *h) __raise_softirq_irqoff(BLOCK_IOPOLL_SOFTIRQ); local_irq_enable(); @@ -4715,7 +5615,7 @@ diff -Nur linux-4.1.26.orig/block/blk-iopoll.c linux-4.1.26/block/blk-iopoll.c } /** -@@ -201,6 +203,7 @@ +@@ -201,6 +203,7 @@ static int blk_iopoll_cpu_notify(struct notifier_block *self, this_cpu_ptr(&blk_cpu_iopoll)); __raise_softirq_irqoff(BLOCK_IOPOLL_SOFTIRQ); local_irq_enable(); @@ -4723,10 +5623,66 @@ diff -Nur linux-4.1.26.orig/block/blk-iopoll.c linux-4.1.26/block/blk-iopoll.c } return NOTIFY_OK; -diff -Nur linux-4.1.26.orig/block/blk-mq.c linux-4.1.26/block/blk-mq.c ---- linux-4.1.26.orig/block/blk-mq.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/block/blk-mq.c 2016-06-19 15:30:58.623294881 +0200 -@@ -88,7 +88,7 @@ +diff --git a/block/blk-mq-cpu.c b/block/blk-mq-cpu.c +index bb3ed488f7b5..628c6c13c482 100644 +--- a/block/blk-mq-cpu.c ++++ b/block/blk-mq-cpu.c +@@ -16,7 +16,7 @@ + #include "blk-mq.h" + + static LIST_HEAD(blk_mq_cpu_notify_list); +-static DEFINE_RAW_SPINLOCK(blk_mq_cpu_notify_lock); ++static DEFINE_SPINLOCK(blk_mq_cpu_notify_lock); + + static int blk_mq_main_cpu_notify(struct notifier_block *self, + unsigned long action, void *hcpu) +@@ -25,7 +25,10 @@ static int blk_mq_main_cpu_notify(struct notifier_block *self, + struct blk_mq_cpu_notifier *notify; + int ret = NOTIFY_OK; + +- raw_spin_lock(&blk_mq_cpu_notify_lock); ++ if (action != CPU_POST_DEAD) ++ return NOTIFY_OK; ++ ++ spin_lock(&blk_mq_cpu_notify_lock); + + list_for_each_entry(notify, &blk_mq_cpu_notify_list, list) { + ret = notify->notify(notify->data, action, cpu); +@@ -33,7 +36,7 @@ static int blk_mq_main_cpu_notify(struct notifier_block *self, + break; + } + +- raw_spin_unlock(&blk_mq_cpu_notify_lock); ++ spin_unlock(&blk_mq_cpu_notify_lock); + return ret; + } + +@@ -41,16 +44,16 @@ void blk_mq_register_cpu_notifier(struct blk_mq_cpu_notifier *notifier) + { + BUG_ON(!notifier->notify); + +- raw_spin_lock(&blk_mq_cpu_notify_lock); ++ spin_lock(&blk_mq_cpu_notify_lock); + list_add_tail(¬ifier->list, &blk_mq_cpu_notify_list); +- raw_spin_unlock(&blk_mq_cpu_notify_lock); ++ spin_unlock(&blk_mq_cpu_notify_lock); + } + + void blk_mq_unregister_cpu_notifier(struct blk_mq_cpu_notifier *notifier) + { +- raw_spin_lock(&blk_mq_cpu_notify_lock); ++ spin_lock(&blk_mq_cpu_notify_lock); + list_del(¬ifier->list); +- raw_spin_unlock(&blk_mq_cpu_notify_lock); ++ spin_unlock(&blk_mq_cpu_notify_lock); + } + + void blk_mq_init_cpu_notifier(struct blk_mq_cpu_notifier *notifier, +diff --git a/block/blk-mq.c b/block/blk-mq.c +index 2dc1fd6c5bdb..c473bd192a41 100644 +--- a/block/blk-mq.c ++++ b/block/blk-mq.c +@@ -88,7 +88,7 @@ static int blk_mq_queue_enter(struct request_queue *q, gfp_t gfp) if (!(gfp & __GFP_WAIT)) return -EBUSY; @@ -4735,7 +5691,7 @@ diff -Nur linux-4.1.26.orig/block/blk-mq.c linux-4.1.26/block/blk-mq.c !q->mq_freeze_depth || blk_queue_dying(q)); if (blk_queue_dying(q)) return -ENODEV; -@@ -107,7 +107,7 @@ +@@ -107,7 +107,7 @@ static void blk_mq_usage_counter_release(struct percpu_ref *ref) struct request_queue *q = container_of(ref, struct request_queue, mq_usage_counter); @@ -4744,7 +5700,7 @@ diff -Nur linux-4.1.26.orig/block/blk-mq.c linux-4.1.26/block/blk-mq.c } void blk_mq_freeze_queue_start(struct request_queue *q) -@@ -127,7 +127,7 @@ +@@ -127,7 +127,7 @@ EXPORT_SYMBOL_GPL(blk_mq_freeze_queue_start); static void blk_mq_freeze_queue_wait(struct request_queue *q) { @@ -4753,7 +5709,7 @@ diff -Nur linux-4.1.26.orig/block/blk-mq.c linux-4.1.26/block/blk-mq.c } /* -@@ -151,7 +151,7 @@ +@@ -151,7 +151,7 @@ void blk_mq_unfreeze_queue(struct request_queue *q) spin_unlock_irq(q->queue_lock); if (wake) { percpu_ref_reinit(&q->mq_usage_counter); @@ -4762,7 +5718,7 @@ diff -Nur linux-4.1.26.orig/block/blk-mq.c linux-4.1.26/block/blk-mq.c } } EXPORT_SYMBOL_GPL(blk_mq_unfreeze_queue); -@@ -170,7 +170,7 @@ +@@ -170,7 +170,7 @@ void blk_mq_wake_waiters(struct request_queue *q) * dying, we need to ensure that processes currently waiting on * the queue are notified as well. */ @@ -4771,7 +5727,7 @@ diff -Nur linux-4.1.26.orig/block/blk-mq.c linux-4.1.26/block/blk-mq.c } bool blk_mq_can_queue(struct blk_mq_hw_ctx *hctx) -@@ -217,6 +217,9 @@ +@@ -217,6 +217,9 @@ static void blk_mq_rq_ctx_init(struct request_queue *q, struct blk_mq_ctx *ctx, rq->resid_len = 0; rq->sense = NULL; @@ -4781,7 +5737,7 @@ diff -Nur linux-4.1.26.orig/block/blk-mq.c linux-4.1.26/block/blk-mq.c INIT_LIST_HEAD(&rq->timeout_list); rq->timeout = 0; -@@ -346,6 +349,17 @@ +@@ -346,6 +349,17 @@ void blk_mq_end_request(struct request *rq, int error) } EXPORT_SYMBOL(blk_mq_end_request); @@ -4799,7 +5755,7 @@ diff -Nur linux-4.1.26.orig/block/blk-mq.c linux-4.1.26/block/blk-mq.c static void __blk_mq_complete_request_remote(void *data) { struct request *rq = data; -@@ -353,6 +367,8 @@ +@@ -353,6 +367,8 @@ static void __blk_mq_complete_request_remote(void *data) rq->q->softirq_done_fn(rq); } @@ -4808,7 +5764,7 @@ diff -Nur linux-4.1.26.orig/block/blk-mq.c linux-4.1.26/block/blk-mq.c static void blk_mq_ipi_complete_request(struct request *rq) { struct blk_mq_ctx *ctx = rq->mq_ctx; -@@ -364,19 +380,23 @@ +@@ -364,19 +380,23 @@ static void blk_mq_ipi_complete_request(struct request *rq) return; } @@ -4834,7 +5790,7 @@ diff -Nur linux-4.1.26.orig/block/blk-mq.c linux-4.1.26/block/blk-mq.c } void __blk_mq_complete_request(struct request *rq) -@@ -905,14 +925,14 @@ +@@ -905,14 +925,14 @@ void blk_mq_run_hw_queue(struct blk_mq_hw_ctx *hctx, bool async) return; if (!async) { @@ -4852,7 +5808,7 @@ diff -Nur linux-4.1.26.orig/block/blk-mq.c linux-4.1.26/block/blk-mq.c } kblockd_schedule_delayed_work_on(blk_mq_hctx_next_cpu(hctx), -@@ -1589,7 +1609,7 @@ +@@ -1589,7 +1609,7 @@ static int blk_mq_hctx_notify(void *data, unsigned long action, { struct blk_mq_hw_ctx *hctx = data; @@ -4861,64 +5817,11 @@ diff -Nur linux-4.1.26.orig/block/blk-mq.c linux-4.1.26/block/blk-mq.c return blk_mq_hctx_cpu_offline(hctx, cpu); /* -diff -Nur linux-4.1.26.orig/block/blk-mq-cpu.c linux-4.1.26/block/blk-mq-cpu.c ---- linux-4.1.26.orig/block/blk-mq-cpu.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/block/blk-mq-cpu.c 2016-06-19 15:30:58.623294881 +0200 -@@ -16,7 +16,7 @@ - #include "blk-mq.h" - - static LIST_HEAD(blk_mq_cpu_notify_list); --static DEFINE_RAW_SPINLOCK(blk_mq_cpu_notify_lock); -+static DEFINE_SPINLOCK(blk_mq_cpu_notify_lock); - - static int blk_mq_main_cpu_notify(struct notifier_block *self, - unsigned long action, void *hcpu) -@@ -25,7 +25,10 @@ - struct blk_mq_cpu_notifier *notify; - int ret = NOTIFY_OK; - -- raw_spin_lock(&blk_mq_cpu_notify_lock); -+ if (action != CPU_POST_DEAD) -+ return NOTIFY_OK; -+ -+ spin_lock(&blk_mq_cpu_notify_lock); - - list_for_each_entry(notify, &blk_mq_cpu_notify_list, list) { - ret = notify->notify(notify->data, action, cpu); -@@ -33,7 +36,7 @@ - break; - } - -- raw_spin_unlock(&blk_mq_cpu_notify_lock); -+ spin_unlock(&blk_mq_cpu_notify_lock); - return ret; - } - -@@ -41,16 +44,16 @@ - { - BUG_ON(!notifier->notify); - -- raw_spin_lock(&blk_mq_cpu_notify_lock); -+ spin_lock(&blk_mq_cpu_notify_lock); - list_add_tail(¬ifier->list, &blk_mq_cpu_notify_list); -- raw_spin_unlock(&blk_mq_cpu_notify_lock); -+ spin_unlock(&blk_mq_cpu_notify_lock); - } - - void blk_mq_unregister_cpu_notifier(struct blk_mq_cpu_notifier *notifier) - { -- raw_spin_lock(&blk_mq_cpu_notify_lock); -+ spin_lock(&blk_mq_cpu_notify_lock); - list_del(¬ifier->list); -- raw_spin_unlock(&blk_mq_cpu_notify_lock); -+ spin_unlock(&blk_mq_cpu_notify_lock); - } - - void blk_mq_init_cpu_notifier(struct blk_mq_cpu_notifier *notifier, -diff -Nur linux-4.1.26.orig/block/blk-mq.h linux-4.1.26/block/blk-mq.h ---- linux-4.1.26.orig/block/blk-mq.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/block/blk-mq.h 2016-06-19 15:30:58.623294881 +0200 -@@ -76,7 +76,10 @@ +diff --git a/block/blk-mq.h b/block/blk-mq.h +index 6a48c4c0d8a2..4b7cbf0e6e82 100644 +--- a/block/blk-mq.h ++++ b/block/blk-mq.h +@@ -76,7 +76,10 @@ struct blk_align_bitmap { static inline struct blk_mq_ctx *__blk_mq_get_ctx(struct request_queue *q, unsigned int cpu) { @@ -4930,7 +5833,7 @@ diff -Nur linux-4.1.26.orig/block/blk-mq.h linux-4.1.26/block/blk-mq.h } /* -@@ -87,12 +90,12 @@ +@@ -87,12 +90,12 @@ static inline struct blk_mq_ctx *__blk_mq_get_ctx(struct request_queue *q, */ static inline struct blk_mq_ctx *blk_mq_get_ctx(struct request_queue *q) { @@ -4945,10 +5848,11 @@ diff -Nur linux-4.1.26.orig/block/blk-mq.h linux-4.1.26/block/blk-mq.h } struct blk_mq_alloc_data { -diff -Nur linux-4.1.26.orig/block/blk-softirq.c linux-4.1.26/block/blk-softirq.c ---- linux-4.1.26.orig/block/blk-softirq.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/block/blk-softirq.c 2016-06-19 15:30:58.623294881 +0200 -@@ -51,6 +51,7 @@ +diff --git a/block/blk-softirq.c b/block/blk-softirq.c +index 53b1737e978d..81c3c0a62edf 100644 +--- a/block/blk-softirq.c ++++ b/block/blk-softirq.c +@@ -51,6 +51,7 @@ static void trigger_softirq(void *data) raise_softirq_irqoff(BLOCK_SOFTIRQ); local_irq_restore(flags); @@ -4956,7 +5860,7 @@ diff -Nur linux-4.1.26.orig/block/blk-softirq.c linux-4.1.26/block/blk-softirq.c } /* -@@ -93,6 +94,7 @@ +@@ -93,6 +94,7 @@ static int blk_cpu_notify(struct notifier_block *self, unsigned long action, this_cpu_ptr(&blk_cpu_done)); raise_softirq_irqoff(BLOCK_SOFTIRQ); local_irq_enable(); @@ -4964,7 +5868,7 @@ diff -Nur linux-4.1.26.orig/block/blk-softirq.c linux-4.1.26/block/blk-softirq.c } return NOTIFY_OK; -@@ -150,6 +152,7 @@ +@@ -150,6 +152,7 @@ do_local: goto do_local; local_irq_restore(flags); @@ -4972,10 +5876,11 @@ diff -Nur linux-4.1.26.orig/block/blk-softirq.c linux-4.1.26/block/blk-softirq.c } /** -diff -Nur linux-4.1.26.orig/block/bounce.c linux-4.1.26/block/bounce.c ---- linux-4.1.26.orig/block/bounce.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/block/bounce.c 2016-06-19 15:30:58.623294881 +0200 -@@ -54,11 +54,11 @@ +diff --git a/block/bounce.c b/block/bounce.c +index ed9dd8067120..39d123e0a989 100644 +--- a/block/bounce.c ++++ b/block/bounce.c +@@ -54,11 +54,11 @@ static void bounce_copy_vec(struct bio_vec *to, unsigned char *vfrom) unsigned long flags; unsigned char *vto; @@ -4989,10 +5894,11 @@ diff -Nur linux-4.1.26.orig/block/bounce.c linux-4.1.26/block/bounce.c } #else /* CONFIG_HIGHMEM */ -diff -Nur linux-4.1.26.orig/crypto/algapi.c linux-4.1.26/crypto/algapi.c ---- linux-4.1.26.orig/crypto/algapi.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/crypto/algapi.c 2016-06-19 15:30:58.623294881 +0200 -@@ -695,13 +695,13 @@ +diff --git a/crypto/algapi.c b/crypto/algapi.c +index dda720c6ab08..1629b110dabd 100644 +--- a/crypto/algapi.c ++++ b/crypto/algapi.c +@@ -695,13 +695,13 @@ EXPORT_SYMBOL_GPL(crypto_spawn_tfm2); int crypto_register_notifier(struct notifier_block *nb) { @@ -5008,10 +5914,11 @@ diff -Nur linux-4.1.26.orig/crypto/algapi.c linux-4.1.26/crypto/algapi.c } EXPORT_SYMBOL_GPL(crypto_unregister_notifier); -diff -Nur linux-4.1.26.orig/crypto/api.c linux-4.1.26/crypto/api.c ---- linux-4.1.26.orig/crypto/api.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/crypto/api.c 2016-06-19 15:30:58.623294881 +0200 -@@ -31,7 +31,7 @@ +diff --git a/crypto/api.c b/crypto/api.c +index bbc147cb5dec..bc1a848f02ec 100644 +--- a/crypto/api.c ++++ b/crypto/api.c +@@ -31,7 +31,7 @@ EXPORT_SYMBOL_GPL(crypto_alg_list); DECLARE_RWSEM(crypto_alg_sem); EXPORT_SYMBOL_GPL(crypto_alg_sem); @@ -5020,7 +5927,7 @@ diff -Nur linux-4.1.26.orig/crypto/api.c linux-4.1.26/crypto/api.c EXPORT_SYMBOL_GPL(crypto_chain); static struct crypto_alg *crypto_larval_wait(struct crypto_alg *alg); -@@ -236,10 +236,10 @@ +@@ -236,10 +236,10 @@ int crypto_probing_notify(unsigned long val, void *v) { int ok; @@ -5033,10 +5940,11 @@ diff -Nur linux-4.1.26.orig/crypto/api.c linux-4.1.26/crypto/api.c } return ok; -diff -Nur linux-4.1.26.orig/crypto/internal.h linux-4.1.26/crypto/internal.h ---- linux-4.1.26.orig/crypto/internal.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/crypto/internal.h 2016-06-19 15:30:58.623294881 +0200 -@@ -48,7 +48,7 @@ +diff --git a/crypto/internal.h b/crypto/internal.h +index bd39bfc92eab..a5db167cba84 100644 +--- a/crypto/internal.h ++++ b/crypto/internal.h +@@ -48,7 +48,7 @@ struct crypto_larval { extern struct list_head crypto_alg_list; extern struct rw_semaphore crypto_alg_sem; @@ -5045,7 +5953,7 @@ diff -Nur linux-4.1.26.orig/crypto/internal.h linux-4.1.26/crypto/internal.h #ifdef CONFIG_PROC_FS void __init crypto_init_proc(void); -@@ -142,7 +142,7 @@ +@@ -142,7 +142,7 @@ static inline int crypto_is_moribund(struct crypto_alg *alg) static inline void crypto_notify(unsigned long val, void *v) { @@ -5054,291 +5962,11 @@ diff -Nur linux-4.1.26.orig/crypto/internal.h linux-4.1.26/crypto/internal.h } #endif /* _CRYPTO_INTERNAL_H */ -diff -Nur linux-4.1.26.orig/Documentation/hwlat_detector.txt linux-4.1.26/Documentation/hwlat_detector.txt ---- linux-4.1.26.orig/Documentation/hwlat_detector.txt 1970-01-01 01:00:00.000000000 +0100 -+++ linux-4.1.26/Documentation/hwlat_detector.txt 2016-06-19 15:30:54.915151887 +0200 -@@ -0,0 +1,64 @@ -+Introduction: -+------------- -+ -+The module hwlat_detector is a special purpose kernel module that is used to -+detect large system latencies induced by the behavior of certain underlying -+hardware or firmware, independent of Linux itself. The code was developed -+originally to detect SMIs (System Management Interrupts) on x86 systems, -+however there is nothing x86 specific about this patchset. It was -+originally written for use by the "RT" patch since the Real Time -+kernel is highly latency sensitive. -+ -+SMIs are usually not serviced by the Linux kernel, which typically does not -+even know that they are occuring. SMIs are instead are set up by BIOS code -+and are serviced by BIOS code, usually for "critical" events such as -+management of thermal sensors and fans. Sometimes though, SMIs are used for -+other tasks and those tasks can spend an inordinate amount of time in the -+handler (sometimes measured in milliseconds). Obviously this is a problem if -+you are trying to keep event service latencies down in the microsecond range. -+ -+The hardware latency detector works by hogging all of the cpus for configurable -+amounts of time (by calling stop_machine()), polling the CPU Time Stamp Counter -+for some period, then looking for gaps in the TSC data. Any gap indicates a -+time when the polling was interrupted and since the machine is stopped and -+interrupts turned off the only thing that could do that would be an SMI. -+ -+Note that the SMI detector should *NEVER* be used in a production environment. -+It is intended to be run manually to determine if the hardware platform has a -+problem with long system firmware service routines. -+ -+Usage: -+------ -+ -+Loading the module hwlat_detector passing the parameter "enabled=1" (or by -+setting the "enable" entry in "hwlat_detector" debugfs toggled on) is the only -+step required to start the hwlat_detector. It is possible to redefine the -+threshold in microseconds (us) above which latency spikes will be taken -+into account (parameter "threshold="). -+ -+Example: -+ -+ # modprobe hwlat_detector enabled=1 threshold=100 -+ -+After the module is loaded, it creates a directory named "hwlat_detector" under -+the debugfs mountpoint, "/debug/hwlat_detector" for this text. It is necessary -+to have debugfs mounted, which might be on /sys/debug on your system. -+ -+The /debug/hwlat_detector interface contains the following files: -+ -+count - number of latency spikes observed since last reset -+enable - a global enable/disable toggle (0/1), resets count -+max - maximum hardware latency actually observed (usecs) -+sample - a pipe from which to read current raw sample data -+ in the format <timestamp> <latency observed usecs> -+ (can be opened O_NONBLOCK for a single sample) -+threshold - minimum latency value to be considered (usecs) -+width - time period to sample with CPUs held (usecs) -+ must be less than the total window size (enforced) -+window - total period of sampling, width being inside (usecs) -+ -+By default we will set width to 500,000 and window to 1,000,000, meaning that -+we will sample every 1,000,000 usecs (1s) for 500,000 usecs (0.5s). If we -+observe any latencies that exceed the threshold (initially 100 usecs), -+then we write to a global sample ring buffer of 8K samples, which is -+consumed by reading from the "sample" (pipe) debugfs file interface. -diff -Nur linux-4.1.26.orig/Documentation/sysrq.txt linux-4.1.26/Documentation/sysrq.txt ---- linux-4.1.26.orig/Documentation/sysrq.txt 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/Documentation/sysrq.txt 2016-06-19 15:30:54.915151887 +0200 -@@ -59,10 +59,17 @@ - On other - If you know of the key combos for other architectures, please - let me know so I can add them to this section. - --On all - write a character to /proc/sysrq-trigger. e.g.: -- -+On all - write a character to /proc/sysrq-trigger, e.g.: - echo t > /proc/sysrq-trigger - -+On all - Enable network SysRq by writing a cookie to icmp_echo_sysrq, e.g. -+ echo 0x01020304 >/proc/sys/net/ipv4/icmp_echo_sysrq -+ Send an ICMP echo request with this pattern plus the particular -+ SysRq command key. Example: -+ # ping -c1 -s57 -p0102030468 -+ will trigger the SysRq-H (help) command. -+ -+ - * What are the 'command' keys? - ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ - 'b' - Will immediately reboot the system without syncing or unmounting -diff -Nur linux-4.1.26.orig/Documentation/trace/histograms.txt linux-4.1.26/Documentation/trace/histograms.txt ---- linux-4.1.26.orig/Documentation/trace/histograms.txt 1970-01-01 01:00:00.000000000 +0100 -+++ linux-4.1.26/Documentation/trace/histograms.txt 2016-06-19 15:30:54.915151887 +0200 -@@ -0,0 +1,186 @@ -+ Using the Linux Kernel Latency Histograms -+ -+ -+This document gives a short explanation how to enable, configure and use -+latency histograms. Latency histograms are primarily relevant in the -+context of real-time enabled kernels (CONFIG_PREEMPT/CONFIG_PREEMPT_RT) -+and are used in the quality management of the Linux real-time -+capabilities. -+ -+ -+* Purpose of latency histograms -+ -+A latency histogram continuously accumulates the frequencies of latency -+data. There are two types of histograms -+- potential sources of latencies -+- effective latencies -+ -+ -+* Potential sources of latencies -+ -+Potential sources of latencies are code segments where interrupts, -+preemption or both are disabled (aka critical sections). To create -+histograms of potential sources of latency, the kernel stores the time -+stamp at the start of a critical section, determines the time elapsed -+when the end of the section is reached, and increments the frequency -+counter of that latency value - irrespective of whether any concurrently -+running process is affected by latency or not. -+- Configuration items (in the Kernel hacking/Tracers submenu) -+ CONFIG_INTERRUPT_OFF_LATENCY -+ CONFIG_PREEMPT_OFF_LATENCY -+ -+ -+* Effective latencies -+ -+Effective latencies are actually occuring during wakeup of a process. To -+determine effective latencies, the kernel stores the time stamp when a -+process is scheduled to be woken up, and determines the duration of the -+wakeup time shortly before control is passed over to this process. Note -+that the apparent latency in user space may be somewhat longer, since the -+process may be interrupted after control is passed over to it but before -+the execution in user space takes place. Simply measuring the interval -+between enqueuing and wakeup may also not appropriate in cases when a -+process is scheduled as a result of a timer expiration. The timer may have -+missed its deadline, e.g. due to disabled interrupts, but this latency -+would not be registered. Therefore, the offsets of missed timers are -+recorded in a separate histogram. If both wakeup latency and missed timer -+offsets are configured and enabled, a third histogram may be enabled that -+records the overall latency as a sum of the timer latency, if any, and the -+wakeup latency. This histogram is called "timerandwakeup". -+- Configuration items (in the Kernel hacking/Tracers submenu) -+ CONFIG_WAKEUP_LATENCY -+ CONFIG_MISSED_TIMER_OFSETS -+ -+ -+* Usage -+ -+The interface to the administration of the latency histograms is located -+in the debugfs file system. To mount it, either enter -+ -+mount -t sysfs nodev /sys -+mount -t debugfs nodev /sys/kernel/debug -+ -+from shell command line level, or add -+ -+nodev /sys sysfs defaults 0 0 -+nodev /sys/kernel/debug debugfs defaults 0 0 -+ -+to the file /etc/fstab. All latency histogram related files are then -+available in the directory /sys/kernel/debug/tracing/latency_hist. A -+particular histogram type is enabled by writing non-zero to the related -+variable in the /sys/kernel/debug/tracing/latency_hist/enable directory. -+Select "preemptirqsoff" for the histograms of potential sources of -+latencies and "wakeup" for histograms of effective latencies etc. The -+histogram data - one per CPU - are available in the files -+ -+/sys/kernel/debug/tracing/latency_hist/preemptoff/CPUx -+/sys/kernel/debug/tracing/latency_hist/irqsoff/CPUx -+/sys/kernel/debug/tracing/latency_hist/preemptirqsoff/CPUx -+/sys/kernel/debug/tracing/latency_hist/wakeup/CPUx -+/sys/kernel/debug/tracing/latency_hist/wakeup/sharedprio/CPUx -+/sys/kernel/debug/tracing/latency_hist/missed_timer_offsets/CPUx -+/sys/kernel/debug/tracing/latency_hist/timerandwakeup/CPUx -+ -+The histograms are reset by writing non-zero to the file "reset" in a -+particular latency directory. To reset all latency data, use -+ -+#!/bin/sh -+ -+TRACINGDIR=/sys/kernel/debug/tracing -+HISTDIR=$TRACINGDIR/latency_hist -+ -+if test -d $HISTDIR -+then -+ cd $HISTDIR -+ for i in `find . | grep /reset$` -+ do -+ echo 1 >$i -+ done -+fi -+ -+ -+* Data format -+ -+Latency data are stored with a resolution of one microsecond. The -+maximum latency is 10,240 microseconds. The data are only valid, if the -+overflow register is empty. Every output line contains the latency in -+microseconds in the first row and the number of samples in the second -+row. To display only lines with a positive latency count, use, for -+example, -+ -+grep -v " 0$" /sys/kernel/debug/tracing/latency_hist/preemptoff/CPU0 -+ -+#Minimum latency: 0 microseconds. -+#Average latency: 0 microseconds. -+#Maximum latency: 25 microseconds. -+#Total samples: 3104770694 -+#There are 0 samples greater or equal than 10240 microseconds -+#usecs samples -+ 0 2984486876 -+ 1 49843506 -+ 2 58219047 -+ 3 5348126 -+ 4 2187960 -+ 5 3388262 -+ 6 959289 -+ 7 208294 -+ 8 40420 -+ 9 4485 -+ 10 14918 -+ 11 18340 -+ 12 25052 -+ 13 19455 -+ 14 5602 -+ 15 969 -+ 16 47 -+ 17 18 -+ 18 14 -+ 19 1 -+ 20 3 -+ 21 2 -+ 22 5 -+ 23 2 -+ 25 1 -+ -+ -+* Wakeup latency of a selected process -+ -+To only collect wakeup latency data of a particular process, write the -+PID of the requested process to -+ -+/sys/kernel/debug/tracing/latency_hist/wakeup/pid -+ -+PIDs are not considered, if this variable is set to 0. -+ -+ -+* Details of the process with the highest wakeup latency so far -+ -+Selected data of the process that suffered from the highest wakeup -+latency that occurred in a particular CPU are available in the file -+ -+/sys/kernel/debug/tracing/latency_hist/wakeup/max_latency-CPUx. -+ -+In addition, other relevant system data at the time when the -+latency occurred are given. -+ -+The format of the data is (all in one line): -+<PID> <Priority> <Latency> (<Timeroffset>) <Command> \ -+<- <PID> <Priority> <Command> <Timestamp> -+ -+The value of <Timeroffset> is only relevant in the combined timer -+and wakeup latency recording. In the wakeup recording, it is -+always 0, in the missed_timer_offsets recording, it is the same -+as <Latency>. -+ -+When retrospectively searching for the origin of a latency and -+tracing was not enabled, it may be helpful to know the name and -+some basic data of the task that (finally) was switching to the -+late real-tlme task. In addition to the victim's data, also the -+data of the possible culprit are therefore displayed after the -+"<-" symbol. -+ -+Finally, the timestamp of the time when the latency occurred -+in <seconds>.<microseconds> after the most recent system boot -+is provided. -+ -+These data are also reset when the wakeup histogram is reset. -diff -Nur linux-4.1.26.orig/drivers/acpi/acpica/acglobal.h linux-4.1.26/drivers/acpi/acpica/acglobal.h ---- linux-4.1.26.orig/drivers/acpi/acpica/acglobal.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/acpi/acpica/acglobal.h 2016-06-19 15:30:58.627295036 +0200 -@@ -112,7 +112,7 @@ +diff --git a/drivers/acpi/acpica/acglobal.h b/drivers/acpi/acpica/acglobal.h +index a0c478784314..166ee955405f 100644 +--- a/drivers/acpi/acpica/acglobal.h ++++ b/drivers/acpi/acpica/acglobal.h +@@ -112,7 +112,7 @@ ACPI_GLOBAL(u8, acpi_gbl_global_lock_pending); * interrupt level */ ACPI_GLOBAL(acpi_spinlock, acpi_gbl_gpe_lock); /* For GPE data structs and registers */ @@ -5347,10 +5975,11 @@ diff -Nur linux-4.1.26.orig/drivers/acpi/acpica/acglobal.h linux-4.1.26/drivers/ ACPI_GLOBAL(acpi_spinlock, acpi_gbl_reference_count_lock); /* Mutex for _OSI support */ -diff -Nur linux-4.1.26.orig/drivers/acpi/acpica/hwregs.c linux-4.1.26/drivers/acpi/acpica/hwregs.c ---- linux-4.1.26.orig/drivers/acpi/acpica/hwregs.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/acpi/acpica/hwregs.c 2016-06-19 15:30:58.627295036 +0200 -@@ -269,14 +269,14 @@ +diff --git a/drivers/acpi/acpica/hwregs.c b/drivers/acpi/acpica/hwregs.c +index 3cf77afd142c..dc32e72132f1 100644 +--- a/drivers/acpi/acpica/hwregs.c ++++ b/drivers/acpi/acpica/hwregs.c +@@ -269,14 +269,14 @@ acpi_status acpi_hw_clear_acpi_status(void) ACPI_BITMASK_ALL_FIXED_STATUS, ACPI_FORMAT_UINT64(acpi_gbl_xpm1a_status.address))); @@ -5367,10 +5996,11 @@ diff -Nur linux-4.1.26.orig/drivers/acpi/acpica/hwregs.c linux-4.1.26/drivers/ac if (ACPI_FAILURE(status)) { goto exit; -diff -Nur linux-4.1.26.orig/drivers/acpi/acpica/hwxface.c linux-4.1.26/drivers/acpi/acpica/hwxface.c ---- linux-4.1.26.orig/drivers/acpi/acpica/hwxface.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/acpi/acpica/hwxface.c 2016-06-19 15:30:58.627295036 +0200 -@@ -374,7 +374,7 @@ +diff --git a/drivers/acpi/acpica/hwxface.c b/drivers/acpi/acpica/hwxface.c +index 5f97468df8ff..8c017f15da7d 100644 +--- a/drivers/acpi/acpica/hwxface.c ++++ b/drivers/acpi/acpica/hwxface.c +@@ -374,7 +374,7 @@ acpi_status acpi_write_bit_register(u32 register_id, u32 value) return_ACPI_STATUS(AE_BAD_PARAMETER); } @@ -5379,7 +6009,7 @@ diff -Nur linux-4.1.26.orig/drivers/acpi/acpica/hwxface.c linux-4.1.26/drivers/a /* * At this point, we know that the parent register is one of the -@@ -435,7 +435,7 @@ +@@ -435,7 +435,7 @@ acpi_status acpi_write_bit_register(u32 register_id, u32 value) unlock_and_exit: @@ -5388,10 +6018,11 @@ diff -Nur linux-4.1.26.orig/drivers/acpi/acpica/hwxface.c linux-4.1.26/drivers/a return_ACPI_STATUS(status); } -diff -Nur linux-4.1.26.orig/drivers/acpi/acpica/utmutex.c linux-4.1.26/drivers/acpi/acpica/utmutex.c ---- linux-4.1.26.orig/drivers/acpi/acpica/utmutex.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/acpi/acpica/utmutex.c 2016-06-19 15:30:58.627295036 +0200 -@@ -88,7 +88,7 @@ +diff --git a/drivers/acpi/acpica/utmutex.c b/drivers/acpi/acpica/utmutex.c +index 37b8b58fcd56..938795507d87 100644 +--- a/drivers/acpi/acpica/utmutex.c ++++ b/drivers/acpi/acpica/utmutex.c +@@ -88,7 +88,7 @@ acpi_status acpi_ut_mutex_initialize(void) return_ACPI_STATUS (status); } @@ -5400,7 +6031,7 @@ diff -Nur linux-4.1.26.orig/drivers/acpi/acpica/utmutex.c linux-4.1.26/drivers/a if (ACPI_FAILURE (status)) { return_ACPI_STATUS (status); } -@@ -141,7 +141,7 @@ +@@ -141,7 +141,7 @@ void acpi_ut_mutex_terminate(void) /* Delete the spinlocks */ acpi_os_delete_lock(acpi_gbl_gpe_lock); @@ -5409,10 +6040,11 @@ diff -Nur linux-4.1.26.orig/drivers/acpi/acpica/utmutex.c linux-4.1.26/drivers/a acpi_os_delete_lock(acpi_gbl_reference_count_lock); /* Delete the reader/writer lock */ -diff -Nur linux-4.1.26.orig/drivers/ata/libata-sff.c linux-4.1.26/drivers/ata/libata-sff.c ---- linux-4.1.26.orig/drivers/ata/libata-sff.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/ata/libata-sff.c 2016-06-19 15:30:58.627295036 +0200 -@@ -678,9 +678,9 @@ +diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c +index 7dbba387d12a..65beb7abb4e7 100644 +--- a/drivers/ata/libata-sff.c ++++ b/drivers/ata/libata-sff.c +@@ -678,9 +678,9 @@ unsigned int ata_sff_data_xfer_noirq(struct ata_device *dev, unsigned char *buf, unsigned long flags; unsigned int consumed; @@ -5424,7 +6056,7 @@ diff -Nur linux-4.1.26.orig/drivers/ata/libata-sff.c linux-4.1.26/drivers/ata/li return consumed; } -@@ -719,7 +719,7 @@ +@@ -719,7 +719,7 @@ static void ata_pio_sector(struct ata_queued_cmd *qc) unsigned long flags; /* FIXME: use a bounce buffer */ @@ -5433,7 +6065,7 @@ diff -Nur linux-4.1.26.orig/drivers/ata/libata-sff.c linux-4.1.26/drivers/ata/li buf = kmap_atomic(page); /* do the actual data transfer */ -@@ -727,7 +727,7 @@ +@@ -727,7 +727,7 @@ static void ata_pio_sector(struct ata_queued_cmd *qc) do_write); kunmap_atomic(buf); @@ -5442,7 +6074,7 @@ diff -Nur linux-4.1.26.orig/drivers/ata/libata-sff.c linux-4.1.26/drivers/ata/li } else { buf = page_address(page); ap->ops->sff_data_xfer(qc->dev, buf + offset, qc->sect_size, -@@ -864,7 +864,7 @@ +@@ -864,7 +864,7 @@ next_sg: unsigned long flags; /* FIXME: use bounce buffer */ @@ -5451,7 +6083,7 @@ diff -Nur linux-4.1.26.orig/drivers/ata/libata-sff.c linux-4.1.26/drivers/ata/li buf = kmap_atomic(page); /* do the actual data transfer */ -@@ -872,7 +872,7 @@ +@@ -872,7 +872,7 @@ next_sg: count, rw); kunmap_atomic(buf); @@ -5460,10 +6092,175 @@ diff -Nur linux-4.1.26.orig/drivers/ata/libata-sff.c linux-4.1.26/drivers/ata/li } else { buf = page_address(page); consumed = ap->ops->sff_data_xfer(dev, buf + offset, -diff -Nur linux-4.1.26.orig/drivers/char/random.c linux-4.1.26/drivers/char/random.c ---- linux-4.1.26.orig/drivers/char/random.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/char/random.c 2016-06-19 15:30:58.627295036 +0200 -@@ -776,8 +776,6 @@ +diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c +index 6e134f4759c0..d2782d492630 100644 +--- a/drivers/block/zram/zram_drv.c ++++ b/drivers/block/zram/zram_drv.c +@@ -386,6 +386,8 @@ static struct zram_meta *zram_meta_alloc(int device_id, u64 disksize) + goto out_error; + } + ++ zram_meta_init_table_locks(meta, disksize); ++ + return meta; + + out_error: +@@ -484,12 +486,12 @@ static int zram_decompress_page(struct zram *zram, char *mem, u32 index) + unsigned long handle; + size_t size; + +- bit_spin_lock(ZRAM_ACCESS, &meta->table[index].value); ++ zram_lock_table(&meta->table[index]); + handle = meta->table[index].handle; + size = zram_get_obj_size(meta, index); + + if (!handle || zram_test_flag(meta, index, ZRAM_ZERO)) { +- bit_spin_unlock(ZRAM_ACCESS, &meta->table[index].value); ++ zram_unlock_table(&meta->table[index]); + clear_page(mem); + return 0; + } +@@ -500,7 +502,7 @@ static int zram_decompress_page(struct zram *zram, char *mem, u32 index) + else + ret = zcomp_decompress(zram->comp, cmem, size, mem); + zs_unmap_object(meta->mem_pool, handle); +- bit_spin_unlock(ZRAM_ACCESS, &meta->table[index].value); ++ zram_unlock_table(&meta->table[index]); + + /* Should NEVER happen. Return bio error if it does. */ + if (unlikely(ret)) { +@@ -520,14 +522,14 @@ static int zram_bvec_read(struct zram *zram, struct bio_vec *bvec, + struct zram_meta *meta = zram->meta; + page = bvec->bv_page; + +- bit_spin_lock(ZRAM_ACCESS, &meta->table[index].value); ++ zram_lock_table(&meta->table[index]); + if (unlikely(!meta->table[index].handle) || + zram_test_flag(meta, index, ZRAM_ZERO)) { +- bit_spin_unlock(ZRAM_ACCESS, &meta->table[index].value); ++ zram_unlock_table(&meta->table[index]); + handle_zero_page(bvec); + return 0; + } +- bit_spin_unlock(ZRAM_ACCESS, &meta->table[index].value); ++ zram_unlock_table(&meta->table[index]); + + if (is_partial_io(bvec)) + /* Use a temporary buffer to decompress the page */ +@@ -622,10 +624,10 @@ static int zram_bvec_write(struct zram *zram, struct bio_vec *bvec, u32 index, + if (user_mem) + kunmap_atomic(user_mem); + /* Free memory associated with this sector now. */ +- bit_spin_lock(ZRAM_ACCESS, &meta->table[index].value); ++ zram_lock_table(&meta->table[index]); + zram_free_page(zram, index); + zram_set_flag(meta, index, ZRAM_ZERO); +- bit_spin_unlock(ZRAM_ACCESS, &meta->table[index].value); ++ zram_unlock_table(&meta->table[index]); + + atomic64_inc(&zram->stats.zero_pages); + ret = 0; +@@ -685,12 +687,12 @@ static int zram_bvec_write(struct zram *zram, struct bio_vec *bvec, u32 index, + * Free memory associated with this sector + * before overwriting unused sectors. + */ +- bit_spin_lock(ZRAM_ACCESS, &meta->table[index].value); ++ zram_lock_table(&meta->table[index]); + zram_free_page(zram, index); + + meta->table[index].handle = handle; + zram_set_obj_size(meta, index, clen); +- bit_spin_unlock(ZRAM_ACCESS, &meta->table[index].value); ++ zram_unlock_table(&meta->table[index]); + + /* Update stats */ + atomic64_add(clen, &zram->stats.compr_data_size); +@@ -762,9 +764,9 @@ static void zram_bio_discard(struct zram *zram, u32 index, + } + + while (n >= PAGE_SIZE) { +- bit_spin_lock(ZRAM_ACCESS, &meta->table[index].value); ++ zram_lock_table(&meta->table[index]); + zram_free_page(zram, index); +- bit_spin_unlock(ZRAM_ACCESS, &meta->table[index].value); ++ zram_unlock_table(&meta->table[index]); + atomic64_inc(&zram->stats.notify_free); + index++; + n -= PAGE_SIZE; +@@ -1007,9 +1009,9 @@ static void zram_slot_free_notify(struct block_device *bdev, + zram = bdev->bd_disk->private_data; + meta = zram->meta; + +- bit_spin_lock(ZRAM_ACCESS, &meta->table[index].value); ++ zram_lock_table(&meta->table[index]); + zram_free_page(zram, index); +- bit_spin_unlock(ZRAM_ACCESS, &meta->table[index].value); ++ zram_unlock_table(&meta->table[index]); + atomic64_inc(&zram->stats.notify_free); + } + +diff --git a/drivers/block/zram/zram_drv.h b/drivers/block/zram/zram_drv.h +index 570c598f4ce9..22c0173b00e3 100644 +--- a/drivers/block/zram/zram_drv.h ++++ b/drivers/block/zram/zram_drv.h +@@ -78,6 +78,9 @@ enum zram_pageflags { + struct zram_table_entry { + unsigned long handle; + unsigned long value; ++#ifdef CONFIG_PREEMPT_RT_BASE ++ spinlock_t lock; ++#endif + }; + + struct zram_stats { +@@ -122,4 +125,42 @@ struct zram { + u64 disksize; /* bytes */ + char compressor[10]; + }; ++ ++#ifndef CONFIG_PREEMPT_RT_BASE ++static inline void zram_lock_table(struct zram_table_entry *table) ++{ ++ bit_spin_lock(ZRAM_ACCESS, &table->value); ++} ++ ++static inline void zram_unlock_table(struct zram_table_entry *table) ++{ ++ bit_spin_unlock(ZRAM_ACCESS, &table->value); ++} ++ ++static inline void zram_meta_init_table_locks(struct zram_meta *meta, u64 disksize) { } ++#else /* CONFIG_PREEMPT_RT_BASE */ ++static inline void zram_lock_table(struct zram_table_entry *table) ++{ ++ spin_lock(&table->lock); ++ __set_bit(ZRAM_ACCESS, &table->value); ++} ++ ++static inline void zram_unlock_table(struct zram_table_entry *table) ++{ ++ __clear_bit(ZRAM_ACCESS, &table->value); ++ spin_unlock(&table->lock); ++} ++ ++static inline void zram_meta_init_table_locks(struct zram_meta *meta, u64 disksize) ++{ ++ size_t num_pages = disksize >> PAGE_SHIFT; ++ size_t index; ++ ++ for (index = 0; index < num_pages; index++) { ++ spinlock_t *lock = &meta->table[index].lock; ++ spin_lock_init(lock); ++ } ++} ++#endif /* CONFIG_PREEMPT_RT_BASE */ ++ + #endif +diff --git a/drivers/char/random.c b/drivers/char/random.c +index 9cd6968e2f92..eb47efec2506 100644 +--- a/drivers/char/random.c ++++ b/drivers/char/random.c +@@ -776,8 +776,6 @@ static void add_timer_randomness(struct timer_rand_state *state, unsigned num) } sample; long delta, delta2, delta3; @@ -5472,7 +6269,7 @@ diff -Nur linux-4.1.26.orig/drivers/char/random.c linux-4.1.26/drivers/char/rand sample.jiffies = jiffies; sample.cycles = random_get_entropy(); sample.num = num; -@@ -818,7 +816,6 @@ +@@ -818,7 +816,6 @@ static void add_timer_randomness(struct timer_rand_state *state, unsigned num) */ credit_entropy_bits(r, min_t(int, fls(delta>>1), 11)); } @@ -5480,7 +6277,7 @@ diff -Nur linux-4.1.26.orig/drivers/char/random.c linux-4.1.26/drivers/char/rand } void add_input_randomness(unsigned int type, unsigned int code, -@@ -871,28 +868,27 @@ +@@ -871,28 +868,27 @@ static __u32 get_reg(struct fast_pool *f, struct pt_regs *regs) return *(ptr + f->reg_idx++); } @@ -5514,9 +6311,36 @@ diff -Nur linux-4.1.26.orig/drivers/char/random.c linux-4.1.26/drivers/char/rand fast_mix(fast_pool); add_interrupt_bench(cycles); -diff -Nur linux-4.1.26.orig/drivers/clocksource/tcb_clksrc.c linux-4.1.26/drivers/clocksource/tcb_clksrc.c ---- linux-4.1.26.orig/drivers/clocksource/tcb_clksrc.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/clocksource/tcb_clksrc.c 2016-06-19 15:30:58.627295036 +0200 +diff --git a/drivers/clk/at91/pmc.c b/drivers/clk/at91/pmc.c +index 3f27d21fb729..b83480f599ce 100644 +--- a/drivers/clk/at91/pmc.c ++++ b/drivers/clk/at91/pmc.c +@@ -27,21 +27,6 @@ + void __iomem *at91_pmc_base; + EXPORT_SYMBOL_GPL(at91_pmc_base); + +-void at91rm9200_idle(void) +-{ +- /* +- * Disable the processor clock. The processor will be automatically +- * re-enabled by an interrupt or by a reset. +- */ +- at91_pmc_write(AT91_PMC_SCDR, AT91_PMC_PCK); +-} +- +-void at91sam9_idle(void) +-{ +- at91_pmc_write(AT91_PMC_SCDR, AT91_PMC_PCK); +- cpu_do_idle(); +-} +- + int of_at91_get_clk_range(struct device_node *np, const char *propname, + struct clk_range *range) + { +diff --git a/drivers/clocksource/tcb_clksrc.c b/drivers/clocksource/tcb_clksrc.c +index 8bdbc45c6dad..43f1c6bc6e28 100644 +--- a/drivers/clocksource/tcb_clksrc.c ++++ b/drivers/clocksource/tcb_clksrc.c @@ -23,8 +23,7 @@ * this 32 bit free-running counter. the second channel is not used. * @@ -5527,7 +6351,7 @@ diff -Nur linux-4.1.26.orig/drivers/clocksource/tcb_clksrc.c linux-4.1.26/driver * * A boot clocksource and clockevent source are also currently needed, * unless the relevant platforms (ARM/AT91, AVR32/AT32) are changed so -@@ -74,6 +73,7 @@ +@@ -74,6 +73,7 @@ static struct clocksource clksrc = { struct tc_clkevt_device { struct clock_event_device clkevt; struct clk *clk; @@ -5535,7 +6359,7 @@ diff -Nur linux-4.1.26.orig/drivers/clocksource/tcb_clksrc.c linux-4.1.26/driver void __iomem *regs; }; -@@ -82,13 +82,6 @@ +@@ -82,13 +82,6 @@ static struct tc_clkevt_device *to_tc_clkevt(struct clock_event_device *clkevt) return container_of(clkevt, struct tc_clkevt_device, clkevt); } @@ -5549,7 +6373,7 @@ diff -Nur linux-4.1.26.orig/drivers/clocksource/tcb_clksrc.c linux-4.1.26/driver static u32 timer_clock; static void tc_mode(enum clock_event_mode m, struct clock_event_device *d) -@@ -111,11 +104,12 @@ +@@ -111,11 +104,12 @@ static void tc_mode(enum clock_event_mode m, struct clock_event_device *d) case CLOCK_EVT_MODE_PERIODIC: clk_enable(tcd->clk); @@ -5564,7 +6388,7 @@ diff -Nur linux-4.1.26.orig/drivers/clocksource/tcb_clksrc.c linux-4.1.26/driver /* Enable clock and interrupts on RC compare */ __raw_writel(ATMEL_TC_CPCS, regs + ATMEL_TC_REG(2, IER)); -@@ -128,7 +122,7 @@ +@@ -128,7 +122,7 @@ static void tc_mode(enum clock_event_mode m, struct clock_event_device *d) case CLOCK_EVT_MODE_ONESHOT: clk_enable(tcd->clk); @@ -5573,7 +6397,7 @@ diff -Nur linux-4.1.26.orig/drivers/clocksource/tcb_clksrc.c linux-4.1.26/driver __raw_writel(timer_clock | ATMEL_TC_CPCSTOP | ATMEL_TC_WAVE | ATMEL_TC_WAVESEL_UP_AUTO, regs + ATMEL_TC_REG(2, CMR)); -@@ -157,8 +151,12 @@ +@@ -157,8 +151,12 @@ static struct tc_clkevt_device clkevt = { .name = "tc_clkevt", .features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT, @@ -5586,7 +6410,7 @@ diff -Nur linux-4.1.26.orig/drivers/clocksource/tcb_clksrc.c linux-4.1.26/driver .set_next_event = tc_next_event, .set_mode = tc_mode, }, -@@ -178,8 +176,9 @@ +@@ -178,8 +176,9 @@ static irqreturn_t ch2_irq(int irq, void *handle) return IRQ_NONE; } @@ -5597,7 +6421,7 @@ diff -Nur linux-4.1.26.orig/drivers/clocksource/tcb_clksrc.c linux-4.1.26/driver int ret; struct clk *t2_clk = tc->clk[2]; int irq = tc->irq[2]; -@@ -193,7 +192,11 @@ +@@ -193,7 +192,11 @@ static int __init setup_clkevents(struct atmel_tc *tc, int clk32k_divisor_idx) clkevt.regs = tc->regs; clkevt.clk = t2_clk; @@ -5610,7 +6434,7 @@ diff -Nur linux-4.1.26.orig/drivers/clocksource/tcb_clksrc.c linux-4.1.26/driver clkevt.clkevt.cpumask = cpumask_of(0); -@@ -203,7 +206,7 @@ +@@ -203,7 +206,7 @@ static int __init setup_clkevents(struct atmel_tc *tc, int clk32k_divisor_idx) return ret; } @@ -5619,7 +6443,7 @@ diff -Nur linux-4.1.26.orig/drivers/clocksource/tcb_clksrc.c linux-4.1.26/driver return ret; } -@@ -340,7 +343,11 @@ +@@ -340,7 +343,11 @@ static int __init tcb_clksrc_init(void) goto err_disable_t1; /* channel 2: periodic and oneshot timer support */ @@ -5631,10 +6455,11 @@ diff -Nur linux-4.1.26.orig/drivers/clocksource/tcb_clksrc.c linux-4.1.26/driver if (ret) goto err_unregister_clksrc; -diff -Nur linux-4.1.26.orig/drivers/clocksource/timer-atmel-pit.c linux-4.1.26/drivers/clocksource/timer-atmel-pit.c ---- linux-4.1.26.orig/drivers/clocksource/timer-atmel-pit.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/clocksource/timer-atmel-pit.c 2016-06-19 15:30:58.627295036 +0200 -@@ -90,6 +90,7 @@ +diff --git a/drivers/clocksource/timer-atmel-pit.c b/drivers/clocksource/timer-atmel-pit.c +index c0304ff608b0..6eb7bf435d9b 100644 +--- a/drivers/clocksource/timer-atmel-pit.c ++++ b/drivers/clocksource/timer-atmel-pit.c +@@ -90,6 +90,7 @@ static cycle_t read_pit_clk(struct clocksource *cs) return elapsed; } @@ -5642,7 +6467,7 @@ diff -Nur linux-4.1.26.orig/drivers/clocksource/timer-atmel-pit.c linux-4.1.26/d /* * Clockevent device: interrupts every 1/HZ (== pit_cycles * MCK/16) */ -@@ -100,6 +101,8 @@ +@@ -100,6 +101,8 @@ pit_clkevt_mode(enum clock_event_mode mode, struct clock_event_device *dev) switch (mode) { case CLOCK_EVT_MODE_PERIODIC: @@ -5651,7 +6476,7 @@ diff -Nur linux-4.1.26.orig/drivers/clocksource/timer-atmel-pit.c linux-4.1.26/d /* update clocksource counter */ data->cnt += data->cycle * PIT_PICNT(pit_read(data->base, AT91_PIT_PIVR)); pit_write(data->base, AT91_PIT_MR, -@@ -113,6 +116,7 @@ +@@ -113,6 +116,7 @@ pit_clkevt_mode(enum clock_event_mode mode, struct clock_event_device *dev) /* disable irq, leaving the clocksource active */ pit_write(data->base, AT91_PIT_MR, (data->cycle - 1) | AT91_PIT_PITEN); @@ -5659,10 +6484,11 @@ diff -Nur linux-4.1.26.orig/drivers/clocksource/timer-atmel-pit.c linux-4.1.26/d break; case CLOCK_EVT_MODE_RESUME: break; -diff -Nur linux-4.1.26.orig/drivers/clocksource/timer-atmel-st.c linux-4.1.26/drivers/clocksource/timer-atmel-st.c ---- linux-4.1.26.orig/drivers/clocksource/timer-atmel-st.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/clocksource/timer-atmel-st.c 2016-06-19 15:30:58.627295036 +0200 -@@ -131,6 +131,7 @@ +diff --git a/drivers/clocksource/timer-atmel-st.c b/drivers/clocksource/timer-atmel-st.c +index 1692e17e096b..306e2051f112 100644 +--- a/drivers/clocksource/timer-atmel-st.c ++++ b/drivers/clocksource/timer-atmel-st.c +@@ -131,6 +131,7 @@ clkevt32k_mode(enum clock_event_mode mode, struct clock_event_device *dev) break; case CLOCK_EVT_MODE_SHUTDOWN: case CLOCK_EVT_MODE_UNUSED: @@ -5670,10 +6496,24 @@ diff -Nur linux-4.1.26.orig/drivers/clocksource/timer-atmel-st.c linux-4.1.26/dr case CLOCK_EVT_MODE_RESUME: irqmask = 0; break; -diff -Nur linux-4.1.26.orig/drivers/cpufreq/cpufreq.c linux-4.1.26/drivers/cpufreq/cpufreq.c ---- linux-4.1.26.orig/drivers/cpufreq/cpufreq.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/cpufreq/cpufreq.c 2016-06-19 15:30:58.627295036 +0200 -@@ -64,12 +64,6 @@ +diff --git a/drivers/cpufreq/Kconfig.x86 b/drivers/cpufreq/Kconfig.x86 +index c59bdcb83217..8f23161d80be 100644 +--- a/drivers/cpufreq/Kconfig.x86 ++++ b/drivers/cpufreq/Kconfig.x86 +@@ -123,7 +123,7 @@ config X86_POWERNOW_K7_ACPI + + config X86_POWERNOW_K8 + tristate "AMD Opteron/Athlon64 PowerNow!" +- depends on ACPI && ACPI_PROCESSOR && X86_ACPI_CPUFREQ ++ depends on ACPI && ACPI_PROCESSOR && X86_ACPI_CPUFREQ && !PREEMPT_RT_BASE + help + This adds the CPUFreq driver for K8/early Opteron/Athlon64 processors. + Support for K10 and newer processors is now in acpi-cpufreq. +diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c +index 8ae655c364f4..ce1d93e93d1a 100644 +--- a/drivers/cpufreq/cpufreq.c ++++ b/drivers/cpufreq/cpufreq.c +@@ -64,12 +64,6 @@ static inline bool has_target(void) return cpufreq_driver->target_index || cpufreq_driver->target; } @@ -5686,7 +6526,7 @@ diff -Nur linux-4.1.26.orig/drivers/cpufreq/cpufreq.c linux-4.1.26/drivers/cpufr /* internal prototypes */ static int __cpufreq_governor(struct cpufreq_policy *policy, unsigned int event); -@@ -215,9 +209,6 @@ +@@ -215,9 +209,6 @@ struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu) if (cpu >= nr_cpu_ids) return NULL; @@ -5696,7 +6536,7 @@ diff -Nur linux-4.1.26.orig/drivers/cpufreq/cpufreq.c linux-4.1.26/drivers/cpufr /* get the cpufreq driver */ read_lock_irqsave(&cpufreq_driver_lock, flags); -@@ -230,9 +221,6 @@ +@@ -230,9 +221,6 @@ struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu) read_unlock_irqrestore(&cpufreq_driver_lock, flags); @@ -5706,7 +6546,7 @@ diff -Nur linux-4.1.26.orig/drivers/cpufreq/cpufreq.c linux-4.1.26/drivers/cpufr return policy; } EXPORT_SYMBOL_GPL(cpufreq_cpu_get); -@@ -240,7 +228,6 @@ +@@ -240,7 +228,6 @@ EXPORT_SYMBOL_GPL(cpufreq_cpu_get); void cpufreq_cpu_put(struct cpufreq_policy *policy) { kobject_put(&policy->kobj); @@ -5714,7 +6554,7 @@ diff -Nur linux-4.1.26.orig/drivers/cpufreq/cpufreq.c linux-4.1.26/drivers/cpufr } EXPORT_SYMBOL_GPL(cpufreq_cpu_put); -@@ -765,9 +752,6 @@ +@@ -765,9 +752,6 @@ static ssize_t show(struct kobject *kobj, struct attribute *attr, char *buf) struct freq_attr *fattr = to_attr(attr); ssize_t ret; @@ -5724,7 +6564,7 @@ diff -Nur linux-4.1.26.orig/drivers/cpufreq/cpufreq.c linux-4.1.26/drivers/cpufr down_read(&policy->rwsem); if (fattr->show) -@@ -776,7 +760,6 @@ +@@ -776,7 +760,6 @@ static ssize_t show(struct kobject *kobj, struct attribute *attr, char *buf) ret = -EIO; up_read(&policy->rwsem); @@ -5732,7 +6572,7 @@ diff -Nur linux-4.1.26.orig/drivers/cpufreq/cpufreq.c linux-4.1.26/drivers/cpufr return ret; } -@@ -793,9 +776,6 @@ +@@ -793,9 +776,6 @@ static ssize_t store(struct kobject *kobj, struct attribute *attr, if (!cpu_online(policy->cpu)) goto unlock; @@ -5742,7 +6582,7 @@ diff -Nur linux-4.1.26.orig/drivers/cpufreq/cpufreq.c linux-4.1.26/drivers/cpufr down_write(&policy->rwsem); if (fattr->store) -@@ -804,8 +784,6 @@ +@@ -804,8 +784,6 @@ static ssize_t store(struct kobject *kobj, struct attribute *attr, ret = -EIO; up_write(&policy->rwsem); @@ -5751,7 +6591,7 @@ diff -Nur linux-4.1.26.orig/drivers/cpufreq/cpufreq.c linux-4.1.26/drivers/cpufr unlock: put_online_cpus(); -@@ -1117,16 +1095,12 @@ +@@ -1117,16 +1095,12 @@ static int __cpufreq_add_dev(struct device *dev, struct subsys_interface *sif) if (unlikely(policy)) return 0; @@ -5768,7 +6608,7 @@ diff -Nur linux-4.1.26.orig/drivers/cpufreq/cpufreq.c linux-4.1.26/drivers/cpufr return ret; } } -@@ -1269,8 +1243,6 @@ +@@ -1269,8 +1243,6 @@ static int __cpufreq_add_dev(struct device *dev, struct subsys_interface *sif) kobject_uevent(&policy->kobj, KOBJ_ADD); @@ -5777,7 +6617,7 @@ diff -Nur linux-4.1.26.orig/drivers/cpufreq/cpufreq.c linux-4.1.26/drivers/cpufr /* Callback for handling stuff after policy is ready */ if (cpufreq_driver->ready) cpufreq_driver->ready(policy); -@@ -1304,8 +1276,6 @@ +@@ -1304,8 +1276,6 @@ err_set_policy_cpu: cpufreq_policy_free(policy); nomem_out: @@ -5786,7 +6626,7 @@ diff -Nur linux-4.1.26.orig/drivers/cpufreq/cpufreq.c linux-4.1.26/drivers/cpufr return ret; } -@@ -2499,19 +2469,20 @@ +@@ -2499,19 +2469,20 @@ int cpufreq_unregister_driver(struct cpufreq_driver *driver) pr_debug("unregistering driver %s\n", driver->name); @@ -5809,21 +6649,23 @@ diff -Nur linux-4.1.26.orig/drivers/cpufreq/cpufreq.c linux-4.1.26/drivers/cpufr return 0; } -diff -Nur linux-4.1.26.orig/drivers/cpufreq/Kconfig.x86 linux-4.1.26/drivers/cpufreq/Kconfig.x86 ---- linux-4.1.26.orig/drivers/cpufreq/Kconfig.x86 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/cpufreq/Kconfig.x86 2016-06-19 15:30:58.627295036 +0200 -@@ -123,7 +123,7 @@ +diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig +index c88b01bbf9a3..0fd82b872f63 100644 +--- a/drivers/gpio/Kconfig ++++ b/drivers/gpio/Kconfig +@@ -309,7 +309,7 @@ config GPIO_OCTEON + family of SOCs. - config X86_POWERNOW_K8 - tristate "AMD Opteron/Athlon64 PowerNow!" -- depends on ACPI && ACPI_PROCESSOR && X86_ACPI_CPUFREQ -+ depends on ACPI && ACPI_PROCESSOR && X86_ACPI_CPUFREQ && !PREEMPT_RT_BASE - help - This adds the CPUFreq driver for K8/early Opteron/Athlon64 processors. - Support for K10 and newer processors is now in acpi-cpufreq. -diff -Nur linux-4.1.26.orig/drivers/gpio/gpio-omap.c linux-4.1.26/drivers/gpio/gpio-omap.c ---- linux-4.1.26.orig/drivers/gpio/gpio-omap.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/gpio/gpio-omap.c 2016-06-19 15:30:58.631295190 +0200 + config GPIO_OMAP +- bool "TI OMAP GPIO support" if COMPILE_TEST && !ARCH_OMAP2PLUS ++ tristate "TI OMAP GPIO support" if ARCH_OMAP2PLUS || COMPILE_TEST + default y if ARCH_OMAP + depends on ARM + select GENERIC_IRQ_CHIP +diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c +index b232397ad7ec..4916fd726dce 100644 +--- a/drivers/gpio/gpio-omap.c ++++ b/drivers/gpio/gpio-omap.c @@ -29,6 +29,7 @@ #include <linux/platform_data/gpio-omap.h> @@ -5832,7 +6674,7 @@ diff -Nur linux-4.1.26.orig/drivers/gpio/gpio-omap.c linux-4.1.26/drivers/gpio/g static LIST_HEAD(omap_gpio_list); -@@ -50,14 +51,15 @@ +@@ -50,14 +51,15 @@ struct gpio_regs { struct gpio_bank { struct list_head node; void __iomem *base; @@ -5850,7 +6692,7 @@ diff -Nur linux-4.1.26.orig/drivers/gpio/gpio-omap.c linux-4.1.26/drivers/gpio/g struct gpio_chip chip; struct clk *dbck; u32 mod_usage; -@@ -67,7 +69,7 @@ +@@ -67,7 +69,7 @@ struct gpio_bank { struct device *dev; bool is_mpuio; bool dbck_flag; @@ -5859,7 +6701,7 @@ diff -Nur linux-4.1.26.orig/drivers/gpio/gpio-omap.c linux-4.1.26/drivers/gpio/g bool context_valid; int stride; u32 width; -@@ -175,7 +177,7 @@ +@@ -175,7 +177,7 @@ static inline void omap_gpio_rmw(void __iomem *base, u32 reg, u32 mask, bool set static inline void omap_gpio_dbck_enable(struct gpio_bank *bank) { if (bank->dbck_enable_mask && !bank->dbck_enabled) { @@ -5868,7 +6710,7 @@ diff -Nur linux-4.1.26.orig/drivers/gpio/gpio-omap.c linux-4.1.26/drivers/gpio/g bank->dbck_enabled = true; writel_relaxed(bank->dbck_enable_mask, -@@ -193,7 +195,7 @@ +@@ -193,7 +195,7 @@ static inline void omap_gpio_dbck_disable(struct gpio_bank *bank) */ writel_relaxed(0, bank->base + bank->regs->debounce_en); @@ -5877,7 +6719,7 @@ diff -Nur linux-4.1.26.orig/drivers/gpio/gpio-omap.c linux-4.1.26/drivers/gpio/g bank->dbck_enabled = false; } } -@@ -204,8 +206,9 @@ +@@ -204,8 +206,9 @@ static inline void omap_gpio_dbck_disable(struct gpio_bank *bank) * @offset: the gpio number on this @bank * @debounce: debounce time to use * @@ -5889,7 +6731,7 @@ diff -Nur linux-4.1.26.orig/drivers/gpio/gpio-omap.c linux-4.1.26/drivers/gpio/g */ static void omap2_set_gpio_debounce(struct gpio_bank *bank, unsigned offset, unsigned debounce) -@@ -213,34 +216,33 @@ +@@ -213,34 +216,33 @@ static void omap2_set_gpio_debounce(struct gpio_bank *bank, unsigned offset, void __iomem *reg; u32 val; u32 l; @@ -5932,7 +6774,7 @@ diff -Nur linux-4.1.26.orig/drivers/gpio/gpio-omap.c linux-4.1.26/drivers/gpio/g /* * Enable debounce clock per module. * This call is mandatory because in omap_gpio_request() when -@@ -285,7 +287,7 @@ +@@ -285,7 +287,7 @@ static void omap_clear_gpio_debounce(struct gpio_bank *bank, unsigned offset) bank->context.debounce = 0; writel_relaxed(bank->context.debounce, bank->base + bank->regs->debounce); @@ -5941,7 +6783,7 @@ diff -Nur linux-4.1.26.orig/drivers/gpio/gpio-omap.c linux-4.1.26/drivers/gpio/g bank->dbck_enabled = false; } } -@@ -488,9 +490,6 @@ +@@ -488,9 +490,6 @@ static int omap_gpio_irq_type(struct irq_data *d, unsigned type) unsigned long flags; unsigned offset = d->hwirq; @@ -5951,7 +6793,7 @@ diff -Nur linux-4.1.26.orig/drivers/gpio/gpio-omap.c linux-4.1.26/drivers/gpio/g if (type & ~IRQ_TYPE_SENSE_MASK) return -EINVAL; -@@ -498,20 +497,28 @@ +@@ -498,20 +497,28 @@ static int omap_gpio_irq_type(struct irq_data *d, unsigned type) (type & (IRQ_TYPE_LEVEL_LOW|IRQ_TYPE_LEVEL_HIGH))) return -EINVAL; @@ -5984,7 +6826,7 @@ diff -Nur linux-4.1.26.orig/drivers/gpio/gpio-omap.c linux-4.1.26/drivers/gpio/g return retval; } -@@ -626,34 +633,30 @@ +@@ -626,34 +633,30 @@ static int omap_set_gpio_wakeup(struct gpio_bank *bank, unsigned offset, return -EINVAL; } @@ -6027,7 +6869,7 @@ diff -Nur linux-4.1.26.orig/drivers/gpio/gpio-omap.c linux-4.1.26/drivers/gpio/g } static int omap_gpio_request(struct gpio_chip *chip, unsigned offset) -@@ -668,17 +671,10 @@ +@@ -668,17 +671,10 @@ static int omap_gpio_request(struct gpio_chip *chip, unsigned offset) if (!BANK_USED(bank)) pm_runtime_get_sync(bank->dev); @@ -6048,7 +6890,7 @@ diff -Nur linux-4.1.26.orig/drivers/gpio/gpio-omap.c linux-4.1.26/drivers/gpio/g return 0; } -@@ -688,11 +684,14 @@ +@@ -688,11 +684,14 @@ static void omap_gpio_free(struct gpio_chip *chip, unsigned offset) struct gpio_bank *bank = container_of(chip, struct gpio_bank, chip); unsigned long flags; @@ -6066,7 +6908,7 @@ diff -Nur linux-4.1.26.orig/drivers/gpio/gpio-omap.c linux-4.1.26/drivers/gpio/g /* * If this is the last gpio to be freed in the bank, -@@ -711,29 +710,27 @@ +@@ -711,29 +710,27 @@ static void omap_gpio_free(struct gpio_chip *chip, unsigned offset) * line's interrupt handler has been run, we may miss some nested * interrupts. */ @@ -6104,7 +6946,7 @@ diff -Nur linux-4.1.26.orig/drivers/gpio/gpio-omap.c linux-4.1.26/drivers/gpio/g enabled = omap_get_gpio_irqbank_mask(bank); isr_saved = isr = readl_relaxed(isr_reg) & enabled; -@@ -747,12 +744,7 @@ +@@ -747,12 +744,7 @@ static void omap_gpio_irq_handler(unsigned int irq, struct irq_desc *desc) omap_clear_gpio_irqbank(bank, isr_saved & ~level_mask); omap_enable_gpio_irqbank(bank, isr_saved & ~level_mask); @@ -6118,7 +6960,7 @@ diff -Nur linux-4.1.26.orig/drivers/gpio/gpio-omap.c linux-4.1.26/drivers/gpio/g if (!isr) break; -@@ -761,6 +753,7 @@ +@@ -761,6 +753,7 @@ static void omap_gpio_irq_handler(unsigned int irq, struct irq_desc *desc) bit = __ffs(isr); isr &= ~(BIT(bit)); @@ -6126,7 +6968,7 @@ diff -Nur linux-4.1.26.orig/drivers/gpio/gpio-omap.c linux-4.1.26/drivers/gpio/g /* * Some chips can't respond to both rising and falling * at the same time. If this irq was requested with -@@ -771,18 +764,20 @@ +@@ -771,18 +764,20 @@ static void omap_gpio_irq_handler(unsigned int irq, struct irq_desc *desc) if (bank->toggle_mask & (BIT(bit))) omap_toggle_gpio_edge_triggering(bank, bit); @@ -6153,7 +6995,7 @@ diff -Nur linux-4.1.26.orig/drivers/gpio/gpio-omap.c linux-4.1.26/drivers/gpio/g } static unsigned int omap_gpio_irq_startup(struct irq_data *d) -@@ -791,15 +786,22 @@ +@@ -791,15 +786,22 @@ static unsigned int omap_gpio_irq_startup(struct irq_data *d) unsigned long flags; unsigned offset = d->hwirq; @@ -6181,7 +7023,7 @@ diff -Nur linux-4.1.26.orig/drivers/gpio/gpio-omap.c linux-4.1.26/drivers/gpio/g } static void omap_gpio_irq_shutdown(struct irq_data *d) -@@ -808,11 +810,28 @@ +@@ -808,11 +810,28 @@ static void omap_gpio_irq_shutdown(struct irq_data *d) unsigned long flags; unsigned offset = d->hwirq; @@ -6213,7 +7055,7 @@ diff -Nur linux-4.1.26.orig/drivers/gpio/gpio-omap.c linux-4.1.26/drivers/gpio/g /* * If this is the last IRQ to be freed in the bank, -@@ -836,10 +855,10 @@ +@@ -836,10 +855,10 @@ static void omap_gpio_mask_irq(struct irq_data *d) unsigned offset = d->hwirq; unsigned long flags; @@ -6226,7 +7068,7 @@ diff -Nur linux-4.1.26.orig/drivers/gpio/gpio-omap.c linux-4.1.26/drivers/gpio/g } static void omap_gpio_unmask_irq(struct irq_data *d) -@@ -849,7 +868,7 @@ +@@ -849,7 +868,7 @@ static void omap_gpio_unmask_irq(struct irq_data *d) u32 trigger = irqd_get_trigger_type(d); unsigned long flags; @@ -6235,7 +7077,7 @@ diff -Nur linux-4.1.26.orig/drivers/gpio/gpio-omap.c linux-4.1.26/drivers/gpio/g if (trigger) omap_set_gpio_triggering(bank, offset, trigger); -@@ -861,7 +880,7 @@ +@@ -861,7 +880,7 @@ static void omap_gpio_unmask_irq(struct irq_data *d) } omap_set_gpio_irqenable(bank, offset, 1); @@ -6244,7 +7086,7 @@ diff -Nur linux-4.1.26.orig/drivers/gpio/gpio-omap.c linux-4.1.26/drivers/gpio/g } /*---------------------------------------------------------------------*/ -@@ -874,9 +893,9 @@ +@@ -874,9 +893,9 @@ static int omap_mpuio_suspend_noirq(struct device *dev) OMAP_MPUIO_GPIO_MASKIT / bank->stride; unsigned long flags; @@ -6256,7 +7098,7 @@ diff -Nur linux-4.1.26.orig/drivers/gpio/gpio-omap.c linux-4.1.26/drivers/gpio/g return 0; } -@@ -889,9 +908,9 @@ +@@ -889,9 +908,9 @@ static int omap_mpuio_resume_noirq(struct device *dev) OMAP_MPUIO_GPIO_MASKIT / bank->stride; unsigned long flags; @@ -6268,7 +7110,7 @@ diff -Nur linux-4.1.26.orig/drivers/gpio/gpio-omap.c linux-4.1.26/drivers/gpio/g return 0; } -@@ -937,9 +956,9 @@ +@@ -937,9 +956,9 @@ static int omap_gpio_get_direction(struct gpio_chip *chip, unsigned offset) bank = container_of(chip, struct gpio_bank, chip); reg = bank->base + bank->regs->direction; @@ -6280,7 +7122,7 @@ diff -Nur linux-4.1.26.orig/drivers/gpio/gpio-omap.c linux-4.1.26/drivers/gpio/g return dir; } -@@ -949,9 +968,9 @@ +@@ -949,9 +968,9 @@ static int omap_gpio_input(struct gpio_chip *chip, unsigned offset) unsigned long flags; bank = container_of(chip, struct gpio_bank, chip); @@ -6292,7 +7134,7 @@ diff -Nur linux-4.1.26.orig/drivers/gpio/gpio-omap.c linux-4.1.26/drivers/gpio/g return 0; } -@@ -973,10 +992,10 @@ +@@ -973,10 +992,10 @@ static int omap_gpio_output(struct gpio_chip *chip, unsigned offset, int value) unsigned long flags; bank = container_of(chip, struct gpio_bank, chip); @@ -6305,7 +7147,7 @@ diff -Nur linux-4.1.26.orig/drivers/gpio/gpio-omap.c linux-4.1.26/drivers/gpio/g return 0; } -@@ -988,9 +1007,9 @@ +@@ -988,9 +1007,9 @@ static int omap_gpio_debounce(struct gpio_chip *chip, unsigned offset, bank = container_of(chip, struct gpio_bank, chip); @@ -6317,7 +7159,7 @@ diff -Nur linux-4.1.26.orig/drivers/gpio/gpio-omap.c linux-4.1.26/drivers/gpio/g return 0; } -@@ -1001,9 +1020,9 @@ +@@ -1001,9 +1020,9 @@ static void omap_gpio_set(struct gpio_chip *chip, unsigned offset, int value) unsigned long flags; bank = container_of(chip, struct gpio_bank, chip); @@ -6329,7 +7171,7 @@ diff -Nur linux-4.1.26.orig/drivers/gpio/gpio-omap.c linux-4.1.26/drivers/gpio/g } /*---------------------------------------------------------------------*/ -@@ -1048,10 +1067,6 @@ +@@ -1048,10 +1067,6 @@ static void omap_gpio_mod_init(struct gpio_bank *bank) /* Initialize interface clk ungated, module enabled */ if (bank->regs->ctrl) writel_relaxed(0, base + bank->regs->ctrl); @@ -6340,7 +7182,7 @@ diff -Nur linux-4.1.26.orig/drivers/gpio/gpio-omap.c linux-4.1.26/drivers/gpio/g } static int omap_gpio_chip_init(struct gpio_bank *bank, struct irq_chip *irqc) -@@ -1080,7 +1095,6 @@ +@@ -1080,7 +1095,6 @@ static int omap_gpio_chip_init(struct gpio_bank *bank, struct irq_chip *irqc) } else { bank->chip.label = "gpio"; bank->chip.base = gpio; @@ -6348,7 +7190,7 @@ diff -Nur linux-4.1.26.orig/drivers/gpio/gpio-omap.c linux-4.1.26/drivers/gpio/g } bank->chip.ngpio = bank->width; -@@ -1090,6 +1104,9 @@ +@@ -1090,6 +1104,9 @@ static int omap_gpio_chip_init(struct gpio_bank *bank, struct irq_chip *irqc) return ret; } @@ -6358,7 +7200,7 @@ diff -Nur linux-4.1.26.orig/drivers/gpio/gpio-omap.c linux-4.1.26/drivers/gpio/g #ifdef CONFIG_ARCH_OMAP1 /* * REVISIT: Once we have OMAP1 supporting SPARSE_IRQ, we can drop -@@ -1112,7 +1129,7 @@ +@@ -1112,7 +1129,7 @@ static int omap_gpio_chip_init(struct gpio_bank *bank, struct irq_chip *irqc) } ret = gpiochip_irqchip_add(&bank->chip, irqc, @@ -6367,7 +7209,7 @@ diff -Nur linux-4.1.26.orig/drivers/gpio/gpio-omap.c linux-4.1.26/drivers/gpio/g IRQ_TYPE_NONE); if (ret) { -@@ -1121,10 +1138,14 @@ +@@ -1121,10 +1138,14 @@ static int omap_gpio_chip_init(struct gpio_bank *bank, struct irq_chip *irqc) return -ENODEV; } @@ -6385,7 +7227,7 @@ diff -Nur linux-4.1.26.orig/drivers/gpio/gpio-omap.c linux-4.1.26/drivers/gpio/g } static const struct of_device_id omap_gpio_match[]; -@@ -1163,17 +1184,23 @@ +@@ -1163,17 +1184,23 @@ static int omap_gpio_probe(struct platform_device *pdev) irqc->irq_unmask = omap_gpio_unmask_irq, irqc->irq_set_type = omap_gpio_irq_type, irqc->irq_set_wake = omap_gpio_wake_enable, @@ -6414,7 +7256,7 @@ diff -Nur linux-4.1.26.orig/drivers/gpio/gpio-omap.c linux-4.1.26/drivers/gpio/g bank->dbck_flag = pdata->dbck_flag; bank->stride = pdata->bank_stride; bank->width = pdata->bank_width; -@@ -1183,15 +1210,9 @@ +@@ -1183,15 +1210,9 @@ static int omap_gpio_probe(struct platform_device *pdev) #ifdef CONFIG_OF_GPIO bank->chip.of_node = of_node_get(node); #endif @@ -6433,7 +7275,7 @@ diff -Nur linux-4.1.26.orig/drivers/gpio/gpio-omap.c linux-4.1.26/drivers/gpio/g } if (bank->regs->set_dataout && bank->regs->clr_dataout) -@@ -1199,16 +1220,27 @@ +@@ -1199,16 +1220,27 @@ static int omap_gpio_probe(struct platform_device *pdev) else bank->set_dataout = omap_set_gpio_dataout_mask; @@ -6463,7 +7305,7 @@ diff -Nur linux-4.1.26.orig/drivers/gpio/gpio-omap.c linux-4.1.26/drivers/gpio/g platform_set_drvdata(pdev, bank); pm_runtime_enable(bank->dev); -@@ -1221,8 +1253,11 @@ +@@ -1221,8 +1253,11 @@ static int omap_gpio_probe(struct platform_device *pdev) omap_gpio_mod_init(bank); ret = omap_gpio_chip_init(bank, irqc); @@ -6476,7 +7318,7 @@ diff -Nur linux-4.1.26.orig/drivers/gpio/gpio-omap.c linux-4.1.26/drivers/gpio/g omap_gpio_show_rev(bank); -@@ -1233,6 +1268,19 @@ +@@ -1233,6 +1268,19 @@ static int omap_gpio_probe(struct platform_device *pdev) return 0; } @@ -6496,7 +7338,7 @@ diff -Nur linux-4.1.26.orig/drivers/gpio/gpio-omap.c linux-4.1.26/drivers/gpio/g #ifdef CONFIG_ARCH_OMAP2PLUS #if defined(CONFIG_PM) -@@ -1246,7 +1294,7 @@ +@@ -1246,7 +1294,7 @@ static int omap_gpio_runtime_suspend(struct device *dev) unsigned long flags; u32 wake_low, wake_hi; @@ -6505,7 +7347,7 @@ diff -Nur linux-4.1.26.orig/drivers/gpio/gpio-omap.c linux-4.1.26/drivers/gpio/g /* * Only edges can generate a wakeup event to the PRCM. -@@ -1299,7 +1347,7 @@ +@@ -1299,7 +1347,7 @@ update_gpio_context_count: bank->get_context_loss_count(bank->dev); omap_gpio_dbck_disable(bank); @@ -6514,7 +7356,7 @@ diff -Nur linux-4.1.26.orig/drivers/gpio/gpio-omap.c linux-4.1.26/drivers/gpio/g return 0; } -@@ -1314,14 +1362,14 @@ +@@ -1314,14 +1362,14 @@ static int omap_gpio_runtime_resume(struct device *dev) unsigned long flags; int c; @@ -6531,7 +7373,7 @@ diff -Nur linux-4.1.26.orig/drivers/gpio/gpio-omap.c linux-4.1.26/drivers/gpio/g omap_gpio_init_context(bank); if (bank->get_context_loss_count) -@@ -1342,22 +1390,20 @@ +@@ -1342,22 +1390,20 @@ static int omap_gpio_runtime_resume(struct device *dev) writel_relaxed(bank->context.risingdetect, bank->base + bank->regs->risingdetect); @@ -6562,7 +7404,7 @@ diff -Nur linux-4.1.26.orig/drivers/gpio/gpio-omap.c linux-4.1.26/drivers/gpio/g return 0; } -@@ -1412,18 +1458,19 @@ +@@ -1412,18 +1458,19 @@ static int omap_gpio_runtime_resume(struct device *dev) } bank->workaround_enabled = false; @@ -6584,7 +7426,7 @@ diff -Nur linux-4.1.26.orig/drivers/gpio/gpio-omap.c linux-4.1.26/drivers/gpio/g continue; bank->power_mode = pwr_mode; -@@ -1437,12 +1484,13 @@ +@@ -1437,12 +1484,13 @@ void omap2_gpio_resume_after_idle(void) struct gpio_bank *bank; list_for_each_entry(bank, &omap_gpio_list, node) { @@ -6599,7 +7441,7 @@ diff -Nur linux-4.1.26.orig/drivers/gpio/gpio-omap.c linux-4.1.26/drivers/gpio/g #if defined(CONFIG_PM) static void omap_gpio_init_context(struct gpio_bank *p) -@@ -1598,6 +1646,7 @@ +@@ -1598,6 +1646,7 @@ MODULE_DEVICE_TABLE(of, omap_gpio_match); static struct platform_driver omap_gpio_driver = { .probe = omap_gpio_probe, @@ -6607,7 +7449,7 @@ diff -Nur linux-4.1.26.orig/drivers/gpio/gpio-omap.c linux-4.1.26/drivers/gpio/g .driver = { .name = "omap_gpio", .pm = &gpio_pm_ops, -@@ -1615,3 +1664,13 @@ +@@ -1615,3 +1664,13 @@ static int __init omap_gpio_drv_reg(void) return platform_driver_register(&omap_gpio_driver); } postcore_initcall(omap_gpio_drv_reg); @@ -6621,21 +7463,10 @@ diff -Nur linux-4.1.26.orig/drivers/gpio/gpio-omap.c linux-4.1.26/drivers/gpio/g +MODULE_DESCRIPTION("omap gpio driver"); +MODULE_ALIAS("platform:gpio-omap"); +MODULE_LICENSE("GPL v2"); -diff -Nur linux-4.1.26.orig/drivers/gpio/Kconfig linux-4.1.26/drivers/gpio/Kconfig ---- linux-4.1.26.orig/drivers/gpio/Kconfig 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/gpio/Kconfig 2016-06-19 15:30:58.631295190 +0200 -@@ -308,7 +308,7 @@ - family of SOCs. - - config GPIO_OMAP -- bool "TI OMAP GPIO support" if COMPILE_TEST && !ARCH_OMAP2PLUS -+ tristate "TI OMAP GPIO support" if ARCH_OMAP2PLUS || COMPILE_TEST - default y if ARCH_OMAP - depends on ARM - select GENERIC_IRQ_CHIP -diff -Nur linux-4.1.26.orig/drivers/gpu/drm/i915/i915_gem_execbuffer.c linux-4.1.26/drivers/gpu/drm/i915/i915_gem_execbuffer.c ---- linux-4.1.26.orig/drivers/gpu/drm/i915/i915_gem_execbuffer.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/gpu/drm/i915/i915_gem_execbuffer.c 2016-06-19 15:30:58.631295190 +0200 +diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/i915_gem_execbuffer.c +index 479024a4caad..a67a351e88ab 100644 +--- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c ++++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c @@ -32,6 +32,7 @@ #include "i915_trace.h" #include "intel_drv.h" @@ -6644,7 +7475,7 @@ diff -Nur linux-4.1.26.orig/drivers/gpu/drm/i915/i915_gem_execbuffer.c linux-4.1 #define __EXEC_OBJECT_HAS_PIN (1<<31) #define __EXEC_OBJECT_HAS_FENCE (1<<30) -@@ -465,7 +466,7 @@ +@@ -465,7 +466,7 @@ i915_gem_execbuffer_relocate_entry(struct drm_i915_gem_object *obj, } /* We can't wait for rendering with pagefaults disabled */ @@ -6653,7 +7484,7 @@ diff -Nur linux-4.1.26.orig/drivers/gpu/drm/i915/i915_gem_execbuffer.c linux-4.1 return -EFAULT; if (use_cpu_reloc(obj)) -@@ -1338,7 +1339,9 @@ +@@ -1338,7 +1339,9 @@ i915_gem_ringbuffer_submission(struct drm_device *dev, struct drm_file *file, return ret; } @@ -6663,22 +7494,24 @@ diff -Nur linux-4.1.26.orig/drivers/gpu/drm/i915/i915_gem_execbuffer.c linux-4.1 i915_gem_execbuffer_move_to_active(vmas, ring); i915_gem_execbuffer_retire_commands(dev, file, ring, batch_obj); -diff -Nur linux-4.1.26.orig/drivers/gpu/drm/i915/i915_gem_shrinker.c linux-4.1.26/drivers/gpu/drm/i915/i915_gem_shrinker.c ---- linux-4.1.26.orig/drivers/gpu/drm/i915/i915_gem_shrinker.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/gpu/drm/i915/i915_gem_shrinker.c 2016-06-19 15:30:58.631295190 +0200 -@@ -39,7 +39,7 @@ +diff --git a/drivers/gpu/drm/i915/i915_gem_shrinker.c b/drivers/gpu/drm/i915/i915_gem_shrinker.c +index 7ab9cc456dd2..e06515f4eb7c 100644 +--- a/drivers/gpu/drm/i915/i915_gem_shrinker.c ++++ b/drivers/gpu/drm/i915/i915_gem_shrinker.c +@@ -39,7 +39,7 @@ static bool mutex_is_locked_by(struct mutex *mutex, struct task_struct *task) if (!mutex_is_locked(mutex)) return false; --#if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_MUTEXES) -+#if (defined(CONFIG_SMP) || defined(CONFIG_DEBUG_MUTEXES)) && !defined(CONFIG_PREEMPT_RT_BASE) +-#if defined(CONFIG_DEBUG_MUTEXES) || defined(CONFIG_MUTEX_SPIN_ON_OWNER) ++#if (defined(CONFIG_DEBUG_MUTEXES) || defined(CONFIG_MUTEX_SPIN_ON_OWNER)) && !defined(CONFIG_PREEMPT_RT_BASE) return mutex->owner == task; #else /* Since UP may be pre-empted, we cannot assume that we own the lock */ -diff -Nur linux-4.1.26.orig/drivers/gpu/drm/i915/i915_irq.c linux-4.1.26/drivers/gpu/drm/i915/i915_irq.c ---- linux-4.1.26.orig/drivers/gpu/drm/i915/i915_irq.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/gpu/drm/i915/i915_irq.c 2016-06-19 15:30:58.631295190 +0200 -@@ -676,6 +676,7 @@ +diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c +index b0df8d10482a..8d34df020842 100644 +--- a/drivers/gpu/drm/i915/i915_irq.c ++++ b/drivers/gpu/drm/i915/i915_irq.c +@@ -676,6 +676,7 @@ static int i915_get_crtc_scanoutpos(struct drm_device *dev, int pipe, spin_lock_irqsave(&dev_priv->uncore.lock, irqflags); /* preempt_disable_rt() should go right here in PREEMPT_RT patchset. */ @@ -6686,7 +7519,7 @@ diff -Nur linux-4.1.26.orig/drivers/gpu/drm/i915/i915_irq.c linux-4.1.26/drivers /* Get optional system timestamp before query. */ if (stime) -@@ -727,6 +728,7 @@ +@@ -727,6 +728,7 @@ static int i915_get_crtc_scanoutpos(struct drm_device *dev, int pipe, *etime = ktime_get(); /* preempt_enable_rt() should go right here in PREEMPT_RT patchset. */ @@ -6694,10 +7527,11 @@ diff -Nur linux-4.1.26.orig/drivers/gpu/drm/i915/i915_irq.c linux-4.1.26/drivers spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags); -diff -Nur linux-4.1.26.orig/drivers/gpu/drm/i915/intel_display.c linux-4.1.26/drivers/gpu/drm/i915/intel_display.c ---- linux-4.1.26.orig/drivers/gpu/drm/i915/intel_display.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/gpu/drm/i915/intel_display.c 2016-06-19 15:30:58.635295344 +0200 -@@ -10084,7 +10084,7 @@ +diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c +index 56323732c748..d1f1781392bf 100644 +--- a/drivers/gpu/drm/i915/intel_display.c ++++ b/drivers/gpu/drm/i915/intel_display.c +@@ -10084,7 +10084,7 @@ void intel_check_page_flip(struct drm_device *dev, int pipe) struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe]; struct intel_crtc *intel_crtc = to_intel_crtc(crtc); @@ -6706,9 +7540,10 @@ diff -Nur linux-4.1.26.orig/drivers/gpu/drm/i915/intel_display.c linux-4.1.26/dr if (crtc == NULL) return; -diff -Nur linux-4.1.26.orig/drivers/gpu/drm/i915/intel_sprite.c linux-4.1.26/drivers/gpu/drm/i915/intel_sprite.c ---- linux-4.1.26.orig/drivers/gpu/drm/i915/intel_sprite.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/gpu/drm/i915/intel_sprite.c 2016-06-19 15:30:58.635295344 +0200 +diff --git a/drivers/gpu/drm/i915/intel_sprite.c b/drivers/gpu/drm/i915/intel_sprite.c +index a4c0a04b5044..6da459fe20b2 100644 +--- a/drivers/gpu/drm/i915/intel_sprite.c ++++ b/drivers/gpu/drm/i915/intel_sprite.c @@ -37,6 +37,7 @@ #include "intel_drv.h" #include <drm/i915_drm.h> @@ -6717,7 +7552,7 @@ diff -Nur linux-4.1.26.orig/drivers/gpu/drm/i915/intel_sprite.c linux-4.1.26/dri static bool format_is_yuv(uint32_t format) -@@ -61,6 +62,8 @@ +@@ -61,6 +62,8 @@ static int usecs_to_scanlines(const struct drm_display_mode *mode, int usecs) return DIV_ROUND_UP(usecs * mode->crtc_clock, 1000 * mode->crtc_htotal); } @@ -6726,7 +7561,7 @@ diff -Nur linux-4.1.26.orig/drivers/gpu/drm/i915/intel_sprite.c linux-4.1.26/dri /** * intel_pipe_update_start() - start update of a set of display registers * @crtc: the crtc of which the registers are going to be updated -@@ -101,7 +104,7 @@ +@@ -101,7 +104,7 @@ bool intel_pipe_update_start(struct intel_crtc *crtc, uint32_t *start_vbl_count) if (WARN_ON(drm_crtc_vblank_get(&crtc->base))) return false; @@ -6735,7 +7570,7 @@ diff -Nur linux-4.1.26.orig/drivers/gpu/drm/i915/intel_sprite.c linux-4.1.26/dri trace_i915_pipe_update_start(crtc, min, max); -@@ -123,11 +126,11 @@ +@@ -123,11 +126,11 @@ bool intel_pipe_update_start(struct intel_crtc *crtc, uint32_t *start_vbl_count) break; } @@ -6749,7 +7584,7 @@ diff -Nur linux-4.1.26.orig/drivers/gpu/drm/i915/intel_sprite.c linux-4.1.26/dri } finish_wait(wq, &wait); -@@ -158,7 +161,7 @@ +@@ -158,7 +161,7 @@ void intel_pipe_update_end(struct intel_crtc *crtc, u32 start_vbl_count) trace_i915_pipe_update_end(crtc, end_vbl_count); @@ -6758,10 +7593,11 @@ diff -Nur linux-4.1.26.orig/drivers/gpu/drm/i915/intel_sprite.c linux-4.1.26/dri if (start_vbl_count != end_vbl_count) DRM_ERROR("Atomic update failure on pipe %c (start=%u end=%u)\n", -diff -Nur linux-4.1.26.orig/drivers/gpu/drm/radeon/radeon_display.c linux-4.1.26/drivers/gpu/drm/radeon/radeon_display.c ---- linux-4.1.26.orig/drivers/gpu/drm/radeon/radeon_display.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/gpu/drm/radeon/radeon_display.c 2016-06-19 15:30:58.635295344 +0200 -@@ -1798,6 +1798,7 @@ +diff --git a/drivers/gpu/drm/radeon/radeon_display.c b/drivers/gpu/drm/radeon/radeon_display.c +index 6743174acdbc..8ad198bbc24d 100644 +--- a/drivers/gpu/drm/radeon/radeon_display.c ++++ b/drivers/gpu/drm/radeon/radeon_display.c +@@ -1798,6 +1798,7 @@ int radeon_get_crtc_scanoutpos(struct drm_device *dev, int crtc, unsigned int fl struct radeon_device *rdev = dev->dev_private; /* preempt_disable_rt() should go right here in PREEMPT_RT patchset. */ @@ -6769,7 +7605,7 @@ diff -Nur linux-4.1.26.orig/drivers/gpu/drm/radeon/radeon_display.c linux-4.1.26 /* Get optional system timestamp before query. */ if (stime) -@@ -1890,6 +1891,7 @@ +@@ -1890,6 +1891,7 @@ int radeon_get_crtc_scanoutpos(struct drm_device *dev, int crtc, unsigned int fl *etime = ktime_get(); /* preempt_enable_rt() should go right here in PREEMPT_RT patchset. */ @@ -6777,10 +7613,11 @@ diff -Nur linux-4.1.26.orig/drivers/gpu/drm/radeon/radeon_display.c linux-4.1.26 /* Decode into vertical and horizontal scanout position. */ *vpos = position & 0x1fff; -diff -Nur linux-4.1.26.orig/drivers/i2c/busses/i2c-omap.c linux-4.1.26/drivers/i2c/busses/i2c-omap.c ---- linux-4.1.26.orig/drivers/i2c/busses/i2c-omap.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/i2c/busses/i2c-omap.c 2016-06-19 15:30:58.635295344 +0200 -@@ -996,15 +996,12 @@ +diff --git a/drivers/i2c/busses/i2c-omap.c b/drivers/i2c/busses/i2c-omap.c +index 0e894193accf..2f9de5ecb6ed 100644 +--- a/drivers/i2c/busses/i2c-omap.c ++++ b/drivers/i2c/busses/i2c-omap.c +@@ -996,15 +996,12 @@ omap_i2c_isr(int irq, void *dev_id) u16 mask; u16 stat; @@ -6797,10 +7634,11 @@ diff -Nur linux-4.1.26.orig/drivers/i2c/busses/i2c-omap.c linux-4.1.26/drivers/i return ret; } -diff -Nur linux-4.1.26.orig/drivers/ide/alim15x3.c linux-4.1.26/drivers/ide/alim15x3.c ---- linux-4.1.26.orig/drivers/ide/alim15x3.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/ide/alim15x3.c 2016-06-19 15:30:58.635295344 +0200 -@@ -234,7 +234,7 @@ +diff --git a/drivers/ide/alim15x3.c b/drivers/ide/alim15x3.c +index 36f76e28a0bf..394f142f90c7 100644 +--- a/drivers/ide/alim15x3.c ++++ b/drivers/ide/alim15x3.c +@@ -234,7 +234,7 @@ static int init_chipset_ali15x3(struct pci_dev *dev) isa_dev = pci_get_device(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533, NULL); @@ -6809,7 +7647,7 @@ diff -Nur linux-4.1.26.orig/drivers/ide/alim15x3.c linux-4.1.26/drivers/ide/alim if (m5229_revision < 0xC2) { /* -@@ -325,7 +325,7 @@ +@@ -325,7 +325,7 @@ out: } pci_dev_put(north); pci_dev_put(isa_dev); @@ -6818,10 +7656,11 @@ diff -Nur linux-4.1.26.orig/drivers/ide/alim15x3.c linux-4.1.26/drivers/ide/alim return 0; } -diff -Nur linux-4.1.26.orig/drivers/ide/hpt366.c linux-4.1.26/drivers/ide/hpt366.c ---- linux-4.1.26.orig/drivers/ide/hpt366.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/ide/hpt366.c 2016-06-19 15:30:58.635295344 +0200 -@@ -1241,7 +1241,7 @@ +diff --git a/drivers/ide/hpt366.c b/drivers/ide/hpt366.c +index 696b6c1ec940..0d0a96629b73 100644 +--- a/drivers/ide/hpt366.c ++++ b/drivers/ide/hpt366.c +@@ -1241,7 +1241,7 @@ static int init_dma_hpt366(ide_hwif_t *hwif, dma_old = inb(base + 2); @@ -6830,7 +7669,7 @@ diff -Nur linux-4.1.26.orig/drivers/ide/hpt366.c linux-4.1.26/drivers/ide/hpt366 dma_new = dma_old; pci_read_config_byte(dev, hwif->channel ? 0x4b : 0x43, &masterdma); -@@ -1252,7 +1252,7 @@ +@@ -1252,7 +1252,7 @@ static int init_dma_hpt366(ide_hwif_t *hwif, if (dma_new != dma_old) outb(dma_new, base + 2); @@ -6839,40 +7678,11 @@ diff -Nur linux-4.1.26.orig/drivers/ide/hpt366.c linux-4.1.26/drivers/ide/hpt366 printk(KERN_INFO " %s: BM-DMA at 0x%04lx-0x%04lx\n", hwif->name, base, base + 7); -diff -Nur linux-4.1.26.orig/drivers/ide/ide-io.c linux-4.1.26/drivers/ide/ide-io.c ---- linux-4.1.26.orig/drivers/ide/ide-io.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/ide/ide-io.c 2016-06-19 15:30:58.635295344 +0200 -@@ -659,7 +659,7 @@ - /* disable_irq_nosync ?? */ - disable_irq(hwif->irq); - /* local CPU only, as if we were handling an interrupt */ -- local_irq_disable(); -+ local_irq_disable_nort(); - if (hwif->polling) { - startstop = handler(drive); - } else if (drive_is_ready(drive)) { -diff -Nur linux-4.1.26.orig/drivers/ide/ide-iops.c linux-4.1.26/drivers/ide/ide-iops.c ---- linux-4.1.26.orig/drivers/ide/ide-iops.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/ide/ide-iops.c 2016-06-19 15:30:58.635295344 +0200 -@@ -129,12 +129,12 @@ - if ((stat & ATA_BUSY) == 0) - break; - -- local_irq_restore(flags); -+ local_irq_restore_nort(flags); - *rstat = stat; - return -EBUSY; - } - } -- local_irq_restore(flags); -+ local_irq_restore_nort(flags); - } - /* - * Allow status to settle, then read it again. -diff -Nur linux-4.1.26.orig/drivers/ide/ide-io-std.c linux-4.1.26/drivers/ide/ide-io-std.c ---- linux-4.1.26.orig/drivers/ide/ide-io-std.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/ide/ide-io-std.c 2016-06-19 15:30:58.635295344 +0200 -@@ -175,7 +175,7 @@ +diff --git a/drivers/ide/ide-io-std.c b/drivers/ide/ide-io-std.c +index 19763977568c..4169433faab5 100644 +--- a/drivers/ide/ide-io-std.c ++++ b/drivers/ide/ide-io-std.c +@@ -175,7 +175,7 @@ void ide_input_data(ide_drive_t *drive, struct ide_cmd *cmd, void *buf, unsigned long uninitialized_var(flags); if ((io_32bit & 2) && !mmio) { @@ -6881,7 +7691,7 @@ diff -Nur linux-4.1.26.orig/drivers/ide/ide-io-std.c linux-4.1.26/drivers/ide/id ata_vlb_sync(io_ports->nsect_addr); } -@@ -186,7 +186,7 @@ +@@ -186,7 +186,7 @@ void ide_input_data(ide_drive_t *drive, struct ide_cmd *cmd, void *buf, insl(data_addr, buf, words); if ((io_32bit & 2) && !mmio) @@ -6890,7 +7700,7 @@ diff -Nur linux-4.1.26.orig/drivers/ide/ide-io-std.c linux-4.1.26/drivers/ide/id if (((len + 1) & 3) < 2) return; -@@ -219,7 +219,7 @@ +@@ -219,7 +219,7 @@ void ide_output_data(ide_drive_t *drive, struct ide_cmd *cmd, void *buf, unsigned long uninitialized_var(flags); if ((io_32bit & 2) && !mmio) { @@ -6899,7 +7709,7 @@ diff -Nur linux-4.1.26.orig/drivers/ide/ide-io-std.c linux-4.1.26/drivers/ide/id ata_vlb_sync(io_ports->nsect_addr); } -@@ -230,7 +230,7 @@ +@@ -230,7 +230,7 @@ void ide_output_data(ide_drive_t *drive, struct ide_cmd *cmd, void *buf, outsl(data_addr, buf, words); if ((io_32bit & 2) && !mmio) @@ -6908,10 +7718,43 @@ diff -Nur linux-4.1.26.orig/drivers/ide/ide-io-std.c linux-4.1.26/drivers/ide/id if (((len + 1) & 3) < 2) return; -diff -Nur linux-4.1.26.orig/drivers/ide/ide-probe.c linux-4.1.26/drivers/ide/ide-probe.c ---- linux-4.1.26.orig/drivers/ide/ide-probe.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/ide/ide-probe.c 2016-06-19 15:30:58.635295344 +0200 -@@ -196,10 +196,10 @@ +diff --git a/drivers/ide/ide-io.c b/drivers/ide/ide-io.c +index 177db6d5b2f5..079ae6bebf18 100644 +--- a/drivers/ide/ide-io.c ++++ b/drivers/ide/ide-io.c +@@ -659,7 +659,7 @@ void ide_timer_expiry (unsigned long data) + /* disable_irq_nosync ?? */ + disable_irq(hwif->irq); + /* local CPU only, as if we were handling an interrupt */ +- local_irq_disable(); ++ local_irq_disable_nort(); + if (hwif->polling) { + startstop = handler(drive); + } else if (drive_is_ready(drive)) { +diff --git a/drivers/ide/ide-iops.c b/drivers/ide/ide-iops.c +index 376f2dc410c5..f014dd1b73dc 100644 +--- a/drivers/ide/ide-iops.c ++++ b/drivers/ide/ide-iops.c +@@ -129,12 +129,12 @@ int __ide_wait_stat(ide_drive_t *drive, u8 good, u8 bad, + if ((stat & ATA_BUSY) == 0) + break; + +- local_irq_restore(flags); ++ local_irq_restore_nort(flags); + *rstat = stat; + return -EBUSY; + } + } +- local_irq_restore(flags); ++ local_irq_restore_nort(flags); + } + /* + * Allow status to settle, then read it again. +diff --git a/drivers/ide/ide-probe.c b/drivers/ide/ide-probe.c +index 0b63facd1d87..4ceba37afc0c 100644 +--- a/drivers/ide/ide-probe.c ++++ b/drivers/ide/ide-probe.c +@@ -196,10 +196,10 @@ static void do_identify(ide_drive_t *drive, u8 cmd, u16 *id) int bswap = 1; /* local CPU only; some systems need this */ @@ -6924,10 +7767,11 @@ diff -Nur linux-4.1.26.orig/drivers/ide/ide-probe.c linux-4.1.26/drivers/ide/ide drive->dev_flags |= IDE_DFLAG_ID_READ; #ifdef DEBUG -diff -Nur linux-4.1.26.orig/drivers/ide/ide-taskfile.c linux-4.1.26/drivers/ide/ide-taskfile.c ---- linux-4.1.26.orig/drivers/ide/ide-taskfile.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/ide/ide-taskfile.c 2016-06-19 15:30:58.635295344 +0200 -@@ -250,7 +250,7 @@ +diff --git a/drivers/ide/ide-taskfile.c b/drivers/ide/ide-taskfile.c +index dabb88b1cbec..2cecea72520a 100644 +--- a/drivers/ide/ide-taskfile.c ++++ b/drivers/ide/ide-taskfile.c +@@ -250,7 +250,7 @@ void ide_pio_bytes(ide_drive_t *drive, struct ide_cmd *cmd, page_is_high = PageHighMem(page); if (page_is_high) @@ -6936,7 +7780,7 @@ diff -Nur linux-4.1.26.orig/drivers/ide/ide-taskfile.c linux-4.1.26/drivers/ide/ buf = kmap_atomic(page) + offset; -@@ -271,7 +271,7 @@ +@@ -271,7 +271,7 @@ void ide_pio_bytes(ide_drive_t *drive, struct ide_cmd *cmd, kunmap_atomic(buf); if (page_is_high) @@ -6945,7 +7789,7 @@ diff -Nur linux-4.1.26.orig/drivers/ide/ide-taskfile.c linux-4.1.26/drivers/ide/ len -= nr_bytes; } -@@ -414,7 +414,7 @@ +@@ -414,7 +414,7 @@ static ide_startstop_t pre_task_out_intr(ide_drive_t *drive, } if ((drive->dev_flags & IDE_DFLAG_UNMASK) == 0) @@ -6954,10 +7798,11 @@ diff -Nur linux-4.1.26.orig/drivers/ide/ide-taskfile.c linux-4.1.26/drivers/ide/ ide_set_handler(drive, &task_pio_intr, WAIT_WORSTCASE); -diff -Nur linux-4.1.26.orig/drivers/infiniband/ulp/ipoib/ipoib_multicast.c linux-4.1.26/drivers/infiniband/ulp/ipoib/ipoib_multicast.c ---- linux-4.1.26.orig/drivers/infiniband/ulp/ipoib/ipoib_multicast.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/infiniband/ulp/ipoib/ipoib_multicast.c 2016-06-19 15:30:58.639295498 +0200 -@@ -821,7 +821,7 @@ +diff --git a/drivers/infiniband/ulp/ipoib/ipoib_multicast.c b/drivers/infiniband/ulp/ipoib/ipoib_multicast.c +index 0d23e0568deb..140c94ce71c5 100644 +--- a/drivers/infiniband/ulp/ipoib/ipoib_multicast.c ++++ b/drivers/infiniband/ulp/ipoib/ipoib_multicast.c +@@ -821,7 +821,7 @@ void ipoib_mcast_restart_task(struct work_struct *work) ipoib_dbg_mcast(priv, "restarting multicast task\n"); @@ -6966,7 +7811,7 @@ diff -Nur linux-4.1.26.orig/drivers/infiniband/ulp/ipoib/ipoib_multicast.c linux netif_addr_lock(dev); spin_lock(&priv->lock); -@@ -903,7 +903,7 @@ +@@ -903,7 +903,7 @@ void ipoib_mcast_restart_task(struct work_struct *work) spin_unlock(&priv->lock); netif_addr_unlock(dev); @@ -6975,10 +7820,11 @@ diff -Nur linux-4.1.26.orig/drivers/infiniband/ulp/ipoib/ipoib_multicast.c linux /* * make sure the in-flight joins have finished before we attempt -diff -Nur linux-4.1.26.orig/drivers/input/gameport/gameport.c linux-4.1.26/drivers/input/gameport/gameport.c ---- linux-4.1.26.orig/drivers/input/gameport/gameport.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/input/gameport/gameport.c 2016-06-19 15:30:58.639295498 +0200 -@@ -124,12 +124,12 @@ +diff --git a/drivers/input/gameport/gameport.c b/drivers/input/gameport/gameport.c +index e853a2134680..5b6aa39a1de7 100644 +--- a/drivers/input/gameport/gameport.c ++++ b/drivers/input/gameport/gameport.c +@@ -124,12 +124,12 @@ static int old_gameport_measure_speed(struct gameport *gameport) tx = 1 << 30; for(i = 0; i < 50; i++) { @@ -6993,7 +7839,7 @@ diff -Nur linux-4.1.26.orig/drivers/input/gameport/gameport.c linux-4.1.26/drive udelay(i * 10); if ((t = DELTA(t2,t1) - DELTA(t3,t2)) < tx) tx = t; } -@@ -148,11 +148,11 @@ +@@ -148,11 +148,11 @@ static int old_gameport_measure_speed(struct gameport *gameport) tx = 1 << 30; for(i = 0; i < 50; i++) { @@ -7007,10 +7853,11 @@ diff -Nur linux-4.1.26.orig/drivers/input/gameport/gameport.c linux-4.1.26/drive udelay(i * 10); if (t2 - t1 < tx) tx = t2 - t1; } -diff -Nur linux-4.1.26.orig/drivers/leds/trigger/Kconfig linux-4.1.26/drivers/leds/trigger/Kconfig ---- linux-4.1.26.orig/drivers/leds/trigger/Kconfig 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/leds/trigger/Kconfig 2016-06-19 15:30:58.639295498 +0200 -@@ -61,7 +61,7 @@ +diff --git a/drivers/leds/trigger/Kconfig b/drivers/leds/trigger/Kconfig +index 49794b47b51c..3d7245d6b2f8 100644 +--- a/drivers/leds/trigger/Kconfig ++++ b/drivers/leds/trigger/Kconfig +@@ -61,7 +61,7 @@ config LEDS_TRIGGER_BACKLIGHT config LEDS_TRIGGER_CPU bool "LED CPU Trigger" @@ -7019,9 +7866,10 @@ diff -Nur linux-4.1.26.orig/drivers/leds/trigger/Kconfig linux-4.1.26/drivers/le help This allows LEDs to be controlled by active CPUs. This shows the active CPUs across an array of LEDs so you can see which -diff -Nur linux-4.1.26.orig/drivers/md/bcache/Kconfig linux-4.1.26/drivers/md/bcache/Kconfig ---- linux-4.1.26.orig/drivers/md/bcache/Kconfig 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/md/bcache/Kconfig 2016-06-19 15:30:58.639295498 +0200 +diff --git a/drivers/md/bcache/Kconfig b/drivers/md/bcache/Kconfig +index 4d200883c505..98b64ed5cb81 100644 +--- a/drivers/md/bcache/Kconfig ++++ b/drivers/md/bcache/Kconfig @@ -1,6 +1,7 @@ config BCACHE @@ -7030,10 +7878,11 @@ diff -Nur linux-4.1.26.orig/drivers/md/bcache/Kconfig linux-4.1.26/drivers/md/bc ---help--- Allows a block device to be used as cache for other devices; uses a btree for indexing and the layout is optimized for SSDs. -diff -Nur linux-4.1.26.orig/drivers/md/dm.c linux-4.1.26/drivers/md/dm.c ---- linux-4.1.26.orig/drivers/md/dm.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/md/dm.c 2016-06-19 15:30:58.639295498 +0200 -@@ -2133,7 +2133,7 @@ +diff --git a/drivers/md/dm.c b/drivers/md/dm.c +index 87de9a0848b7..86f64c13ccf6 100644 +--- a/drivers/md/dm.c ++++ b/drivers/md/dm.c +@@ -2141,7 +2141,7 @@ static void dm_request_fn(struct request_queue *q) /* Establish tio->ti before queuing work (map_tio_request) */ tio->ti = ti; queue_kthread_work(&md->kworker, &tio->work); @@ -7042,10 +7891,11 @@ diff -Nur linux-4.1.26.orig/drivers/md/dm.c linux-4.1.26/drivers/md/dm.c } goto out; -diff -Nur linux-4.1.26.orig/drivers/md/raid5.c linux-4.1.26/drivers/md/raid5.c ---- linux-4.1.26.orig/drivers/md/raid5.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/md/raid5.c 2016-06-19 15:30:58.639295498 +0200 -@@ -1918,8 +1918,9 @@ +diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c +index ef0a99a3a779..4e60997ef19a 100644 +--- a/drivers/md/raid5.c ++++ b/drivers/md/raid5.c +@@ -1918,8 +1918,9 @@ static void raid_run_ops(struct stripe_head *sh, unsigned long ops_request) struct raid5_percpu *percpu; unsigned long cpu; @@ -7056,7 +7906,7 @@ diff -Nur linux-4.1.26.orig/drivers/md/raid5.c linux-4.1.26/drivers/md/raid5.c if (test_bit(STRIPE_OP_BIOFILL, &ops_request)) { ops_run_biofill(sh); overlap_clear++; -@@ -1975,7 +1976,8 @@ +@@ -1975,7 +1976,8 @@ static void raid_run_ops(struct stripe_head *sh, unsigned long ops_request) if (test_and_clear_bit(R5_Overlap, &dev->flags)) wake_up(&sh->raid_conf->wait_for_overlap); } @@ -7066,7 +7916,7 @@ diff -Nur linux-4.1.26.orig/drivers/md/raid5.c linux-4.1.26/drivers/md/raid5.c } static struct stripe_head *alloc_stripe(struct kmem_cache *sc, gfp_t gfp) -@@ -6375,6 +6377,7 @@ +@@ -6375,6 +6377,7 @@ static int raid5_alloc_percpu(struct r5conf *conf) __func__, cpu); break; } @@ -7074,10 +7924,11 @@ diff -Nur linux-4.1.26.orig/drivers/md/raid5.c linux-4.1.26/drivers/md/raid5.c } put_online_cpus(); -diff -Nur linux-4.1.26.orig/drivers/md/raid5.h linux-4.1.26/drivers/md/raid5.h ---- linux-4.1.26.orig/drivers/md/raid5.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/md/raid5.h 2016-06-19 15:30:58.639295498 +0200 -@@ -495,6 +495,7 @@ +diff --git a/drivers/md/raid5.h b/drivers/md/raid5.h +index d31ed93bb8a9..82fc623bf0b0 100644 +--- a/drivers/md/raid5.h ++++ b/drivers/md/raid5.h +@@ -495,6 +495,7 @@ struct r5conf { int recovery_disabled; /* per cpu variables */ struct raid5_percpu { @@ -7085,9 +7936,97 @@ diff -Nur linux-4.1.26.orig/drivers/md/raid5.h linux-4.1.26/drivers/md/raid5.h struct page *spare_page; /* Used when checking P/Q in raid6 */ struct flex_array *scribble; /* space for constructing buffer * lists and performing address -diff -Nur linux-4.1.26.orig/drivers/misc/hwlat_detector.c linux-4.1.26/drivers/misc/hwlat_detector.c ---- linux-4.1.26.orig/drivers/misc/hwlat_detector.c 1970-01-01 01:00:00.000000000 +0100 -+++ linux-4.1.26/drivers/misc/hwlat_detector.c 2016-06-19 15:30:58.643295653 +0200 +diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig +index b3c10b7dae1f..b9d7f076f2f8 100644 +--- a/drivers/misc/Kconfig ++++ b/drivers/misc/Kconfig +@@ -54,6 +54,7 @@ config AD525X_DPOT_SPI + config ATMEL_TCLIB + bool "Atmel AT32/AT91 Timer/Counter Library" + depends on (AVR32 || ARCH_AT91) ++ default y if PREEMPT_RT_FULL + help + Select this if you want a library to allocate the Timer/Counter + blocks found on many Atmel processors. This facilitates using +@@ -69,8 +70,7 @@ config ATMEL_TCB_CLKSRC + are combined to make a single 32-bit timer. + + When GENERIC_CLOCKEVENTS is defined, the third timer channel +- may be used as a clock event device supporting oneshot mode +- (delays of up to two seconds) based on the 32 KiHz clock. ++ may be used as a clock event device supporting oneshot mode. + + config ATMEL_TCB_CLKSRC_BLOCK + int +@@ -84,6 +84,15 @@ config ATMEL_TCB_CLKSRC_BLOCK + TC can be used for other purposes, such as PWM generation and + interval timing. + ++config ATMEL_TCB_CLKSRC_USE_SLOW_CLOCK ++ bool "TC Block use 32 KiHz clock" ++ depends on ATMEL_TCB_CLKSRC ++ default y if !PREEMPT_RT_FULL ++ help ++ Select this to use 32 KiHz base clock rate as TC block clock ++ source for clock events. ++ ++ + config DUMMY_IRQ + tristate "Dummy IRQ handler" + default n +@@ -113,6 +122,35 @@ config IBM_ASM + for information on the specific driver level and support statement + for your IBM server. + ++config HWLAT_DETECTOR ++ tristate "Testing module to detect hardware-induced latencies" ++ depends on DEBUG_FS ++ depends on RING_BUFFER ++ default m ++ ---help--- ++ A simple hardware latency detector. Use this module to detect ++ large latencies introduced by the behavior of the underlying ++ system firmware external to Linux. We do this using periodic ++ use of stop_machine to grab all available CPUs and measure ++ for unexplainable gaps in the CPU timestamp counter(s). By ++ default, the module is not enabled until the "enable" file ++ within the "hwlat_detector" debugfs directory is toggled. ++ ++ This module is often used to detect SMI (System Management ++ Interrupts) on x86 systems, though is not x86 specific. To ++ this end, we default to using a sample window of 1 second, ++ during which we will sample for 0.5 seconds. If an SMI or ++ similar event occurs during that time, it is recorded ++ into an 8K samples global ring buffer until retreived. ++ ++ WARNING: This software should never be enabled (it can be built ++ but should not be turned on after it is loaded) in a production ++ environment where high latencies are a concern since the ++ sampling mechanism actually introduces latencies for ++ regular tasks while the CPU(s) are being held. ++ ++ If unsure, say N ++ + config PHANTOM + tristate "Sensable PHANToM (PCI)" + depends on PCI +diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile +index 7d5c4cd118c4..6a8e39388cf9 100644 +--- a/drivers/misc/Makefile ++++ b/drivers/misc/Makefile +@@ -38,6 +38,7 @@ obj-$(CONFIG_C2PORT) += c2port/ + obj-$(CONFIG_HMC6352) += hmc6352.o + obj-y += eeprom/ + obj-y += cb710/ ++obj-$(CONFIG_HWLAT_DETECTOR) += hwlat_detector.o + obj-$(CONFIG_SPEAR13XX_PCIE_GADGET) += spear13xx_pcie_gadget.o + obj-$(CONFIG_VMWARE_BALLOON) += vmw_balloon.o + obj-$(CONFIG_ARM_CHARLCD) += arm-charlcd.o +diff --git a/drivers/misc/hwlat_detector.c b/drivers/misc/hwlat_detector.c +new file mode 100644 +index 000000000000..2429c4331e68 +--- /dev/null ++++ b/drivers/misc/hwlat_detector.c @@ -0,0 +1,1240 @@ +/* + * hwlat_detector.c - A simple Hardware Latency detector. @@ -8329,94 +9268,11 @@ diff -Nur linux-4.1.26.orig/drivers/misc/hwlat_detector.c linux-4.1.26/drivers/m + +module_init(detector_init); +module_exit(detector_exit); -diff -Nur linux-4.1.26.orig/drivers/misc/Kconfig linux-4.1.26/drivers/misc/Kconfig ---- linux-4.1.26.orig/drivers/misc/Kconfig 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/misc/Kconfig 2016-06-19 15:30:58.639295498 +0200 -@@ -54,6 +54,7 @@ - config ATMEL_TCLIB - bool "Atmel AT32/AT91 Timer/Counter Library" - depends on (AVR32 || ARCH_AT91) -+ default y if PREEMPT_RT_FULL - help - Select this if you want a library to allocate the Timer/Counter - blocks found on many Atmel processors. This facilitates using -@@ -69,8 +70,7 @@ - are combined to make a single 32-bit timer. - - When GENERIC_CLOCKEVENTS is defined, the third timer channel -- may be used as a clock event device supporting oneshot mode -- (delays of up to two seconds) based on the 32 KiHz clock. -+ may be used as a clock event device supporting oneshot mode. - - config ATMEL_TCB_CLKSRC_BLOCK - int -@@ -84,6 +84,15 @@ - TC can be used for other purposes, such as PWM generation and - interval timing. - -+config ATMEL_TCB_CLKSRC_USE_SLOW_CLOCK -+ bool "TC Block use 32 KiHz clock" -+ depends on ATMEL_TCB_CLKSRC -+ default y if !PREEMPT_RT_FULL -+ help -+ Select this to use 32 KiHz base clock rate as TC block clock -+ source for clock events. -+ -+ - config DUMMY_IRQ - tristate "Dummy IRQ handler" - default n -@@ -113,6 +122,35 @@ - for information on the specific driver level and support statement - for your IBM server. - -+config HWLAT_DETECTOR -+ tristate "Testing module to detect hardware-induced latencies" -+ depends on DEBUG_FS -+ depends on RING_BUFFER -+ default m -+ ---help--- -+ A simple hardware latency detector. Use this module to detect -+ large latencies introduced by the behavior of the underlying -+ system firmware external to Linux. We do this using periodic -+ use of stop_machine to grab all available CPUs and measure -+ for unexplainable gaps in the CPU timestamp counter(s). By -+ default, the module is not enabled until the "enable" file -+ within the "hwlat_detector" debugfs directory is toggled. -+ -+ This module is often used to detect SMI (System Management -+ Interrupts) on x86 systems, though is not x86 specific. To -+ this end, we default to using a sample window of 1 second, -+ during which we will sample for 0.5 seconds. If an SMI or -+ similar event occurs during that time, it is recorded -+ into an 8K samples global ring buffer until retreived. -+ -+ WARNING: This software should never be enabled (it can be built -+ but should not be turned on after it is loaded) in a production -+ environment where high latencies are a concern since the -+ sampling mechanism actually introduces latencies for -+ regular tasks while the CPU(s) are being held. -+ -+ If unsure, say N -+ - config PHANTOM - tristate "Sensable PHANToM (PCI)" - depends on PCI -diff -Nur linux-4.1.26.orig/drivers/misc/Makefile linux-4.1.26/drivers/misc/Makefile ---- linux-4.1.26.orig/drivers/misc/Makefile 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/misc/Makefile 2016-06-19 15:30:58.639295498 +0200 -@@ -38,6 +38,7 @@ - obj-$(CONFIG_HMC6352) += hmc6352.o - obj-y += eeprom/ - obj-y += cb710/ -+obj-$(CONFIG_HWLAT_DETECTOR) += hwlat_detector.o - obj-$(CONFIG_SPEAR13XX_PCIE_GADGET) += spear13xx_pcie_gadget.o - obj-$(CONFIG_VMWARE_BALLOON) += vmw_balloon.o - obj-$(CONFIG_ARM_CHARLCD) += arm-charlcd.o -diff -Nur linux-4.1.26.orig/drivers/mmc/host/mmci.c linux-4.1.26/drivers/mmc/host/mmci.c ---- linux-4.1.26.orig/drivers/mmc/host/mmci.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/mmc/host/mmci.c 2016-06-19 15:30:58.643295653 +0200 -@@ -1155,15 +1155,12 @@ +diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c +index acece3299756..58ea04a03fa9 100644 +--- a/drivers/mmc/host/mmci.c ++++ b/drivers/mmc/host/mmci.c +@@ -1155,15 +1155,12 @@ static irqreturn_t mmci_pio_irq(int irq, void *dev_id) struct sg_mapping_iter *sg_miter = &host->sg_miter; struct variant_data *variant = host->variant; void __iomem *base = host->base; @@ -8432,7 +9288,7 @@ diff -Nur linux-4.1.26.orig/drivers/mmc/host/mmci.c linux-4.1.26/drivers/mmc/hos do { unsigned int remain, len; char *buffer; -@@ -1203,8 +1200,6 @@ +@@ -1203,8 +1200,6 @@ static irqreturn_t mmci_pio_irq(int irq, void *dev_id) sg_miter_stop(sg_miter); @@ -8441,10 +9297,11 @@ diff -Nur linux-4.1.26.orig/drivers/mmc/host/mmci.c linux-4.1.26/drivers/mmc/hos /* * If we have less than the fifo 'half-full' threshold to transfer, * trigger a PIO interrupt as soon as any data is available. -diff -Nur linux-4.1.26.orig/drivers/net/ethernet/3com/3c59x.c linux-4.1.26/drivers/net/ethernet/3com/3c59x.c ---- linux-4.1.26.orig/drivers/net/ethernet/3com/3c59x.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/net/ethernet/3com/3c59x.c 2016-06-19 15:30:58.643295653 +0200 -@@ -842,9 +842,9 @@ +diff --git a/drivers/net/ethernet/3com/3c59x.c b/drivers/net/ethernet/3com/3c59x.c +index 41095ebad97f..b0a0cb22aec4 100644 +--- a/drivers/net/ethernet/3com/3c59x.c ++++ b/drivers/net/ethernet/3com/3c59x.c +@@ -842,9 +842,9 @@ static void poll_vortex(struct net_device *dev) { struct vortex_private *vp = netdev_priv(dev); unsigned long flags; @@ -8456,7 +9313,7 @@ diff -Nur linux-4.1.26.orig/drivers/net/ethernet/3com/3c59x.c linux-4.1.26/drive } #endif -@@ -1916,12 +1916,12 @@ +@@ -1916,12 +1916,12 @@ static void vortex_tx_timeout(struct net_device *dev) * Block interrupts because vortex_interrupt does a bare spin_lock() */ unsigned long flags; @@ -8471,10 +9328,11 @@ diff -Nur linux-4.1.26.orig/drivers/net/ethernet/3com/3c59x.c linux-4.1.26/drive } } -diff -Nur linux-4.1.26.orig/drivers/net/ethernet/atheros/atl1c/atl1c_main.c linux-4.1.26/drivers/net/ethernet/atheros/atl1c/atl1c_main.c ---- linux-4.1.26.orig/drivers/net/ethernet/atheros/atl1c/atl1c_main.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/net/ethernet/atheros/atl1c/atl1c_main.c 2016-06-19 15:30:58.643295653 +0200 -@@ -2212,11 +2212,7 @@ +diff --git a/drivers/net/ethernet/atheros/atl1c/atl1c_main.c b/drivers/net/ethernet/atheros/atl1c/atl1c_main.c +index 6e9036a06515..cc956b06ad18 100644 +--- a/drivers/net/ethernet/atheros/atl1c/atl1c_main.c ++++ b/drivers/net/ethernet/atheros/atl1c/atl1c_main.c +@@ -2212,11 +2212,7 @@ static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb, } tpd_req = atl1c_cal_tpd_req(skb); @@ -8487,10 +9345,11 @@ diff -Nur linux-4.1.26.orig/drivers/net/ethernet/atheros/atl1c/atl1c_main.c linu if (atl1c_tpd_avail(adapter, type) < tpd_req) { /* no enough descriptor, just stop queue */ -diff -Nur linux-4.1.26.orig/drivers/net/ethernet/atheros/atl1e/atl1e_main.c linux-4.1.26/drivers/net/ethernet/atheros/atl1e/atl1e_main.c ---- linux-4.1.26.orig/drivers/net/ethernet/atheros/atl1e/atl1e_main.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/net/ethernet/atheros/atl1e/atl1e_main.c 2016-06-19 15:30:58.643295653 +0200 -@@ -1880,8 +1880,7 @@ +diff --git a/drivers/net/ethernet/atheros/atl1e/atl1e_main.c b/drivers/net/ethernet/atheros/atl1e/atl1e_main.c +index 59a03a193e83..734f7a7ad2c3 100644 +--- a/drivers/net/ethernet/atheros/atl1e/atl1e_main.c ++++ b/drivers/net/ethernet/atheros/atl1e/atl1e_main.c +@@ -1880,8 +1880,7 @@ static netdev_tx_t atl1e_xmit_frame(struct sk_buff *skb, return NETDEV_TX_OK; } tpd_req = atl1e_cal_tdp_req(skb); @@ -8500,10 +9359,11 @@ diff -Nur linux-4.1.26.orig/drivers/net/ethernet/atheros/atl1e/atl1e_main.c linu if (atl1e_tpd_avail(adapter) < tpd_req) { /* no enough descriptor, just stop queue */ -diff -Nur linux-4.1.26.orig/drivers/net/ethernet/chelsio/cxgb/sge.c linux-4.1.26/drivers/net/ethernet/chelsio/cxgb/sge.c ---- linux-4.1.26.orig/drivers/net/ethernet/chelsio/cxgb/sge.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/net/ethernet/chelsio/cxgb/sge.c 2016-06-19 15:30:58.643295653 +0200 -@@ -1664,8 +1664,7 @@ +diff --git a/drivers/net/ethernet/chelsio/cxgb/sge.c b/drivers/net/ethernet/chelsio/cxgb/sge.c +index 526ea74e82d9..86f467a2c485 100644 +--- a/drivers/net/ethernet/chelsio/cxgb/sge.c ++++ b/drivers/net/ethernet/chelsio/cxgb/sge.c +@@ -1664,8 +1664,7 @@ static int t1_sge_tx(struct sk_buff *skb, struct adapter *adapter, struct cmdQ *q = &sge->cmdQ[qid]; unsigned int credits, pidx, genbit, count, use_sched_skb = 0; @@ -8513,10 +9373,11 @@ diff -Nur linux-4.1.26.orig/drivers/net/ethernet/chelsio/cxgb/sge.c linux-4.1.26 reclaim_completed_tx(sge, q); -diff -Nur linux-4.1.26.orig/drivers/net/ethernet/freescale/gianfar.c linux-4.1.26/drivers/net/ethernet/freescale/gianfar.c ---- linux-4.1.26.orig/drivers/net/ethernet/freescale/gianfar.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/net/ethernet/freescale/gianfar.c 2016-06-19 15:30:58.643295653 +0200 -@@ -1540,7 +1540,7 @@ +diff --git a/drivers/net/ethernet/freescale/gianfar.c b/drivers/net/ethernet/freescale/gianfar.c +index 4ee080d49bc0..e616b71d5014 100644 +--- a/drivers/net/ethernet/freescale/gianfar.c ++++ b/drivers/net/ethernet/freescale/gianfar.c +@@ -1540,7 +1540,7 @@ static int gfar_suspend(struct device *dev) if (netif_running(ndev)) { @@ -8525,7 +9386,7 @@ diff -Nur linux-4.1.26.orig/drivers/net/ethernet/freescale/gianfar.c linux-4.1.2 lock_tx_qs(priv); gfar_halt_nodisable(priv); -@@ -1556,7 +1556,7 @@ +@@ -1556,7 +1556,7 @@ static int gfar_suspend(struct device *dev) gfar_write(®s->maccfg1, tempval); unlock_tx_qs(priv); @@ -8534,7 +9395,7 @@ diff -Nur linux-4.1.26.orig/drivers/net/ethernet/freescale/gianfar.c linux-4.1.2 disable_napi(priv); -@@ -1598,7 +1598,7 @@ +@@ -1598,7 +1598,7 @@ static int gfar_resume(struct device *dev) /* Disable Magic Packet mode, in case something * else woke us up. */ @@ -8543,7 +9404,7 @@ diff -Nur linux-4.1.26.orig/drivers/net/ethernet/freescale/gianfar.c linux-4.1.2 lock_tx_qs(priv); tempval = gfar_read(®s->maccfg2); -@@ -1608,7 +1608,7 @@ +@@ -1608,7 +1608,7 @@ static int gfar_resume(struct device *dev) gfar_start(priv); unlock_tx_qs(priv); @@ -8552,7 +9413,7 @@ diff -Nur linux-4.1.26.orig/drivers/net/ethernet/freescale/gianfar.c linux-4.1.2 netif_device_attach(ndev); -@@ -3418,14 +3418,14 @@ +@@ -3418,14 +3418,14 @@ static irqreturn_t gfar_error(int irq, void *grp_id) dev->stats.tx_dropped++; atomic64_inc(&priv->extra_stats.tx_underrun); @@ -8569,10 +9430,11 @@ diff -Nur linux-4.1.26.orig/drivers/net/ethernet/freescale/gianfar.c linux-4.1.2 } netif_dbg(priv, tx_err, dev, "Transmit Error\n"); } -diff -Nur linux-4.1.26.orig/drivers/net/ethernet/neterion/s2io.c linux-4.1.26/drivers/net/ethernet/neterion/s2io.c ---- linux-4.1.26.orig/drivers/net/ethernet/neterion/s2io.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/net/ethernet/neterion/s2io.c 2016-06-19 15:30:58.647295807 +0200 -@@ -4084,12 +4084,7 @@ +diff --git a/drivers/net/ethernet/neterion/s2io.c b/drivers/net/ethernet/neterion/s2io.c +index 1e0f72b65459..bb5ced2b5194 100644 +--- a/drivers/net/ethernet/neterion/s2io.c ++++ b/drivers/net/ethernet/neterion/s2io.c +@@ -4084,12 +4084,7 @@ static netdev_tx_t s2io_xmit(struct sk_buff *skb, struct net_device *dev) [skb->priority & (MAX_TX_FIFOS - 1)]; fifo = &mac_control->fifos[queue]; @@ -8586,10 +9448,11 @@ diff -Nur linux-4.1.26.orig/drivers/net/ethernet/neterion/s2io.c linux-4.1.26/dr if (sp->config.multiq) { if (__netif_subqueue_stopped(dev, fifo->fifo_no)) { -diff -Nur linux-4.1.26.orig/drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c linux-4.1.26/drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c ---- linux-4.1.26.orig/drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c 2016-06-19 15:30:58.647295807 +0200 -@@ -2137,10 +2137,8 @@ +diff --git a/drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c b/drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c +index 3b98b263bad0..ca4add749410 100644 +--- a/drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c ++++ b/drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c +@@ -2137,10 +2137,8 @@ static int pch_gbe_xmit_frame(struct sk_buff *skb, struct net_device *netdev) struct pch_gbe_tx_ring *tx_ring = adapter->tx_ring; unsigned long flags; @@ -8602,10 +9465,11 @@ diff -Nur linux-4.1.26.orig/drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c if (unlikely(!PCH_GBE_DESC_UNUSED(tx_ring))) { netif_stop_queue(netdev); spin_unlock_irqrestore(&tx_ring->tx_lock, flags); -diff -Nur linux-4.1.26.orig/drivers/net/ethernet/realtek/8139too.c linux-4.1.26/drivers/net/ethernet/realtek/8139too.c ---- linux-4.1.26.orig/drivers/net/ethernet/realtek/8139too.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/net/ethernet/realtek/8139too.c 2016-06-19 15:30:58.647295807 +0200 -@@ -2229,7 +2229,7 @@ +diff --git a/drivers/net/ethernet/realtek/8139too.c b/drivers/net/ethernet/realtek/8139too.c +index 78bb4ceb1cdd..b5156963ca07 100644 +--- a/drivers/net/ethernet/realtek/8139too.c ++++ b/drivers/net/ethernet/realtek/8139too.c +@@ -2229,7 +2229,7 @@ static void rtl8139_poll_controller(struct net_device *dev) struct rtl8139_private *tp = netdev_priv(dev); const int irq = tp->pci_dev->irq; @@ -8614,10 +9478,11 @@ diff -Nur linux-4.1.26.orig/drivers/net/ethernet/realtek/8139too.c linux-4.1.26/ rtl8139_interrupt(irq, dev); enable_irq(irq); } -diff -Nur linux-4.1.26.orig/drivers/net/ethernet/tehuti/tehuti.c linux-4.1.26/drivers/net/ethernet/tehuti/tehuti.c ---- linux-4.1.26.orig/drivers/net/ethernet/tehuti/tehuti.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/net/ethernet/tehuti/tehuti.c 2016-06-19 15:30:58.647295807 +0200 -@@ -1629,13 +1629,8 @@ +diff --git a/drivers/net/ethernet/tehuti/tehuti.c b/drivers/net/ethernet/tehuti/tehuti.c +index a9cac8413e49..bd70b848174d 100644 +--- a/drivers/net/ethernet/tehuti/tehuti.c ++++ b/drivers/net/ethernet/tehuti/tehuti.c +@@ -1629,13 +1629,8 @@ static netdev_tx_t bdx_tx_transmit(struct sk_buff *skb, unsigned long flags; ENTER; @@ -8633,10 +9498,11 @@ diff -Nur linux-4.1.26.orig/drivers/net/ethernet/tehuti/tehuti.c linux-4.1.26/dr /* build tx descriptor */ BDX_ASSERT(f->m.wptr >= f->m.memsz); /* started with valid wptr */ -diff -Nur linux-4.1.26.orig/drivers/net/rionet.c linux-4.1.26/drivers/net/rionet.c ---- linux-4.1.26.orig/drivers/net/rionet.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/net/rionet.c 2016-06-19 15:30:58.647295807 +0200 -@@ -174,11 +174,7 @@ +diff --git a/drivers/net/rionet.c b/drivers/net/rionet.c +index 18cc2c8d5447..a5e0ef3c02d1 100644 +--- a/drivers/net/rionet.c ++++ b/drivers/net/rionet.c +@@ -174,11 +174,7 @@ static int rionet_start_xmit(struct sk_buff *skb, struct net_device *ndev) unsigned long flags; int add_num = 1; @@ -8649,10 +9515,11 @@ diff -Nur linux-4.1.26.orig/drivers/net/rionet.c linux-4.1.26/drivers/net/rionet if (is_multicast_ether_addr(eth->h_dest)) add_num = nets[rnet->mport->id].nact; -diff -Nur linux-4.1.26.orig/drivers/net/wireless/orinoco/orinoco_usb.c linux-4.1.26/drivers/net/wireless/orinoco/orinoco_usb.c ---- linux-4.1.26.orig/drivers/net/wireless/orinoco/orinoco_usb.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/net/wireless/orinoco/orinoco_usb.c 2016-06-19 15:30:58.647295807 +0200 -@@ -697,7 +697,7 @@ +diff --git a/drivers/net/wireless/orinoco/orinoco_usb.c b/drivers/net/wireless/orinoco/orinoco_usb.c +index 91f05442de28..8fb1c92724df 100644 +--- a/drivers/net/wireless/orinoco/orinoco_usb.c ++++ b/drivers/net/wireless/orinoco/orinoco_usb.c +@@ -697,7 +697,7 @@ static void ezusb_req_ctx_wait(struct ezusb_priv *upriv, while (!ctx->done.done && msecs--) udelay(1000); } else { @@ -8661,10 +9528,11 @@ diff -Nur linux-4.1.26.orig/drivers/net/wireless/orinoco/orinoco_usb.c linux-4.1 ctx->done.done); } break; -diff -Nur linux-4.1.26.orig/drivers/pci/access.c linux-4.1.26/drivers/pci/access.c ---- linux-4.1.26.orig/drivers/pci/access.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/pci/access.c 2016-06-19 15:30:58.647295807 +0200 -@@ -561,7 +561,7 @@ +diff --git a/drivers/pci/access.c b/drivers/pci/access.c +index 502a82ca1db0..6bb46e0a3349 100644 +--- a/drivers/pci/access.c ++++ b/drivers/pci/access.c +@@ -561,7 +561,7 @@ void pci_cfg_access_unlock(struct pci_dev *dev) WARN_ON(!dev->block_cfg_access); dev->block_cfg_access = 0; @@ -8673,10 +9541,11 @@ diff -Nur linux-4.1.26.orig/drivers/pci/access.c linux-4.1.26/drivers/pci/access raw_spin_unlock_irqrestore(&pci_lock, flags); } EXPORT_SYMBOL_GPL(pci_cfg_access_unlock); -diff -Nur linux-4.1.26.orig/drivers/scsi/fcoe/fcoe.c linux-4.1.26/drivers/scsi/fcoe/fcoe.c ---- linux-4.1.26.orig/drivers/scsi/fcoe/fcoe.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/scsi/fcoe/fcoe.c 2016-06-19 15:30:58.647295807 +0200 -@@ -1287,7 +1287,7 @@ +diff --git a/drivers/scsi/fcoe/fcoe.c b/drivers/scsi/fcoe/fcoe.c +index ec193a8357d7..455bf9c67b16 100644 +--- a/drivers/scsi/fcoe/fcoe.c ++++ b/drivers/scsi/fcoe/fcoe.c +@@ -1287,7 +1287,7 @@ static void fcoe_percpu_thread_destroy(unsigned int cpu) struct sk_buff *skb; #ifdef CONFIG_SMP struct fcoe_percpu_s *p0; @@ -8685,7 +9554,7 @@ diff -Nur linux-4.1.26.orig/drivers/scsi/fcoe/fcoe.c linux-4.1.26/drivers/scsi/f #endif /* CONFIG_SMP */ FCOE_DBG("Destroying receive thread for CPU %d\n", cpu); -@@ -1343,7 +1343,7 @@ +@@ -1343,7 +1343,7 @@ static void fcoe_percpu_thread_destroy(unsigned int cpu) kfree_skb(skb); spin_unlock_bh(&p->fcoe_rx_list.lock); } @@ -8694,7 +9563,7 @@ diff -Nur linux-4.1.26.orig/drivers/scsi/fcoe/fcoe.c linux-4.1.26/drivers/scsi/f #else /* * This a non-SMP scenario where the singular Rx thread is -@@ -1567,11 +1567,11 @@ +@@ -1567,11 +1567,11 @@ err2: static int fcoe_alloc_paged_crc_eof(struct sk_buff *skb, int tlen) { struct fcoe_percpu_s *fps; @@ -8709,7 +9578,7 @@ diff -Nur linux-4.1.26.orig/drivers/scsi/fcoe/fcoe.c linux-4.1.26/drivers/scsi/f return rc; } -@@ -1767,11 +1767,11 @@ +@@ -1767,11 +1767,11 @@ static inline int fcoe_filter_frames(struct fc_lport *lport, return 0; } @@ -8723,7 +9592,16 @@ diff -Nur linux-4.1.26.orig/drivers/scsi/fcoe/fcoe.c linux-4.1.26/drivers/scsi/f return -EINVAL; } -@@ -1847,13 +1847,13 @@ +@@ -1815,7 +1815,7 @@ static void fcoe_recv_frame(struct sk_buff *skb) + */ + hp = (struct fcoe_hdr *) skb_network_header(skb); + +- stats = per_cpu_ptr(lport->stats, get_cpu()); ++ stats = per_cpu_ptr(lport->stats, get_cpu_light()); + if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) { + if (stats->ErrorFrames < 5) + printk(KERN_WARNING "fcoe: FCoE version " +@@ -1847,13 +1847,13 @@ static void fcoe_recv_frame(struct sk_buff *skb) goto drop; if (!fcoe_filter_frames(lport, fp)) { @@ -8739,10 +9617,11 @@ diff -Nur linux-4.1.26.orig/drivers/scsi/fcoe/fcoe.c linux-4.1.26/drivers/scsi/f kfree_skb(skb); } -diff -Nur linux-4.1.26.orig/drivers/scsi/fcoe/fcoe_ctlr.c linux-4.1.26/drivers/scsi/fcoe/fcoe_ctlr.c ---- linux-4.1.26.orig/drivers/scsi/fcoe/fcoe_ctlr.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/scsi/fcoe/fcoe_ctlr.c 2016-06-19 15:30:58.651295961 +0200 -@@ -831,7 +831,7 @@ +diff --git a/drivers/scsi/fcoe/fcoe_ctlr.c b/drivers/scsi/fcoe/fcoe_ctlr.c +index 34a1b1f333b4..d91131210695 100644 +--- a/drivers/scsi/fcoe/fcoe_ctlr.c ++++ b/drivers/scsi/fcoe/fcoe_ctlr.c +@@ -831,7 +831,7 @@ static unsigned long fcoe_ctlr_age_fcfs(struct fcoe_ctlr *fip) INIT_LIST_HEAD(&del_list); @@ -8751,7 +9630,7 @@ diff -Nur linux-4.1.26.orig/drivers/scsi/fcoe/fcoe_ctlr.c linux-4.1.26/drivers/s list_for_each_entry_safe(fcf, next, &fip->fcfs, list) { deadline = fcf->time + fcf->fka_period + fcf->fka_period / 2; -@@ -867,7 +867,7 @@ +@@ -867,7 +867,7 @@ static unsigned long fcoe_ctlr_age_fcfs(struct fcoe_ctlr *fip) sel_time = fcf->time; } } @@ -8760,10 +9639,11 @@ diff -Nur linux-4.1.26.orig/drivers/scsi/fcoe/fcoe_ctlr.c linux-4.1.26/drivers/s list_for_each_entry_safe(fcf, next, &del_list, list) { /* Removes fcf from current list */ -diff -Nur linux-4.1.26.orig/drivers/scsi/libfc/fc_exch.c linux-4.1.26/drivers/scsi/libfc/fc_exch.c ---- linux-4.1.26.orig/drivers/scsi/libfc/fc_exch.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/scsi/libfc/fc_exch.c 2016-06-19 15:30:58.651295961 +0200 -@@ -814,10 +814,10 @@ +diff --git a/drivers/scsi/libfc/fc_exch.c b/drivers/scsi/libfc/fc_exch.c +index 30f9ef0c0d4f..6c686bc01a82 100644 +--- a/drivers/scsi/libfc/fc_exch.c ++++ b/drivers/scsi/libfc/fc_exch.c +@@ -814,10 +814,10 @@ static struct fc_exch *fc_exch_em_alloc(struct fc_lport *lport, } memset(ep, 0, sizeof(*ep)); @@ -8776,10 +9656,11 @@ diff -Nur linux-4.1.26.orig/drivers/scsi/libfc/fc_exch.c linux-4.1.26/drivers/sc /* peek cache of free slot */ if (pool->left != FC_XID_UNKNOWN) { -diff -Nur linux-4.1.26.orig/drivers/scsi/libsas/sas_ata.c linux-4.1.26/drivers/scsi/libsas/sas_ata.c ---- linux-4.1.26.orig/drivers/scsi/libsas/sas_ata.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/scsi/libsas/sas_ata.c 2016-06-19 15:30:58.651295961 +0200 -@@ -190,7 +190,7 @@ +diff --git a/drivers/scsi/libsas/sas_ata.c b/drivers/scsi/libsas/sas_ata.c +index 9c706d8c1441..d968ffc79c08 100644 +--- a/drivers/scsi/libsas/sas_ata.c ++++ b/drivers/scsi/libsas/sas_ata.c +@@ -190,7 +190,7 @@ static unsigned int sas_ata_qc_issue(struct ata_queued_cmd *qc) /* TODO: audit callers to ensure they are ready for qc_issue to * unconditionally re-enable interrupts */ @@ -8788,7 +9669,7 @@ diff -Nur linux-4.1.26.orig/drivers/scsi/libsas/sas_ata.c linux-4.1.26/drivers/s spin_unlock(ap->lock); /* If the device fell off, no sense in issuing commands */ -@@ -255,7 +255,7 @@ +@@ -255,7 +255,7 @@ static unsigned int sas_ata_qc_issue(struct ata_queued_cmd *qc) out: spin_lock(ap->lock); @@ -8797,10 +9678,11 @@ diff -Nur linux-4.1.26.orig/drivers/scsi/libsas/sas_ata.c linux-4.1.26/drivers/s return ret; } -diff -Nur linux-4.1.26.orig/drivers/scsi/qla2xxx/qla_inline.h linux-4.1.26/drivers/scsi/qla2xxx/qla_inline.h ---- linux-4.1.26.orig/drivers/scsi/qla2xxx/qla_inline.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/scsi/qla2xxx/qla_inline.h 2016-06-19 15:30:58.651295961 +0200 -@@ -59,12 +59,12 @@ +diff --git a/drivers/scsi/qla2xxx/qla_inline.h b/drivers/scsi/qla2xxx/qla_inline.h +index fee9eb7c8a60..b42d4adc42dc 100644 +--- a/drivers/scsi/qla2xxx/qla_inline.h ++++ b/drivers/scsi/qla2xxx/qla_inline.h +@@ -59,12 +59,12 @@ qla2x00_poll(struct rsp_que *rsp) { unsigned long flags; struct qla_hw_data *ha = rsp->hw; @@ -8815,9 +9697,10 @@ diff -Nur linux-4.1.26.orig/drivers/scsi/qla2xxx/qla_inline.h linux-4.1.26/drive } static inline uint8_t * -diff -Nur linux-4.1.26.orig/drivers/thermal/x86_pkg_temp_thermal.c linux-4.1.26/drivers/thermal/x86_pkg_temp_thermal.c ---- linux-4.1.26.orig/drivers/thermal/x86_pkg_temp_thermal.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/thermal/x86_pkg_temp_thermal.c 2016-06-19 15:30:58.651295961 +0200 +diff --git a/drivers/thermal/x86_pkg_temp_thermal.c b/drivers/thermal/x86_pkg_temp_thermal.c +index 9ea3d9d49ffc..9e68706ae5e2 100644 +--- a/drivers/thermal/x86_pkg_temp_thermal.c ++++ b/drivers/thermal/x86_pkg_temp_thermal.c @@ -29,6 +29,7 @@ #include <linux/pm.h> #include <linux/thermal.h> @@ -8826,7 +9709,7 @@ diff -Nur linux-4.1.26.orig/drivers/thermal/x86_pkg_temp_thermal.c linux-4.1.26/ #include <asm/cpu_device_id.h> #include <asm/mce.h> -@@ -352,7 +353,7 @@ +@@ -352,7 +353,7 @@ static void pkg_temp_thermal_threshold_work_fn(struct work_struct *work) } } @@ -8835,7 +9718,7 @@ diff -Nur linux-4.1.26.orig/drivers/thermal/x86_pkg_temp_thermal.c linux-4.1.26/ { unsigned long flags; int cpu = smp_processor_id(); -@@ -369,7 +370,7 @@ +@@ -369,7 +370,7 @@ static int pkg_temp_thermal_platform_thermal_notify(__u64 msr_val) pkg_work_scheduled[phy_id]) { disable_pkg_thres_interrupt(); spin_unlock_irqrestore(&pkg_work_lock, flags); @@ -8844,7 +9727,7 @@ diff -Nur linux-4.1.26.orig/drivers/thermal/x86_pkg_temp_thermal.c linux-4.1.26/ } pkg_work_scheduled[phy_id] = 1; spin_unlock_irqrestore(&pkg_work_lock, flags); -@@ -378,9 +379,48 @@ +@@ -378,9 +379,48 @@ static int pkg_temp_thermal_platform_thermal_notify(__u64 msr_val) schedule_delayed_work_on(cpu, &per_cpu(pkg_temp_thermal_threshold_work, cpu), msecs_to_jiffies(notify_delay_ms)); @@ -8893,7 +9776,7 @@ diff -Nur linux-4.1.26.orig/drivers/thermal/x86_pkg_temp_thermal.c linux-4.1.26/ static int find_siblings_cpu(int cpu) { int i; -@@ -584,6 +624,9 @@ +@@ -584,6 +624,9 @@ static int __init pkg_temp_thermal_init(void) if (!x86_match_cpu(pkg_temp_thermal_ids)) return -ENODEV; @@ -8903,7 +9786,7 @@ diff -Nur linux-4.1.26.orig/drivers/thermal/x86_pkg_temp_thermal.c linux-4.1.26/ spin_lock_init(&pkg_work_lock); platform_thermal_package_notify = pkg_temp_thermal_platform_thermal_notify; -@@ -608,7 +651,7 @@ +@@ -608,7 +651,7 @@ err_ret: kfree(pkg_work_scheduled); platform_thermal_package_notify = NULL; platform_thermal_package_rate_control = NULL; @@ -8912,7 +9795,7 @@ diff -Nur linux-4.1.26.orig/drivers/thermal/x86_pkg_temp_thermal.c linux-4.1.26/ return -ENODEV; } -@@ -633,6 +676,7 @@ +@@ -633,6 +676,7 @@ static void __exit pkg_temp_thermal_exit(void) mutex_unlock(&phy_dev_list_mutex); platform_thermal_package_notify = NULL; platform_thermal_package_rate_control = NULL; @@ -8920,9 +9803,10 @@ diff -Nur linux-4.1.26.orig/drivers/thermal/x86_pkg_temp_thermal.c linux-4.1.26/ for_each_online_cpu(i) cancel_delayed_work_sync( &per_cpu(pkg_temp_thermal_threshold_work, i)); -diff -Nur linux-4.1.26.orig/drivers/tty/serial/8250/8250_core.c linux-4.1.26/drivers/tty/serial/8250/8250_core.c ---- linux-4.1.26.orig/drivers/tty/serial/8250/8250_core.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/tty/serial/8250/8250_core.c 2016-06-19 15:30:58.651295961 +0200 +diff --git a/drivers/tty/serial/8250/8250_core.c b/drivers/tty/serial/8250/8250_core.c +index a64d53f7b1d1..fd96ce65bc31 100644 +--- a/drivers/tty/serial/8250/8250_core.c ++++ b/drivers/tty/serial/8250/8250_core.c @@ -36,6 +36,7 @@ #include <linux/nmi.h> #include <linux/mutex.h> @@ -8931,7 +9815,7 @@ diff -Nur linux-4.1.26.orig/drivers/tty/serial/8250/8250_core.c linux-4.1.26/dri #include <linux/uaccess.h> #include <linux/pm_runtime.h> #ifdef CONFIG_SPARC -@@ -80,7 +81,16 @@ +@@ -80,7 +81,16 @@ static unsigned int skip_txen_test; /* force skip of txen test at init time */ #define DEBUG_INTR(fmt...) do { } while (0) #endif @@ -8949,7 +9833,7 @@ diff -Nur linux-4.1.26.orig/drivers/tty/serial/8250/8250_core.c linux-4.1.26/dri #define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE) -@@ -3372,7 +3382,7 @@ +@@ -3366,7 +3376,7 @@ static void serial8250_console_write(struct uart_8250_port *up, const char *s, if (port->sysrq) locked = 0; @@ -8958,10 +9842,11 @@ diff -Nur linux-4.1.26.orig/drivers/tty/serial/8250/8250_core.c linux-4.1.26/dri locked = spin_trylock_irqsave(&port->lock, flags); else spin_lock_irqsave(&port->lock, flags); -diff -Nur linux-4.1.26.orig/drivers/tty/serial/amba-pl011.c linux-4.1.26/drivers/tty/serial/amba-pl011.c ---- linux-4.1.26.orig/drivers/tty/serial/amba-pl011.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/tty/serial/amba-pl011.c 2016-06-19 15:30:58.651295961 +0200 -@@ -2000,13 +2000,19 @@ +diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c +index 0cc622afb67d..52f45f3029b7 100644 +--- a/drivers/tty/serial/amba-pl011.c ++++ b/drivers/tty/serial/amba-pl011.c +@@ -2000,13 +2000,19 @@ pl011_console_write(struct console *co, const char *s, unsigned int count) clk_enable(uap->clk); @@ -8984,7 +9869,7 @@ diff -Nur linux-4.1.26.orig/drivers/tty/serial/amba-pl011.c linux-4.1.26/drivers /* * First save the CR then disable the interrupts -@@ -2028,8 +2034,7 @@ +@@ -2028,8 +2034,7 @@ pl011_console_write(struct console *co, const char *s, unsigned int count) writew(old_cr, uap->port.membase + UART011_CR); if (locked) @@ -8994,10 +9879,11 @@ diff -Nur linux-4.1.26.orig/drivers/tty/serial/amba-pl011.c linux-4.1.26/drivers clk_disable(uap->clk); } -diff -Nur linux-4.1.26.orig/drivers/tty/serial/omap-serial.c linux-4.1.26/drivers/tty/serial/omap-serial.c ---- linux-4.1.26.orig/drivers/tty/serial/omap-serial.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/tty/serial/omap-serial.c 2016-06-19 15:30:58.651295961 +0200 -@@ -1282,13 +1282,10 @@ +diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c +index 0a88693cd8ca..b89b06ed3b74 100644 +--- a/drivers/tty/serial/omap-serial.c ++++ b/drivers/tty/serial/omap-serial.c +@@ -1282,13 +1282,10 @@ serial_omap_console_write(struct console *co, const char *s, pm_runtime_get_sync(up->dev); @@ -9014,7 +9900,7 @@ diff -Nur linux-4.1.26.orig/drivers/tty/serial/omap-serial.c linux-4.1.26/driver /* * First save the IER then disable the interrupts -@@ -1317,8 +1314,7 @@ +@@ -1317,8 +1314,7 @@ serial_omap_console_write(struct console *co, const char *s, pm_runtime_mark_last_busy(up->dev); pm_runtime_put_autosuspend(up->dev); if (locked) @@ -9024,10 +9910,11 @@ diff -Nur linux-4.1.26.orig/drivers/tty/serial/omap-serial.c linux-4.1.26/driver } static int __init -diff -Nur linux-4.1.26.orig/drivers/usb/core/hcd.c linux-4.1.26/drivers/usb/core/hcd.c ---- linux-4.1.26.orig/drivers/usb/core/hcd.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/usb/core/hcd.c 2016-06-19 15:30:58.655296115 +0200 -@@ -1684,9 +1684,9 @@ +diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c +index 3a49ba2910df..c55c42603849 100644 +--- a/drivers/usb/core/hcd.c ++++ b/drivers/usb/core/hcd.c +@@ -1684,9 +1684,9 @@ static void __usb_hcd_giveback_urb(struct urb *urb) * and no one may trigger the above deadlock situation when * running complete() in tasklet. */ @@ -9039,10 +9926,11 @@ diff -Nur linux-4.1.26.orig/drivers/usb/core/hcd.c linux-4.1.26/drivers/usb/core usb_anchor_resume_wakeups(anchor); atomic_dec(&urb->use_count); -diff -Nur linux-4.1.26.orig/drivers/usb/gadget/function/f_fs.c linux-4.1.26/drivers/usb/gadget/function/f_fs.c ---- linux-4.1.26.orig/drivers/usb/gadget/function/f_fs.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/usb/gadget/function/f_fs.c 2016-06-19 15:30:58.655296115 +0200 -@@ -1404,7 +1404,7 @@ +diff --git a/drivers/usb/gadget/function/f_fs.c b/drivers/usb/gadget/function/f_fs.c +index db9433eed2cc..6536d557abc1 100644 +--- a/drivers/usb/gadget/function/f_fs.c ++++ b/drivers/usb/gadget/function/f_fs.c +@@ -1404,7 +1404,7 @@ static void ffs_data_put(struct ffs_data *ffs) pr_info("%s(): freeing\n", __func__); ffs_data_clear(ffs); BUG_ON(waitqueue_active(&ffs->ev.waitq) || @@ -9051,10 +9939,11 @@ diff -Nur linux-4.1.26.orig/drivers/usb/gadget/function/f_fs.c linux-4.1.26/driv kfree(ffs->dev_name); kfree(ffs); } -diff -Nur linux-4.1.26.orig/drivers/usb/gadget/legacy/inode.c linux-4.1.26/drivers/usb/gadget/legacy/inode.c ---- linux-4.1.26.orig/drivers/usb/gadget/legacy/inode.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/drivers/usb/gadget/legacy/inode.c 2016-06-19 15:30:58.655296115 +0200 -@@ -345,7 +345,7 @@ +diff --git a/drivers/usb/gadget/legacy/inode.c b/drivers/usb/gadget/legacy/inode.c +index bccc5788bb98..8c23636963bc 100644 +--- a/drivers/usb/gadget/legacy/inode.c ++++ b/drivers/usb/gadget/legacy/inode.c +@@ -345,7 +345,7 @@ ep_io (struct ep_data *epdata, void *buf, unsigned len) spin_unlock_irq (&epdata->dev->lock); if (likely (value == 0)) { @@ -9063,7 +9952,7 @@ diff -Nur linux-4.1.26.orig/drivers/usb/gadget/legacy/inode.c linux-4.1.26/drive if (value != 0) { spin_lock_irq (&epdata->dev->lock); if (likely (epdata->ep != NULL)) { -@@ -354,7 +354,7 @@ +@@ -354,7 +354,7 @@ ep_io (struct ep_data *epdata, void *buf, unsigned len) usb_ep_dequeue (epdata->ep, epdata->req); spin_unlock_irq (&epdata->dev->lock); @@ -9072,9 +9961,73 @@ diff -Nur linux-4.1.26.orig/drivers/usb/gadget/legacy/inode.c linux-4.1.26/drive if (epdata->status == -ECONNRESET) epdata->status = -EINTR; } else { -diff -Nur linux-4.1.26.orig/fs/aio.c linux-4.1.26/fs/aio.c ---- linux-4.1.26.orig/fs/aio.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/fs/aio.c 2016-06-19 15:30:58.655296115 +0200 +diff --git a/drivers/usb/gadget/udc/atmel_usba_udc.c b/drivers/usb/gadget/udc/atmel_usba_udc.c +index d6ca3697d3c8..ee6bc64f9656 100644 +--- a/drivers/usb/gadget/udc/atmel_usba_udc.c ++++ b/drivers/usb/gadget/udc/atmel_usba_udc.c +@@ -17,7 +17,9 @@ + #include <linux/device.h> + #include <linux/dma-mapping.h> + #include <linux/list.h> ++#include <linux/mfd/syscon.h> + #include <linux/platform_device.h> ++#include <linux/regmap.h> + #include <linux/usb/ch9.h> + #include <linux/usb/gadget.h> + #include <linux/usb/atmel_usba_udc.h> +@@ -1889,20 +1891,15 @@ static int atmel_usba_stop(struct usb_gadget *gadget) + #ifdef CONFIG_OF + static void at91sam9rl_toggle_bias(struct usba_udc *udc, int is_on) + { +- unsigned int uckr = at91_pmc_read(AT91_CKGR_UCKR); +- +- if (is_on) +- at91_pmc_write(AT91_CKGR_UCKR, uckr | AT91_PMC_BIASEN); +- else +- at91_pmc_write(AT91_CKGR_UCKR, uckr & ~(AT91_PMC_BIASEN)); ++ regmap_update_bits(udc->pmc, AT91_CKGR_UCKR, AT91_PMC_BIASEN, ++ is_on ? AT91_PMC_BIASEN : 0); + } + + static void at91sam9g45_pulse_bias(struct usba_udc *udc) + { +- unsigned int uckr = at91_pmc_read(AT91_CKGR_UCKR); +- +- at91_pmc_write(AT91_CKGR_UCKR, uckr & ~(AT91_PMC_BIASEN)); +- at91_pmc_write(AT91_CKGR_UCKR, uckr | AT91_PMC_BIASEN); ++ regmap_update_bits(udc->pmc, AT91_CKGR_UCKR, AT91_PMC_BIASEN, 0); ++ regmap_update_bits(udc->pmc, AT91_CKGR_UCKR, AT91_PMC_BIASEN, ++ AT91_PMC_BIASEN); + } + + static const struct usba_udc_errata at91sam9rl_errata = { +@@ -1939,6 +1936,9 @@ static struct usba_ep * atmel_udc_of_init(struct platform_device *pdev, + return ERR_PTR(-EINVAL); + + udc->errata = match->data; ++ udc->pmc = syscon_regmap_lookup_by_compatible("atmel,at91sam9g45-pmc"); ++ if (udc->errata && IS_ERR(udc->pmc)) ++ return ERR_CAST(udc->pmc); + + udc->num_ep = 0; + +diff --git a/drivers/usb/gadget/udc/atmel_usba_udc.h b/drivers/usb/gadget/udc/atmel_usba_udc.h +index ea448a344767..3e1c9d589dfa 100644 +--- a/drivers/usb/gadget/udc/atmel_usba_udc.h ++++ b/drivers/usb/gadget/udc/atmel_usba_udc.h +@@ -354,6 +354,8 @@ struct usba_udc { + struct dentry *debugfs_root; + struct dentry *debugfs_regs; + #endif ++ ++ struct regmap *pmc; + }; + + static inline struct usba_ep *to_usba_ep(struct usb_ep *ep) +diff --git a/fs/aio.c b/fs/aio.c +index 480440f4701f..5a2380de4a9b 100644 +--- a/fs/aio.c ++++ b/fs/aio.c @@ -40,6 +40,7 @@ #include <linux/ramfs.h> #include <linux/percpu-refcount.h> @@ -9083,7 +10036,7 @@ diff -Nur linux-4.1.26.orig/fs/aio.c linux-4.1.26/fs/aio.c #include <asm/kmap_types.h> #include <asm/uaccess.h> -@@ -115,7 +116,7 @@ +@@ -115,7 +116,7 @@ struct kioctx { struct page **ring_pages; long nr_pages; @@ -9092,7 +10045,7 @@ diff -Nur linux-4.1.26.orig/fs/aio.c linux-4.1.26/fs/aio.c /* * signals when all in-flight requests are done -@@ -253,6 +254,7 @@ +@@ -253,6 +254,7 @@ static int __init aio_setup(void) .mount = aio_mount, .kill_sb = kill_anon_super, }; @@ -9100,7 +10053,7 @@ diff -Nur linux-4.1.26.orig/fs/aio.c linux-4.1.26/fs/aio.c aio_mnt = kern_mount(&aio_fs); if (IS_ERR(aio_mnt)) panic("Failed to create aio fs mount."); -@@ -559,9 +561,9 @@ +@@ -559,9 +561,9 @@ static int kiocb_cancel(struct aio_kiocb *kiocb) return cancel(&kiocb->common); } @@ -9112,7 +10065,7 @@ diff -Nur linux-4.1.26.orig/fs/aio.c linux-4.1.26/fs/aio.c pr_debug("freeing %p\n", ctx); -@@ -580,8 +582,8 @@ +@@ -580,8 +582,8 @@ static void free_ioctx_reqs(struct percpu_ref *ref) if (ctx->rq_wait && atomic_dec_and_test(&ctx->rq_wait->count)) complete(&ctx->rq_wait->comp); @@ -9123,7 +10076,7 @@ diff -Nur linux-4.1.26.orig/fs/aio.c linux-4.1.26/fs/aio.c } /* -@@ -589,9 +591,9 @@ +@@ -589,9 +591,9 @@ static void free_ioctx_reqs(struct percpu_ref *ref) * and ctx->users has dropped to 0, so we know no more kiocbs can be submitted - * now it's safe to cancel any that need to be. */ @@ -9135,7 +10088,7 @@ diff -Nur linux-4.1.26.orig/fs/aio.c linux-4.1.26/fs/aio.c struct aio_kiocb *req; spin_lock_irq(&ctx->ctx_lock); -@@ -610,6 +612,14 @@ +@@ -610,6 +612,14 @@ static void free_ioctx_users(struct percpu_ref *ref) percpu_ref_put(&ctx->reqs); } @@ -9150,9 +10103,10 @@ diff -Nur linux-4.1.26.orig/fs/aio.c linux-4.1.26/fs/aio.c static int ioctx_add_table(struct kioctx *ctx, struct mm_struct *mm) { unsigned i, new_nr; -diff -Nur linux-4.1.26.orig/fs/autofs4/autofs_i.h linux-4.1.26/fs/autofs4/autofs_i.h ---- linux-4.1.26.orig/fs/autofs4/autofs_i.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/fs/autofs4/autofs_i.h 2016-06-19 15:30:58.655296115 +0200 +diff --git a/fs/autofs4/autofs_i.h b/fs/autofs4/autofs_i.h +index 6196b5eaf9a5..ab37f57136f3 100644 +--- a/fs/autofs4/autofs_i.h ++++ b/fs/autofs4/autofs_i.h @@ -34,6 +34,7 @@ #include <linux/sched.h> #include <linux/mount.h> @@ -9161,10 +10115,11 @@ diff -Nur linux-4.1.26.orig/fs/autofs4/autofs_i.h linux-4.1.26/fs/autofs4/autofs #include <asm/current.h> #include <asm/uaccess.h> -diff -Nur linux-4.1.26.orig/fs/autofs4/expire.c linux-4.1.26/fs/autofs4/expire.c ---- linux-4.1.26.orig/fs/autofs4/expire.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/fs/autofs4/expire.c 2016-06-19 15:30:58.655296115 +0200 -@@ -150,7 +150,7 @@ +diff --git a/fs/autofs4/expire.c b/fs/autofs4/expire.c +index 7a5a598a2d94..d08bcdc30566 100644 +--- a/fs/autofs4/expire.c ++++ b/fs/autofs4/expire.c +@@ -150,7 +150,7 @@ again: parent = p->d_parent; if (!spin_trylock(&parent->d_lock)) { spin_unlock(&p->d_lock); @@ -9173,10 +10128,11 @@ diff -Nur linux-4.1.26.orig/fs/autofs4/expire.c linux-4.1.26/fs/autofs4/expire.c goto relock; } spin_unlock(&p->d_lock); -diff -Nur linux-4.1.26.orig/fs/buffer.c linux-4.1.26/fs/buffer.c ---- linux-4.1.26.orig/fs/buffer.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/fs/buffer.c 2016-06-19 15:30:58.655296115 +0200 -@@ -301,8 +301,7 @@ +diff --git a/fs/buffer.c b/fs/buffer.c +index c7a5602d01ee..2907544c3a1d 100644 +--- a/fs/buffer.c ++++ b/fs/buffer.c +@@ -301,8 +301,7 @@ static void end_buffer_async_read(struct buffer_head *bh, int uptodate) * decide that the page is now completely done. */ first = page_buffers(page); @@ -9186,7 +10142,7 @@ diff -Nur linux-4.1.26.orig/fs/buffer.c linux-4.1.26/fs/buffer.c clear_buffer_async_read(bh); unlock_buffer(bh); tmp = bh; -@@ -315,8 +314,7 @@ +@@ -315,8 +314,7 @@ static void end_buffer_async_read(struct buffer_head *bh, int uptodate) } tmp = tmp->b_this_page; } while (tmp != bh); @@ -9196,7 +10152,7 @@ diff -Nur linux-4.1.26.orig/fs/buffer.c linux-4.1.26/fs/buffer.c /* * If none of the buffers had errors and they are all -@@ -328,9 +326,7 @@ +@@ -328,9 +326,7 @@ static void end_buffer_async_read(struct buffer_head *bh, int uptodate) return; still_busy: @@ -9207,7 +10163,7 @@ diff -Nur linux-4.1.26.orig/fs/buffer.c linux-4.1.26/fs/buffer.c } /* -@@ -358,8 +354,7 @@ +@@ -358,8 +354,7 @@ void end_buffer_async_write(struct buffer_head *bh, int uptodate) } first = page_buffers(page); @@ -9217,7 +10173,7 @@ diff -Nur linux-4.1.26.orig/fs/buffer.c linux-4.1.26/fs/buffer.c clear_buffer_async_write(bh); unlock_buffer(bh); -@@ -371,15 +366,12 @@ +@@ -371,15 +366,12 @@ void end_buffer_async_write(struct buffer_head *bh, int uptodate) } tmp = tmp->b_this_page; } @@ -9235,7 +10191,7 @@ diff -Nur linux-4.1.26.orig/fs/buffer.c linux-4.1.26/fs/buffer.c } EXPORT_SYMBOL(end_buffer_async_write); -@@ -3325,6 +3317,7 @@ +@@ -3325,6 +3317,7 @@ struct buffer_head *alloc_buffer_head(gfp_t gfp_flags) struct buffer_head *ret = kmem_cache_zalloc(bh_cachep, gfp_flags); if (ret) { INIT_LIST_HEAD(&ret->b_assoc_buffers); @@ -9243,9 +10199,10 @@ diff -Nur linux-4.1.26.orig/fs/buffer.c linux-4.1.26/fs/buffer.c preempt_disable(); __this_cpu_inc(bh_accounting.nr); recalc_bh_state(); -diff -Nur linux-4.1.26.orig/fs/dcache.c linux-4.1.26/fs/dcache.c ---- linux-4.1.26.orig/fs/dcache.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/fs/dcache.c 2016-06-19 15:30:58.655296115 +0200 +diff --git a/fs/dcache.c b/fs/dcache.c +index 660857431b1c..c790b2b070ab 100644 +--- a/fs/dcache.c ++++ b/fs/dcache.c @@ -19,6 +19,7 @@ #include <linux/mm.h> #include <linux/fs.h> @@ -9254,16 +10211,38 @@ diff -Nur linux-4.1.26.orig/fs/dcache.c linux-4.1.26/fs/dcache.c #include <linux/slab.h> #include <linux/init.h> #include <linux/hash.h> -@@ -578,7 +579,7 @@ +@@ -747,6 +748,8 @@ static inline bool fast_dput(struct dentry *dentry) + */ + void dput(struct dentry *dentry) + { ++ struct dentry *parent; ++ + if (unlikely(!dentry)) + return; - failed: - spin_unlock(&dentry->d_lock); -- cpu_relax(); -+ cpu_chill(); - return dentry; /* try again with same dentry */ - } +@@ -783,9 +786,18 @@ repeat: + return; -@@ -2388,7 +2389,7 @@ + kill_it: +- dentry = dentry_kill(dentry); +- if (dentry) { +- cond_resched(); ++ parent = dentry_kill(dentry); ++ if (parent) { ++ int r; ++ ++ if (parent == dentry) { ++ /* the task with the highest priority won't schedule */ ++ r = cond_resched(); ++ if (!r) ++ cpu_chill(); ++ } else { ++ dentry = parent; ++ } + goto repeat; + } + } +@@ -2391,7 +2403,7 @@ again: if (dentry->d_lockref.count == 1) { if (!spin_trylock(&inode->i_lock)) { spin_unlock(&dentry->d_lock); @@ -9272,10 +10251,11 @@ diff -Nur linux-4.1.26.orig/fs/dcache.c linux-4.1.26/fs/dcache.c goto again; } dentry->d_flags &= ~DCACHE_CANT_MOUNT; -diff -Nur linux-4.1.26.orig/fs/eventpoll.c linux-4.1.26/fs/eventpoll.c ---- linux-4.1.26.orig/fs/eventpoll.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/fs/eventpoll.c 2016-06-19 15:30:58.655296115 +0200 -@@ -505,12 +505,12 @@ +diff --git a/fs/eventpoll.c b/fs/eventpoll.c +index 1e009cad8d5c..d0c12504d3b4 100644 +--- a/fs/eventpoll.c ++++ b/fs/eventpoll.c +@@ -505,12 +505,12 @@ static int ep_poll_wakeup_proc(void *priv, void *cookie, int call_nests) */ static void ep_poll_safewake(wait_queue_head_t *wq) { @@ -9290,10 +10270,11 @@ diff -Nur linux-4.1.26.orig/fs/eventpoll.c linux-4.1.26/fs/eventpoll.c } static void ep_remove_wait_queue(struct eppoll_entry *pwq) -diff -Nur linux-4.1.26.orig/fs/exec.c linux-4.1.26/fs/exec.c ---- linux-4.1.26.orig/fs/exec.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/fs/exec.c 2016-06-19 15:30:58.659296270 +0200 -@@ -859,12 +859,14 @@ +diff --git a/fs/exec.c b/fs/exec.c +index 1977c2a553ac..0e7125be0283 100644 +--- a/fs/exec.c ++++ b/fs/exec.c +@@ -859,12 +859,14 @@ static int exec_mmap(struct mm_struct *mm) } } task_lock(tsk); @@ -9308,9 +10289,10 @@ diff -Nur linux-4.1.26.orig/fs/exec.c linux-4.1.26/fs/exec.c task_unlock(tsk); if (old_mm) { up_read(&old_mm->mmap_sem); -diff -Nur linux-4.1.26.orig/fs/f2fs/f2fs.h linux-4.1.26/fs/f2fs/f2fs.h ---- linux-4.1.26.orig/fs/f2fs/f2fs.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/fs/f2fs/f2fs.h 2016-06-19 15:30:58.659296270 +0200 +diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h +index 8de34ab6d5b1..4e80270703a4 100644 +--- a/fs/f2fs/f2fs.h ++++ b/fs/f2fs/f2fs.h @@ -22,7 +22,6 @@ #ifdef CONFIG_F2FS_CHECK_FS @@ -9327,7 +10309,7 @@ diff -Nur linux-4.1.26.orig/fs/f2fs/f2fs.h linux-4.1.26/fs/f2fs/f2fs.h #endif /* -@@ -838,7 +836,7 @@ +@@ -838,7 +836,7 @@ static inline void f2fs_unlock_op(struct f2fs_sb_info *sbi) static inline void f2fs_lock_all(struct f2fs_sb_info *sbi) { @@ -9336,10 +10318,11 @@ diff -Nur linux-4.1.26.orig/fs/f2fs/f2fs.h linux-4.1.26/fs/f2fs/f2fs.h } static inline void f2fs_unlock_all(struct f2fs_sb_info *sbi) -diff -Nur linux-4.1.26.orig/fs/jbd/checkpoint.c linux-4.1.26/fs/jbd/checkpoint.c ---- linux-4.1.26.orig/fs/jbd/checkpoint.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/fs/jbd/checkpoint.c 2016-06-19 15:30:58.659296270 +0200 -@@ -129,6 +129,8 @@ +diff --git a/fs/jbd/checkpoint.c b/fs/jbd/checkpoint.c +index 08c03044abdd..95debd71e5fa 100644 +--- a/fs/jbd/checkpoint.c ++++ b/fs/jbd/checkpoint.c +@@ -129,6 +129,8 @@ void __log_wait_for_space(journal_t *journal) if (journal->j_flags & JFS_ABORT) return; spin_unlock(&journal->j_state_lock); @@ -9348,10 +10331,11 @@ diff -Nur linux-4.1.26.orig/fs/jbd/checkpoint.c linux-4.1.26/fs/jbd/checkpoint.c mutex_lock(&journal->j_checkpoint_mutex); /* -diff -Nur linux-4.1.26.orig/fs/jbd2/checkpoint.c linux-4.1.26/fs/jbd2/checkpoint.c ---- linux-4.1.26.orig/fs/jbd2/checkpoint.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/fs/jbd2/checkpoint.c 2016-06-19 15:30:58.659296270 +0200 -@@ -116,6 +116,8 @@ +diff --git a/fs/jbd2/checkpoint.c b/fs/jbd2/checkpoint.c +index 8c44654ce274..78c1545a3fab 100644 +--- a/fs/jbd2/checkpoint.c ++++ b/fs/jbd2/checkpoint.c +@@ -116,6 +116,8 @@ void __jbd2_log_wait_for_space(journal_t *journal) nblocks = jbd2_space_needed(journal); while (jbd2_log_space_left(journal) < nblocks) { write_unlock(&journal->j_state_lock); @@ -9360,9 +10344,10 @@ diff -Nur linux-4.1.26.orig/fs/jbd2/checkpoint.c linux-4.1.26/fs/jbd2/checkpoint mutex_lock(&journal->j_checkpoint_mutex); /* -diff -Nur linux-4.1.26.orig/fs/namespace.c linux-4.1.26/fs/namespace.c ---- linux-4.1.26.orig/fs/namespace.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/fs/namespace.c 2016-06-19 15:30:58.659296270 +0200 +diff --git a/fs/namespace.c b/fs/namespace.c +index 556721fb0cf6..d27cd4633f59 100644 +--- a/fs/namespace.c ++++ b/fs/namespace.c @@ -14,6 +14,7 @@ #include <linux/mnt_namespace.h> #include <linux/user_namespace.h> @@ -9371,7 +10356,7 @@ diff -Nur linux-4.1.26.orig/fs/namespace.c linux-4.1.26/fs/namespace.c #include <linux/security.h> #include <linux/idr.h> #include <linux/init.h> /* init_rootfs */ -@@ -353,8 +354,11 @@ +@@ -353,8 +354,11 @@ int __mnt_want_write(struct vfsmount *m) * incremented count after it has set MNT_WRITE_HOLD. */ smp_mb(); @@ -9385,10 +10370,11 @@ diff -Nur linux-4.1.26.orig/fs/namespace.c linux-4.1.26/fs/namespace.c /* * After the slowpath clears MNT_WRITE_HOLD, mnt_is_readonly will * be set to match its requirements. So we must not load that until -diff -Nur linux-4.1.26.orig/fs/ntfs/aops.c linux-4.1.26/fs/ntfs/aops.c ---- linux-4.1.26.orig/fs/ntfs/aops.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/fs/ntfs/aops.c 2016-06-19 15:30:58.659296270 +0200 -@@ -107,8 +107,7 @@ +diff --git a/fs/ntfs/aops.c b/fs/ntfs/aops.c +index 7521e11db728..f0de4b6b8bf3 100644 +--- a/fs/ntfs/aops.c ++++ b/fs/ntfs/aops.c +@@ -107,8 +107,7 @@ static void ntfs_end_buffer_async_read(struct buffer_head *bh, int uptodate) "0x%llx.", (unsigned long long)bh->b_blocknr); } first = page_buffers(page); @@ -9398,7 +10384,7 @@ diff -Nur linux-4.1.26.orig/fs/ntfs/aops.c linux-4.1.26/fs/ntfs/aops.c clear_buffer_async_read(bh); unlock_buffer(bh); tmp = bh; -@@ -123,8 +122,7 @@ +@@ -123,8 +122,7 @@ static void ntfs_end_buffer_async_read(struct buffer_head *bh, int uptodate) } tmp = tmp->b_this_page; } while (tmp != bh); @@ -9408,7 +10394,7 @@ diff -Nur linux-4.1.26.orig/fs/ntfs/aops.c linux-4.1.26/fs/ntfs/aops.c /* * If none of the buffers had errors then we can set the page uptodate, * but we first have to perform the post read mst fixups, if the -@@ -145,13 +143,13 @@ +@@ -145,13 +143,13 @@ static void ntfs_end_buffer_async_read(struct buffer_head *bh, int uptodate) recs = PAGE_CACHE_SIZE / rec_size; /* Should have been verified before we got here... */ BUG_ON(!recs); @@ -9424,7 +10410,7 @@ diff -Nur linux-4.1.26.orig/fs/ntfs/aops.c linux-4.1.26/fs/ntfs/aops.c flush_dcache_page(page); if (likely(page_uptodate && !PageError(page))) SetPageUptodate(page); -@@ -159,9 +157,7 @@ +@@ -159,9 +157,7 @@ static void ntfs_end_buffer_async_read(struct buffer_head *bh, int uptodate) unlock_page(page); return; still_busy: @@ -9435,10 +10421,11 @@ diff -Nur linux-4.1.26.orig/fs/ntfs/aops.c linux-4.1.26/fs/ntfs/aops.c } /** -diff -Nur linux-4.1.26.orig/fs/timerfd.c linux-4.1.26/fs/timerfd.c ---- linux-4.1.26.orig/fs/timerfd.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/fs/timerfd.c 2016-06-19 15:30:58.659296270 +0200 -@@ -450,7 +450,10 @@ +diff --git a/fs/timerfd.c b/fs/timerfd.c +index b94fa6c3c6eb..64fb86066237 100644 +--- a/fs/timerfd.c ++++ b/fs/timerfd.c +@@ -450,7 +450,10 @@ static int do_timerfd_settime(int ufd, int flags, break; } spin_unlock_irq(&ctx->wqh.lock); @@ -9450,10 +10437,11 @@ diff -Nur linux-4.1.26.orig/fs/timerfd.c linux-4.1.26/fs/timerfd.c } /* -diff -Nur linux-4.1.26.orig/fs/xfs/xfs_inode.c linux-4.1.26/fs/xfs/xfs_inode.c ---- linux-4.1.26.orig/fs/xfs/xfs_inode.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/fs/xfs/xfs_inode.c 2016-06-19 15:30:58.659296270 +0200 -@@ -164,7 +164,7 @@ +diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c +index c29f34253e2b..f30d5b8cd5a1 100644 +--- a/fs/xfs/xfs_inode.c ++++ b/fs/xfs/xfs_inode.c +@@ -164,7 +164,7 @@ xfs_ilock( (XFS_MMAPLOCK_SHARED | XFS_MMAPLOCK_EXCL)); ASSERT((lock_flags & (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)) != (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)); @@ -9462,7 +10450,7 @@ diff -Nur linux-4.1.26.orig/fs/xfs/xfs_inode.c linux-4.1.26/fs/xfs/xfs_inode.c if (lock_flags & XFS_IOLOCK_EXCL) mrupdate_nested(&ip->i_iolock, XFS_IOLOCK_DEP(lock_flags)); -@@ -212,7 +212,7 @@ +@@ -212,7 +212,7 @@ xfs_ilock_nowait( (XFS_MMAPLOCK_SHARED | XFS_MMAPLOCK_EXCL)); ASSERT((lock_flags & (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)) != (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)); @@ -9471,7 +10459,7 @@ diff -Nur linux-4.1.26.orig/fs/xfs/xfs_inode.c linux-4.1.26/fs/xfs/xfs_inode.c if (lock_flags & XFS_IOLOCK_EXCL) { if (!mrtryupdate(&ip->i_iolock)) -@@ -281,7 +281,7 @@ +@@ -281,7 +281,7 @@ xfs_iunlock( (XFS_MMAPLOCK_SHARED | XFS_MMAPLOCK_EXCL)); ASSERT((lock_flags & (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)) != (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)); @@ -9480,7 +10468,7 @@ diff -Nur linux-4.1.26.orig/fs/xfs/xfs_inode.c linux-4.1.26/fs/xfs/xfs_inode.c ASSERT(lock_flags != 0); if (lock_flags & XFS_IOLOCK_EXCL) -@@ -364,30 +364,38 @@ +@@ -364,30 +364,38 @@ int xfs_lock_delays; /* * Bump the subclass so xfs_lock_inodes() acquires each lock with a different @@ -9532,7 +10520,7 @@ diff -Nur linux-4.1.26.orig/fs/xfs/xfs_inode.c linux-4.1.26/fs/xfs/xfs_inode.c } /* -@@ -399,6 +407,11 @@ +@@ -399,6 +407,11 @@ xfs_lock_inumorder(int lock_mode, int subclass) * transaction (such as truncate). This can result in deadlock since the long * running trans might need to wait for the inode we just locked in order to * push the tail and free space in the log. @@ -9544,7 +10532,7 @@ diff -Nur linux-4.1.26.orig/fs/xfs/xfs_inode.c linux-4.1.26/fs/xfs/xfs_inode.c */ void xfs_lock_inodes( -@@ -409,8 +422,29 @@ +@@ -409,8 +422,29 @@ xfs_lock_inodes( int attempts = 0, i, j, try_lock; xfs_log_item_t *lp; @@ -9575,10 +10563,11 @@ diff -Nur linux-4.1.26.orig/fs/xfs/xfs_inode.c linux-4.1.26/fs/xfs/xfs_inode.c try_lock = 0; i = 0; -diff -Nur linux-4.1.26.orig/fs/xfs/xfs_inode.h linux-4.1.26/fs/xfs/xfs_inode.h ---- linux-4.1.26.orig/fs/xfs/xfs_inode.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/fs/xfs/xfs_inode.h 2016-06-19 15:30:58.659296270 +0200 -@@ -284,9 +284,9 @@ +diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h +index 8f22d20368d8..ee26a603c131 100644 +--- a/fs/xfs/xfs_inode.h ++++ b/fs/xfs/xfs_inode.h +@@ -284,9 +284,9 @@ static inline int xfs_isiflocked(struct xfs_inode *ip) * Flags for lockdep annotations. * * XFS_LOCK_PARENT - for directory operations that require locking a @@ -9591,7 +10580,7 @@ diff -Nur linux-4.1.26.orig/fs/xfs/xfs_inode.h linux-4.1.26/fs/xfs/xfs_inode.h * * XFS_LOCK_RTBITMAP/XFS_LOCK_RTSUM - the realtime device bitmap and summary * inodes do not participate in the normal lock order, and thus have their -@@ -295,30 +295,63 @@ +@@ -295,30 +295,63 @@ static inline int xfs_isiflocked(struct xfs_inode *ip) * XFS_LOCK_INUMORDER - for locking several inodes at the some time * with xfs_lock_inodes(). This flag is used as the starting subclass * and each subsequent lock acquired will increment the subclass by one. @@ -9641,22 +10630,29 @@ diff -Nur linux-4.1.26.orig/fs/xfs/xfs_inode.h linux-4.1.26/fs/xfs/xfs_inode.h - -#define XFS_IOLOCK_SHIFT 16 -#define XFS_IOLOCK_PARENT (XFS_LOCK_PARENT << XFS_IOLOCK_SHIFT) +- +-#define XFS_MMAPLOCK_SHIFT 20 +- +-#define XFS_ILOCK_SHIFT 24 +-#define XFS_ILOCK_PARENT (XFS_LOCK_PARENT << XFS_ILOCK_SHIFT) +-#define XFS_ILOCK_RTBITMAP (XFS_LOCK_RTBITMAP << XFS_ILOCK_SHIFT) +-#define XFS_ILOCK_RTSUM (XFS_LOCK_RTSUM << XFS_ILOCK_SHIFT) +- +-#define XFS_IOLOCK_DEP_MASK 0x000f0000 +-#define XFS_MMAPLOCK_DEP_MASK 0x00f00000 +-#define XFS_ILOCK_DEP_MASK 0xff000000 +-#define XFS_LOCK_DEP_MASK (XFS_IOLOCK_DEP_MASK | \ +#define XFS_IOLOCK_SHIFT 16 +#define XFS_IOLOCK_PARENT_VAL 4 +#define XFS_IOLOCK_MAX_SUBCLASS (XFS_IOLOCK_PARENT_VAL - 1) +#define XFS_IOLOCK_DEP_MASK 0x000f0000 +#define XFS_IOLOCK_PARENT (XFS_IOLOCK_PARENT_VAL << XFS_IOLOCK_SHIFT) - --#define XFS_MMAPLOCK_SHIFT 20 ++ +#define XFS_MMAPLOCK_SHIFT 20 +#define XFS_MMAPLOCK_NUMORDER 0 +#define XFS_MMAPLOCK_MAX_SUBCLASS 3 +#define XFS_MMAPLOCK_DEP_MASK 0x00f00000 - --#define XFS_ILOCK_SHIFT 24 --#define XFS_ILOCK_PARENT (XFS_LOCK_PARENT << XFS_ILOCK_SHIFT) --#define XFS_ILOCK_RTBITMAP (XFS_LOCK_RTBITMAP << XFS_ILOCK_SHIFT) --#define XFS_ILOCK_RTSUM (XFS_LOCK_RTSUM << XFS_ILOCK_SHIFT) ++ +#define XFS_ILOCK_SHIFT 24 +#define XFS_ILOCK_PARENT_VAL 5 +#define XFS_ILOCK_MAX_SUBCLASS (XFS_ILOCK_PARENT_VAL - 1) @@ -9666,18 +10662,15 @@ diff -Nur linux-4.1.26.orig/fs/xfs/xfs_inode.h linux-4.1.26/fs/xfs/xfs_inode.h +#define XFS_ILOCK_PARENT (XFS_ILOCK_PARENT_VAL << XFS_ILOCK_SHIFT) +#define XFS_ILOCK_RTBITMAP (XFS_ILOCK_RTBITMAP_VAL << XFS_ILOCK_SHIFT) +#define XFS_ILOCK_RTSUM (XFS_ILOCK_RTSUM_VAL << XFS_ILOCK_SHIFT) - --#define XFS_IOLOCK_DEP_MASK 0x000f0000 --#define XFS_MMAPLOCK_DEP_MASK 0x00f00000 --#define XFS_ILOCK_DEP_MASK 0xff000000 --#define XFS_LOCK_DEP_MASK (XFS_IOLOCK_DEP_MASK | \ ++ +#define XFS_LOCK_SUBCLASS_MASK (XFS_IOLOCK_DEP_MASK | \ XFS_MMAPLOCK_DEP_MASK | \ XFS_ILOCK_DEP_MASK) -diff -Nur linux-4.1.26.orig/include/acpi/platform/aclinux.h linux-4.1.26/include/acpi/platform/aclinux.h ---- linux-4.1.26.orig/include/acpi/platform/aclinux.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/acpi/platform/aclinux.h 2016-06-19 15:30:58.659296270 +0200 +diff --git a/include/acpi/platform/aclinux.h b/include/acpi/platform/aclinux.h +index 74ba46c8157a..ccde2a9ca7b7 100644 +--- a/include/acpi/platform/aclinux.h ++++ b/include/acpi/platform/aclinux.h @@ -123,6 +123,7 @@ #define acpi_cache_t struct kmem_cache @@ -9707,10 +10700,11 @@ diff -Nur linux-4.1.26.orig/include/acpi/platform/aclinux.h linux-4.1.26/include /* * OSL interfaces used by debugger/disassembler */ -diff -Nur linux-4.1.26.orig/include/asm-generic/bug.h linux-4.1.26/include/asm-generic/bug.h ---- linux-4.1.26.orig/include/asm-generic/bug.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/asm-generic/bug.h 2016-06-19 15:30:58.663296424 +0200 -@@ -206,6 +206,20 @@ +diff --git a/include/asm-generic/bug.h b/include/asm-generic/bug.h +index 630dd2372238..850e4d993a88 100644 +--- a/include/asm-generic/bug.h ++++ b/include/asm-generic/bug.h +@@ -206,6 +206,20 @@ extern void warn_slowpath_null(const char *file, const int line); # define WARN_ON_SMP(x) ({0;}) #endif @@ -9731,9 +10725,10 @@ diff -Nur linux-4.1.26.orig/include/asm-generic/bug.h linux-4.1.26/include/asm-g #endif /* __ASSEMBLY__ */ #endif -diff -Nur linux-4.1.26.orig/include/asm-generic/futex.h linux-4.1.26/include/asm-generic/futex.h ---- linux-4.1.26.orig/include/asm-generic/futex.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/asm-generic/futex.h 2016-06-19 15:30:58.663296424 +0200 +diff --git a/include/asm-generic/futex.h b/include/asm-generic/futex.h +index b59b5a52637e..e56272c919b5 100644 +--- a/include/asm-generic/futex.h ++++ b/include/asm-generic/futex.h @@ -8,8 +8,7 @@ #ifndef CONFIG_SMP /* @@ -9744,7 +10739,7 @@ diff -Nur linux-4.1.26.orig/include/asm-generic/futex.h linux-4.1.26/include/asm * */ -@@ -38,6 +37,7 @@ +@@ -38,6 +37,7 @@ futex_atomic_op_inuser(int encoded_op, u32 __user *uaddr) if (encoded_op & (FUTEX_OP_OPARG_SHIFT << 28)) oparg = 1 << oparg; @@ -9752,7 +10747,7 @@ diff -Nur linux-4.1.26.orig/include/asm-generic/futex.h linux-4.1.26/include/asm pagefault_disable(); ret = -EFAULT; -@@ -72,6 +72,7 @@ +@@ -72,6 +72,7 @@ futex_atomic_op_inuser(int encoded_op, u32 __user *uaddr) out_pagefault_enable: pagefault_enable(); @@ -9760,7 +10755,7 @@ diff -Nur linux-4.1.26.orig/include/asm-generic/futex.h linux-4.1.26/include/asm if (ret == 0) { switch (cmp) { -@@ -106,6 +107,7 @@ +@@ -106,6 +107,7 @@ futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr, { u32 val; @@ -9768,7 +10763,7 @@ diff -Nur linux-4.1.26.orig/include/asm-generic/futex.h linux-4.1.26/include/asm if (unlikely(get_user(val, uaddr) != 0)) return -EFAULT; -@@ -113,6 +115,7 @@ +@@ -113,6 +115,7 @@ futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr, return -EFAULT; *uval = val; @@ -9776,10 +10771,40 @@ diff -Nur linux-4.1.26.orig/include/asm-generic/futex.h linux-4.1.26/include/asm return 0; } -diff -Nur linux-4.1.26.orig/include/linux/blkdev.h linux-4.1.26/include/linux/blkdev.h ---- linux-4.1.26.orig/include/linux/blkdev.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/blkdev.h 2016-06-19 15:30:58.663296424 +0200 -@@ -101,6 +101,7 @@ +diff --git a/include/asm-generic/preempt.h b/include/asm-generic/preempt.h +index b6a53e8e526a..c91d3d764c36 100644 +--- a/include/asm-generic/preempt.h ++++ b/include/asm-generic/preempt.h +@@ -7,10 +7,10 @@ + + static __always_inline int preempt_count(void) + { +- return current_thread_info()->preempt_count; ++ return READ_ONCE(current_thread_info()->preempt_count); + } + +-static __always_inline int *preempt_count_ptr(void) ++static __always_inline volatile int *preempt_count_ptr(void) + { + return ¤t_thread_info()->preempt_count; + } +diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h +index 2056a99b92f8..e6ff990c9f11 100644 +--- a/include/linux/blk-mq.h ++++ b/include/linux/blk-mq.h +@@ -202,6 +202,7 @@ static inline u16 blk_mq_unique_tag_to_tag(u32 unique_tag) + + struct blk_mq_hw_ctx *blk_mq_map_queue(struct request_queue *, const int ctx_index); + struct blk_mq_hw_ctx *blk_mq_alloc_single_hw_queue(struct blk_mq_tag_set *, unsigned int, int); ++void __blk_mq_complete_request_remote_work(struct work_struct *work); + + int blk_mq_request_started(struct request *rq); + void blk_mq_start_request(struct request *rq); +diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h +index 5d93a6645e88..37faf63af7f7 100644 +--- a/include/linux/blkdev.h ++++ b/include/linux/blkdev.h +@@ -101,6 +101,7 @@ struct request { struct list_head queuelist; union { struct call_single_data csd; @@ -9787,7 +10812,7 @@ diff -Nur linux-4.1.26.orig/include/linux/blkdev.h linux-4.1.26/include/linux/bl unsigned long fifo_time; }; -@@ -482,7 +483,7 @@ +@@ -482,7 +483,7 @@ struct request_queue { struct throtl_data *td; #endif struct rcu_head rcu_head; @@ -9796,20 +10821,10 @@ diff -Nur linux-4.1.26.orig/include/linux/blkdev.h linux-4.1.26/include/linux/bl struct percpu_ref mq_usage_counter; struct list_head all_q_node; -diff -Nur linux-4.1.26.orig/include/linux/blk-mq.h linux-4.1.26/include/linux/blk-mq.h ---- linux-4.1.26.orig/include/linux/blk-mq.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/blk-mq.h 2016-06-19 15:30:58.663296424 +0200 -@@ -202,6 +202,7 @@ - - struct blk_mq_hw_ctx *blk_mq_map_queue(struct request_queue *, const int ctx_index); - struct blk_mq_hw_ctx *blk_mq_alloc_single_hw_queue(struct blk_mq_tag_set *, unsigned int, int); -+void __blk_mq_complete_request_remote_work(struct work_struct *work); - - int blk_mq_request_started(struct request *rq); - void blk_mq_start_request(struct request *rq); -diff -Nur linux-4.1.26.orig/include/linux/bottom_half.h linux-4.1.26/include/linux/bottom_half.h ---- linux-4.1.26.orig/include/linux/bottom_half.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/bottom_half.h 2016-06-19 15:30:58.663296424 +0200 +diff --git a/include/linux/bottom_half.h b/include/linux/bottom_half.h +index 86c12c93e3cf..d3c0c02acc97 100644 +--- a/include/linux/bottom_half.h ++++ b/include/linux/bottom_half.h @@ -4,6 +4,39 @@ #include <linux/preempt.h> #include <linux/preempt_mask.h> @@ -9850,17 +10865,18 @@ diff -Nur linux-4.1.26.orig/include/linux/bottom_half.h linux-4.1.26/include/lin #ifdef CONFIG_TRACE_IRQFLAGS extern void __local_bh_disable_ip(unsigned long ip, unsigned int cnt); #else -@@ -31,5 +64,6 @@ +@@ -31,5 +64,6 @@ static inline void local_bh_enable(void) { __local_bh_enable_ip(_THIS_IP_, SOFTIRQ_DISABLE_OFFSET); } +#endif #endif /* _LINUX_BH_H */ -diff -Nur linux-4.1.26.orig/include/linux/buffer_head.h linux-4.1.26/include/linux/buffer_head.h ---- linux-4.1.26.orig/include/linux/buffer_head.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/buffer_head.h 2016-06-19 15:30:58.663296424 +0200 -@@ -75,8 +75,52 @@ +diff --git a/include/linux/buffer_head.h b/include/linux/buffer_head.h +index e6797ded700e..6d25afd8b847 100644 +--- a/include/linux/buffer_head.h ++++ b/include/linux/buffer_head.h +@@ -75,8 +75,52 @@ struct buffer_head { struct address_space *b_assoc_map; /* mapping this buffer is associated with */ atomic_t b_count; /* users using this buffer_head */ @@ -9913,10 +10929,11 @@ diff -Nur linux-4.1.26.orig/include/linux/buffer_head.h linux-4.1.26/include/lin /* * macro tricks to expand the set_buffer_foo(), clear_buffer_foo() * and buffer_foo() functions. -diff -Nur linux-4.1.26.orig/include/linux/cgroup-defs.h linux-4.1.26/include/linux/cgroup-defs.h ---- linux-4.1.26.orig/include/linux/cgroup-defs.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/cgroup-defs.h 2016-06-19 15:30:58.663296424 +0200 -@@ -124,6 +124,7 @@ +diff --git a/include/linux/cgroup-defs.h b/include/linux/cgroup-defs.h +index 8d9c7e7a6432..3fd10743e452 100644 +--- a/include/linux/cgroup-defs.h ++++ b/include/linux/cgroup-defs.h +@@ -124,6 +124,7 @@ struct cgroup_subsys_state { /* percpu_ref killing and RCU release */ struct rcu_head rcu_head; struct work_struct destroy_work; @@ -9924,9 +10941,10 @@ diff -Nur linux-4.1.26.orig/include/linux/cgroup-defs.h linux-4.1.26/include/lin }; /* -diff -Nur linux-4.1.26.orig/include/linux/cgroup.h linux-4.1.26/include/linux/cgroup.h ---- linux-4.1.26.orig/include/linux/cgroup.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/cgroup.h 2016-06-19 15:30:58.663296424 +0200 +diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h +index 96a2ecd5aa69..7f08633d839a 100644 +--- a/include/linux/cgroup.h ++++ b/include/linux/cgroup.h @@ -17,6 +17,8 @@ #include <linux/fs.h> #include <linux/seq_file.h> @@ -9936,9 +10954,10 @@ diff -Nur linux-4.1.26.orig/include/linux/cgroup.h linux-4.1.26/include/linux/cg #include <linux/cgroup-defs.h> -diff -Nur linux-4.1.26.orig/include/linux/completion.h linux-4.1.26/include/linux/completion.h ---- linux-4.1.26.orig/include/linux/completion.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/completion.h 2016-06-19 15:30:58.663296424 +0200 +diff --git a/include/linux/completion.h b/include/linux/completion.h +index 5d5aaae3af43..3fe8d14c98c0 100644 +--- a/include/linux/completion.h ++++ b/include/linux/completion.h @@ -7,8 +7,7 @@ * Atomic wait-for-completion handler data structures. * See kernel/sched/completion.c for details. @@ -9963,7 +10982,7 @@ diff -Nur linux-4.1.26.orig/include/linux/completion.h linux-4.1.26/include/linu #define COMPLETION_INITIALIZER_ONSTACK(work) \ ({ init_completion(&work); work; }) -@@ -73,7 +72,7 @@ +@@ -73,7 +72,7 @@ struct completion { static inline void init_completion(struct completion *x) { x->done = 0; @@ -9972,10 +10991,11 @@ diff -Nur linux-4.1.26.orig/include/linux/completion.h linux-4.1.26/include/linu } /** -diff -Nur linux-4.1.26.orig/include/linux/cpu.h linux-4.1.26/include/linux/cpu.h ---- linux-4.1.26.orig/include/linux/cpu.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/cpu.h 2016-06-19 15:30:58.663296424 +0200 -@@ -231,6 +231,8 @@ +diff --git a/include/linux/cpu.h b/include/linux/cpu.h +index c0fb6b1b4712..2a22c7c729bc 100644 +--- a/include/linux/cpu.h ++++ b/include/linux/cpu.h +@@ -231,6 +231,8 @@ extern bool try_get_online_cpus(void); extern void put_online_cpus(void); extern void cpu_hotplug_disable(void); extern void cpu_hotplug_enable(void); @@ -9984,7 +11004,7 @@ diff -Nur linux-4.1.26.orig/include/linux/cpu.h linux-4.1.26/include/linux/cpu.h #define hotcpu_notifier(fn, pri) cpu_notifier(fn, pri) #define __hotcpu_notifier(fn, pri) __cpu_notifier(fn, pri) #define register_hotcpu_notifier(nb) register_cpu_notifier(nb) -@@ -249,6 +251,8 @@ +@@ -249,6 +251,8 @@ static inline void cpu_hotplug_done(void) {} #define put_online_cpus() do { } while (0) #define cpu_hotplug_disable() do { } while (0) #define cpu_hotplug_enable() do { } while (0) @@ -9993,10 +11013,11 @@ diff -Nur linux-4.1.26.orig/include/linux/cpu.h linux-4.1.26/include/linux/cpu.h #define hotcpu_notifier(fn, pri) do { (void)(fn); } while (0) #define __hotcpu_notifier(fn, pri) do { (void)(fn); } while (0) /* These aren't inline functions due to a GCC bug. */ -diff -Nur linux-4.1.26.orig/include/linux/delay.h linux-4.1.26/include/linux/delay.h ---- linux-4.1.26.orig/include/linux/delay.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/delay.h 2016-06-19 15:30:58.663296424 +0200 -@@ -52,4 +52,10 @@ +diff --git a/include/linux/delay.h b/include/linux/delay.h +index a6ecb34cf547..37caab306336 100644 +--- a/include/linux/delay.h ++++ b/include/linux/delay.h +@@ -52,4 +52,10 @@ static inline void ssleep(unsigned int seconds) msleep(seconds * 1000); } @@ -10007,23 +11028,11 @@ diff -Nur linux-4.1.26.orig/include/linux/delay.h linux-4.1.26/include/linux/del +#endif + #endif /* defined(_LINUX_DELAY_H) */ -diff -Nur linux-4.1.26.orig/include/linux/ftrace_event.h linux-4.1.26/include/linux/ftrace_event.h ---- linux-4.1.26.orig/include/linux/ftrace_event.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/ftrace_event.h 2016-06-19 15:30:58.663296424 +0200 -@@ -66,6 +66,9 @@ - unsigned char flags; - unsigned char preempt_count; - int pid; -+ unsigned short migrate_disable; -+ unsigned short padding; -+ unsigned char preempt_lazy_count; - }; - - #define FTRACE_MAX_EVENT \ -diff -Nur linux-4.1.26.orig/include/linux/ftrace.h linux-4.1.26/include/linux/ftrace.h ---- linux-4.1.26.orig/include/linux/ftrace.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/ftrace.h 2016-06-19 15:30:58.663296424 +0200 -@@ -682,6 +682,18 @@ +diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h +index 6cd8c0ee4b6f..1ec37fef6355 100644 +--- a/include/linux/ftrace.h ++++ b/include/linux/ftrace.h +@@ -682,6 +682,18 @@ static inline void __ftrace_enabled_restore(int enabled) #define CALLER_ADDR5 ((unsigned long)ftrace_return_address(5)) #define CALLER_ADDR6 ((unsigned long)ftrace_return_address(6)) @@ -10042,9 +11051,24 @@ diff -Nur linux-4.1.26.orig/include/linux/ftrace.h linux-4.1.26/include/linux/ft #ifdef CONFIG_IRQSOFF_TRACER extern void time_hardirqs_on(unsigned long a0, unsigned long a1); extern void time_hardirqs_off(unsigned long a0, unsigned long a1); -diff -Nur linux-4.1.26.orig/include/linux/highmem.h linux-4.1.26/include/linux/highmem.h ---- linux-4.1.26.orig/include/linux/highmem.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/highmem.h 2016-06-19 15:30:58.663296424 +0200 +diff --git a/include/linux/ftrace_event.h b/include/linux/ftrace_event.h +index f9ecf63d47f1..2ef42aa7e484 100644 +--- a/include/linux/ftrace_event.h ++++ b/include/linux/ftrace_event.h +@@ -66,6 +66,9 @@ struct trace_entry { + unsigned char flags; + unsigned char preempt_count; + int pid; ++ unsigned short migrate_disable; ++ unsigned short padding; ++ unsigned char preempt_lazy_count; + }; + + #define FTRACE_MAX_EVENT \ +diff --git a/include/linux/highmem.h b/include/linux/highmem.h +index 9286a46b7d69..06bae5a6761d 100644 +--- a/include/linux/highmem.h ++++ b/include/linux/highmem.h @@ -7,6 +7,7 @@ #include <linux/mm.h> #include <linux/uaccess.h> @@ -10053,7 +11077,7 @@ diff -Nur linux-4.1.26.orig/include/linux/highmem.h linux-4.1.26/include/linux/h #include <asm/cacheflush.h> -@@ -65,6 +66,7 @@ +@@ -65,6 +66,7 @@ static inline void kunmap(struct page *page) static inline void *kmap_atomic(struct page *page) { @@ -10061,7 +11085,7 @@ diff -Nur linux-4.1.26.orig/include/linux/highmem.h linux-4.1.26/include/linux/h pagefault_disable(); return page_address(page); } -@@ -73,6 +75,7 @@ +@@ -73,6 +75,7 @@ static inline void *kmap_atomic(struct page *page) static inline void __kunmap_atomic(void *addr) { pagefault_enable(); @@ -10069,7 +11093,7 @@ diff -Nur linux-4.1.26.orig/include/linux/highmem.h linux-4.1.26/include/linux/h } #define kmap_atomic_pfn(pfn) kmap_atomic(pfn_to_page(pfn)) -@@ -85,32 +88,51 @@ +@@ -85,32 +88,51 @@ static inline void __kunmap_atomic(void *addr) #if defined(CONFIG_HIGHMEM) || defined(CONFIG_X86_32) @@ -10125,10 +11149,11 @@ diff -Nur linux-4.1.26.orig/include/linux/highmem.h linux-4.1.26/include/linux/h #endif } -diff -Nur linux-4.1.26.orig/include/linux/hrtimer.h linux-4.1.26/include/linux/hrtimer.h ---- linux-4.1.26.orig/include/linux/hrtimer.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/hrtimer.h 2016-06-19 15:30:58.663296424 +0200 -@@ -111,6 +111,11 @@ +diff --git a/include/linux/hrtimer.h b/include/linux/hrtimer.h +index 05f6df1fdf5b..64e1abb3715b 100644 +--- a/include/linux/hrtimer.h ++++ b/include/linux/hrtimer.h +@@ -111,6 +111,11 @@ struct hrtimer { enum hrtimer_restart (*function)(struct hrtimer *); struct hrtimer_clock_base *base; unsigned long state; @@ -10140,7 +11165,7 @@ diff -Nur linux-4.1.26.orig/include/linux/hrtimer.h linux-4.1.26/include/linux/h #ifdef CONFIG_TIMER_STATS int start_pid; void *start_site; -@@ -147,6 +152,7 @@ +@@ -147,6 +152,7 @@ struct hrtimer_clock_base { int index; clockid_t clockid; struct timerqueue_head active; @@ -10148,7 +11173,7 @@ diff -Nur linux-4.1.26.orig/include/linux/hrtimer.h linux-4.1.26/include/linux/h ktime_t resolution; ktime_t (*get_time)(void); ktime_t softirq_time; -@@ -194,6 +200,9 @@ +@@ -194,6 +200,9 @@ struct hrtimer_cpu_base { unsigned long nr_hangs; ktime_t max_hang_time; #endif @@ -10158,7 +11183,7 @@ diff -Nur linux-4.1.26.orig/include/linux/hrtimer.h linux-4.1.26/include/linux/h struct hrtimer_clock_base clock_base[HRTIMER_MAX_CLOCK_BASES]; }; -@@ -381,6 +390,13 @@ +@@ -381,6 +390,13 @@ static inline int hrtimer_restart(struct hrtimer *timer) return hrtimer_start_expires(timer, HRTIMER_MODE_ABS); } @@ -10172,10 +11197,11 @@ diff -Nur linux-4.1.26.orig/include/linux/hrtimer.h linux-4.1.26/include/linux/h /* Query timers: */ extern ktime_t hrtimer_get_remaining(const struct hrtimer *timer); extern int hrtimer_get_res(const clockid_t which_clock, struct timespec *tp); -diff -Nur linux-4.1.26.orig/include/linux/idr.h linux-4.1.26/include/linux/idr.h ---- linux-4.1.26.orig/include/linux/idr.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/idr.h 2016-06-19 15:30:58.663296424 +0200 -@@ -95,10 +95,14 @@ +diff --git a/include/linux/idr.h b/include/linux/idr.h +index 013fd9bc4cb6..f62be0aec911 100644 +--- a/include/linux/idr.h ++++ b/include/linux/idr.h +@@ -95,10 +95,14 @@ bool idr_is_empty(struct idr *idp); * Each idr_preload() should be matched with an invocation of this * function. See idr_preload() for details. */ @@ -10190,10 +11216,11 @@ diff -Nur linux-4.1.26.orig/include/linux/idr.h linux-4.1.26/include/linux/idr.h /** * idr_find - return pointer for given id -diff -Nur linux-4.1.26.orig/include/linux/init_task.h linux-4.1.26/include/linux/init_task.h ---- linux-4.1.26.orig/include/linux/init_task.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/init_task.h 2016-06-19 15:30:58.667296578 +0200 -@@ -147,9 +147,16 @@ +diff --git a/include/linux/init_task.h b/include/linux/init_task.h +index 696d22312b31..4a77d39ff7dd 100644 +--- a/include/linux/init_task.h ++++ b/include/linux/init_task.h +@@ -147,9 +147,16 @@ extern struct task_group root_task_group; # define INIT_PERF_EVENTS(tsk) #endif @@ -10211,7 +11238,7 @@ diff -Nur linux-4.1.26.orig/include/linux/init_task.h linux-4.1.26/include/linux .vtime_snap = 0, \ .vtime_snap_whence = VTIME_SYS, #else -@@ -238,6 +245,7 @@ +@@ -238,6 +245,7 @@ extern struct task_group root_task_group; .cpu_timers = INIT_CPU_TIMERS(tsk.cpu_timers), \ .pi_lock = __RAW_SPIN_LOCK_UNLOCKED(tsk.pi_lock), \ .timer_slack_ns = 50000, /* 50 usec default slack */ \ @@ -10219,9 +11246,10 @@ diff -Nur linux-4.1.26.orig/include/linux/init_task.h linux-4.1.26/include/linux .pids = { \ [PIDTYPE_PID] = INIT_PID_LINK(PIDTYPE_PID), \ [PIDTYPE_PGID] = INIT_PID_LINK(PIDTYPE_PGID), \ -diff -Nur linux-4.1.26.orig/include/linux/interrupt.h linux-4.1.26/include/linux/interrupt.h ---- linux-4.1.26.orig/include/linux/interrupt.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/interrupt.h 2016-06-19 15:30:58.667296578 +0200 +diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h +index 950ae4501826..d11fd0a440ff 100644 +--- a/include/linux/interrupt.h ++++ b/include/linux/interrupt.h @@ -61,6 +61,7 @@ * interrupt handler after suspending interrupts. For system * wakeup devices users need to implement wakeup detection in @@ -10238,7 +11266,7 @@ diff -Nur linux-4.1.26.orig/include/linux/interrupt.h linux-4.1.26/include/linux #define IRQF_TIMER (__IRQF_TIMER | IRQF_NO_SUSPEND | IRQF_NO_THREAD) -@@ -102,6 +104,7 @@ +@@ -102,6 +104,7 @@ typedef irqreturn_t (*irq_handler_t)(int, void *); * @flags: flags (see IRQF_* above) * @thread_fn: interrupt handler function for threaded interrupts * @thread: thread pointer for threaded interrupts @@ -10246,7 +11274,7 @@ diff -Nur linux-4.1.26.orig/include/linux/interrupt.h linux-4.1.26/include/linux * @thread_flags: flags related to @thread * @thread_mask: bitmask for keeping track of @thread activity * @dir: pointer to the proc/irq/NN/name entry -@@ -113,6 +116,7 @@ +@@ -113,6 +116,7 @@ struct irqaction { struct irqaction *next; irq_handler_t thread_fn; struct task_struct *thread; @@ -10254,7 +11282,7 @@ diff -Nur linux-4.1.26.orig/include/linux/interrupt.h linux-4.1.26/include/linux unsigned int irq; unsigned int flags; unsigned long thread_flags; -@@ -184,7 +188,7 @@ +@@ -184,7 +188,7 @@ extern void devm_free_irq(struct device *dev, unsigned int irq, void *dev_id); #ifdef CONFIG_LOCKDEP # define local_irq_enable_in_hardirq() do { } while (0) #else @@ -10263,7 +11291,7 @@ diff -Nur linux-4.1.26.orig/include/linux/interrupt.h linux-4.1.26/include/linux #endif extern void disable_irq_nosync(unsigned int irq); -@@ -215,6 +219,7 @@ +@@ -215,6 +219,7 @@ struct irq_affinity_notify { unsigned int irq; struct kref kref; struct work_struct work; @@ -10271,7 +11299,7 @@ diff -Nur linux-4.1.26.orig/include/linux/interrupt.h linux-4.1.26/include/linux void (*notify)(struct irq_affinity_notify *, const cpumask_t *mask); void (*release)(struct kref *ref); }; -@@ -377,9 +382,13 @@ +@@ -377,9 +382,13 @@ extern int irq_set_irqchip_state(unsigned int irq, enum irqchip_irq_state which, bool state); #ifdef CONFIG_IRQ_FORCED_THREADING @@ -10286,7 +11314,7 @@ diff -Nur linux-4.1.26.orig/include/linux/interrupt.h linux-4.1.26/include/linux #endif #ifndef __ARCH_SET_SOFTIRQ_PENDING -@@ -435,9 +444,10 @@ +@@ -435,9 +444,10 @@ struct softirq_action void (*action)(struct softirq_action *); }; @@ -10298,7 +11326,7 @@ diff -Nur linux-4.1.26.orig/include/linux/interrupt.h linux-4.1.26/include/linux #ifdef __ARCH_HAS_DO_SOFTIRQ void do_softirq_own_stack(void); #else -@@ -446,13 +456,25 @@ +@@ -446,13 +456,25 @@ static inline void do_softirq_own_stack(void) __do_softirq(); } #endif @@ -10324,7 +11352,7 @@ diff -Nur linux-4.1.26.orig/include/linux/interrupt.h linux-4.1.26/include/linux DECLARE_PER_CPU(struct task_struct *, ksoftirqd); -@@ -474,8 +496,9 @@ +@@ -474,8 +496,9 @@ static inline struct task_struct *this_cpu_ksoftirqd(void) to be executed on some cpu at least once after this. * If the tasklet is already scheduled, but its execution is still not started, it will be executed only once. @@ -10336,7 +11364,7 @@ diff -Nur linux-4.1.26.orig/include/linux/interrupt.h linux-4.1.26/include/linux * Tasklet is strictly serialized wrt itself, but not wrt another tasklets. If client needs some intertask synchronization, he makes it with spinlocks. -@@ -500,27 +523,36 @@ +@@ -500,27 +523,36 @@ struct tasklet_struct name = { NULL, 0, ATOMIC_INIT(1), func, data } enum { TASKLET_STATE_SCHED, /* Tasklet is scheduled for execution */ @@ -10379,7 +11407,7 @@ diff -Nur linux-4.1.26.orig/include/linux/interrupt.h linux-4.1.26/include/linux #define tasklet_unlock_wait(t) do { } while (0) #define tasklet_unlock(t) do { } while (0) #endif -@@ -569,12 +601,7 @@ +@@ -569,12 +601,7 @@ static inline void tasklet_disable(struct tasklet_struct *t) smp_mb(); } @@ -10393,7 +11421,7 @@ diff -Nur linux-4.1.26.orig/include/linux/interrupt.h linux-4.1.26/include/linux extern void tasklet_kill(struct tasklet_struct *t); extern void tasklet_kill_immediate(struct tasklet_struct *t, unsigned int cpu); extern void tasklet_init(struct tasklet_struct *t, -@@ -605,6 +632,12 @@ +@@ -605,6 +632,12 @@ void tasklet_hrtimer_cancel(struct tasklet_hrtimer *ttimer) tasklet_kill(&ttimer->tasklet); } @@ -10406,10 +11434,11 @@ diff -Nur linux-4.1.26.orig/include/linux/interrupt.h linux-4.1.26/include/linux /* * Autoprobing for irqs: * -diff -Nur linux-4.1.26.orig/include/linux/io-mapping.h linux-4.1.26/include/linux/io-mapping.h ---- linux-4.1.26.orig/include/linux/io-mapping.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/io-mapping.h 2016-06-19 15:30:58.667296578 +0200 -@@ -141,6 +141,7 @@ +diff --git a/include/linux/io-mapping.h b/include/linux/io-mapping.h +index 657fab4efab3..c27dde7215b5 100644 +--- a/include/linux/io-mapping.h ++++ b/include/linux/io-mapping.h +@@ -141,6 +141,7 @@ static inline void __iomem * io_mapping_map_atomic_wc(struct io_mapping *mapping, unsigned long offset) { @@ -10417,7 +11446,7 @@ diff -Nur linux-4.1.26.orig/include/linux/io-mapping.h linux-4.1.26/include/linu pagefault_disable(); return ((char __force __iomem *) mapping) + offset; } -@@ -149,6 +150,7 @@ +@@ -149,6 +150,7 @@ static inline void io_mapping_unmap_atomic(void __iomem *vaddr) { pagefault_enable(); @@ -10425,10 +11454,62 @@ diff -Nur linux-4.1.26.orig/include/linux/io-mapping.h linux-4.1.26/include/linu } /* Non-atomic map/unmap */ -diff -Nur linux-4.1.26.orig/include/linux/irqdesc.h linux-4.1.26/include/linux/irqdesc.h ---- linux-4.1.26.orig/include/linux/irqdesc.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/irqdesc.h 2016-06-19 15:30:58.667296578 +0200 -@@ -63,6 +63,7 @@ +diff --git a/include/linux/irq.h b/include/linux/irq.h +index 33475a37f1bb..00e8834d2e02 100644 +--- a/include/linux/irq.h ++++ b/include/linux/irq.h +@@ -72,6 +72,7 @@ enum irqchip_irq_state; + * IRQ_IS_POLLED - Always polled by another interrupt. Exclude + * it from the spurious interrupt detection + * mechanism and from core side polling. ++ * IRQ_NO_SOFTIRQ_CALL - No softirq processing in the irq thread context (RT) + */ + enum { + IRQ_TYPE_NONE = 0x00000000, +@@ -97,13 +98,14 @@ enum { + IRQ_NOTHREAD = (1 << 16), + IRQ_PER_CPU_DEVID = (1 << 17), + IRQ_IS_POLLED = (1 << 18), ++ IRQ_NO_SOFTIRQ_CALL = (1 << 19), + }; + + #define IRQF_MODIFY_MASK \ + (IRQ_TYPE_SENSE_MASK | IRQ_NOPROBE | IRQ_NOREQUEST | \ + IRQ_NOAUTOEN | IRQ_MOVE_PCNTXT | IRQ_LEVEL | IRQ_NO_BALANCING | \ + IRQ_PER_CPU | IRQ_NESTED_THREAD | IRQ_NOTHREAD | IRQ_PER_CPU_DEVID | \ +- IRQ_IS_POLLED) ++ IRQ_IS_POLLED | IRQ_NO_SOFTIRQ_CALL) + + #define IRQ_NO_BALANCING_MASK (IRQ_PER_CPU | IRQ_NO_BALANCING) + +diff --git a/include/linux/irq_work.h b/include/linux/irq_work.h +index 47b9ebd4a74f..2543aab05daa 100644 +--- a/include/linux/irq_work.h ++++ b/include/linux/irq_work.h +@@ -16,6 +16,7 @@ + #define IRQ_WORK_BUSY 2UL + #define IRQ_WORK_FLAGS 3UL + #define IRQ_WORK_LAZY 4UL /* Doesn't want IPI, wait for tick */ ++#define IRQ_WORK_HARD_IRQ 8UL /* Run hard IRQ context, even on RT */ + + struct irq_work { + unsigned long flags; +@@ -51,4 +52,10 @@ static inline bool irq_work_needs_cpu(void) { return false; } + static inline void irq_work_run(void) { } + #endif + ++#if defined(CONFIG_IRQ_WORK) && defined(CONFIG_PREEMPT_RT_FULL) ++void irq_work_tick_soft(void); ++#else ++static inline void irq_work_tick_soft(void) { } ++#endif ++ + #endif /* _LINUX_IRQ_WORK_H */ +diff --git a/include/linux/irqdesc.h b/include/linux/irqdesc.h +index dd1109fb241e..9d97cd5bb7c7 100644 +--- a/include/linux/irqdesc.h ++++ b/include/linux/irqdesc.h +@@ -63,6 +63,7 @@ struct irq_desc { unsigned int irqs_unhandled; atomic_t threads_handled; int threads_handled_last; @@ -10436,9 +11517,10 @@ diff -Nur linux-4.1.26.orig/include/linux/irqdesc.h linux-4.1.26/include/linux/i raw_spinlock_t lock; struct cpumask *percpu_enabled; #ifdef CONFIG_SMP -diff -Nur linux-4.1.26.orig/include/linux/irqflags.h linux-4.1.26/include/linux/irqflags.h ---- linux-4.1.26.orig/include/linux/irqflags.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/irqflags.h 2016-06-19 15:30:58.667296578 +0200 +diff --git a/include/linux/irqflags.h b/include/linux/irqflags.h +index 5dd1272d1ab2..9b77034f7c5e 100644 +--- a/include/linux/irqflags.h ++++ b/include/linux/irqflags.h @@ -25,8 +25,6 @@ # define trace_softirqs_enabled(p) ((p)->softirqs_enabled) # define trace_hardirq_enter() do { current->hardirq_context++; } while (0) @@ -10489,59 +11571,11 @@ diff -Nur linux-4.1.26.orig/include/linux/irqflags.h linux-4.1.26/include/linux/ +#endif + #endif -diff -Nur linux-4.1.26.orig/include/linux/irq.h linux-4.1.26/include/linux/irq.h ---- linux-4.1.26.orig/include/linux/irq.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/irq.h 2016-06-19 15:30:58.667296578 +0200 -@@ -72,6 +72,7 @@ - * IRQ_IS_POLLED - Always polled by another interrupt. Exclude - * it from the spurious interrupt detection - * mechanism and from core side polling. -+ * IRQ_NO_SOFTIRQ_CALL - No softirq processing in the irq thread context (RT) - */ - enum { - IRQ_TYPE_NONE = 0x00000000, -@@ -97,13 +98,14 @@ - IRQ_NOTHREAD = (1 << 16), - IRQ_PER_CPU_DEVID = (1 << 17), - IRQ_IS_POLLED = (1 << 18), -+ IRQ_NO_SOFTIRQ_CALL = (1 << 19), - }; - - #define IRQF_MODIFY_MASK \ - (IRQ_TYPE_SENSE_MASK | IRQ_NOPROBE | IRQ_NOREQUEST | \ - IRQ_NOAUTOEN | IRQ_MOVE_PCNTXT | IRQ_LEVEL | IRQ_NO_BALANCING | \ - IRQ_PER_CPU | IRQ_NESTED_THREAD | IRQ_NOTHREAD | IRQ_PER_CPU_DEVID | \ -- IRQ_IS_POLLED) -+ IRQ_IS_POLLED | IRQ_NO_SOFTIRQ_CALL) - - #define IRQ_NO_BALANCING_MASK (IRQ_PER_CPU | IRQ_NO_BALANCING) - -diff -Nur linux-4.1.26.orig/include/linux/irq_work.h linux-4.1.26/include/linux/irq_work.h ---- linux-4.1.26.orig/include/linux/irq_work.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/irq_work.h 2016-06-19 15:30:58.667296578 +0200 -@@ -16,6 +16,7 @@ - #define IRQ_WORK_BUSY 2UL - #define IRQ_WORK_FLAGS 3UL - #define IRQ_WORK_LAZY 4UL /* Doesn't want IPI, wait for tick */ -+#define IRQ_WORK_HARD_IRQ 8UL /* Run hard IRQ context, even on RT */ - - struct irq_work { - unsigned long flags; -@@ -51,4 +52,10 @@ - static inline void irq_work_run(void) { } - #endif - -+#if defined(CONFIG_IRQ_WORK) && defined(CONFIG_PREEMPT_RT_FULL) -+void irq_work_tick_soft(void); -+#else -+static inline void irq_work_tick_soft(void) { } -+#endif -+ - #endif /* _LINUX_IRQ_WORK_H */ -diff -Nur linux-4.1.26.orig/include/linux/jbd_common.h linux-4.1.26/include/linux/jbd_common.h ---- linux-4.1.26.orig/include/linux/jbd_common.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/jbd_common.h 2016-06-19 15:30:58.667296578 +0200 -@@ -15,32 +15,56 @@ +diff --git a/include/linux/jbd_common.h b/include/linux/jbd_common.h +index 3dc53432355f..a90a6f5ca899 100644 +--- a/include/linux/jbd_common.h ++++ b/include/linux/jbd_common.h +@@ -15,32 +15,56 @@ static inline struct journal_head *bh2jh(struct buffer_head *bh) static inline void jbd_lock_bh_state(struct buffer_head *bh) { @@ -10598,10 +11632,11 @@ diff -Nur linux-4.1.26.orig/include/linux/jbd_common.h linux-4.1.26/include/linu } #endif -diff -Nur linux-4.1.26.orig/include/linux/kdb.h linux-4.1.26/include/linux/kdb.h ---- linux-4.1.26.orig/include/linux/kdb.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/kdb.h 2016-06-19 15:30:58.667296578 +0200 -@@ -167,6 +167,7 @@ +diff --git a/include/linux/kdb.h b/include/linux/kdb.h +index a19bcf9e762e..897495386446 100644 +--- a/include/linux/kdb.h ++++ b/include/linux/kdb.h +@@ -167,6 +167,7 @@ extern __printf(2, 0) int vkdb_printf(enum kdb_msgsrc src, const char *fmt, extern __printf(1, 2) int kdb_printf(const char *, ...); typedef __printf(1, 2) int (*kdb_printf_t)(const char *, ...); @@ -10609,7 +11644,7 @@ diff -Nur linux-4.1.26.orig/include/linux/kdb.h linux-4.1.26/include/linux/kdb.h extern void kdb_init(int level); /* Access to kdb specific polling devices */ -@@ -201,6 +202,7 @@ +@@ -201,6 +202,7 @@ extern int kdb_register_flags(char *, kdb_func_t, char *, char *, extern int kdb_unregister(char *); #else /* ! CONFIG_KGDB_KDB */ static inline __printf(1, 2) int kdb_printf(const char *fmt, ...) { return 0; } @@ -10617,10 +11652,11 @@ diff -Nur linux-4.1.26.orig/include/linux/kdb.h linux-4.1.26/include/linux/kdb.h static inline void kdb_init(int level) {} static inline int kdb_register(char *cmd, kdb_func_t func, char *usage, char *help, short minlen) { return 0; } -diff -Nur linux-4.1.26.orig/include/linux/kernel.h linux-4.1.26/include/linux/kernel.h ---- linux-4.1.26.orig/include/linux/kernel.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/kernel.h 2016-06-19 15:30:58.667296578 +0200 -@@ -188,6 +188,9 @@ +diff --git a/include/linux/kernel.h b/include/linux/kernel.h +index d837f2a41665..2f4ce318c4fb 100644 +--- a/include/linux/kernel.h ++++ b/include/linux/kernel.h +@@ -188,6 +188,9 @@ extern int _cond_resched(void); */ # define might_sleep() \ do { __might_sleep(__FILE__, __LINE__, 0); might_resched(); } while (0) @@ -10630,7 +11666,7 @@ diff -Nur linux-4.1.26.orig/include/linux/kernel.h linux-4.1.26/include/linux/ke # define sched_annotate_sleep() (current->task_state_change = 0) #else static inline void ___might_sleep(const char *file, int line, -@@ -195,6 +198,7 @@ +@@ -195,6 +198,7 @@ extern int _cond_resched(void); static inline void __might_sleep(const char *file, int line, int preempt_offset) { } # define might_sleep() do { might_resched(); } while (0) @@ -10638,7 +11674,7 @@ diff -Nur linux-4.1.26.orig/include/linux/kernel.h linux-4.1.26/include/linux/ke # define sched_annotate_sleep() do { } while (0) #endif -@@ -244,7 +248,8 @@ +@@ -244,7 +248,8 @@ static inline u32 reciprocal_scale(u32 val, u32 ep_ro) #if defined(CONFIG_MMU) && \ (defined(CONFIG_PROVE_LOCKING) || defined(CONFIG_DEBUG_ATOMIC_SLEEP)) @@ -10648,7 +11684,7 @@ diff -Nur linux-4.1.26.orig/include/linux/kernel.h linux-4.1.26/include/linux/ke #else static inline void might_fault(void) { } #endif -@@ -466,6 +471,7 @@ +@@ -466,6 +471,7 @@ extern enum system_states { SYSTEM_HALT, SYSTEM_POWER_OFF, SYSTEM_RESTART, @@ -10656,10 +11692,11 @@ diff -Nur linux-4.1.26.orig/include/linux/kernel.h linux-4.1.26/include/linux/ke } system_state; #define TAINT_PROPRIETARY_MODULE 0 -diff -Nur linux-4.1.26.orig/include/linux/kvm_host.h linux-4.1.26/include/linux/kvm_host.h ---- linux-4.1.26.orig/include/linux/kvm_host.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/kvm_host.h 2016-06-19 15:30:58.667296578 +0200 -@@ -230,7 +230,7 @@ +diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h +index 29a57a5b7cee..a081a0316379 100644 +--- a/include/linux/kvm_host.h ++++ b/include/linux/kvm_host.h +@@ -230,7 +230,7 @@ struct kvm_vcpu { int fpu_active; int guest_fpu_loaded, guest_xcr0_loaded; @@ -10668,7 +11705,7 @@ diff -Nur linux-4.1.26.orig/include/linux/kvm_host.h linux-4.1.26/include/linux/ struct pid *pid; int sigset_active; sigset_t sigset; -@@ -701,7 +701,7 @@ +@@ -701,7 +701,7 @@ static inline bool kvm_arch_has_noncoherent_dma(struct kvm *kvm) } #endif @@ -10677,9 +11714,10 @@ diff -Nur linux-4.1.26.orig/include/linux/kvm_host.h linux-4.1.26/include/linux/ { #ifdef __KVM_HAVE_ARCH_WQP return vcpu->arch.wqp; -diff -Nur linux-4.1.26.orig/include/linux/lglock.h linux-4.1.26/include/linux/lglock.h ---- linux-4.1.26.orig/include/linux/lglock.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/lglock.h 2016-06-19 15:30:58.667296578 +0200 +diff --git a/include/linux/lglock.h b/include/linux/lglock.h +index 0081f000e34b..9603a1500267 100644 +--- a/include/linux/lglock.h ++++ b/include/linux/lglock.h @@ -34,22 +34,39 @@ #endif @@ -10722,7 +11760,7 @@ diff -Nur linux-4.1.26.orig/include/linux/lglock.h linux-4.1.26/include/linux/lg void lg_lock_init(struct lglock *lg, char *name); void lg_local_lock(struct lglock *lg); -@@ -59,6 +76,12 @@ +@@ -59,6 +76,12 @@ void lg_local_unlock_cpu(struct lglock *lg, int cpu); void lg_global_lock(struct lglock *lg); void lg_global_unlock(struct lglock *lg); @@ -10735,9 +11773,10 @@ diff -Nur linux-4.1.26.orig/include/linux/lglock.h linux-4.1.26/include/linux/lg #else /* When !CONFIG_SMP, map lglock to spinlock */ #define lglock spinlock -diff -Nur linux-4.1.26.orig/include/linux/list_bl.h linux-4.1.26/include/linux/list_bl.h ---- linux-4.1.26.orig/include/linux/list_bl.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/list_bl.h 2016-06-19 15:30:58.667296578 +0200 +diff --git a/include/linux/list_bl.h b/include/linux/list_bl.h +index 2eb88556c5c5..017d0f1c1eb4 100644 +--- a/include/linux/list_bl.h ++++ b/include/linux/list_bl.h @@ -2,6 +2,7 @@ #define _LINUX_LIST_BL_H @@ -10746,7 +11785,7 @@ diff -Nur linux-4.1.26.orig/include/linux/list_bl.h linux-4.1.26/include/linux/l #include <linux/bit_spinlock.h> /* -@@ -32,13 +33,22 @@ +@@ -32,13 +33,24 @@ struct hlist_bl_head { struct hlist_bl_node *first; @@ -10761,17 +11800,19 @@ diff -Nur linux-4.1.26.orig/include/linux/list_bl.h linux-4.1.26/include/linux/l -#define INIT_HLIST_BL_HEAD(ptr) \ - ((ptr)->first = NULL) + -+static inline void INIT_HLIST_BL_HEAD(struct hlist_bl_head *h) -+{ -+ h->first = NULL; +#ifdef CONFIG_PREEMPT_RT_BASE -+ raw_spin_lock_init(&h->lock); ++#define INIT_HLIST_BL_HEAD(h) \ ++do { \ ++ (h)->first = NULL; \ ++ raw_spin_lock_init(&(h)->lock); \ ++} while (0) ++#else ++#define INIT_HLIST_BL_HEAD(h) (h)->first = NULL +#endif -+} static inline void INIT_HLIST_BL_NODE(struct hlist_bl_node *h) { -@@ -117,12 +127,26 @@ +@@ -117,12 +129,26 @@ static inline void hlist_bl_del_init(struct hlist_bl_node *n) static inline void hlist_bl_lock(struct hlist_bl_head *b) { @@ -10798,10 +11839,12 @@ diff -Nur linux-4.1.26.orig/include/linux/list_bl.h linux-4.1.26/include/linux/l } static inline bool hlist_bl_is_locked(struct hlist_bl_head *b) -diff -Nur linux-4.1.26.orig/include/linux/locallock.h linux-4.1.26/include/linux/locallock.h ---- linux-4.1.26.orig/include/linux/locallock.h 1970-01-01 01:00:00.000000000 +0100 -+++ linux-4.1.26/include/linux/locallock.h 2016-06-19 15:30:58.667296578 +0200 -@@ -0,0 +1,270 @@ +diff --git a/include/linux/locallock.h b/include/linux/locallock.h +new file mode 100644 +index 000000000000..0edbf192f6d1 +--- /dev/null ++++ b/include/linux/locallock.h +@@ -0,0 +1,276 @@ +#ifndef _LINUX_LOCALLOCK_H +#define _LINUX_LOCALLOCK_H + @@ -10870,6 +11913,9 @@ diff -Nur linux-4.1.26.orig/include/linux/locallock.h linux-4.1.26/include/linux +#define local_lock(lvar) \ + do { __local_lock(&get_local_var(lvar)); } while (0) + ++#define local_lock_on(lvar, cpu) \ ++ do { __local_lock(&per_cpu(lvar, cpu)); } while (0) ++ +static inline int __local_trylock(struct local_irq_lock *lv) +{ + if (lv->owner != current && spin_trylock_local(&lv->lock)) { @@ -10908,6 +11954,9 @@ diff -Nur linux-4.1.26.orig/include/linux/locallock.h linux-4.1.26/include/linux + put_local_var(lvar); \ + } while (0) + ++#define local_unlock_on(lvar, cpu) \ ++ do { __local_unlock(&per_cpu(lvar, cpu)); } while (0) ++ +static inline void __local_lock_irq(struct local_irq_lock *lv) +{ + spin_lock_irqsave(&lv->lock, lv->flags); @@ -11072,9 +12121,10 @@ diff -Nur linux-4.1.26.orig/include/linux/locallock.h linux-4.1.26/include/linux +#endif + +#endif -diff -Nur linux-4.1.26.orig/include/linux/mm_types.h linux-4.1.26/include/linux/mm_types.h ---- linux-4.1.26.orig/include/linux/mm_types.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/mm_types.h 2016-06-19 15:30:58.667296578 +0200 +diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h +index c0c6b33535fb..89c047144b1f 100644 +--- a/include/linux/mm_types.h ++++ b/include/linux/mm_types.h @@ -11,6 +11,7 @@ #include <linux/completion.h> #include <linux/cpumask.h> @@ -11083,7 +12133,7 @@ diff -Nur linux-4.1.26.orig/include/linux/mm_types.h linux-4.1.26/include/linux/ #include <linux/page-flags-layout.h> #include <asm/page.h> #include <asm/mmu.h> -@@ -453,6 +454,9 @@ +@@ -453,6 +454,9 @@ struct mm_struct { bool tlb_flush_pending; #endif struct uprobes_state uprobes_state; @@ -11093,9 +12143,10 @@ diff -Nur linux-4.1.26.orig/include/linux/mm_types.h linux-4.1.26/include/linux/ #ifdef CONFIG_X86_INTEL_MPX /* address of the bounds directory */ void __user *bd_addr; -diff -Nur linux-4.1.26.orig/include/linux/mutex.h linux-4.1.26/include/linux/mutex.h ---- linux-4.1.26.orig/include/linux/mutex.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/mutex.h 2016-06-19 15:30:58.671296732 +0200 +diff --git a/include/linux/mutex.h b/include/linux/mutex.h +index 2cb7531e7d7a..b3fdfc820216 100644 +--- a/include/linux/mutex.h ++++ b/include/linux/mutex.h @@ -19,6 +19,17 @@ #include <asm/processor.h> #include <linux/osq_lock.h> @@ -11114,7 +12165,7 @@ diff -Nur linux-4.1.26.orig/include/linux/mutex.h linux-4.1.26/include/linux/mut /* * Simple, straightforward mutexes with strict semantics: * -@@ -99,13 +110,6 @@ +@@ -99,13 +110,6 @@ do { \ static inline void mutex_destroy(struct mutex *lock) {} #endif @@ -11128,7 +12179,7 @@ diff -Nur linux-4.1.26.orig/include/linux/mutex.h linux-4.1.26/include/linux/mut #define __MUTEX_INITIALIZER(lockname) \ { .count = ATOMIC_INIT(1) \ , .wait_lock = __SPIN_LOCK_UNLOCKED(lockname.wait_lock) \ -@@ -173,6 +177,8 @@ +@@ -173,6 +177,8 @@ extern int __must_check mutex_lock_killable(struct mutex *lock); extern int mutex_trylock(struct mutex *lock); extern void mutex_unlock(struct mutex *lock); @@ -11137,9 +12188,11 @@ diff -Nur linux-4.1.26.orig/include/linux/mutex.h linux-4.1.26/include/linux/mut extern int atomic_dec_and_mutex_lock(atomic_t *cnt, struct mutex *lock); #endif /* __LINUX_MUTEX_H */ -diff -Nur linux-4.1.26.orig/include/linux/mutex_rt.h linux-4.1.26/include/linux/mutex_rt.h ---- linux-4.1.26.orig/include/linux/mutex_rt.h 1970-01-01 01:00:00.000000000 +0100 -+++ linux-4.1.26/include/linux/mutex_rt.h 2016-06-19 15:30:58.671296732 +0200 +diff --git a/include/linux/mutex_rt.h b/include/linux/mutex_rt.h +new file mode 100644 +index 000000000000..c38a44b14da5 +--- /dev/null ++++ b/include/linux/mutex_rt.h @@ -0,0 +1,84 @@ +#ifndef __LINUX_MUTEX_RT_H +#define __LINUX_MUTEX_RT_H @@ -11225,10 +12278,11 @@ diff -Nur linux-4.1.26.orig/include/linux/mutex_rt.h linux-4.1.26/include/linux/ +} while (0) + +#endif -diff -Nur linux-4.1.26.orig/include/linux/netdevice.h linux-4.1.26/include/linux/netdevice.h ---- linux-4.1.26.orig/include/linux/netdevice.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/netdevice.h 2016-06-19 15:30:58.671296732 +0200 -@@ -2192,11 +2192,20 @@ +diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h +index 6c86c7edafa7..27b25e97c3d4 100644 +--- a/include/linux/netdevice.h ++++ b/include/linux/netdevice.h +@@ -2193,11 +2193,20 @@ void netdev_freemem(struct net_device *dev); void synchronize_net(void); int init_dummy_netdev(struct net_device *dev); @@ -11249,7 +12303,7 @@ diff -Nur linux-4.1.26.orig/include/linux/netdevice.h linux-4.1.26/include/linux struct net_device *dev_get_by_index(struct net *net, int ifindex); struct net_device *__dev_get_by_index(struct net *net, int ifindex); -@@ -2469,6 +2478,7 @@ +@@ -2488,6 +2497,7 @@ struct softnet_data { unsigned int dropped; struct sk_buff_head input_pkt_queue; struct napi_struct backlog; @@ -11257,9 +12311,10 @@ diff -Nur linux-4.1.26.orig/include/linux/netdevice.h linux-4.1.26/include/linux }; -diff -Nur linux-4.1.26.orig/include/linux/netfilter/x_tables.h linux-4.1.26/include/linux/netfilter/x_tables.h ---- linux-4.1.26.orig/include/linux/netfilter/x_tables.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/netfilter/x_tables.h 2016-06-19 15:30:58.671296732 +0200 +diff --git a/include/linux/netfilter/x_tables.h b/include/linux/netfilter/x_tables.h +index cc615e273f80..1a6ba6d7ff8b 100644 +--- a/include/linux/netfilter/x_tables.h ++++ b/include/linux/netfilter/x_tables.h @@ -3,6 +3,7 @@ @@ -11268,7 +12323,7 @@ diff -Nur linux-4.1.26.orig/include/linux/netfilter/x_tables.h linux-4.1.26/incl #include <uapi/linux/netfilter/x_tables.h> /** -@@ -282,6 +283,8 @@ +@@ -293,6 +294,8 @@ void xt_free_table_info(struct xt_table_info *info); */ DECLARE_PER_CPU(seqcount_t, xt_recseq); @@ -11277,7 +12332,7 @@ diff -Nur linux-4.1.26.orig/include/linux/netfilter/x_tables.h linux-4.1.26/incl /** * xt_write_recseq_begin - start of a write section * -@@ -296,6 +299,9 @@ +@@ -307,6 +310,9 @@ static inline unsigned int xt_write_recseq_begin(void) { unsigned int addend; @@ -11287,7 +12342,7 @@ diff -Nur linux-4.1.26.orig/include/linux/netfilter/x_tables.h linux-4.1.26/incl /* * Low order bit of sequence is set if we already * called xt_write_recseq_begin(). -@@ -326,6 +332,7 @@ +@@ -337,6 +343,7 @@ static inline void xt_write_recseq_end(unsigned int addend) /* this is kind of a write_seqcount_end(), but addend is 0 or 1 */ smp_wmb(); __this_cpu_add(xt_recseq.sequence, addend); @@ -11295,9 +12350,10 @@ diff -Nur linux-4.1.26.orig/include/linux/netfilter/x_tables.h linux-4.1.26/incl } /* -diff -Nur linux-4.1.26.orig/include/linux/notifier.h linux-4.1.26/include/linux/notifier.h ---- linux-4.1.26.orig/include/linux/notifier.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/notifier.h 2016-06-19 15:30:58.671296732 +0200 +diff --git a/include/linux/notifier.h b/include/linux/notifier.h +index d14a4c362465..2e4414a0c1c4 100644 +--- a/include/linux/notifier.h ++++ b/include/linux/notifier.h @@ -6,7 +6,7 @@ * * Alan Cox <Alan.Cox@linux.org> @@ -11318,7 +12374,7 @@ diff -Nur linux-4.1.26.orig/include/linux/notifier.h linux-4.1.26/include/linux/ */ typedef int (*notifier_fn_t)(struct notifier_block *nb, -@@ -88,7 +86,7 @@ +@@ -88,7 +86,7 @@ struct srcu_notifier_head { (name)->head = NULL; \ } while (0) @@ -11327,7 +12383,7 @@ diff -Nur linux-4.1.26.orig/include/linux/notifier.h linux-4.1.26/include/linux/ extern void srcu_init_notifier_head(struct srcu_notifier_head *nh); #define srcu_cleanup_notifier_head(name) \ cleanup_srcu_struct(&(name)->srcu); -@@ -101,7 +99,13 @@ +@@ -101,7 +99,13 @@ extern void srcu_init_notifier_head(struct srcu_notifier_head *nh); .head = NULL } #define RAW_NOTIFIER_INIT(name) { \ .head = NULL } @@ -11342,7 +12398,7 @@ diff -Nur linux-4.1.26.orig/include/linux/notifier.h linux-4.1.26/include/linux/ #define ATOMIC_NOTIFIER_HEAD(name) \ struct atomic_notifier_head name = \ -@@ -113,6 +117,18 @@ +@@ -113,6 +117,18 @@ extern void srcu_init_notifier_head(struct srcu_notifier_head *nh); struct raw_notifier_head name = \ RAW_NOTIFIER_INIT(name) @@ -11361,7 +12417,7 @@ diff -Nur linux-4.1.26.orig/include/linux/notifier.h linux-4.1.26/include/linux/ #ifdef __KERNEL__ extern int atomic_notifier_chain_register(struct atomic_notifier_head *nh, -@@ -182,12 +198,12 @@ +@@ -182,12 +198,12 @@ static inline int notifier_to_errno(int ret) /* * Declared notifiers so far. I can imagine quite a few more chains @@ -11377,9 +12433,10 @@ diff -Nur linux-4.1.26.orig/include/linux/notifier.h linux-4.1.26/include/linux/ /* CPU notfiers are defined in include/linux/cpu.h. */ /* netdevice notifiers are defined in include/linux/netdevice.h */ -diff -Nur linux-4.1.26.orig/include/linux/percpu.h linux-4.1.26/include/linux/percpu.h ---- linux-4.1.26.orig/include/linux/percpu.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/percpu.h 2016-06-19 15:30:58.671296732 +0200 +diff --git a/include/linux/percpu.h b/include/linux/percpu.h +index caebf2a758dc..53a60a51c758 100644 +--- a/include/linux/percpu.h ++++ b/include/linux/percpu.h @@ -24,6 +24,35 @@ PERCPU_MODULE_RESERVE) #endif @@ -11416,9 +12473,10 @@ diff -Nur linux-4.1.26.orig/include/linux/percpu.h linux-4.1.26/include/linux/pe /* minimum unit size, also is the maximum supported allocation size */ #define PCPU_MIN_UNIT_SIZE PFN_ALIGN(32 << 10) -diff -Nur linux-4.1.26.orig/include/linux/pid.h linux-4.1.26/include/linux/pid.h ---- linux-4.1.26.orig/include/linux/pid.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/pid.h 2016-06-19 15:30:58.671296732 +0200 +diff --git a/include/linux/pid.h b/include/linux/pid.h +index 23705a53abba..2cc64b779f03 100644 +--- a/include/linux/pid.h ++++ b/include/linux/pid.h @@ -2,6 +2,7 @@ #define _LINUX_PID_H @@ -11427,10 +12485,11 @@ diff -Nur linux-4.1.26.orig/include/linux/pid.h linux-4.1.26/include/linux/pid.h enum pid_type { -diff -Nur linux-4.1.26.orig/include/linux/platform_data/gpio-omap.h linux-4.1.26/include/linux/platform_data/gpio-omap.h ---- linux-4.1.26.orig/include/linux/platform_data/gpio-omap.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/platform_data/gpio-omap.h 2016-06-19 15:30:58.671296732 +0200 -@@ -198,7 +198,6 @@ +diff --git a/include/linux/platform_data/gpio-omap.h b/include/linux/platform_data/gpio-omap.h +index 5d50b25a73d7..ff43e01b8ca9 100644 +--- a/include/linux/platform_data/gpio-omap.h ++++ b/include/linux/platform_data/gpio-omap.h +@@ -198,7 +198,6 @@ struct omap_gpio_platform_data { int bank_width; /* GPIO bank width */ int bank_stride; /* Only needed for omap1 MPUIO */ bool dbck_flag; /* dbck required or not - True for OMAP3&4 */ @@ -11438,7 +12497,7 @@ diff -Nur linux-4.1.26.orig/include/linux/platform_data/gpio-omap.h linux-4.1.26 bool is_mpuio; /* whether the bank is of type MPUIO */ u32 non_wakeup_gpios; -@@ -208,9 +207,17 @@ +@@ -208,9 +207,17 @@ struct omap_gpio_platform_data { int (*get_context_loss_count)(struct device *dev); }; @@ -11458,10 +12517,11 @@ diff -Nur linux-4.1.26.orig/include/linux/platform_data/gpio-omap.h linux-4.1.26 +#endif #endif -diff -Nur linux-4.1.26.orig/include/linux/preempt.h linux-4.1.26/include/linux/preempt.h ---- linux-4.1.26.orig/include/linux/preempt.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/preempt.h 2016-06-19 15:30:58.671296732 +0200 -@@ -34,6 +34,20 @@ +diff --git a/include/linux/preempt.h b/include/linux/preempt.h +index 8cd6725c5758..8fa1d21dab70 100644 +--- a/include/linux/preempt.h ++++ b/include/linux/preempt.h +@@ -34,6 +34,20 @@ extern void preempt_count_sub(int val); #define preempt_count_inc() preempt_count_add(1) #define preempt_count_dec() preempt_count_sub(1) @@ -11482,7 +12542,7 @@ diff -Nur linux-4.1.26.orig/include/linux/preempt.h linux-4.1.26/include/linux/p #ifdef CONFIG_PREEMPT_COUNT #define preempt_disable() \ -@@ -42,13 +56,25 @@ +@@ -42,13 +56,25 @@ do { \ barrier(); \ } while (0) @@ -11509,7 +12569,7 @@ diff -Nur linux-4.1.26.orig/include/linux/preempt.h linux-4.1.26/include/linux/p #ifdef CONFIG_PREEMPT #define preempt_enable() \ -@@ -64,6 +90,13 @@ +@@ -64,6 +90,13 @@ do { \ __preempt_schedule(); \ } while (0) @@ -11523,7 +12583,7 @@ diff -Nur linux-4.1.26.orig/include/linux/preempt.h linux-4.1.26/include/linux/p #else #define preempt_enable() \ do { \ -@@ -122,6 +155,7 @@ +@@ -122,6 +155,7 @@ do { \ #define preempt_disable_notrace() barrier() #define preempt_enable_no_resched_notrace() barrier() #define preempt_enable_notrace() barrier() @@ -11531,7 +12591,7 @@ diff -Nur linux-4.1.26.orig/include/linux/preempt.h linux-4.1.26/include/linux/p #endif /* CONFIG_PREEMPT_COUNT */ -@@ -141,10 +175,31 @@ +@@ -141,10 +175,31 @@ do { \ } while (0) #define preempt_fold_need_resched() \ do { \ @@ -11564,9 +12624,10 @@ diff -Nur linux-4.1.26.orig/include/linux/preempt.h linux-4.1.26/include/linux/p #ifdef CONFIG_PREEMPT_NOTIFIERS struct preempt_notifier; -diff -Nur linux-4.1.26.orig/include/linux/preempt_mask.h linux-4.1.26/include/linux/preempt_mask.h ---- linux-4.1.26.orig/include/linux/preempt_mask.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/preempt_mask.h 2016-06-19 15:30:58.671296732 +0200 +diff --git a/include/linux/preempt_mask.h b/include/linux/preempt_mask.h +index 5cb25f17331a..26a33802dae2 100644 +--- a/include/linux/preempt_mask.h ++++ b/include/linux/preempt_mask.h @@ -44,16 +44,26 @@ #define HARDIRQ_OFFSET (1UL << HARDIRQ_SHIFT) #define NMI_OFFSET (1UL << NMI_SHIFT) @@ -11616,10 +12677,11 @@ diff -Nur linux-4.1.26.orig/include/linux/preempt_mask.h linux-4.1.26/include/li /* * The preempt_count offset needed for things like: -diff -Nur linux-4.1.26.orig/include/linux/printk.h linux-4.1.26/include/linux/printk.h ---- linux-4.1.26.orig/include/linux/printk.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/printk.h 2016-06-19 15:30:58.671296732 +0200 -@@ -115,9 +115,11 @@ +diff --git a/include/linux/printk.h b/include/linux/printk.h +index 9b30871c9149..08d0a7574fcf 100644 +--- a/include/linux/printk.h ++++ b/include/linux/printk.h +@@ -115,9 +115,11 @@ int no_printk(const char *fmt, ...) #ifdef CONFIG_EARLY_PRINTK extern asmlinkage __printf(1, 2) void early_printk(const char *fmt, ...); @@ -11631,10 +12693,11 @@ diff -Nur linux-4.1.26.orig/include/linux/printk.h linux-4.1.26/include/linux/pr #endif typedef int(*printk_func_t)(const char *fmt, va_list args); -diff -Nur linux-4.1.26.orig/include/linux/radix-tree.h linux-4.1.26/include/linux/radix-tree.h ---- linux-4.1.26.orig/include/linux/radix-tree.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/radix-tree.h 2016-06-19 15:30:58.671296732 +0200 -@@ -277,8 +277,13 @@ +diff --git a/include/linux/radix-tree.h b/include/linux/radix-tree.h +index 673dee29a9b9..9a80663a1574 100644 +--- a/include/linux/radix-tree.h ++++ b/include/linux/radix-tree.h +@@ -277,8 +277,13 @@ radix_tree_gang_lookup(struct radix_tree_root *root, void **results, unsigned int radix_tree_gang_lookup_slot(struct radix_tree_root *root, void ***results, unsigned long *indices, unsigned long first_index, unsigned int max_items); @@ -11648,7 +12711,7 @@ diff -Nur linux-4.1.26.orig/include/linux/radix-tree.h linux-4.1.26/include/linu void radix_tree_init(void); void *radix_tree_tag_set(struct radix_tree_root *root, unsigned long index, unsigned int tag); -@@ -303,7 +308,7 @@ +@@ -303,7 +308,7 @@ unsigned long radix_tree_locate_item(struct radix_tree_root *root, void *item); static inline void radix_tree_preload_end(void) { @@ -11657,9 +12720,10 @@ diff -Nur linux-4.1.26.orig/include/linux/radix-tree.h linux-4.1.26/include/linu } /** -diff -Nur linux-4.1.26.orig/include/linux/random.h linux-4.1.26/include/linux/random.h ---- linux-4.1.26.orig/include/linux/random.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/random.h 2016-06-19 15:30:58.671296732 +0200 +diff --git a/include/linux/random.h b/include/linux/random.h +index b05856e16b75..4a64ad52dcb7 100644 +--- a/include/linux/random.h ++++ b/include/linux/random.h @@ -11,7 +11,7 @@ extern void add_device_randomness(const void *, unsigned int); extern void add_input_randomness(unsigned int type, unsigned int code, @@ -11669,10 +12733,11 @@ diff -Nur linux-4.1.26.orig/include/linux/random.h linux-4.1.26/include/linux/ra extern void get_random_bytes(void *buf, int nbytes); extern void get_random_bytes_arch(void *buf, int nbytes); -diff -Nur linux-4.1.26.orig/include/linux/rcupdate.h linux-4.1.26/include/linux/rcupdate.h ---- linux-4.1.26.orig/include/linux/rcupdate.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/rcupdate.h 2016-06-19 15:30:58.671296732 +0200 -@@ -167,6 +167,9 @@ +diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h +index 573a5afd5ed8..5d090cdaaace 100644 +--- a/include/linux/rcupdate.h ++++ b/include/linux/rcupdate.h +@@ -167,6 +167,9 @@ void call_rcu(struct rcu_head *head, #endif /* #else #ifdef CONFIG_PREEMPT_RCU */ @@ -11682,7 +12747,7 @@ diff -Nur linux-4.1.26.orig/include/linux/rcupdate.h linux-4.1.26/include/linux/ /** * call_rcu_bh() - Queue an RCU for invocation after a quicker grace period. * @head: structure to be used for queueing the RCU updates. -@@ -190,6 +193,7 @@ +@@ -190,6 +193,7 @@ void call_rcu(struct rcu_head *head, */ void call_rcu_bh(struct rcu_head *head, void (*func)(struct rcu_head *head)); @@ -11690,7 +12755,7 @@ diff -Nur linux-4.1.26.orig/include/linux/rcupdate.h linux-4.1.26/include/linux/ /** * call_rcu_sched() - Queue an RCU for invocation after sched grace period. -@@ -260,6 +264,11 @@ +@@ -260,6 +264,11 @@ void synchronize_rcu(void); * types of kernel builds, the rcu_read_lock() nesting depth is unknowable. */ #define rcu_preempt_depth() (current->rcu_read_lock_nesting) @@ -11702,7 +12767,7 @@ diff -Nur linux-4.1.26.orig/include/linux/rcupdate.h linux-4.1.26/include/linux/ #else /* #ifdef CONFIG_PREEMPT_RCU */ -@@ -283,6 +292,8 @@ +@@ -283,6 +292,8 @@ static inline int rcu_preempt_depth(void) return 0; } @@ -11711,7 +12776,7 @@ diff -Nur linux-4.1.26.orig/include/linux/rcupdate.h linux-4.1.26/include/linux/ #endif /* #else #ifdef CONFIG_PREEMPT_RCU */ /* Internal to kernel */ -@@ -463,7 +474,14 @@ +@@ -463,7 +474,14 @@ extern struct lockdep_map rcu_callback_map; int debug_lockdep_rcu_enabled(void); int rcu_read_lock_held(void); @@ -11726,7 +12791,7 @@ diff -Nur linux-4.1.26.orig/include/linux/rcupdate.h linux-4.1.26/include/linux/ /** * rcu_read_lock_sched_held() - might we be in RCU-sched read-side critical section? -@@ -990,10 +1008,14 @@ +@@ -990,10 +1008,14 @@ static inline void rcu_read_unlock(void) static inline void rcu_read_lock_bh(void) { local_bh_disable(); @@ -11741,7 +12806,7 @@ diff -Nur linux-4.1.26.orig/include/linux/rcupdate.h linux-4.1.26/include/linux/ } /* -@@ -1003,10 +1025,14 @@ +@@ -1003,10 +1025,14 @@ static inline void rcu_read_lock_bh(void) */ static inline void rcu_read_unlock_bh(void) { @@ -11756,10 +12821,11 @@ diff -Nur linux-4.1.26.orig/include/linux/rcupdate.h linux-4.1.26/include/linux/ local_bh_enable(); } -diff -Nur linux-4.1.26.orig/include/linux/rcutree.h linux-4.1.26/include/linux/rcutree.h ---- linux-4.1.26.orig/include/linux/rcutree.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/rcutree.h 2016-06-19 15:30:58.671296732 +0200 -@@ -46,7 +46,11 @@ +diff --git a/include/linux/rcutree.h b/include/linux/rcutree.h +index d2e583a6aaca..0b350893b46a 100644 +--- a/include/linux/rcutree.h ++++ b/include/linux/rcutree.h +@@ -46,7 +46,11 @@ static inline void rcu_virt_note_context_switch(int cpu) rcu_note_context_switch(); } @@ -11771,7 +12837,7 @@ diff -Nur linux-4.1.26.orig/include/linux/rcutree.h linux-4.1.26/include/linux/r void synchronize_sched_expedited(void); void synchronize_rcu_expedited(void); -@@ -74,7 +78,11 @@ +@@ -74,7 +78,11 @@ static inline void synchronize_rcu_bh_expedited(void) } void rcu_barrier(void); @@ -11783,7 +12849,7 @@ diff -Nur linux-4.1.26.orig/include/linux/rcutree.h linux-4.1.26/include/linux/r void rcu_barrier_sched(void); unsigned long get_state_synchronize_rcu(void); void cond_synchronize_rcu(unsigned long oldstate); -@@ -85,12 +93,10 @@ +@@ -85,12 +93,10 @@ unsigned long rcu_batches_started(void); unsigned long rcu_batches_started_bh(void); unsigned long rcu_batches_started_sched(void); unsigned long rcu_batches_completed(void); @@ -11796,7 +12862,7 @@ diff -Nur linux-4.1.26.orig/include/linux/rcutree.h linux-4.1.26/include/linux/r void rcu_sched_force_quiescent_state(void); void exit_rcu(void); -@@ -100,6 +106,14 @@ +@@ -100,6 +106,14 @@ extern int rcu_scheduler_active __read_mostly; bool rcu_is_watching(void); @@ -11811,9 +12877,10 @@ diff -Nur linux-4.1.26.orig/include/linux/rcutree.h linux-4.1.26/include/linux/r void rcu_all_qs(void); #endif /* __LINUX_RCUTREE_H */ -diff -Nur linux-4.1.26.orig/include/linux/rtmutex.h linux-4.1.26/include/linux/rtmutex.h ---- linux-4.1.26.orig/include/linux/rtmutex.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/rtmutex.h 2016-06-19 15:30:58.675296887 +0200 +diff --git a/include/linux/rtmutex.h b/include/linux/rtmutex.h +index 1abba5ce2a2f..d5a04ea47a13 100644 +--- a/include/linux/rtmutex.h ++++ b/include/linux/rtmutex.h @@ -14,10 +14,14 @@ #include <linux/linkage.h> @@ -11830,7 +12897,7 @@ diff -Nur linux-4.1.26.orig/include/linux/rtmutex.h linux-4.1.26/include/linux/r /** * The rt_mutex structure * -@@ -31,8 +35,8 @@ +@@ -31,8 +35,8 @@ struct rt_mutex { struct rb_root waiters; struct rb_node *waiters_leftmost; struct task_struct *owner; @@ -11840,7 +12907,7 @@ diff -Nur linux-4.1.26.orig/include/linux/rtmutex.h linux-4.1.26/include/linux/r const char *name, *file; int line; void *magic; -@@ -55,22 +59,33 @@ +@@ -55,22 +59,33 @@ struct hrtimer_sleeper; # define rt_mutex_debug_check_no_locks_held(task) do { } while (0) #endif @@ -11879,7 +12946,7 @@ diff -Nur linux-4.1.26.orig/include/linux/rtmutex.h linux-4.1.26/include/linux/r #define DEFINE_RT_MUTEX(mutexname) \ struct rt_mutex mutexname = __RT_MUTEX_INITIALIZER(mutexname) -@@ -91,6 +106,7 @@ +@@ -91,6 +106,7 @@ extern void rt_mutex_destroy(struct rt_mutex *lock); extern void rt_mutex_lock(struct rt_mutex *lock); extern int rt_mutex_lock_interruptible(struct rt_mutex *lock); @@ -11887,9 +12954,11 @@ diff -Nur linux-4.1.26.orig/include/linux/rtmutex.h linux-4.1.26/include/linux/r extern int rt_mutex_timed_lock(struct rt_mutex *lock, struct hrtimer_sleeper *timeout); -diff -Nur linux-4.1.26.orig/include/linux/rwlock_rt.h linux-4.1.26/include/linux/rwlock_rt.h ---- linux-4.1.26.orig/include/linux/rwlock_rt.h 1970-01-01 01:00:00.000000000 +0100 -+++ linux-4.1.26/include/linux/rwlock_rt.h 2016-06-19 15:30:58.675296887 +0200 +diff --git a/include/linux/rwlock_rt.h b/include/linux/rwlock_rt.h +new file mode 100644 +index 000000000000..49ed2d45d3be +--- /dev/null ++++ b/include/linux/rwlock_rt.h @@ -0,0 +1,99 @@ +#ifndef __LINUX_RWLOCK_RT_H +#define __LINUX_RWLOCK_RT_H @@ -11990,9 +13059,10 @@ diff -Nur linux-4.1.26.orig/include/linux/rwlock_rt.h linux-4.1.26/include/linux + } while (0) + +#endif -diff -Nur linux-4.1.26.orig/include/linux/rwlock_types.h linux-4.1.26/include/linux/rwlock_types.h ---- linux-4.1.26.orig/include/linux/rwlock_types.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/rwlock_types.h 2016-06-19 15:30:58.675296887 +0200 +diff --git a/include/linux/rwlock_types.h b/include/linux/rwlock_types.h +index cc0072e93e36..d0da966ad7a0 100644 +--- a/include/linux/rwlock_types.h ++++ b/include/linux/rwlock_types.h @@ -1,6 +1,10 @@ #ifndef __LINUX_RWLOCK_TYPES_H #define __LINUX_RWLOCK_TYPES_H @@ -12004,7 +13074,7 @@ diff -Nur linux-4.1.26.orig/include/linux/rwlock_types.h linux-4.1.26/include/li /* * include/linux/rwlock_types.h - generic rwlock type definitions * and initializers -@@ -43,6 +47,7 @@ +@@ -43,6 +47,7 @@ typedef struct { RW_DEP_MAP_INIT(lockname) } #endif @@ -12013,9 +13083,11 @@ diff -Nur linux-4.1.26.orig/include/linux/rwlock_types.h linux-4.1.26/include/li + rwlock_t name __cacheline_aligned_in_smp = __RW_LOCK_UNLOCKED(name) #endif /* __LINUX_RWLOCK_TYPES_H */ -diff -Nur linux-4.1.26.orig/include/linux/rwlock_types_rt.h linux-4.1.26/include/linux/rwlock_types_rt.h ---- linux-4.1.26.orig/include/linux/rwlock_types_rt.h 1970-01-01 01:00:00.000000000 +0100 -+++ linux-4.1.26/include/linux/rwlock_types_rt.h 2016-06-19 15:30:58.675296887 +0200 +diff --git a/include/linux/rwlock_types_rt.h b/include/linux/rwlock_types_rt.h +new file mode 100644 +index 000000000000..b13832119591 +--- /dev/null ++++ b/include/linux/rwlock_types_rt.h @@ -0,0 +1,33 @@ +#ifndef __LINUX_RWLOCK_TYPES_RT_H +#define __LINUX_RWLOCK_TYPES_RT_H @@ -12050,9 +13122,10 @@ diff -Nur linux-4.1.26.orig/include/linux/rwlock_types_rt.h linux-4.1.26/include + rwlock_t name __cacheline_aligned_in_smp = __RW_LOCK_UNLOCKED(name) + +#endif -diff -Nur linux-4.1.26.orig/include/linux/rwsem.h linux-4.1.26/include/linux/rwsem.h ---- linux-4.1.26.orig/include/linux/rwsem.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/rwsem.h 2016-06-19 15:30:58.675296887 +0200 +diff --git a/include/linux/rwsem.h b/include/linux/rwsem.h +index 8f498cdde280..2b2148431f14 100644 +--- a/include/linux/rwsem.h ++++ b/include/linux/rwsem.h @@ -18,6 +18,10 @@ #include <linux/osq_lock.h> #endif @@ -12064,16 +13137,18 @@ diff -Nur linux-4.1.26.orig/include/linux/rwsem.h linux-4.1.26/include/linux/rws struct rw_semaphore; #ifdef CONFIG_RWSEM_GENERIC_SPINLOCK -@@ -177,4 +181,6 @@ +@@ -177,4 +181,6 @@ extern void up_read_non_owner(struct rw_semaphore *sem); # define up_read_non_owner(sem) up_read(sem) #endif +#endif /* !PREEMPT_RT_FULL */ + #endif /* _LINUX_RWSEM_H */ -diff -Nur linux-4.1.26.orig/include/linux/rwsem_rt.h linux-4.1.26/include/linux/rwsem_rt.h ---- linux-4.1.26.orig/include/linux/rwsem_rt.h 1970-01-01 01:00:00.000000000 +0100 -+++ linux-4.1.26/include/linux/rwsem_rt.h 2016-06-19 15:30:58.675296887 +0200 +diff --git a/include/linux/rwsem_rt.h b/include/linux/rwsem_rt.h +new file mode 100644 +index 000000000000..928a05cbf94f +--- /dev/null ++++ b/include/linux/rwsem_rt.h @@ -0,0 +1,140 @@ +#ifndef _LINUX_RWSEM_RT_H +#define _LINUX_RWSEM_RT_H @@ -12215,10 +13290,11 @@ diff -Nur linux-4.1.26.orig/include/linux/rwsem_rt.h linux-4.1.26/include/linux/ +} +#endif +#endif -diff -Nur linux-4.1.26.orig/include/linux/sched.h linux-4.1.26/include/linux/sched.h ---- linux-4.1.26.orig/include/linux/sched.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/sched.h 2016-06-19 15:30:58.675296887 +0200 -@@ -26,6 +26,7 @@ +diff --git a/include/linux/sched.h b/include/linux/sched.h +index 9e39deaeddd6..769f2cf30963 100644 +--- a/include/linux/sched.h ++++ b/include/linux/sched.h +@@ -26,6 +26,7 @@ struct sched_param { #include <linux/nodemask.h> #include <linux/mm_types.h> #include <linux/preempt_mask.h> @@ -12226,7 +13302,7 @@ diff -Nur linux-4.1.26.orig/include/linux/sched.h linux-4.1.26/include/linux/sch #include <asm/page.h> #include <asm/ptrace.h> -@@ -175,8 +176,6 @@ +@@ -175,8 +176,6 @@ extern void get_iowait_load(unsigned long *nr_waiters, unsigned long *load); extern void calc_global_load(unsigned long ticks); extern void update_cpu_load_nohz(void); @@ -12235,7 +13311,7 @@ diff -Nur linux-4.1.26.orig/include/linux/sched.h linux-4.1.26/include/linux/sch extern void dump_cpu_task(int cpu); struct seq_file; -@@ -234,10 +233,7 @@ +@@ -234,10 +233,7 @@ extern char ___assert_task_state[1 - 2*!!( TASK_UNINTERRUPTIBLE | __TASK_STOPPED | \ __TASK_TRACED | EXIT_ZOMBIE | EXIT_DEAD) @@ -12246,7 +13322,7 @@ diff -Nur linux-4.1.26.orig/include/linux/sched.h linux-4.1.26/include/linux/sch #define task_contributes_to_load(task) \ ((task->state & TASK_UNINTERRUPTIBLE) != 0 && \ (task->flags & PF_FROZEN) == 0) -@@ -302,6 +298,11 @@ +@@ -302,6 +298,11 @@ extern char ___assert_task_state[1 - 2*!!( #endif @@ -12258,7 +13334,7 @@ diff -Nur linux-4.1.26.orig/include/linux/sched.h linux-4.1.26/include/linux/sch /* Task command name length */ #define TASK_COMM_LEN 16 -@@ -901,6 +902,50 @@ +@@ -902,6 +903,50 @@ enum cpu_idle_type { #define SCHED_CAPACITY_SCALE (1L << SCHED_CAPACITY_SHIFT) /* @@ -12309,7 +13385,7 @@ diff -Nur linux-4.1.26.orig/include/linux/sched.h linux-4.1.26/include/linux/sch * sched-domains (multiprocessor balancing) declarations: */ #ifdef CONFIG_SMP -@@ -1292,6 +1337,7 @@ +@@ -1293,6 +1338,7 @@ enum perf_event_task_context { struct task_struct { volatile long state; /* -1 unrunnable, 0 runnable, >0 stopped */ @@ -12317,7 +13393,7 @@ diff -Nur linux-4.1.26.orig/include/linux/sched.h linux-4.1.26/include/linux/sch void *stack; atomic_t usage; unsigned int flags; /* per process flags, defined below */ -@@ -1328,6 +1374,12 @@ +@@ -1329,6 +1375,12 @@ struct task_struct { #endif unsigned int policy; @@ -12330,7 +13406,7 @@ diff -Nur linux-4.1.26.orig/include/linux/sched.h linux-4.1.26/include/linux/sch int nr_cpus_allowed; cpumask_t cpus_allowed; -@@ -1435,7 +1487,8 @@ +@@ -1436,7 +1488,8 @@ struct task_struct { struct cputime prev_cputime; #endif #ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN @@ -12340,7 +13416,7 @@ diff -Nur linux-4.1.26.orig/include/linux/sched.h linux-4.1.26/include/linux/sch unsigned long long vtime_snap; enum { VTIME_SLEEPING = 0, -@@ -1451,6 +1504,9 @@ +@@ -1452,6 +1505,9 @@ struct task_struct { struct task_cputime cputime_expires; struct list_head cpu_timers[3]; @@ -12350,7 +13426,7 @@ diff -Nur linux-4.1.26.orig/include/linux/sched.h linux-4.1.26/include/linux/sch /* process credentials */ const struct cred __rcu *real_cred; /* objective and real subjective task -@@ -1483,10 +1539,15 @@ +@@ -1484,10 +1540,15 @@ struct task_struct { /* signal handlers */ struct signal_struct *signal; struct sighand_struct *sighand; @@ -12366,7 +13442,7 @@ diff -Nur linux-4.1.26.orig/include/linux/sched.h linux-4.1.26/include/linux/sch unsigned long sas_ss_sp; size_t sas_ss_size; -@@ -1512,6 +1573,8 @@ +@@ -1513,6 +1574,8 @@ struct task_struct { /* Protection of the PI data structures: */ raw_spinlock_t pi_lock; @@ -12375,7 +13451,7 @@ diff -Nur linux-4.1.26.orig/include/linux/sched.h linux-4.1.26/include/linux/sch #ifdef CONFIG_RT_MUTEXES /* PI waiters blocked on a rt_mutex held by this task */ struct rb_root pi_waiters; -@@ -1706,6 +1769,12 @@ +@@ -1707,6 +1770,12 @@ struct task_struct { unsigned long trace; /* bitmask and counter of trace recursion */ unsigned long trace_recursion; @@ -12388,7 +13464,7 @@ diff -Nur linux-4.1.26.orig/include/linux/sched.h linux-4.1.26/include/linux/sch #endif /* CONFIG_TRACING */ #ifdef CONFIG_MEMCG struct memcg_oom_info { -@@ -1722,14 +1791,26 @@ +@@ -1723,14 +1792,26 @@ struct task_struct { unsigned int sequential_io; unsigned int sequential_io_avg; #endif @@ -12418,7 +13494,7 @@ diff -Nur linux-4.1.26.orig/include/linux/sched.h linux-4.1.26/include/linux/sch #define TNF_MIGRATED 0x01 #define TNF_NO_GROUP 0x02 #define TNF_SHARED 0x04 -@@ -1918,6 +1999,15 @@ +@@ -1919,6 +2000,15 @@ extern struct pid *cad_pid; extern void free_task(struct task_struct *tsk); #define get_task_struct(tsk) do { atomic_inc(&(tsk)->usage); } while(0) @@ -12434,7 +13510,7 @@ diff -Nur linux-4.1.26.orig/include/linux/sched.h linux-4.1.26/include/linux/sch extern void __put_task_struct(struct task_struct *t); static inline void put_task_struct(struct task_struct *t) -@@ -1925,6 +2015,7 @@ +@@ -1926,6 +2016,7 @@ static inline void put_task_struct(struct task_struct *t) if (atomic_dec_and_test(&t->usage)) __put_task_struct(t); } @@ -12442,7 +13518,7 @@ diff -Nur linux-4.1.26.orig/include/linux/sched.h linux-4.1.26/include/linux/sch #ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN extern void task_cputime(struct task_struct *t, -@@ -1963,6 +2054,7 @@ +@@ -1964,6 +2055,7 @@ extern void thread_group_cputime_adjusted(struct task_struct *p, cputime_t *ut, /* * Per process flags */ @@ -12450,7 +13526,7 @@ diff -Nur linux-4.1.26.orig/include/linux/sched.h linux-4.1.26/include/linux/sch #define PF_EXITING 0x00000004 /* getting shut down */ #define PF_EXITPIDONE 0x00000008 /* pi exit done on shut down */ #define PF_VCPU 0x00000010 /* I'm a virtual CPU */ -@@ -2127,6 +2219,10 @@ +@@ -2128,6 +2220,10 @@ extern void do_set_cpus_allowed(struct task_struct *p, extern int set_cpus_allowed_ptr(struct task_struct *p, const struct cpumask *new_mask); @@ -12461,7 +13537,7 @@ diff -Nur linux-4.1.26.orig/include/linux/sched.h linux-4.1.26/include/linux/sch #else static inline void do_set_cpus_allowed(struct task_struct *p, const struct cpumask *new_mask) -@@ -2139,6 +2235,9 @@ +@@ -2140,6 +2236,9 @@ static inline int set_cpus_allowed_ptr(struct task_struct *p, return -EINVAL; return 0; } @@ -12471,7 +13547,7 @@ diff -Nur linux-4.1.26.orig/include/linux/sched.h linux-4.1.26/include/linux/sch #endif #ifdef CONFIG_NO_HZ_COMMON -@@ -2355,6 +2454,7 @@ +@@ -2356,6 +2455,7 @@ extern void xtime_update(unsigned long ticks); extern int wake_up_state(struct task_struct *tsk, unsigned int state); extern int wake_up_process(struct task_struct *tsk); @@ -12479,7 +13555,7 @@ diff -Nur linux-4.1.26.orig/include/linux/sched.h linux-4.1.26/include/linux/sch extern void wake_up_new_task(struct task_struct *tsk); #ifdef CONFIG_SMP extern void kick_process(struct task_struct *tsk); -@@ -2471,12 +2571,24 @@ +@@ -2472,12 +2572,24 @@ extern struct mm_struct * mm_alloc(void); /* mmdrop drops the mm and the page tables */ extern void __mmdrop(struct mm_struct *); @@ -12504,7 +13580,7 @@ diff -Nur linux-4.1.26.orig/include/linux/sched.h linux-4.1.26/include/linux/sch /* mmput gets rid of the mappings and all user-space */ extern void mmput(struct mm_struct *); /* Grab a reference to a task's mm, if it is not already going away */ -@@ -2788,6 +2900,43 @@ +@@ -2789,6 +2901,43 @@ static inline int test_tsk_need_resched(struct task_struct *tsk) return unlikely(test_tsk_thread_flag(tsk,TIF_NEED_RESCHED)); } @@ -12548,7 +13624,7 @@ diff -Nur linux-4.1.26.orig/include/linux/sched.h linux-4.1.26/include/linux/sch static inline int restart_syscall(void) { set_tsk_thread_flag(current, TIF_SIGPENDING); -@@ -2819,6 +2968,51 @@ +@@ -2820,6 +2969,51 @@ static inline int signal_pending_state(long state, struct task_struct *p) return (state & TASK_INTERRUPTIBLE) || __fatal_signal_pending(p); } @@ -12600,7 +13676,7 @@ diff -Nur linux-4.1.26.orig/include/linux/sched.h linux-4.1.26/include/linux/sch /* * cond_resched() and cond_resched_lock(): latency reduction via * explicit rescheduling in places that are safe. The return -@@ -2840,12 +3034,16 @@ +@@ -2841,12 +3035,16 @@ extern int __cond_resched_lock(spinlock_t *lock); __cond_resched_lock(lock); \ }) @@ -12617,7 +13693,7 @@ diff -Nur linux-4.1.26.orig/include/linux/sched.h linux-4.1.26/include/linux/sch static inline void cond_resched_rcu(void) { -@@ -3012,6 +3210,26 @@ +@@ -3013,6 +3211,26 @@ static inline void set_task_cpu(struct task_struct *p, unsigned int cpu) #endif /* CONFIG_SMP */ @@ -12644,10 +13720,11 @@ diff -Nur linux-4.1.26.orig/include/linux/sched.h linux-4.1.26/include/linux/sch extern long sched_setaffinity(pid_t pid, const struct cpumask *new_mask); extern long sched_getaffinity(pid_t pid, struct cpumask *mask); -diff -Nur linux-4.1.26.orig/include/linux/seqlock.h linux-4.1.26/include/linux/seqlock.h ---- linux-4.1.26.orig/include/linux/seqlock.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/seqlock.h 2016-06-19 15:30:58.675296887 +0200 -@@ -219,20 +219,30 @@ +diff --git a/include/linux/seqlock.h b/include/linux/seqlock.h +index c07e3a536099..381bf3999617 100644 +--- a/include/linux/seqlock.h ++++ b/include/linux/seqlock.h +@@ -219,20 +219,30 @@ static inline int read_seqcount_retry(const seqcount_t *s, unsigned start) return __read_seqcount_retry(s, start); } @@ -12682,7 +13759,7 @@ diff -Nur linux-4.1.26.orig/include/linux/seqlock.h linux-4.1.26/include/linux/s /* * raw_write_seqcount_latch - redirect readers to even/odd copy * @s: pointer to seqcount_t -@@ -305,10 +315,32 @@ +@@ -305,10 +315,32 @@ typedef struct { /* * Read side functions for starting and finalizing a read side section. */ @@ -12715,7 +13792,7 @@ diff -Nur linux-4.1.26.orig/include/linux/seqlock.h linux-4.1.26/include/linux/s static inline unsigned read_seqretry(const seqlock_t *sl, unsigned start) { -@@ -323,36 +355,36 @@ +@@ -323,36 +355,36 @@ static inline unsigned read_seqretry(const seqlock_t *sl, unsigned start) static inline void write_seqlock(seqlock_t *sl) { spin_lock(&sl->lock); @@ -12758,7 +13835,7 @@ diff -Nur linux-4.1.26.orig/include/linux/seqlock.h linux-4.1.26/include/linux/s spin_unlock_irq(&sl->lock); } -@@ -361,7 +393,7 @@ +@@ -361,7 +393,7 @@ static inline unsigned long __write_seqlock_irqsave(seqlock_t *sl) unsigned long flags; spin_lock_irqsave(&sl->lock, flags); @@ -12767,7 +13844,7 @@ diff -Nur linux-4.1.26.orig/include/linux/seqlock.h linux-4.1.26/include/linux/s return flags; } -@@ -371,7 +403,7 @@ +@@ -371,7 +403,7 @@ static inline unsigned long __write_seqlock_irqsave(seqlock_t *sl) static inline void write_sequnlock_irqrestore(seqlock_t *sl, unsigned long flags) { @@ -12776,10 +13853,11 @@ diff -Nur linux-4.1.26.orig/include/linux/seqlock.h linux-4.1.26/include/linux/s spin_unlock_irqrestore(&sl->lock, flags); } -diff -Nur linux-4.1.26.orig/include/linux/signal.h linux-4.1.26/include/linux/signal.h ---- linux-4.1.26.orig/include/linux/signal.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/signal.h 2016-06-19 15:30:58.675296887 +0200 -@@ -233,6 +233,7 @@ +diff --git a/include/linux/signal.h b/include/linux/signal.h +index 883ceb1439fa..6da98d067bad 100644 +--- a/include/linux/signal.h ++++ b/include/linux/signal.h +@@ -233,6 +233,7 @@ static inline void init_sigpending(struct sigpending *sig) } extern void flush_sigqueue(struct sigpending *queue); @@ -12787,10 +13865,11 @@ diff -Nur linux-4.1.26.orig/include/linux/signal.h linux-4.1.26/include/linux/si /* Test if 'sig' is valid signal. Use this instead of testing _NSIG directly */ static inline int valid_signal(unsigned long sig) -diff -Nur linux-4.1.26.orig/include/linux/skbuff.h linux-4.1.26/include/linux/skbuff.h ---- linux-4.1.26.orig/include/linux/skbuff.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/skbuff.h 2016-06-19 15:30:58.675296887 +0200 -@@ -187,6 +187,7 @@ +diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h +index ca2e26a486ee..ea41a11d3bc7 100644 +--- a/include/linux/skbuff.h ++++ b/include/linux/skbuff.h +@@ -187,6 +187,7 @@ struct sk_buff_head { __u32 qlen; spinlock_t lock; @@ -12798,7 +13877,7 @@ diff -Nur linux-4.1.26.orig/include/linux/skbuff.h linux-4.1.26/include/linux/sk }; struct sk_buff; -@@ -1337,6 +1338,12 @@ +@@ -1337,6 +1338,12 @@ static inline void skb_queue_head_init(struct sk_buff_head *list) __skb_queue_head_init(list); } @@ -12811,10 +13890,11 @@ diff -Nur linux-4.1.26.orig/include/linux/skbuff.h linux-4.1.26/include/linux/sk static inline void skb_queue_head_init_class(struct sk_buff_head *list, struct lock_class_key *class) { -diff -Nur linux-4.1.26.orig/include/linux/smp.h linux-4.1.26/include/linux/smp.h ---- linux-4.1.26.orig/include/linux/smp.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/smp.h 2016-06-19 15:30:58.675296887 +0200 -@@ -185,6 +185,9 @@ +diff --git a/include/linux/smp.h b/include/linux/smp.h +index c4414074bd88..e6ab36aeaaab 100644 +--- a/include/linux/smp.h ++++ b/include/linux/smp.h +@@ -185,6 +185,9 @@ static inline void smp_init(void) { } #define get_cpu() ({ preempt_disable(); smp_processor_id(); }) #define put_cpu() preempt_enable() @@ -12824,23 +13904,11 @@ diff -Nur linux-4.1.26.orig/include/linux/smp.h linux-4.1.26/include/linux/smp.h /* * Callback to arch code if there's nosmp or maxcpus=0 on the * boot command line: -diff -Nur linux-4.1.26.orig/include/linux/spinlock_api_smp.h linux-4.1.26/include/linux/spinlock_api_smp.h ---- linux-4.1.26.orig/include/linux/spinlock_api_smp.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/spinlock_api_smp.h 2016-06-19 15:30:58.679297041 +0200 -@@ -189,6 +189,8 @@ - return 0; - } - --#include <linux/rwlock_api_smp.h> -+#ifndef CONFIG_PREEMPT_RT_FULL -+# include <linux/rwlock_api_smp.h> -+#endif - - #endif /* __LINUX_SPINLOCK_API_SMP_H */ -diff -Nur linux-4.1.26.orig/include/linux/spinlock.h linux-4.1.26/include/linux/spinlock.h ---- linux-4.1.26.orig/include/linux/spinlock.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/spinlock.h 2016-06-19 15:30:58.679297041 +0200 -@@ -281,7 +281,11 @@ +diff --git a/include/linux/spinlock.h b/include/linux/spinlock.h +index 3e18379dfa6f..28f4366fd495 100644 +--- a/include/linux/spinlock.h ++++ b/include/linux/spinlock.h +@@ -281,7 +281,11 @@ static inline void do_raw_spin_unlock(raw_spinlock_t *lock) __releases(lock) #define raw_spin_can_lock(lock) (!raw_spin_is_locked(lock)) /* Include rwlock functions */ @@ -12853,7 +13921,7 @@ diff -Nur linux-4.1.26.orig/include/linux/spinlock.h linux-4.1.26/include/linux/ /* * Pull the _spin_*()/_read_*()/_write_*() functions/declarations: -@@ -292,6 +296,10 @@ +@@ -292,6 +296,10 @@ static inline void do_raw_spin_unlock(raw_spinlock_t *lock) __releases(lock) # include <linux/spinlock_api_up.h> #endif @@ -12864,16 +13932,32 @@ diff -Nur linux-4.1.26.orig/include/linux/spinlock.h linux-4.1.26/include/linux/ /* * Map the spin_lock functions to the raw variants for PREEMPT_RT=n */ -@@ -426,4 +434,6 @@ +@@ -426,4 +434,6 @@ extern int _atomic_dec_and_lock(atomic_t *atomic, spinlock_t *lock); #define atomic_dec_and_lock(atomic, lock) \ __cond_lock(lock, _atomic_dec_and_lock(atomic, lock)) +#endif /* !PREEMPT_RT_FULL */ + #endif /* __LINUX_SPINLOCK_H */ -diff -Nur linux-4.1.26.orig/include/linux/spinlock_rt.h linux-4.1.26/include/linux/spinlock_rt.h ---- linux-4.1.26.orig/include/linux/spinlock_rt.h 1970-01-01 01:00:00.000000000 +0100 -+++ linux-4.1.26/include/linux/spinlock_rt.h 2016-06-19 15:30:58.679297041 +0200 +diff --git a/include/linux/spinlock_api_smp.h b/include/linux/spinlock_api_smp.h +index 5344268e6e62..043263f30e81 100644 +--- a/include/linux/spinlock_api_smp.h ++++ b/include/linux/spinlock_api_smp.h +@@ -189,6 +189,8 @@ static inline int __raw_spin_trylock_bh(raw_spinlock_t *lock) + return 0; + } + +-#include <linux/rwlock_api_smp.h> ++#ifndef CONFIG_PREEMPT_RT_FULL ++# include <linux/rwlock_api_smp.h> ++#endif + + #endif /* __LINUX_SPINLOCK_API_SMP_H */ +diff --git a/include/linux/spinlock_rt.h b/include/linux/spinlock_rt.h +new file mode 100644 +index 000000000000..f757096b230c +--- /dev/null ++++ b/include/linux/spinlock_rt.h @@ -0,0 +1,174 @@ +#ifndef __LINUX_SPINLOCK_RT_H +#define __LINUX_SPINLOCK_RT_H @@ -13049,9 +14133,10 @@ diff -Nur linux-4.1.26.orig/include/linux/spinlock_rt.h linux-4.1.26/include/lin + atomic_dec_and_spin_lock(atomic, lock) + +#endif -diff -Nur linux-4.1.26.orig/include/linux/spinlock_types.h linux-4.1.26/include/linux/spinlock_types.h ---- linux-4.1.26.orig/include/linux/spinlock_types.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/spinlock_types.h 2016-06-19 15:30:58.679297041 +0200 +diff --git a/include/linux/spinlock_types.h b/include/linux/spinlock_types.h +index 73548eb13a5d..10bac715ea96 100644 +--- a/include/linux/spinlock_types.h ++++ b/include/linux/spinlock_types.h @@ -9,80 +9,15 @@ * Released under the General Public License (GPL). */ @@ -13140,9 +14225,11 @@ diff -Nur linux-4.1.26.orig/include/linux/spinlock_types.h linux-4.1.26/include/ -#include <linux/rwlock_types.h> - #endif /* __LINUX_SPINLOCK_TYPES_H */ -diff -Nur linux-4.1.26.orig/include/linux/spinlock_types_nort.h linux-4.1.26/include/linux/spinlock_types_nort.h ---- linux-4.1.26.orig/include/linux/spinlock_types_nort.h 1970-01-01 01:00:00.000000000 +0100 -+++ linux-4.1.26/include/linux/spinlock_types_nort.h 2016-06-19 15:30:58.679297041 +0200 +diff --git a/include/linux/spinlock_types_nort.h b/include/linux/spinlock_types_nort.h +new file mode 100644 +index 000000000000..f1dac1fb1d6a +--- /dev/null ++++ b/include/linux/spinlock_types_nort.h @@ -0,0 +1,33 @@ +#ifndef __LINUX_SPINLOCK_TYPES_NORT_H +#define __LINUX_SPINLOCK_TYPES_NORT_H @@ -13177,9 +14264,11 @@ diff -Nur linux-4.1.26.orig/include/linux/spinlock_types_nort.h linux-4.1.26/inc +#define DEFINE_SPINLOCK(x) spinlock_t x = __SPIN_LOCK_UNLOCKED(x) + +#endif -diff -Nur linux-4.1.26.orig/include/linux/spinlock_types_raw.h linux-4.1.26/include/linux/spinlock_types_raw.h ---- linux-4.1.26.orig/include/linux/spinlock_types_raw.h 1970-01-01 01:00:00.000000000 +0100 -+++ linux-4.1.26/include/linux/spinlock_types_raw.h 2016-06-19 15:30:58.679297041 +0200 +diff --git a/include/linux/spinlock_types_raw.h b/include/linux/spinlock_types_raw.h +new file mode 100644 +index 000000000000..edffc4d53fc9 +--- /dev/null ++++ b/include/linux/spinlock_types_raw.h @@ -0,0 +1,56 @@ +#ifndef __LINUX_SPINLOCK_TYPES_RAW_H +#define __LINUX_SPINLOCK_TYPES_RAW_H @@ -13237,9 +14326,11 @@ diff -Nur linux-4.1.26.orig/include/linux/spinlock_types_raw.h linux-4.1.26/incl +#define DEFINE_RAW_SPINLOCK(x) raw_spinlock_t x = __RAW_SPIN_LOCK_UNLOCKED(x) + +#endif -diff -Nur linux-4.1.26.orig/include/linux/spinlock_types_rt.h linux-4.1.26/include/linux/spinlock_types_rt.h ---- linux-4.1.26.orig/include/linux/spinlock_types_rt.h 1970-01-01 01:00:00.000000000 +0100 -+++ linux-4.1.26/include/linux/spinlock_types_rt.h 2016-06-19 15:30:58.679297041 +0200 +diff --git a/include/linux/spinlock_types_rt.h b/include/linux/spinlock_types_rt.h +new file mode 100644 +index 000000000000..9fd431967abc +--- /dev/null ++++ b/include/linux/spinlock_types_rt.h @@ -0,0 +1,51 @@ +#ifndef __LINUX_SPINLOCK_TYPES_RT_H +#define __LINUX_SPINLOCK_TYPES_RT_H @@ -13292,10 +14383,11 @@ diff -Nur linux-4.1.26.orig/include/linux/spinlock_types_rt.h linux-4.1.26/inclu + spinlock_t name __cacheline_aligned_in_smp = __SPIN_LOCK_UNLOCKED(name) + +#endif -diff -Nur linux-4.1.26.orig/include/linux/srcu.h linux-4.1.26/include/linux/srcu.h ---- linux-4.1.26.orig/include/linux/srcu.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/srcu.h 2016-06-19 15:30:58.679297041 +0200 -@@ -84,10 +84,10 @@ +diff --git a/include/linux/srcu.h b/include/linux/srcu.h +index bdeb4567b71e..a9c3c49cda5d 100644 +--- a/include/linux/srcu.h ++++ b/include/linux/srcu.h +@@ -84,10 +84,10 @@ int init_srcu_struct(struct srcu_struct *sp); void process_srcu(struct work_struct *work); @@ -13308,7 +14400,7 @@ diff -Nur linux-4.1.26.orig/include/linux/srcu.h linux-4.1.26/include/linux/srcu .queue_lock = __SPIN_LOCK_UNLOCKED(name.queue_lock), \ .running = false, \ .batch_queue = RCU_BATCH_INIT(name.batch_queue), \ -@@ -104,7 +104,7 @@ +@@ -104,7 +104,7 @@ void process_srcu(struct work_struct *work); */ #define __DEFINE_SRCU(name, is_static) \ static DEFINE_PER_CPU(struct srcu_struct_array, name##_srcu_array);\ @@ -13317,9 +14409,10 @@ diff -Nur linux-4.1.26.orig/include/linux/srcu.h linux-4.1.26/include/linux/srcu #define DEFINE_SRCU(name) __DEFINE_SRCU(name, /* not static */) #define DEFINE_STATIC_SRCU(name) __DEFINE_SRCU(name, static) -diff -Nur linux-4.1.26.orig/include/linux/swap.h linux-4.1.26/include/linux/swap.h ---- linux-4.1.26.orig/include/linux/swap.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/swap.h 2016-06-19 15:30:58.679297041 +0200 +diff --git a/include/linux/swap.h b/include/linux/swap.h +index cee108cbe2d5..4c07c12d2d82 100644 +--- a/include/linux/swap.h ++++ b/include/linux/swap.h @@ -11,6 +11,7 @@ #include <linux/fs.h> #include <linux/atomic.h> @@ -13328,7 +14421,7 @@ diff -Nur linux-4.1.26.orig/include/linux/swap.h linux-4.1.26/include/linux/swap #include <asm/page.h> struct notifier_block; -@@ -252,7 +253,8 @@ +@@ -252,7 +253,8 @@ struct swap_info_struct { void *workingset_eviction(struct address_space *mapping, struct page *page); bool workingset_refault(void *shadow); void workingset_activation(struct page *page); @@ -13338,7 +14431,7 @@ diff -Nur linux-4.1.26.orig/include/linux/swap.h linux-4.1.26/include/linux/swap static inline unsigned int workingset_node_pages(struct radix_tree_node *node) { -@@ -296,6 +298,7 @@ +@@ -296,6 +298,7 @@ extern unsigned long nr_free_pagecache_pages(void); /* linux/mm/swap.c */ @@ -13346,10 +14439,11 @@ diff -Nur linux-4.1.26.orig/include/linux/swap.h linux-4.1.26/include/linux/swap extern void lru_cache_add(struct page *); extern void lru_cache_add_anon(struct page *page); extern void lru_cache_add_file(struct page *page); -diff -Nur linux-4.1.26.orig/include/linux/thread_info.h linux-4.1.26/include/linux/thread_info.h ---- linux-4.1.26.orig/include/linux/thread_info.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/thread_info.h 2016-06-19 15:30:58.679297041 +0200 -@@ -102,7 +102,17 @@ +diff --git a/include/linux/thread_info.h b/include/linux/thread_info.h +index ff307b548ed3..be9f9dc6a4e1 100644 +--- a/include/linux/thread_info.h ++++ b/include/linux/thread_info.h +@@ -102,7 +102,17 @@ static inline int test_ti_thread_flag(struct thread_info *ti, int flag) #define test_thread_flag(flag) \ test_ti_thread_flag(current_thread_info(), flag) @@ -13368,10 +14462,11 @@ diff -Nur linux-4.1.26.orig/include/linux/thread_info.h linux-4.1.26/include/lin #if defined TIF_RESTORE_SIGMASK && !defined HAVE_SET_RESTORE_SIGMASK /* -diff -Nur linux-4.1.26.orig/include/linux/timer.h linux-4.1.26/include/linux/timer.h ---- linux-4.1.26.orig/include/linux/timer.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/timer.h 2016-06-19 15:30:58.679297041 +0200 -@@ -241,7 +241,7 @@ +diff --git a/include/linux/timer.h b/include/linux/timer.h +index 8c5a197e1587..5fcd72c57ebe 100644 +--- a/include/linux/timer.h ++++ b/include/linux/timer.h +@@ -241,7 +241,7 @@ extern void add_timer(struct timer_list *timer); extern int try_to_del_timer_sync(struct timer_list *timer); @@ -13380,9 +14475,10 @@ diff -Nur linux-4.1.26.orig/include/linux/timer.h linux-4.1.26/include/linux/tim extern int del_timer_sync(struct timer_list *timer); #else # define del_timer_sync(t) del_timer(t) -diff -Nur linux-4.1.26.orig/include/linux/uaccess.h linux-4.1.26/include/linux/uaccess.h ---- linux-4.1.26.orig/include/linux/uaccess.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/uaccess.h 2016-06-19 15:30:58.679297041 +0200 +diff --git a/include/linux/uaccess.h b/include/linux/uaccess.h +index ecd3319dac33..941b2dab50cd 100644 +--- a/include/linux/uaccess.h ++++ b/include/linux/uaccess.h @@ -1,21 +1,31 @@ #ifndef __LINUX_UACCESS_H__ #define __LINUX_UACCESS_H__ @@ -13423,7 +14519,7 @@ diff -Nur linux-4.1.26.orig/include/linux/uaccess.h linux-4.1.26/include/linux/u /* * make sure to have issued the store before a pagefault * can hit. -@@ -25,18 +35,32 @@ +@@ -25,18 +35,32 @@ static inline void pagefault_disable(void) static inline void pagefault_enable(void) { @@ -13461,9 +14557,10 @@ diff -Nur linux-4.1.26.orig/include/linux/uaccess.h linux-4.1.26/include/linux/u #ifndef ARCH_HAS_NOCACHE_UACCESS static inline unsigned long __copy_from_user_inatomic_nocache(void *to, -diff -Nur linux-4.1.26.orig/include/linux/uprobes.h linux-4.1.26/include/linux/uprobes.h ---- linux-4.1.26.orig/include/linux/uprobes.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/uprobes.h 2016-06-19 15:30:58.679297041 +0200 +diff --git a/include/linux/uprobes.h b/include/linux/uprobes.h +index 60beb5dc7977..f5a644c649b4 100644 +--- a/include/linux/uprobes.h ++++ b/include/linux/uprobes.h @@ -27,6 +27,7 @@ #include <linux/errno.h> #include <linux/rbtree.h> @@ -13472,10 +14569,11 @@ diff -Nur linux-4.1.26.orig/include/linux/uprobes.h linux-4.1.26/include/linux/u struct vm_area_struct; struct mm_struct; -diff -Nur linux-4.1.26.orig/include/linux/vmstat.h linux-4.1.26/include/linux/vmstat.h ---- linux-4.1.26.orig/include/linux/vmstat.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/vmstat.h 2016-06-19 15:30:58.679297041 +0200 -@@ -33,7 +33,9 @@ +diff --git a/include/linux/vmstat.h b/include/linux/vmstat.h +index 82e7db7f7100..3feaf770a8bd 100644 +--- a/include/linux/vmstat.h ++++ b/include/linux/vmstat.h +@@ -33,7 +33,9 @@ DECLARE_PER_CPU(struct vm_event_state, vm_event_states); */ static inline void __count_vm_event(enum vm_event_item item) { @@ -13485,7 +14583,7 @@ diff -Nur linux-4.1.26.orig/include/linux/vmstat.h linux-4.1.26/include/linux/vm } static inline void count_vm_event(enum vm_event_item item) -@@ -43,7 +45,9 @@ +@@ -43,7 +45,9 @@ static inline void count_vm_event(enum vm_event_item item) static inline void __count_vm_events(enum vm_event_item item, long delta) { @@ -13495,20 +14593,11 @@ diff -Nur linux-4.1.26.orig/include/linux/vmstat.h linux-4.1.26/include/linux/vm } static inline void count_vm_events(enum vm_event_item item, long delta) -diff -Nur linux-4.1.26.orig/include/linux/wait.h linux-4.1.26/include/linux/wait.h ---- linux-4.1.26.orig/include/linux/wait.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/linux/wait.h 2016-06-19 15:30:58.679297041 +0200 -@@ -8,6 +8,7 @@ - #include <linux/spinlock.h> - #include <asm/current.h> - #include <uapi/linux/wait.h> -+#include <linux/atomic.h> - - typedef struct __wait_queue wait_queue_t; - typedef int (*wait_queue_func_t)(wait_queue_t *wait, unsigned mode, int flags, void *key); -diff -Nur linux-4.1.26.orig/include/linux/wait-simple.h linux-4.1.26/include/linux/wait-simple.h ---- linux-4.1.26.orig/include/linux/wait-simple.h 1970-01-01 01:00:00.000000000 +0100 -+++ linux-4.1.26/include/linux/wait-simple.h 2016-06-19 15:30:58.679297041 +0200 +diff --git a/include/linux/wait-simple.h b/include/linux/wait-simple.h +new file mode 100644 +index 000000000000..f86bca2c41d5 +--- /dev/null ++++ b/include/linux/wait-simple.h @@ -0,0 +1,207 @@ +#ifndef _LINUX_WAIT_SIMPLE_H +#define _LINUX_WAIT_SIMPLE_H @@ -13717,9 +14806,23 @@ diff -Nur linux-4.1.26.orig/include/linux/wait-simple.h linux-4.1.26/include/lin +}) + +#endif -diff -Nur linux-4.1.26.orig/include/linux/work-simple.h linux-4.1.26/include/linux/work-simple.h ---- linux-4.1.26.orig/include/linux/work-simple.h 1970-01-01 01:00:00.000000000 +0100 -+++ linux-4.1.26/include/linux/work-simple.h 2016-06-19 15:30:58.679297041 +0200 +diff --git a/include/linux/wait.h b/include/linux/wait.h +index 2db83349865b..b3b54c26b6a0 100644 +--- a/include/linux/wait.h ++++ b/include/linux/wait.h +@@ -8,6 +8,7 @@ + #include <linux/spinlock.h> + #include <asm/current.h> + #include <uapi/linux/wait.h> ++#include <linux/atomic.h> + + typedef struct __wait_queue wait_queue_t; + typedef int (*wait_queue_func_t)(wait_queue_t *wait, unsigned mode, int flags, void *key); +diff --git a/include/linux/work-simple.h b/include/linux/work-simple.h +new file mode 100644 +index 000000000000..f175fa9a6016 +--- /dev/null ++++ b/include/linux/work-simple.h @@ -0,0 +1,24 @@ +#ifndef _LINUX_SWORK_H +#define _LINUX_SWORK_H @@ -13745,10 +14848,11 @@ diff -Nur linux-4.1.26.orig/include/linux/work-simple.h linux-4.1.26/include/lin +void swork_put(void); + +#endif /* _LINUX_SWORK_H */ -diff -Nur linux-4.1.26.orig/include/net/dst.h linux-4.1.26/include/net/dst.h ---- linux-4.1.26.orig/include/net/dst.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/net/dst.h 2016-06-19 15:30:58.679297041 +0200 -@@ -436,7 +436,7 @@ +diff --git a/include/net/dst.h b/include/net/dst.h +index 182b812d45e1..74baade721d6 100644 +--- a/include/net/dst.h ++++ b/include/net/dst.h +@@ -436,7 +436,7 @@ static inline void dst_confirm(struct dst_entry *dst) static inline int dst_neigh_output(struct dst_entry *dst, struct neighbour *n, struct sk_buff *skb) { @@ -13757,10 +14861,11 @@ diff -Nur linux-4.1.26.orig/include/net/dst.h linux-4.1.26/include/net/dst.h if (dst->pending_confirm) { unsigned long now = jiffies; -diff -Nur linux-4.1.26.orig/include/net/neighbour.h linux-4.1.26/include/net/neighbour.h ---- linux-4.1.26.orig/include/net/neighbour.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/net/neighbour.h 2016-06-19 15:30:58.679297041 +0200 -@@ -445,7 +445,7 @@ +diff --git a/include/net/neighbour.h b/include/net/neighbour.h +index bd33e66f49aa..9c38018c6038 100644 +--- a/include/net/neighbour.h ++++ b/include/net/neighbour.h +@@ -445,7 +445,7 @@ static inline int neigh_hh_bridge(struct hh_cache *hh, struct sk_buff *skb) } #endif @@ -13769,7 +14874,7 @@ diff -Nur linux-4.1.26.orig/include/net/neighbour.h linux-4.1.26/include/net/nei { unsigned int seq; int hh_len; -@@ -500,7 +500,7 @@ +@@ -500,7 +500,7 @@ struct neighbour_cb { #define NEIGH_CB(skb) ((struct neighbour_cb *)(skb)->cb) @@ -13778,10 +14883,11 @@ diff -Nur linux-4.1.26.orig/include/net/neighbour.h linux-4.1.26/include/net/nei const struct net_device *dev) { unsigned int seq; -diff -Nur linux-4.1.26.orig/include/net/netns/ipv4.h linux-4.1.26/include/net/netns/ipv4.h ---- linux-4.1.26.orig/include/net/netns/ipv4.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/net/netns/ipv4.h 2016-06-19 15:30:58.683297195 +0200 -@@ -69,6 +69,7 @@ +diff --git a/include/net/netns/ipv4.h b/include/net/netns/ipv4.h +index 614a49be68a9..b4bdbe10b77a 100644 +--- a/include/net/netns/ipv4.h ++++ b/include/net/netns/ipv4.h +@@ -69,6 +69,7 @@ struct netns_ipv4 { int sysctl_icmp_echo_ignore_all; int sysctl_icmp_echo_ignore_broadcasts; @@ -13789,9 +14895,11 @@ diff -Nur linux-4.1.26.orig/include/net/netns/ipv4.h linux-4.1.26/include/net/ne int sysctl_icmp_ignore_bogus_error_responses; int sysctl_icmp_ratelimit; int sysctl_icmp_ratemask; -diff -Nur linux-4.1.26.orig/include/trace/events/hist.h linux-4.1.26/include/trace/events/hist.h ---- linux-4.1.26.orig/include/trace/events/hist.h 1970-01-01 01:00:00.000000000 +0100 -+++ linux-4.1.26/include/trace/events/hist.h 2016-06-19 15:30:58.683297195 +0200 +diff --git a/include/trace/events/hist.h b/include/trace/events/hist.h +new file mode 100644 +index 000000000000..37f6eb8c9dc2 +--- /dev/null ++++ b/include/trace/events/hist.h @@ -0,0 +1,74 @@ +#undef TRACE_SYSTEM +#define TRACE_SYSTEM hist @@ -13867,9 +14975,11 @@ diff -Nur linux-4.1.26.orig/include/trace/events/hist.h linux-4.1.26/include/tra + +/* This part must be outside protection */ +#include <trace/define_trace.h> -diff -Nur linux-4.1.26.orig/include/trace/events/latency_hist.h linux-4.1.26/include/trace/events/latency_hist.h ---- linux-4.1.26.orig/include/trace/events/latency_hist.h 1970-01-01 01:00:00.000000000 +0100 -+++ linux-4.1.26/include/trace/events/latency_hist.h 2016-06-19 15:30:58.683297195 +0200 +diff --git a/include/trace/events/latency_hist.h b/include/trace/events/latency_hist.h +new file mode 100644 +index 000000000000..d3f2fbd560b1 +--- /dev/null ++++ b/include/trace/events/latency_hist.h @@ -0,0 +1,29 @@ +#ifndef _LATENCY_HIST_H +#define _LATENCY_HIST_H @@ -13900,10 +15010,11 @@ diff -Nur linux-4.1.26.orig/include/trace/events/latency_hist.h linux-4.1.26/inc +} + +#endif /* _LATENCY_HIST_H */ -diff -Nur linux-4.1.26.orig/include/trace/events/sched.h linux-4.1.26/include/trace/events/sched.h ---- linux-4.1.26.orig/include/trace/events/sched.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/include/trace/events/sched.h 2016-06-19 15:30:58.683297195 +0200 -@@ -55,9 +55,9 @@ +diff --git a/include/trace/events/sched.h b/include/trace/events/sched.h +index 30fedaf3e56a..3b63828390a6 100644 +--- a/include/trace/events/sched.h ++++ b/include/trace/events/sched.h +@@ -55,9 +55,9 @@ TRACE_EVENT(sched_kthread_stop_ret, */ DECLARE_EVENT_CLASS(sched_wakeup_template, @@ -13915,7 +15026,7 @@ diff -Nur linux-4.1.26.orig/include/trace/events/sched.h linux-4.1.26/include/tr TP_STRUCT__entry( __array( char, comm, TASK_COMM_LEN ) -@@ -71,25 +71,37 @@ +@@ -71,25 +71,37 @@ DECLARE_EVENT_CLASS(sched_wakeup_template, memcpy(__entry->comm, p->comm, TASK_COMM_LEN); __entry->pid = p->pid; __entry->prio = p->prio; @@ -13960,10 +15071,11 @@ diff -Nur linux-4.1.26.orig/include/trace/events/sched.h linux-4.1.26/include/tr #ifdef CREATE_TRACE_POINTS static inline long __trace_sched_switch_state(struct task_struct *p) -diff -Nur linux-4.1.26.orig/init/Kconfig linux-4.1.26/init/Kconfig ---- linux-4.1.26.orig/init/Kconfig 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/init/Kconfig 2016-06-19 15:30:58.683297195 +0200 -@@ -637,7 +637,7 @@ +diff --git a/init/Kconfig b/init/Kconfig +index dc24dec60232..a70b5002df06 100644 +--- a/init/Kconfig ++++ b/init/Kconfig +@@ -637,7 +637,7 @@ config RCU_FANOUT_EXACT config RCU_FAST_NO_HZ bool "Accelerate last non-dyntick-idle CPU's grace periods" @@ -13972,7 +15084,7 @@ diff -Nur linux-4.1.26.orig/init/Kconfig linux-4.1.26/init/Kconfig default n help This option permits CPUs to enter dynticks-idle state even if -@@ -664,7 +664,7 @@ +@@ -664,7 +664,7 @@ config TREE_RCU_TRACE config RCU_BOOST bool "Enable RCU priority boosting" depends on RT_MUTEXES && PREEMPT_RCU @@ -13981,7 +15093,7 @@ diff -Nur linux-4.1.26.orig/init/Kconfig linux-4.1.26/init/Kconfig help This option boosts the priority of preempted RCU readers that block the current preemptible RCU grace period for too long. -@@ -1101,6 +1101,7 @@ +@@ -1101,6 +1101,7 @@ config CFS_BANDWIDTH config RT_GROUP_SCHED bool "Group scheduling for SCHED_RR/FIFO" depends on CGROUP_SCHED @@ -13989,7 +15101,7 @@ diff -Nur linux-4.1.26.orig/init/Kconfig linux-4.1.26/init/Kconfig default n help This feature lets you explicitly allocate real CPU bandwidth -@@ -1688,6 +1689,7 @@ +@@ -1688,6 +1689,7 @@ choice config SLAB bool "SLAB" @@ -13997,7 +15109,7 @@ diff -Nur linux-4.1.26.orig/init/Kconfig linux-4.1.26/init/Kconfig help The regular slab allocator that is established and known to work well in all environments. It organizes cache hot objects in -@@ -1706,6 +1708,7 @@ +@@ -1706,6 +1708,7 @@ config SLUB config SLOB depends on EXPERT bool "SLOB (Simple Allocator)" @@ -14005,7 +15117,7 @@ diff -Nur linux-4.1.26.orig/init/Kconfig linux-4.1.26/init/Kconfig help SLOB replaces the stock allocator with a drastically simpler allocator. SLOB is generally more space efficient but -@@ -1715,7 +1718,7 @@ +@@ -1715,7 +1718,7 @@ endchoice config SLUB_CPU_PARTIAL default y @@ -14014,10 +15126,21 @@ diff -Nur linux-4.1.26.orig/init/Kconfig linux-4.1.26/init/Kconfig bool "SLUB per cpu partial cache" help Per cpu partial caches accellerate objects allocation and freeing -diff -Nur linux-4.1.26.orig/init/main.c linux-4.1.26/init/main.c ---- linux-4.1.26.orig/init/main.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/init/main.c 2016-06-19 15:30:58.683297195 +0200 -@@ -525,6 +525,7 @@ +diff --git a/init/Makefile b/init/Makefile +index 7bc47ee31c36..88cf473554e0 100644 +--- a/init/Makefile ++++ b/init/Makefile +@@ -33,4 +33,4 @@ silent_chk_compile.h = : + include/generated/compile.h: FORCE + @$($(quiet)chk_compile.h) + $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkcompile_h $@ \ +- "$(UTS_MACHINE)" "$(CONFIG_SMP)" "$(CONFIG_PREEMPT)" "$(CC) $(KBUILD_CFLAGS)" ++ "$(UTS_MACHINE)" "$(CONFIG_SMP)" "$(CONFIG_PREEMPT)" "$(CONFIG_PREEMPT_RT_FULL)" "$(CC) $(KBUILD_CFLAGS)" +diff --git a/init/main.c b/init/main.c +index 2a89545e0a5d..0486a8e11fc0 100644 +--- a/init/main.c ++++ b/init/main.c +@@ -525,6 +525,7 @@ asmlinkage __visible void __init start_kernel(void) setup_command_line(command_line); setup_nr_cpu_ids(); setup_per_cpu_areas(); @@ -14025,18 +15148,10 @@ diff -Nur linux-4.1.26.orig/init/main.c linux-4.1.26/init/main.c smp_prepare_boot_cpu(); /* arch-specific boot-cpu hooks */ build_all_zonelists(NULL, NULL); -diff -Nur linux-4.1.26.orig/init/Makefile linux-4.1.26/init/Makefile ---- linux-4.1.26.orig/init/Makefile 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/init/Makefile 2016-06-19 15:30:58.683297195 +0200 -@@ -33,4 +33,4 @@ - include/generated/compile.h: FORCE - @$($(quiet)chk_compile.h) - $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkcompile_h $@ \ -- "$(UTS_MACHINE)" "$(CONFIG_SMP)" "$(CONFIG_PREEMPT)" "$(CC) $(KBUILD_CFLAGS)" -+ "$(UTS_MACHINE)" "$(CONFIG_SMP)" "$(CONFIG_PREEMPT)" "$(CONFIG_PREEMPT_RT_FULL)" "$(CC) $(KBUILD_CFLAGS)" -diff -Nur linux-4.1.26.orig/ipc/mqueue.c linux-4.1.26/ipc/mqueue.c ---- linux-4.1.26.orig/ipc/mqueue.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/ipc/mqueue.c 2016-06-19 15:30:58.683297195 +0200 +diff --git a/ipc/mqueue.c b/ipc/mqueue.c +index c3fc5c2b63f3..161a1807e6ef 100644 +--- a/ipc/mqueue.c ++++ b/ipc/mqueue.c @@ -47,8 +47,7 @@ #define RECV 1 @@ -14047,7 +15162,7 @@ diff -Nur linux-4.1.26.orig/ipc/mqueue.c linux-4.1.26/ipc/mqueue.c struct posix_msg_tree_node { struct rb_node rb_node; -@@ -568,15 +567,12 @@ +@@ -568,15 +567,12 @@ static int wq_sleep(struct mqueue_inode_info *info, int sr, wq_add(info, sr, ewp); for (;;) { @@ -14064,7 +15179,7 @@ diff -Nur linux-4.1.26.orig/ipc/mqueue.c linux-4.1.26/ipc/mqueue.c if (ewp->state == STATE_READY) { retval = 0; goto out; -@@ -904,11 +900,15 @@ +@@ -904,11 +900,15 @@ out_name: * list of waiting receivers. A sender checks that list before adding the new * message into the message array. If there is a waiting receiver, then it * bypasses the message array and directly hands the message over to the @@ -14085,7 +15200,7 @@ diff -Nur linux-4.1.26.orig/ipc/mqueue.c linux-4.1.26/ipc/mqueue.c * * The same algorithm is used for senders. */ -@@ -916,21 +916,29 @@ +@@ -916,21 +916,29 @@ out_name: /* pipelined_send() - send a message directly to the task waiting in * sys_mq_timedreceive() (without inserting message into a queue). */ @@ -14120,7 +15235,7 @@ diff -Nur linux-4.1.26.orig/ipc/mqueue.c linux-4.1.26/ipc/mqueue.c { struct ext_wait_queue *sender = wq_get_first_waiter(info, SEND); -@@ -941,10 +949,9 @@ +@@ -941,10 +949,9 @@ static inline void pipelined_receive(struct mqueue_inode_info *info) } if (msg_insert(sender->msg, info)) return; @@ -14133,7 +15248,7 @@ diff -Nur linux-4.1.26.orig/ipc/mqueue.c linux-4.1.26/ipc/mqueue.c sender->state = STATE_READY; } -@@ -962,6 +969,7 @@ +@@ -962,6 +969,7 @@ SYSCALL_DEFINE5(mq_timedsend, mqd_t, mqdes, const char __user *, u_msg_ptr, struct timespec ts; struct posix_msg_tree_node *new_leaf = NULL; int ret = 0; @@ -14141,7 +15256,7 @@ diff -Nur linux-4.1.26.orig/ipc/mqueue.c linux-4.1.26/ipc/mqueue.c if (u_abs_timeout) { int res = prepare_timeout(u_abs_timeout, &expires, &ts); -@@ -1045,7 +1053,7 @@ +@@ -1045,7 +1053,7 @@ SYSCALL_DEFINE5(mq_timedsend, mqd_t, mqdes, const char __user *, u_msg_ptr, } else { receiver = wq_get_first_waiter(info, RECV); if (receiver) { @@ -14150,7 +15265,7 @@ diff -Nur linux-4.1.26.orig/ipc/mqueue.c linux-4.1.26/ipc/mqueue.c } else { /* adds message to the queue */ ret = msg_insert(msg_ptr, info); -@@ -1058,6 +1066,7 @@ +@@ -1058,6 +1066,7 @@ SYSCALL_DEFINE5(mq_timedsend, mqd_t, mqdes, const char __user *, u_msg_ptr, } out_unlock: spin_unlock(&info->lock); @@ -14158,7 +15273,7 @@ diff -Nur linux-4.1.26.orig/ipc/mqueue.c linux-4.1.26/ipc/mqueue.c out_free: if (ret) free_msg(msg_ptr); -@@ -1144,14 +1153,17 @@ +@@ -1144,14 +1153,17 @@ SYSCALL_DEFINE5(mq_timedreceive, mqd_t, mqdes, char __user *, u_msg_ptr, msg_ptr = wait.msg; } } else { @@ -14177,10 +15292,11 @@ diff -Nur linux-4.1.26.orig/ipc/mqueue.c linux-4.1.26/ipc/mqueue.c ret = 0; } if (ret == 0) { -diff -Nur linux-4.1.26.orig/ipc/msg.c linux-4.1.26/ipc/msg.c ---- linux-4.1.26.orig/ipc/msg.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/ipc/msg.c 2016-06-19 15:30:58.683297195 +0200 -@@ -188,6 +188,12 @@ +diff --git a/ipc/msg.c b/ipc/msg.c +index 3b2b0f5149ab..a75e79ff05ee 100644 +--- a/ipc/msg.c ++++ b/ipc/msg.c +@@ -188,6 +188,12 @@ static void expunge_all(struct msg_queue *msq, int res) struct msg_receiver *msr, *t; list_for_each_entry_safe(msr, t, &msq->q_receivers, r_list) { @@ -14193,7 +15309,7 @@ diff -Nur linux-4.1.26.orig/ipc/msg.c linux-4.1.26/ipc/msg.c msr->r_msg = NULL; /* initialize expunge ordering */ wake_up_process(msr->r_tsk); /* -@@ -198,6 +204,8 @@ +@@ -198,6 +204,8 @@ static void expunge_all(struct msg_queue *msq, int res) */ smp_mb(); msr->r_msg = ERR_PTR(res); @@ -14202,7 +15318,7 @@ diff -Nur linux-4.1.26.orig/ipc/msg.c linux-4.1.26/ipc/msg.c } } -@@ -574,6 +582,11 @@ +@@ -574,6 +582,11 @@ static inline int pipelined_send(struct msg_queue *msq, struct msg_msg *msg) if (testmsg(msg, msr->r_msgtype, msr->r_mode) && !security_msg_queue_msgrcv(msq, msg, msr->r_tsk, msr->r_msgtype, msr->r_mode)) { @@ -14214,7 +15330,7 @@ diff -Nur linux-4.1.26.orig/ipc/msg.c linux-4.1.26/ipc/msg.c list_del(&msr->r_list); if (msr->r_maxsize < msg->m_ts) { -@@ -595,12 +608,13 @@ +@@ -595,12 +608,13 @@ static inline int pipelined_send(struct msg_queue *msq, struct msg_msg *msg) */ smp_mb(); msr->r_msg = msg; @@ -14229,10 +15345,11 @@ diff -Nur linux-4.1.26.orig/ipc/msg.c linux-4.1.26/ipc/msg.c return 0; } -diff -Nur linux-4.1.26.orig/ipc/sem.c linux-4.1.26/ipc/sem.c ---- linux-4.1.26.orig/ipc/sem.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/ipc/sem.c 2016-06-19 15:30:58.683297195 +0200 -@@ -690,6 +690,13 @@ +diff --git a/ipc/sem.c b/ipc/sem.c +index 534caee6bf33..fbfdb0b699e0 100644 +--- a/ipc/sem.c ++++ b/ipc/sem.c +@@ -690,6 +690,13 @@ undo: static void wake_up_sem_queue_prepare(struct list_head *pt, struct sem_queue *q, int error) { @@ -14246,7 +15363,7 @@ diff -Nur linux-4.1.26.orig/ipc/sem.c linux-4.1.26/ipc/sem.c if (list_empty(pt)) { /* * Hold preempt off so that we don't get preempted and have the -@@ -701,6 +708,7 @@ +@@ -701,6 +708,7 @@ static void wake_up_sem_queue_prepare(struct list_head *pt, q->pid = error; list_add_tail(&q->list, pt); @@ -14254,7 +15371,7 @@ diff -Nur linux-4.1.26.orig/ipc/sem.c linux-4.1.26/ipc/sem.c } /** -@@ -714,6 +722,7 @@ +@@ -714,6 +722,7 @@ static void wake_up_sem_queue_prepare(struct list_head *pt, */ static void wake_up_sem_queue_do(struct list_head *pt) { @@ -14262,7 +15379,7 @@ diff -Nur linux-4.1.26.orig/ipc/sem.c linux-4.1.26/ipc/sem.c struct sem_queue *q, *t; int did_something; -@@ -726,6 +735,7 @@ +@@ -726,6 +735,7 @@ static void wake_up_sem_queue_do(struct list_head *pt) } if (did_something) preempt_enable(); @@ -14270,9 +15387,84 @@ diff -Nur linux-4.1.26.orig/ipc/sem.c linux-4.1.26/ipc/sem.c } static void unlink_queue(struct sem_array *sma, struct sem_queue *q) -diff -Nur linux-4.1.26.orig/kernel/bpf/hashtab.c linux-4.1.26/kernel/bpf/hashtab.c ---- linux-4.1.26.orig/kernel/bpf/hashtab.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/bpf/hashtab.c 2016-06-19 15:30:58.683297195 +0200 +diff --git a/kernel/Kconfig.locks b/kernel/Kconfig.locks +index 08561f1acd13..c61e9131ecec 100644 +--- a/kernel/Kconfig.locks ++++ b/kernel/Kconfig.locks +@@ -225,11 +225,11 @@ config ARCH_SUPPORTS_ATOMIC_RMW + + config MUTEX_SPIN_ON_OWNER + def_bool y +- depends on SMP && !DEBUG_MUTEXES && ARCH_SUPPORTS_ATOMIC_RMW ++ depends on SMP && !DEBUG_MUTEXES && ARCH_SUPPORTS_ATOMIC_RMW && !PREEMPT_RT_FULL + + config RWSEM_SPIN_ON_OWNER + def_bool y +- depends on SMP && RWSEM_XCHGADD_ALGORITHM && ARCH_SUPPORTS_ATOMIC_RMW ++ depends on SMP && RWSEM_XCHGADD_ALGORITHM && ARCH_SUPPORTS_ATOMIC_RMW && !PREEMPT_RT_FULL + + config LOCK_SPIN_ON_OWNER + def_bool y +diff --git a/kernel/Kconfig.preempt b/kernel/Kconfig.preempt +index 3f9c97419f02..11dbe26a8279 100644 +--- a/kernel/Kconfig.preempt ++++ b/kernel/Kconfig.preempt +@@ -1,3 +1,16 @@ ++config PREEMPT ++ bool ++ select PREEMPT_COUNT ++ ++config PREEMPT_RT_BASE ++ bool ++ select PREEMPT ++ ++config HAVE_PREEMPT_LAZY ++ bool ++ ++config PREEMPT_LAZY ++ def_bool y if HAVE_PREEMPT_LAZY && PREEMPT_RT_FULL + + choice + prompt "Preemption Model" +@@ -33,9 +46,9 @@ config PREEMPT_VOLUNTARY + + Select this if you are building a kernel for a desktop system. + +-config PREEMPT ++config PREEMPT__LL + bool "Preemptible Kernel (Low-Latency Desktop)" +- select PREEMPT_COUNT ++ select PREEMPT + select UNINLINE_SPIN_UNLOCK if !ARCH_INLINE_SPIN_UNLOCK + help + This option reduces the latency of the kernel by making +@@ -52,6 +65,22 @@ config PREEMPT + embedded system with latency requirements in the milliseconds + range. + ++config PREEMPT_RTB ++ bool "Preemptible Kernel (Basic RT)" ++ select PREEMPT_RT_BASE ++ help ++ This option is basically the same as (Low-Latency Desktop) but ++ enables changes which are preliminary for the full preemptible ++ RT kernel. ++ ++config PREEMPT_RT_FULL ++ bool "Fully Preemptible Kernel (RT)" ++ depends on IRQ_FORCED_THREADING ++ select PREEMPT_RT_BASE ++ select PREEMPT_RCU ++ help ++ All and everything ++ + endchoice + + config PREEMPT_COUNT +diff --git a/kernel/bpf/hashtab.c b/kernel/bpf/hashtab.c +index 83c209d9b17a..972b76bf54b7 100644 +--- a/kernel/bpf/hashtab.c ++++ b/kernel/bpf/hashtab.c @@ -17,7 +17,7 @@ struct bpf_htab { struct bpf_map map; @@ -14282,7 +15474,7 @@ diff -Nur linux-4.1.26.orig/kernel/bpf/hashtab.c linux-4.1.26/kernel/bpf/hashtab u32 count; /* number of elements in this hashtable */ u32 n_buckets; /* number of hash buckets */ u32 elem_size; /* size of each element in bytes */ -@@ -82,7 +82,7 @@ +@@ -82,7 +82,7 @@ static struct bpf_map *htab_map_alloc(union bpf_attr *attr) for (i = 0; i < htab->n_buckets; i++) INIT_HLIST_HEAD(&htab->buckets[i]); @@ -14291,7 +15483,7 @@ diff -Nur linux-4.1.26.orig/kernel/bpf/hashtab.c linux-4.1.26/kernel/bpf/hashtab htab->count = 0; htab->elem_size = sizeof(struct htab_elem) + -@@ -230,7 +230,7 @@ +@@ -230,7 +230,7 @@ static int htab_map_update_elem(struct bpf_map *map, void *key, void *value, l_new->hash = htab_map_hash(l_new->key, key_size); /* bpf_map_update_elem() can be called in_irq() */ @@ -14300,7 +15492,7 @@ diff -Nur linux-4.1.26.orig/kernel/bpf/hashtab.c linux-4.1.26/kernel/bpf/hashtab head = select_bucket(htab, l_new->hash); -@@ -266,11 +266,11 @@ +@@ -266,11 +266,11 @@ static int htab_map_update_elem(struct bpf_map *map, void *key, void *value, } else { htab->count++; } @@ -14314,7 +15506,7 @@ diff -Nur linux-4.1.26.orig/kernel/bpf/hashtab.c linux-4.1.26/kernel/bpf/hashtab kfree(l_new); return ret; } -@@ -291,7 +291,7 @@ +@@ -291,7 +291,7 @@ static int htab_map_delete_elem(struct bpf_map *map, void *key) hash = htab_map_hash(key, key_size); @@ -14323,7 +15515,7 @@ diff -Nur linux-4.1.26.orig/kernel/bpf/hashtab.c linux-4.1.26/kernel/bpf/hashtab head = select_bucket(htab, hash); -@@ -304,7 +304,7 @@ +@@ -304,7 +304,7 @@ static int htab_map_delete_elem(struct bpf_map *map, void *key) ret = 0; } @@ -14332,10 +15524,11 @@ diff -Nur linux-4.1.26.orig/kernel/bpf/hashtab.c linux-4.1.26/kernel/bpf/hashtab return ret; } -diff -Nur linux-4.1.26.orig/kernel/cgroup.c linux-4.1.26/kernel/cgroup.c ---- linux-4.1.26.orig/kernel/cgroup.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/cgroup.c 2016-06-19 15:30:58.687297349 +0200 -@@ -4422,10 +4422,10 @@ +diff --git a/kernel/cgroup.c b/kernel/cgroup.c +index 3abce1e0f910..d818976f1d62 100644 +--- a/kernel/cgroup.c ++++ b/kernel/cgroup.c +@@ -4423,10 +4423,10 @@ static void css_free_rcu_fn(struct rcu_head *rcu_head) queue_work(cgroup_destroy_wq, &css->destroy_work); } @@ -14348,7 +15541,7 @@ diff -Nur linux-4.1.26.orig/kernel/cgroup.c linux-4.1.26/kernel/cgroup.c struct cgroup_subsys *ss = css->ss; struct cgroup *cgrp = css->cgroup; -@@ -4464,8 +4464,8 @@ +@@ -4465,8 +4465,8 @@ static void css_release(struct percpu_ref *ref) struct cgroup_subsys_state *css = container_of(ref, struct cgroup_subsys_state, refcnt); @@ -14359,7 +15552,7 @@ diff -Nur linux-4.1.26.orig/kernel/cgroup.c linux-4.1.26/kernel/cgroup.c } static void init_and_link_css(struct cgroup_subsys_state *css, -@@ -5081,6 +5081,7 @@ +@@ -5080,6 +5080,7 @@ static int __init cgroup_wq_init(void) */ cgroup_destroy_wq = alloc_workqueue("cgroup_destroy", 0, 1); BUG_ON(!cgroup_destroy_wq); @@ -14367,10 +15560,11 @@ diff -Nur linux-4.1.26.orig/kernel/cgroup.c linux-4.1.26/kernel/cgroup.c /* * Used to destroy pidlists and separate to serve as flush domain. -diff -Nur linux-4.1.26.orig/kernel/cpu.c linux-4.1.26/kernel/cpu.c ---- linux-4.1.26.orig/kernel/cpu.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/cpu.c 2016-06-19 15:30:58.687297349 +0200 -@@ -74,8 +74,8 @@ +diff --git a/kernel/cpu.c b/kernel/cpu.c +index 94bbe4695232..0351ac42263e 100644 +--- a/kernel/cpu.c ++++ b/kernel/cpu.c +@@ -74,8 +74,8 @@ static struct { #endif } cpu_hotplug = { .active_writer = NULL, @@ -14380,7 +15574,7 @@ diff -Nur linux-4.1.26.orig/kernel/cpu.c linux-4.1.26/kernel/cpu.c #ifdef CONFIG_DEBUG_LOCK_ALLOC .dep_map = {.name = "cpu_hotplug.lock" }, #endif -@@ -88,6 +88,289 @@ +@@ -88,6 +88,289 @@ static struct { #define cpuhp_lock_acquire() lock_map_acquire(&cpu_hotplug.dep_map) #define cpuhp_lock_release() lock_map_release(&cpu_hotplug.dep_map) @@ -14670,7 +15864,7 @@ diff -Nur linux-4.1.26.orig/kernel/cpu.c linux-4.1.26/kernel/cpu.c void get_online_cpus(void) { -@@ -349,13 +632,15 @@ +@@ -349,13 +632,15 @@ static int __ref take_cpu_down(void *_param) /* Requires cpu_add_remove_lock to be held */ static int __ref _cpu_down(unsigned int cpu, int tasks_frozen) { @@ -14687,7 +15881,7 @@ diff -Nur linux-4.1.26.orig/kernel/cpu.c linux-4.1.26/kernel/cpu.c if (num_online_cpus() == 1) return -EBUSY; -@@ -363,7 +648,34 @@ +@@ -363,7 +648,34 @@ static int __ref _cpu_down(unsigned int cpu, int tasks_frozen) if (!cpu_online(cpu)) return -EINVAL; @@ -14722,7 +15916,7 @@ diff -Nur linux-4.1.26.orig/kernel/cpu.c linux-4.1.26/kernel/cpu.c err = __cpu_notify(CPU_DOWN_PREPARE | mod, hcpu, -1, &nr_calls); if (err) { -@@ -389,8 +701,12 @@ +@@ -389,8 +701,12 @@ static int __ref _cpu_down(unsigned int cpu, int tasks_frozen) #endif synchronize_rcu(); @@ -14735,7 +15929,7 @@ diff -Nur linux-4.1.26.orig/kernel/cpu.c linux-4.1.26/kernel/cpu.c /* * So now all preempt/rcu users must observe !cpu_active(). */ -@@ -427,9 +743,14 @@ +@@ -427,9 +743,14 @@ static int __ref _cpu_down(unsigned int cpu, int tasks_frozen) check_for_tasks(cpu); out_release: @@ -14750,10 +15944,11 @@ diff -Nur linux-4.1.26.orig/kernel/cpu.c linux-4.1.26/kernel/cpu.c return err; } -diff -Nur linux-4.1.26.orig/kernel/debug/kdb/kdb_io.c linux-4.1.26/kernel/debug/kdb/kdb_io.c ---- linux-4.1.26.orig/kernel/debug/kdb/kdb_io.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/debug/kdb/kdb_io.c 2016-06-19 15:30:58.687297349 +0200 -@@ -554,7 +554,6 @@ +diff --git a/kernel/debug/kdb/kdb_io.c b/kernel/debug/kdb/kdb_io.c +index fc1ef736253c..83c666537a7a 100644 +--- a/kernel/debug/kdb/kdb_io.c ++++ b/kernel/debug/kdb/kdb_io.c +@@ -554,7 +554,6 @@ int vkdb_printf(enum kdb_msgsrc src, const char *fmt, va_list ap) int linecount; int colcount; int logging, saved_loglevel = 0; @@ -14761,7 +15956,7 @@ diff -Nur linux-4.1.26.orig/kernel/debug/kdb/kdb_io.c linux-4.1.26/kernel/debug/ int got_printf_lock = 0; int retlen = 0; int fnd, len; -@@ -565,8 +564,6 @@ +@@ -565,8 +564,6 @@ int vkdb_printf(enum kdb_msgsrc src, const char *fmt, va_list ap) unsigned long uninitialized_var(flags); preempt_disable(); @@ -14770,7 +15965,7 @@ diff -Nur linux-4.1.26.orig/kernel/debug/kdb/kdb_io.c linux-4.1.26/kernel/debug/ /* Serialize kdb_printf if multiple cpus try to write at once. * But if any cpu goes recursive in kdb, just print the output, -@@ -855,7 +852,6 @@ +@@ -855,7 +852,6 @@ kdb_print_out: } else { __release(kdb_printf_lock); } @@ -14778,7 +15973,7 @@ diff -Nur linux-4.1.26.orig/kernel/debug/kdb/kdb_io.c linux-4.1.26/kernel/debug/ preempt_enable(); return retlen; } -@@ -865,9 +861,11 @@ +@@ -865,9 +861,11 @@ int kdb_printf(const char *fmt, ...) va_list ap; int r; @@ -14790,10 +15985,11 @@ diff -Nur linux-4.1.26.orig/kernel/debug/kdb/kdb_io.c linux-4.1.26/kernel/debug/ return r; } -diff -Nur linux-4.1.26.orig/kernel/events/core.c linux-4.1.26/kernel/events/core.c ---- linux-4.1.26.orig/kernel/events/core.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/events/core.c 2016-06-19 15:30:58.687297349 +0200 -@@ -6925,6 +6925,7 @@ +diff --git a/kernel/events/core.c b/kernel/events/core.c +index 6da64f0d0630..aa35b5850d36 100644 +--- a/kernel/events/core.c ++++ b/kernel/events/core.c +@@ -6925,6 +6925,7 @@ static void perf_swevent_init_hrtimer(struct perf_event *event) hrtimer_init(&hwc->hrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); hwc->hrtimer.function = perf_swevent_hrtimer; @@ -14801,10 +15997,11 @@ diff -Nur linux-4.1.26.orig/kernel/events/core.c linux-4.1.26/kernel/events/core /* * Since hrtimers have a fixed rate, we can do a static freq->period -diff -Nur linux-4.1.26.orig/kernel/exit.c linux-4.1.26/kernel/exit.c ---- linux-4.1.26.orig/kernel/exit.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/exit.c 2016-06-19 15:30:58.687297349 +0200 -@@ -144,7 +144,7 @@ +diff --git a/kernel/exit.c b/kernel/exit.c +index 819f51ec4f55..44eb884773e0 100644 +--- a/kernel/exit.c ++++ b/kernel/exit.c +@@ -144,7 +144,7 @@ static void __exit_signal(struct task_struct *tsk) * Do this under ->siglock, we can race with another thread * doing sigqueue_free() if we have SIGQUEUE_PREALLOC signals. */ @@ -14813,10 +16010,11 @@ diff -Nur linux-4.1.26.orig/kernel/exit.c linux-4.1.26/kernel/exit.c tsk->sighand = NULL; spin_unlock(&sighand->siglock); -diff -Nur linux-4.1.26.orig/kernel/fork.c linux-4.1.26/kernel/fork.c ---- linux-4.1.26.orig/kernel/fork.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/fork.c 2016-06-19 15:30:58.687297349 +0200 -@@ -108,7 +108,7 @@ +diff --git a/kernel/fork.c b/kernel/fork.c +index 8209fa2d36ef..8f8a0a13d212 100644 +--- a/kernel/fork.c ++++ b/kernel/fork.c +@@ -108,7 +108,7 @@ int max_threads; /* tunable limit on nr_threads */ DEFINE_PER_CPU(unsigned long, process_counts) = 0; @@ -14825,7 +16023,7 @@ diff -Nur linux-4.1.26.orig/kernel/fork.c linux-4.1.26/kernel/fork.c #ifdef CONFIG_PROVE_RCU int lockdep_tasklist_lock_is_held(void) -@@ -244,7 +244,9 @@ +@@ -244,7 +244,9 @@ static inline void put_signal_struct(struct signal_struct *sig) if (atomic_dec_and_test(&sig->sigcnt)) free_signal_struct(sig); } @@ -14836,7 +16034,7 @@ diff -Nur linux-4.1.26.orig/kernel/fork.c linux-4.1.26/kernel/fork.c void __put_task_struct(struct task_struct *tsk) { WARN_ON(!tsk->exit_state); -@@ -260,7 +262,18 @@ +@@ -260,7 +262,18 @@ void __put_task_struct(struct task_struct *tsk) if (!profile_handoff_task(tsk)) free_task(tsk); } @@ -14855,7 +16053,7 @@ diff -Nur linux-4.1.26.orig/kernel/fork.c linux-4.1.26/kernel/fork.c void __init __weak arch_task_cache_init(void) { } -@@ -374,6 +387,7 @@ +@@ -374,6 +387,7 @@ static struct task_struct *dup_task_struct(struct task_struct *orig) #endif tsk->splice_pipe = NULL; tsk->task_frag.page = NULL; @@ -14863,7 +16061,7 @@ diff -Nur linux-4.1.26.orig/kernel/fork.c linux-4.1.26/kernel/fork.c account_kernel_stack(ti, 1); -@@ -680,6 +694,19 @@ +@@ -680,6 +694,19 @@ void __mmdrop(struct mm_struct *mm) } EXPORT_SYMBOL_GPL(__mmdrop); @@ -14883,7 +16081,7 @@ diff -Nur linux-4.1.26.orig/kernel/fork.c linux-4.1.26/kernel/fork.c /* * Decrement the use count and release all resources for an mm. */ -@@ -1214,6 +1241,9 @@ +@@ -1214,6 +1241,9 @@ static void rt_mutex_init_task(struct task_struct *p) */ static void posix_cpu_timers_init(struct task_struct *tsk) { @@ -14893,7 +16091,7 @@ diff -Nur linux-4.1.26.orig/kernel/fork.c linux-4.1.26/kernel/fork.c tsk->cputime_expires.prof_exp = 0; tsk->cputime_expires.virt_exp = 0; tsk->cputime_expires.sched_exp = 0; -@@ -1338,6 +1368,7 @@ +@@ -1338,6 +1368,7 @@ static struct task_struct *copy_process(unsigned long clone_flags, spin_lock_init(&p->alloc_lock); init_sigpending(&p->pending); @@ -14901,7 +16099,7 @@ diff -Nur linux-4.1.26.orig/kernel/fork.c linux-4.1.26/kernel/fork.c p->utime = p->stime = p->gtime = 0; p->utimescaled = p->stimescaled = 0; -@@ -1345,7 +1376,8 @@ +@@ -1345,7 +1376,8 @@ static struct task_struct *copy_process(unsigned long clone_flags, p->prev_cputime.utime = p->prev_cputime.stime = 0; #endif #ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN @@ -14911,7 +16109,7 @@ diff -Nur linux-4.1.26.orig/kernel/fork.c linux-4.1.26/kernel/fork.c p->vtime_snap = 0; p->vtime_snap_whence = VTIME_SLEEPING; #endif -@@ -1396,6 +1428,9 @@ +@@ -1396,6 +1428,9 @@ static struct task_struct *copy_process(unsigned long clone_flags, p->hardirq_context = 0; p->softirq_context = 0; #endif @@ -14921,10 +16119,11 @@ diff -Nur linux-4.1.26.orig/kernel/fork.c linux-4.1.26/kernel/fork.c #ifdef CONFIG_LOCKDEP p->lockdep_depth = 0; /* no locks held yet */ p->curr_chain_key = 0; -diff -Nur linux-4.1.26.orig/kernel/futex.c linux-4.1.26/kernel/futex.c ---- linux-4.1.26.orig/kernel/futex.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/futex.c 2016-06-19 15:32:42.447298576 +0200 -@@ -738,7 +738,9 @@ +diff --git a/kernel/futex.c b/kernel/futex.c +index 2214b70f1910..70ba363359a5 100644 +--- a/kernel/futex.c ++++ b/kernel/futex.c +@@ -738,7 +738,9 @@ void exit_pi_state_list(struct task_struct *curr) * task still owns the PI-state: */ if (head->next != next) { @@ -14934,7 +16133,7 @@ diff -Nur linux-4.1.26.orig/kernel/futex.c linux-4.1.26/kernel/futex.c continue; } -@@ -1090,9 +1092,11 @@ +@@ -1090,9 +1092,11 @@ static void __unqueue_futex(struct futex_q *q) /* * The hash bucket lock must be held when this is called. @@ -14948,7 +16147,7 @@ diff -Nur linux-4.1.26.orig/kernel/futex.c linux-4.1.26/kernel/futex.c { struct task_struct *p = q->task; -@@ -1100,14 +1104,10 @@ +@@ -1100,14 +1104,10 @@ static void wake_futex(struct futex_q *q) return; /* @@ -14966,7 +16165,7 @@ diff -Nur linux-4.1.26.orig/kernel/futex.c linux-4.1.26/kernel/futex.c __unqueue_futex(q); /* * The waiting task can free the futex_q as soon as -@@ -1117,16 +1117,15 @@ +@@ -1117,16 +1117,15 @@ static void wake_futex(struct futex_q *q) */ smp_wmb(); q->lock_ptr = NULL; @@ -14986,7 +16185,7 @@ diff -Nur linux-4.1.26.orig/kernel/futex.c linux-4.1.26/kernel/futex.c int ret = 0; if (!pi_state) -@@ -1188,7 +1187,17 @@ +@@ -1188,7 +1187,17 @@ static int wake_futex_pi(u32 __user *uaddr, u32 uval, struct futex_q *this) raw_spin_unlock_irq(&new_owner->pi_lock); raw_spin_unlock(&pi_state->pi_mutex.wait_lock); @@ -15005,7 +16204,7 @@ diff -Nur linux-4.1.26.orig/kernel/futex.c linux-4.1.26/kernel/futex.c return 0; } -@@ -1227,6 +1236,7 @@ +@@ -1227,6 +1236,7 @@ futex_wake(u32 __user *uaddr, unsigned int flags, int nr_wake, u32 bitset) struct futex_q *this, *next; union futex_key key = FUTEX_KEY_INIT; int ret; @@ -15013,7 +16212,7 @@ diff -Nur linux-4.1.26.orig/kernel/futex.c linux-4.1.26/kernel/futex.c if (!bitset) return -EINVAL; -@@ -1254,13 +1264,14 @@ +@@ -1254,13 +1264,14 @@ futex_wake(u32 __user *uaddr, unsigned int flags, int nr_wake, u32 bitset) if (!(this->bitset & bitset)) continue; @@ -15029,7 +16228,7 @@ diff -Nur linux-4.1.26.orig/kernel/futex.c linux-4.1.26/kernel/futex.c out_put_key: put_futex_key(&key); out: -@@ -1279,6 +1290,7 @@ +@@ -1279,6 +1290,7 @@ futex_wake_op(u32 __user *uaddr1, unsigned int flags, u32 __user *uaddr2, struct futex_hash_bucket *hb1, *hb2; struct futex_q *this, *next; int ret, op_ret; @@ -15037,7 +16236,7 @@ diff -Nur linux-4.1.26.orig/kernel/futex.c linux-4.1.26/kernel/futex.c retry: ret = get_futex_key(uaddr1, flags & FLAGS_SHARED, &key1, VERIFY_READ); -@@ -1330,7 +1342,7 @@ +@@ -1330,7 +1342,7 @@ retry_private: ret = -EINVAL; goto out_unlock; } @@ -15046,7 +16245,7 @@ diff -Nur linux-4.1.26.orig/kernel/futex.c linux-4.1.26/kernel/futex.c if (++ret >= nr_wake) break; } -@@ -1344,7 +1356,7 @@ +@@ -1344,7 +1356,7 @@ retry_private: ret = -EINVAL; goto out_unlock; } @@ -15055,7 +16254,7 @@ diff -Nur linux-4.1.26.orig/kernel/futex.c linux-4.1.26/kernel/futex.c if (++op_ret >= nr_wake2) break; } -@@ -1354,6 +1366,7 @@ +@@ -1354,6 +1366,7 @@ retry_private: out_unlock: double_unlock_hb(hb1, hb2); @@ -15063,7 +16262,7 @@ diff -Nur linux-4.1.26.orig/kernel/futex.c linux-4.1.26/kernel/futex.c out_put_keys: put_futex_key(&key2); out_put_key1: -@@ -1513,6 +1526,7 @@ +@@ -1513,6 +1526,7 @@ static int futex_requeue(u32 __user *uaddr1, unsigned int flags, struct futex_pi_state *pi_state = NULL; struct futex_hash_bucket *hb1, *hb2; struct futex_q *this, *next; @@ -15071,7 +16270,7 @@ diff -Nur linux-4.1.26.orig/kernel/futex.c linux-4.1.26/kernel/futex.c if (requeue_pi) { /* -@@ -1689,7 +1703,7 @@ +@@ -1689,7 +1703,7 @@ retry_private: * woken by futex_unlock_pi(). */ if (++task_count <= nr_wake && !requeue_pi) { @@ -15080,7 +16279,7 @@ diff -Nur linux-4.1.26.orig/kernel/futex.c linux-4.1.26/kernel/futex.c continue; } -@@ -1715,6 +1729,16 @@ +@@ -1715,6 +1729,16 @@ retry_private: requeue_pi_wake_futex(this, &key2, hb2); drop_count++; continue; @@ -15097,7 +16296,7 @@ diff -Nur linux-4.1.26.orig/kernel/futex.c linux-4.1.26/kernel/futex.c } else if (ret) { /* -EDEADLK */ this->pi_state = NULL; -@@ -1729,6 +1753,7 @@ +@@ -1729,6 +1753,7 @@ retry_private: out_unlock: free_pi_state(pi_state); double_unlock_hb(hb1, hb2); @@ -15105,24 +16304,43 @@ diff -Nur linux-4.1.26.orig/kernel/futex.c linux-4.1.26/kernel/futex.c hb_waiters_dec(hb2); /* -@@ -2422,7 +2447,15 @@ +@@ -2422,13 +2447,22 @@ retry: */ match = futex_top_waiter(hb, &key); if (match) { - ret = wake_futex_pi(uaddr, uval, match); -+ ret = wake_futex_pi(uaddr, uval, match, hb); ++ ret = wake_futex_pi(uaddr, uval, match, hb); + -+ /* -+ * In case of success wake_futex_pi dropped the hash -+ * bucket lock. -+ */ -+ if (!ret) -+ goto out_putkey; ++ /* ++ * In case of success wake_futex_pi dropped the hash ++ * bucket lock. ++ */ ++ if (!ret) ++ goto out_putkey; + /* * The atomic access to the futex value generated a * pagefault, so retry the user-access and the wakeup: -@@ -2458,6 +2491,7 @@ + */ + if (ret == -EFAULT) + goto pi_faulted; ++ + /* + * A unconditional UNLOCK_PI op raced against a waiter + * setting the FUTEX_WAITERS bit. Try again. +@@ -2438,6 +2472,11 @@ retry: + put_futex_key(&key); + goto retry; + } ++ ++ /* ++ * wake_futex_pi has detected invalid state. Tell user ++ * space. ++ */ + goto out_unlock; + } + +@@ -2458,6 +2497,7 @@ retry: out_unlock: spin_unlock(&hb->lock); @@ -15130,7 +16348,7 @@ diff -Nur linux-4.1.26.orig/kernel/futex.c linux-4.1.26/kernel/futex.c put_futex_key(&key); return ret; -@@ -2568,7 +2602,7 @@ +@@ -2568,7 +2608,7 @@ static int futex_wait_requeue_pi(u32 __user *uaddr, unsigned int flags, struct hrtimer_sleeper timeout, *to = NULL; struct rt_mutex_waiter rt_waiter; struct rt_mutex *pi_mutex = NULL; @@ -15139,7 +16357,7 @@ diff -Nur linux-4.1.26.orig/kernel/futex.c linux-4.1.26/kernel/futex.c union futex_key key2 = FUTEX_KEY_INIT; struct futex_q q = futex_q_init; int res, ret; -@@ -2593,10 +2627,7 @@ +@@ -2593,10 +2633,7 @@ static int futex_wait_requeue_pi(u32 __user *uaddr, unsigned int flags, * The waiter is allocated on our stack, manipulated by the requeue * code while we sleep on uaddr. */ @@ -15151,7 +16369,7 @@ diff -Nur linux-4.1.26.orig/kernel/futex.c linux-4.1.26/kernel/futex.c ret = get_futex_key(uaddr2, flags & FLAGS_SHARED, &key2, VERIFY_WRITE); if (unlikely(ret != 0)) -@@ -2627,20 +2658,55 @@ +@@ -2627,20 +2664,55 @@ static int futex_wait_requeue_pi(u32 __user *uaddr, unsigned int flags, /* Queue the futex_q, drop the hb lock, wait for wakeup. */ futex_wait_queue_me(hb, &q, to); @@ -15218,7 +16436,7 @@ diff -Nur linux-4.1.26.orig/kernel/futex.c linux-4.1.26/kernel/futex.c /* Check if the requeue code acquired the second futex for us. */ if (!q.rt_waiter) { -@@ -2649,14 +2715,15 @@ +@@ -2649,14 +2721,15 @@ static int futex_wait_requeue_pi(u32 __user *uaddr, unsigned int flags, * did a lock-steal - fix up the PI-state in that case. */ if (q.pi_state && (q.pi_state->owner != current)) { @@ -15236,7 +16454,7 @@ diff -Nur linux-4.1.26.orig/kernel/futex.c linux-4.1.26/kernel/futex.c } } else { /* -@@ -2669,7 +2736,8 @@ +@@ -2669,7 +2742,8 @@ static int futex_wait_requeue_pi(u32 __user *uaddr, unsigned int flags, ret = rt_mutex_finish_proxy_lock(pi_mutex, to, &rt_waiter); debug_rt_mutex_free_waiter(&rt_waiter); @@ -15246,10 +16464,11 @@ diff -Nur linux-4.1.26.orig/kernel/futex.c linux-4.1.26/kernel/futex.c /* * Fixup the pi_state owner and possibly acquire the lock if we * haven't already. -diff -Nur linux-4.1.26.orig/kernel/irq/handle.c linux-4.1.26/kernel/irq/handle.c ---- linux-4.1.26.orig/kernel/irq/handle.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/irq/handle.c 2016-06-19 15:30:58.691297504 +0200 -@@ -133,6 +133,8 @@ +diff --git a/kernel/irq/handle.c b/kernel/irq/handle.c +index 635480270858..26a63672c263 100644 +--- a/kernel/irq/handle.c ++++ b/kernel/irq/handle.c +@@ -133,6 +133,8 @@ void __irq_wake_thread(struct irq_desc *desc, struct irqaction *action) irqreturn_t handle_irq_event_percpu(struct irq_desc *desc, struct irqaction *action) { @@ -15258,7 +16477,7 @@ diff -Nur linux-4.1.26.orig/kernel/irq/handle.c linux-4.1.26/kernel/irq/handle.c irqreturn_t retval = IRQ_NONE; unsigned int flags = 0, irq = desc->irq_data.irq; -@@ -173,7 +175,11 @@ +@@ -173,7 +175,11 @@ handle_irq_event_percpu(struct irq_desc *desc, struct irqaction *action) action = action->next; } while (action); @@ -15271,9 +16490,10 @@ diff -Nur linux-4.1.26.orig/kernel/irq/handle.c linux-4.1.26/kernel/irq/handle.c if (!noirqdebug) note_interrupt(irq, desc, retval); -diff -Nur linux-4.1.26.orig/kernel/irq/manage.c linux-4.1.26/kernel/irq/manage.c ---- linux-4.1.26.orig/kernel/irq/manage.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/irq/manage.c 2016-06-19 15:30:58.691297504 +0200 +diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c +index e68932bb308e..79c55c26eaee 100644 +--- a/kernel/irq/manage.c ++++ b/kernel/irq/manage.c @@ -22,6 +22,7 @@ #include "internals.h" @@ -15282,7 +16502,7 @@ diff -Nur linux-4.1.26.orig/kernel/irq/manage.c linux-4.1.26/kernel/irq/manage.c __read_mostly bool force_irqthreads; static int __init setup_forced_irqthreads(char *arg) -@@ -30,6 +31,7 @@ +@@ -30,6 +31,7 @@ static int __init setup_forced_irqthreads(char *arg) return 0; } early_param("threadirqs", setup_forced_irqthreads); @@ -15290,7 +16510,7 @@ diff -Nur linux-4.1.26.orig/kernel/irq/manage.c linux-4.1.26/kernel/irq/manage.c #endif static void __synchronize_hardirq(struct irq_desc *desc) -@@ -179,6 +181,62 @@ +@@ -179,6 +181,62 @@ static inline void irq_get_pending(struct cpumask *mask, struct irq_desc *desc) { } #endif @@ -15353,7 +16573,7 @@ diff -Nur linux-4.1.26.orig/kernel/irq/manage.c linux-4.1.26/kernel/irq/manage.c int irq_do_set_affinity(struct irq_data *data, const struct cpumask *mask, bool force) { -@@ -218,7 +276,17 @@ +@@ -218,7 +276,17 @@ int irq_set_affinity_locked(struct irq_data *data, const struct cpumask *mask, if (desc->affinity_notify) { kref_get(&desc->affinity_notify->kref); @@ -15371,7 +16591,7 @@ diff -Nur linux-4.1.26.orig/kernel/irq/manage.c linux-4.1.26/kernel/irq/manage.c } irqd_set(data, IRQD_AFFINITY_SET); -@@ -256,10 +324,8 @@ +@@ -256,10 +324,8 @@ int irq_set_affinity_hint(unsigned int irq, const struct cpumask *m) } EXPORT_SYMBOL_GPL(irq_set_affinity_hint); @@ -15383,7 +16603,7 @@ diff -Nur linux-4.1.26.orig/kernel/irq/manage.c linux-4.1.26/kernel/irq/manage.c struct irq_desc *desc = irq_to_desc(notify->irq); cpumask_var_t cpumask; unsigned long flags; -@@ -281,6 +347,13 @@ +@@ -281,6 +347,13 @@ out: kref_put(¬ify->kref, notify->release); } @@ -15397,7 +16617,7 @@ diff -Nur linux-4.1.26.orig/kernel/irq/manage.c linux-4.1.26/kernel/irq/manage.c /** * irq_set_affinity_notifier - control notification of IRQ affinity changes * @irq: Interrupt for which to enable/disable notification -@@ -310,6 +383,8 @@ +@@ -310,6 +383,8 @@ irq_set_affinity_notifier(unsigned int irq, struct irq_affinity_notify *notify) notify->irq = irq; kref_init(¬ify->kref); INIT_WORK(¬ify->work, irq_affinity_notify); @@ -15406,7 +16626,7 @@ diff -Nur linux-4.1.26.orig/kernel/irq/manage.c linux-4.1.26/kernel/irq/manage.c } raw_spin_lock_irqsave(&desc->lock, flags); -@@ -697,6 +772,12 @@ +@@ -697,6 +772,12 @@ static irqreturn_t irq_nested_primary_handler(int irq, void *dev_id) return IRQ_NONE; } @@ -15419,7 +16639,7 @@ diff -Nur linux-4.1.26.orig/kernel/irq/manage.c linux-4.1.26/kernel/irq/manage.c static int irq_wait_for_interrupt(struct irqaction *action) { set_current_state(TASK_INTERRUPTIBLE); -@@ -723,7 +804,8 @@ +@@ -723,7 +804,8 @@ static int irq_wait_for_interrupt(struct irqaction *action) static void irq_finalize_oneshot(struct irq_desc *desc, struct irqaction *action) { @@ -15429,7 +16649,7 @@ diff -Nur linux-4.1.26.orig/kernel/irq/manage.c linux-4.1.26/kernel/irq/manage.c return; again: chip_bus_lock(desc); -@@ -825,7 +907,15 @@ +@@ -825,7 +907,15 @@ irq_forced_thread_fn(struct irq_desc *desc, struct irqaction *action) local_bh_disable(); ret = action->thread_fn(action->irq, action->dev_id); irq_finalize_oneshot(desc, action); @@ -15446,7 +16666,7 @@ diff -Nur linux-4.1.26.orig/kernel/irq/manage.c linux-4.1.26/kernel/irq/manage.c return ret; } -@@ -877,6 +967,18 @@ +@@ -877,6 +967,18 @@ static void irq_thread_dtor(struct callback_head *unused) irq_finalize_oneshot(desc, action); } @@ -15465,13 +16685,14 @@ diff -Nur linux-4.1.26.orig/kernel/irq/manage.c linux-4.1.26/kernel/irq/manage.c /* * Interrupt handler thread */ -@@ -907,7 +1009,15 @@ +@@ -907,7 +1009,15 @@ static int irq_thread(void *data) action_ret = handler_fn(desc, action); if (action_ret == IRQ_HANDLED) atomic_inc(&desc->threads_handled); +- + if (action_ret == IRQ_WAKE_THREAD) + irq_wake_secondary(desc, action); - ++ +#ifdef CONFIG_PREEMPT_RT_FULL + migrate_disable(); + add_interrupt_randomness(action->irq, 0, @@ -15481,7 +16702,7 @@ diff -Nur linux-4.1.26.orig/kernel/irq/manage.c linux-4.1.26/kernel/irq/manage.c wake_threads_waitq(desc); } -@@ -951,20 +1061,36 @@ +@@ -951,20 +1061,36 @@ void irq_wake_thread(unsigned int irq, void *dev_id) } EXPORT_SYMBOL_GPL(irq_wake_thread); @@ -15501,7 +16722,6 @@ diff -Nur linux-4.1.26.orig/kernel/irq/manage.c linux-4.1.26/kernel/irq/manage.c - set_bit(IRQTF_FORCED_THREAD, &new->thread_flags); - new->thread_fn = new->handler; - new->handler = irq_default_primary_handler; -- } + /* + * Handle the case where we have a real primary handler and a + * thread handler. We force thread them as well by creating a @@ -15517,7 +16737,7 @@ diff -Nur linux-4.1.26.orig/kernel/irq/manage.c linux-4.1.26/kernel/irq/manage.c + new->secondary->dev_id = new->dev_id; + new->secondary->irq = new->irq; + new->secondary->name = new->name; -+ } + } + /* Deal with the primary handler */ + set_bit(IRQTF_FORCED_THREAD, &new->thread_flags); + new->thread_fn = new->handler; @@ -15526,7 +16746,7 @@ diff -Nur linux-4.1.26.orig/kernel/irq/manage.c linux-4.1.26/kernel/irq/manage.c } static int irq_request_resources(struct irq_desc *desc) -@@ -984,6 +1110,48 @@ +@@ -984,6 +1110,48 @@ static void irq_release_resources(struct irq_desc *desc) c->irq_release_resources(d); } @@ -15575,7 +16795,7 @@ diff -Nur linux-4.1.26.orig/kernel/irq/manage.c linux-4.1.26/kernel/irq/manage.c /* * Internal function to register an irqaction - typically used to * allocate special interrupts that are part of the architecture. -@@ -1004,6 +1172,8 @@ +@@ -1004,6 +1172,8 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new) if (!try_module_get(desc->owner)) return -ENODEV; @@ -15584,7 +16804,7 @@ diff -Nur linux-4.1.26.orig/kernel/irq/manage.c linux-4.1.26/kernel/irq/manage.c /* * Check whether the interrupt nests into another interrupt * thread. -@@ -1021,8 +1191,11 @@ +@@ -1021,8 +1191,11 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new) */ new->handler = irq_nested_primary_handler; } else { @@ -15598,7 +16818,7 @@ diff -Nur linux-4.1.26.orig/kernel/irq/manage.c linux-4.1.26/kernel/irq/manage.c } /* -@@ -1031,37 +1204,14 @@ +@@ -1031,37 +1204,14 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new) * thread. */ if (new->thread_fn && !nested) { @@ -15642,7 +16862,7 @@ diff -Nur linux-4.1.26.orig/kernel/irq/manage.c linux-4.1.26/kernel/irq/manage.c } if (!alloc_cpumask_var(&mask, GFP_KERNEL)) { -@@ -1221,6 +1371,9 @@ +@@ -1221,6 +1371,9 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new) irqd_set(&desc->irq_data, IRQD_NO_BALANCING); } @@ -15652,7 +16872,7 @@ diff -Nur linux-4.1.26.orig/kernel/irq/manage.c linux-4.1.26/kernel/irq/manage.c /* Set default affinity mask once everything is setup */ setup_affinity(irq, desc, mask); -@@ -1234,7 +1387,6 @@ +@@ -1234,7 +1387,6 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new) irq, nmsk, omsk); } @@ -15660,7 +16880,7 @@ diff -Nur linux-4.1.26.orig/kernel/irq/manage.c linux-4.1.26/kernel/irq/manage.c *old_ptr = new; irq_pm_install_action(desc, new); -@@ -1260,6 +1412,8 @@ +@@ -1260,6 +1412,8 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new) */ if (new->thread) wake_up_process(new->thread); @@ -15669,7 +16889,7 @@ diff -Nur linux-4.1.26.orig/kernel/irq/manage.c linux-4.1.26/kernel/irq/manage.c register_irq_proc(irq, desc); new->dir = NULL; -@@ -1290,6 +1444,13 @@ +@@ -1290,6 +1444,13 @@ out_thread: kthread_stop(t); put_task_struct(t); } @@ -15683,7 +16903,7 @@ diff -Nur linux-4.1.26.orig/kernel/irq/manage.c linux-4.1.26/kernel/irq/manage.c out_mput: module_put(desc->owner); return ret; -@@ -1397,9 +1558,14 @@ +@@ -1397,9 +1558,14 @@ static struct irqaction *__free_irq(unsigned int irq, void *dev_id) if (action->thread) { kthread_stop(action->thread); put_task_struct(action->thread); @@ -15698,7 +16918,7 @@ diff -Nur linux-4.1.26.orig/kernel/irq/manage.c linux-4.1.26/kernel/irq/manage.c return action; } -@@ -1543,8 +1709,10 @@ +@@ -1543,8 +1709,10 @@ int request_threaded_irq(unsigned int irq, irq_handler_t handler, retval = __setup_irq(irq, desc, action); chip_bus_sync_unlock(desc); @@ -15710,10 +16930,11 @@ diff -Nur linux-4.1.26.orig/kernel/irq/manage.c linux-4.1.26/kernel/irq/manage.c #ifdef CONFIG_DEBUG_SHIRQ_FIXME if (!retval && (irqflags & IRQF_SHARED)) { -diff -Nur linux-4.1.26.orig/kernel/irq/settings.h linux-4.1.26/kernel/irq/settings.h ---- linux-4.1.26.orig/kernel/irq/settings.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/irq/settings.h 2016-06-19 15:30:58.691297504 +0200 -@@ -15,6 +15,7 @@ +diff --git a/kernel/irq/settings.h b/kernel/irq/settings.h +index 3320b84cc60f..34b803b89d41 100644 +--- a/kernel/irq/settings.h ++++ b/kernel/irq/settings.h +@@ -15,6 +15,7 @@ enum { _IRQ_NESTED_THREAD = IRQ_NESTED_THREAD, _IRQ_PER_CPU_DEVID = IRQ_PER_CPU_DEVID, _IRQ_IS_POLLED = IRQ_IS_POLLED, @@ -15721,7 +16942,7 @@ diff -Nur linux-4.1.26.orig/kernel/irq/settings.h linux-4.1.26/kernel/irq/settin _IRQF_MODIFY_MASK = IRQF_MODIFY_MASK, }; -@@ -28,6 +29,7 @@ +@@ -28,6 +29,7 @@ enum { #define IRQ_NESTED_THREAD GOT_YOU_MORON #define IRQ_PER_CPU_DEVID GOT_YOU_MORON #define IRQ_IS_POLLED GOT_YOU_MORON @@ -15729,7 +16950,7 @@ diff -Nur linux-4.1.26.orig/kernel/irq/settings.h linux-4.1.26/kernel/irq/settin #undef IRQF_MODIFY_MASK #define IRQF_MODIFY_MASK GOT_YOU_MORON -@@ -38,6 +40,16 @@ +@@ -38,6 +40,16 @@ irq_settings_clr_and_set(struct irq_desc *desc, u32 clr, u32 set) desc->status_use_accessors |= (set & _IRQF_MODIFY_MASK); } @@ -15746,10 +16967,11 @@ diff -Nur linux-4.1.26.orig/kernel/irq/settings.h linux-4.1.26/kernel/irq/settin static inline bool irq_settings_is_per_cpu(struct irq_desc *desc) { return desc->status_use_accessors & _IRQ_PER_CPU; -diff -Nur linux-4.1.26.orig/kernel/irq/spurious.c linux-4.1.26/kernel/irq/spurious.c ---- linux-4.1.26.orig/kernel/irq/spurious.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/irq/spurious.c 2016-06-19 15:30:58.691297504 +0200 -@@ -444,6 +444,10 @@ +diff --git a/kernel/irq/spurious.c b/kernel/irq/spurious.c +index e2514b0e439e..903a69c45689 100644 +--- a/kernel/irq/spurious.c ++++ b/kernel/irq/spurious.c +@@ -444,6 +444,10 @@ MODULE_PARM_DESC(noirqdebug, "Disable irq lockup detection when true"); static int __init irqfixup_setup(char *str) { @@ -15760,7 +16982,7 @@ diff -Nur linux-4.1.26.orig/kernel/irq/spurious.c linux-4.1.26/kernel/irq/spurio irqfixup = 1; printk(KERN_WARNING "Misrouted IRQ fixup support enabled.\n"); printk(KERN_WARNING "This may impact system performance.\n"); -@@ -456,6 +460,10 @@ +@@ -456,6 +460,10 @@ module_param(irqfixup, int, 0644); static int __init irqpoll_setup(char *str) { @@ -15771,9 +16993,10 @@ diff -Nur linux-4.1.26.orig/kernel/irq/spurious.c linux-4.1.26/kernel/irq/spurio irqfixup = 2; printk(KERN_WARNING "Misrouted IRQ fixup and polling support " "enabled\n"); -diff -Nur linux-4.1.26.orig/kernel/irq_work.c linux-4.1.26/kernel/irq_work.c ---- linux-4.1.26.orig/kernel/irq_work.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/irq_work.c 2016-06-19 15:30:58.691297504 +0200 +diff --git a/kernel/irq_work.c b/kernel/irq_work.c +index cbf9fb899d92..58cf46638ca0 100644 +--- a/kernel/irq_work.c ++++ b/kernel/irq_work.c @@ -17,6 +17,7 @@ #include <linux/cpu.h> #include <linux/notifier.h> @@ -15782,7 +17005,7 @@ diff -Nur linux-4.1.26.orig/kernel/irq_work.c linux-4.1.26/kernel/irq_work.c #include <asm/processor.h> -@@ -65,6 +66,8 @@ +@@ -65,6 +66,8 @@ void __weak arch_irq_work_raise(void) */ bool irq_work_queue_on(struct irq_work *work, int cpu) { @@ -15791,7 +17014,7 @@ diff -Nur linux-4.1.26.orig/kernel/irq_work.c linux-4.1.26/kernel/irq_work.c /* All work should have been flushed before going offline */ WARN_ON_ONCE(cpu_is_offline(cpu)); -@@ -75,7 +78,12 @@ +@@ -75,7 +78,12 @@ bool irq_work_queue_on(struct irq_work *work, int cpu) if (!irq_work_claim(work)) return false; @@ -15805,7 +17028,7 @@ diff -Nur linux-4.1.26.orig/kernel/irq_work.c linux-4.1.26/kernel/irq_work.c arch_send_call_function_single_ipi(cpu); return true; -@@ -86,6 +94,9 @@ +@@ -86,6 +94,9 @@ EXPORT_SYMBOL_GPL(irq_work_queue_on); /* Enqueue the irq work @work on the current CPU */ bool irq_work_queue(struct irq_work *work) { @@ -15815,7 +17038,7 @@ diff -Nur linux-4.1.26.orig/kernel/irq_work.c linux-4.1.26/kernel/irq_work.c /* Only queue if not already pending */ if (!irq_work_claim(work)) return false; -@@ -93,13 +104,15 @@ +@@ -93,13 +104,15 @@ bool irq_work_queue(struct irq_work *work) /* Queue the entry and raise the IPI if needed. */ preempt_disable(); @@ -15838,7 +17061,7 @@ diff -Nur linux-4.1.26.orig/kernel/irq_work.c linux-4.1.26/kernel/irq_work.c arch_irq_work_raise(); } -@@ -116,9 +129,8 @@ +@@ -116,9 +129,8 @@ bool irq_work_needs_cpu(void) raised = this_cpu_ptr(&raised_list); lazy = this_cpu_ptr(&lazy_list); @@ -15850,7 +17073,7 @@ diff -Nur linux-4.1.26.orig/kernel/irq_work.c linux-4.1.26/kernel/irq_work.c /* All work should have been flushed before going offline */ WARN_ON_ONCE(cpu_is_offline(smp_processor_id())); -@@ -132,7 +144,7 @@ +@@ -132,7 +144,7 @@ static void irq_work_run_list(struct llist_head *list) struct irq_work *work; struct llist_node *llnode; @@ -15859,7 +17082,7 @@ diff -Nur linux-4.1.26.orig/kernel/irq_work.c linux-4.1.26/kernel/irq_work.c if (llist_empty(list)) return; -@@ -169,7 +181,16 @@ +@@ -169,7 +181,16 @@ static void irq_work_run_list(struct llist_head *list) void irq_work_run(void) { irq_work_run_list(this_cpu_ptr(&raised_list)); @@ -15877,7 +17100,7 @@ diff -Nur linux-4.1.26.orig/kernel/irq_work.c linux-4.1.26/kernel/irq_work.c } EXPORT_SYMBOL_GPL(irq_work_run); -@@ -179,8 +200,17 @@ +@@ -179,8 +200,17 @@ void irq_work_tick(void) if (!llist_empty(raised) && !arch_irq_work_has_interrupt()) irq_work_run_list(raised); @@ -15895,82 +17118,11 @@ diff -Nur linux-4.1.26.orig/kernel/irq_work.c linux-4.1.26/kernel/irq_work.c /* * Synchronize against the irq_work @entry, ensures the entry is not -diff -Nur linux-4.1.26.orig/kernel/Kconfig.locks linux-4.1.26/kernel/Kconfig.locks ---- linux-4.1.26.orig/kernel/Kconfig.locks 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/Kconfig.locks 2016-06-19 15:30:58.683297195 +0200 -@@ -225,11 +225,11 @@ - - config MUTEX_SPIN_ON_OWNER - def_bool y -- depends on SMP && !DEBUG_MUTEXES && ARCH_SUPPORTS_ATOMIC_RMW -+ depends on SMP && !DEBUG_MUTEXES && ARCH_SUPPORTS_ATOMIC_RMW && !PREEMPT_RT_FULL - - config RWSEM_SPIN_ON_OWNER - def_bool y -- depends on SMP && RWSEM_XCHGADD_ALGORITHM && ARCH_SUPPORTS_ATOMIC_RMW -+ depends on SMP && RWSEM_XCHGADD_ALGORITHM && ARCH_SUPPORTS_ATOMIC_RMW && !PREEMPT_RT_FULL - - config LOCK_SPIN_ON_OWNER - def_bool y -diff -Nur linux-4.1.26.orig/kernel/Kconfig.preempt linux-4.1.26/kernel/Kconfig.preempt ---- linux-4.1.26.orig/kernel/Kconfig.preempt 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/Kconfig.preempt 2016-06-19 15:30:58.683297195 +0200 -@@ -1,3 +1,16 @@ -+config PREEMPT -+ bool -+ select PREEMPT_COUNT -+ -+config PREEMPT_RT_BASE -+ bool -+ select PREEMPT -+ -+config HAVE_PREEMPT_LAZY -+ bool -+ -+config PREEMPT_LAZY -+ def_bool y if HAVE_PREEMPT_LAZY && PREEMPT_RT_FULL - - choice - prompt "Preemption Model" -@@ -33,9 +46,9 @@ - - Select this if you are building a kernel for a desktop system. - --config PREEMPT -+config PREEMPT__LL - bool "Preemptible Kernel (Low-Latency Desktop)" -- select PREEMPT_COUNT -+ select PREEMPT - select UNINLINE_SPIN_UNLOCK if !ARCH_INLINE_SPIN_UNLOCK - help - This option reduces the latency of the kernel by making -@@ -52,6 +65,22 @@ - embedded system with latency requirements in the milliseconds - range. - -+config PREEMPT_RTB -+ bool "Preemptible Kernel (Basic RT)" -+ select PREEMPT_RT_BASE -+ help -+ This option is basically the same as (Low-Latency Desktop) but -+ enables changes which are preliminary for the full preemptible -+ RT kernel. -+ -+config PREEMPT_RT_FULL -+ bool "Fully Preemptible Kernel (RT)" -+ depends on IRQ_FORCED_THREADING -+ select PREEMPT_RT_BASE -+ select PREEMPT_RCU -+ help -+ All and everything -+ - endchoice - - config PREEMPT_COUNT -diff -Nur linux-4.1.26.orig/kernel/ksysfs.c linux-4.1.26/kernel/ksysfs.c ---- linux-4.1.26.orig/kernel/ksysfs.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/ksysfs.c 2016-06-19 15:30:58.691297504 +0200 -@@ -136,6 +136,15 @@ +diff --git a/kernel/ksysfs.c b/kernel/ksysfs.c +index 6683ccef9fff..d6fc8eeaab8f 100644 +--- a/kernel/ksysfs.c ++++ b/kernel/ksysfs.c +@@ -136,6 +136,15 @@ KERNEL_ATTR_RO(vmcoreinfo); #endif /* CONFIG_KEXEC */ @@ -15986,7 +17138,7 @@ diff -Nur linux-4.1.26.orig/kernel/ksysfs.c linux-4.1.26/kernel/ksysfs.c /* whether file capabilities are enabled */ static ssize_t fscaps_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf) -@@ -203,6 +212,9 @@ +@@ -203,6 +212,9 @@ static struct attribute * kernel_attrs[] = { &vmcoreinfo_attr.attr, #endif &rcu_expedited_attr.attr, @@ -15996,9 +17148,45 @@ diff -Nur linux-4.1.26.orig/kernel/ksysfs.c linux-4.1.26/kernel/ksysfs.c NULL }; -diff -Nur linux-4.1.26.orig/kernel/locking/lglock.c linux-4.1.26/kernel/locking/lglock.c ---- linux-4.1.26.orig/kernel/locking/lglock.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/locking/lglock.c 2016-06-19 15:30:58.691297504 +0200 +diff --git a/kernel/locking/Makefile b/kernel/locking/Makefile +index de7a416cca2a..ab269cf0475a 100644 +--- a/kernel/locking/Makefile ++++ b/kernel/locking/Makefile +@@ -1,5 +1,5 @@ + +-obj-y += mutex.o semaphore.o rwsem.o ++obj-y += semaphore.o + + ifdef CONFIG_FUNCTION_TRACER + CFLAGS_REMOVE_lockdep.o = $(CC_FLAGS_FTRACE) +@@ -8,7 +8,11 @@ CFLAGS_REMOVE_mutex-debug.o = $(CC_FLAGS_FTRACE) + CFLAGS_REMOVE_rtmutex-debug.o = $(CC_FLAGS_FTRACE) + endif + ++ifneq ($(CONFIG_PREEMPT_RT_FULL),y) ++obj-y += mutex.o + obj-$(CONFIG_DEBUG_MUTEXES) += mutex-debug.o ++obj-y += rwsem.o ++endif + obj-$(CONFIG_LOCKDEP) += lockdep.o + ifeq ($(CONFIG_PROC_FS),y) + obj-$(CONFIG_LOCKDEP) += lockdep_proc.o +@@ -22,8 +26,11 @@ obj-$(CONFIG_DEBUG_RT_MUTEXES) += rtmutex-debug.o + obj-$(CONFIG_RT_MUTEX_TESTER) += rtmutex-tester.o + obj-$(CONFIG_DEBUG_SPINLOCK) += spinlock.o + obj-$(CONFIG_DEBUG_SPINLOCK) += spinlock_debug.o ++ifneq ($(CONFIG_PREEMPT_RT_FULL),y) + obj-$(CONFIG_RWSEM_GENERIC_SPINLOCK) += rwsem-spinlock.o + obj-$(CONFIG_RWSEM_XCHGADD_ALGORITHM) += rwsem-xadd.o ++endif + obj-$(CONFIG_PERCPU_RWSEM) += percpu-rwsem.o ++obj-$(CONFIG_PREEMPT_RT_FULL) += rt.o + obj-$(CONFIG_QUEUE_RWLOCK) += qrwlock.o + obj-$(CONFIG_LOCK_TORTURE_TEST) += locktorture.o +diff --git a/kernel/locking/lglock.c b/kernel/locking/lglock.c +index 86ae2aebf004..9397974b142f 100644 +--- a/kernel/locking/lglock.c ++++ b/kernel/locking/lglock.c @@ -4,6 +4,15 @@ #include <linux/cpu.h> #include <linux/string.h> @@ -16088,7 +17276,7 @@ diff -Nur linux-4.1.26.orig/kernel/locking/lglock.c linux-4.1.26/kernel/locking/ } EXPORT_SYMBOL(lg_local_unlock_cpu); -@@ -64,12 +82,12 @@ +@@ -64,12 +82,12 @@ void lg_global_lock(struct lglock *lg) { int i; @@ -16104,7 +17292,7 @@ diff -Nur linux-4.1.26.orig/kernel/locking/lglock.c linux-4.1.26/kernel/locking/ } } EXPORT_SYMBOL(lg_global_lock); -@@ -80,10 +98,35 @@ +@@ -80,10 +98,35 @@ void lg_global_unlock(struct lglock *lg) lock_release(&lg->lock_dep_map, 1, _RET_IP_); for_each_possible_cpu(i) { @@ -16143,10 +17331,11 @@ diff -Nur linux-4.1.26.orig/kernel/locking/lglock.c linux-4.1.26/kernel/locking/ + } +} +#endif -diff -Nur linux-4.1.26.orig/kernel/locking/lockdep.c linux-4.1.26/kernel/locking/lockdep.c ---- linux-4.1.26.orig/kernel/locking/lockdep.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/locking/lockdep.c 2016-06-19 15:30:58.691297504 +0200 -@@ -3563,6 +3563,7 @@ +diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c +index aaeae885d9af..577f02617c63 100644 +--- a/kernel/locking/lockdep.c ++++ b/kernel/locking/lockdep.c +@@ -3563,6 +3563,7 @@ static void check_flags(unsigned long flags) } } @@ -16154,7 +17343,7 @@ diff -Nur linux-4.1.26.orig/kernel/locking/lockdep.c linux-4.1.26/kernel/locking /* * We dont accurately track softirq state in e.g. * hardirq contexts (such as on 4KSTACKS), so only -@@ -3577,6 +3578,7 @@ +@@ -3577,6 +3578,7 @@ static void check_flags(unsigned long flags) DEBUG_LOCKS_WARN_ON(!current->softirqs_enabled); } } @@ -16162,9 +17351,10 @@ diff -Nur linux-4.1.26.orig/kernel/locking/lockdep.c linux-4.1.26/kernel/locking if (!debug_locks) print_irqtrace_events(current); -diff -Nur linux-4.1.26.orig/kernel/locking/locktorture.c linux-4.1.26/kernel/locking/locktorture.c ---- linux-4.1.26.orig/kernel/locking/locktorture.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/locking/locktorture.c 2016-06-19 15:30:58.695297658 +0200 +diff --git a/kernel/locking/locktorture.c b/kernel/locking/locktorture.c +index ec8cce259779..aa60d919e336 100644 +--- a/kernel/locking/locktorture.c ++++ b/kernel/locking/locktorture.c @@ -24,7 +24,6 @@ #include <linux/module.h> #include <linux/kthread.h> @@ -16173,43 +17363,11 @@ diff -Nur linux-4.1.26.orig/kernel/locking/locktorture.c linux-4.1.26/kernel/loc #include <linux/mutex.h> #include <linux/rwsem.h> #include <linux/smp.h> -diff -Nur linux-4.1.26.orig/kernel/locking/Makefile linux-4.1.26/kernel/locking/Makefile ---- linux-4.1.26.orig/kernel/locking/Makefile 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/locking/Makefile 2016-06-19 15:30:58.691297504 +0200 -@@ -1,5 +1,5 @@ - --obj-y += mutex.o semaphore.o rwsem.o -+obj-y += semaphore.o - - ifdef CONFIG_FUNCTION_TRACER - CFLAGS_REMOVE_lockdep.o = $(CC_FLAGS_FTRACE) -@@ -8,7 +8,11 @@ - CFLAGS_REMOVE_rtmutex-debug.o = $(CC_FLAGS_FTRACE) - endif - -+ifneq ($(CONFIG_PREEMPT_RT_FULL),y) -+obj-y += mutex.o - obj-$(CONFIG_DEBUG_MUTEXES) += mutex-debug.o -+obj-y += rwsem.o -+endif - obj-$(CONFIG_LOCKDEP) += lockdep.o - ifeq ($(CONFIG_PROC_FS),y) - obj-$(CONFIG_LOCKDEP) += lockdep_proc.o -@@ -22,8 +26,11 @@ - obj-$(CONFIG_RT_MUTEX_TESTER) += rtmutex-tester.o - obj-$(CONFIG_DEBUG_SPINLOCK) += spinlock.o - obj-$(CONFIG_DEBUG_SPINLOCK) += spinlock_debug.o -+ifneq ($(CONFIG_PREEMPT_RT_FULL),y) - obj-$(CONFIG_RWSEM_GENERIC_SPINLOCK) += rwsem-spinlock.o - obj-$(CONFIG_RWSEM_XCHGADD_ALGORITHM) += rwsem-xadd.o -+endif - obj-$(CONFIG_PERCPU_RWSEM) += percpu-rwsem.o -+obj-$(CONFIG_PREEMPT_RT_FULL) += rt.o - obj-$(CONFIG_QUEUE_RWLOCK) += qrwlock.o - obj-$(CONFIG_LOCK_TORTURE_TEST) += locktorture.o -diff -Nur linux-4.1.26.orig/kernel/locking/rt.c linux-4.1.26/kernel/locking/rt.c ---- linux-4.1.26.orig/kernel/locking/rt.c 1970-01-01 01:00:00.000000000 +0100 -+++ linux-4.1.26/kernel/locking/rt.c 2016-06-19 15:30:58.695297658 +0200 +diff --git a/kernel/locking/rt.c b/kernel/locking/rt.c +new file mode 100644 +index 000000000000..c236efa4834c +--- /dev/null ++++ b/kernel/locking/rt.c @@ -0,0 +1,461 @@ +/* + * kernel/rt.c @@ -16672,9 +17830,10 @@ diff -Nur linux-4.1.26.orig/kernel/locking/rt.c linux-4.1.26/kernel/locking/rt.c + return 1; +} +EXPORT_SYMBOL(atomic_dec_and_mutex_lock); -diff -Nur linux-4.1.26.orig/kernel/locking/rtmutex.c linux-4.1.26/kernel/locking/rtmutex.c ---- linux-4.1.26.orig/kernel/locking/rtmutex.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/locking/rtmutex.c 2016-06-19 15:30:58.695297658 +0200 +diff --git a/kernel/locking/rtmutex.c b/kernel/locking/rtmutex.c +index b025295f4966..e0b0d9b419b5 100644 +--- a/kernel/locking/rtmutex.c ++++ b/kernel/locking/rtmutex.c @@ -7,6 +7,11 @@ * Copyright (C) 2005-2006 Timesys Corp., Thomas Gleixner <tglx@timesys.com> * Copyright (C) 2005 Kihon Technologies Inc., Steven Rostedt @@ -16695,7 +17854,7 @@ diff -Nur linux-4.1.26.orig/kernel/locking/rtmutex.c linux-4.1.26/kernel/locking #include "rtmutex_common.h" -@@ -69,6 +75,12 @@ +@@ -69,6 +75,12 @@ static void fixup_rt_mutex_waiters(struct rt_mutex *lock) clear_rt_mutex_waiters(lock); } @@ -16708,7 +17867,7 @@ diff -Nur linux-4.1.26.orig/kernel/locking/rtmutex.c linux-4.1.26/kernel/locking /* * We can speed up the acquire/release, if the architecture * supports cmpxchg and if there's no debugging state to be set up -@@ -300,7 +312,7 @@ +@@ -300,7 +312,7 @@ static void __rt_mutex_adjust_prio(struct task_struct *task) * of task. We do not use the spin_xx_mutex() variants here as we are * outside of the debug path.) */ @@ -16717,7 +17876,7 @@ diff -Nur linux-4.1.26.orig/kernel/locking/rtmutex.c linux-4.1.26/kernel/locking { unsigned long flags; -@@ -335,6 +347,14 @@ +@@ -335,6 +347,14 @@ static bool rt_mutex_cond_detect_deadlock(struct rt_mutex_waiter *waiter, return debug_rt_mutex_detect_deadlock(waiter, chwalk); } @@ -16732,7 +17891,7 @@ diff -Nur linux-4.1.26.orig/kernel/locking/rtmutex.c linux-4.1.26/kernel/locking /* * Max number of times we'll walk the boosting chain: */ -@@ -342,7 +362,8 @@ +@@ -342,7 +362,8 @@ int max_lock_depth = 1024; static inline struct rt_mutex *task_blocked_on_lock(struct task_struct *p) { @@ -16742,7 +17901,7 @@ diff -Nur linux-4.1.26.orig/kernel/locking/rtmutex.c linux-4.1.26/kernel/locking } /* -@@ -479,7 +500,7 @@ +@@ -479,7 +500,7 @@ static int rt_mutex_adjust_prio_chain(struct task_struct *task, * reached or the state of the chain has changed while we * dropped the locks. */ @@ -16751,7 +17910,7 @@ diff -Nur linux-4.1.26.orig/kernel/locking/rtmutex.c linux-4.1.26/kernel/locking goto out_unlock_pi; /* -@@ -641,13 +662,16 @@ +@@ -641,13 +662,16 @@ static int rt_mutex_adjust_prio_chain(struct task_struct *task, * follow here. This is the end of the chain we are walking. */ if (!rt_mutex_owner(lock)) { @@ -16770,7 +17929,7 @@ diff -Nur linux-4.1.26.orig/kernel/locking/rtmutex.c linux-4.1.26/kernel/locking raw_spin_unlock(&lock->wait_lock); return 0; } -@@ -740,6 +764,25 @@ +@@ -740,6 +764,25 @@ static int rt_mutex_adjust_prio_chain(struct task_struct *task, return ret; } @@ -16796,7 +17955,7 @@ diff -Nur linux-4.1.26.orig/kernel/locking/rtmutex.c linux-4.1.26/kernel/locking /* * Try to take an rt-mutex * -@@ -750,8 +793,9 @@ +@@ -750,8 +793,9 @@ static int rt_mutex_adjust_prio_chain(struct task_struct *task, * @waiter: The waiter that is queued to the lock's wait list if the * callsite called task_blocked_on_lock(), otherwise NULL */ @@ -16808,7 +17967,7 @@ diff -Nur linux-4.1.26.orig/kernel/locking/rtmutex.c linux-4.1.26/kernel/locking { unsigned long flags; -@@ -790,8 +834,10 @@ +@@ -790,8 +834,10 @@ static int try_to_take_rt_mutex(struct rt_mutex *lock, struct task_struct *task, * If waiter is not the highest priority waiter of * @lock, give up. */ @@ -16820,7 +17979,7 @@ diff -Nur linux-4.1.26.orig/kernel/locking/rtmutex.c linux-4.1.26/kernel/locking /* * We can acquire the lock. Remove the waiter from the -@@ -809,14 +855,10 @@ +@@ -809,14 +855,10 @@ static int try_to_take_rt_mutex(struct rt_mutex *lock, struct task_struct *task, * not need to be dequeued. */ if (rt_mutex_has_waiters(lock)) { @@ -16838,7 +17997,7 @@ diff -Nur linux-4.1.26.orig/kernel/locking/rtmutex.c linux-4.1.26/kernel/locking /* * The current top waiter stays enqueued. We * don't have to change anything in the lock -@@ -865,6 +907,347 @@ +@@ -865,6 +907,347 @@ takeit: return 1; } @@ -17186,7 +18345,7 @@ diff -Nur linux-4.1.26.orig/kernel/locking/rtmutex.c linux-4.1.26/kernel/locking /* * Task blocks on lock. * -@@ -896,6 +1279,23 @@ +@@ -896,6 +1279,23 @@ static int task_blocks_on_rt_mutex(struct rt_mutex *lock, return -EDEADLK; raw_spin_lock_irqsave(&task->pi_lock, flags); @@ -17210,7 +18369,7 @@ diff -Nur linux-4.1.26.orig/kernel/locking/rtmutex.c linux-4.1.26/kernel/locking __rt_mutex_adjust_prio(task); waiter->task = task; waiter->lock = lock; -@@ -919,7 +1319,7 @@ +@@ -919,7 +1319,7 @@ static int task_blocks_on_rt_mutex(struct rt_mutex *lock, rt_mutex_enqueue_pi(owner, waiter); __rt_mutex_adjust_prio(owner); @@ -17219,7 +18378,7 @@ diff -Nur linux-4.1.26.orig/kernel/locking/rtmutex.c linux-4.1.26/kernel/locking chain_walk = 1; } else if (rt_mutex_cond_detect_deadlock(waiter, chwalk)) { chain_walk = 1; -@@ -957,8 +1357,9 @@ +@@ -957,8 +1357,9 @@ static int task_blocks_on_rt_mutex(struct rt_mutex *lock, /* * Wake up the next waiter on the lock. * @@ -17231,7 +18390,7 @@ diff -Nur linux-4.1.26.orig/kernel/locking/rtmutex.c linux-4.1.26/kernel/locking * * Called with lock->wait_lock held. */ -@@ -996,7 +1397,7 @@ +@@ -996,7 +1397,7 @@ static void wakeup_next_waiter(struct rt_mutex *lock) * long as we hold lock->wait_lock. The waiter task needs to * acquire it in order to dequeue the waiter. */ @@ -17240,7 +18399,7 @@ diff -Nur linux-4.1.26.orig/kernel/locking/rtmutex.c linux-4.1.26/kernel/locking } /* -@@ -1010,7 +1411,7 @@ +@@ -1010,7 +1411,7 @@ static void remove_waiter(struct rt_mutex *lock, { bool is_top_waiter = (waiter == rt_mutex_top_waiter(lock)); struct task_struct *owner = rt_mutex_owner(lock); @@ -17249,7 +18408,7 @@ diff -Nur linux-4.1.26.orig/kernel/locking/rtmutex.c linux-4.1.26/kernel/locking unsigned long flags; raw_spin_lock_irqsave(¤t->pi_lock, flags); -@@ -1035,7 +1436,8 @@ +@@ -1035,7 +1436,8 @@ static void remove_waiter(struct rt_mutex *lock, __rt_mutex_adjust_prio(owner); /* Store the lock on which owner is blocked or NULL */ @@ -17259,7 +18418,7 @@ diff -Nur linux-4.1.26.orig/kernel/locking/rtmutex.c linux-4.1.26/kernel/locking raw_spin_unlock_irqrestore(&owner->pi_lock, flags); -@@ -1071,17 +1473,17 @@ +@@ -1071,17 +1473,17 @@ void rt_mutex_adjust_pi(struct task_struct *task) raw_spin_lock_irqsave(&task->pi_lock, flags); waiter = task->pi_blocked_on; @@ -17279,7 +18438,7 @@ diff -Nur linux-4.1.26.orig/kernel/locking/rtmutex.c linux-4.1.26/kernel/locking rt_mutex_adjust_prio_chain(task, RT_MUTEX_MIN_CHAINWALK, NULL, next_lock, NULL, task); } -@@ -1099,7 +1501,8 @@ +@@ -1099,7 +1501,8 @@ void rt_mutex_adjust_pi(struct task_struct *task) static int __sched __rt_mutex_slowlock(struct rt_mutex *lock, int state, struct hrtimer_sleeper *timeout, @@ -17289,7 +18448,7 @@ diff -Nur linux-4.1.26.orig/kernel/locking/rtmutex.c linux-4.1.26/kernel/locking { int ret = 0; -@@ -1122,6 +1525,12 @@ +@@ -1122,6 +1525,12 @@ __rt_mutex_slowlock(struct rt_mutex *lock, int state, break; } @@ -17302,7 +18461,7 @@ diff -Nur linux-4.1.26.orig/kernel/locking/rtmutex.c linux-4.1.26/kernel/locking raw_spin_unlock(&lock->wait_lock); debug_rt_mutex_print_deadlock(waiter); -@@ -1156,25 +1565,102 @@ +@@ -1156,25 +1565,102 @@ static void rt_mutex_handle_deadlock(int res, int detect_deadlock, } } @@ -17409,7 +18568,7 @@ diff -Nur linux-4.1.26.orig/kernel/locking/rtmutex.c linux-4.1.26/kernel/locking raw_spin_unlock(&lock->wait_lock); return 0; } -@@ -1192,13 +1678,23 @@ +@@ -1192,13 +1678,23 @@ rt_mutex_slowlock(struct rt_mutex *lock, int state, if (likely(!ret)) /* sleep on the mutex */ @@ -17435,7 +18594,7 @@ diff -Nur linux-4.1.26.orig/kernel/locking/rtmutex.c linux-4.1.26/kernel/locking } /* -@@ -1255,7 +1751,7 @@ +@@ -1255,7 +1751,7 @@ static inline int rt_mutex_slowtrylock(struct rt_mutex *lock) /* * Slow path to release a rt-mutex: */ @@ -17444,7 +18603,7 @@ diff -Nur linux-4.1.26.orig/kernel/locking/rtmutex.c linux-4.1.26/kernel/locking rt_mutex_slowunlock(struct rt_mutex *lock) { raw_spin_lock(&lock->wait_lock); -@@ -1298,7 +1794,7 @@ +@@ -1298,7 +1794,7 @@ rt_mutex_slowunlock(struct rt_mutex *lock) while (!rt_mutex_has_waiters(lock)) { /* Drops lock->wait_lock ! */ if (unlock_rt_mutex_safe(lock) == true) @@ -17453,7 +18612,7 @@ diff -Nur linux-4.1.26.orig/kernel/locking/rtmutex.c linux-4.1.26/kernel/locking /* Relock the rtmutex and try again */ raw_spin_lock(&lock->wait_lock); } -@@ -1311,8 +1807,7 @@ +@@ -1311,8 +1807,7 @@ rt_mutex_slowunlock(struct rt_mutex *lock) raw_spin_unlock(&lock->wait_lock); @@ -17463,7 +18622,7 @@ diff -Nur linux-4.1.26.orig/kernel/locking/rtmutex.c linux-4.1.26/kernel/locking } /* -@@ -1323,31 +1818,36 @@ +@@ -1323,31 +1818,36 @@ rt_mutex_slowunlock(struct rt_mutex *lock) */ static inline int rt_mutex_fastlock(struct rt_mutex *lock, int state, @@ -17504,7 +18663,7 @@ diff -Nur linux-4.1.26.orig/kernel/locking/rtmutex.c linux-4.1.26/kernel/locking } static inline int -@@ -1363,12 +1863,14 @@ +@@ -1363,12 +1863,14 @@ rt_mutex_fasttrylock(struct rt_mutex *lock, static inline void rt_mutex_fastunlock(struct rt_mutex *lock, @@ -17523,7 +18682,7 @@ diff -Nur linux-4.1.26.orig/kernel/locking/rtmutex.c linux-4.1.26/kernel/locking } /** -@@ -1380,7 +1882,7 @@ +@@ -1380,7 +1882,7 @@ void __sched rt_mutex_lock(struct rt_mutex *lock) { might_sleep(); @@ -17532,7 +18691,7 @@ diff -Nur linux-4.1.26.orig/kernel/locking/rtmutex.c linux-4.1.26/kernel/locking } EXPORT_SYMBOL_GPL(rt_mutex_lock); -@@ -1397,7 +1899,7 @@ +@@ -1397,7 +1899,7 @@ int __sched rt_mutex_lock_interruptible(struct rt_mutex *lock) { might_sleep(); @@ -17541,7 +18700,7 @@ diff -Nur linux-4.1.26.orig/kernel/locking/rtmutex.c linux-4.1.26/kernel/locking } EXPORT_SYMBOL_GPL(rt_mutex_lock_interruptible); -@@ -1410,11 +1912,30 @@ +@@ -1410,11 +1912,30 @@ int rt_mutex_timed_futex_lock(struct rt_mutex *lock, might_sleep(); return rt_mutex_timed_fastlock(lock, TASK_INTERRUPTIBLE, timeout, @@ -17573,7 +18732,7 @@ diff -Nur linux-4.1.26.orig/kernel/locking/rtmutex.c linux-4.1.26/kernel/locking * rt_mutex_timed_lock - lock a rt_mutex interruptible * the timeout structure is provided * by the caller -@@ -1434,6 +1955,7 @@ +@@ -1434,6 +1955,7 @@ rt_mutex_timed_lock(struct rt_mutex *lock, struct hrtimer_sleeper *timeout) return rt_mutex_timed_fastlock(lock, TASK_INTERRUPTIBLE, timeout, RT_MUTEX_MIN_CHAINWALK, @@ -17581,7 +18740,7 @@ diff -Nur linux-4.1.26.orig/kernel/locking/rtmutex.c linux-4.1.26/kernel/locking rt_mutex_slowlock); } EXPORT_SYMBOL_GPL(rt_mutex_timed_lock); -@@ -1463,6 +1985,22 @@ +@@ -1463,6 +1985,22 @@ void __sched rt_mutex_unlock(struct rt_mutex *lock) EXPORT_SYMBOL_GPL(rt_mutex_unlock); /** @@ -17604,7 +18763,7 @@ diff -Nur linux-4.1.26.orig/kernel/locking/rtmutex.c linux-4.1.26/kernel/locking * rt_mutex_destroy - mark a mutex unusable * @lock: the mutex to be destroyed * -@@ -1492,13 +2030,12 @@ +@@ -1492,13 +2030,12 @@ EXPORT_SYMBOL_GPL(rt_mutex_destroy); void __rt_mutex_init(struct rt_mutex *lock, const char *name) { lock->owner = NULL; @@ -17619,7 +18778,7 @@ diff -Nur linux-4.1.26.orig/kernel/locking/rtmutex.c linux-4.1.26/kernel/locking /** * rt_mutex_init_proxy_locked - initialize and lock a rt_mutex on behalf of a -@@ -1513,7 +2050,7 @@ +@@ -1513,7 +2050,7 @@ EXPORT_SYMBOL_GPL(__rt_mutex_init); void rt_mutex_init_proxy_locked(struct rt_mutex *lock, struct task_struct *proxy_owner) { @@ -17628,7 +18787,7 @@ diff -Nur linux-4.1.26.orig/kernel/locking/rtmutex.c linux-4.1.26/kernel/locking debug_rt_mutex_proxy_lock(lock, proxy_owner); rt_mutex_set_owner(lock, proxy_owner); rt_mutex_deadlock_account_lock(lock, proxy_owner); -@@ -1561,6 +2098,35 @@ +@@ -1561,6 +2098,35 @@ int rt_mutex_start_proxy_lock(struct rt_mutex *lock, return 1; } @@ -17664,7 +18823,7 @@ diff -Nur linux-4.1.26.orig/kernel/locking/rtmutex.c linux-4.1.26/kernel/locking /* We enforce deadlock detection for futexes */ ret = task_blocks_on_rt_mutex(lock, waiter, task, RT_MUTEX_FULL_CHAINWALK); -@@ -1575,7 +2141,7 @@ +@@ -1575,7 +2141,7 @@ int rt_mutex_start_proxy_lock(struct rt_mutex *lock, ret = 0; } @@ -17673,7 +18832,7 @@ diff -Nur linux-4.1.26.orig/kernel/locking/rtmutex.c linux-4.1.26/kernel/locking remove_waiter(lock, waiter); raw_spin_unlock(&lock->wait_lock); -@@ -1631,7 +2197,7 @@ +@@ -1631,7 +2197,7 @@ int rt_mutex_finish_proxy_lock(struct rt_mutex *lock, set_current_state(TASK_INTERRUPTIBLE); /* sleep on the mutex */ @@ -17682,7 +18841,7 @@ diff -Nur linux-4.1.26.orig/kernel/locking/rtmutex.c linux-4.1.26/kernel/locking if (unlikely(ret)) remove_waiter(lock, waiter); -@@ -1646,3 +2212,89 @@ +@@ -1646,3 +2212,89 @@ int rt_mutex_finish_proxy_lock(struct rt_mutex *lock, return ret; } @@ -17772,10 +18931,11 @@ diff -Nur linux-4.1.26.orig/kernel/locking/rtmutex.c linux-4.1.26/kernel/locking +} +EXPORT_SYMBOL(ww_mutex_unlock); +#endif -diff -Nur linux-4.1.26.orig/kernel/locking/rtmutex_common.h linux-4.1.26/kernel/locking/rtmutex_common.h ---- linux-4.1.26.orig/kernel/locking/rtmutex_common.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/locking/rtmutex_common.h 2016-06-19 15:30:58.695297658 +0200 -@@ -49,6 +49,7 @@ +diff --git a/kernel/locking/rtmutex_common.h b/kernel/locking/rtmutex_common.h +index 855212501407..4d317e9a5d0f 100644 +--- a/kernel/locking/rtmutex_common.h ++++ b/kernel/locking/rtmutex_common.h +@@ -49,6 +49,7 @@ struct rt_mutex_waiter { struct rb_node pi_tree_entry; struct task_struct *task; struct rt_mutex *lock; @@ -17783,7 +18943,7 @@ diff -Nur linux-4.1.26.orig/kernel/locking/rtmutex_common.h linux-4.1.26/kernel/ #ifdef CONFIG_DEBUG_RT_MUTEXES unsigned long ip; struct pid *deadlock_task_pid; -@@ -119,6 +120,9 @@ +@@ -119,6 +120,9 @@ enum rtmutex_chainwalk { /* * PI-futex support (proxy locking functions, etc.): */ @@ -17793,7 +18953,7 @@ diff -Nur linux-4.1.26.orig/kernel/locking/rtmutex_common.h linux-4.1.26/kernel/ extern struct task_struct *rt_mutex_next_owner(struct rt_mutex *lock); extern void rt_mutex_init_proxy_locked(struct rt_mutex *lock, struct task_struct *proxy_owner); -@@ -132,10 +136,24 @@ +@@ -132,10 +136,24 @@ extern int rt_mutex_finish_proxy_lock(struct rt_mutex *lock, struct rt_mutex_waiter *waiter); extern int rt_mutex_timed_futex_lock(struct rt_mutex *l, struct hrtimer_sleeper *to); @@ -17818,10 +18978,11 @@ diff -Nur linux-4.1.26.orig/kernel/locking/rtmutex_common.h linux-4.1.26/kernel/ +} + #endif -diff -Nur linux-4.1.26.orig/kernel/locking/spinlock.c linux-4.1.26/kernel/locking/spinlock.c ---- linux-4.1.26.orig/kernel/locking/spinlock.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/locking/spinlock.c 2016-06-19 15:30:58.695297658 +0200 -@@ -124,8 +124,11 @@ +diff --git a/kernel/locking/spinlock.c b/kernel/locking/spinlock.c +index db3ccb1dd614..909779647bd1 100644 +--- a/kernel/locking/spinlock.c ++++ b/kernel/locking/spinlock.c +@@ -124,8 +124,11 @@ void __lockfunc __raw_##op##_lock_bh(locktype##_t *lock) \ * __[spin|read|write]_lock_bh() */ BUILD_LOCK_OPS(spin, raw_spinlock); @@ -17833,7 +18994,7 @@ diff -Nur linux-4.1.26.orig/kernel/locking/spinlock.c linux-4.1.26/kernel/lockin #endif -@@ -209,6 +212,8 @@ +@@ -209,6 +212,8 @@ void __lockfunc _raw_spin_unlock_bh(raw_spinlock_t *lock) EXPORT_SYMBOL(_raw_spin_unlock_bh); #endif @@ -17842,7 +19003,7 @@ diff -Nur linux-4.1.26.orig/kernel/locking/spinlock.c linux-4.1.26/kernel/lockin #ifndef CONFIG_INLINE_READ_TRYLOCK int __lockfunc _raw_read_trylock(rwlock_t *lock) { -@@ -353,6 +358,8 @@ +@@ -353,6 +358,8 @@ void __lockfunc _raw_write_unlock_bh(rwlock_t *lock) EXPORT_SYMBOL(_raw_write_unlock_bh); #endif @@ -17851,10 +19012,11 @@ diff -Nur linux-4.1.26.orig/kernel/locking/spinlock.c linux-4.1.26/kernel/lockin #ifdef CONFIG_DEBUG_LOCK_ALLOC void __lockfunc _raw_spin_lock_nested(raw_spinlock_t *lock, int subclass) -diff -Nur linux-4.1.26.orig/kernel/locking/spinlock_debug.c linux-4.1.26/kernel/locking/spinlock_debug.c ---- linux-4.1.26.orig/kernel/locking/spinlock_debug.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/locking/spinlock_debug.c 2016-06-19 15:30:58.695297658 +0200 -@@ -31,6 +31,7 @@ +diff --git a/kernel/locking/spinlock_debug.c b/kernel/locking/spinlock_debug.c +index 0374a596cffa..94970338d518 100644 +--- a/kernel/locking/spinlock_debug.c ++++ b/kernel/locking/spinlock_debug.c +@@ -31,6 +31,7 @@ void __raw_spin_lock_init(raw_spinlock_t *lock, const char *name, EXPORT_SYMBOL(__raw_spin_lock_init); @@ -17862,7 +19024,7 @@ diff -Nur linux-4.1.26.orig/kernel/locking/spinlock_debug.c linux-4.1.26/kernel/ void __rwlock_init(rwlock_t *lock, const char *name, struct lock_class_key *key) { -@@ -48,6 +49,7 @@ +@@ -48,6 +49,7 @@ void __rwlock_init(rwlock_t *lock, const char *name, } EXPORT_SYMBOL(__rwlock_init); @@ -17870,7 +19032,7 @@ diff -Nur linux-4.1.26.orig/kernel/locking/spinlock_debug.c linux-4.1.26/kernel/ static void spin_dump(raw_spinlock_t *lock, const char *msg) { -@@ -159,6 +161,7 @@ +@@ -159,6 +161,7 @@ void do_raw_spin_unlock(raw_spinlock_t *lock) arch_spin_unlock(&lock->raw_lock); } @@ -17878,16 +19040,17 @@ diff -Nur linux-4.1.26.orig/kernel/locking/spinlock_debug.c linux-4.1.26/kernel/ static void rwlock_bug(rwlock_t *lock, const char *msg) { if (!debug_locks_off()) -@@ -300,3 +303,5 @@ +@@ -300,3 +303,5 @@ void do_raw_write_unlock(rwlock_t *lock) debug_write_unlock(lock); arch_write_unlock(&lock->raw_lock); } + +#endif -diff -Nur linux-4.1.26.orig/kernel/panic.c linux-4.1.26/kernel/panic.c ---- linux-4.1.26.orig/kernel/panic.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/panic.c 2016-06-19 15:30:58.695297658 +0200 -@@ -399,9 +399,11 @@ +diff --git a/kernel/panic.c b/kernel/panic.c +index a4f7820f5930..cd91cec1f29a 100644 +--- a/kernel/panic.c ++++ b/kernel/panic.c +@@ -399,9 +399,11 @@ static u64 oops_id; static int init_oops_id(void) { @@ -17899,10 +19062,11 @@ diff -Nur linux-4.1.26.orig/kernel/panic.c linux-4.1.26/kernel/panic.c oops_id++; return 0; -diff -Nur linux-4.1.26.orig/kernel/power/hibernate.c linux-4.1.26/kernel/power/hibernate.c ---- linux-4.1.26.orig/kernel/power/hibernate.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/power/hibernate.c 2016-06-19 15:30:58.695297658 +0200 -@@ -285,6 +285,8 @@ +diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c +index 2329daae5255..b8f41a3635fd 100644 +--- a/kernel/power/hibernate.c ++++ b/kernel/power/hibernate.c +@@ -285,6 +285,8 @@ static int create_image(int platform_mode) local_irq_disable(); @@ -17911,7 +19075,7 @@ diff -Nur linux-4.1.26.orig/kernel/power/hibernate.c linux-4.1.26/kernel/power/h error = syscore_suspend(); if (error) { printk(KERN_ERR "PM: Some system devices failed to power down, " -@@ -314,6 +316,7 @@ +@@ -314,6 +316,7 @@ static int create_image(int platform_mode) syscore_resume(); Enable_irqs: @@ -17919,7 +19083,7 @@ diff -Nur linux-4.1.26.orig/kernel/power/hibernate.c linux-4.1.26/kernel/power/h local_irq_enable(); Enable_cpus: -@@ -437,6 +440,7 @@ +@@ -437,6 +440,7 @@ static int resume_target_kernel(bool platform_mode) goto Enable_cpus; local_irq_disable(); @@ -17927,7 +19091,7 @@ diff -Nur linux-4.1.26.orig/kernel/power/hibernate.c linux-4.1.26/kernel/power/h error = syscore_suspend(); if (error) -@@ -470,6 +474,7 @@ +@@ -470,6 +474,7 @@ static int resume_target_kernel(bool platform_mode) syscore_resume(); Enable_irqs: @@ -17935,7 +19099,7 @@ diff -Nur linux-4.1.26.orig/kernel/power/hibernate.c linux-4.1.26/kernel/power/h local_irq_enable(); Enable_cpus: -@@ -555,6 +560,7 @@ +@@ -555,6 +560,7 @@ int hibernation_platform_enter(void) goto Platform_finish; local_irq_disable(); @@ -17943,7 +19107,7 @@ diff -Nur linux-4.1.26.orig/kernel/power/hibernate.c linux-4.1.26/kernel/power/h syscore_suspend(); if (pm_wakeup_pending()) { error = -EAGAIN; -@@ -567,6 +573,7 @@ +@@ -567,6 +573,7 @@ int hibernation_platform_enter(void) Power_up: syscore_resume(); @@ -17951,10 +19115,11 @@ diff -Nur linux-4.1.26.orig/kernel/power/hibernate.c linux-4.1.26/kernel/power/h local_irq_enable(); enable_nonboot_cpus(); -diff -Nur linux-4.1.26.orig/kernel/power/suspend.c linux-4.1.26/kernel/power/suspend.c ---- linux-4.1.26.orig/kernel/power/suspend.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/power/suspend.c 2016-06-19 15:30:58.695297658 +0200 -@@ -356,6 +356,8 @@ +diff --git a/kernel/power/suspend.c b/kernel/power/suspend.c +index 8d7a1ef72758..db920b1704b1 100644 +--- a/kernel/power/suspend.c ++++ b/kernel/power/suspend.c +@@ -356,6 +356,8 @@ static int suspend_enter(suspend_state_t state, bool *wakeup) arch_suspend_disable_irqs(); BUG_ON(!irqs_disabled()); @@ -17963,7 +19128,7 @@ diff -Nur linux-4.1.26.orig/kernel/power/suspend.c linux-4.1.26/kernel/power/sus error = syscore_suspend(); if (!error) { *wakeup = pm_wakeup_pending(); -@@ -370,6 +372,8 @@ +@@ -370,6 +372,8 @@ static int suspend_enter(suspend_state_t state, bool *wakeup) syscore_resume(); } @@ -17972,10 +19137,11 @@ diff -Nur linux-4.1.26.orig/kernel/power/suspend.c linux-4.1.26/kernel/power/sus arch_suspend_enable_irqs(); BUG_ON(irqs_disabled()); -diff -Nur linux-4.1.26.orig/kernel/printk/printk.c linux-4.1.26/kernel/printk/printk.c ---- linux-4.1.26.orig/kernel/printk/printk.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/printk/printk.c 2016-06-19 15:30:58.695297658 +0200 -@@ -1163,6 +1163,7 @@ +diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c +index 3c1aca0c3543..398bf2bbd3bc 100644 +--- a/kernel/printk/printk.c ++++ b/kernel/printk/printk.c +@@ -1163,6 +1163,7 @@ static int syslog_print_all(char __user *buf, int size, bool clear) { char *text; int len = 0; @@ -17983,7 +19149,7 @@ diff -Nur linux-4.1.26.orig/kernel/printk/printk.c linux-4.1.26/kernel/printk/pr text = kmalloc(LOG_LINE_MAX + PREFIX_MAX, GFP_KERNEL); if (!text) -@@ -1174,7 +1175,14 @@ +@@ -1174,7 +1175,14 @@ static int syslog_print_all(char __user *buf, int size, bool clear) u64 seq; u32 idx; enum log_flags prev; @@ -17999,7 +19165,7 @@ diff -Nur linux-4.1.26.orig/kernel/printk/printk.c linux-4.1.26/kernel/printk/pr if (clear_seq < log_first_seq) { /* messages are gone, move to first available one */ clear_seq = log_first_seq; -@@ -1195,6 +1203,14 @@ +@@ -1195,6 +1203,14 @@ static int syslog_print_all(char __user *buf, int size, bool clear) prev = msg->flags; idx = log_next(idx); seq++; @@ -18014,7 +19180,7 @@ diff -Nur linux-4.1.26.orig/kernel/printk/printk.c linux-4.1.26/kernel/printk/pr } /* move first record forward until length fits into the buffer */ -@@ -1208,6 +1224,14 @@ +@@ -1208,6 +1224,14 @@ static int syslog_print_all(char __user *buf, int size, bool clear) prev = msg->flags; idx = log_next(idx); seq++; @@ -18029,7 +19195,7 @@ diff -Nur linux-4.1.26.orig/kernel/printk/printk.c linux-4.1.26/kernel/printk/pr } /* last message fitting into this dump */ -@@ -1248,6 +1272,7 @@ +@@ -1248,6 +1272,7 @@ static int syslog_print_all(char __user *buf, int size, bool clear) clear_seq = log_next_seq; clear_idx = log_next_idx; } @@ -18037,15 +19203,20 @@ diff -Nur linux-4.1.26.orig/kernel/printk/printk.c linux-4.1.26/kernel/printk/pr raw_spin_unlock_irq(&logbuf_lock); kfree(text); -@@ -1401,6 +1426,7 @@ +@@ -1401,6 +1426,12 @@ static void call_console_drivers(int level, const char *text, size_t len) if (!console_drivers) return; ++ if (IS_ENABLED(CONFIG_PREEMPT_RT_BASE)) { ++ if (in_irq() || in_nmi()) ++ return; ++ } ++ + migrate_disable(); for_each_console(con) { if (exclusive_console && con != exclusive_console) continue; -@@ -1413,6 +1439,7 @@ +@@ -1413,6 +1444,7 @@ static void call_console_drivers(int level, const char *text, size_t len) continue; con->write(con, text, len); } @@ -18053,7 +19224,7 @@ diff -Nur linux-4.1.26.orig/kernel/printk/printk.c linux-4.1.26/kernel/printk/pr } /* -@@ -1473,6 +1500,15 @@ +@@ -1473,6 +1505,15 @@ static inline int can_use_console(unsigned int cpu) static int console_trylock_for_printk(void) { unsigned int cpu = smp_processor_id(); @@ -18069,7 +19240,7 @@ diff -Nur linux-4.1.26.orig/kernel/printk/printk.c linux-4.1.26/kernel/printk/pr if (!console_trylock()) return 0; -@@ -1607,6 +1643,62 @@ +@@ -1607,6 +1648,62 @@ static size_t cont_print_text(char *text, size_t size) return textlen; } @@ -18132,7 +19303,7 @@ diff -Nur linux-4.1.26.orig/kernel/printk/printk.c linux-4.1.26/kernel/printk/pr asmlinkage int vprintk_emit(int facility, int level, const char *dict, size_t dictlen, const char *fmt, va_list args) -@@ -1623,6 +1715,13 @@ +@@ -1623,6 +1720,13 @@ asmlinkage int vprintk_emit(int facility, int level, /* cpu currently holding logbuf_lock in this function */ static unsigned int logbuf_cpu = UINT_MAX; @@ -18146,7 +19317,7 @@ diff -Nur linux-4.1.26.orig/kernel/printk/printk.c linux-4.1.26/kernel/printk/pr if (level == LOGLEVEL_SCHED) { level = LOGLEVEL_DEFAULT; in_sched = true; -@@ -1764,8 +1863,7 @@ +@@ -1764,8 +1868,7 @@ asmlinkage int vprintk_emit(int facility, int level, * console_sem which would prevent anyone from printing to * console */ @@ -18156,7 +19327,7 @@ diff -Nur linux-4.1.26.orig/kernel/printk/printk.c linux-4.1.26/kernel/printk/pr /* * Try to acquire and then immediately release the console * semaphore. The release will print out buffers and wake up -@@ -1773,7 +1871,7 @@ +@@ -1773,7 +1876,7 @@ asmlinkage int vprintk_emit(int facility, int level, */ if (console_trylock_for_printk()) console_unlock(); @@ -18165,7 +19336,7 @@ diff -Nur linux-4.1.26.orig/kernel/printk/printk.c linux-4.1.26/kernel/printk/pr lockdep_on(); } -@@ -1902,26 +2000,6 @@ +@@ -1902,26 +2005,6 @@ DEFINE_PER_CPU(printk_func_t, printk_func); #endif /* CONFIG_PRINTK */ @@ -18192,7 +19363,7 @@ diff -Nur linux-4.1.26.orig/kernel/printk/printk.c linux-4.1.26/kernel/printk/pr static int __add_preferred_console(char *name, int idx, char *options, char *brl_options) { -@@ -2143,11 +2221,16 @@ +@@ -2143,11 +2226,16 @@ static void console_cont_flush(char *text, size_t size) goto out; len = cont_print_text(text, size); @@ -18209,7 +19380,7 @@ diff -Nur linux-4.1.26.orig/kernel/printk/printk.c linux-4.1.26/kernel/printk/pr return; out: raw_spin_unlock_irqrestore(&logbuf_lock, flags); -@@ -2246,12 +2329,17 @@ +@@ -2246,12 +2334,17 @@ skip: console_idx = log_next(console_idx); console_seq++; console_prev = msg->flags; @@ -18227,10 +19398,23 @@ diff -Nur linux-4.1.26.orig/kernel/printk/printk.c linux-4.1.26/kernel/printk/pr if (do_cond_resched) cond_resched(); -diff -Nur linux-4.1.26.orig/kernel/ptrace.c linux-4.1.26/kernel/ptrace.c ---- linux-4.1.26.orig/kernel/ptrace.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/ptrace.c 2016-06-19 15:30:58.699297812 +0200 -@@ -129,7 +129,14 @@ +@@ -2304,6 +2397,11 @@ void console_unblank(void) + { + struct console *c; + ++ if (IS_ENABLED(CONFIG_PREEMPT_RT_BASE)) { ++ if (in_irq() || in_nmi()) ++ return; ++ } ++ + /* + * console_unblank can no longer be called in interrupt context unless + * oops_in_progress is set to 1.. +diff --git a/kernel/ptrace.c b/kernel/ptrace.c +index 261ee21e62db..e27549ebd299 100644 +--- a/kernel/ptrace.c ++++ b/kernel/ptrace.c +@@ -129,7 +129,14 @@ static bool ptrace_freeze_traced(struct task_struct *task) spin_lock_irq(&task->sighand->siglock); if (task_is_traced(task) && !__fatal_signal_pending(task)) { @@ -18246,10 +19430,11 @@ diff -Nur linux-4.1.26.orig/kernel/ptrace.c linux-4.1.26/kernel/ptrace.c ret = true; } spin_unlock_irq(&task->sighand->siglock); -diff -Nur linux-4.1.26.orig/kernel/rcu/rcutorture.c linux-4.1.26/kernel/rcu/rcutorture.c ---- linux-4.1.26.orig/kernel/rcu/rcutorture.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/rcu/rcutorture.c 2016-06-19 15:30:58.699297812 +0200 -@@ -389,6 +389,7 @@ +diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c +index 8dbe27611ec3..7b6170a46409 100644 +--- a/kernel/rcu/rcutorture.c ++++ b/kernel/rcu/rcutorture.c +@@ -389,6 +389,7 @@ static struct rcu_torture_ops rcu_ops = { .name = "rcu" }; @@ -18257,7 +19442,7 @@ diff -Nur linux-4.1.26.orig/kernel/rcu/rcutorture.c linux-4.1.26/kernel/rcu/rcut /* * Definitions for rcu_bh torture testing. */ -@@ -428,6 +429,12 @@ +@@ -428,6 +429,12 @@ static struct rcu_torture_ops rcu_bh_ops = { .name = "rcu_bh" }; @@ -18270,9 +19455,10 @@ diff -Nur linux-4.1.26.orig/kernel/rcu/rcutorture.c linux-4.1.26/kernel/rcu/rcut /* * Don't even think about trying any of these in real life!!! * The names includes "busted", and they really means it! -diff -Nur linux-4.1.26.orig/kernel/rcu/tree.c linux-4.1.26/kernel/rcu/tree.c ---- linux-4.1.26.orig/kernel/rcu/tree.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/rcu/tree.c 2016-06-19 15:30:58.699297812 +0200 +diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c +index 8cf7304b2867..965df22d96ad 100644 +--- a/kernel/rcu/tree.c ++++ b/kernel/rcu/tree.c @@ -56,6 +56,11 @@ #include <linux/random.h> #include <linux/ftrace_event.h> @@ -18285,7 +19471,7 @@ diff -Nur linux-4.1.26.orig/kernel/rcu/tree.c linux-4.1.26/kernel/rcu/tree.c #include "tree.h" #include "rcu.h" -@@ -220,6 +225,19 @@ +@@ -220,6 +225,19 @@ void rcu_sched_qs(void) } } @@ -18305,7 +19491,7 @@ diff -Nur linux-4.1.26.orig/kernel/rcu/tree.c linux-4.1.26/kernel/rcu/tree.c void rcu_bh_qs(void) { if (!__this_cpu_read(rcu_bh_data.passed_quiesce)) { -@@ -229,6 +247,7 @@ +@@ -229,6 +247,7 @@ void rcu_bh_qs(void) __this_cpu_write(rcu_bh_data.passed_quiesce, 1); } } @@ -18313,7 +19499,7 @@ diff -Nur linux-4.1.26.orig/kernel/rcu/tree.c linux-4.1.26/kernel/rcu/tree.c static DEFINE_PER_CPU(int, rcu_sched_qs_mask); -@@ -404,6 +423,7 @@ +@@ -404,6 +423,7 @@ unsigned long rcu_batches_completed_sched(void) } EXPORT_SYMBOL_GPL(rcu_batches_completed_sched); @@ -18321,7 +19507,7 @@ diff -Nur linux-4.1.26.orig/kernel/rcu/tree.c linux-4.1.26/kernel/rcu/tree.c /* * Return the number of RCU BH batches completed thus far for debug & stats. */ -@@ -431,6 +451,13 @@ +@@ -431,6 +451,13 @@ void rcu_bh_force_quiescent_state(void) } EXPORT_SYMBOL_GPL(rcu_bh_force_quiescent_state); @@ -18335,7 +19521,7 @@ diff -Nur linux-4.1.26.orig/kernel/rcu/tree.c linux-4.1.26/kernel/rcu/tree.c /* * Force a quiescent state for RCU-sched. */ -@@ -1545,7 +1572,7 @@ +@@ -1545,7 +1572,7 @@ static void rcu_gp_kthread_wake(struct rcu_state *rsp) !ACCESS_ONCE(rsp->gp_flags) || !rsp->gp_kthread) return; @@ -18344,7 +19530,7 @@ diff -Nur linux-4.1.26.orig/kernel/rcu/tree.c linux-4.1.26/kernel/rcu/tree.c } /* -@@ -1986,7 +2013,7 @@ +@@ -1986,7 +2013,7 @@ static int __noreturn rcu_gp_kthread(void *arg) ACCESS_ONCE(rsp->gpnum), TPS("reqwait")); rsp->gp_state = RCU_GP_WAIT_GPS; @@ -18353,7 +19539,7 @@ diff -Nur linux-4.1.26.orig/kernel/rcu/tree.c linux-4.1.26/kernel/rcu/tree.c ACCESS_ONCE(rsp->gp_flags) & RCU_GP_FLAG_INIT); /* Locking provides needed memory barrier. */ -@@ -2015,7 +2042,7 @@ +@@ -2015,7 +2042,7 @@ static int __noreturn rcu_gp_kthread(void *arg) ACCESS_ONCE(rsp->gpnum), TPS("fqswait")); rsp->gp_state = RCU_GP_WAIT_FQS; @@ -18362,7 +19548,7 @@ diff -Nur linux-4.1.26.orig/kernel/rcu/tree.c linux-4.1.26/kernel/rcu/tree.c ((gf = ACCESS_ONCE(rsp->gp_flags)) & RCU_GP_FLAG_FQS) || (!ACCESS_ONCE(rnp->qsmask) && -@@ -2860,18 +2887,17 @@ +@@ -2860,18 +2887,17 @@ __rcu_process_callbacks(struct rcu_state *rsp) /* * Do RCU core processing for the current CPU. */ @@ -18383,7 +19569,7 @@ diff -Nur linux-4.1.26.orig/kernel/rcu/tree.c linux-4.1.26/kernel/rcu/tree.c /* * Schedule RCU callback invocation. If the specified type of RCU * does not support RCU priority boosting, just do a direct call, -@@ -2883,18 +2909,105 @@ +@@ -2883,18 +2909,105 @@ static void invoke_rcu_callbacks(struct rcu_state *rsp, struct rcu_data *rdp) { if (unlikely(!ACCESS_ONCE(rcu_scheduler_fully_active))) return; @@ -18495,7 +19681,7 @@ diff -Nur linux-4.1.26.orig/kernel/rcu/tree.c linux-4.1.26/kernel/rcu/tree.c /* * Handle any core-RCU processing required by a call_rcu() invocation. -@@ -3040,6 +3153,7 @@ +@@ -3040,6 +3153,7 @@ void call_rcu_sched(struct rcu_head *head, void (*func)(struct rcu_head *rcu)) } EXPORT_SYMBOL_GPL(call_rcu_sched); @@ -18503,7 +19689,7 @@ diff -Nur linux-4.1.26.orig/kernel/rcu/tree.c linux-4.1.26/kernel/rcu/tree.c /* * Queue an RCU callback for invocation after a quicker grace period. */ -@@ -3048,6 +3162,7 @@ +@@ -3048,6 +3162,7 @@ void call_rcu_bh(struct rcu_head *head, void (*func)(struct rcu_head *rcu)) __call_rcu(head, func, &rcu_bh_state, -1, 0); } EXPORT_SYMBOL_GPL(call_rcu_bh); @@ -18511,7 +19697,7 @@ diff -Nur linux-4.1.26.orig/kernel/rcu/tree.c linux-4.1.26/kernel/rcu/tree.c /* * Queue an RCU callback for lazy invocation after a grace period. -@@ -3139,6 +3254,7 @@ +@@ -3139,6 +3254,7 @@ void synchronize_sched(void) } EXPORT_SYMBOL_GPL(synchronize_sched); @@ -18519,7 +19705,7 @@ diff -Nur linux-4.1.26.orig/kernel/rcu/tree.c linux-4.1.26/kernel/rcu/tree.c /** * synchronize_rcu_bh - wait until an rcu_bh grace period has elapsed. * -@@ -3165,6 +3281,7 @@ +@@ -3165,6 +3281,7 @@ void synchronize_rcu_bh(void) wait_rcu_gp(call_rcu_bh); } EXPORT_SYMBOL_GPL(synchronize_rcu_bh); @@ -18527,7 +19713,7 @@ diff -Nur linux-4.1.26.orig/kernel/rcu/tree.c linux-4.1.26/kernel/rcu/tree.c /** * get_state_synchronize_rcu - Snapshot current RCU state -@@ -3677,6 +3794,7 @@ +@@ -3677,6 +3794,7 @@ static void _rcu_barrier(struct rcu_state *rsp) mutex_unlock(&rsp->barrier_mutex); } @@ -18535,7 +19721,7 @@ diff -Nur linux-4.1.26.orig/kernel/rcu/tree.c linux-4.1.26/kernel/rcu/tree.c /** * rcu_barrier_bh - Wait until all in-flight call_rcu_bh() callbacks complete. */ -@@ -3685,6 +3803,7 @@ +@@ -3685,6 +3803,7 @@ void rcu_barrier_bh(void) _rcu_barrier(&rcu_bh_state); } EXPORT_SYMBOL_GPL(rcu_barrier_bh); @@ -18543,7 +19729,7 @@ diff -Nur linux-4.1.26.orig/kernel/rcu/tree.c linux-4.1.26/kernel/rcu/tree.c /** * rcu_barrier_sched - Wait for in-flight call_rcu_sched() callbacks. -@@ -4021,7 +4140,7 @@ +@@ -4021,7 +4140,7 @@ static void __init rcu_init_one(struct rcu_state *rsp, } } @@ -18552,7 +19738,7 @@ diff -Nur linux-4.1.26.orig/kernel/rcu/tree.c linux-4.1.26/kernel/rcu/tree.c rnp = rsp->level[rcu_num_lvls - 1]; for_each_possible_cpu(i) { while (i > rnp->grphi) -@@ -4120,7 +4239,6 @@ +@@ -4120,7 +4239,6 @@ void __init rcu_init(void) rcu_init_one(&rcu_bh_state, &rcu_bh_data); rcu_init_one(&rcu_sched_state, &rcu_sched_data); __rcu_init_preempt(); @@ -18560,9 +19746,10 @@ diff -Nur linux-4.1.26.orig/kernel/rcu/tree.c linux-4.1.26/kernel/rcu/tree.c /* * We don't need protection against CPU-hotplug here because -diff -Nur linux-4.1.26.orig/kernel/rcu/tree.h linux-4.1.26/kernel/rcu/tree.h ---- linux-4.1.26.orig/kernel/rcu/tree.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/rcu/tree.h 2016-06-19 15:30:58.699297812 +0200 +diff --git a/kernel/rcu/tree.h b/kernel/rcu/tree.h +index a69d3dab2ec4..8a9f0d3640de 100644 +--- a/kernel/rcu/tree.h ++++ b/kernel/rcu/tree.h @@ -27,6 +27,7 @@ #include <linux/threads.h> #include <linux/cpumask.h> @@ -18571,7 +19758,7 @@ diff -Nur linux-4.1.26.orig/kernel/rcu/tree.h linux-4.1.26/kernel/rcu/tree.h /* * Define shape of hierarchy based on NR_CPUS, CONFIG_RCU_FANOUT, and -@@ -210,7 +211,7 @@ +@@ -210,7 +211,7 @@ struct rcu_node { /* This can happen due to race conditions. */ #endif /* #ifdef CONFIG_RCU_BOOST */ #ifdef CONFIG_RCU_NOCB_CPU @@ -18580,7 +19767,7 @@ diff -Nur linux-4.1.26.orig/kernel/rcu/tree.h linux-4.1.26/kernel/rcu/tree.h /* Place for rcu_nocb_kthread() to wait GP. */ #endif /* #ifdef CONFIG_RCU_NOCB_CPU */ int need_future_gp[2]; -@@ -349,7 +350,7 @@ +@@ -349,7 +350,7 @@ struct rcu_data { atomic_long_t nocb_q_count_lazy; /* invocation (all stages). */ struct rcu_head *nocb_follower_head; /* CBs ready to invoke. */ struct rcu_head **nocb_follower_tail; @@ -18589,7 +19776,7 @@ diff -Nur linux-4.1.26.orig/kernel/rcu/tree.h linux-4.1.26/kernel/rcu/tree.h struct task_struct *nocb_kthread; int nocb_defer_wakeup; /* Defer wakeup of nocb_kthread. */ -@@ -438,7 +439,7 @@ +@@ -438,7 +439,7 @@ struct rcu_state { unsigned long gpnum; /* Current gp number. */ unsigned long completed; /* # of last completed gp. */ struct task_struct *gp_kthread; /* Task for grace periods. */ @@ -18598,7 +19785,7 @@ diff -Nur linux-4.1.26.orig/kernel/rcu/tree.h linux-4.1.26/kernel/rcu/tree.h short gp_flags; /* Commands for GP task. */ short gp_state; /* GP kthread sleep state. */ -@@ -529,12 +530,10 @@ +@@ -529,12 +530,10 @@ extern struct rcu_state rcu_preempt_state; DECLARE_PER_CPU(struct rcu_data, rcu_preempt_data); #endif /* #ifdef CONFIG_PREEMPT_RCU */ @@ -18611,7 +19798,7 @@ diff -Nur linux-4.1.26.orig/kernel/rcu/tree.h linux-4.1.26/kernel/rcu/tree.h #ifndef RCU_TREE_NONCORE -@@ -553,10 +552,9 @@ +@@ -553,10 +552,9 @@ void call_rcu(struct rcu_head *head, void (*func)(struct rcu_head *rcu)); static void __init __rcu_init_preempt(void); static void rcu_initiate_boost(struct rcu_node *rnp, unsigned long flags); static void rcu_preempt_boost_start_gp(struct rcu_node *rnp); @@ -18623,9 +19810,10 @@ diff -Nur linux-4.1.26.orig/kernel/rcu/tree.h linux-4.1.26/kernel/rcu/tree.h static int rcu_spawn_one_boost_kthread(struct rcu_state *rsp, struct rcu_node *rnp); #endif /* #ifdef CONFIG_RCU_BOOST */ -diff -Nur linux-4.1.26.orig/kernel/rcu/tree_plugin.h linux-4.1.26/kernel/rcu/tree_plugin.h ---- linux-4.1.26.orig/kernel/rcu/tree_plugin.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/rcu/tree_plugin.h 2016-06-19 15:30:58.699297812 +0200 +diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h +index 8c0ec0f5a027..54da8f44d586 100644 +--- a/kernel/rcu/tree_plugin.h ++++ b/kernel/rcu/tree_plugin.h @@ -24,27 +24,20 @@ * Paul E. McKenney <paulmck@linux.vnet.ibm.com> */ @@ -18656,7 +19844,7 @@ diff -Nur linux-4.1.26.orig/kernel/rcu/tree_plugin.h linux-4.1.26/kernel/rcu/tre #ifdef CONFIG_RCU_NOCB_CPU static cpumask_var_t rcu_nocb_mask; /* CPUs to have callbacks offloaded. */ static bool have_rcu_nocb_mask; /* Was rcu_nocb_mask allocated? */ -@@ -291,7 +284,7 @@ +@@ -291,7 +284,7 @@ void rcu_read_unlock_special(struct task_struct *t) } /* Hardware IRQ handlers cannot block, complain if they get here. */ @@ -18665,7 +19853,7 @@ diff -Nur linux-4.1.26.orig/kernel/rcu/tree_plugin.h linux-4.1.26/kernel/rcu/tre lockdep_rcu_suspicious(__FILE__, __LINE__, "rcu_read_unlock() from irq or softirq with blocking in critical section!!!\n"); pr_alert("->rcu_read_unlock_special: %#x (b: %d, nq: %d)\n", -@@ -496,15 +489,6 @@ +@@ -496,15 +489,6 @@ static void rcu_preempt_check_callbacks(void) t->rcu_read_unlock_special.b.need_qs = true; } @@ -18681,7 +19869,7 @@ diff -Nur linux-4.1.26.orig/kernel/rcu/tree_plugin.h linux-4.1.26/kernel/rcu/tre /* * Queue a preemptible-RCU callback for invocation after a grace period. */ -@@ -939,6 +923,19 @@ +@@ -939,6 +923,19 @@ void exit_rcu(void) #endif /* #else #ifdef CONFIG_PREEMPT_RCU */ @@ -18701,7 +19889,7 @@ diff -Nur linux-4.1.26.orig/kernel/rcu/tree_plugin.h linux-4.1.26/kernel/rcu/tre #ifdef CONFIG_RCU_BOOST #include "../locking/rtmutex_common.h" -@@ -970,16 +967,6 @@ +@@ -970,16 +967,6 @@ static void rcu_initiate_boost_trace(struct rcu_node *rnp) #endif /* #else #ifdef CONFIG_RCU_TRACE */ @@ -18718,7 +19906,7 @@ diff -Nur linux-4.1.26.orig/kernel/rcu/tree_plugin.h linux-4.1.26/kernel/rcu/tre /* * Carry out RCU priority boosting on the task indicated by ->exp_tasks * or ->boost_tasks, advancing the pointer to the next task in the -@@ -1125,23 +1112,6 @@ +@@ -1125,23 +1112,6 @@ static void rcu_initiate_boost(struct rcu_node *rnp, unsigned long flags) } /* @@ -18742,7 +19930,7 @@ diff -Nur linux-4.1.26.orig/kernel/rcu/tree_plugin.h linux-4.1.26/kernel/rcu/tre * Is the current CPU running the RCU-callbacks kthread? * Caller must have preemption disabled. */ -@@ -1196,67 +1166,6 @@ +@@ -1196,67 +1166,6 @@ static int rcu_spawn_one_boost_kthread(struct rcu_state *rsp, return 0; } @@ -18810,7 +19998,7 @@ diff -Nur linux-4.1.26.orig/kernel/rcu/tree_plugin.h linux-4.1.26/kernel/rcu/tre /* * Set the per-rcu_node kthread's affinity to cover all CPUs that are * served by the rcu_node in question. The CPU hotplug lock is still -@@ -1286,26 +1195,12 @@ +@@ -1286,26 +1195,12 @@ static void rcu_boost_kthread_setaffinity(struct rcu_node *rnp, int outgoingcpu) free_cpumask_var(cm); } @@ -18837,7 +20025,7 @@ diff -Nur linux-4.1.26.orig/kernel/rcu/tree_plugin.h linux-4.1.26/kernel/rcu/tre rcu_for_each_leaf_node(rcu_state_p, rnp) (void)rcu_spawn_one_boost_kthread(rcu_state_p, rnp); } -@@ -1328,11 +1223,6 @@ +@@ -1328,11 +1223,6 @@ static void rcu_initiate_boost(struct rcu_node *rnp, unsigned long flags) raw_spin_unlock_irqrestore(&rnp->lock, flags); } @@ -18849,7 +20037,7 @@ diff -Nur linux-4.1.26.orig/kernel/rcu/tree_plugin.h linux-4.1.26/kernel/rcu/tre static bool rcu_is_callbacks_kthread(void) { return false; -@@ -1356,7 +1246,7 @@ +@@ -1356,7 +1246,7 @@ static void rcu_prepare_kthreads(int cpu) #endif /* #else #ifdef CONFIG_RCU_BOOST */ @@ -18858,7 +20046,7 @@ diff -Nur linux-4.1.26.orig/kernel/rcu/tree_plugin.h linux-4.1.26/kernel/rcu/tre /* * Check to see if any future RCU-related work will need to be done -@@ -1374,7 +1264,9 @@ +@@ -1374,7 +1264,9 @@ int rcu_needs_cpu(unsigned long *delta_jiffies) return rcu_cpu_has_callbacks(NULL); } #endif /* #ifndef CONFIG_RCU_NOCB_CPU_ALL */ @@ -18868,7 +20056,7 @@ diff -Nur linux-4.1.26.orig/kernel/rcu/tree_plugin.h linux-4.1.26/kernel/rcu/tre /* * Because we do not have RCU_FAST_NO_HZ, don't bother cleaning up * after it. -@@ -1472,6 +1364,8 @@ +@@ -1472,6 +1364,8 @@ static bool __maybe_unused rcu_try_advance_all_cbs(void) return cbs_ready; } @@ -18877,7 +20065,7 @@ diff -Nur linux-4.1.26.orig/kernel/rcu/tree_plugin.h linux-4.1.26/kernel/rcu/tre /* * Allow the CPU to enter dyntick-idle mode unless it has callbacks ready * to invoke. If the CPU has callbacks, try to advance them. Tell the -@@ -1512,7 +1406,7 @@ +@@ -1512,7 +1406,7 @@ int rcu_needs_cpu(unsigned long *dj) return 0; } #endif /* #ifndef CONFIG_RCU_NOCB_CPU_ALL */ @@ -18886,7 +20074,7 @@ diff -Nur linux-4.1.26.orig/kernel/rcu/tree_plugin.h linux-4.1.26/kernel/rcu/tre /* * Prepare a CPU for idle from an RCU perspective. The first major task * is to sense whether nohz mode has been enabled or disabled via sysfs. -@@ -1859,7 +1753,7 @@ +@@ -1859,7 +1753,7 @@ early_param("rcu_nocb_poll", parse_rcu_nocb_poll); */ static void rcu_nocb_gp_cleanup(struct rcu_state *rsp, struct rcu_node *rnp) { @@ -18895,7 +20083,7 @@ diff -Nur linux-4.1.26.orig/kernel/rcu/tree_plugin.h linux-4.1.26/kernel/rcu/tre } /* -@@ -1877,8 +1771,8 @@ +@@ -1877,8 +1771,8 @@ static void rcu_nocb_gp_set(struct rcu_node *rnp, int nrq) static void rcu_init_one_nocb(struct rcu_node *rnp) { @@ -18906,7 +20094,7 @@ diff -Nur linux-4.1.26.orig/kernel/rcu/tree_plugin.h linux-4.1.26/kernel/rcu/tre } #ifndef CONFIG_RCU_NOCB_CPU_ALL -@@ -1903,7 +1797,7 @@ +@@ -1903,7 +1797,7 @@ static void wake_nocb_leader(struct rcu_data *rdp, bool force) if (ACCESS_ONCE(rdp_leader->nocb_leader_sleep) || force) { /* Prior smp_mb__after_atomic() orders against prior enqueue. */ ACCESS_ONCE(rdp_leader->nocb_leader_sleep) = false; @@ -18915,7 +20103,7 @@ diff -Nur linux-4.1.26.orig/kernel/rcu/tree_plugin.h linux-4.1.26/kernel/rcu/tre } } -@@ -2116,7 +2010,7 @@ +@@ -2116,7 +2010,7 @@ static void rcu_nocb_wait_gp(struct rcu_data *rdp) */ trace_rcu_future_gp(rnp, rdp, c, TPS("StartWait")); for (;;) { @@ -18924,7 +20112,7 @@ diff -Nur linux-4.1.26.orig/kernel/rcu/tree_plugin.h linux-4.1.26/kernel/rcu/tre rnp->nocb_gp_wq[c & 0x1], (d = ULONG_CMP_GE(ACCESS_ONCE(rnp->completed), c))); if (likely(d)) -@@ -2144,7 +2038,7 @@ +@@ -2144,7 +2038,7 @@ wait_again: /* Wait for callbacks to appear. */ if (!rcu_nocb_poll) { trace_rcu_nocb_wake(my_rdp->rsp->name, my_rdp->cpu, "Sleep"); @@ -18933,7 +20121,7 @@ diff -Nur linux-4.1.26.orig/kernel/rcu/tree_plugin.h linux-4.1.26/kernel/rcu/tre !ACCESS_ONCE(my_rdp->nocb_leader_sleep)); /* Memory barrier handled by smp_mb() calls below and repoll. */ } else if (firsttime) { -@@ -2219,7 +2113,7 @@ +@@ -2219,7 +2113,7 @@ wait_again: * List was empty, wake up the follower. * Memory barriers supplied by atomic_long_add(). */ @@ -18942,7 +20130,7 @@ diff -Nur linux-4.1.26.orig/kernel/rcu/tree_plugin.h linux-4.1.26/kernel/rcu/tre } } -@@ -2240,7 +2134,7 @@ +@@ -2240,7 +2134,7 @@ static void nocb_follower_wait(struct rcu_data *rdp) if (!rcu_nocb_poll) { trace_rcu_nocb_wake(rdp->rsp->name, rdp->cpu, "FollowerSleep"); @@ -18951,7 +20139,7 @@ diff -Nur linux-4.1.26.orig/kernel/rcu/tree_plugin.h linux-4.1.26/kernel/rcu/tre ACCESS_ONCE(rdp->nocb_follower_head)); } else if (firsttime) { /* Don't drown trace log with "Poll"! */ -@@ -2399,7 +2293,7 @@ +@@ -2399,7 +2293,7 @@ void __init rcu_init_nohz(void) static void __init rcu_boot_init_nocb_percpu_data(struct rcu_data *rdp) { rdp->nocb_tail = &rdp->nocb_head; @@ -18960,10 +20148,11 @@ diff -Nur linux-4.1.26.orig/kernel/rcu/tree_plugin.h linux-4.1.26/kernel/rcu/tre rdp->nocb_follower_tail = &rdp->nocb_follower_head; } -diff -Nur linux-4.1.26.orig/kernel/rcu/update.c linux-4.1.26/kernel/rcu/update.c ---- linux-4.1.26.orig/kernel/rcu/update.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/rcu/update.c 2016-06-19 15:30:58.699297812 +0200 -@@ -227,6 +227,7 @@ +diff --git a/kernel/rcu/update.c b/kernel/rcu/update.c +index 1f133350da01..1718c4fe9bce 100644 +--- a/kernel/rcu/update.c ++++ b/kernel/rcu/update.c +@@ -227,6 +227,7 @@ int rcu_read_lock_held(void) } EXPORT_SYMBOL_GPL(rcu_read_lock_held); @@ -18971,7 +20160,7 @@ diff -Nur linux-4.1.26.orig/kernel/rcu/update.c linux-4.1.26/kernel/rcu/update.c /** * rcu_read_lock_bh_held() - might we be in RCU-bh read-side critical section? * -@@ -253,6 +254,7 @@ +@@ -253,6 +254,7 @@ int rcu_read_lock_bh_held(void) return in_softirq() || irqs_disabled(); } EXPORT_SYMBOL_GPL(rcu_read_lock_bh_held); @@ -18979,10 +20168,11 @@ diff -Nur linux-4.1.26.orig/kernel/rcu/update.c linux-4.1.26/kernel/rcu/update.c #endif /* #ifdef CONFIG_DEBUG_LOCK_ALLOC */ -diff -Nur linux-4.1.26.orig/kernel/relay.c linux-4.1.26/kernel/relay.c ---- linux-4.1.26.orig/kernel/relay.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/relay.c 2016-06-19 15:30:58.699297812 +0200 -@@ -339,6 +339,10 @@ +diff --git a/kernel/relay.c b/kernel/relay.c +index e9dbaeb8fd65..509f68fb91e8 100644 +--- a/kernel/relay.c ++++ b/kernel/relay.c +@@ -339,6 +339,10 @@ static void wakeup_readers(unsigned long data) { struct rchan_buf *buf = (struct rchan_buf *)data; wake_up_interruptible(&buf->read_wait); @@ -18993,7 +20183,7 @@ diff -Nur linux-4.1.26.orig/kernel/relay.c linux-4.1.26/kernel/relay.c } /** -@@ -356,6 +360,7 @@ +@@ -356,6 +360,7 @@ static void __relay_reset(struct rchan_buf *buf, unsigned int init) init_waitqueue_head(&buf->read_wait); kref_init(&buf->kref); setup_timer(&buf->timer, wakeup_readers, (unsigned long)buf); @@ -19001,7 +20191,7 @@ diff -Nur linux-4.1.26.orig/kernel/relay.c linux-4.1.26/kernel/relay.c } else del_timer_sync(&buf->timer); -@@ -739,15 +744,6 @@ +@@ -739,15 +744,6 @@ size_t relay_switch_subbuf(struct rchan_buf *buf, size_t length) else buf->early_bytes += buf->chan->subbuf_size - buf->padding[old_subbuf]; @@ -19017,10 +20207,24 @@ diff -Nur linux-4.1.26.orig/kernel/relay.c linux-4.1.26/kernel/relay.c } old = buf->data; -diff -Nur linux-4.1.26.orig/kernel/sched/completion.c linux-4.1.26/kernel/sched/completion.c ---- linux-4.1.26.orig/kernel/sched/completion.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/sched/completion.c 2016-06-19 15:30:58.699297812 +0200 -@@ -30,10 +30,10 @@ +diff --git a/kernel/sched/Makefile b/kernel/sched/Makefile +index 46be87024875..3944d32a044d 100644 +--- a/kernel/sched/Makefile ++++ b/kernel/sched/Makefile +@@ -13,7 +13,7 @@ endif + + obj-y += core.o proc.o clock.o cputime.o + obj-y += idle_task.o fair.o rt.o deadline.o stop_task.o +-obj-y += wait.o completion.o idle.o ++obj-y += wait.o wait-simple.o work-simple.o completion.o idle.o + obj-$(CONFIG_SMP) += cpupri.o cpudeadline.o + obj-$(CONFIG_SCHED_AUTOGROUP) += auto_group.o + obj-$(CONFIG_SCHEDSTATS) += stats.o +diff --git a/kernel/sched/completion.c b/kernel/sched/completion.c +index 8d0f35debf35..45ebcffd9feb 100644 +--- a/kernel/sched/completion.c ++++ b/kernel/sched/completion.c +@@ -30,10 +30,10 @@ void complete(struct completion *x) { unsigned long flags; @@ -19034,7 +20238,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/completion.c linux-4.1.26/kernel/sched/ } EXPORT_SYMBOL(complete); -@@ -50,10 +50,10 @@ +@@ -50,10 +50,10 @@ void complete_all(struct completion *x) { unsigned long flags; @@ -19048,7 +20252,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/completion.c linux-4.1.26/kernel/sched/ } EXPORT_SYMBOL(complete_all); -@@ -62,20 +62,20 @@ +@@ -62,20 +62,20 @@ do_wait_for_common(struct completion *x, long (*action)(long), long timeout, int state) { if (!x->done) { @@ -19074,7 +20278,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/completion.c linux-4.1.26/kernel/sched/ if (!x->done) return timeout; } -@@ -89,9 +89,9 @@ +@@ -89,9 +89,9 @@ __wait_for_common(struct completion *x, { might_sleep(); @@ -19086,7 +20290,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/completion.c linux-4.1.26/kernel/sched/ return timeout; } -@@ -277,12 +277,12 @@ +@@ -277,12 +277,12 @@ bool try_wait_for_completion(struct completion *x) if (!READ_ONCE(x->done)) return 0; @@ -19101,7 +20305,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/completion.c linux-4.1.26/kernel/sched/ return ret; } EXPORT_SYMBOL(try_wait_for_completion); -@@ -311,7 +311,7 @@ +@@ -311,7 +311,7 @@ bool completion_done(struct completion *x) * after it's acquired the lock. */ smp_rmb(); @@ -19110,10 +20314,11 @@ diff -Nur linux-4.1.26.orig/kernel/sched/completion.c linux-4.1.26/kernel/sched/ return true; } EXPORT_SYMBOL(completion_done); -diff -Nur linux-4.1.26.orig/kernel/sched/core.c linux-4.1.26/kernel/sched/core.c ---- linux-4.1.26.orig/kernel/sched/core.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/sched/core.c 2016-06-19 15:30:58.703297966 +0200 -@@ -282,7 +282,11 @@ +diff --git a/kernel/sched/core.c b/kernel/sched/core.c +index 6cb5f00696f5..0d3a40b24304 100644 +--- a/kernel/sched/core.c ++++ b/kernel/sched/core.c +@@ -282,7 +282,11 @@ late_initcall(sched_init_debug); * Number of tasks to iterate in a single balance run. * Limited because this is done with IRQs disabled. */ @@ -19125,7 +20330,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/core.c linux-4.1.26/kernel/sched/core.c /* * period over which we average the RT time consumption, measured -@@ -461,6 +465,7 @@ +@@ -461,6 +465,7 @@ static void init_rq_hrtick(struct rq *rq) hrtimer_init(&rq->hrtick_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); rq->hrtick_timer.function = hrtick; @@ -19133,7 +20338,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/core.c linux-4.1.26/kernel/sched/core.c } #else /* CONFIG_SCHED_HRTICK */ static inline void hrtick_clear(struct rq *rq) -@@ -541,6 +546,52 @@ +@@ -541,6 +546,52 @@ static bool set_nr_if_polling(struct task_struct *p) #endif #endif @@ -19186,7 +20391,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/core.c linux-4.1.26/kernel/sched/core.c /* * resched_curr - mark rq's current task 'to be rescheduled now'. * -@@ -572,6 +623,38 @@ +@@ -572,6 +623,38 @@ void resched_curr(struct rq *rq) trace_sched_wake_idle_without_ipi(cpu); } @@ -19225,7 +20430,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/core.c linux-4.1.26/kernel/sched/core.c void resched_cpu(int cpu) { struct rq *rq = cpu_rq(cpu); -@@ -595,12 +678,14 @@ +@@ -595,12 +678,14 @@ void resched_cpu(int cpu) */ int get_nohz_timer_target(int pinned) { @@ -19242,7 +20447,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/core.c linux-4.1.26/kernel/sched/core.c rcu_read_lock(); for_each_domain(cpu, sd) { -@@ -613,6 +698,8 @@ +@@ -613,6 +698,8 @@ int get_nohz_timer_target(int pinned) } unlock: rcu_read_unlock(); @@ -19251,7 +20456,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/core.c linux-4.1.26/kernel/sched/core.c return cpu; } /* -@@ -1164,6 +1251,18 @@ +@@ -1164,6 +1251,18 @@ struct migration_arg { static int migration_cpu_stop(void *data); @@ -19270,7 +20475,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/core.c linux-4.1.26/kernel/sched/core.c /* * wait_task_inactive - wait for a thread to unschedule. * -@@ -1208,7 +1307,7 @@ +@@ -1208,7 +1307,7 @@ unsigned long wait_task_inactive(struct task_struct *p, long match_state) * is actually now running somewhere else! */ while (task_running(rq, p)) { @@ -19279,7 +20484,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/core.c linux-4.1.26/kernel/sched/core.c return 0; cpu_relax(); } -@@ -1223,7 +1322,8 @@ +@@ -1223,7 +1322,8 @@ unsigned long wait_task_inactive(struct task_struct *p, long match_state) running = task_running(rq, p); queued = task_on_rq_queued(p); ncsw = 0; @@ -19289,7 +20494,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/core.c linux-4.1.26/kernel/sched/core.c ncsw = p->nvcsw | LONG_MIN; /* sets MSB */ task_rq_unlock(rq, p, &flags); -@@ -1449,10 +1549,6 @@ +@@ -1449,10 +1549,6 @@ static void ttwu_activate(struct rq *rq, struct task_struct *p, int en_flags) { activate_task(rq, p, en_flags); p->on_rq = TASK_ON_RQ_QUEUED; @@ -19300,7 +20505,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/core.c linux-4.1.26/kernel/sched/core.c } /* -@@ -1462,9 +1558,9 @@ +@@ -1462,9 +1558,9 @@ static void ttwu_do_wakeup(struct rq *rq, struct task_struct *p, int wake_flags) { check_preempt_curr(rq, p, wake_flags); @@ -19312,7 +20517,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/core.c linux-4.1.26/kernel/sched/core.c #ifdef CONFIG_SMP if (p->sched_class->task_woken) p->sched_class->task_woken(rq, p); -@@ -1666,8 +1762,29 @@ +@@ -1666,8 +1762,29 @@ try_to_wake_up(struct task_struct *p, unsigned int state, int wake_flags) */ smp_mb__before_spinlock(); raw_spin_lock_irqsave(&p->pi_lock, flags); @@ -19343,7 +20548,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/core.c linux-4.1.26/kernel/sched/core.c success = 1; /* we're going to change ->state */ cpu = task_cpu(p); -@@ -1710,42 +1827,6 @@ +@@ -1732,42 +1849,6 @@ out: } /** @@ -19386,7 +20591,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/core.c linux-4.1.26/kernel/sched/core.c * wake_up_process - Wake up a specific process * @p: The process to be woken up. * -@@ -1759,11 +1840,23 @@ +@@ -1781,11 +1862,23 @@ out: */ int wake_up_process(struct task_struct *p) { @@ -19411,7 +20616,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/core.c linux-4.1.26/kernel/sched/core.c int wake_up_state(struct task_struct *p, unsigned int state) { return try_to_wake_up(p, state, 0); -@@ -1959,6 +2052,9 @@ +@@ -1981,6 +2074,9 @@ int sched_fork(unsigned long clone_flags, struct task_struct *p) p->on_cpu = 0; #endif init_task_preempt_count(p); @@ -19421,7 +20626,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/core.c linux-4.1.26/kernel/sched/core.c #ifdef CONFIG_SMP plist_node_init(&p->pushable_tasks, MAX_PRIO); RB_CLEAR_NODE(&p->pushable_dl_tasks); -@@ -2094,7 +2190,7 @@ +@@ -2116,7 +2212,7 @@ void wake_up_new_task(struct task_struct *p) rq = __task_rq_lock(p); activate_task(rq, p, 0); p->on_rq = TASK_ON_RQ_QUEUED; @@ -19430,7 +20635,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/core.c linux-4.1.26/kernel/sched/core.c check_preempt_curr(rq, p, WF_FORK); #ifdef CONFIG_SMP if (p->sched_class->task_woken) -@@ -2231,8 +2327,12 @@ +@@ -2253,8 +2349,12 @@ static struct rq *finish_task_switch(struct task_struct *prev) finish_arch_post_lock_switch(); fire_sched_in_preempt_notifiers(current); @@ -19444,7 +20649,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/core.c linux-4.1.26/kernel/sched/core.c if (unlikely(prev_state == TASK_DEAD)) { if (prev->sched_class->task_dead) prev->sched_class->task_dead(prev); -@@ -2543,16 +2643,6 @@ +@@ -2565,16 +2665,6 @@ u64 scheduler_tick_max_deferment(void) } #endif @@ -19461,7 +20666,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/core.c linux-4.1.26/kernel/sched/core.c #if defined(CONFIG_PREEMPT) && (defined(CONFIG_DEBUG_PREEMPT) || \ defined(CONFIG_PREEMPT_TRACER)) -@@ -2574,7 +2664,7 @@ +@@ -2596,7 +2686,7 @@ void preempt_count_add(int val) PREEMPT_MASK - 10); #endif if (preempt_count() == val) { @@ -19470,7 +20675,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/core.c linux-4.1.26/kernel/sched/core.c #ifdef CONFIG_DEBUG_PREEMPT current->preempt_disable_ip = ip; #endif -@@ -2601,7 +2691,7 @@ +@@ -2623,7 +2713,7 @@ void preempt_count_sub(int val) #endif if (preempt_count() == val) @@ -19479,7 +20684,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/core.c linux-4.1.26/kernel/sched/core.c __preempt_count_sub(val); } EXPORT_SYMBOL(preempt_count_sub); -@@ -2657,6 +2747,133 @@ +@@ -2679,6 +2769,133 @@ static inline void schedule_debug(struct task_struct *prev) schedstat_inc(this_rq(), sched_count); } @@ -19613,7 +20818,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/core.c linux-4.1.26/kernel/sched/core.c /* * Pick up the highest-prio task: */ -@@ -2763,6 +2980,8 @@ +@@ -2785,6 +3002,8 @@ static void __sched __schedule(void) smp_mb__before_spinlock(); raw_spin_lock_irq(&rq->lock); @@ -19622,7 +20827,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/core.c linux-4.1.26/kernel/sched/core.c rq->clock_skip_update <<= 1; /* promote REQ to ACT */ switch_count = &prev->nivcsw; -@@ -2772,19 +2991,6 @@ +@@ -2794,19 +3013,6 @@ static void __sched __schedule(void) } else { deactivate_task(rq, prev, DEQUEUE_SLEEP); prev->on_rq = 0; @@ -19642,7 +20847,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/core.c linux-4.1.26/kernel/sched/core.c } switch_count = &prev->nvcsw; } -@@ -2794,6 +3000,7 @@ +@@ -2816,6 +3022,7 @@ static void __sched __schedule(void) next = pick_next_task(rq, prev); clear_tsk_need_resched(prev); @@ -19650,7 +20855,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/core.c linux-4.1.26/kernel/sched/core.c clear_preempt_need_resched(); rq->clock_skip_update = 0; -@@ -2814,8 +3021,19 @@ +@@ -2836,8 +3043,19 @@ static void __sched __schedule(void) static inline void sched_submit_work(struct task_struct *tsk) { @@ -19671,7 +20876,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/core.c linux-4.1.26/kernel/sched/core.c /* * If we are going to sleep and we have plugged IO queued, * make sure to submit it to avoid deadlocks. -@@ -2824,6 +3042,12 @@ +@@ -2846,6 +3064,12 @@ static inline void sched_submit_work(struct task_struct *tsk) blk_schedule_flush_plug(tsk); } @@ -19684,7 +20889,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/core.c linux-4.1.26/kernel/sched/core.c asmlinkage __visible void __sched schedule(void) { struct task_struct *tsk = current; -@@ -2832,6 +3056,7 @@ +@@ -2854,6 +3078,7 @@ asmlinkage __visible void __sched schedule(void) do { __schedule(); } while (need_resched()); @@ -19692,7 +20897,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/core.c linux-4.1.26/kernel/sched/core.c } EXPORT_SYMBOL(schedule); -@@ -2881,6 +3106,30 @@ +@@ -2903,6 +3128,30 @@ static void __sched notrace preempt_schedule_common(void) } while (need_resched()); } @@ -19713,7 +20918,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/core.c linux-4.1.26/kernel/sched/core.c + +#else + -+static int preemptible_lazy(void) ++static inline int preemptible_lazy(void) +{ + return 1; +} @@ -19723,7 +20928,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/core.c linux-4.1.26/kernel/sched/core.c #ifdef CONFIG_PREEMPT /* * this is the entry point to schedule() from in-kernel preemption -@@ -2895,6 +3144,8 @@ +@@ -2917,6 +3166,8 @@ asmlinkage __visible void __sched notrace preempt_schedule(void) */ if (likely(!preemptible())) return; @@ -19732,7 +20937,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/core.c linux-4.1.26/kernel/sched/core.c preempt_schedule_common(); } -@@ -2922,6 +3173,8 @@ +@@ -2944,6 +3195,8 @@ asmlinkage __visible void __sched notrace preempt_schedule_context(void) if (likely(!preemptible())) return; @@ -19741,7 +20946,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/core.c linux-4.1.26/kernel/sched/core.c do { __preempt_count_add(PREEMPT_ACTIVE); -@@ -2931,7 +3184,16 @@ +@@ -2953,7 +3206,16 @@ asmlinkage __visible void __sched notrace preempt_schedule_context(void) * an infinite recursion. */ prev_ctx = exception_enter(); @@ -19758,7 +20963,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/core.c linux-4.1.26/kernel/sched/core.c exception_exit(prev_ctx); __preempt_count_sub(PREEMPT_ACTIVE); -@@ -4268,6 +4530,7 @@ +@@ -4290,6 +4552,7 @@ int __cond_resched_lock(spinlock_t *lock) } EXPORT_SYMBOL(__cond_resched_lock); @@ -19766,7 +20971,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/core.c linux-4.1.26/kernel/sched/core.c int __sched __cond_resched_softirq(void) { BUG_ON(!in_softirq()); -@@ -4281,6 +4544,7 @@ +@@ -4303,6 +4566,7 @@ int __sched __cond_resched_softirq(void) return 0; } EXPORT_SYMBOL(__cond_resched_softirq); @@ -19774,7 +20979,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/core.c linux-4.1.26/kernel/sched/core.c /** * yield - yield the current processor to other threads. -@@ -4635,7 +4899,9 @@ +@@ -4659,7 +4923,9 @@ void init_idle(struct task_struct *idle, int cpu) /* Set the preempt count _outside_ the spinlocks! */ init_idle_preempt_count(idle, cpu); @@ -19785,7 +20990,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/core.c linux-4.1.26/kernel/sched/core.c /* * The idle tasks have their own, simple scheduling class: */ -@@ -4755,11 +5021,91 @@ +@@ -4779,11 +5045,91 @@ static struct rq *move_queued_task(struct task_struct *p, int new_cpu) void do_set_cpus_allowed(struct task_struct *p, const struct cpumask *new_mask) { @@ -19880,7 +21085,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/core.c linux-4.1.26/kernel/sched/core.c } /* -@@ -4805,7 +5151,7 @@ +@@ -4829,7 +5175,7 @@ int set_cpus_allowed_ptr(struct task_struct *p, const struct cpumask *new_mask) do_set_cpus_allowed(p, new_mask); /* Can the task run on the task's current CPU? If so, we're done */ @@ -19889,7 +21094,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/core.c linux-4.1.26/kernel/sched/core.c goto out; dest_cpu = cpumask_any_and(cpu_active_mask, new_mask); -@@ -4945,6 +5291,8 @@ +@@ -4969,6 +5315,8 @@ static int migration_cpu_stop(void *data) #ifdef CONFIG_HOTPLUG_CPU @@ -19898,7 +21103,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/core.c linux-4.1.26/kernel/sched/core.c /* * Ensures that the idle task is using init_mm right before its cpu goes * offline. -@@ -4959,7 +5307,11 @@ +@@ -4983,7 +5331,11 @@ void idle_task_exit(void) switch_mm(mm, &init_mm, current); finish_arch_post_lock_switch(); } @@ -19911,7 +21116,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/core.c linux-4.1.26/kernel/sched/core.c } /* -@@ -5302,6 +5654,10 @@ +@@ -5326,6 +5678,10 @@ migration_call(struct notifier_block *nfb, unsigned long action, void *hcpu) case CPU_DEAD: calc_load_migrate(rq); @@ -19922,7 +21127,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/core.c linux-4.1.26/kernel/sched/core.c break; #endif } -@@ -7281,7 +7637,8 @@ +@@ -7305,7 +7661,8 @@ void __init sched_init(void) #ifdef CONFIG_DEBUG_ATOMIC_SLEEP static inline int preempt_count_equals(int preempt_offset) { @@ -19932,10 +21137,11 @@ diff -Nur linux-4.1.26.orig/kernel/sched/core.c linux-4.1.26/kernel/sched/core.c return (nested == preempt_offset); } -diff -Nur linux-4.1.26.orig/kernel/sched/cputime.c linux-4.1.26/kernel/sched/cputime.c ---- linux-4.1.26.orig/kernel/sched/cputime.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/sched/cputime.c 2016-06-19 15:30:58.703297966 +0200 -@@ -675,37 +675,45 @@ +diff --git a/kernel/sched/cputime.c b/kernel/sched/cputime.c +index 87b8576cbd50..2ee44eb30f2b 100644 +--- a/kernel/sched/cputime.c ++++ b/kernel/sched/cputime.c +@@ -675,37 +675,45 @@ static void __vtime_account_system(struct task_struct *tsk) void vtime_account_system(struct task_struct *tsk) { @@ -19989,7 +21195,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/cputime.c linux-4.1.26/kernel/sched/cpu } void vtime_guest_enter(struct task_struct *tsk) -@@ -717,19 +725,23 @@ +@@ -717,19 +725,23 @@ void vtime_guest_enter(struct task_struct *tsk) * synchronization against the reader (task_gtime()) * that can thus safely catch up with a tickless delta. */ @@ -20017,7 +21223,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/cputime.c linux-4.1.26/kernel/sched/cpu } EXPORT_SYMBOL_GPL(vtime_guest_exit); -@@ -742,24 +754,30 @@ +@@ -742,24 +754,30 @@ void vtime_account_idle(struct task_struct *tsk) void arch_vtime_task_switch(struct task_struct *prev) { @@ -20054,7 +21260,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/cputime.c linux-4.1.26/kernel/sched/cpu } cputime_t task_gtime(struct task_struct *t) -@@ -768,13 +786,13 @@ +@@ -768,13 +786,13 @@ cputime_t task_gtime(struct task_struct *t) cputime_t gtime; do { @@ -20070,7 +21276,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/cputime.c linux-4.1.26/kernel/sched/cpu return gtime; } -@@ -797,7 +815,7 @@ +@@ -797,7 +815,7 @@ fetch_task_cputime(struct task_struct *t, *udelta = 0; *sdelta = 0; @@ -20079,7 +21285,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/cputime.c linux-4.1.26/kernel/sched/cpu if (u_dst) *u_dst = *u_src; -@@ -821,7 +839,7 @@ +@@ -821,7 +839,7 @@ fetch_task_cputime(struct task_struct *t, if (t->vtime_snap_whence == VTIME_SYS) *sdelta = delta; } @@ -20088,10 +21294,11 @@ diff -Nur linux-4.1.26.orig/kernel/sched/cputime.c linux-4.1.26/kernel/sched/cpu } -diff -Nur linux-4.1.26.orig/kernel/sched/deadline.c linux-4.1.26/kernel/sched/deadline.c ---- linux-4.1.26.orig/kernel/sched/deadline.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/sched/deadline.c 2016-06-19 15:30:58.703297966 +0200 -@@ -637,6 +637,7 @@ +diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c +index 5e95145088fd..0c261c5114e0 100644 +--- a/kernel/sched/deadline.c ++++ b/kernel/sched/deadline.c +@@ -637,6 +637,7 @@ void init_dl_task_timer(struct sched_dl_entity *dl_se) hrtimer_init(timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); timer->function = dl_task_timer; @@ -20099,10 +21306,11 @@ diff -Nur linux-4.1.26.orig/kernel/sched/deadline.c linux-4.1.26/kernel/sched/de } static -diff -Nur linux-4.1.26.orig/kernel/sched/debug.c linux-4.1.26/kernel/sched/debug.c ---- linux-4.1.26.orig/kernel/sched/debug.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/sched/debug.c 2016-06-19 15:30:58.703297966 +0200 -@@ -260,6 +260,9 @@ +diff --git a/kernel/sched/debug.c b/kernel/sched/debug.c +index a245c1fc6f0a..34b00001b00a 100644 +--- a/kernel/sched/debug.c ++++ b/kernel/sched/debug.c +@@ -260,6 +260,9 @@ void print_rt_rq(struct seq_file *m, int cpu, struct rt_rq *rt_rq) P(rt_throttled); PN(rt_time); PN(rt_runtime); @@ -20112,7 +21320,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/debug.c linux-4.1.26/kernel/sched/debug #undef PN #undef P -@@ -648,6 +651,10 @@ +@@ -648,6 +651,10 @@ void proc_sched_show_task(struct task_struct *p, struct seq_file *m) #endif P(policy); P(prio); @@ -20123,10 +21331,11 @@ diff -Nur linux-4.1.26.orig/kernel/sched/debug.c linux-4.1.26/kernel/sched/debug #undef PN #undef __PN #undef P -diff -Nur linux-4.1.26.orig/kernel/sched/fair.c linux-4.1.26/kernel/sched/fair.c ---- linux-4.1.26.orig/kernel/sched/fair.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/sched/fair.c 2016-06-19 15:30:58.703297966 +0200 -@@ -3201,7 +3201,7 @@ +diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c +index 77690b653ca9..7aae8d27611e 100644 +--- a/kernel/sched/fair.c ++++ b/kernel/sched/fair.c +@@ -3201,7 +3201,7 @@ check_preempt_tick(struct cfs_rq *cfs_rq, struct sched_entity *curr) ideal_runtime = sched_slice(cfs_rq, curr); delta_exec = curr->sum_exec_runtime - curr->prev_sum_exec_runtime; if (delta_exec > ideal_runtime) { @@ -20135,7 +21344,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/fair.c linux-4.1.26/kernel/sched/fair.c /* * The current task ran long enough, ensure it doesn't get * re-elected due to buddy favours. -@@ -3225,7 +3225,7 @@ +@@ -3225,7 +3225,7 @@ check_preempt_tick(struct cfs_rq *cfs_rq, struct sched_entity *curr) return; if (delta > ideal_runtime) @@ -20144,7 +21353,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/fair.c linux-4.1.26/kernel/sched/fair.c } static void -@@ -3366,7 +3366,7 @@ +@@ -3366,7 +3366,7 @@ entity_tick(struct cfs_rq *cfs_rq, struct sched_entity *curr, int queued) * validating it and just reschedule. */ if (queued) { @@ -20153,7 +21362,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/fair.c linux-4.1.26/kernel/sched/fair.c return; } /* -@@ -3557,7 +3557,7 @@ +@@ -3557,7 +3557,7 @@ static void __account_cfs_rq_runtime(struct cfs_rq *cfs_rq, u64 delta_exec) * hierarchy can be throttled */ if (!assign_cfs_rq_runtime(cfs_rq) && likely(cfs_rq->curr)) @@ -20162,7 +21371,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/fair.c linux-4.1.26/kernel/sched/fair.c } static __always_inline -@@ -4180,7 +4180,7 @@ +@@ -4180,7 +4180,7 @@ static void hrtick_start_fair(struct rq *rq, struct task_struct *p) if (delta < 0) { if (rq->curr == p) @@ -20171,7 +21380,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/fair.c linux-4.1.26/kernel/sched/fair.c return; } hrtick_start(rq, delta); -@@ -5076,7 +5076,7 @@ +@@ -5076,7 +5076,7 @@ static void check_preempt_wakeup(struct rq *rq, struct task_struct *p, int wake_ return; preempt: @@ -20180,7 +21389,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/fair.c linux-4.1.26/kernel/sched/fair.c /* * Only set the backward buddy when the current task is still * on the rq. This can happen when a wakeup gets interleaved -@@ -7869,7 +7869,7 @@ +@@ -7869,7 +7869,7 @@ static void task_fork_fair(struct task_struct *p) * 'current' within the tree based on its new key value. */ swap(curr->vruntime, se->vruntime); @@ -20189,7 +21398,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/fair.c linux-4.1.26/kernel/sched/fair.c } se->vruntime -= cfs_rq->min_vruntime; -@@ -7894,7 +7894,7 @@ +@@ -7894,7 +7894,7 @@ prio_changed_fair(struct rq *rq, struct task_struct *p, int oldprio) */ if (rq->curr == p) { if (p->prio > oldprio) @@ -20198,10 +21407,11 @@ diff -Nur linux-4.1.26.orig/kernel/sched/fair.c linux-4.1.26/kernel/sched/fair.c } else check_preempt_curr(rq, p, 0); } -diff -Nur linux-4.1.26.orig/kernel/sched/features.h linux-4.1.26/kernel/sched/features.h ---- linux-4.1.26.orig/kernel/sched/features.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/sched/features.h 2016-06-19 15:30:58.707298121 +0200 -@@ -50,11 +50,19 @@ +diff --git a/kernel/sched/features.h b/kernel/sched/features.h +index 91e33cd485f6..0ea4e37751d7 100644 +--- a/kernel/sched/features.h ++++ b/kernel/sched/features.h +@@ -50,11 +50,19 @@ SCHED_FEAT(LB_BIAS, true) */ SCHED_FEAT(NONTASK_CAPACITY, true) @@ -20221,22 +21431,11 @@ diff -Nur linux-4.1.26.orig/kernel/sched/features.h linux-4.1.26/kernel/sched/fe #ifdef HAVE_RT_PUSH_IPI /* -diff -Nur linux-4.1.26.orig/kernel/sched/Makefile linux-4.1.26/kernel/sched/Makefile ---- linux-4.1.26.orig/kernel/sched/Makefile 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/sched/Makefile 2016-06-19 15:30:58.699297812 +0200 -@@ -13,7 +13,7 @@ - - obj-y += core.o proc.o clock.o cputime.o - obj-y += idle_task.o fair.o rt.o deadline.o stop_task.o --obj-y += wait.o completion.o idle.o -+obj-y += wait.o wait-simple.o work-simple.o completion.o idle.o - obj-$(CONFIG_SMP) += cpupri.o cpudeadline.o - obj-$(CONFIG_SCHED_AUTOGROUP) += auto_group.o - obj-$(CONFIG_SCHEDSTATS) += stats.o -diff -Nur linux-4.1.26.orig/kernel/sched/rt.c linux-4.1.26/kernel/sched/rt.c ---- linux-4.1.26.orig/kernel/sched/rt.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/sched/rt.c 2016-06-19 15:30:58.707298121 +0200 -@@ -44,6 +44,7 @@ +diff --git a/kernel/sched/rt.c b/kernel/sched/rt.c +index 575da76a3874..637aa208a58d 100644 +--- a/kernel/sched/rt.c ++++ b/kernel/sched/rt.c +@@ -44,6 +44,7 @@ void init_rt_bandwidth(struct rt_bandwidth *rt_b, u64 period, u64 runtime) hrtimer_init(&rt_b->rt_period_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); @@ -20244,7 +21443,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/rt.c linux-4.1.26/kernel/sched/rt.c rt_b->rt_period_timer.function = sched_rt_period_timer; } -@@ -89,6 +90,7 @@ +@@ -89,6 +90,7 @@ void init_rt_rq(struct rt_rq *rt_rq) rt_rq->push_cpu = nr_cpu_ids; raw_spin_lock_init(&rt_rq->push_lock); init_irq_work(&rt_rq->push_work, push_irq_work_func); @@ -20252,10 +21451,11 @@ diff -Nur linux-4.1.26.orig/kernel/sched/rt.c linux-4.1.26/kernel/sched/rt.c #endif #endif /* CONFIG_SMP */ /* We start is dequeued state, because no RT tasks are queued */ -diff -Nur linux-4.1.26.orig/kernel/sched/sched.h linux-4.1.26/kernel/sched/sched.h ---- linux-4.1.26.orig/kernel/sched/sched.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/sched/sched.h 2016-06-19 15:30:58.707298121 +0200 -@@ -1093,6 +1093,7 @@ +diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h +index aa1f059de4f7..1bdd1e5f056d 100644 +--- a/kernel/sched/sched.h ++++ b/kernel/sched/sched.h +@@ -1093,6 +1093,7 @@ static inline void finish_lock_switch(struct rq *rq, struct task_struct *prev) #define WF_SYNC 0x01 /* waker goes to sleep after wakeup */ #define WF_FORK 0x02 /* child wakeup after fork */ #define WF_MIGRATED 0x4 /* internal use, task got migrated */ @@ -20263,7 +21463,7 @@ diff -Nur linux-4.1.26.orig/kernel/sched/sched.h linux-4.1.26/kernel/sched/sched /* * To aid in avoiding the subversion of "niceness" due to uneven distribution -@@ -1290,6 +1291,15 @@ +@@ -1290,6 +1291,15 @@ extern void init_sched_dl_class(void); extern void resched_curr(struct rq *rq); extern void resched_cpu(int cpu); @@ -20279,9 +21479,11 @@ diff -Nur linux-4.1.26.orig/kernel/sched/sched.h linux-4.1.26/kernel/sched/sched extern struct rt_bandwidth def_rt_bandwidth; extern void init_rt_bandwidth(struct rt_bandwidth *rt_b, u64 period, u64 runtime); -diff -Nur linux-4.1.26.orig/kernel/sched/wait-simple.c linux-4.1.26/kernel/sched/wait-simple.c ---- linux-4.1.26.orig/kernel/sched/wait-simple.c 1970-01-01 01:00:00.000000000 +0100 -+++ linux-4.1.26/kernel/sched/wait-simple.c 2016-06-19 15:30:58.707298121 +0200 +diff --git a/kernel/sched/wait-simple.c b/kernel/sched/wait-simple.c +new file mode 100644 +index 000000000000..7dfa86d1f654 +--- /dev/null ++++ b/kernel/sched/wait-simple.c @@ -0,0 +1,115 @@ +/* + * Simple waitqueues without fancy flags and callbacks @@ -20398,9 +21600,11 @@ diff -Nur linux-4.1.26.orig/kernel/sched/wait-simple.c linux-4.1.26/kernel/sched + return woken; +} +EXPORT_SYMBOL(__swait_wake); -diff -Nur linux-4.1.26.orig/kernel/sched/work-simple.c linux-4.1.26/kernel/sched/work-simple.c ---- linux-4.1.26.orig/kernel/sched/work-simple.c 1970-01-01 01:00:00.000000000 +0100 -+++ linux-4.1.26/kernel/sched/work-simple.c 2016-06-19 15:30:58.707298121 +0200 +diff --git a/kernel/sched/work-simple.c b/kernel/sched/work-simple.c +new file mode 100644 +index 000000000000..e57a0522573f +--- /dev/null ++++ b/kernel/sched/work-simple.c @@ -0,0 +1,173 @@ +/* + * Copyright (C) 2014 BMW Car IT GmbH, Daniel Wagner daniel.wagner@bmw-carit.de @@ -20575,9 +21779,10 @@ diff -Nur linux-4.1.26.orig/kernel/sched/work-simple.c linux-4.1.26/kernel/sched + mutex_unlock(&worker_mutex); +} +EXPORT_SYMBOL_GPL(swork_put); -diff -Nur linux-4.1.26.orig/kernel/signal.c linux-4.1.26/kernel/signal.c ---- linux-4.1.26.orig/kernel/signal.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/signal.c 2016-06-19 15:30:58.707298121 +0200 +diff --git a/kernel/signal.c b/kernel/signal.c +index 0206be728dac..1336e4c016ba 100644 +--- a/kernel/signal.c ++++ b/kernel/signal.c @@ -14,6 +14,7 @@ #include <linux/export.h> #include <linux/init.h> @@ -20586,7 +21791,7 @@ diff -Nur linux-4.1.26.orig/kernel/signal.c linux-4.1.26/kernel/signal.c #include <linux/fs.h> #include <linux/tty.h> #include <linux/binfmts.h> -@@ -352,13 +353,45 @@ +@@ -352,13 +353,45 @@ static bool task_participate_group_stop(struct task_struct *task) return false; } @@ -20633,7 +21838,7 @@ diff -Nur linux-4.1.26.orig/kernel/signal.c linux-4.1.26/kernel/signal.c { struct sigqueue *q = NULL; struct user_struct *user; -@@ -375,7 +408,10 @@ +@@ -375,7 +408,10 @@ __sigqueue_alloc(int sig, struct task_struct *t, gfp_t flags, int override_rlimi if (override_rlimit || atomic_read(&user->sigpending) <= task_rlimit(t, RLIMIT_SIGPENDING)) { @@ -20645,7 +21850,7 @@ diff -Nur linux-4.1.26.orig/kernel/signal.c linux-4.1.26/kernel/signal.c } else { print_dropped_signal(sig); } -@@ -392,6 +428,13 @@ +@@ -392,6 +428,13 @@ __sigqueue_alloc(int sig, struct task_struct *t, gfp_t flags, int override_rlimi return q; } @@ -20659,7 +21864,7 @@ diff -Nur linux-4.1.26.orig/kernel/signal.c linux-4.1.26/kernel/signal.c static void __sigqueue_free(struct sigqueue *q) { if (q->flags & SIGQUEUE_PREALLOC) -@@ -401,6 +444,21 @@ +@@ -401,6 +444,21 @@ static void __sigqueue_free(struct sigqueue *q) kmem_cache_free(sigqueue_cachep, q); } @@ -20681,7 +21886,7 @@ diff -Nur linux-4.1.26.orig/kernel/signal.c linux-4.1.26/kernel/signal.c void flush_sigqueue(struct sigpending *queue) { struct sigqueue *q; -@@ -414,6 +472,21 @@ +@@ -414,6 +472,21 @@ void flush_sigqueue(struct sigpending *queue) } /* @@ -20703,7 +21908,7 @@ diff -Nur linux-4.1.26.orig/kernel/signal.c linux-4.1.26/kernel/signal.c * Flush all pending signals for a task. */ void __flush_signals(struct task_struct *t) -@@ -565,7 +638,7 @@ +@@ -565,7 +638,7 @@ static void collect_signal(int sig, struct sigpending *list, siginfo_t *info) still_pending: list_del_init(&first->list); copy_siginfo(info, &first->info); @@ -20712,7 +21917,7 @@ diff -Nur linux-4.1.26.orig/kernel/signal.c linux-4.1.26/kernel/signal.c } else { /* * Ok, it wasn't in the queue. This must be -@@ -611,6 +684,8 @@ +@@ -611,6 +684,8 @@ int dequeue_signal(struct task_struct *tsk, sigset_t *mask, siginfo_t *info) { int signr; @@ -20721,7 +21926,7 @@ diff -Nur linux-4.1.26.orig/kernel/signal.c linux-4.1.26/kernel/signal.c /* We only dequeue private signals from ourselves, we don't let * signalfd steal them */ -@@ -1207,8 +1282,8 @@ +@@ -1207,8 +1282,8 @@ int do_send_sig_info(int sig, struct siginfo *info, struct task_struct *p, * We don't want to have recursive SIGSEGV's etc, for example, * that is why we also clear SIGNAL_UNKILLABLE. */ @@ -20732,7 +21937,7 @@ diff -Nur linux-4.1.26.orig/kernel/signal.c linux-4.1.26/kernel/signal.c { unsigned long int flags; int ret, blocked, ignored; -@@ -1233,6 +1308,39 @@ +@@ -1233,6 +1308,39 @@ force_sig_info(int sig, struct siginfo *info, struct task_struct *t) return ret; } @@ -20772,7 +21977,7 @@ diff -Nur linux-4.1.26.orig/kernel/signal.c linux-4.1.26/kernel/signal.c /* * Nuke all other threads in the group. */ -@@ -1267,12 +1375,12 @@ +@@ -1267,12 +1375,12 @@ struct sighand_struct *__lock_task_sighand(struct task_struct *tsk, * Disable interrupts early to avoid deadlocks. * See rcu_read_unlock() comment header for details. */ @@ -20787,7 +21992,7 @@ diff -Nur linux-4.1.26.orig/kernel/signal.c linux-4.1.26/kernel/signal.c break; } /* -@@ -1293,7 +1401,7 @@ +@@ -1293,7 +1401,7 @@ struct sighand_struct *__lock_task_sighand(struct task_struct *tsk, } spin_unlock(&sighand->siglock); rcu_read_unlock(); @@ -20796,7 +22001,7 @@ diff -Nur linux-4.1.26.orig/kernel/signal.c linux-4.1.26/kernel/signal.c } return sighand; -@@ -1536,7 +1644,8 @@ +@@ -1536,7 +1644,8 @@ EXPORT_SYMBOL(kill_pid); */ struct sigqueue *sigqueue_alloc(void) { @@ -20806,7 +22011,7 @@ diff -Nur linux-4.1.26.orig/kernel/signal.c linux-4.1.26/kernel/signal.c if (q) q->flags |= SIGQUEUE_PREALLOC; -@@ -1897,15 +2006,7 @@ +@@ -1897,15 +2006,7 @@ static void ptrace_stop(int exit_code, int why, int clear_code, siginfo_t *info) if (gstop_done && ptrace_reparented(current)) do_notify_parent_cldstop(current, false, why); @@ -20822,9 +22027,10 @@ diff -Nur linux-4.1.26.orig/kernel/signal.c linux-4.1.26/kernel/signal.c freezable_schedule(); } else { /* -diff -Nur linux-4.1.26.orig/kernel/softirq.c linux-4.1.26/kernel/softirq.c ---- linux-4.1.26.orig/kernel/softirq.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/softirq.c 2016-06-19 15:30:58.707298121 +0200 +diff --git a/kernel/softirq.c b/kernel/softirq.c +index 479e4436f787..cb9c1d5dee10 100644 +--- a/kernel/softirq.c ++++ b/kernel/softirq.c @@ -21,10 +21,12 @@ #include <linux/freezer.h> #include <linux/kthread.h> @@ -20838,7 +22044,7 @@ diff -Nur linux-4.1.26.orig/kernel/softirq.c linux-4.1.26/kernel/softirq.c #include <linux/irq.h> #define CREATE_TRACE_POINTS -@@ -56,12 +58,108 @@ +@@ -56,12 +58,108 @@ EXPORT_SYMBOL(irq_stat); static struct softirq_action softirq_vec[NR_SOFTIRQS] __cacheline_aligned_in_smp; DEFINE_PER_CPU(struct task_struct *, ksoftirqd); @@ -20947,7 +22153,7 @@ diff -Nur linux-4.1.26.orig/kernel/softirq.c linux-4.1.26/kernel/softirq.c /* * we cannot loop indefinitely here to avoid userspace starvation, * but we also don't want to introduce a worst case 1/HZ latency -@@ -77,6 +175,79 @@ +@@ -77,6 +175,79 @@ static void wakeup_softirqd(void) wake_up_process(tsk); } @@ -21027,7 +22233,7 @@ diff -Nur linux-4.1.26.orig/kernel/softirq.c linux-4.1.26/kernel/softirq.c /* * preempt_count and SOFTIRQ_OFFSET usage: * - preempt_count is changed by SOFTIRQ_OFFSET on entering or leaving -@@ -116,9 +287,9 @@ +@@ -116,9 +287,9 @@ void __local_bh_disable_ip(unsigned long ip, unsigned int cnt) if (preempt_count() == cnt) { #ifdef CONFIG_DEBUG_PREEMPT @@ -21039,7 +22245,7 @@ diff -Nur linux-4.1.26.orig/kernel/softirq.c linux-4.1.26/kernel/softirq.c } } EXPORT_SYMBOL(__local_bh_disable_ip); -@@ -232,10 +403,8 @@ +@@ -232,10 +403,8 @@ asmlinkage __visible void __do_softirq(void) unsigned long end = jiffies + MAX_SOFTIRQ_TIME; unsigned long old_flags = current->flags; int max_restart = MAX_SOFTIRQ_RESTART; @@ -21050,7 +22256,7 @@ diff -Nur linux-4.1.26.orig/kernel/softirq.c linux-4.1.26/kernel/softirq.c /* * Mask out PF_MEMALLOC s current task context is borrowed for the -@@ -254,36 +423,7 @@ +@@ -254,36 +423,7 @@ restart: /* Reset the pending bitmask before enabling irqs */ set_softirq_pending(0); @@ -21088,7 +22294,7 @@ diff -Nur linux-4.1.26.orig/kernel/softirq.c linux-4.1.26/kernel/softirq.c pending = local_softirq_pending(); if (pending) { -@@ -320,6 +460,310 @@ +@@ -320,6 +460,310 @@ asmlinkage __visible void do_softirq(void) } /* @@ -21399,7 +22605,7 @@ diff -Nur linux-4.1.26.orig/kernel/softirq.c linux-4.1.26/kernel/softirq.c * Enter an interrupt context. */ void irq_enter(void) -@@ -330,9 +774,9 @@ +@@ -330,9 +774,9 @@ void irq_enter(void) * Prevent raise_softirq from needlessly waking up ksoftirqd * here, as softirq will be serviced on return from interrupt. */ @@ -21411,7 +22617,7 @@ diff -Nur linux-4.1.26.orig/kernel/softirq.c linux-4.1.26/kernel/softirq.c } __irq_enter(); -@@ -340,6 +784,7 @@ +@@ -340,6 +784,7 @@ void irq_enter(void) static inline void invoke_softirq(void) { @@ -21419,7 +22625,7 @@ diff -Nur linux-4.1.26.orig/kernel/softirq.c linux-4.1.26/kernel/softirq.c if (!force_irqthreads) { #ifdef CONFIG_HAVE_IRQ_EXIT_ON_IRQ_STACK /* -@@ -359,6 +804,18 @@ +@@ -359,6 +804,18 @@ static inline void invoke_softirq(void) } else { wakeup_softirqd(); } @@ -21438,7 +22644,7 @@ diff -Nur linux-4.1.26.orig/kernel/softirq.c linux-4.1.26/kernel/softirq.c } static inline void tick_irq_exit(void) -@@ -395,26 +852,6 @@ +@@ -395,26 +852,6 @@ void irq_exit(void) trace_hardirq_exit(); /* must be last! */ } @@ -21465,7 +22671,7 @@ diff -Nur linux-4.1.26.orig/kernel/softirq.c linux-4.1.26/kernel/softirq.c void raise_softirq(unsigned int nr) { unsigned long flags; -@@ -424,12 +861,6 @@ +@@ -424,12 +861,6 @@ void raise_softirq(unsigned int nr) local_irq_restore(flags); } @@ -21478,7 +22684,7 @@ diff -Nur linux-4.1.26.orig/kernel/softirq.c linux-4.1.26/kernel/softirq.c void open_softirq(int nr, void (*action)(struct softirq_action *)) { softirq_vec[nr].action = action; -@@ -446,15 +877,45 @@ +@@ -446,15 +877,45 @@ struct tasklet_head { static DEFINE_PER_CPU(struct tasklet_head, tasklet_vec); static DEFINE_PER_CPU(struct tasklet_head, tasklet_hi_vec); @@ -21528,7 +22734,7 @@ diff -Nur linux-4.1.26.orig/kernel/softirq.c linux-4.1.26/kernel/softirq.c local_irq_restore(flags); } EXPORT_SYMBOL(__tasklet_schedule); -@@ -464,10 +925,7 @@ +@@ -464,10 +925,7 @@ void __tasklet_hi_schedule(struct tasklet_struct *t) unsigned long flags; local_irq_save(flags); @@ -21540,7 +22746,7 @@ diff -Nur linux-4.1.26.orig/kernel/softirq.c linux-4.1.26/kernel/softirq.c local_irq_restore(flags); } EXPORT_SYMBOL(__tasklet_hi_schedule); -@@ -476,82 +934,122 @@ +@@ -476,82 +934,122 @@ void __tasklet_hi_schedule_first(struct tasklet_struct *t) { BUG_ON(!irqs_disabled()); @@ -21712,7 +22918,7 @@ diff -Nur linux-4.1.26.orig/kernel/softirq.c linux-4.1.26/kernel/softirq.c } void tasklet_init(struct tasklet_struct *t, -@@ -572,7 +1070,7 @@ +@@ -572,7 +1070,7 @@ void tasklet_kill(struct tasklet_struct *t) while (test_and_set_bit(TASKLET_STATE_SCHED, &t->state)) { do { @@ -21721,7 +22927,7 @@ diff -Nur linux-4.1.26.orig/kernel/softirq.c linux-4.1.26/kernel/softirq.c } while (test_bit(TASKLET_STATE_SCHED, &t->state)); } tasklet_unlock_wait(t); -@@ -646,25 +1144,26 @@ +@@ -646,25 +1144,26 @@ void __init softirq_init(void) open_softirq(HI_SOFTIRQ, tasklet_hi_action); } @@ -21763,7 +22969,7 @@ diff -Nur linux-4.1.26.orig/kernel/softirq.c linux-4.1.26/kernel/softirq.c } #ifdef CONFIG_HOTPLUG_CPU -@@ -746,16 +1245,31 @@ +@@ -746,16 +1245,31 @@ static struct notifier_block cpu_nfb = { static struct smp_hotplug_thread softirq_threads = { .store = &ksoftirqd, @@ -21795,10 +23001,11 @@ diff -Nur linux-4.1.26.orig/kernel/softirq.c linux-4.1.26/kernel/softirq.c return 0; } -diff -Nur linux-4.1.26.orig/kernel/stop_machine.c linux-4.1.26/kernel/stop_machine.c ---- linux-4.1.26.orig/kernel/stop_machine.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/stop_machine.c 2016-06-19 15:30:58.707298121 +0200 -@@ -35,7 +35,7 @@ +diff --git a/kernel/stop_machine.c b/kernel/stop_machine.c +index 695f0c6cd169..d3ea2452e291 100644 +--- a/kernel/stop_machine.c ++++ b/kernel/stop_machine.c +@@ -35,7 +35,7 @@ struct cpu_stop_done { /* the actual stopper, one per every possible cpu, enabled on online cpus */ struct cpu_stopper { @@ -21807,7 +23014,7 @@ diff -Nur linux-4.1.26.orig/kernel/stop_machine.c linux-4.1.26/kernel/stop_machi bool enabled; /* is this stopper enabled? */ struct list_head works; /* list of pending works */ }; -@@ -78,7 +78,7 @@ +@@ -78,7 +78,7 @@ static void cpu_stop_queue_work(unsigned int cpu, struct cpu_stop_work *work) unsigned long flags; @@ -21816,7 +23023,7 @@ diff -Nur linux-4.1.26.orig/kernel/stop_machine.c linux-4.1.26/kernel/stop_machi if (stopper->enabled) { list_add_tail(&work->list, &stopper->works); -@@ -86,7 +86,7 @@ +@@ -86,7 +86,7 @@ static void cpu_stop_queue_work(unsigned int cpu, struct cpu_stop_work *work) } else cpu_stop_signal_done(work->done, false); @@ -21825,7 +23032,7 @@ diff -Nur linux-4.1.26.orig/kernel/stop_machine.c linux-4.1.26/kernel/stop_machi } /** -@@ -248,7 +248,7 @@ +@@ -248,7 +248,7 @@ int stop_two_cpus(unsigned int cpu1, unsigned int cpu2, cpu_stop_fn_t fn, void * struct irq_cpu_stop_queue_work_info call_args; struct multi_stop_data msdata; @@ -21834,7 +23041,7 @@ diff -Nur linux-4.1.26.orig/kernel/stop_machine.c linux-4.1.26/kernel/stop_machi msdata = (struct multi_stop_data){ .fn = fn, .data = arg, -@@ -281,7 +281,7 @@ +@@ -281,7 +281,7 @@ int stop_two_cpus(unsigned int cpu1, unsigned int cpu2, cpu_stop_fn_t fn, void * * This relies on the stopper workqueues to be FIFO. */ if (!cpu_active(cpu1) || !cpu_active(cpu2)) { @@ -21843,7 +23050,7 @@ diff -Nur linux-4.1.26.orig/kernel/stop_machine.c linux-4.1.26/kernel/stop_machi return -ENOENT; } -@@ -295,7 +295,7 @@ +@@ -295,7 +295,7 @@ int stop_two_cpus(unsigned int cpu1, unsigned int cpu2, cpu_stop_fn_t fn, void * &irq_cpu_stop_queue_work, &call_args, 1); lg_local_unlock(&stop_cpus_lock); @@ -21852,7 +23059,7 @@ diff -Nur linux-4.1.26.orig/kernel/stop_machine.c linux-4.1.26/kernel/stop_machi wait_for_completion(&done.completion); -@@ -329,7 +329,7 @@ +@@ -329,7 +329,7 @@ static DEFINE_PER_CPU(struct cpu_stop_work, stop_cpus_work); static void queue_stop_cpus_work(const struct cpumask *cpumask, cpu_stop_fn_t fn, void *arg, @@ -21861,7 +23068,7 @@ diff -Nur linux-4.1.26.orig/kernel/stop_machine.c linux-4.1.26/kernel/stop_machi { struct cpu_stop_work *work; unsigned int cpu; -@@ -343,11 +343,13 @@ +@@ -343,11 +343,13 @@ static void queue_stop_cpus_work(const struct cpumask *cpumask, } /* @@ -21879,7 +23086,7 @@ diff -Nur linux-4.1.26.orig/kernel/stop_machine.c linux-4.1.26/kernel/stop_machi for_each_cpu(cpu, cpumask) cpu_stop_queue_work(cpu, &per_cpu(stop_cpus_work, cpu)); lg_global_unlock(&stop_cpus_lock); -@@ -359,7 +361,7 @@ +@@ -359,7 +361,7 @@ static int __stop_cpus(const struct cpumask *cpumask, struct cpu_stop_done done; cpu_stop_init_done(&done, cpumask_weight(cpumask)); @@ -21888,7 +23095,7 @@ diff -Nur linux-4.1.26.orig/kernel/stop_machine.c linux-4.1.26/kernel/stop_machi wait_for_completion(&done.completion); return done.executed ? done.ret : -ENOENT; } -@@ -439,9 +441,9 @@ +@@ -439,9 +441,9 @@ static int cpu_stop_should_run(unsigned int cpu) unsigned long flags; int run; @@ -21900,7 +23107,7 @@ diff -Nur linux-4.1.26.orig/kernel/stop_machine.c linux-4.1.26/kernel/stop_machi return run; } -@@ -453,13 +455,13 @@ +@@ -453,13 +455,13 @@ static void cpu_stopper_thread(unsigned int cpu) repeat: work = NULL; @@ -21916,7 +23123,7 @@ diff -Nur linux-4.1.26.orig/kernel/stop_machine.c linux-4.1.26/kernel/stop_machi if (work) { cpu_stop_fn_t fn = work->fn; -@@ -467,6 +469,16 @@ +@@ -467,6 +469,16 @@ repeat: struct cpu_stop_done *done = work->done; char ksym_buf[KSYM_NAME_LEN] __maybe_unused; @@ -21933,7 +23140,7 @@ diff -Nur linux-4.1.26.orig/kernel/stop_machine.c linux-4.1.26/kernel/stop_machi /* cpu stop callbacks are not allowed to sleep */ preempt_disable(); -@@ -500,20 +512,20 @@ +@@ -500,20 +512,20 @@ static void cpu_stop_park(unsigned int cpu) unsigned long flags; /* drain remaining works */ @@ -21958,7 +23165,7 @@ diff -Nur linux-4.1.26.orig/kernel/stop_machine.c linux-4.1.26/kernel/stop_machi } static struct smp_hotplug_thread cpu_stop_threads = { -@@ -535,10 +547,12 @@ +@@ -535,10 +547,12 @@ static int __init cpu_stop_init(void) for_each_possible_cpu(cpu) { struct cpu_stopper *stopper = &per_cpu(cpu_stopper, cpu); @@ -21972,7 +23179,7 @@ diff -Nur linux-4.1.26.orig/kernel/stop_machine.c linux-4.1.26/kernel/stop_machi BUG_ON(smpboot_register_percpu_thread(&cpu_stop_threads)); stop_machine_initialized = true; return 0; -@@ -634,7 +648,7 @@ +@@ -634,7 +648,7 @@ int stop_machine_from_inactive_cpu(int (*fn)(void *), void *data, set_state(&msdata, MULTI_STOP_PREPARE); cpu_stop_init_done(&done, num_active_cpus()); queue_stop_cpus_work(cpu_active_mask, multi_cpu_stop, &msdata, @@ -21981,9 +23188,10 @@ diff -Nur linux-4.1.26.orig/kernel/stop_machine.c linux-4.1.26/kernel/stop_machi ret = multi_cpu_stop(&msdata); /* Busy wait for completion. */ -diff -Nur linux-4.1.26.orig/kernel/time/hrtimer.c linux-4.1.26/kernel/time/hrtimer.c ---- linux-4.1.26.orig/kernel/time/hrtimer.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/time/hrtimer.c 2016-06-19 15:30:58.707298121 +0200 +diff --git a/kernel/time/hrtimer.c b/kernel/time/hrtimer.c +index 93ef7190bdea..2c6be169bdc7 100644 +--- a/kernel/time/hrtimer.c ++++ b/kernel/time/hrtimer.c @@ -48,11 +48,13 @@ #include <linux/sched/rt.h> #include <linux/sched/deadline.h> @@ -21998,7 +23206,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/hrtimer.c linux-4.1.26/kernel/time/hrtim #include "tick-internal.h" -@@ -576,8 +578,7 @@ +@@ -576,8 +578,7 @@ static int hrtimer_reprogram(struct hrtimer *timer, * When the callback is running, we do not reprogram the clock event * device. The timer callback is either running on a different CPU or * the callback is executed in the hrtimer_interrupt context. The @@ -22008,7 +23216,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/hrtimer.c linux-4.1.26/kernel/time/hrtim */ if (hrtimer_callback_running(timer)) return 0; -@@ -621,6 +622,9 @@ +@@ -621,6 +622,9 @@ static int hrtimer_reprogram(struct hrtimer *timer, return res; } @@ -22018,7 +23226,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/hrtimer.c linux-4.1.26/kernel/time/hrtim /* * Initialize the high resolution related parts of cpu_base */ -@@ -630,6 +634,21 @@ +@@ -630,6 +634,21 @@ static inline void hrtimer_init_hres(struct hrtimer_cpu_base *base) base->hres_active = 0; } @@ -22040,7 +23248,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/hrtimer.c linux-4.1.26/kernel/time/hrtim static inline ktime_t hrtimer_update_base(struct hrtimer_cpu_base *base) { ktime_t *offs_real = &base->clock_base[HRTIMER_BASE_REALTIME].offset; -@@ -695,6 +714,44 @@ +@@ -695,6 +714,44 @@ static void clock_was_set_work(struct work_struct *work) static DECLARE_WORK(hrtimer_work, clock_was_set_work); @@ -22085,7 +23293,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/hrtimer.c linux-4.1.26/kernel/time/hrtim /* * Called from timekeeping and resume code to reprogramm the hrtimer * interrupt device on all cpus. -@@ -703,6 +760,7 @@ +@@ -703,6 +760,7 @@ void clock_was_set_delayed(void) { schedule_work(&hrtimer_work); } @@ -22093,7 +23301,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/hrtimer.c linux-4.1.26/kernel/time/hrtim #else -@@ -711,6 +769,13 @@ +@@ -711,6 +769,13 @@ static inline int hrtimer_is_hres_enabled(void) { return 0; } static inline int hrtimer_switch_to_hres(void) { return 0; } static inline void hrtimer_force_reprogram(struct hrtimer_cpu_base *base, int skip_equal) { } @@ -22107,7 +23315,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/hrtimer.c linux-4.1.26/kernel/time/hrtim static inline int hrtimer_reprogram(struct hrtimer *timer, struct hrtimer_clock_base *base) { -@@ -718,7 +783,6 @@ +@@ -718,7 +783,6 @@ static inline int hrtimer_reprogram(struct hrtimer *timer, } static inline void hrtimer_init_hres(struct hrtimer_cpu_base *base) { } static inline void retrigger_next_event(void *arg) { } @@ -22115,7 +23323,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/hrtimer.c linux-4.1.26/kernel/time/hrtim #endif /* CONFIG_HIGH_RES_TIMERS */ /* -@@ -836,6 +900,32 @@ +@@ -836,6 +900,32 @@ u64 hrtimer_forward(struct hrtimer *timer, ktime_t now, ktime_t interval) } EXPORT_SYMBOL_GPL(hrtimer_forward); @@ -22148,7 +23356,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/hrtimer.c linux-4.1.26/kernel/time/hrtim /* * enqueue_hrtimer - internal function to (re)start a timer * -@@ -879,6 +969,11 @@ +@@ -879,6 +969,11 @@ static void __remove_hrtimer(struct hrtimer *timer, if (!(timer->state & HRTIMER_STATE_ENQUEUED)) goto out; @@ -22160,7 +23368,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/hrtimer.c linux-4.1.26/kernel/time/hrtim next_timer = timerqueue_getnext(&base->active); timerqueue_del(&base->active, &timer->node); if (&timer->node == next_timer) { -@@ -966,7 +1061,16 @@ +@@ -966,7 +1061,16 @@ int __hrtimer_start_range_ns(struct hrtimer *timer, ktime_t tim, new_base = switch_hrtimer_base(timer, base, mode & HRTIMER_MODE_PINNED); timer_stats_hrtimer_set_start_info(timer); @@ -22177,7 +23385,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/hrtimer.c linux-4.1.26/kernel/time/hrtim leftmost = enqueue_hrtimer(timer, new_base); if (!leftmost) { -@@ -980,15 +1084,26 @@ +@@ -980,15 +1084,26 @@ int __hrtimer_start_range_ns(struct hrtimer *timer, ktime_t tim, * on dynticks target. */ wake_up_nohz_cpu(new_base->cpu_base->cpu); @@ -22207,7 +23415,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/hrtimer.c linux-4.1.26/kernel/time/hrtim /* * We need to drop cpu_base->lock to avoid a * lock ordering issue vs. rq->lock. -@@ -996,9 +1111,7 @@ +@@ -996,9 +1111,7 @@ int __hrtimer_start_range_ns(struct hrtimer *timer, ktime_t tim, raw_spin_unlock(&new_base->cpu_base->lock); raise_softirq_irqoff(HRTIMER_SOFTIRQ); local_irq_restore(flags); @@ -22218,7 +23426,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/hrtimer.c linux-4.1.26/kernel/time/hrtim } } -@@ -1089,7 +1202,7 @@ +@@ -1089,7 +1202,7 @@ int hrtimer_cancel(struct hrtimer *timer) if (ret >= 0) return ret; @@ -22227,7 +23435,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/hrtimer.c linux-4.1.26/kernel/time/hrtim } } EXPORT_SYMBOL_GPL(hrtimer_cancel); -@@ -1153,6 +1266,7 @@ +@@ -1153,6 +1266,7 @@ static void __hrtimer_init(struct hrtimer *timer, clockid_t clock_id, base = hrtimer_clockid_to_base(clock_id); timer->base = &cpu_base->clock_base[base]; @@ -22235,7 +23443,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/hrtimer.c linux-4.1.26/kernel/time/hrtim timerqueue_init(&timer->node); #ifdef CONFIG_TIMER_STATS -@@ -1236,6 +1350,126 @@ +@@ -1236,6 +1350,126 @@ static void __run_hrtimer(struct hrtimer *timer, ktime_t *now) timer->state &= ~HRTIMER_STATE_CALLBACK; } @@ -22362,7 +23570,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/hrtimer.c linux-4.1.26/kernel/time/hrtim #ifdef CONFIG_HIGH_RES_TIMERS /* -@@ -1246,7 +1480,7 @@ +@@ -1246,7 +1480,7 @@ void hrtimer_interrupt(struct clock_event_device *dev) { struct hrtimer_cpu_base *cpu_base = this_cpu_ptr(&hrtimer_bases); ktime_t expires_next, now, entry_time, delta; @@ -22371,7 +23579,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/hrtimer.c linux-4.1.26/kernel/time/hrtim BUG_ON(!cpu_base->hres_active); cpu_base->nr_events++; -@@ -1281,6 +1515,15 @@ +@@ -1281,6 +1515,15 @@ retry: timer = container_of(node, struct hrtimer, node); @@ -22387,7 +23595,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/hrtimer.c linux-4.1.26/kernel/time/hrtim /* * The immediate goal for using the softexpires is * minimizing wakeups, not running timers at the -@@ -1296,7 +1539,10 @@ +@@ -1296,7 +1539,10 @@ retry: if (basenow.tv64 < hrtimer_get_softexpires_tv64(timer)) break; @@ -22399,7 +23607,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/hrtimer.c linux-4.1.26/kernel/time/hrtim } } /* Reevaluate the clock bases for the next expiry */ -@@ -1313,7 +1559,7 @@ +@@ -1313,7 +1559,7 @@ retry: if (expires_next.tv64 == KTIME_MAX || !tick_program_event(expires_next, 0)) { cpu_base->hang_detected = 0; @@ -22408,7 +23616,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/hrtimer.c linux-4.1.26/kernel/time/hrtim } /* -@@ -1357,6 +1603,9 @@ +@@ -1357,6 +1603,9 @@ retry: tick_program_event(expires_next, 1); printk_once(KERN_WARNING "hrtimer: interrupt took %llu ns\n", ktime_to_ns(delta)); @@ -22418,7 +23626,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/hrtimer.c linux-4.1.26/kernel/time/hrtim } /* -@@ -1392,18 +1641,18 @@ +@@ -1392,18 +1641,18 @@ void hrtimer_peek_ahead_timers(void) __hrtimer_peek_ahead_timers(); local_irq_restore(flags); } @@ -22443,7 +23651,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/hrtimer.c linux-4.1.26/kernel/time/hrtim /* * Called from timer softirq every jiffy, expire hrtimers: * -@@ -1436,7 +1685,7 @@ +@@ -1436,7 +1685,7 @@ void hrtimer_run_queues(void) struct timerqueue_node *node; struct hrtimer_cpu_base *cpu_base = this_cpu_ptr(&hrtimer_bases); struct hrtimer_clock_base *base; @@ -22452,7 +23660,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/hrtimer.c linux-4.1.26/kernel/time/hrtim if (hrtimer_hres_active()) return; -@@ -1461,10 +1710,16 @@ +@@ -1461,10 +1710,16 @@ void hrtimer_run_queues(void) hrtimer_get_expires_tv64(timer)) break; @@ -22470,7 +23678,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/hrtimer.c linux-4.1.26/kernel/time/hrtim } /* -@@ -1486,16 +1741,18 @@ +@@ -1486,16 +1741,18 @@ static enum hrtimer_restart hrtimer_wakeup(struct hrtimer *timer) void hrtimer_init_sleeper(struct hrtimer_sleeper *sl, struct task_struct *task) { sl->timer.function = hrtimer_wakeup; @@ -22491,7 +23699,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/hrtimer.c linux-4.1.26/kernel/time/hrtim hrtimer_start_expires(&t->timer, mode); if (!hrtimer_active(&t->timer)) t->task = NULL; -@@ -1539,7 +1796,8 @@ +@@ -1539,7 +1796,8 @@ long __sched hrtimer_nanosleep_restart(struct restart_block *restart) HRTIMER_MODE_ABS); hrtimer_set_expires_tv64(&t.timer, restart->nanosleep.expires); @@ -22501,7 +23709,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/hrtimer.c linux-4.1.26/kernel/time/hrtim goto out; rmtp = restart->nanosleep.rmtp; -@@ -1556,8 +1814,10 @@ +@@ -1556,8 +1814,10 @@ out: return ret; } @@ -22514,7 +23722,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/hrtimer.c linux-4.1.26/kernel/time/hrtim { struct restart_block *restart; struct hrtimer_sleeper t; -@@ -1570,7 +1830,7 @@ +@@ -1570,7 +1830,7 @@ long hrtimer_nanosleep(struct timespec *rqtp, struct timespec __user *rmtp, hrtimer_init_on_stack(&t.timer, clockid, mode); hrtimer_set_expires_range_ns(&t.timer, timespec_to_ktime(*rqtp), slack); @@ -22523,7 +23731,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/hrtimer.c linux-4.1.26/kernel/time/hrtim goto out; /* Absolute timers do not update the rmtp value and restart: */ -@@ -1597,6 +1857,12 @@ +@@ -1597,6 +1857,12 @@ out: return ret; } @@ -22536,7 +23744,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/hrtimer.c linux-4.1.26/kernel/time/hrtim SYSCALL_DEFINE2(nanosleep, struct timespec __user *, rqtp, struct timespec __user *, rmtp) { -@@ -1611,6 +1877,26 @@ +@@ -1611,6 +1877,26 @@ SYSCALL_DEFINE2(nanosleep, struct timespec __user *, rqtp, return hrtimer_nanosleep(&tu, rmtp, HRTIMER_MODE_REL, CLOCK_MONOTONIC); } @@ -22563,7 +23771,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/hrtimer.c linux-4.1.26/kernel/time/hrtim /* * Functions related to boot-time initialization: */ -@@ -1622,10 +1908,14 @@ +@@ -1622,10 +1908,14 @@ static void init_hrtimers_cpu(int cpu) for (i = 0; i < HRTIMER_MAX_CLOCK_BASES; i++) { cpu_base->clock_base[i].cpu_base = cpu_base; timerqueue_init_head(&cpu_base->clock_base[i].active); @@ -22578,7 +23786,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/hrtimer.c linux-4.1.26/kernel/time/hrtim } #ifdef CONFIG_HOTPLUG_CPU -@@ -1731,9 +2021,7 @@ +@@ -1731,9 +2021,7 @@ void __init hrtimers_init(void) hrtimer_cpu_notify(&hrtimers_nb, (unsigned long)CPU_UP_PREPARE, (void *)(long)smp_processor_id()); register_cpu_notifier(&hrtimers_nb); @@ -22588,10 +23796,11 @@ diff -Nur linux-4.1.26.orig/kernel/time/hrtimer.c linux-4.1.26/kernel/time/hrtim } /** -diff -Nur linux-4.1.26.orig/kernel/time/itimer.c linux-4.1.26/kernel/time/itimer.c ---- linux-4.1.26.orig/kernel/time/itimer.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/time/itimer.c 2016-06-19 15:30:58.711298275 +0200 -@@ -213,6 +213,7 @@ +diff --git a/kernel/time/itimer.c b/kernel/time/itimer.c +index 8d262b467573..d0513909d663 100644 +--- a/kernel/time/itimer.c ++++ b/kernel/time/itimer.c +@@ -213,6 +213,7 @@ again: /* We are sharing ->siglock with it_real_fn() */ if (hrtimer_try_to_cancel(timer) < 0) { spin_unlock_irq(&tsk->sighand->siglock); @@ -22599,10 +23808,11 @@ diff -Nur linux-4.1.26.orig/kernel/time/itimer.c linux-4.1.26/kernel/time/itimer goto again; } expires = timeval_to_ktime(value->it_value); -diff -Nur linux-4.1.26.orig/kernel/time/jiffies.c linux-4.1.26/kernel/time/jiffies.c ---- linux-4.1.26.orig/kernel/time/jiffies.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/time/jiffies.c 2016-06-19 15:30:58.711298275 +0200 -@@ -74,7 +74,8 @@ +diff --git a/kernel/time/jiffies.c b/kernel/time/jiffies.c +index 347fecf86a3f..2ede47408a3e 100644 +--- a/kernel/time/jiffies.c ++++ b/kernel/time/jiffies.c +@@ -74,7 +74,8 @@ static struct clocksource clocksource_jiffies = { .max_cycles = 10, }; @@ -22612,7 +23822,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/jiffies.c linux-4.1.26/kernel/time/jiffi #if (BITS_PER_LONG < 64) u64 get_jiffies_64(void) -@@ -83,9 +84,9 @@ +@@ -83,9 +84,9 @@ u64 get_jiffies_64(void) u64 ret; do { @@ -22624,9 +23834,10 @@ diff -Nur linux-4.1.26.orig/kernel/time/jiffies.c linux-4.1.26/kernel/time/jiffi return ret; } EXPORT_SYMBOL(get_jiffies_64); -diff -Nur linux-4.1.26.orig/kernel/time/ntp.c linux-4.1.26/kernel/time/ntp.c ---- linux-4.1.26.orig/kernel/time/ntp.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/time/ntp.c 2016-06-19 15:30:58.711298275 +0200 +diff --git a/kernel/time/ntp.c b/kernel/time/ntp.c +index 7a681003001c..bd9c53985d32 100644 +--- a/kernel/time/ntp.c ++++ b/kernel/time/ntp.c @@ -10,6 +10,7 @@ #include <linux/workqueue.h> #include <linux/hrtimer.h> @@ -22635,7 +23846,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/ntp.c linux-4.1.26/kernel/time/ntp.c #include <linux/math64.h> #include <linux/timex.h> #include <linux/time.h> -@@ -529,10 +530,52 @@ +@@ -529,10 +530,52 @@ static void sync_cmos_clock(struct work_struct *work) &sync_cmos_work, timespec_to_jiffies(&next)); } @@ -22688,9 +23899,10 @@ diff -Nur linux-4.1.26.orig/kernel/time/ntp.c linux-4.1.26/kernel/time/ntp.c #else void ntp_notify_cmos_timer(void) { } -diff -Nur linux-4.1.26.orig/kernel/time/posix-cpu-timers.c linux-4.1.26/kernel/time/posix-cpu-timers.c ---- linux-4.1.26.orig/kernel/time/posix-cpu-timers.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/time/posix-cpu-timers.c 2016-06-19 15:30:58.711298275 +0200 +diff --git a/kernel/time/posix-cpu-timers.c b/kernel/time/posix-cpu-timers.c +index 57d1acb91c56..5b24aefef595 100644 +--- a/kernel/time/posix-cpu-timers.c ++++ b/kernel/time/posix-cpu-timers.c @@ -3,6 +3,7 @@ */ @@ -22699,7 +23911,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/posix-cpu-timers.c linux-4.1.26/kernel/t #include <linux/posix-timers.h> #include <linux/errno.h> #include <linux/math64.h> -@@ -626,7 +627,7 @@ +@@ -626,7 +627,7 @@ static int posix_cpu_timer_set(struct k_itimer *timer, int timer_flags, /* * Disarm any old timer after extracting its expiry time. */ @@ -22708,7 +23920,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/posix-cpu-timers.c linux-4.1.26/kernel/t ret = 0; old_incr = timer->it.cpu.incr; -@@ -1047,7 +1048,7 @@ +@@ -1048,7 +1049,7 @@ void posix_cpu_timer_schedule(struct k_itimer *timer) /* * Now re-arm for the new expiry time. */ @@ -22717,7 +23929,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/posix-cpu-timers.c linux-4.1.26/kernel/t arm_timer(timer); unlock_task_sighand(p, &flags); -@@ -1113,10 +1114,11 @@ +@@ -1114,10 +1115,11 @@ static inline int fastpath_timer_check(struct task_struct *tsk) sig = tsk->signal; if (sig->cputimer.running) { struct task_cputime group_sample; @@ -22731,7 +23943,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/posix-cpu-timers.c linux-4.1.26/kernel/t if (task_cputime_expired(&group_sample, &sig->cputime_expires)) return 1; -@@ -1130,13 +1132,13 @@ +@@ -1131,13 +1133,13 @@ static inline int fastpath_timer_check(struct task_struct *tsk) * already updated our counts. We need to check if any timers fire now. * Interrupts are disabled. */ @@ -22747,7 +23959,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/posix-cpu-timers.c linux-4.1.26/kernel/t /* * The fast path checks that there are no expired thread or thread -@@ -1194,6 +1196,190 @@ +@@ -1195,6 +1197,190 @@ void run_posix_cpu_timers(struct task_struct *tsk) } } @@ -22938,10 +24150,11 @@ diff -Nur linux-4.1.26.orig/kernel/time/posix-cpu-timers.c linux-4.1.26/kernel/t /* * Set one of the process-wide special case CPU timers or RLIMIT_CPU. * The tsk->sighand->siglock must be held by the caller. -diff -Nur linux-4.1.26.orig/kernel/time/posix-timers.c linux-4.1.26/kernel/time/posix-timers.c ---- linux-4.1.26.orig/kernel/time/posix-timers.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/time/posix-timers.c 2016-06-19 15:30:58.711298275 +0200 -@@ -499,6 +499,7 @@ +diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c +index 31ea01f42e1f..0f5d7eae61f0 100644 +--- a/kernel/time/posix-timers.c ++++ b/kernel/time/posix-timers.c +@@ -499,6 +499,7 @@ static enum hrtimer_restart posix_timer_fn(struct hrtimer *timer) static struct pid *good_sigevent(sigevent_t * event) { struct task_struct *rtn = current->group_leader; @@ -22949,7 +24162,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/posix-timers.c linux-4.1.26/kernel/time/ if ((event->sigev_notify & SIGEV_THREAD_ID ) && (!(rtn = find_task_by_vpid(event->sigev_notify_thread_id)) || -@@ -507,7 +508,8 @@ +@@ -507,7 +508,8 @@ static struct pid *good_sigevent(sigevent_t * event) return NULL; if (((event->sigev_notify & ~SIGEV_THREAD_ID) != SIGEV_NONE) && @@ -22959,7 +24172,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/posix-timers.c linux-4.1.26/kernel/time/ return NULL; return task_pid(rtn); -@@ -819,6 +821,20 @@ +@@ -819,6 +821,20 @@ SYSCALL_DEFINE1(timer_getoverrun, timer_t, timer_id) return overrun; } @@ -22980,7 +24193,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/posix-timers.c linux-4.1.26/kernel/time/ /* Set a POSIX.1b interval timer. */ /* timr->it_lock is taken. */ static int -@@ -896,6 +912,7 @@ +@@ -896,6 +912,7 @@ retry: if (!timr) return -EINVAL; @@ -22988,7 +24201,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/posix-timers.c linux-4.1.26/kernel/time/ kc = clockid_to_kclock(timr->it_clock); if (WARN_ON_ONCE(!kc || !kc->timer_set)) error = -EINVAL; -@@ -904,9 +921,12 @@ +@@ -904,9 +921,12 @@ retry: unlock_timer(timr, flag); if (error == TIMER_RETRY) { @@ -23001,7 +24214,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/posix-timers.c linux-4.1.26/kernel/time/ if (old_setting && !error && copy_to_user(old_setting, &old_spec, sizeof (old_spec))) -@@ -944,10 +964,15 @@ +@@ -944,10 +964,15 @@ retry_delete: if (!timer) return -EINVAL; @@ -23017,7 +24230,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/posix-timers.c linux-4.1.26/kernel/time/ spin_lock(¤t->sighand->siglock); list_del(&timer->list); -@@ -973,8 +998,18 @@ +@@ -973,8 +998,18 @@ static void itimer_delete(struct k_itimer *timer) retry_delete: spin_lock_irqsave(&timer->it_lock, flags); @@ -23036,20 +24249,22 @@ diff -Nur linux-4.1.26.orig/kernel/time/posix-timers.c linux-4.1.26/kernel/time/ goto retry_delete; } list_del(&timer->list); -diff -Nur linux-4.1.26.orig/kernel/time/tick-broadcast-hrtimer.c linux-4.1.26/kernel/time/tick-broadcast-hrtimer.c ---- linux-4.1.26.orig/kernel/time/tick-broadcast-hrtimer.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/time/tick-broadcast-hrtimer.c 2016-06-19 15:30:58.711298275 +0200 -@@ -109,5 +109,6 @@ +diff --git a/kernel/time/tick-broadcast-hrtimer.c b/kernel/time/tick-broadcast-hrtimer.c +index 6aac4beedbbe..943c03395e46 100644 +--- a/kernel/time/tick-broadcast-hrtimer.c ++++ b/kernel/time/tick-broadcast-hrtimer.c +@@ -109,5 +109,6 @@ void tick_setup_hrtimer_broadcast(void) { hrtimer_init(&bctimer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); bctimer.function = bc_handler; + bctimer.irqsafe = true; clockevents_register_device(&ce_broadcast_hrtimer); } -diff -Nur linux-4.1.26.orig/kernel/time/tick-common.c linux-4.1.26/kernel/time/tick-common.c ---- linux-4.1.26.orig/kernel/time/tick-common.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/time/tick-common.c 2016-06-19 15:30:58.711298275 +0200 -@@ -78,13 +78,15 @@ +diff --git a/kernel/time/tick-common.c b/kernel/time/tick-common.c +index 3ae6afa1eb98..14a10917c8a3 100644 +--- a/kernel/time/tick-common.c ++++ b/kernel/time/tick-common.c +@@ -78,13 +78,15 @@ int tick_is_oneshot_available(void) static void tick_periodic(int cpu) { if (tick_do_timer_cpu == cpu) { @@ -23067,7 +24282,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/tick-common.c linux-4.1.26/kernel/time/t update_wall_time(); } -@@ -146,9 +148,9 @@ +@@ -146,9 +148,9 @@ void tick_setup_periodic(struct clock_event_device *dev, int broadcast) ktime_t next; do { @@ -23079,10 +24294,11 @@ diff -Nur linux-4.1.26.orig/kernel/time/tick-common.c linux-4.1.26/kernel/time/t clockevents_set_state(dev, CLOCK_EVT_STATE_ONESHOT); -diff -Nur linux-4.1.26.orig/kernel/time/tick-sched.c linux-4.1.26/kernel/time/tick-sched.c ---- linux-4.1.26.orig/kernel/time/tick-sched.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/time/tick-sched.c 2016-06-19 15:30:58.711298275 +0200 -@@ -62,7 +62,8 @@ +diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c +index 914259128145..b3841ba00c69 100644 +--- a/kernel/time/tick-sched.c ++++ b/kernel/time/tick-sched.c +@@ -62,7 +62,8 @@ static void tick_do_update_jiffies64(ktime_t now) return; /* Reevalute with jiffies_lock held */ @@ -23092,7 +24308,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/tick-sched.c linux-4.1.26/kernel/time/ti delta = ktime_sub(now, last_jiffies_update); if (delta.tv64 >= tick_period.tv64) { -@@ -85,10 +86,12 @@ +@@ -85,10 +86,12 @@ static void tick_do_update_jiffies64(ktime_t now) /* Keep the tick_next_period variable up to date */ tick_next_period = ktime_add(last_jiffies_update, tick_period); } else { @@ -23107,7 +24323,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/tick-sched.c linux-4.1.26/kernel/time/ti update_wall_time(); } -@@ -99,12 +102,14 @@ +@@ -99,12 +102,14 @@ static ktime_t tick_init_jiffy_update(void) { ktime_t period; @@ -23124,7 +24340,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/tick-sched.c linux-4.1.26/kernel/time/ti return period; } -@@ -176,6 +181,11 @@ +@@ -176,6 +181,11 @@ static bool can_stop_full_tick(void) return false; } @@ -23136,7 +24352,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/tick-sched.c linux-4.1.26/kernel/time/ti /* sched_clock_tick() needs us? */ #ifdef CONFIG_HAVE_UNSTABLE_SCHED_CLOCK /* -@@ -222,6 +232,7 @@ +@@ -222,6 +232,7 @@ static void nohz_full_kick_work_func(struct irq_work *work) static DEFINE_PER_CPU(struct irq_work, nohz_full_kick_work) = { .func = nohz_full_kick_work_func, @@ -23144,7 +24360,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/tick-sched.c linux-4.1.26/kernel/time/ti }; /* -@@ -578,10 +589,10 @@ +@@ -578,10 +589,10 @@ static ktime_t tick_nohz_stop_sched_tick(struct tick_sched *ts, /* Read jiffies and the time when jiffies were updated last */ do { @@ -23157,7 +24373,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/tick-sched.c linux-4.1.26/kernel/time/ti if (rcu_needs_cpu(&rcu_delta_jiffies) || arch_needs_cpu() || irq_work_needs_cpu()) { -@@ -759,14 +770,7 @@ +@@ -759,14 +770,7 @@ static bool can_stop_idle_tick(int cpu, struct tick_sched *ts) return false; if (unlikely(local_softirq_pending() && cpu_online(cpu))) { @@ -23173,7 +24389,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/tick-sched.c linux-4.1.26/kernel/time/ti return false; } -@@ -1154,6 +1158,7 @@ +@@ -1154,6 +1158,7 @@ void tick_setup_sched_timer(void) * Emulate tick processing via per-CPU hrtimers: */ hrtimer_init(&ts->sched_timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); @@ -23181,10 +24397,11 @@ diff -Nur linux-4.1.26.orig/kernel/time/tick-sched.c linux-4.1.26/kernel/time/ti ts->sched_timer.function = tick_sched_timer; /* Get the next period (per cpu) */ -diff -Nur linux-4.1.26.orig/kernel/time/timekeeping.c linux-4.1.26/kernel/time/timekeeping.c ---- linux-4.1.26.orig/kernel/time/timekeeping.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/time/timekeeping.c 2016-06-19 15:30:58.711298275 +0200 -@@ -2064,8 +2064,10 @@ +diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c +index d9f112bd42a7..7713b181ccfa 100644 +--- a/kernel/time/timekeeping.c ++++ b/kernel/time/timekeeping.c +@@ -2087,8 +2087,10 @@ EXPORT_SYMBOL(hardpps); */ void xtime_update(unsigned long ticks) { @@ -23197,10 +24414,11 @@ diff -Nur linux-4.1.26.orig/kernel/time/timekeeping.c linux-4.1.26/kernel/time/t + raw_spin_unlock(&jiffies_lock); update_wall_time(); } -diff -Nur linux-4.1.26.orig/kernel/time/timekeeping.h linux-4.1.26/kernel/time/timekeeping.h ---- linux-4.1.26.orig/kernel/time/timekeeping.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/time/timekeeping.h 2016-06-19 15:30:58.711298275 +0200 -@@ -22,7 +22,8 @@ +diff --git a/kernel/time/timekeeping.h b/kernel/time/timekeeping.h +index ead8794b9a4e..d7a9120a9f52 100644 +--- a/kernel/time/timekeeping.h ++++ b/kernel/time/timekeeping.h +@@ -22,7 +22,8 @@ extern void timekeeping_resume(void); extern void do_timer(unsigned long ticks); extern void update_wall_time(void); @@ -23210,10 +24428,11 @@ diff -Nur linux-4.1.26.orig/kernel/time/timekeeping.h linux-4.1.26/kernel/time/t #define CS_NAME_LEN 32 -diff -Nur linux-4.1.26.orig/kernel/time/timer.c linux-4.1.26/kernel/time/timer.c ---- linux-4.1.26.orig/kernel/time/timer.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/time/timer.c 2016-06-19 15:30:58.711298275 +0200 -@@ -78,6 +78,9 @@ +diff --git a/kernel/time/timer.c b/kernel/time/timer.c +index 2ece3aa5069c..b1f9e6c5bec4 100644 +--- a/kernel/time/timer.c ++++ b/kernel/time/timer.c +@@ -78,6 +78,9 @@ struct tvec_root { struct tvec_base { spinlock_t lock; struct timer_list *running_timer; @@ -23223,7 +24442,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/timer.c linux-4.1.26/kernel/time/timer.c unsigned long timer_jiffies; unsigned long next_timer; unsigned long active_timers; -@@ -768,6 +771,36 @@ +@@ -768,6 +771,36 @@ static struct tvec_base *lock_timer_base(struct timer_list *timer, } } @@ -23260,7 +24479,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/timer.c linux-4.1.26/kernel/time/timer.c static inline int __mod_timer(struct timer_list *timer, unsigned long expires, bool pending_only, int pinned) -@@ -798,14 +831,8 @@ +@@ -798,14 +831,8 @@ __mod_timer(struct timer_list *timer, unsigned long expires, * handler yet has not finished. This also guarantees that * the timer is serialized wrt itself. */ @@ -23277,7 +24496,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/timer.c linux-4.1.26/kernel/time/timer.c } timer->expires = expires; -@@ -979,6 +1006,29 @@ +@@ -979,6 +1006,29 @@ void add_timer_on(struct timer_list *timer, int cpu) } EXPORT_SYMBOL_GPL(add_timer_on); @@ -23294,7 +24513,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/timer.c linux-4.1.26/kernel/time/timer.c + base->running_timer != timer); +} + -+# define wakeup_timer_waiters(b) wake_up(&(b)->wait_for_running_timer) ++# define wakeup_timer_waiters(b) wake_up_all(&(b)->wait_for_running_timer) +#else +static inline void wait_for_running_timer(struct timer_list *timer) +{ @@ -23307,7 +24526,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/timer.c linux-4.1.26/kernel/time/timer.c /** * del_timer - deactive a timer. * @timer: the timer to be deactivated -@@ -1036,7 +1086,7 @@ +@@ -1036,7 +1086,7 @@ int try_to_del_timer_sync(struct timer_list *timer) } EXPORT_SYMBOL(try_to_del_timer_sync); @@ -23316,7 +24535,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/timer.c linux-4.1.26/kernel/time/timer.c static DEFINE_PER_CPU(struct tvec_base, __tvec_bases); /** -@@ -1098,7 +1148,7 @@ +@@ -1098,7 +1148,7 @@ int del_timer_sync(struct timer_list *timer) int ret = try_to_del_timer_sync(timer); if (ret >= 0) return ret; @@ -23325,7 +24544,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/timer.c linux-4.1.26/kernel/time/timer.c } } EXPORT_SYMBOL(del_timer_sync); -@@ -1219,15 +1269,17 @@ +@@ -1219,16 +1269,18 @@ static inline void __run_timers(struct tvec_base *base) if (irqsafe) { spin_unlock(&base->lock); call_timer_fn(timer, fn, data); @@ -23340,11 +24559,12 @@ diff -Nur linux-4.1.26.orig/kernel/time/timer.c linux-4.1.26/kernel/time/timer.c } } - base->running_timer = NULL; -+ wakeup_timer_waiters(base); spin_unlock_irq(&base->lock); ++ wakeup_timer_waiters(base); } -@@ -1367,6 +1419,14 @@ + #ifdef CONFIG_NO_HZ_COMMON +@@ -1367,6 +1419,14 @@ unsigned long get_next_timer_interrupt(unsigned long now) if (cpu_is_offline(smp_processor_id())) return expires; @@ -23359,7 +24579,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/timer.c linux-4.1.26/kernel/time/timer.c spin_lock(&base->lock); if (base->active_timers) { if (time_before_eq(base->next_timer, base->timer_jiffies)) -@@ -1392,13 +1452,13 @@ +@@ -1392,13 +1452,13 @@ void update_process_times(int user_tick) /* Note: this timer irq context must be accounted for as well. */ account_process_tick(p, user_tick); @@ -23375,7 +24595,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/timer.c linux-4.1.26/kernel/time/timer.c run_posix_cpu_timers(p); } -@@ -1411,6 +1471,8 @@ +@@ -1411,6 +1471,8 @@ static void run_timer_softirq(struct softirq_action *h) hrtimer_run_pending(); @@ -23384,7 +24604,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/timer.c linux-4.1.26/kernel/time/timer.c if (time_after_eq(jiffies, base->timer_jiffies)) __run_timers(base); } -@@ -1566,7 +1628,7 @@ +@@ -1566,7 +1628,7 @@ static void migrate_timers(int cpu) BUG_ON(cpu_online(cpu)); old_base = per_cpu(tvec_bases, cpu); @@ -23393,7 +24613,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/timer.c linux-4.1.26/kernel/time/timer.c /* * The caller is globally serialized and nobody else * takes two locks at once, deadlock is not possible. -@@ -1590,7 +1652,7 @@ +@@ -1590,7 +1652,7 @@ static void migrate_timers(int cpu) spin_unlock(&old_base->lock); spin_unlock_irq(&new_base->lock); @@ -23402,7 +24622,7 @@ diff -Nur linux-4.1.26.orig/kernel/time/timer.c linux-4.1.26/kernel/time/timer.c } static int timer_cpu_notify(struct notifier_block *self, -@@ -1625,6 +1687,9 @@ +@@ -1625,6 +1687,9 @@ static void __init init_timer_cpu(struct tvec_base *base, int cpu) base->cpu = cpu; per_cpu(tvec_bases, cpu) = base; spin_lock_init(&base->lock); @@ -23412,10 +24632,11 @@ diff -Nur linux-4.1.26.orig/kernel/time/timer.c linux-4.1.26/kernel/time/timer.c for (j = 0; j < TVN_SIZE; j++) { INIT_LIST_HEAD(base->tv5.vec + j); -diff -Nur linux-4.1.26.orig/kernel/trace/Kconfig linux-4.1.26/kernel/trace/Kconfig ---- linux-4.1.26.orig/kernel/trace/Kconfig 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/trace/Kconfig 2016-06-19 15:30:58.711298275 +0200 -@@ -187,6 +187,24 @@ +diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig +index 3b9a48ae153a..ab3a277a3c20 100644 +--- a/kernel/trace/Kconfig ++++ b/kernel/trace/Kconfig +@@ -187,6 +187,24 @@ config IRQSOFF_TRACER enabled. This option and the preempt-off timing option can be used together or separately.) @@ -23440,7 +24661,7 @@ diff -Nur linux-4.1.26.orig/kernel/trace/Kconfig linux-4.1.26/kernel/trace/Kconf config PREEMPT_TRACER bool "Preemption-off Latency Tracer" default n -@@ -211,6 +229,24 @@ +@@ -211,6 +229,24 @@ config PREEMPT_TRACER enabled. This option and the irqs-off timing option can be used together or separately.) @@ -23465,7 +24686,7 @@ diff -Nur linux-4.1.26.orig/kernel/trace/Kconfig linux-4.1.26/kernel/trace/Kconf config SCHED_TRACER bool "Scheduling Latency Tracer" select GENERIC_TRACER -@@ -221,6 +257,74 @@ +@@ -221,6 +257,74 @@ config SCHED_TRACER This tracer tracks the latency of the highest priority task to be scheduled in, starting from the point it has woken up. @@ -23540,9 +24761,26 @@ diff -Nur linux-4.1.26.orig/kernel/trace/Kconfig linux-4.1.26/kernel/trace/Kconf config ENABLE_DEFAULT_TRACERS bool "Trace process context switches and events" depends on !GENERIC_TRACER -diff -Nur linux-4.1.26.orig/kernel/trace/latency_hist.c linux-4.1.26/kernel/trace/latency_hist.c ---- linux-4.1.26.orig/kernel/trace/latency_hist.c 1970-01-01 01:00:00.000000000 +0100 -+++ linux-4.1.26/kernel/trace/latency_hist.c 2016-06-19 15:30:58.715298429 +0200 +diff --git a/kernel/trace/Makefile b/kernel/trace/Makefile +index 9b1044e936a6..3bbaea06824a 100644 +--- a/kernel/trace/Makefile ++++ b/kernel/trace/Makefile +@@ -36,6 +36,10 @@ obj-$(CONFIG_FUNCTION_TRACER) += trace_functions.o + obj-$(CONFIG_IRQSOFF_TRACER) += trace_irqsoff.o + obj-$(CONFIG_PREEMPT_TRACER) += trace_irqsoff.o + obj-$(CONFIG_SCHED_TRACER) += trace_sched_wakeup.o ++obj-$(CONFIG_INTERRUPT_OFF_HIST) += latency_hist.o ++obj-$(CONFIG_PREEMPT_OFF_HIST) += latency_hist.o ++obj-$(CONFIG_WAKEUP_LATENCY_HIST) += latency_hist.o ++obj-$(CONFIG_MISSED_TIMER_OFFSETS_HIST) += latency_hist.o + obj-$(CONFIG_NOP_TRACER) += trace_nop.o + obj-$(CONFIG_STACK_TRACER) += trace_stack.o + obj-$(CONFIG_MMIOTRACE) += trace_mmiotrace.o +diff --git a/kernel/trace/latency_hist.c b/kernel/trace/latency_hist.c +new file mode 100644 +index 000000000000..b6c1d14b71c4 +--- /dev/null ++++ b/kernel/trace/latency_hist.c @@ -0,0 +1,1178 @@ +/* + * kernel/trace/latency_hist.c @@ -24722,24 +25960,11 @@ diff -Nur linux-4.1.26.orig/kernel/trace/latency_hist.c linux-4.1.26/kernel/trac +} + +device_initcall(latency_hist_init); -diff -Nur linux-4.1.26.orig/kernel/trace/Makefile linux-4.1.26/kernel/trace/Makefile ---- linux-4.1.26.orig/kernel/trace/Makefile 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/trace/Makefile 2016-06-19 15:30:58.715298429 +0200 -@@ -36,6 +36,10 @@ - obj-$(CONFIG_IRQSOFF_TRACER) += trace_irqsoff.o - obj-$(CONFIG_PREEMPT_TRACER) += trace_irqsoff.o - obj-$(CONFIG_SCHED_TRACER) += trace_sched_wakeup.o -+obj-$(CONFIG_INTERRUPT_OFF_HIST) += latency_hist.o -+obj-$(CONFIG_PREEMPT_OFF_HIST) += latency_hist.o -+obj-$(CONFIG_WAKEUP_LATENCY_HIST) += latency_hist.o -+obj-$(CONFIG_MISSED_TIMER_OFFSETS_HIST) += latency_hist.o - obj-$(CONFIG_NOP_TRACER) += trace_nop.o - obj-$(CONFIG_STACK_TRACER) += trace_stack.o - obj-$(CONFIG_MMIOTRACE) += trace_mmiotrace.o -diff -Nur linux-4.1.26.orig/kernel/trace/trace.c linux-4.1.26/kernel/trace/trace.c ---- linux-4.1.26.orig/kernel/trace/trace.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/trace/trace.c 2016-06-19 15:30:58.715298429 +0200 -@@ -1630,6 +1630,7 @@ +diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c +index 61ea7e8cdde5..af8b5e5469bf 100644 +--- a/kernel/trace/trace.c ++++ b/kernel/trace/trace.c +@@ -1630,6 +1630,7 @@ tracing_generic_entry_update(struct trace_entry *entry, unsigned long flags, struct task_struct *tsk = current; entry->preempt_count = pc & 0xff; @@ -24747,7 +25972,7 @@ diff -Nur linux-4.1.26.orig/kernel/trace/trace.c linux-4.1.26/kernel/trace/trace entry->pid = (tsk) ? tsk->pid : 0; entry->flags = #ifdef CONFIG_TRACE_IRQFLAGS_SUPPORT -@@ -1639,8 +1640,11 @@ +@@ -1639,8 +1640,11 @@ tracing_generic_entry_update(struct trace_entry *entry, unsigned long flags, #endif ((pc & HARDIRQ_MASK) ? TRACE_FLAG_HARDIRQ : 0) | ((pc & SOFTIRQ_MASK) ? TRACE_FLAG_SOFTIRQ : 0) | @@ -24760,7 +25985,7 @@ diff -Nur linux-4.1.26.orig/kernel/trace/trace.c linux-4.1.26/kernel/trace/trace } EXPORT_SYMBOL_GPL(tracing_generic_entry_update); -@@ -2558,14 +2562,17 @@ +@@ -2558,14 +2562,17 @@ get_total_entries(struct trace_buffer *buf, static void print_lat_help_header(struct seq_file *m) { @@ -24786,7 +26011,7 @@ diff -Nur linux-4.1.26.orig/kernel/trace/trace.c linux-4.1.26/kernel/trace/trace } static void print_event_info(struct trace_buffer *buf, struct seq_file *m) -@@ -2591,11 +2598,14 @@ +@@ -2591,11 +2598,14 @@ static void print_func_help_header_irq(struct trace_buffer *buf, struct seq_file print_event_info(buf, m); seq_puts(m, "# _-----=> irqs-off\n" "# / _----=> need-resched\n" @@ -24806,22 +26031,11 @@ diff -Nur linux-4.1.26.orig/kernel/trace/trace.c linux-4.1.26/kernel/trace/trace } void -diff -Nur linux-4.1.26.orig/kernel/trace/trace_events.c linux-4.1.26/kernel/trace/trace_events.c ---- linux-4.1.26.orig/kernel/trace/trace_events.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/trace/trace_events.c 2016-06-19 15:30:58.715298429 +0200 -@@ -162,6 +162,8 @@ - __common_field(unsigned char, flags); - __common_field(unsigned char, preempt_count); - __common_field(int, pid); -+ __common_field(unsigned short, migrate_disable); -+ __common_field(unsigned short, padding); - - return ret; - } -diff -Nur linux-4.1.26.orig/kernel/trace/trace.h linux-4.1.26/kernel/trace/trace.h ---- linux-4.1.26.orig/kernel/trace/trace.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/trace/trace.h 2016-06-19 15:30:58.715298429 +0200 -@@ -120,6 +120,7 @@ +diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h +index 921691c5cb04..c0f3c568cac8 100644 +--- a/kernel/trace/trace.h ++++ b/kernel/trace/trace.h +@@ -120,6 +120,7 @@ struct kretprobe_trace_entry_head { * NEED_RESCHED - reschedule is requested * HARDIRQ - inside an interrupt handler * SOFTIRQ - inside a softirq handler @@ -24829,7 +26043,7 @@ diff -Nur linux-4.1.26.orig/kernel/trace/trace.h linux-4.1.26/kernel/trace/trace */ enum trace_flag_type { TRACE_FLAG_IRQS_OFF = 0x01, -@@ -128,6 +129,7 @@ +@@ -128,6 +129,7 @@ enum trace_flag_type { TRACE_FLAG_HARDIRQ = 0x08, TRACE_FLAG_SOFTIRQ = 0x10, TRACE_FLAG_PREEMPT_RESCHED = 0x20, @@ -24837,9 +26051,38 @@ diff -Nur linux-4.1.26.orig/kernel/trace/trace.h linux-4.1.26/kernel/trace/trace }; #define TRACE_BUF_SIZE 1024 -diff -Nur linux-4.1.26.orig/kernel/trace/trace_irqsoff.c linux-4.1.26/kernel/trace/trace_irqsoff.c ---- linux-4.1.26.orig/kernel/trace/trace_irqsoff.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/trace/trace_irqsoff.c 2016-06-19 15:30:58.715298429 +0200 +diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c +index 6459f77e2c72..b83d6a4d3912 100644 +--- a/kernel/trace/trace_events.c ++++ b/kernel/trace/trace_events.c +@@ -162,6 +162,8 @@ static int trace_define_common_fields(void) + __common_field(unsigned char, flags); + __common_field(unsigned char, preempt_count); + __common_field(int, pid); ++ __common_field(unsigned short, migrate_disable); ++ __common_field(unsigned short, padding); + + return ret; + } +@@ -198,6 +200,14 @@ void *ftrace_event_buffer_reserve(struct ftrace_event_buffer *fbuffer, + + local_save_flags(fbuffer->flags); + fbuffer->pc = preempt_count(); ++ /* ++ * If CONFIG_PREEMPT is enabled, then the tracepoint itself disables ++ * preemption (adding one to the preempt_count). Since we are ++ * interested in the preempt_count at the time the tracepoint was ++ * hit, we need to subtract one to offset the increment. ++ */ ++ if (IS_ENABLED(CONFIG_PREEMPT)) ++ fbuffer->pc--; + fbuffer->ftrace_file = ftrace_file; + + fbuffer->event = +diff --git a/kernel/trace/trace_irqsoff.c b/kernel/trace/trace_irqsoff.c +index 8523ea345f2b..0f2d3e3545e8 100644 +--- a/kernel/trace/trace_irqsoff.c ++++ b/kernel/trace/trace_irqsoff.c @@ -13,6 +13,7 @@ #include <linux/uaccess.h> #include <linux/module.h> @@ -24848,7 +26091,7 @@ diff -Nur linux-4.1.26.orig/kernel/trace/trace_irqsoff.c linux-4.1.26/kernel/tra #include "trace.h" -@@ -433,11 +434,13 @@ +@@ -433,11 +434,13 @@ void start_critical_timings(void) { if (preempt_trace() || irq_trace()) start_critical_timing(CALLER_ADDR0, CALLER_ADDR1); @@ -24862,7 +26105,7 @@ diff -Nur linux-4.1.26.orig/kernel/trace/trace_irqsoff.c linux-4.1.26/kernel/tra if (preempt_trace() || irq_trace()) stop_critical_timing(CALLER_ADDR0, CALLER_ADDR1); } -@@ -447,6 +450,7 @@ +@@ -447,6 +450,7 @@ EXPORT_SYMBOL_GPL(stop_critical_timings); #ifdef CONFIG_PROVE_LOCKING void time_hardirqs_on(unsigned long a0, unsigned long a1) { @@ -24870,7 +26113,7 @@ diff -Nur linux-4.1.26.orig/kernel/trace/trace_irqsoff.c linux-4.1.26/kernel/tra if (!preempt_trace() && irq_trace()) stop_critical_timing(a0, a1); } -@@ -455,6 +459,7 @@ +@@ -455,6 +459,7 @@ void time_hardirqs_off(unsigned long a0, unsigned long a1) { if (!preempt_trace() && irq_trace()) start_critical_timing(a0, a1); @@ -24878,7 +26121,7 @@ diff -Nur linux-4.1.26.orig/kernel/trace/trace_irqsoff.c linux-4.1.26/kernel/tra } #else /* !CONFIG_PROVE_LOCKING */ -@@ -480,6 +485,7 @@ +@@ -480,6 +485,7 @@ inline void print_irqtrace_events(struct task_struct *curr) */ void trace_hardirqs_on(void) { @@ -24886,7 +26129,7 @@ diff -Nur linux-4.1.26.orig/kernel/trace/trace_irqsoff.c linux-4.1.26/kernel/tra if (!preempt_trace() && irq_trace()) stop_critical_timing(CALLER_ADDR0, CALLER_ADDR1); } -@@ -489,11 +495,13 @@ +@@ -489,11 +495,13 @@ void trace_hardirqs_off(void) { if (!preempt_trace() && irq_trace()) start_critical_timing(CALLER_ADDR0, CALLER_ADDR1); @@ -24900,7 +26143,7 @@ diff -Nur linux-4.1.26.orig/kernel/trace/trace_irqsoff.c linux-4.1.26/kernel/tra if (!preempt_trace() && irq_trace()) stop_critical_timing(CALLER_ADDR0, caller_addr); } -@@ -503,6 +511,7 @@ +@@ -503,6 +511,7 @@ __visible void trace_hardirqs_off_caller(unsigned long caller_addr) { if (!preempt_trace() && irq_trace()) start_critical_timing(CALLER_ADDR0, caller_addr); @@ -24908,7 +26151,7 @@ diff -Nur linux-4.1.26.orig/kernel/trace/trace_irqsoff.c linux-4.1.26/kernel/tra } EXPORT_SYMBOL(trace_hardirqs_off_caller); -@@ -512,12 +521,14 @@ +@@ -512,12 +521,14 @@ EXPORT_SYMBOL(trace_hardirqs_off_caller); #ifdef CONFIG_PREEMPT_TRACER void trace_preempt_on(unsigned long a0, unsigned long a1) { @@ -24923,10 +26166,11 @@ diff -Nur linux-4.1.26.orig/kernel/trace/trace_irqsoff.c linux-4.1.26/kernel/tra if (preempt_trace() && !irq_trace()) start_critical_timing(a0, a1); } -diff -Nur linux-4.1.26.orig/kernel/trace/trace_output.c linux-4.1.26/kernel/trace/trace_output.c ---- linux-4.1.26.orig/kernel/trace/trace_output.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/trace/trace_output.c 2016-06-19 15:30:58.715298429 +0200 -@@ -430,6 +430,7 @@ +diff --git a/kernel/trace/trace_output.c b/kernel/trace/trace_output.c +index 25a086bcb700..c86bed27213f 100644 +--- a/kernel/trace/trace_output.c ++++ b/kernel/trace/trace_output.c +@@ -430,6 +430,7 @@ int trace_print_lat_fmt(struct trace_seq *s, struct trace_entry *entry) { char hardsoft_irq; char need_resched; @@ -24934,7 +26178,7 @@ diff -Nur linux-4.1.26.orig/kernel/trace/trace_output.c linux-4.1.26/kernel/trac char irqs_off; int hardirq; int softirq; -@@ -457,6 +458,8 @@ +@@ -457,6 +458,8 @@ int trace_print_lat_fmt(struct trace_seq *s, struct trace_entry *entry) need_resched = '.'; break; } @@ -24943,7 +26187,7 @@ diff -Nur linux-4.1.26.orig/kernel/trace/trace_output.c linux-4.1.26/kernel/trac hardsoft_irq = (hardirq && softirq) ? 'H' : -@@ -464,14 +467,25 @@ +@@ -464,14 +467,25 @@ int trace_print_lat_fmt(struct trace_seq *s, struct trace_entry *entry) softirq ? 's' : '.'; @@ -24971,10 +26215,11 @@ diff -Nur linux-4.1.26.orig/kernel/trace/trace_output.c linux-4.1.26/kernel/trac return !trace_seq_has_overflowed(s); } -diff -Nur linux-4.1.26.orig/kernel/trace/trace_sched_switch.c linux-4.1.26/kernel/trace/trace_sched_switch.c ---- linux-4.1.26.orig/kernel/trace/trace_sched_switch.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/trace/trace_sched_switch.c 2016-06-19 15:30:58.715298429 +0200 -@@ -26,7 +26,7 @@ +diff --git a/kernel/trace/trace_sched_switch.c b/kernel/trace/trace_sched_switch.c +index 419ca37e72c9..f270088e9929 100644 +--- a/kernel/trace/trace_sched_switch.c ++++ b/kernel/trace/trace_sched_switch.c +@@ -26,7 +26,7 @@ probe_sched_switch(void *ignore, struct task_struct *prev, struct task_struct *n } static void @@ -24983,10 +26228,11 @@ diff -Nur linux-4.1.26.orig/kernel/trace/trace_sched_switch.c linux-4.1.26/kerne { if (unlikely(!sched_ref)) return; -diff -Nur linux-4.1.26.orig/kernel/trace/trace_sched_wakeup.c linux-4.1.26/kernel/trace/trace_sched_wakeup.c ---- linux-4.1.26.orig/kernel/trace/trace_sched_wakeup.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/trace/trace_sched_wakeup.c 2016-06-19 15:30:58.719298583 +0200 -@@ -514,7 +514,7 @@ +diff --git a/kernel/trace/trace_sched_wakeup.c b/kernel/trace/trace_sched_wakeup.c +index d6e1003724e9..79a2a5f7fc82 100644 +--- a/kernel/trace/trace_sched_wakeup.c ++++ b/kernel/trace/trace_sched_wakeup.c +@@ -514,7 +514,7 @@ static void wakeup_reset(struct trace_array *tr) } static void @@ -24995,10 +26241,11 @@ diff -Nur linux-4.1.26.orig/kernel/trace/trace_sched_wakeup.c linux-4.1.26/kerne { struct trace_array_cpu *data; int cpu = smp_processor_id(); -diff -Nur linux-4.1.26.orig/kernel/user.c linux-4.1.26/kernel/user.c ---- linux-4.1.26.orig/kernel/user.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/user.c 2016-06-19 15:30:58.719298583 +0200 -@@ -161,11 +161,11 @@ +diff --git a/kernel/user.c b/kernel/user.c +index b069ccbfb0b0..1a2e88e98b5e 100644 +--- a/kernel/user.c ++++ b/kernel/user.c +@@ -161,11 +161,11 @@ void free_uid(struct user_struct *up) if (!up) return; @@ -25012,10 +26259,11 @@ diff -Nur linux-4.1.26.orig/kernel/user.c linux-4.1.26/kernel/user.c } struct user_struct *alloc_uid(kuid_t uid) -diff -Nur linux-4.1.26.orig/kernel/watchdog.c linux-4.1.26/kernel/watchdog.c ---- linux-4.1.26.orig/kernel/watchdog.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/watchdog.c 2016-06-19 15:30:58.719298583 +0200 -@@ -262,6 +262,8 @@ +diff --git a/kernel/watchdog.c b/kernel/watchdog.c +index f89ea713213f..37dd3a5bf53f 100644 +--- a/kernel/watchdog.c ++++ b/kernel/watchdog.c +@@ -262,6 +262,8 @@ static int is_softlockup(unsigned long touch_ts) #ifdef CONFIG_HARDLOCKUP_DETECTOR @@ -25024,7 +26272,7 @@ diff -Nur linux-4.1.26.orig/kernel/watchdog.c linux-4.1.26/kernel/watchdog.c static struct perf_event_attr wd_hw_attr = { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES, -@@ -295,13 +297,21 @@ +@@ -295,13 +297,21 @@ static void watchdog_overflow_callback(struct perf_event *event, /* only print hardlockups once */ if (__this_cpu_read(hard_watchdog_warn) == true) return; @@ -25048,7 +26296,7 @@ diff -Nur linux-4.1.26.orig/kernel/watchdog.c linux-4.1.26/kernel/watchdog.c __this_cpu_write(hard_watchdog_warn, true); return; -@@ -444,6 +454,7 @@ +@@ -444,6 +454,7 @@ static void watchdog_enable(unsigned int cpu) /* kick off the timer for the hardlockup detector */ hrtimer_init(hrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); hrtimer->function = watchdog_timer_fn; @@ -25056,9 +26304,10 @@ diff -Nur linux-4.1.26.orig/kernel/watchdog.c linux-4.1.26/kernel/watchdog.c /* Enable the perf event */ watchdog_nmi_enable(cpu); -diff -Nur linux-4.1.26.orig/kernel/workqueue.c linux-4.1.26/kernel/workqueue.c ---- linux-4.1.26.orig/kernel/workqueue.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/workqueue.c 2016-06-19 15:30:58.719298583 +0200 +diff --git a/kernel/workqueue.c b/kernel/workqueue.c +index d0efe9295a0e..80f3bb082136 100644 +--- a/kernel/workqueue.c ++++ b/kernel/workqueue.c @@ -48,6 +48,8 @@ #include <linux/nodemask.h> #include <linux/moduleparam.h> @@ -25068,7 +26317,7 @@ diff -Nur linux-4.1.26.orig/kernel/workqueue.c linux-4.1.26/kernel/workqueue.c #include "workqueue_internal.h" -@@ -121,11 +123,16 @@ +@@ -121,11 +123,16 @@ enum { * cpu or grabbing pool->lock is enough for read access. If * POOL_DISASSOCIATED is set, it's identical to L. * @@ -25086,7 +26335,7 @@ diff -Nur linux-4.1.26.orig/kernel/workqueue.c linux-4.1.26/kernel/workqueue.c * * PW: wq_pool_mutex and wq->mutex protected for writes. Either for reads. * -@@ -134,7 +141,7 @@ +@@ -134,7 +141,7 @@ enum { * * WQ: wq->mutex protected. * @@ -25095,7 +26344,7 @@ diff -Nur linux-4.1.26.orig/kernel/workqueue.c linux-4.1.26/kernel/workqueue.c * * MD: wq_mayday_lock protected. */ -@@ -183,7 +190,7 @@ +@@ -183,7 +190,7 @@ struct worker_pool { atomic_t nr_running ____cacheline_aligned_in_smp; /* @@ -25104,7 +26353,7 @@ diff -Nur linux-4.1.26.orig/kernel/workqueue.c linux-4.1.26/kernel/workqueue.c * from get_work_pool(). */ struct rcu_head rcu; -@@ -212,7 +219,7 @@ +@@ -212,7 +219,7 @@ struct pool_workqueue { /* * Release of unbound pwq is punted to system_wq. See put_pwq() * and pwq_unbound_release_workfn() for details. pool_workqueue @@ -25113,7 +26362,7 @@ diff -Nur linux-4.1.26.orig/kernel/workqueue.c linux-4.1.26/kernel/workqueue.c * determined without grabbing wq->mutex. */ struct work_struct unbound_release_work; -@@ -334,6 +341,8 @@ +@@ -334,6 +341,8 @@ EXPORT_SYMBOL_GPL(system_power_efficient_wq); struct workqueue_struct *system_freezable_power_efficient_wq __read_mostly; EXPORT_SYMBOL_GPL(system_freezable_power_efficient_wq); @@ -25122,7 +26371,7 @@ diff -Nur linux-4.1.26.orig/kernel/workqueue.c linux-4.1.26/kernel/workqueue.c static int worker_thread(void *__worker); static void copy_workqueue_attrs(struct workqueue_attrs *to, const struct workqueue_attrs *from); -@@ -343,14 +352,14 @@ +@@ -343,14 +352,14 @@ static void workqueue_sysfs_unregister(struct workqueue_struct *wq); #include <trace/events/workqueue.h> #define assert_rcu_or_pool_mutex() \ @@ -25141,7 +26390,7 @@ diff -Nur linux-4.1.26.orig/kernel/workqueue.c linux-4.1.26/kernel/workqueue.c #define assert_rcu_or_wq_mutex_or_pool_mutex(wq) \ rcu_lockdep_assert(rcu_read_lock_sched_held() || \ -@@ -368,7 +377,7 @@ +@@ -368,7 +377,7 @@ static void workqueue_sysfs_unregister(struct workqueue_struct *wq); * @pool: iteration cursor * @pi: integer used for iteration * @@ -25150,7 +26399,7 @@ diff -Nur linux-4.1.26.orig/kernel/workqueue.c linux-4.1.26/kernel/workqueue.c * locked. If the pool needs to be used beyond the locking in effect, the * caller is responsible for guaranteeing that the pool stays online. * -@@ -400,7 +409,7 @@ +@@ -400,7 +409,7 @@ static void workqueue_sysfs_unregister(struct workqueue_struct *wq); * @pwq: iteration cursor * @wq: the target workqueue * @@ -25159,7 +26408,7 @@ diff -Nur linux-4.1.26.orig/kernel/workqueue.c linux-4.1.26/kernel/workqueue.c * If the pwq needs to be used beyond the locking in effect, the caller is * responsible for guaranteeing that the pwq stays online. * -@@ -412,6 +421,31 @@ +@@ -412,6 +421,31 @@ static void workqueue_sysfs_unregister(struct workqueue_struct *wq); if (({ assert_rcu_or_wq_mutex(wq); false; })) { } \ else @@ -25191,7 +26440,7 @@ diff -Nur linux-4.1.26.orig/kernel/workqueue.c linux-4.1.26/kernel/workqueue.c #ifdef CONFIG_DEBUG_OBJECTS_WORK static struct debug_obj_descr work_debug_descr; -@@ -562,8 +596,7 @@ +@@ -562,8 +596,7 @@ static int worker_pool_assign_id(struct worker_pool *pool) * @wq: the target workqueue * @node: the node ID * @@ -25201,7 +26450,7 @@ diff -Nur linux-4.1.26.orig/kernel/workqueue.c linux-4.1.26/kernel/workqueue.c * If the pwq needs to be used beyond the locking in effect, the caller is * responsible for guaranteeing that the pwq stays online. * -@@ -706,8 +739,8 @@ +@@ -706,8 +739,8 @@ static struct pool_workqueue *get_work_pwq(struct work_struct *work) * @work: the work item of interest * * Pools are created and destroyed under wq_pool_mutex, and allows read @@ -25212,7 +26461,7 @@ diff -Nur linux-4.1.26.orig/kernel/workqueue.c linux-4.1.26/kernel/workqueue.c * * All fields of the returned pool are accessible as long as the above * mentioned locking is in effect. If the returned pool needs to be used -@@ -844,51 +877,44 @@ +@@ -844,51 +877,44 @@ static struct worker *first_idle_worker(struct worker_pool *pool) */ static void wake_up_worker(struct worker_pool *pool) { @@ -25283,7 +26532,7 @@ diff -Nur linux-4.1.26.orig/kernel/workqueue.c linux-4.1.26/kernel/workqueue.c struct worker_pool *pool; /* -@@ -897,29 +923,26 @@ +@@ -897,29 +923,26 @@ struct task_struct *wq_worker_sleeping(struct task_struct *task, int cpu) * checking NOT_RUNNING. */ if (worker->flags & WORKER_NOT_RUNNING) @@ -25323,7 +26572,7 @@ diff -Nur linux-4.1.26.orig/kernel/workqueue.c linux-4.1.26/kernel/workqueue.c } /** -@@ -1113,12 +1136,12 @@ +@@ -1113,12 +1136,12 @@ static void put_pwq_unlocked(struct pool_workqueue *pwq) { if (pwq) { /* @@ -25339,7 +26588,7 @@ diff -Nur linux-4.1.26.orig/kernel/workqueue.c linux-4.1.26/kernel/workqueue.c } } -@@ -1220,7 +1243,7 @@ +@@ -1220,7 +1243,7 @@ static int try_to_grab_pending(struct work_struct *work, bool is_dwork, struct worker_pool *pool; struct pool_workqueue *pwq; @@ -25348,7 +26597,7 @@ diff -Nur linux-4.1.26.orig/kernel/workqueue.c linux-4.1.26/kernel/workqueue.c /* try to steal the timer if it exists */ if (is_dwork) { -@@ -1239,6 +1262,7 @@ +@@ -1239,6 +1262,7 @@ static int try_to_grab_pending(struct work_struct *work, bool is_dwork, if (!test_and_set_bit(WORK_STRUCT_PENDING_BIT, work_data_bits(work))) return 0; @@ -25356,7 +26605,7 @@ diff -Nur linux-4.1.26.orig/kernel/workqueue.c linux-4.1.26/kernel/workqueue.c /* * The queueing is in progress, or it is already queued. Try to * steal it from ->worklist without clearing WORK_STRUCT_PENDING. -@@ -1277,14 +1301,16 @@ +@@ -1277,14 +1301,16 @@ static int try_to_grab_pending(struct work_struct *work, bool is_dwork, set_work_pool_and_keep_pending(work, pool->id); spin_unlock(&pool->lock); @@ -25375,7 +26624,7 @@ diff -Nur linux-4.1.26.orig/kernel/workqueue.c linux-4.1.26/kernel/workqueue.c return -EAGAIN; } -@@ -1353,7 +1379,7 @@ +@@ -1353,7 +1379,7 @@ static void __queue_work(int cpu, struct workqueue_struct *wq, * queued or lose PENDING. Grabbing PENDING and queueing should * happen with IRQ disabled. */ @@ -25384,7 +26633,7 @@ diff -Nur linux-4.1.26.orig/kernel/workqueue.c linux-4.1.26/kernel/workqueue.c debug_work_activate(work); -@@ -1361,6 +1387,8 @@ +@@ -1361,6 +1387,8 @@ static void __queue_work(int cpu, struct workqueue_struct *wq, if (unlikely(wq->flags & __WQ_DRAINING) && WARN_ON_ONCE(!is_chained_work(wq))) return; @@ -25393,7 +26642,7 @@ diff -Nur linux-4.1.26.orig/kernel/workqueue.c linux-4.1.26/kernel/workqueue.c retry: if (req_cpu == WORK_CPU_UNBOUND) cpu = raw_smp_processor_id(); -@@ -1417,10 +1445,8 @@ +@@ -1417,10 +1445,8 @@ retry: /* pwq determined, queue */ trace_workqueue_queue_work(req_cpu, pwq, work); @@ -25406,7 +26655,7 @@ diff -Nur linux-4.1.26.orig/kernel/workqueue.c linux-4.1.26/kernel/workqueue.c pwq->nr_in_flight[pwq->work_color]++; work_flags = work_color_to_flags(pwq->work_color); -@@ -1436,7 +1462,9 @@ +@@ -1436,7 +1462,9 @@ retry: insert_work(pwq, work, worklist, work_flags); @@ -25416,7 +26665,7 @@ diff -Nur linux-4.1.26.orig/kernel/workqueue.c linux-4.1.26/kernel/workqueue.c } /** -@@ -1456,14 +1484,14 @@ +@@ -1456,14 +1484,14 @@ bool queue_work_on(int cpu, struct workqueue_struct *wq, bool ret = false; unsigned long flags; @@ -25433,7 +26682,7 @@ diff -Nur linux-4.1.26.orig/kernel/workqueue.c linux-4.1.26/kernel/workqueue.c return ret; } EXPORT_SYMBOL(queue_work_on); -@@ -1530,14 +1558,14 @@ +@@ -1530,14 +1558,14 @@ bool queue_delayed_work_on(int cpu, struct workqueue_struct *wq, unsigned long flags; /* read the comment in __queue_work() */ @@ -25450,7 +26699,7 @@ diff -Nur linux-4.1.26.orig/kernel/workqueue.c linux-4.1.26/kernel/workqueue.c return ret; } EXPORT_SYMBOL(queue_delayed_work_on); -@@ -1572,7 +1600,7 @@ +@@ -1572,7 +1600,7 @@ bool mod_delayed_work_on(int cpu, struct workqueue_struct *wq, if (likely(ret >= 0)) { __queue_delayed_work(cpu, wq, dwork, delay); @@ -25459,7 +26708,7 @@ diff -Nur linux-4.1.26.orig/kernel/workqueue.c linux-4.1.26/kernel/workqueue.c } /* -ENOENT from try_to_grab_pending() becomes %true */ -@@ -1605,7 +1633,9 @@ +@@ -1605,7 +1633,9 @@ static void worker_enter_idle(struct worker *worker) worker->last_active = jiffies; /* idle_list is LIFO */ @@ -25469,7 +26718,7 @@ diff -Nur linux-4.1.26.orig/kernel/workqueue.c linux-4.1.26/kernel/workqueue.c if (too_many_workers(pool) && !timer_pending(&pool->idle_timer)) mod_timer(&pool->idle_timer, jiffies + IDLE_WORKER_TIMEOUT); -@@ -1638,7 +1668,9 @@ +@@ -1638,7 +1668,9 @@ static void worker_leave_idle(struct worker *worker) return; worker_clr_flags(worker, WORKER_IDLE); pool->nr_idle--; @@ -25479,7 +26728,7 @@ diff -Nur linux-4.1.26.orig/kernel/workqueue.c linux-4.1.26/kernel/workqueue.c } static struct worker *alloc_worker(int node) -@@ -1806,7 +1838,9 @@ +@@ -1806,7 +1838,9 @@ static void destroy_worker(struct worker *worker) pool->nr_workers--; pool->nr_idle--; @@ -25489,7 +26738,7 @@ diff -Nur linux-4.1.26.orig/kernel/workqueue.c linux-4.1.26/kernel/workqueue.c worker->flags |= WORKER_DIE; wake_up_process(worker->task); } -@@ -2723,14 +2757,14 @@ +@@ -2723,14 +2757,14 @@ static bool start_flush_work(struct work_struct *work, struct wq_barrier *barr) might_sleep(); @@ -25507,7 +26756,7 @@ diff -Nur linux-4.1.26.orig/kernel/workqueue.c linux-4.1.26/kernel/workqueue.c /* see the comment in try_to_grab_pending() with the same code */ pwq = get_work_pwq(work); if (pwq) { -@@ -2757,10 +2791,11 @@ +@@ -2757,10 +2791,11 @@ static bool start_flush_work(struct work_struct *work, struct wq_barrier *barr) else lock_map_acquire_read(&pwq->wq->lockdep_map); lock_map_release(&pwq->wq->lockdep_map); @@ -25520,7 +26769,7 @@ diff -Nur linux-4.1.26.orig/kernel/workqueue.c linux-4.1.26/kernel/workqueue.c return false; } -@@ -2847,7 +2882,7 @@ +@@ -2847,7 +2882,7 @@ static bool __cancel_work_timer(struct work_struct *work, bool is_dwork) /* tell other tasks trying to grab @work to back off */ mark_work_canceling(work); @@ -25529,7 +26778,7 @@ diff -Nur linux-4.1.26.orig/kernel/workqueue.c linux-4.1.26/kernel/workqueue.c flush_work(work); clear_work_data(work); -@@ -2902,10 +2937,10 @@ +@@ -2902,10 +2937,10 @@ EXPORT_SYMBOL_GPL(cancel_work_sync); */ bool flush_delayed_work(struct delayed_work *dwork) { @@ -25542,7 +26791,7 @@ diff -Nur linux-4.1.26.orig/kernel/workqueue.c linux-4.1.26/kernel/workqueue.c return flush_work(&dwork->work); } EXPORT_SYMBOL(flush_delayed_work); -@@ -2940,7 +2975,7 @@ +@@ -2940,7 +2975,7 @@ bool cancel_delayed_work(struct delayed_work *dwork) set_work_pool_and_clear_pending(&dwork->work, get_work_pool_id(&dwork->work)); @@ -25551,7 +26800,7 @@ diff -Nur linux-4.1.26.orig/kernel/workqueue.c linux-4.1.26/kernel/workqueue.c return ret; } EXPORT_SYMBOL(cancel_delayed_work); -@@ -3198,7 +3233,7 @@ +@@ -3198,7 +3233,7 @@ static void rcu_free_pool(struct rcu_head *rcu) * put_unbound_pool - put a worker_pool * @pool: worker_pool to put * @@ -25560,7 +26809,7 @@ diff -Nur linux-4.1.26.orig/kernel/workqueue.c linux-4.1.26/kernel/workqueue.c * safe manner. get_unbound_pool() calls this function on its failure path * and this function should be able to release pools which went through, * successfully or not, init_worker_pool(). -@@ -3252,8 +3287,8 @@ +@@ -3252,8 +3287,8 @@ static void put_unbound_pool(struct worker_pool *pool) del_timer_sync(&pool->idle_timer); del_timer_sync(&pool->mayday_timer); @@ -25571,7 +26820,7 @@ diff -Nur linux-4.1.26.orig/kernel/workqueue.c linux-4.1.26/kernel/workqueue.c } /** -@@ -3358,14 +3393,14 @@ +@@ -3358,14 +3393,14 @@ static void pwq_unbound_release_workfn(struct work_struct *work) put_unbound_pool(pool); mutex_unlock(&wq_pool_mutex); @@ -25588,7 +26837,7 @@ diff -Nur linux-4.1.26.orig/kernel/workqueue.c linux-4.1.26/kernel/workqueue.c } /** -@@ -4003,7 +4038,7 @@ +@@ -4003,7 +4038,7 @@ void destroy_workqueue(struct workqueue_struct *wq) * The base ref is never dropped on per-cpu pwqs. Directly * schedule RCU free. */ @@ -25597,7 +26846,7 @@ diff -Nur linux-4.1.26.orig/kernel/workqueue.c linux-4.1.26/kernel/workqueue.c } else { /* * We're the sole accessor of @wq at this point. Directly -@@ -4096,7 +4131,8 @@ +@@ -4096,7 +4131,8 @@ bool workqueue_congested(int cpu, struct workqueue_struct *wq) struct pool_workqueue *pwq; bool ret; @@ -25607,7 +26856,7 @@ diff -Nur linux-4.1.26.orig/kernel/workqueue.c linux-4.1.26/kernel/workqueue.c if (cpu == WORK_CPU_UNBOUND) cpu = smp_processor_id(); -@@ -4107,7 +4143,8 @@ +@@ -4107,7 +4143,8 @@ bool workqueue_congested(int cpu, struct workqueue_struct *wq) pwq = unbound_pwq_by_node(wq, cpu_to_node(cpu)); ret = !list_empty(&pwq->delayed_works); @@ -25617,7 +26866,7 @@ diff -Nur linux-4.1.26.orig/kernel/workqueue.c linux-4.1.26/kernel/workqueue.c return ret; } -@@ -4133,15 +4170,15 @@ +@@ -4133,15 +4170,15 @@ unsigned int work_busy(struct work_struct *work) if (work_pending(work)) ret |= WORK_BUSY_PENDING; @@ -25637,7 +26886,7 @@ diff -Nur linux-4.1.26.orig/kernel/workqueue.c linux-4.1.26/kernel/workqueue.c return ret; } -@@ -4330,7 +4367,7 @@ +@@ -4330,7 +4367,7 @@ void show_workqueue_state(void) unsigned long flags; int pi; @@ -25646,7 +26895,7 @@ diff -Nur linux-4.1.26.orig/kernel/workqueue.c linux-4.1.26/kernel/workqueue.c pr_info("Showing busy workqueues and worker pools:\n"); -@@ -4381,7 +4418,7 @@ +@@ -4381,7 +4418,7 @@ void show_workqueue_state(void) spin_unlock_irqrestore(&pool->lock, flags); } @@ -25655,7 +26904,7 @@ diff -Nur linux-4.1.26.orig/kernel/workqueue.c linux-4.1.26/kernel/workqueue.c } /* -@@ -4742,16 +4779,16 @@ +@@ -4742,16 +4779,16 @@ bool freeze_workqueues_busy(void) * nr_active is monotonically decreasing. It's safe * to peek without lock. */ @@ -25675,7 +26924,7 @@ diff -Nur linux-4.1.26.orig/kernel/workqueue.c linux-4.1.26/kernel/workqueue.c } out_unlock: mutex_unlock(&wq_pool_mutex); -@@ -4865,7 +4902,8 @@ +@@ -4865,7 +4902,8 @@ static ssize_t wq_pool_ids_show(struct device *dev, const char *delim = ""; int node, written = 0; @@ -25685,7 +26934,7 @@ diff -Nur linux-4.1.26.orig/kernel/workqueue.c linux-4.1.26/kernel/workqueue.c for_each_node(node) { written += scnprintf(buf + written, PAGE_SIZE - written, "%s%d:%d", delim, node, -@@ -4873,7 +4911,8 @@ +@@ -4873,7 +4911,8 @@ static ssize_t wq_pool_ids_show(struct device *dev, delim = " "; } written += scnprintf(buf + written, PAGE_SIZE - written, "\n"); @@ -25695,10 +26944,11 @@ diff -Nur linux-4.1.26.orig/kernel/workqueue.c linux-4.1.26/kernel/workqueue.c return written; } -diff -Nur linux-4.1.26.orig/kernel/workqueue_internal.h linux-4.1.26/kernel/workqueue_internal.h ---- linux-4.1.26.orig/kernel/workqueue_internal.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/kernel/workqueue_internal.h 2016-06-19 15:30:58.719298583 +0200 -@@ -43,6 +43,7 @@ +diff --git a/kernel/workqueue_internal.h b/kernel/workqueue_internal.h +index 45215870ac6c..f000c4d6917e 100644 +--- a/kernel/workqueue_internal.h ++++ b/kernel/workqueue_internal.h +@@ -43,6 +43,7 @@ struct worker { unsigned long last_active; /* L: last active timestamp */ unsigned int flags; /* X: flags */ int id; /* I: worker id */ @@ -25706,7 +26956,7 @@ diff -Nur linux-4.1.26.orig/kernel/workqueue_internal.h linux-4.1.26/kernel/work /* * Opaque string set with work_set_desc(). Printed out with task -@@ -68,7 +69,7 @@ +@@ -68,7 +69,7 @@ static inline struct worker *current_wq_worker(void) * Scheduler hooks for concurrency managed workqueue. Only to be used from * sched/core.c and workqueue.c. */ @@ -25716,10 +26966,23 @@ diff -Nur linux-4.1.26.orig/kernel/workqueue_internal.h linux-4.1.26/kernel/work +void wq_worker_sleeping(struct task_struct *task); #endif /* _KERNEL_WORKQUEUE_INTERNAL_H */ -diff -Nur linux-4.1.26.orig/lib/debugobjects.c linux-4.1.26/lib/debugobjects.c ---- linux-4.1.26.orig/lib/debugobjects.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/lib/debugobjects.c 2016-06-19 15:30:58.719298583 +0200 -@@ -309,7 +309,10 @@ +diff --git a/lib/Kconfig b/lib/Kconfig +index 601965a948e8..8689649d5038 100644 +--- a/lib/Kconfig ++++ b/lib/Kconfig +@@ -391,6 +391,7 @@ config CHECK_SIGNATURE + + config CPUMASK_OFFSTACK + bool "Force CPU masks off stack" if DEBUG_PER_CPU_MAPS ++ depends on !PREEMPT_RT_FULL + help + Use dynamic allocation for cpumask_var_t, instead of putting + them on the stack. This is a bit more expensive, but avoids +diff --git a/lib/debugobjects.c b/lib/debugobjects.c +index 547f7f923dbc..8fcdbc2fc6d0 100644 +--- a/lib/debugobjects.c ++++ b/lib/debugobjects.c +@@ -309,7 +309,10 @@ __debug_object_init(void *addr, struct debug_obj_descr *descr, int onstack) struct debug_obj *obj; unsigned long flags; @@ -25731,9 +26994,10 @@ diff -Nur linux-4.1.26.orig/lib/debugobjects.c linux-4.1.26/lib/debugobjects.c db = get_bucket((unsigned long) addr); -diff -Nur linux-4.1.26.orig/lib/dump_stack.c linux-4.1.26/lib/dump_stack.c ---- linux-4.1.26.orig/lib/dump_stack.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/lib/dump_stack.c 2016-06-19 15:30:58.719298583 +0200 +diff --git a/lib/dump_stack.c b/lib/dump_stack.c +index c30d07e99dba..6f2484330b50 100644 +--- a/lib/dump_stack.c ++++ b/lib/dump_stack.c @@ -8,6 +8,7 @@ #include <linux/sched.h> #include <linux/smp.h> @@ -25742,9 +27006,10 @@ diff -Nur linux-4.1.26.orig/lib/dump_stack.c linux-4.1.26/lib/dump_stack.c static void __dump_stack(void) { -diff -Nur linux-4.1.26.orig/lib/idr.c linux-4.1.26/lib/idr.c ---- linux-4.1.26.orig/lib/idr.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/lib/idr.c 2016-06-19 15:30:58.723298738 +0200 +diff --git a/lib/idr.c b/lib/idr.c +index 5335c43adf46..d0681a357e69 100644 +--- a/lib/idr.c ++++ b/lib/idr.c @@ -30,6 +30,7 @@ #include <linux/idr.h> #include <linux/spinlock.h> @@ -25753,7 +27018,7 @@ diff -Nur linux-4.1.26.orig/lib/idr.c linux-4.1.26/lib/idr.c #define MAX_IDR_SHIFT (sizeof(int) * 8 - 1) #define MAX_IDR_BIT (1U << MAX_IDR_SHIFT) -@@ -366,6 +367,35 @@ +@@ -366,6 +367,35 @@ static void idr_fill_slot(struct idr *idr, void *ptr, int id, idr_mark_full(pa, id); } @@ -25789,7 +27054,7 @@ diff -Nur linux-4.1.26.orig/lib/idr.c linux-4.1.26/lib/idr.c /** * idr_preload - preload for idr_alloc() -@@ -401,7 +431,7 @@ +@@ -401,7 +431,7 @@ void idr_preload(gfp_t gfp_mask) WARN_ON_ONCE(in_interrupt()); might_sleep_if(gfp_mask & __GFP_WAIT); @@ -25798,7 +27063,7 @@ diff -Nur linux-4.1.26.orig/lib/idr.c linux-4.1.26/lib/idr.c /* * idr_alloc() is likely to succeed w/o full idr_layer buffer and -@@ -413,9 +443,9 @@ +@@ -413,9 +443,9 @@ void idr_preload(gfp_t gfp_mask) while (__this_cpu_read(idr_preload_cnt) < MAX_IDR_FREE) { struct idr_layer *new; @@ -25810,21 +27075,11 @@ diff -Nur linux-4.1.26.orig/lib/idr.c linux-4.1.26/lib/idr.c if (!new) break; -diff -Nur linux-4.1.26.orig/lib/Kconfig linux-4.1.26/lib/Kconfig ---- linux-4.1.26.orig/lib/Kconfig 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/lib/Kconfig 2016-06-19 15:30:58.719298583 +0200 -@@ -391,6 +391,7 @@ - - config CPUMASK_OFFSTACK - bool "Force CPU masks off stack" if DEBUG_PER_CPU_MAPS -+ depends on !PREEMPT_RT_FULL - help - Use dynamic allocation for cpumask_var_t, instead of putting - them on the stack. This is a bit more expensive, but avoids -diff -Nur linux-4.1.26.orig/lib/locking-selftest.c linux-4.1.26/lib/locking-selftest.c ---- linux-4.1.26.orig/lib/locking-selftest.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/lib/locking-selftest.c 2016-06-19 15:30:58.723298738 +0200 -@@ -590,6 +590,8 @@ +diff --git a/lib/locking-selftest.c b/lib/locking-selftest.c +index 872a15a2a637..b93a6103fa4d 100644 +--- a/lib/locking-selftest.c ++++ b/lib/locking-selftest.c +@@ -590,6 +590,8 @@ GENERATE_TESTCASE(init_held_rsem) #include "locking-selftest-spin-hardirq.h" GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_hard_spin) @@ -25833,7 +27088,7 @@ diff -Nur linux-4.1.26.orig/lib/locking-selftest.c linux-4.1.26/lib/locking-self #include "locking-selftest-rlock-hardirq.h" GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_hard_rlock) -@@ -605,9 +607,12 @@ +@@ -605,9 +607,12 @@ GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_soft_rlock) #include "locking-selftest-wlock-softirq.h" GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_soft_wlock) @@ -25846,7 +27101,7 @@ diff -Nur linux-4.1.26.orig/lib/locking-selftest.c linux-4.1.26/lib/locking-self /* * Enabling hardirqs with a softirq-safe lock held: */ -@@ -640,6 +645,8 @@ +@@ -640,6 +645,8 @@ GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2A_rlock) #undef E1 #undef E2 @@ -25855,7 +27110,7 @@ diff -Nur linux-4.1.26.orig/lib/locking-selftest.c linux-4.1.26/lib/locking-self /* * Enabling irqs with an irq-safe lock held: */ -@@ -663,6 +670,8 @@ +@@ -663,6 +670,8 @@ GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2A_rlock) #include "locking-selftest-spin-hardirq.h" GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_hard_spin) @@ -25864,7 +27119,7 @@ diff -Nur linux-4.1.26.orig/lib/locking-selftest.c linux-4.1.26/lib/locking-self #include "locking-selftest-rlock-hardirq.h" GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_hard_rlock) -@@ -678,6 +687,8 @@ +@@ -678,6 +687,8 @@ GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_soft_rlock) #include "locking-selftest-wlock-softirq.h" GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_soft_wlock) @@ -25873,7 +27128,7 @@ diff -Nur linux-4.1.26.orig/lib/locking-selftest.c linux-4.1.26/lib/locking-self #undef E1 #undef E2 -@@ -709,6 +720,8 @@ +@@ -709,6 +720,8 @@ GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_soft_wlock) #include "locking-selftest-spin-hardirq.h" GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_hard_spin) @@ -25882,7 +27137,7 @@ diff -Nur linux-4.1.26.orig/lib/locking-selftest.c linux-4.1.26/lib/locking-self #include "locking-selftest-rlock-hardirq.h" GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_hard_rlock) -@@ -724,6 +737,8 @@ +@@ -724,6 +737,8 @@ GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_soft_rlock) #include "locking-selftest-wlock-softirq.h" GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_soft_wlock) @@ -25891,7 +27146,7 @@ diff -Nur linux-4.1.26.orig/lib/locking-selftest.c linux-4.1.26/lib/locking-self #undef E1 #undef E2 #undef E3 -@@ -757,6 +772,8 @@ +@@ -757,6 +772,8 @@ GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_soft_wlock) #include "locking-selftest-spin-hardirq.h" GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_hard_spin) @@ -25900,7 +27155,7 @@ diff -Nur linux-4.1.26.orig/lib/locking-selftest.c linux-4.1.26/lib/locking-self #include "locking-selftest-rlock-hardirq.h" GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_hard_rlock) -@@ -772,10 +789,14 @@ +@@ -772,10 +789,14 @@ GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_soft_rlock) #include "locking-selftest-wlock-softirq.h" GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_soft_wlock) @@ -25915,7 +27170,7 @@ diff -Nur linux-4.1.26.orig/lib/locking-selftest.c linux-4.1.26/lib/locking-self /* * read-lock / write-lock irq inversion. * -@@ -838,6 +859,10 @@ +@@ -838,6 +859,10 @@ GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_soft_wlock) #undef E2 #undef E3 @@ -25926,7 +27181,7 @@ diff -Nur linux-4.1.26.orig/lib/locking-selftest.c linux-4.1.26/lib/locking-self /* * read-lock / write-lock recursion that is actually safe. */ -@@ -876,6 +901,8 @@ +@@ -876,6 +901,8 @@ GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion_soft) #undef E2 #undef E3 @@ -25935,7 +27190,7 @@ diff -Nur linux-4.1.26.orig/lib/locking-selftest.c linux-4.1.26/lib/locking-self /* * read-lock / write-lock recursion that is unsafe. */ -@@ -1858,6 +1885,7 @@ +@@ -1858,6 +1885,7 @@ void locking_selftest(void) printk(" --------------------------------------------------------------------------\n"); @@ -25943,7 +27198,7 @@ diff -Nur linux-4.1.26.orig/lib/locking-selftest.c linux-4.1.26/lib/locking-self /* * irq-context testcases: */ -@@ -1870,6 +1898,28 @@ +@@ -1870,6 +1898,28 @@ void locking_selftest(void) DO_TESTCASE_6x2("irq read-recursion", irq_read_recursion); // DO_TESTCASE_6x2B("irq read-recursion #2", irq_read_recursion2); @@ -25972,9 +27227,10 @@ diff -Nur linux-4.1.26.orig/lib/locking-selftest.c linux-4.1.26/lib/locking-self ww_tests(); -diff -Nur linux-4.1.26.orig/lib/percpu_ida.c linux-4.1.26/lib/percpu_ida.c ---- linux-4.1.26.orig/lib/percpu_ida.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/lib/percpu_ida.c 2016-06-19 15:30:58.723298738 +0200 +diff --git a/lib/percpu_ida.c b/lib/percpu_ida.c +index f75715131f20..b1529f40865d 100644 +--- a/lib/percpu_ida.c ++++ b/lib/percpu_ida.c @@ -26,6 +26,9 @@ #include <linux/string.h> #include <linux/spinlock.h> @@ -25985,7 +27241,7 @@ diff -Nur linux-4.1.26.orig/lib/percpu_ida.c linux-4.1.26/lib/percpu_ida.c struct percpu_ida_cpu { /* -@@ -148,13 +151,13 @@ +@@ -148,13 +151,13 @@ int percpu_ida_alloc(struct percpu_ida *pool, int state) unsigned long flags; int tag; @@ -26001,7 +27257,7 @@ diff -Nur linux-4.1.26.orig/lib/percpu_ida.c linux-4.1.26/lib/percpu_ida.c return tag; } -@@ -173,6 +176,7 @@ +@@ -173,6 +176,7 @@ int percpu_ida_alloc(struct percpu_ida *pool, int state) if (!tags->nr_free) alloc_global_tags(pool, tags); @@ -26009,7 +27265,7 @@ diff -Nur linux-4.1.26.orig/lib/percpu_ida.c linux-4.1.26/lib/percpu_ida.c if (!tags->nr_free) steal_tags(pool, tags); -@@ -184,7 +188,7 @@ +@@ -184,7 +188,7 @@ int percpu_ida_alloc(struct percpu_ida *pool, int state) } spin_unlock(&pool->lock); @@ -26018,7 +27274,7 @@ diff -Nur linux-4.1.26.orig/lib/percpu_ida.c linux-4.1.26/lib/percpu_ida.c if (tag >= 0 || state == TASK_RUNNING) break; -@@ -196,7 +200,7 @@ +@@ -196,7 +200,7 @@ int percpu_ida_alloc(struct percpu_ida *pool, int state) schedule(); @@ -26027,7 +27283,7 @@ diff -Nur linux-4.1.26.orig/lib/percpu_ida.c linux-4.1.26/lib/percpu_ida.c tags = this_cpu_ptr(pool->tag_cpu); } if (state != TASK_RUNNING) -@@ -221,7 +225,7 @@ +@@ -221,7 +225,7 @@ void percpu_ida_free(struct percpu_ida *pool, unsigned tag) BUG_ON(tag >= pool->nr_tags); @@ -26036,7 +27292,7 @@ diff -Nur linux-4.1.26.orig/lib/percpu_ida.c linux-4.1.26/lib/percpu_ida.c tags = this_cpu_ptr(pool->tag_cpu); spin_lock(&tags->lock); -@@ -253,7 +257,7 @@ +@@ -253,7 +257,7 @@ void percpu_ida_free(struct percpu_ida *pool, unsigned tag) spin_unlock(&pool->lock); } @@ -26045,7 +27301,7 @@ diff -Nur linux-4.1.26.orig/lib/percpu_ida.c linux-4.1.26/lib/percpu_ida.c } EXPORT_SYMBOL_GPL(percpu_ida_free); -@@ -345,7 +349,7 @@ +@@ -345,7 +349,7 @@ int percpu_ida_for_each_free(struct percpu_ida *pool, percpu_ida_cb fn, struct percpu_ida_cpu *remote; unsigned cpu, i, err = 0; @@ -26054,7 +27310,7 @@ diff -Nur linux-4.1.26.orig/lib/percpu_ida.c linux-4.1.26/lib/percpu_ida.c for_each_possible_cpu(cpu) { remote = per_cpu_ptr(pool->tag_cpu, cpu); spin_lock(&remote->lock); -@@ -367,7 +371,7 @@ +@@ -367,7 +371,7 @@ int percpu_ida_for_each_free(struct percpu_ida *pool, percpu_ida_cb fn, } spin_unlock(&pool->lock); out: @@ -26063,10 +27319,11 @@ diff -Nur linux-4.1.26.orig/lib/percpu_ida.c linux-4.1.26/lib/percpu_ida.c return err; } EXPORT_SYMBOL_GPL(percpu_ida_for_each_free); -diff -Nur linux-4.1.26.orig/lib/radix-tree.c linux-4.1.26/lib/radix-tree.c ---- linux-4.1.26.orig/lib/radix-tree.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/lib/radix-tree.c 2016-06-19 15:30:58.723298738 +0200 -@@ -195,12 +195,13 @@ +diff --git a/lib/radix-tree.c b/lib/radix-tree.c +index 8399002aa0f0..19713243e698 100644 +--- a/lib/radix-tree.c ++++ b/lib/radix-tree.c +@@ -195,12 +195,13 @@ radix_tree_node_alloc(struct radix_tree_root *root) * succeed in getting a node here (and never reach * kmem_cache_alloc) */ @@ -26081,7 +27338,7 @@ diff -Nur linux-4.1.26.orig/lib/radix-tree.c linux-4.1.26/lib/radix-tree.c /* * Update the allocation stack trace as this is more useful * for debugging. -@@ -240,6 +241,7 @@ +@@ -240,6 +241,7 @@ radix_tree_node_free(struct radix_tree_node *node) call_rcu(&node->rcu_head, radix_tree_node_rcu_free); } @@ -26089,7 +27346,7 @@ diff -Nur linux-4.1.26.orig/lib/radix-tree.c linux-4.1.26/lib/radix-tree.c /* * Load up this CPU's radix_tree_node buffer with sufficient objects to * ensure that the addition of a single element in the tree cannot fail. On -@@ -305,6 +307,7 @@ +@@ -305,6 +307,7 @@ int radix_tree_maybe_preload(gfp_t gfp_mask) return 0; } EXPORT_SYMBOL(radix_tree_maybe_preload); @@ -26097,10 +27354,11 @@ diff -Nur linux-4.1.26.orig/lib/radix-tree.c linux-4.1.26/lib/radix-tree.c /* * Return the maximum key which can be store into a -diff -Nur linux-4.1.26.orig/lib/scatterlist.c linux-4.1.26/lib/scatterlist.c ---- linux-4.1.26.orig/lib/scatterlist.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/lib/scatterlist.c 2016-06-19 15:30:58.723298738 +0200 -@@ -592,7 +592,7 @@ +diff --git a/lib/scatterlist.c b/lib/scatterlist.c +index c9f2e8c6ccc9..f6d1f8899dca 100644 +--- a/lib/scatterlist.c ++++ b/lib/scatterlist.c +@@ -592,7 +592,7 @@ void sg_miter_stop(struct sg_mapping_iter *miter) flush_kernel_dcache_page(miter->page); if (miter->__flags & SG_MITER_ATOMIC) { @@ -26109,7 +27367,7 @@ diff -Nur linux-4.1.26.orig/lib/scatterlist.c linux-4.1.26/lib/scatterlist.c kunmap_atomic(miter->addr); } else kunmap(miter->page); -@@ -637,7 +637,7 @@ +@@ -637,7 +637,7 @@ static size_t sg_copy_buffer(struct scatterlist *sgl, unsigned int nents, if (!sg_miter_skip(&miter, skip)) return false; @@ -26118,7 +27376,7 @@ diff -Nur linux-4.1.26.orig/lib/scatterlist.c linux-4.1.26/lib/scatterlist.c while (sg_miter_next(&miter) && offset < buflen) { unsigned int len; -@@ -654,7 +654,7 @@ +@@ -654,7 +654,7 @@ static size_t sg_copy_buffer(struct scatterlist *sgl, unsigned int nents, sg_miter_stop(&miter); @@ -26127,10 +27385,11 @@ diff -Nur linux-4.1.26.orig/lib/scatterlist.c linux-4.1.26/lib/scatterlist.c return offset; } -diff -Nur linux-4.1.26.orig/lib/smp_processor_id.c linux-4.1.26/lib/smp_processor_id.c ---- linux-4.1.26.orig/lib/smp_processor_id.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/lib/smp_processor_id.c 2016-06-19 15:30:58.723298738 +0200 -@@ -39,8 +39,9 @@ +diff --git a/lib/smp_processor_id.c b/lib/smp_processor_id.c +index 1afec32de6f2..11fa431046a8 100644 +--- a/lib/smp_processor_id.c ++++ b/lib/smp_processor_id.c +@@ -39,8 +39,9 @@ notrace static unsigned int check_preemption_disabled(const char *what1, if (!printk_ratelimit()) goto out_enable; @@ -26142,10 +27401,11 @@ diff -Nur linux-4.1.26.orig/lib/smp_processor_id.c linux-4.1.26/lib/smp_processo print_symbol("caller is %s\n", (long)__builtin_return_address(0)); dump_stack(); -diff -Nur linux-4.1.26.orig/lib/strnlen_user.c linux-4.1.26/lib/strnlen_user.c ---- linux-4.1.26.orig/lib/strnlen_user.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/lib/strnlen_user.c 2016-06-19 15:30:58.723298738 +0200 -@@ -85,7 +85,8 @@ +diff --git a/lib/strnlen_user.c b/lib/strnlen_user.c +index fe9a32591c24..3a5f2b366d84 100644 +--- a/lib/strnlen_user.c ++++ b/lib/strnlen_user.c +@@ -85,7 +85,8 @@ static inline long do_strnlen_user(const char __user *src, unsigned long count, * @str: The string to measure. * @count: Maximum count (including NUL character) * @@ -26155,7 +27415,7 @@ diff -Nur linux-4.1.26.orig/lib/strnlen_user.c linux-4.1.26/lib/strnlen_user.c * * Get the size of a NUL-terminated string in user space. * -@@ -121,7 +122,8 @@ +@@ -121,7 +122,8 @@ EXPORT_SYMBOL(strnlen_user); * strlen_user: - Get the size of a user string INCLUDING final NUL. * @str: The string to measure. * @@ -26165,10 +27425,24 @@ diff -Nur linux-4.1.26.orig/lib/strnlen_user.c linux-4.1.26/lib/strnlen_user.c * * Get the size of a NUL-terminated string in user space. * -diff -Nur linux-4.1.26.orig/mm/compaction.c linux-4.1.26/mm/compaction.c ---- linux-4.1.26.orig/mm/compaction.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/mm/compaction.c 2016-06-19 15:30:58.823302594 +0200 -@@ -1398,10 +1398,12 @@ +diff --git a/mm/Kconfig b/mm/Kconfig +index 390214da4546..0cc45370563a 100644 +--- a/mm/Kconfig ++++ b/mm/Kconfig +@@ -409,7 +409,7 @@ config NOMMU_INITIAL_TRIM_EXCESS + + config TRANSPARENT_HUGEPAGE + bool "Transparent Hugepage Support" +- depends on HAVE_ARCH_TRANSPARENT_HUGEPAGE ++ depends on HAVE_ARCH_TRANSPARENT_HUGEPAGE && !PREEMPT_RT_FULL + select COMPACTION + help + Transparent Hugepages allows the kernel to use huge pages and +diff --git a/mm/compaction.c b/mm/compaction.c +index f93ada7403bf..1504b589905e 100644 +--- a/mm/compaction.c ++++ b/mm/compaction.c +@@ -1423,10 +1423,12 @@ check_drain: cc->migrate_pfn & ~((1UL << cc->order) - 1); if (last_migrated_pfn < current_block_start) { @@ -26183,10 +27457,11 @@ diff -Nur linux-4.1.26.orig/mm/compaction.c linux-4.1.26/mm/compaction.c /* No more flushing until we migrate again */ last_migrated_pfn = 0; } -diff -Nur linux-4.1.26.orig/mm/filemap.c linux-4.1.26/mm/filemap.c ---- linux-4.1.26.orig/mm/filemap.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/mm/filemap.c 2016-06-19 15:30:58.823302594 +0200 -@@ -167,7 +167,9 @@ +diff --git a/mm/filemap.c b/mm/filemap.c +index 1ffef05f1c1f..7d4fa2bf6ac2 100644 +--- a/mm/filemap.c ++++ b/mm/filemap.c +@@ -167,7 +167,9 @@ static void page_cache_tree_delete(struct address_space *mapping, if (!workingset_node_pages(node) && list_empty(&node->private_list)) { node->private_data = mapping; @@ -26197,7 +27472,7 @@ diff -Nur linux-4.1.26.orig/mm/filemap.c linux-4.1.26/mm/filemap.c } } -@@ -533,9 +535,12 @@ +@@ -533,9 +535,12 @@ static int page_cache_tree_insert(struct address_space *mapping, * node->private_list is protected by * mapping->tree_lock. */ @@ -26212,9 +27487,10 @@ diff -Nur linux-4.1.26.orig/mm/filemap.c linux-4.1.26/mm/filemap.c } return 0; } -diff -Nur linux-4.1.26.orig/mm/highmem.c linux-4.1.26/mm/highmem.c ---- linux-4.1.26.orig/mm/highmem.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/mm/highmem.c 2016-06-19 15:30:58.823302594 +0200 +diff --git a/mm/highmem.c b/mm/highmem.c +index 123bcd3ed4f2..16e8cf26d38a 100644 +--- a/mm/highmem.c ++++ b/mm/highmem.c @@ -29,10 +29,11 @@ #include <linux/kgdb.h> #include <asm/tlbflush.h> @@ -26228,7 +27504,7 @@ diff -Nur linux-4.1.26.orig/mm/highmem.c linux-4.1.26/mm/highmem.c /* * Virtual_count is not a pure "count". -@@ -107,8 +108,9 @@ +@@ -107,8 +108,9 @@ static inline wait_queue_head_t *get_pkmap_wait_queue_head(unsigned int color) unsigned long totalhigh_pages __read_mostly; EXPORT_SYMBOL(totalhigh_pages); @@ -26239,21 +27515,10 @@ diff -Nur linux-4.1.26.orig/mm/highmem.c linux-4.1.26/mm/highmem.c unsigned int nr_free_highpages (void) { -diff -Nur linux-4.1.26.orig/mm/Kconfig linux-4.1.26/mm/Kconfig ---- linux-4.1.26.orig/mm/Kconfig 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/mm/Kconfig 2016-06-19 15:30:58.823302594 +0200 -@@ -409,7 +409,7 @@ - - config TRANSPARENT_HUGEPAGE - bool "Transparent Hugepage Support" -- depends on HAVE_ARCH_TRANSPARENT_HUGEPAGE -+ depends on HAVE_ARCH_TRANSPARENT_HUGEPAGE && !PREEMPT_RT_FULL - select COMPACTION - help - Transparent Hugepages allows the kernel to use huge pages and -diff -Nur linux-4.1.26.orig/mm/memcontrol.c linux-4.1.26/mm/memcontrol.c ---- linux-4.1.26.orig/mm/memcontrol.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/mm/memcontrol.c 2016-06-19 15:30:58.827302748 +0200 +diff --git a/mm/memcontrol.c b/mm/memcontrol.c +index 221762e24a68..cefa875a4320 100644 +--- a/mm/memcontrol.c ++++ b/mm/memcontrol.c @@ -66,6 +66,8 @@ #include <net/sock.h> #include <net/ip.h> @@ -26263,7 +27528,7 @@ diff -Nur linux-4.1.26.orig/mm/memcontrol.c linux-4.1.26/mm/memcontrol.c #include "slab.h" #include <asm/uaccess.h> -@@ -85,6 +87,7 @@ +@@ -85,6 +87,7 @@ int do_swap_account __read_mostly; #define do_swap_account 0 #endif @@ -26271,7 +27536,7 @@ diff -Nur linux-4.1.26.orig/mm/memcontrol.c linux-4.1.26/mm/memcontrol.c static const char * const mem_cgroup_stat_names[] = { "cache", "rss", -@@ -2124,14 +2127,17 @@ +@@ -2124,14 +2127,17 @@ static void drain_local_stock(struct work_struct *dummy) */ static void refill_stock(struct mem_cgroup *memcg, unsigned int nr_pages) { @@ -26291,7 +27556,7 @@ diff -Nur linux-4.1.26.orig/mm/memcontrol.c linux-4.1.26/mm/memcontrol.c } /* -@@ -2147,7 +2153,7 @@ +@@ -2147,7 +2153,7 @@ static void drain_all_stock(struct mem_cgroup *root_memcg) return; /* Notify other cpus that system-wide "drain" is running */ get_online_cpus(); @@ -26300,7 +27565,7 @@ diff -Nur linux-4.1.26.orig/mm/memcontrol.c linux-4.1.26/mm/memcontrol.c for_each_online_cpu(cpu) { struct memcg_stock_pcp *stock = &per_cpu(memcg_stock, cpu); struct mem_cgroup *memcg; -@@ -2164,7 +2170,7 @@ +@@ -2164,7 +2170,7 @@ static void drain_all_stock(struct mem_cgroup *root_memcg) schedule_work_on(cpu, &stock->work); } } @@ -26309,7 +27574,7 @@ diff -Nur linux-4.1.26.orig/mm/memcontrol.c linux-4.1.26/mm/memcontrol.c put_online_cpus(); mutex_unlock(&percpu_charge_mutex); } -@@ -4803,12 +4809,12 @@ +@@ -4803,12 +4809,12 @@ static int mem_cgroup_move_account(struct page *page, ret = 0; @@ -26324,7 +27589,7 @@ diff -Nur linux-4.1.26.orig/mm/memcontrol.c linux-4.1.26/mm/memcontrol.c out_unlock: unlock_page(page); out: -@@ -5551,10 +5557,10 @@ +@@ -5551,10 +5557,10 @@ void mem_cgroup_commit_charge(struct page *page, struct mem_cgroup *memcg, VM_BUG_ON_PAGE(!PageTransHuge(page), page); } @@ -26337,7 +27602,7 @@ diff -Nur linux-4.1.26.orig/mm/memcontrol.c linux-4.1.26/mm/memcontrol.c if (do_swap_account && PageSwapCache(page)) { swp_entry_t entry = { .val = page_private(page) }; -@@ -5610,14 +5616,14 @@ +@@ -5610,14 +5616,14 @@ static void uncharge_batch(struct mem_cgroup *memcg, unsigned long pgpgout, memcg_oom_recover(memcg); } @@ -26354,7 +27619,7 @@ diff -Nur linux-4.1.26.orig/mm/memcontrol.c linux-4.1.26/mm/memcontrol.c if (!mem_cgroup_is_root(memcg)) css_put_many(&memcg->css, nr_pages); -@@ -5821,6 +5827,7 @@ +@@ -5821,6 +5827,7 @@ void mem_cgroup_swapout(struct page *page, swp_entry_t entry) { struct mem_cgroup *memcg; unsigned short oldid; @@ -26362,7 +27627,7 @@ diff -Nur linux-4.1.26.orig/mm/memcontrol.c linux-4.1.26/mm/memcontrol.c VM_BUG_ON_PAGE(PageLRU(page), page); VM_BUG_ON_PAGE(page_count(page), page); -@@ -5843,9 +5850,11 @@ +@@ -5843,9 +5850,11 @@ void mem_cgroup_swapout(struct page *page, swp_entry_t entry) if (!mem_cgroup_is_root(memcg)) page_counter_uncharge(&memcg->memory, 1); @@ -26374,10 +27639,11 @@ diff -Nur linux-4.1.26.orig/mm/memcontrol.c linux-4.1.26/mm/memcontrol.c } /** -diff -Nur linux-4.1.26.orig/mm/memory.c linux-4.1.26/mm/memory.c ---- linux-4.1.26.orig/mm/memory.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/mm/memory.c 2016-06-19 15:30:58.827302748 +0200 -@@ -3753,7 +3753,7 @@ +diff --git a/mm/memory.c b/mm/memory.c +index 701d9ad45c46..3456e24cce4f 100644 +--- a/mm/memory.c ++++ b/mm/memory.c +@@ -3753,7 +3753,7 @@ void print_vma_addr(char *prefix, unsigned long ip) } #if defined(CONFIG_PROVE_LOCKING) || defined(CONFIG_DEBUG_ATOMIC_SLEEP) @@ -26386,7 +27652,7 @@ diff -Nur linux-4.1.26.orig/mm/memory.c linux-4.1.26/mm/memory.c { /* * Some code (nfs/sunrpc) uses socket ops on kernel memory while -@@ -3763,21 +3763,15 @@ +@@ -3763,21 +3763,15 @@ void might_fault(void) */ if (segment_eq(get_fs(), KERNEL_DS)) return; @@ -26413,10 +27679,11 @@ diff -Nur linux-4.1.26.orig/mm/memory.c linux-4.1.26/mm/memory.c #endif #if defined(CONFIG_TRANSPARENT_HUGEPAGE) || defined(CONFIG_HUGETLBFS) -diff -Nur linux-4.1.26.orig/mm/mmu_context.c linux-4.1.26/mm/mmu_context.c ---- linux-4.1.26.orig/mm/mmu_context.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/mm/mmu_context.c 2016-06-19 15:30:58.827302748 +0200 -@@ -23,6 +23,7 @@ +diff --git a/mm/mmu_context.c b/mm/mmu_context.c +index f802c2d216a7..b1b6f238e42d 100644 +--- a/mm/mmu_context.c ++++ b/mm/mmu_context.c +@@ -23,6 +23,7 @@ void use_mm(struct mm_struct *mm) struct task_struct *tsk = current; task_lock(tsk); @@ -26424,7 +27691,7 @@ diff -Nur linux-4.1.26.orig/mm/mmu_context.c linux-4.1.26/mm/mmu_context.c active_mm = tsk->active_mm; if (active_mm != mm) { atomic_inc(&mm->mm_count); -@@ -30,6 +31,7 @@ +@@ -30,6 +31,7 @@ void use_mm(struct mm_struct *mm) } tsk->mm = mm; switch_mm(active_mm, mm, tsk); @@ -26432,9 +27699,10 @@ diff -Nur linux-4.1.26.orig/mm/mmu_context.c linux-4.1.26/mm/mmu_context.c task_unlock(tsk); #ifdef finish_arch_post_lock_switch finish_arch_post_lock_switch(); -diff -Nur linux-4.1.26.orig/mm/page_alloc.c linux-4.1.26/mm/page_alloc.c ---- linux-4.1.26.orig/mm/page_alloc.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/mm/page_alloc.c 2016-06-19 15:30:58.827302748 +0200 +diff --git a/mm/page_alloc.c b/mm/page_alloc.c +index f6f6831cec52..c6f829a374c1 100644 +--- a/mm/page_alloc.c ++++ b/mm/page_alloc.c @@ -60,6 +60,7 @@ #include <linux/page_ext.h> #include <linux/hugetlb.h> @@ -26443,7 +27711,7 @@ diff -Nur linux-4.1.26.orig/mm/page_alloc.c linux-4.1.26/mm/page_alloc.c #include <linux/page_owner.h> #include <asm/sections.h> -@@ -233,6 +234,18 @@ +@@ -233,6 +234,18 @@ EXPORT_SYMBOL(nr_node_ids); EXPORT_SYMBOL(nr_online_nodes); #endif @@ -26462,7 +27730,7 @@ diff -Nur linux-4.1.26.orig/mm/page_alloc.c linux-4.1.26/mm/page_alloc.c int page_group_by_mobility_disabled __read_mostly; void set_pageblock_migratetype(struct page *page, int migratetype) -@@ -701,7 +714,7 @@ +@@ -701,7 +714,7 @@ static inline int free_pages_check(struct page *page) } /* @@ -26471,7 +27739,7 @@ diff -Nur linux-4.1.26.orig/mm/page_alloc.c linux-4.1.26/mm/page_alloc.c * Assumes all pages on list are in same zone, and of same order. * count is the number of pages to free. * -@@ -712,18 +725,51 @@ +@@ -712,18 +725,51 @@ static inline int free_pages_check(struct page *page) * pinned" detection logic. */ static void free_pcppages_bulk(struct zone *zone, int count, @@ -26527,7 +27795,7 @@ diff -Nur linux-4.1.26.orig/mm/page_alloc.c linux-4.1.26/mm/page_alloc.c while (to_free) { struct page *page; struct list_head *list; -@@ -739,7 +785,7 @@ +@@ -739,7 +785,7 @@ static void free_pcppages_bulk(struct zone *zone, int count, batch_free++; if (++migratetype == MIGRATE_PCPTYPES) migratetype = 0; @@ -26536,7 +27804,7 @@ diff -Nur linux-4.1.26.orig/mm/page_alloc.c linux-4.1.26/mm/page_alloc.c } while (list_empty(list)); /* This is the only non-empty list. Free them all. */ -@@ -747,21 +793,11 @@ +@@ -747,21 +793,11 @@ static void free_pcppages_bulk(struct zone *zone, int count, batch_free = to_free; do { @@ -26560,7 +27828,7 @@ diff -Nur linux-4.1.26.orig/mm/page_alloc.c linux-4.1.26/mm/page_alloc.c } static void free_one_page(struct zone *zone, -@@ -770,7 +806,9 @@ +@@ -770,7 +806,9 @@ static void free_one_page(struct zone *zone, int migratetype) { unsigned long nr_scanned; @@ -26571,7 +27839,7 @@ diff -Nur linux-4.1.26.orig/mm/page_alloc.c linux-4.1.26/mm/page_alloc.c nr_scanned = zone_page_state(zone, NR_PAGES_SCANNED); if (nr_scanned) __mod_zone_page_state(zone, NR_PAGES_SCANNED, -nr_scanned); -@@ -780,7 +818,7 @@ +@@ -780,7 +818,7 @@ static void free_one_page(struct zone *zone, migratetype = get_pfnblock_migratetype(page, pfn); } __free_one_page(page, pfn, zone, order, migratetype); @@ -26580,7 +27848,7 @@ diff -Nur linux-4.1.26.orig/mm/page_alloc.c linux-4.1.26/mm/page_alloc.c } static int free_tail_pages_check(struct page *head_page, struct page *page) -@@ -845,11 +883,11 @@ +@@ -845,11 +883,11 @@ static void __free_pages_ok(struct page *page, unsigned int order) return; migratetype = get_pfnblock_migratetype(page, pfn); @@ -26594,7 +27862,7 @@ diff -Nur linux-4.1.26.orig/mm/page_alloc.c linux-4.1.26/mm/page_alloc.c } void __init __free_pages_bootmem(struct page *page, unsigned long pfn, -@@ -1396,16 +1434,18 @@ +@@ -1396,16 +1434,18 @@ static int rmqueue_bulk(struct zone *zone, unsigned int order, void drain_zone_pages(struct zone *zone, struct per_cpu_pages *pcp) { unsigned long flags; @@ -26616,7 +27884,7 @@ diff -Nur linux-4.1.26.orig/mm/page_alloc.c linux-4.1.26/mm/page_alloc.c } #endif -@@ -1421,16 +1461,21 @@ +@@ -1421,16 +1461,21 @@ static void drain_pages_zone(unsigned int cpu, struct zone *zone) unsigned long flags; struct per_cpu_pageset *pset; struct per_cpu_pages *pcp; @@ -26642,7 +27910,7 @@ diff -Nur linux-4.1.26.orig/mm/page_alloc.c linux-4.1.26/mm/page_alloc.c } /* -@@ -1516,8 +1561,17 @@ +@@ -1516,8 +1561,17 @@ void drain_all_pages(struct zone *zone) else cpumask_clear_cpu(cpu, &cpus_with_pcps); } @@ -26660,7 +27928,7 @@ diff -Nur linux-4.1.26.orig/mm/page_alloc.c linux-4.1.26/mm/page_alloc.c } #ifdef CONFIG_HIBERNATION -@@ -1573,7 +1627,7 @@ +@@ -1573,7 +1627,7 @@ void free_hot_cold_page(struct page *page, bool cold) migratetype = get_pfnblock_migratetype(page, pfn); set_freepage_migratetype(page, migratetype); @@ -26669,7 +27937,7 @@ diff -Nur linux-4.1.26.orig/mm/page_alloc.c linux-4.1.26/mm/page_alloc.c __count_vm_event(PGFREE); /* -@@ -1599,12 +1653,17 @@ +@@ -1599,12 +1653,17 @@ void free_hot_cold_page(struct page *page, bool cold) pcp->count++; if (pcp->count >= pcp->high) { unsigned long batch = READ_ONCE(pcp->batch); @@ -26689,7 +27957,7 @@ diff -Nur linux-4.1.26.orig/mm/page_alloc.c linux-4.1.26/mm/page_alloc.c } /* -@@ -1735,7 +1794,7 @@ +@@ -1735,7 +1794,7 @@ struct page *buffered_rmqueue(struct zone *preferred_zone, struct per_cpu_pages *pcp; struct list_head *list; @@ -26698,7 +27966,7 @@ diff -Nur linux-4.1.26.orig/mm/page_alloc.c linux-4.1.26/mm/page_alloc.c pcp = &this_cpu_ptr(zone->pageset)->pcp; list = &pcp->lists[migratetype]; if (list_empty(list)) { -@@ -1767,13 +1826,15 @@ +@@ -1767,13 +1826,15 @@ struct page *buffered_rmqueue(struct zone *preferred_zone, */ WARN_ON_ONCE(order > 1); } @@ -26717,7 +27985,7 @@ diff -Nur linux-4.1.26.orig/mm/page_alloc.c linux-4.1.26/mm/page_alloc.c } __mod_zone_page_state(zone, NR_ALLOC_BATCH, -(1 << order)); -@@ -1783,13 +1844,13 @@ +@@ -1783,13 +1844,13 @@ struct page *buffered_rmqueue(struct zone *preferred_zone, __count_zone_vm_events(PGALLOC, zone, 1 << order); zone_statistics(preferred_zone, zone, gfp_flags); @@ -26733,7 +28001,7 @@ diff -Nur linux-4.1.26.orig/mm/page_alloc.c linux-4.1.26/mm/page_alloc.c return NULL; } -@@ -5680,6 +5741,7 @@ +@@ -5680,6 +5741,7 @@ static int page_alloc_cpu_notify(struct notifier_block *self, void __init page_alloc_init(void) { hotcpu_notifier(page_alloc_cpu_notify, 0); @@ -26741,7 +28009,7 @@ diff -Nur linux-4.1.26.orig/mm/page_alloc.c linux-4.1.26/mm/page_alloc.c } /* -@@ -6575,7 +6637,7 @@ +@@ -6575,7 +6637,7 @@ void zone_pcp_reset(struct zone *zone) struct per_cpu_pageset *pset; /* avoid races with drain_pages() */ @@ -26750,7 +28018,7 @@ diff -Nur linux-4.1.26.orig/mm/page_alloc.c linux-4.1.26/mm/page_alloc.c if (zone->pageset != &boot_pageset) { for_each_online_cpu(cpu) { pset = per_cpu_ptr(zone->pageset, cpu); -@@ -6584,7 +6646,7 @@ +@@ -6584,7 +6646,7 @@ void zone_pcp_reset(struct zone *zone) free_percpu(zone->pageset); zone->pageset = &boot_pageset; } @@ -26759,10 +28027,11 @@ diff -Nur linux-4.1.26.orig/mm/page_alloc.c linux-4.1.26/mm/page_alloc.c } #ifdef CONFIG_MEMORY_HOTREMOVE -diff -Nur linux-4.1.26.orig/mm/slab.h linux-4.1.26/mm/slab.h ---- linux-4.1.26.orig/mm/slab.h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/mm/slab.h 2016-06-19 15:30:58.827302748 +0200 -@@ -330,7 +330,11 @@ +diff --git a/mm/slab.h b/mm/slab.h +index 4c3ac12dd644..0c9bda0eb0c1 100644 +--- a/mm/slab.h ++++ b/mm/slab.h +@@ -330,7 +330,11 @@ static inline struct kmem_cache *cache_from_obj(struct kmem_cache *s, void *x) * The slab lists for all objects. */ struct kmem_cache_node { @@ -26774,10 +28043,11 @@ diff -Nur linux-4.1.26.orig/mm/slab.h linux-4.1.26/mm/slab.h #ifdef CONFIG_SLAB struct list_head slabs_partial; /* partial list first, better asm code */ -diff -Nur linux-4.1.26.orig/mm/slub.c linux-4.1.26/mm/slub.c ---- linux-4.1.26.orig/mm/slub.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/mm/slub.c 2016-06-19 15:30:58.827302748 +0200 -@@ -1069,7 +1069,7 @@ +diff --git a/mm/slub.c b/mm/slub.c +index 08342c523a85..905e283d7829 100644 +--- a/mm/slub.c ++++ b/mm/slub.c +@@ -1069,7 +1069,7 @@ static noinline struct kmem_cache_node *free_debug_processing( { struct kmem_cache_node *n = get_node(s, page_to_nid(page)); @@ -26786,7 +28056,7 @@ diff -Nur linux-4.1.26.orig/mm/slub.c linux-4.1.26/mm/slub.c slab_lock(page); if (!check_slab(s, page)) -@@ -1116,7 +1116,7 @@ +@@ -1116,7 +1116,7 @@ out: fail: slab_unlock(page); @@ -26795,7 +28065,7 @@ diff -Nur linux-4.1.26.orig/mm/slub.c linux-4.1.26/mm/slub.c slab_fix(s, "Object at 0x%p not freed", object); return NULL; } -@@ -1242,6 +1242,12 @@ +@@ -1242,6 +1242,12 @@ static inline void dec_slabs_node(struct kmem_cache *s, int node, #endif /* CONFIG_SLUB_DEBUG */ @@ -26808,7 +28078,7 @@ diff -Nur linux-4.1.26.orig/mm/slub.c linux-4.1.26/mm/slub.c /* * Hooks for other subsystems that check memory allocations. In a typical * production configuration these hooks all should produce no code at all. -@@ -1306,6 +1312,17 @@ +@@ -1306,6 +1312,17 @@ static inline void slab_free_hook(struct kmem_cache *s, void *x) kasan_slab_free(s, x); } @@ -26826,7 +28096,7 @@ diff -Nur linux-4.1.26.orig/mm/slub.c linux-4.1.26/mm/slub.c /* * Slab allocation and freeing */ -@@ -1336,10 +1353,17 @@ +@@ -1336,10 +1353,17 @@ static struct page *allocate_slab(struct kmem_cache *s, gfp_t flags, int node) struct page *page; struct kmem_cache_order_objects oo = s->oo; gfp_t alloc_gfp; @@ -26845,7 +28115,7 @@ diff -Nur linux-4.1.26.orig/mm/slub.c linux-4.1.26/mm/slub.c local_irq_enable(); flags |= s->allocflags; -@@ -1359,13 +1383,13 @@ +@@ -1359,13 +1383,13 @@ static struct page *allocate_slab(struct kmem_cache *s, gfp_t flags, int node) * Try a lower order alloc if possible */ page = alloc_slab_page(s, alloc_gfp, node, oo); @@ -26864,7 +28134,7 @@ diff -Nur linux-4.1.26.orig/mm/slub.c linux-4.1.26/mm/slub.c int pages = 1 << oo_order(oo); kmemcheck_alloc_shadow(page, oo_order(oo), alloc_gfp, node); -@@ -1380,51 +1404,9 @@ +@@ -1380,51 +1404,9 @@ static struct page *allocate_slab(struct kmem_cache *s, gfp_t flags, int node) kmemcheck_mark_unallocated_pages(page, pages); } @@ -26916,7 +28186,7 @@ diff -Nur linux-4.1.26.orig/mm/slub.c linux-4.1.26/mm/slub.c page->slab_cache = s; __SetPageSlab(page); if (page_is_pfmemalloc(page)) -@@ -1448,10 +1430,34 @@ +@@ -1448,10 +1430,34 @@ static struct page *new_slab(struct kmem_cache *s, gfp_t flags, int node) page->freelist = start; page->inuse = page->objects; page->frozen = 1; @@ -26951,7 +28221,7 @@ diff -Nur linux-4.1.26.orig/mm/slub.c linux-4.1.26/mm/slub.c static void __free_slab(struct kmem_cache *s, struct page *page) { int order = compound_order(page); -@@ -1483,6 +1489,16 @@ +@@ -1483,6 +1489,16 @@ static void __free_slab(struct kmem_cache *s, struct page *page) memcg_uncharge_slab(s, order); } @@ -26968,7 +28238,7 @@ diff -Nur linux-4.1.26.orig/mm/slub.c linux-4.1.26/mm/slub.c #define need_reserve_slab_rcu \ (sizeof(((struct page *)NULL)->lru) < sizeof(struct rcu_head)) -@@ -1517,6 +1533,12 @@ +@@ -1517,6 +1533,12 @@ static void free_slab(struct kmem_cache *s, struct page *page) } call_rcu(head, rcu_free_slab); @@ -26981,7 +28251,7 @@ diff -Nur linux-4.1.26.orig/mm/slub.c linux-4.1.26/mm/slub.c } else __free_slab(s, page); } -@@ -1630,7 +1652,7 @@ +@@ -1630,7 +1652,7 @@ static void *get_partial_node(struct kmem_cache *s, struct kmem_cache_node *n, if (!n || !n->nr_partial) return NULL; @@ -26990,7 +28260,7 @@ diff -Nur linux-4.1.26.orig/mm/slub.c linux-4.1.26/mm/slub.c list_for_each_entry_safe(page, page2, &n->partial, lru) { void *t; -@@ -1655,7 +1677,7 @@ +@@ -1655,7 +1677,7 @@ static void *get_partial_node(struct kmem_cache *s, struct kmem_cache_node *n, break; } @@ -26999,7 +28269,7 @@ diff -Nur linux-4.1.26.orig/mm/slub.c linux-4.1.26/mm/slub.c return object; } -@@ -1901,7 +1923,7 @@ +@@ -1901,7 +1923,7 @@ redo: * that acquire_slab() will see a slab page that * is frozen */ @@ -27008,7 +28278,7 @@ diff -Nur linux-4.1.26.orig/mm/slub.c linux-4.1.26/mm/slub.c } } else { m = M_FULL; -@@ -1912,7 +1934,7 @@ +@@ -1912,7 +1934,7 @@ redo: * slabs from diagnostic functions will not see * any frozen slabs. */ @@ -27017,7 +28287,7 @@ diff -Nur linux-4.1.26.orig/mm/slub.c linux-4.1.26/mm/slub.c } } -@@ -1947,7 +1969,7 @@ +@@ -1947,7 +1969,7 @@ redo: goto redo; if (lock) @@ -27026,7 +28296,7 @@ diff -Nur linux-4.1.26.orig/mm/slub.c linux-4.1.26/mm/slub.c if (m == M_FREE) { stat(s, DEACTIVATE_EMPTY); -@@ -1979,10 +2001,10 @@ +@@ -1979,10 +2001,10 @@ static void unfreeze_partials(struct kmem_cache *s, n2 = get_node(s, page_to_nid(page)); if (n != n2) { if (n) @@ -27039,7 +28309,7 @@ diff -Nur linux-4.1.26.orig/mm/slub.c linux-4.1.26/mm/slub.c } do { -@@ -2011,7 +2033,7 @@ +@@ -2011,7 +2033,7 @@ static void unfreeze_partials(struct kmem_cache *s, } if (n) @@ -27048,7 +28318,7 @@ diff -Nur linux-4.1.26.orig/mm/slub.c linux-4.1.26/mm/slub.c while (discard_page) { page = discard_page; -@@ -2050,14 +2072,21 @@ +@@ -2050,14 +2072,21 @@ static void put_cpu_partial(struct kmem_cache *s, struct page *page, int drain) pobjects = oldpage->pobjects; pages = oldpage->pages; if (drain && pobjects > s->cpu_partial) { @@ -27070,7 +28340,7 @@ diff -Nur linux-4.1.26.orig/mm/slub.c linux-4.1.26/mm/slub.c oldpage = NULL; pobjects = 0; pages = 0; -@@ -2129,7 +2158,22 @@ +@@ -2129,7 +2158,22 @@ static bool has_cpu_slab(int cpu, void *info) static void flush_all(struct kmem_cache *s) { @@ -27093,7 +28363,7 @@ diff -Nur linux-4.1.26.orig/mm/slub.c linux-4.1.26/mm/slub.c } /* -@@ -2165,10 +2209,10 @@ +@@ -2165,10 +2209,10 @@ static unsigned long count_partial(struct kmem_cache_node *n, unsigned long x = 0; struct page *page; @@ -27106,7 +28376,7 @@ diff -Nur linux-4.1.26.orig/mm/slub.c linux-4.1.26/mm/slub.c return x; } #endif /* CONFIG_SLUB_DEBUG || CONFIG_SYSFS */ -@@ -2305,9 +2349,11 @@ +@@ -2305,9 +2349,11 @@ static inline void *get_freelist(struct kmem_cache *s, struct page *page) static void *__slab_alloc(struct kmem_cache *s, gfp_t gfpflags, int node, unsigned long addr, struct kmem_cache_cpu *c) { @@ -27118,7 +28388,7 @@ diff -Nur linux-4.1.26.orig/mm/slub.c linux-4.1.26/mm/slub.c local_irq_save(flags); #ifdef CONFIG_PREEMPT -@@ -2375,7 +2421,13 @@ +@@ -2375,7 +2421,13 @@ load_freelist: VM_BUG_ON(!c->page->frozen); c->freelist = get_freepointer(s, freelist); c->tid = next_tid(c->tid); @@ -27132,7 +28402,7 @@ diff -Nur linux-4.1.26.orig/mm/slub.c linux-4.1.26/mm/slub.c return freelist; new_slab: -@@ -2392,8 +2444,7 @@ +@@ -2392,8 +2444,7 @@ new_slab: if (unlikely(!freelist)) { slab_out_of_memory(s, gfpflags, node); @@ -27142,7 +28412,7 @@ diff -Nur linux-4.1.26.orig/mm/slub.c linux-4.1.26/mm/slub.c } page = c->page; -@@ -2408,8 +2459,7 @@ +@@ -2408,8 +2459,7 @@ new_slab: deactivate_slab(s, page, get_freepointer(s, freelist)); c->page = NULL; c->freelist = NULL; @@ -27152,7 +28422,7 @@ diff -Nur linux-4.1.26.orig/mm/slub.c linux-4.1.26/mm/slub.c } /* -@@ -2593,7 +2643,7 @@ +@@ -2593,7 +2643,7 @@ static void __slab_free(struct kmem_cache *s, struct page *page, do { if (unlikely(n)) { @@ -27161,7 +28431,7 @@ diff -Nur linux-4.1.26.orig/mm/slub.c linux-4.1.26/mm/slub.c n = NULL; } prior = page->freelist; -@@ -2625,7 +2675,7 @@ +@@ -2625,7 +2675,7 @@ static void __slab_free(struct kmem_cache *s, struct page *page, * Otherwise the list_lock will synchronize with * other processors updating the list of slabs. */ @@ -27170,7 +28440,7 @@ diff -Nur linux-4.1.26.orig/mm/slub.c linux-4.1.26/mm/slub.c } } -@@ -2667,7 +2717,7 @@ +@@ -2667,7 +2717,7 @@ static void __slab_free(struct kmem_cache *s, struct page *page, add_partial(n, page, DEACTIVATE_TO_TAIL); stat(s, FREE_ADD_PARTIAL); } @@ -27179,7 +28449,7 @@ diff -Nur linux-4.1.26.orig/mm/slub.c linux-4.1.26/mm/slub.c return; slab_empty: -@@ -2682,7 +2732,7 @@ +@@ -2682,7 +2732,7 @@ slab_empty: remove_full(s, n, page); } @@ -27188,7 +28458,7 @@ diff -Nur linux-4.1.26.orig/mm/slub.c linux-4.1.26/mm/slub.c stat(s, FREE_SLAB); discard_slab(s, page); } -@@ -2881,7 +2931,7 @@ +@@ -2881,7 +2931,7 @@ static void init_kmem_cache_node(struct kmem_cache_node *n) { n->nr_partial = 0; @@ -27197,7 +28467,7 @@ diff -Nur linux-4.1.26.orig/mm/slub.c linux-4.1.26/mm/slub.c INIT_LIST_HEAD(&n->partial); #ifdef CONFIG_SLUB_DEBUG atomic_long_set(&n->nr_slabs, 0); -@@ -3463,7 +3513,7 @@ +@@ -3463,7 +3513,7 @@ int __kmem_cache_shrink(struct kmem_cache *s, bool deactivate) for (i = 0; i < SHRINK_PROMOTE_MAX; i++) INIT_LIST_HEAD(promote + i); @@ -27206,7 +28476,7 @@ diff -Nur linux-4.1.26.orig/mm/slub.c linux-4.1.26/mm/slub.c /* * Build lists of slabs to discard or promote. -@@ -3494,7 +3544,7 @@ +@@ -3494,7 +3544,7 @@ int __kmem_cache_shrink(struct kmem_cache *s, bool deactivate) for (i = SHRINK_PROMOTE_MAX - 1; i >= 0; i--) list_splice(promote + i, &n->partial); @@ -27215,7 +28485,7 @@ diff -Nur linux-4.1.26.orig/mm/slub.c linux-4.1.26/mm/slub.c /* Release empty slabs */ list_for_each_entry_safe(page, t, &discard, lru) -@@ -3670,6 +3720,12 @@ +@@ -3670,6 +3720,12 @@ void __init kmem_cache_init(void) { static __initdata struct kmem_cache boot_kmem_cache, boot_kmem_cache_node; @@ -27228,7 +28498,7 @@ diff -Nur linux-4.1.26.orig/mm/slub.c linux-4.1.26/mm/slub.c if (debug_guardpage_minorder()) slub_max_order = 0; -@@ -3912,7 +3968,7 @@ +@@ -3912,7 +3968,7 @@ static int validate_slab_node(struct kmem_cache *s, struct page *page; unsigned long flags; @@ -27237,7 +28507,7 @@ diff -Nur linux-4.1.26.orig/mm/slub.c linux-4.1.26/mm/slub.c list_for_each_entry(page, &n->partial, lru) { validate_slab_slab(s, page, map); -@@ -3934,7 +3990,7 @@ +@@ -3934,7 +3990,7 @@ static int validate_slab_node(struct kmem_cache *s, s->name, count, atomic_long_read(&n->nr_slabs)); out: @@ -27246,7 +28516,7 @@ diff -Nur linux-4.1.26.orig/mm/slub.c linux-4.1.26/mm/slub.c return count; } -@@ -4122,12 +4178,12 @@ +@@ -4122,12 +4178,12 @@ static int list_locations(struct kmem_cache *s, char *buf, if (!atomic_long_read(&n->nr_slabs)) continue; @@ -27261,9 +28531,10 @@ diff -Nur linux-4.1.26.orig/mm/slub.c linux-4.1.26/mm/slub.c } for (i = 0; i < t.count; i++) { -diff -Nur linux-4.1.26.orig/mm/swap.c linux-4.1.26/mm/swap.c ---- linux-4.1.26.orig/mm/swap.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/mm/swap.c 2016-06-19 15:30:58.831302903 +0200 +diff --git a/mm/swap.c b/mm/swap.c +index ab3b9c2dd783..b433019229f8 100644 +--- a/mm/swap.c ++++ b/mm/swap.c @@ -32,6 +32,7 @@ #include <linux/gfp.h> #include <linux/uio.h> @@ -27272,7 +28543,7 @@ diff -Nur linux-4.1.26.orig/mm/swap.c linux-4.1.26/mm/swap.c #include "internal.h" -@@ -45,6 +46,9 @@ +@@ -45,6 +46,9 @@ static DEFINE_PER_CPU(struct pagevec, lru_add_pvec); static DEFINE_PER_CPU(struct pagevec, lru_rotate_pvecs); static DEFINE_PER_CPU(struct pagevec, lru_deactivate_file_pvecs); @@ -27282,21 +28553,21 @@ diff -Nur linux-4.1.26.orig/mm/swap.c linux-4.1.26/mm/swap.c /* * This path almost never happens for VM activity - pages are normally * freed via pagevecs. But it gets used by networking. -@@ -481,11 +485,11 @@ +@@ -481,11 +485,11 @@ void rotate_reclaimable_page(struct page *page) unsigned long flags; page_cache_get(page); - local_irq_save(flags); + local_lock_irqsave(rotate_lock, flags); pvec = this_cpu_ptr(&lru_rotate_pvecs); - if (!pagevec_add(pvec, page)) + if (!pagevec_add(pvec, page) || PageCompound(page)) pagevec_move_tail(pvec); - local_irq_restore(flags); + local_unlock_irqrestore(rotate_lock, flags); } } -@@ -536,12 +540,13 @@ +@@ -536,12 +540,13 @@ static bool need_activate_page_drain(int cpu) void activate_page(struct page *page) { if (PageLRU(page) && !PageActive(page) && !PageUnevictable(page)) { @@ -27305,14 +28576,14 @@ diff -Nur linux-4.1.26.orig/mm/swap.c linux-4.1.26/mm/swap.c + activate_page_pvecs); page_cache_get(page); - if (!pagevec_add(pvec, page)) + if (!pagevec_add(pvec, page) || PageCompound(page)) pagevec_lru_move_fn(pvec, __activate_page, NULL); - put_cpu_var(activate_page_pvecs); + put_locked_var(swapvec_lock, activate_page_pvecs); } } -@@ -567,7 +572,7 @@ +@@ -567,7 +572,7 @@ void activate_page(struct page *page) static void __lru_cache_activate_page(struct page *page) { @@ -27321,7 +28592,7 @@ diff -Nur linux-4.1.26.orig/mm/swap.c linux-4.1.26/mm/swap.c int i; /* -@@ -589,7 +594,7 @@ +@@ -589,7 +594,7 @@ static void __lru_cache_activate_page(struct page *page) } } @@ -27330,7 +28601,7 @@ diff -Nur linux-4.1.26.orig/mm/swap.c linux-4.1.26/mm/swap.c } /* -@@ -628,13 +633,13 @@ +@@ -628,12 +633,12 @@ EXPORT_SYMBOL(mark_page_accessed); static void __lru_cache_add(struct page *page) { @@ -27338,27 +28609,32 @@ diff -Nur linux-4.1.26.orig/mm/swap.c linux-4.1.26/mm/swap.c + struct pagevec *pvec = &get_locked_var(swapvec_lock, lru_add_pvec); page_cache_get(page); - if (!pagevec_space(pvec)) + if (!pagevec_add(pvec, page) || PageCompound(page)) __pagevec_lru_add(pvec); - pagevec_add(pvec, page); - put_cpu_var(lru_add_pvec); + put_locked_var(swapvec_lock, lru_add_pvec); } /** -@@ -814,9 +819,9 @@ +@@ -813,9 +818,15 @@ void lru_add_drain_cpu(int cpu) unsigned long flags; /* No harm done if a racing interrupt already did this */ - local_irq_save(flags); ++#ifdef CONFIG_PREEMPT_RT_BASE ++ local_lock_irqsave_on(rotate_lock, flags, cpu); ++ pagevec_move_tail(pvec); ++ local_unlock_irqrestore_on(rotate_lock, flags, cpu); ++#else + local_lock_irqsave(rotate_lock, flags); pagevec_move_tail(pvec); - local_irq_restore(flags); + local_unlock_irqrestore(rotate_lock, flags); ++#endif } pvec = &per_cpu(lru_deactivate_file_pvecs, cpu); -@@ -844,18 +849,19 @@ +@@ -843,26 +854,47 @@ void deactivate_file_page(struct page *page) return; if (likely(get_page_unless_zero(page))) { @@ -27366,7 +28642,7 @@ diff -Nur linux-4.1.26.orig/mm/swap.c linux-4.1.26/mm/swap.c + struct pagevec *pvec = &get_locked_var(swapvec_lock, + lru_deactivate_file_pvecs); - if (!pagevec_add(pvec, page)) + if (!pagevec_add(pvec, page) || PageCompound(page)) pagevec_lru_move_fn(pvec, lru_deactivate_file_fn, NULL); - put_cpu_var(lru_deactivate_file_pvecs); + put_locked_var(swapvec_lock, lru_deactivate_file_pvecs); @@ -27381,11 +28657,65 @@ diff -Nur linux-4.1.26.orig/mm/swap.c linux-4.1.26/mm/swap.c + local_unlock_cpu(swapvec_lock); } ++ ++#ifdef CONFIG_PREEMPT_RT_BASE ++static inline void remote_lru_add_drain(int cpu, struct cpumask *has_work) ++{ ++ local_lock_on(swapvec_lock, cpu); ++ lru_add_drain_cpu(cpu); ++ local_unlock_on(swapvec_lock, cpu); ++} ++ ++#else ++ static void lru_add_drain_per_cpu(struct work_struct *dummy) -diff -Nur linux-4.1.26.orig/mm/truncate.c linux-4.1.26/mm/truncate.c ---- linux-4.1.26.orig/mm/truncate.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/mm/truncate.c 2016-06-19 15:30:58.831302903 +0200 -@@ -56,8 +56,11 @@ + { + lru_add_drain(); + } + + static DEFINE_PER_CPU(struct work_struct, lru_add_drain_work); ++static inline void remote_lru_add_drain(int cpu, struct cpumask *has_work) ++{ ++ struct work_struct *work = &per_cpu(lru_add_drain_work, cpu); ++ ++ INIT_WORK(work, lru_add_drain_per_cpu); ++ schedule_work_on(cpu, work); ++ cpumask_set_cpu(cpu, has_work); ++} ++#endif + + void lru_add_drain_all(void) + { +@@ -875,20 +907,17 @@ void lru_add_drain_all(void) + cpumask_clear(&has_work); + + for_each_online_cpu(cpu) { +- struct work_struct *work = &per_cpu(lru_add_drain_work, cpu); +- + if (pagevec_count(&per_cpu(lru_add_pvec, cpu)) || + pagevec_count(&per_cpu(lru_rotate_pvecs, cpu)) || + pagevec_count(&per_cpu(lru_deactivate_file_pvecs, cpu)) || +- need_activate_page_drain(cpu)) { +- INIT_WORK(work, lru_add_drain_per_cpu); +- schedule_work_on(cpu, work); +- cpumask_set_cpu(cpu, &has_work); +- } ++ need_activate_page_drain(cpu)) ++ remote_lru_add_drain(cpu, &has_work); + } + ++#ifndef CONFIG_PREEMPT_RT_BASE + for_each_cpu(cpu, &has_work) + flush_work(&per_cpu(lru_add_drain_work, cpu)); ++#endif + + put_online_cpus(); + mutex_unlock(&lock); +diff --git a/mm/truncate.c b/mm/truncate.c +index 66af9031fae8..09598db42681 100644 +--- a/mm/truncate.c ++++ b/mm/truncate.c +@@ -56,8 +56,11 @@ static void clear_exceptional_entry(struct address_space *mapping, * protected by mapping->tree_lock. */ if (!workingset_node_shadows(node) && @@ -27399,10 +28729,11 @@ diff -Nur linux-4.1.26.orig/mm/truncate.c linux-4.1.26/mm/truncate.c __radix_tree_delete_node(&mapping->page_tree, node); unlock: spin_unlock_irq(&mapping->tree_lock); -diff -Nur linux-4.1.26.orig/mm/vmalloc.c linux-4.1.26/mm/vmalloc.c ---- linux-4.1.26.orig/mm/vmalloc.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/mm/vmalloc.c 2016-06-19 15:30:58.831302903 +0200 -@@ -819,7 +819,7 @@ +diff --git a/mm/vmalloc.c b/mm/vmalloc.c +index 2faaa2976447..f87a29f1e718 100644 +--- a/mm/vmalloc.c ++++ b/mm/vmalloc.c +@@ -819,7 +819,7 @@ static void *new_vmap_block(unsigned int order, gfp_t gfp_mask) struct vmap_block *vb; struct vmap_area *va; unsigned long vb_idx; @@ -27411,7 +28742,7 @@ diff -Nur linux-4.1.26.orig/mm/vmalloc.c linux-4.1.26/mm/vmalloc.c void *vaddr; node = numa_node_id(); -@@ -862,11 +862,12 @@ +@@ -862,11 +862,12 @@ static void *new_vmap_block(unsigned int order, gfp_t gfp_mask) BUG_ON(err); radix_tree_preload_end(); @@ -27426,7 +28757,7 @@ diff -Nur linux-4.1.26.orig/mm/vmalloc.c linux-4.1.26/mm/vmalloc.c return vaddr; } -@@ -935,6 +936,7 @@ +@@ -935,6 +936,7 @@ static void *vb_alloc(unsigned long size, gfp_t gfp_mask) struct vmap_block *vb; void *vaddr = NULL; unsigned int order; @@ -27434,7 +28765,7 @@ diff -Nur linux-4.1.26.orig/mm/vmalloc.c linux-4.1.26/mm/vmalloc.c BUG_ON(size & ~PAGE_MASK); BUG_ON(size > PAGE_SIZE*VMAP_MAX_ALLOC); -@@ -949,7 +951,8 @@ +@@ -949,7 +951,8 @@ static void *vb_alloc(unsigned long size, gfp_t gfp_mask) order = get_order(size); rcu_read_lock(); @@ -27444,7 +28775,7 @@ diff -Nur linux-4.1.26.orig/mm/vmalloc.c linux-4.1.26/mm/vmalloc.c list_for_each_entry_rcu(vb, &vbq->free, free_list) { unsigned long pages_off; -@@ -972,7 +975,7 @@ +@@ -972,7 +975,7 @@ static void *vb_alloc(unsigned long size, gfp_t gfp_mask) break; } @@ -27453,10 +28784,11 @@ diff -Nur linux-4.1.26.orig/mm/vmalloc.c linux-4.1.26/mm/vmalloc.c rcu_read_unlock(); /* Allocate new block if nothing was found */ -diff -Nur linux-4.1.26.orig/mm/vmstat.c linux-4.1.26/mm/vmstat.c ---- linux-4.1.26.orig/mm/vmstat.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/mm/vmstat.c 2016-06-19 15:30:58.831302903 +0200 -@@ -226,6 +226,7 @@ +diff --git a/mm/vmstat.c b/mm/vmstat.c +index 4f5cd974e11a..86f0e2e3f677 100644 +--- a/mm/vmstat.c ++++ b/mm/vmstat.c +@@ -226,6 +226,7 @@ void __mod_zone_page_state(struct zone *zone, enum zone_stat_item item, long x; long t; @@ -27464,7 +28796,7 @@ diff -Nur linux-4.1.26.orig/mm/vmstat.c linux-4.1.26/mm/vmstat.c x = delta + __this_cpu_read(*p); t = __this_cpu_read(pcp->stat_threshold); -@@ -235,6 +236,7 @@ +@@ -235,6 +236,7 @@ void __mod_zone_page_state(struct zone *zone, enum zone_stat_item item, x = 0; } __this_cpu_write(*p, x); @@ -27472,7 +28804,7 @@ diff -Nur linux-4.1.26.orig/mm/vmstat.c linux-4.1.26/mm/vmstat.c } EXPORT_SYMBOL(__mod_zone_page_state); -@@ -267,6 +269,7 @@ +@@ -267,6 +269,7 @@ void __inc_zone_state(struct zone *zone, enum zone_stat_item item) s8 __percpu *p = pcp->vm_stat_diff + item; s8 v, t; @@ -27480,7 +28812,7 @@ diff -Nur linux-4.1.26.orig/mm/vmstat.c linux-4.1.26/mm/vmstat.c v = __this_cpu_inc_return(*p); t = __this_cpu_read(pcp->stat_threshold); if (unlikely(v > t)) { -@@ -275,6 +278,7 @@ +@@ -275,6 +278,7 @@ void __inc_zone_state(struct zone *zone, enum zone_stat_item item) zone_page_state_add(v + overstep, zone, item); __this_cpu_write(*p, -overstep); } @@ -27488,7 +28820,7 @@ diff -Nur linux-4.1.26.orig/mm/vmstat.c linux-4.1.26/mm/vmstat.c } void __inc_zone_page_state(struct page *page, enum zone_stat_item item) -@@ -289,6 +293,7 @@ +@@ -289,6 +293,7 @@ void __dec_zone_state(struct zone *zone, enum zone_stat_item item) s8 __percpu *p = pcp->vm_stat_diff + item; s8 v, t; @@ -27496,7 +28828,7 @@ diff -Nur linux-4.1.26.orig/mm/vmstat.c linux-4.1.26/mm/vmstat.c v = __this_cpu_dec_return(*p); t = __this_cpu_read(pcp->stat_threshold); if (unlikely(v < - t)) { -@@ -297,6 +302,7 @@ +@@ -297,6 +302,7 @@ void __dec_zone_state(struct zone *zone, enum zone_stat_item item) zone_page_state_add(v - overstep, zone, item); __this_cpu_write(*p, overstep); } @@ -27504,10 +28836,11 @@ diff -Nur linux-4.1.26.orig/mm/vmstat.c linux-4.1.26/mm/vmstat.c } void __dec_zone_page_state(struct page *page, enum zone_stat_item item) -diff -Nur linux-4.1.26.orig/mm/workingset.c linux-4.1.26/mm/workingset.c ---- linux-4.1.26.orig/mm/workingset.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/mm/workingset.c 2016-06-19 15:30:58.835303057 +0200 -@@ -264,7 +264,8 @@ +diff --git a/mm/workingset.c b/mm/workingset.c +index aa017133744b..263d0194734a 100644 +--- a/mm/workingset.c ++++ b/mm/workingset.c +@@ -264,7 +264,8 @@ void workingset_activation(struct page *page) * point where they would still be useful. */ @@ -27517,7 +28850,7 @@ diff -Nur linux-4.1.26.orig/mm/workingset.c linux-4.1.26/mm/workingset.c static unsigned long count_shadow_nodes(struct shrinker *shrinker, struct shrink_control *sc) -@@ -274,9 +275,9 @@ +@@ -274,9 +275,9 @@ static unsigned long count_shadow_nodes(struct shrinker *shrinker, unsigned long pages; /* list_lru lock nests inside IRQ-safe mapping->tree_lock */ @@ -27530,7 +28863,7 @@ diff -Nur linux-4.1.26.orig/mm/workingset.c linux-4.1.26/mm/workingset.c pages = node_present_pages(sc->nid); /* -@@ -363,9 +364,9 @@ +@@ -363,9 +364,9 @@ static enum lru_status shadow_lru_isolate(struct list_head *item, spin_unlock(&mapping->tree_lock); ret = LRU_REMOVED_RETRY; out: @@ -27542,7 +28875,7 @@ diff -Nur linux-4.1.26.orig/mm/workingset.c linux-4.1.26/mm/workingset.c spin_lock(lru_lock); return ret; } -@@ -376,10 +377,10 @@ +@@ -376,10 +377,10 @@ static unsigned long scan_shadow_nodes(struct shrinker *shrinker, unsigned long ret; /* list_lru lock nests inside IRQ-safe mapping->tree_lock */ @@ -27556,7 +28889,7 @@ diff -Nur linux-4.1.26.orig/mm/workingset.c linux-4.1.26/mm/workingset.c return ret; } -@@ -400,7 +401,7 @@ +@@ -400,7 +401,7 @@ static int __init workingset_init(void) { int ret; @@ -27565,7 +28898,7 @@ diff -Nur linux-4.1.26.orig/mm/workingset.c linux-4.1.26/mm/workingset.c if (ret) goto err; ret = register_shrinker(&workingset_shadow_shrinker); -@@ -408,7 +409,7 @@ +@@ -408,7 +409,7 @@ static int __init workingset_init(void) goto err_list_lru; return 0; err_list_lru: @@ -27574,10 +28907,33 @@ diff -Nur linux-4.1.26.orig/mm/workingset.c linux-4.1.26/mm/workingset.c err: return ret; } -diff -Nur linux-4.1.26.orig/net/core/dev.c linux-4.1.26/net/core/dev.c ---- linux-4.1.26.orig/net/core/dev.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/net/core/dev.c 2016-06-19 15:30:58.839303211 +0200 -@@ -184,6 +184,7 @@ +diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c +index fb1ec10ce449..e819dffd142c 100644 +--- a/mm/zsmalloc.c ++++ b/mm/zsmalloc.c +@@ -1289,7 +1289,7 @@ void *zs_map_object(struct zs_pool *pool, unsigned long handle, + class = pool->size_class[class_idx]; + off = obj_idx_to_offset(page, obj_idx, class->size); + +- area = &get_cpu_var(zs_map_area); ++ area = per_cpu_ptr(&zs_map_area, get_cpu_light()); + area->vm_mm = mm; + if (off + class->size <= PAGE_SIZE) { + /* this object is contained entirely within a page */ +@@ -1342,7 +1342,7 @@ void zs_unmap_object(struct zs_pool *pool, unsigned long handle) + + __zs_unmap_object(area, pages, off, class->size); + } +- put_cpu_var(zs_map_area); ++ put_cpu_light(); + unpin_tag(handle); + } + EXPORT_SYMBOL_GPL(zs_unmap_object); +diff --git a/net/core/dev.c b/net/core/dev.c +index 185a3398c651..78912da59fc1 100644 +--- a/net/core/dev.c ++++ b/net/core/dev.c +@@ -184,6 +184,7 @@ static unsigned int napi_gen_id; static DEFINE_HASHTABLE(napi_hash, 8); static seqcount_t devnet_rename_seq; @@ -27585,7 +28941,7 @@ diff -Nur linux-4.1.26.orig/net/core/dev.c linux-4.1.26/net/core/dev.c static inline void dev_base_seq_inc(struct net *net) { -@@ -205,14 +206,14 @@ +@@ -205,14 +206,14 @@ static inline struct hlist_head *dev_index_hash(struct net *net, int ifindex) static inline void rps_lock(struct softnet_data *sd) { #ifdef CONFIG_RPS @@ -27602,7 +28958,7 @@ diff -Nur linux-4.1.26.orig/net/core/dev.c linux-4.1.26/net/core/dev.c #endif } -@@ -852,7 +853,8 @@ +@@ -852,7 +853,8 @@ retry: strcpy(name, dev->name); rcu_read_unlock(); if (read_seqcount_retry(&devnet_rename_seq, seq)) { @@ -27612,7 +28968,7 @@ diff -Nur linux-4.1.26.orig/net/core/dev.c linux-4.1.26/net/core/dev.c goto retry; } -@@ -1121,20 +1123,17 @@ +@@ -1121,20 +1123,17 @@ int dev_change_name(struct net_device *dev, const char *newname) if (dev->flags & IFF_UP) return -EBUSY; @@ -27639,7 +28995,7 @@ diff -Nur linux-4.1.26.orig/net/core/dev.c linux-4.1.26/net/core/dev.c if (oldname[0] && !strchr(oldname, '%')) netdev_info(dev, "renamed from %s\n", oldname); -@@ -1147,11 +1146,12 @@ +@@ -1147,11 +1146,12 @@ rollback: if (ret) { memcpy(dev->name, oldname, IFNAMSIZ); dev->name_assign_type = old_assign_type; @@ -27655,7 +29011,7 @@ diff -Nur linux-4.1.26.orig/net/core/dev.c linux-4.1.26/net/core/dev.c netdev_adjacent_rename_links(dev, oldname); -@@ -1172,7 +1172,8 @@ +@@ -1172,7 +1172,8 @@ rollback: /* err >= 0 after dev_alloc_name() or stores the first errno */ if (err >= 0) { err = ret; @@ -27665,7 +29021,7 @@ diff -Nur linux-4.1.26.orig/net/core/dev.c linux-4.1.26/net/core/dev.c memcpy(dev->name, oldname, IFNAMSIZ); memcpy(oldname, newname, IFNAMSIZ); dev->name_assign_type = old_assign_type; -@@ -1185,6 +1186,11 @@ +@@ -1185,6 +1186,11 @@ rollback: } return err; @@ -27677,7 +29033,7 @@ diff -Nur linux-4.1.26.orig/net/core/dev.c linux-4.1.26/net/core/dev.c } /** -@@ -2214,6 +2220,7 @@ +@@ -2214,6 +2220,7 @@ static inline void __netif_reschedule(struct Qdisc *q) sd->output_queue_tailp = &q->next_sched; raise_softirq_irqoff(NET_TX_SOFTIRQ); local_irq_restore(flags); @@ -27685,7 +29041,7 @@ diff -Nur linux-4.1.26.orig/net/core/dev.c linux-4.1.26/net/core/dev.c } void __netif_schedule(struct Qdisc *q) -@@ -2295,6 +2302,7 @@ +@@ -2295,6 +2302,7 @@ void __dev_kfree_skb_irq(struct sk_buff *skb, enum skb_free_reason reason) __this_cpu_write(softnet_data.completion_queue, skb); raise_softirq_irqoff(NET_TX_SOFTIRQ); local_irq_restore(flags); @@ -27693,7 +29049,19 @@ diff -Nur linux-4.1.26.orig/net/core/dev.c linux-4.1.26/net/core/dev.c } EXPORT_SYMBOL(__dev_kfree_skb_irq); -@@ -2880,9 +2888,44 @@ +@@ -2820,7 +2828,11 @@ static inline int __dev_xmit_skb(struct sk_buff *skb, struct Qdisc *q, + * This permits __QDISC___STATE_RUNNING owner to get the lock more + * often and dequeue packets faster. + */ ++#ifdef CONFIG_PREEMPT_RT_FULL ++ contended = true; ++#else + contended = qdisc_is_running(q); ++#endif + if (unlikely(contended)) + spin_lock(&q->busylock); + +@@ -2880,9 +2892,44 @@ static void skb_update_prio(struct sk_buff *skb) #define skb_update_prio(skb) #endif @@ -27738,7 +29106,7 @@ diff -Nur linux-4.1.26.orig/net/core/dev.c linux-4.1.26/net/core/dev.c #define RECURSION_LIMIT 10 /** -@@ -2984,7 +3027,7 @@ +@@ -2984,7 +3031,7 @@ static int __dev_queue_xmit(struct sk_buff *skb, void *accel_priv) if (txq->xmit_lock_owner != cpu) { @@ -27747,7 +29115,7 @@ diff -Nur linux-4.1.26.orig/net/core/dev.c linux-4.1.26/net/core/dev.c goto recursion_alert; skb = validate_xmit_skb(skb, dev); -@@ -2994,9 +3037,9 @@ +@@ -2994,9 +3041,9 @@ static int __dev_queue_xmit(struct sk_buff *skb, void *accel_priv) HARD_TX_LOCK(dev, txq, cpu); if (!netif_xmit_stopped(txq)) { @@ -27759,7 +29127,7 @@ diff -Nur linux-4.1.26.orig/net/core/dev.c linux-4.1.26/net/core/dev.c if (dev_xmit_complete(rc)) { HARD_TX_UNLOCK(dev, txq); goto out; -@@ -3370,6 +3413,7 @@ +@@ -3370,6 +3417,7 @@ drop: rps_unlock(sd); local_irq_restore(flags); @@ -27767,7 +29135,7 @@ diff -Nur linux-4.1.26.orig/net/core/dev.c linux-4.1.26/net/core/dev.c atomic_long_inc(&skb->dev->rx_dropped); kfree_skb(skb); -@@ -3388,7 +3432,7 @@ +@@ -3388,7 +3436,7 @@ static int netif_rx_internal(struct sk_buff *skb) struct rps_dev_flow voidflow, *rflow = &voidflow; int cpu; @@ -27776,7 +29144,7 @@ diff -Nur linux-4.1.26.orig/net/core/dev.c linux-4.1.26/net/core/dev.c rcu_read_lock(); cpu = get_rps_cpu(skb->dev, skb, &rflow); -@@ -3398,13 +3442,13 @@ +@@ -3398,13 +3446,13 @@ static int netif_rx_internal(struct sk_buff *skb) ret = enqueue_to_backlog(skb, cpu, &rflow->last_qtail); rcu_read_unlock(); @@ -27793,7 +29161,7 @@ diff -Nur linux-4.1.26.orig/net/core/dev.c linux-4.1.26/net/core/dev.c } return ret; } -@@ -3438,16 +3482,44 @@ +@@ -3438,16 +3486,44 @@ int netif_rx_ni(struct sk_buff *skb) trace_netif_rx_ni_entry(skb); @@ -27842,7 +29210,7 @@ diff -Nur linux-4.1.26.orig/net/core/dev.c linux-4.1.26/net/core/dev.c static void net_tx_action(struct softirq_action *h) { struct softnet_data *sd = this_cpu_ptr(&softnet_data); -@@ -3489,7 +3561,7 @@ +@@ -3489,7 +3565,7 @@ static void net_tx_action(struct softirq_action *h) head = head->next_sched; root_lock = qdisc_lock(q); @@ -27851,7 +29219,7 @@ diff -Nur linux-4.1.26.orig/net/core/dev.c linux-4.1.26/net/core/dev.c smp_mb__before_atomic(); clear_bit(__QDISC_STATE_SCHED, &q->state); -@@ -3886,7 +3958,7 @@ +@@ -3886,7 +3962,7 @@ static void flush_backlog(void *arg) skb_queue_walk_safe(&sd->input_pkt_queue, skb, tmp) { if (skb->dev == dev) { __skb_unlink(skb, &sd->input_pkt_queue); @@ -27860,7 +29228,7 @@ diff -Nur linux-4.1.26.orig/net/core/dev.c linux-4.1.26/net/core/dev.c input_queue_head_incr(sd); } } -@@ -3895,10 +3967,13 @@ +@@ -3895,10 +3971,13 @@ static void flush_backlog(void *arg) skb_queue_walk_safe(&sd->process_queue, skb, tmp) { if (skb->dev == dev) { __skb_unlink(skb, &sd->process_queue); @@ -27875,7 +29243,7 @@ diff -Nur linux-4.1.26.orig/net/core/dev.c linux-4.1.26/net/core/dev.c } static int napi_gro_complete(struct sk_buff *skb) -@@ -4349,6 +4424,7 @@ +@@ -4349,6 +4428,7 @@ static void net_rps_action_and_irq_enable(struct softnet_data *sd) sd->rps_ipi_list = NULL; local_irq_enable(); @@ -27883,7 +29251,7 @@ diff -Nur linux-4.1.26.orig/net/core/dev.c linux-4.1.26/net/core/dev.c /* Send pending IPI's to kick RPS processing on remote cpus. */ while (remsd) { -@@ -4362,6 +4438,7 @@ +@@ -4362,6 +4442,7 @@ static void net_rps_action_and_irq_enable(struct softnet_data *sd) } else #endif local_irq_enable(); @@ -27891,7 +29259,7 @@ diff -Nur linux-4.1.26.orig/net/core/dev.c linux-4.1.26/net/core/dev.c } static bool sd_has_rps_ipi_waiting(struct softnet_data *sd) -@@ -4443,6 +4520,7 @@ +@@ -4443,6 +4524,7 @@ void __napi_schedule(struct napi_struct *n) local_irq_save(flags); ____napi_schedule(this_cpu_ptr(&softnet_data), n); local_irq_restore(flags); @@ -27899,7 +29267,7 @@ diff -Nur linux-4.1.26.orig/net/core/dev.c linux-4.1.26/net/core/dev.c } EXPORT_SYMBOL(__napi_schedule); -@@ -4717,7 +4795,7 @@ +@@ -4717,7 +4799,7 @@ static void net_rx_action(struct softirq_action *h) list_splice_tail(&repoll, &list); list_splice(&list, &sd->poll_list); if (!list_empty(&sd->poll_list)) @@ -27908,7 +29276,7 @@ diff -Nur linux-4.1.26.orig/net/core/dev.c linux-4.1.26/net/core/dev.c net_rps_action_and_irq_enable(sd); } -@@ -6931,7 +7009,7 @@ +@@ -6931,7 +7013,7 @@ EXPORT_SYMBOL(free_netdev); void synchronize_net(void) { might_sleep(); @@ -27917,7 +29285,7 @@ diff -Nur linux-4.1.26.orig/net/core/dev.c linux-4.1.26/net/core/dev.c synchronize_rcu_expedited(); else synchronize_rcu(); -@@ -7172,16 +7250,20 @@ +@@ -7172,16 +7254,20 @@ static int dev_cpu_callback(struct notifier_block *nfb, raise_softirq_irqoff(NET_TX_SOFTIRQ); local_irq_enable(); @@ -27939,7 +29307,7 @@ diff -Nur linux-4.1.26.orig/net/core/dev.c linux-4.1.26/net/core/dev.c return NOTIFY_OK; } -@@ -7483,8 +7565,9 @@ +@@ -7483,8 +7569,9 @@ static int __init net_dev_init(void) for_each_possible_cpu(i) { struct softnet_data *sd = &per_cpu(softnet_data, i); @@ -27951,9 +29319,10 @@ diff -Nur linux-4.1.26.orig/net/core/dev.c linux-4.1.26/net/core/dev.c INIT_LIST_HEAD(&sd->poll_list); sd->output_queue_tailp = &sd->output_queue; #ifdef CONFIG_RPS -diff -Nur linux-4.1.26.orig/net/core/skbuff.c linux-4.1.26/net/core/skbuff.c ---- linux-4.1.26.orig/net/core/skbuff.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/net/core/skbuff.c 2016-06-19 15:30:58.839303211 +0200 +diff --git a/net/core/skbuff.c b/net/core/skbuff.c +index c9793c6c5005..d4516d7d58aa 100644 +--- a/net/core/skbuff.c ++++ b/net/core/skbuff.c @@ -63,6 +63,7 @@ #include <linux/errqueue.h> #include <linux/prefetch.h> @@ -27962,7 +29331,7 @@ diff -Nur linux-4.1.26.orig/net/core/skbuff.c linux-4.1.26/net/core/skbuff.c #include <net/protocol.h> #include <net/dst.h> -@@ -358,6 +359,8 @@ +@@ -358,6 +359,8 @@ struct netdev_alloc_cache { }; static DEFINE_PER_CPU(struct netdev_alloc_cache, netdev_alloc_cache); static DEFINE_PER_CPU(struct netdev_alloc_cache, napi_alloc_cache); @@ -27971,7 +29340,7 @@ diff -Nur linux-4.1.26.orig/net/core/skbuff.c linux-4.1.26/net/core/skbuff.c static struct page *__page_frag_refill(struct netdev_alloc_cache *nc, gfp_t gfp_mask) -@@ -435,9 +438,9 @@ +@@ -435,9 +438,9 @@ static void *__netdev_alloc_frag(unsigned int fragsz, gfp_t gfp_mask) unsigned long flags; void *data; @@ -27983,7 +29352,7 @@ diff -Nur linux-4.1.26.orig/net/core/skbuff.c linux-4.1.26/net/core/skbuff.c return data; } -@@ -456,7 +459,12 @@ +@@ -456,7 +459,12 @@ EXPORT_SYMBOL(netdev_alloc_frag); static void *__napi_alloc_frag(unsigned int fragsz, gfp_t gfp_mask) { @@ -27997,10 +29366,11 @@ diff -Nur linux-4.1.26.orig/net/core/skbuff.c linux-4.1.26/net/core/skbuff.c } void *napi_alloc_frag(unsigned int fragsz) -diff -Nur linux-4.1.26.orig/net/core/sock.c linux-4.1.26/net/core/sock.c ---- linux-4.1.26.orig/net/core/sock.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/net/core/sock.c 2016-06-19 15:30:58.839303211 +0200 -@@ -2369,12 +2369,11 @@ +diff --git a/net/core/sock.c b/net/core/sock.c +index 47fc8bb3b946..23a1423f78ca 100644 +--- a/net/core/sock.c ++++ b/net/core/sock.c +@@ -2369,12 +2369,11 @@ void lock_sock_nested(struct sock *sk, int subclass) if (sk->sk_lock.owned) __lock_sock(sk); sk->sk_lock.owned = 1; @@ -28014,9 +29384,10 @@ diff -Nur linux-4.1.26.orig/net/core/sock.c linux-4.1.26/net/core/sock.c } EXPORT_SYMBOL(lock_sock_nested); -diff -Nur linux-4.1.26.orig/net/ipv4/icmp.c linux-4.1.26/net/ipv4/icmp.c ---- linux-4.1.26.orig/net/ipv4/icmp.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/net/ipv4/icmp.c 2016-06-19 15:30:58.839303211 +0200 +diff --git a/net/ipv4/icmp.c b/net/ipv4/icmp.c +index f5203fba6236..d7358c1ac63c 100644 +--- a/net/ipv4/icmp.c ++++ b/net/ipv4/icmp.c @@ -69,6 +69,7 @@ #include <linux/jiffies.h> #include <linux/kernel.h> @@ -28025,7 +29396,63 @@ diff -Nur linux-4.1.26.orig/net/ipv4/icmp.c linux-4.1.26/net/ipv4/icmp.c #include <linux/socket.h> #include <linux/in.h> #include <linux/inet.h> -@@ -867,6 +868,30 @@ +@@ -77,6 +78,7 @@ + #include <linux/string.h> + #include <linux/netfilter_ipv4.h> + #include <linux/slab.h> ++#include <linux/locallock.h> + #include <net/snmp.h> + #include <net/ip.h> + #include <net/route.h> +@@ -203,6 +205,8 @@ static const struct icmp_control icmp_pointers[NR_ICMP_TYPES+1]; + * + * On SMP we have one ICMP socket per-cpu. + */ ++static DEFINE_LOCAL_IRQ_LOCK(icmp_sk_lock); ++ + static struct sock *icmp_sk(struct net *net) + { + return *this_cpu_ptr(net->ipv4.icmp_sk); +@@ -214,12 +218,14 @@ static inline struct sock *icmp_xmit_lock(struct net *net) + + local_bh_disable(); + ++ local_lock(icmp_sk_lock); + sk = icmp_sk(net); + + if (unlikely(!spin_trylock(&sk->sk_lock.slock))) { + /* This can happen if the output path signals a + * dst_link_failure() for an outgoing ICMP packet. + */ ++ local_unlock(icmp_sk_lock); + local_bh_enable(); + return NULL; + } +@@ -229,6 +235,7 @@ static inline struct sock *icmp_xmit_lock(struct net *net) + static inline void icmp_xmit_unlock(struct sock *sk) + { + spin_unlock_bh(&sk->sk_lock.slock); ++ local_unlock(icmp_sk_lock); + } + + int sysctl_icmp_msgs_per_sec __read_mostly = 1000; +@@ -356,6 +363,7 @@ static void icmp_push_reply(struct icmp_bxm *icmp_param, + struct sock *sk; + struct sk_buff *skb; + ++ local_lock(icmp_sk_lock); + sk = icmp_sk(dev_net((*rt)->dst.dev)); + if (ip_append_data(sk, fl4, icmp_glue_bits, icmp_param, + icmp_param->data_len+icmp_param->head_len, +@@ -378,6 +386,7 @@ static void icmp_push_reply(struct icmp_bxm *icmp_param, + skb->ip_summed = CHECKSUM_NONE; + ip_push_pending_frames(sk, fl4); + } ++ local_unlock(icmp_sk_lock); + } + + /* +@@ -867,6 +876,30 @@ static bool icmp_redirect(struct sk_buff *skb) } /* @@ -28056,7 +29483,7 @@ diff -Nur linux-4.1.26.orig/net/ipv4/icmp.c linux-4.1.26/net/ipv4/icmp.c * Handle ICMP_ECHO ("ping") requests. * * RFC 1122: 3.2.2.6 MUST have an echo server that answers ICMP echo -@@ -893,6 +918,11 @@ +@@ -893,6 +926,11 @@ static bool icmp_echo(struct sk_buff *skb) icmp_param.data_len = skb->len; icmp_param.head_len = sizeof(struct icmphdr); icmp_reply(&icmp_param, skb); @@ -28068,10 +29495,11 @@ diff -Nur linux-4.1.26.orig/net/ipv4/icmp.c linux-4.1.26/net/ipv4/icmp.c } /* should there be an ICMP stat for ignored echos? */ return true; -diff -Nur linux-4.1.26.orig/net/ipv4/sysctl_net_ipv4.c linux-4.1.26/net/ipv4/sysctl_net_ipv4.c ---- linux-4.1.26.orig/net/ipv4/sysctl_net_ipv4.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/net/ipv4/sysctl_net_ipv4.c 2016-06-19 15:30:58.839303211 +0200 -@@ -779,6 +779,13 @@ +diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c +index f0e829735968..aff60d4abd7c 100644 +--- a/net/ipv4/sysctl_net_ipv4.c ++++ b/net/ipv4/sysctl_net_ipv4.c +@@ -779,6 +779,13 @@ static struct ctl_table ipv4_net_table[] = { .proc_handler = proc_dointvec }, { @@ -28085,10 +29513,58 @@ diff -Nur linux-4.1.26.orig/net/ipv4/sysctl_net_ipv4.c linux-4.1.26/net/ipv4/sys .procname = "icmp_ignore_bogus_error_responses", .data = &init_net.ipv4.sysctl_icmp_ignore_bogus_error_responses, .maxlen = sizeof(int), -diff -Nur linux-4.1.26.orig/net/mac80211/rx.c linux-4.1.26/net/mac80211/rx.c ---- linux-4.1.26.orig/net/mac80211/rx.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/net/mac80211/rx.c 2016-06-19 15:30:58.839303211 +0200 -@@ -3573,7 +3573,7 @@ +diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c +index 13b92d595138..6bfa68fb5f21 100644 +--- a/net/ipv4/tcp_ipv4.c ++++ b/net/ipv4/tcp_ipv4.c +@@ -62,6 +62,7 @@ + #include <linux/init.h> + #include <linux/times.h> + #include <linux/slab.h> ++#include <linux/locallock.h> + + #include <net/net_namespace.h> + #include <net/icmp.h> +@@ -563,6 +564,7 @@ void tcp_v4_send_check(struct sock *sk, struct sk_buff *skb) + } + EXPORT_SYMBOL(tcp_v4_send_check); + ++static DEFINE_LOCAL_IRQ_LOCK(tcp_sk_lock); + /* + * This routine will send an RST to the other tcp. + * +@@ -684,10 +686,13 @@ static void tcp_v4_send_reset(struct sock *sk, struct sk_buff *skb) + arg.bound_dev_if = sk->sk_bound_dev_if; + + arg.tos = ip_hdr(skb)->tos; ++ ++ local_lock(tcp_sk_lock); + ip_send_unicast_reply(*this_cpu_ptr(net->ipv4.tcp_sk), + skb, &TCP_SKB_CB(skb)->header.h4.opt, + ip_hdr(skb)->saddr, ip_hdr(skb)->daddr, + &arg, arg.iov[0].iov_len); ++ local_unlock(tcp_sk_lock); + + TCP_INC_STATS_BH(net, TCP_MIB_OUTSEGS); + TCP_INC_STATS_BH(net, TCP_MIB_OUTRSTS); +@@ -769,10 +774,12 @@ static void tcp_v4_send_ack(struct net *net, + if (oif) + arg.bound_dev_if = oif; + arg.tos = tos; ++ local_lock(tcp_sk_lock); + ip_send_unicast_reply(*this_cpu_ptr(net->ipv4.tcp_sk), + skb, &TCP_SKB_CB(skb)->header.h4.opt, + ip_hdr(skb)->saddr, ip_hdr(skb)->daddr, + &arg, arg.iov[0].iov_len); ++ local_unlock(tcp_sk_lock); + + TCP_INC_STATS_BH(net, TCP_MIB_OUTSEGS); + } +diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c +index 3073164a6fcf..d294ec1530b6 100644 +--- a/net/mac80211/rx.c ++++ b/net/mac80211/rx.c +@@ -3574,7 +3574,7 @@ void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb) struct ieee80211_supported_band *sband; struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); @@ -28097,9 +29573,10 @@ diff -Nur linux-4.1.26.orig/net/mac80211/rx.c linux-4.1.26/net/mac80211/rx.c if (WARN_ON(status->band >= IEEE80211_NUM_BANDS)) goto drop; -diff -Nur linux-4.1.26.orig/net/netfilter/core.c linux-4.1.26/net/netfilter/core.c ---- linux-4.1.26.orig/net/netfilter/core.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/net/netfilter/core.c 2016-06-19 15:30:58.839303211 +0200 +diff --git a/net/netfilter/core.c b/net/netfilter/core.c +index 5d0c6fd59475..e81489741143 100644 +--- a/net/netfilter/core.c ++++ b/net/netfilter/core.c @@ -22,11 +22,17 @@ #include <linux/proc_fs.h> #include <linux/mutex.h> @@ -28118,9 +29595,10 @@ diff -Nur linux-4.1.26.orig/net/netfilter/core.c linux-4.1.26/net/netfilter/core static DEFINE_MUTEX(afinfo_mutex); const struct nf_afinfo __rcu *nf_afinfo[NFPROTO_NUMPROTO] __read_mostly; -diff -Nur linux-4.1.26.orig/net/packet/af_packet.c linux-4.1.26/net/packet/af_packet.c ---- linux-4.1.26.orig/net/packet/af_packet.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/net/packet/af_packet.c 2016-06-19 15:30:58.839303211 +0200 +diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c +index a3654d929814..7c1054d808fc 100644 +--- a/net/packet/af_packet.c ++++ b/net/packet/af_packet.c @@ -63,6 +63,7 @@ #include <linux/if_packet.h> #include <linux/wireless.h> @@ -28129,7 +29607,7 @@ diff -Nur linux-4.1.26.orig/net/packet/af_packet.c linux-4.1.26/net/packet/af_pa #include <linux/kmod.h> #include <linux/slab.h> #include <linux/vmalloc.h> -@@ -698,7 +699,7 @@ +@@ -698,7 +699,7 @@ static void prb_retire_rx_blk_timer_expired(unsigned long data) if (BLOCK_NUM_PKTS(pbd)) { while (atomic_read(&pkc->blk_fill_in_prog)) { /* Waiting for skb_copy_bits to finish... */ @@ -28138,7 +29616,7 @@ diff -Nur linux-4.1.26.orig/net/packet/af_packet.c linux-4.1.26/net/packet/af_pa } } -@@ -960,7 +961,7 @@ +@@ -960,7 +961,7 @@ static void prb_retire_current_block(struct tpacket_kbdq_core *pkc, if (!(status & TP_STATUS_BLK_TMO)) { while (atomic_read(&pkc->blk_fill_in_prog)) { /* Waiting for skb_copy_bits to finish... */ @@ -28147,9 +29625,10 @@ diff -Nur linux-4.1.26.orig/net/packet/af_packet.c linux-4.1.26/net/packet/af_pa } } prb_close_block(pkc, pbd, po, status); -diff -Nur linux-4.1.26.orig/net/rds/ib_rdma.c linux-4.1.26/net/rds/ib_rdma.c ---- linux-4.1.26.orig/net/rds/ib_rdma.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/net/rds/ib_rdma.c 2016-06-19 15:30:58.843303365 +0200 +diff --git a/net/rds/ib_rdma.c b/net/rds/ib_rdma.c +index 657ba9f5d308..c8faaf36423a 100644 +--- a/net/rds/ib_rdma.c ++++ b/net/rds/ib_rdma.c @@ -34,6 +34,7 @@ #include <linux/slab.h> #include <linux/rculist.h> @@ -28158,7 +29637,7 @@ diff -Nur linux-4.1.26.orig/net/rds/ib_rdma.c linux-4.1.26/net/rds/ib_rdma.c #include "rds.h" #include "ib.h" -@@ -286,7 +287,7 @@ +@@ -286,7 +287,7 @@ static inline void wait_clean_list_grace(void) for_each_online_cpu(cpu) { flag = &per_cpu(clean_list_grace, cpu); while (test_bit(CLEAN_LIST_BUSY_BIT, flag)) @@ -28167,10 +29646,11 @@ diff -Nur linux-4.1.26.orig/net/rds/ib_rdma.c linux-4.1.26/net/rds/ib_rdma.c } } -diff -Nur linux-4.1.26.orig/net/sched/sch_generic.c linux-4.1.26/net/sched/sch_generic.c ---- linux-4.1.26.orig/net/sched/sch_generic.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/net/sched/sch_generic.c 2016-06-19 15:30:58.843303365 +0200 -@@ -896,7 +896,7 @@ +diff --git a/net/sched/sch_generic.c b/net/sched/sch_generic.c +index 9821e6d641bb..c6bf6ea6d1d5 100644 +--- a/net/sched/sch_generic.c ++++ b/net/sched/sch_generic.c +@@ -899,7 +899,7 @@ void dev_deactivate_many(struct list_head *head) /* Wait for outstanding qdisc_run calls. */ list_for_each_entry(dev, head, close_list) while (some_qdisc_is_busy(dev)) @@ -28179,10 +29659,11 @@ diff -Nur linux-4.1.26.orig/net/sched/sch_generic.c linux-4.1.26/net/sched/sch_g } void dev_deactivate(struct net_device *dev) -diff -Nur linux-4.1.26.orig/net/sunrpc/svc_xprt.c linux-4.1.26/net/sunrpc/svc_xprt.c ---- linux-4.1.26.orig/net/sunrpc/svc_xprt.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/net/sunrpc/svc_xprt.c 2016-06-19 15:30:58.843303365 +0200 -@@ -341,7 +341,7 @@ +diff --git a/net/sunrpc/svc_xprt.c b/net/sunrpc/svc_xprt.c +index 163ac45c3639..ba2313cd4e36 100644 +--- a/net/sunrpc/svc_xprt.c ++++ b/net/sunrpc/svc_xprt.c +@@ -341,7 +341,7 @@ static void svc_xprt_do_enqueue(struct svc_xprt *xprt) goto out; } @@ -28191,7 +29672,7 @@ diff -Nur linux-4.1.26.orig/net/sunrpc/svc_xprt.c linux-4.1.26/net/sunrpc/svc_xp pool = svc_pool_for_cpu(xprt->xpt_server, cpu); atomic_long_inc(&pool->sp_stats.packets); -@@ -377,7 +377,7 @@ +@@ -377,7 +377,7 @@ redo_search: atomic_long_inc(&pool->sp_stats.threads_woken); wake_up_process(rqstp->rq_task); @@ -28200,7 +29681,7 @@ diff -Nur linux-4.1.26.orig/net/sunrpc/svc_xprt.c linux-4.1.26/net/sunrpc/svc_xp goto out; } rcu_read_unlock(); -@@ -398,7 +398,7 @@ +@@ -398,7 +398,7 @@ redo_search: goto redo_search; } rqstp = NULL; @@ -28209,10 +29690,11 @@ diff -Nur linux-4.1.26.orig/net/sunrpc/svc_xprt.c linux-4.1.26/net/sunrpc/svc_xp out: trace_svc_xprt_do_enqueue(xprt, rqstp); } -diff -Nur linux-4.1.26.orig/scripts/mkcompile_h linux-4.1.26/scripts/mkcompile_h ---- linux-4.1.26.orig/scripts/mkcompile_h 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/scripts/mkcompile_h 2016-06-19 15:30:58.843303365 +0200 -@@ -4,7 +4,8 @@ +diff --git a/scripts/mkcompile_h b/scripts/mkcompile_h +index 6fdc97ef6023..523e0420d7f0 100755 +--- a/scripts/mkcompile_h ++++ b/scripts/mkcompile_h +@@ -4,7 +4,8 @@ TARGET=$1 ARCH=$2 SMP=$3 PREEMPT=$4 @@ -28222,7 +29704,7 @@ diff -Nur linux-4.1.26.orig/scripts/mkcompile_h linux-4.1.26/scripts/mkcompile_h vecho() { [ "${quiet}" = "silent_" ] || echo "$@" ; } -@@ -57,6 +58,7 @@ +@@ -57,6 +58,7 @@ UTS_VERSION="#$VERSION" CONFIG_FLAGS="" if [ -n "$SMP" ] ; then CONFIG_FLAGS="SMP"; fi if [ -n "$PREEMPT" ] ; then CONFIG_FLAGS="$CONFIG_FLAGS PREEMPT"; fi @@ -28230,10 +29712,11 @@ diff -Nur linux-4.1.26.orig/scripts/mkcompile_h linux-4.1.26/scripts/mkcompile_h UTS_VERSION="$UTS_VERSION $CONFIG_FLAGS $TIMESTAMP" # Truncate to maximum length -diff -Nur linux-4.1.26.orig/sound/core/pcm_native.c linux-4.1.26/sound/core/pcm_native.c ---- linux-4.1.26.orig/sound/core/pcm_native.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/sound/core/pcm_native.c 2016-06-19 15:30:58.843303365 +0200 -@@ -135,7 +135,7 @@ +diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c +index aa999e747c94..8195f789c680 100644 +--- a/sound/core/pcm_native.c ++++ b/sound/core/pcm_native.c +@@ -135,7 +135,7 @@ EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock); void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream) { if (!substream->pcm->nonatomic) @@ -28242,7 +29725,7 @@ diff -Nur linux-4.1.26.orig/sound/core/pcm_native.c linux-4.1.26/sound/core/pcm_ snd_pcm_stream_lock(substream); } EXPORT_SYMBOL_GPL(snd_pcm_stream_lock_irq); -@@ -150,7 +150,7 @@ +@@ -150,7 +150,7 @@ void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream) { snd_pcm_stream_unlock(substream); if (!substream->pcm->nonatomic) @@ -28251,7 +29734,7 @@ diff -Nur linux-4.1.26.orig/sound/core/pcm_native.c linux-4.1.26/sound/core/pcm_ } EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irq); -@@ -158,7 +158,7 @@ +@@ -158,7 +158,7 @@ unsigned long _snd_pcm_stream_lock_irqsave(struct snd_pcm_substream *substream) { unsigned long flags = 0; if (!substream->pcm->nonatomic) @@ -28260,7 +29743,7 @@ diff -Nur linux-4.1.26.orig/sound/core/pcm_native.c linux-4.1.26/sound/core/pcm_ snd_pcm_stream_lock(substream); return flags; } -@@ -176,7 +176,7 @@ +@@ -176,7 +176,7 @@ void snd_pcm_stream_unlock_irqrestore(struct snd_pcm_substream *substream, { snd_pcm_stream_unlock(substream); if (!substream->pcm->nonatomic) @@ -28269,10 +29752,11 @@ diff -Nur linux-4.1.26.orig/sound/core/pcm_native.c linux-4.1.26/sound/core/pcm_ } EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irqrestore); -diff -Nur linux-4.1.26.orig/sound/soc/intel/atom/sst/sst.c linux-4.1.26/sound/soc/intel/atom/sst/sst.c ---- linux-4.1.26.orig/sound/soc/intel/atom/sst/sst.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/sound/soc/intel/atom/sst/sst.c 2016-06-19 15:30:58.843303365 +0200 -@@ -368,8 +368,8 @@ +diff --git a/sound/soc/intel/atom/sst/sst.c b/sound/soc/intel/atom/sst/sst.c +index 96c2e420cce6..a4b458e77089 100644 +--- a/sound/soc/intel/atom/sst/sst.c ++++ b/sound/soc/intel/atom/sst/sst.c +@@ -368,8 +368,8 @@ static inline void sst_restore_shim64(struct intel_sst_drv *ctx, * initialize by FW or driver when firmware is loaded */ spin_lock_irqsave(&ctx->ipc_spin_lock, irq_flags); @@ -28283,10 +29767,11 @@ diff -Nur linux-4.1.26.orig/sound/soc/intel/atom/sst/sst.c linux-4.1.26/sound/so spin_unlock_irqrestore(&ctx->ipc_spin_lock, irq_flags); } -diff -Nur linux-4.1.26.orig/virt/kvm/async_pf.c linux-4.1.26/virt/kvm/async_pf.c ---- linux-4.1.26.orig/virt/kvm/async_pf.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/virt/kvm/async_pf.c 2016-06-19 15:30:58.843303365 +0200 -@@ -94,8 +94,8 @@ +diff --git a/virt/kvm/async_pf.c b/virt/kvm/async_pf.c +index f84f5856520a..9b0cd1b03222 100644 +--- a/virt/kvm/async_pf.c ++++ b/virt/kvm/async_pf.c +@@ -94,8 +94,8 @@ static void async_pf_execute(struct work_struct *work) trace_kvm_async_pf_completed(addr, gva); @@ -28297,10 +29782,11 @@ diff -Nur linux-4.1.26.orig/virt/kvm/async_pf.c linux-4.1.26/virt/kvm/async_pf.c mmput(mm); kvm_put_kvm(vcpu->kvm); -diff -Nur linux-4.1.26.orig/virt/kvm/kvm_main.c linux-4.1.26/virt/kvm/kvm_main.c ---- linux-4.1.26.orig/virt/kvm/kvm_main.c 2016-06-07 01:13:11.000000000 +0200 -+++ linux-4.1.26/virt/kvm/kvm_main.c 2016-06-19 15:30:58.843303365 +0200 -@@ -218,7 +218,7 @@ +diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c +index f9746f29f870..3424e7fe6678 100644 +--- a/virt/kvm/kvm_main.c ++++ b/virt/kvm/kvm_main.c +@@ -220,7 +220,7 @@ int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id) vcpu->kvm = kvm; vcpu->vcpu_id = id; vcpu->pid = NULL; @@ -28309,7 +29795,7 @@ diff -Nur linux-4.1.26.orig/virt/kvm/kvm_main.c linux-4.1.26/virt/kvm/kvm_main.c kvm_async_pf_vcpu_init(vcpu); page = alloc_page(GFP_KERNEL | __GFP_ZERO); -@@ -1780,7 +1780,7 @@ +@@ -1782,7 +1782,7 @@ static int kvm_vcpu_check_block(struct kvm_vcpu *vcpu) void kvm_vcpu_block(struct kvm_vcpu *vcpu) { ktime_t start, cur; @@ -28318,7 +29804,7 @@ diff -Nur linux-4.1.26.orig/virt/kvm/kvm_main.c linux-4.1.26/virt/kvm/kvm_main.c bool waited = false; start = cur = ktime_get(); -@@ -1801,7 +1801,7 @@ +@@ -1803,7 +1803,7 @@ void kvm_vcpu_block(struct kvm_vcpu *vcpu) } for (;;) { @@ -28327,7 +29813,7 @@ diff -Nur linux-4.1.26.orig/virt/kvm/kvm_main.c linux-4.1.26/virt/kvm/kvm_main.c if (kvm_vcpu_check_block(vcpu) < 0) break; -@@ -1810,7 +1810,7 @@ +@@ -1812,7 +1812,7 @@ void kvm_vcpu_block(struct kvm_vcpu *vcpu) schedule(); } @@ -28336,7 +29822,7 @@ diff -Nur linux-4.1.26.orig/virt/kvm/kvm_main.c linux-4.1.26/virt/kvm/kvm_main.c cur = ktime_get(); out: -@@ -1826,11 +1826,11 @@ +@@ -1828,11 +1828,11 @@ void kvm_vcpu_kick(struct kvm_vcpu *vcpu) { int me; int cpu = vcpu->cpu; @@ -28351,7 +29837,7 @@ diff -Nur linux-4.1.26.orig/virt/kvm/kvm_main.c linux-4.1.26/virt/kvm/kvm_main.c ++vcpu->stat.halt_wakeup; } -@@ -1931,7 +1931,7 @@ +@@ -1933,7 +1933,7 @@ void kvm_vcpu_on_spin(struct kvm_vcpu *me) continue; if (vcpu == me) continue; diff --git a/target/linux/patches/4.8.5/crisv32.patch b/target/linux/patches/4.8.6/crisv32.patch index cb9b0d028..cb9b0d028 100644 --- a/target/linux/patches/4.8.5/crisv32.patch +++ b/target/linux/patches/4.8.6/crisv32.patch diff --git a/target/linux/patches/4.8.5/crisv32_ethernet_driver.patch b/target/linux/patches/4.8.6/crisv32_ethernet_driver.patch index 0cef202fc..0cef202fc 100644 --- a/target/linux/patches/4.8.5/crisv32_ethernet_driver.patch +++ b/target/linux/patches/4.8.6/crisv32_ethernet_driver.patch diff --git a/target/linux/patches/4.8.5/initramfs-nosizelimit.patch b/target/linux/patches/4.8.6/initramfs-nosizelimit.patch index 40d2f6bd8..40d2f6bd8 100644 --- a/target/linux/patches/4.8.5/initramfs-nosizelimit.patch +++ b/target/linux/patches/4.8.6/initramfs-nosizelimit.patch diff --git a/target/linux/patches/4.8.5/ld-or1k.patch b/target/linux/patches/4.8.6/ld-or1k.patch index 264f9166f..264f9166f 100644 --- a/target/linux/patches/4.8.5/ld-or1k.patch +++ b/target/linux/patches/4.8.6/ld-or1k.patch diff --git a/target/linux/patches/4.8.5/macsonic.patch b/target/linux/patches/4.8.6/macsonic.patch index 75a6fcad2..75a6fcad2 100644 --- a/target/linux/patches/4.8.5/macsonic.patch +++ b/target/linux/patches/4.8.6/macsonic.patch diff --git a/target/linux/patches/4.8.6/patch-realtime b/target/linux/patches/4.8.6/patch-realtime new file mode 100644 index 000000000..6a856dad7 --- /dev/null +++ b/target/linux/patches/4.8.6/patch-realtime @@ -0,0 +1,25908 @@ +diff --git a/Documentation/hwlat_detector.txt b/Documentation/hwlat_detector.txt +new file mode 100644 +index 000000000000..cb61516483d3 +--- /dev/null ++++ b/Documentation/hwlat_detector.txt +@@ -0,0 +1,64 @@ ++Introduction: ++------------- ++ ++The module hwlat_detector is a special purpose kernel module that is used to ++detect large system latencies induced by the behavior of certain underlying ++hardware or firmware, independent of Linux itself. The code was developed ++originally to detect SMIs (System Management Interrupts) on x86 systems, ++however there is nothing x86 specific about this patchset. It was ++originally written for use by the "RT" patch since the Real Time ++kernel is highly latency sensitive. ++ ++SMIs are usually not serviced by the Linux kernel, which typically does not ++even know that they are occuring. SMIs are instead are set up by BIOS code ++and are serviced by BIOS code, usually for "critical" events such as ++management of thermal sensors and fans. Sometimes though, SMIs are used for ++other tasks and those tasks can spend an inordinate amount of time in the ++handler (sometimes measured in milliseconds). Obviously this is a problem if ++you are trying to keep event service latencies down in the microsecond range. ++ ++The hardware latency detector works by hogging all of the cpus for configurable ++amounts of time (by calling stop_machine()), polling the CPU Time Stamp Counter ++for some period, then looking for gaps in the TSC data. Any gap indicates a ++time when the polling was interrupted and since the machine is stopped and ++interrupts turned off the only thing that could do that would be an SMI. ++ ++Note that the SMI detector should *NEVER* be used in a production environment. ++It is intended to be run manually to determine if the hardware platform has a ++problem with long system firmware service routines. ++ ++Usage: ++------ ++ ++Loading the module hwlat_detector passing the parameter "enabled=1" (or by ++setting the "enable" entry in "hwlat_detector" debugfs toggled on) is the only ++step required to start the hwlat_detector. It is possible to redefine the ++threshold in microseconds (us) above which latency spikes will be taken ++into account (parameter "threshold="). ++ ++Example: ++ ++ # modprobe hwlat_detector enabled=1 threshold=100 ++ ++After the module is loaded, it creates a directory named "hwlat_detector" under ++the debugfs mountpoint, "/debug/hwlat_detector" for this text. It is necessary ++to have debugfs mounted, which might be on /sys/debug on your system. ++ ++The /debug/hwlat_detector interface contains the following files: ++ ++count - number of latency spikes observed since last reset ++enable - a global enable/disable toggle (0/1), resets count ++max - maximum hardware latency actually observed (usecs) ++sample - a pipe from which to read current raw sample data ++ in the format <timestamp> <latency observed usecs> ++ (can be opened O_NONBLOCK for a single sample) ++threshold - minimum latency value to be considered (usecs) ++width - time period to sample with CPUs held (usecs) ++ must be less than the total window size (enforced) ++window - total period of sampling, width being inside (usecs) ++ ++By default we will set width to 500,000 and window to 1,000,000, meaning that ++we will sample every 1,000,000 usecs (1s) for 500,000 usecs (0.5s). If we ++observe any latencies that exceed the threshold (initially 100 usecs), ++then we write to a global sample ring buffer of 8K samples, which is ++consumed by reading from the "sample" (pipe) debugfs file interface. +diff --git a/Documentation/sysrq.txt b/Documentation/sysrq.txt +index 3a3b30ac2a75..9e0745cafbd8 100644 +--- a/Documentation/sysrq.txt ++++ b/Documentation/sysrq.txt +@@ -59,10 +59,17 @@ On PowerPC - Press 'ALT - Print Screen (or F13) - <command key>, + On other - If you know of the key combos for other architectures, please + let me know so I can add them to this section. + +-On all - write a character to /proc/sysrq-trigger. e.g.: +- ++On all - write a character to /proc/sysrq-trigger, e.g.: + echo t > /proc/sysrq-trigger + ++On all - Enable network SysRq by writing a cookie to icmp_echo_sysrq, e.g. ++ echo 0x01020304 >/proc/sys/net/ipv4/icmp_echo_sysrq ++ Send an ICMP echo request with this pattern plus the particular ++ SysRq command key. Example: ++ # ping -c1 -s57 -p0102030468 ++ will trigger the SysRq-H (help) command. ++ ++ + * What are the 'command' keys? + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + 'b' - Will immediately reboot the system without syncing or unmounting +diff --git a/Documentation/trace/histograms.txt b/Documentation/trace/histograms.txt +new file mode 100644 +index 000000000000..6f2aeabf7faa +--- /dev/null ++++ b/Documentation/trace/histograms.txt +@@ -0,0 +1,186 @@ ++ Using the Linux Kernel Latency Histograms ++ ++ ++This document gives a short explanation how to enable, configure and use ++latency histograms. Latency histograms are primarily relevant in the ++context of real-time enabled kernels (CONFIG_PREEMPT/CONFIG_PREEMPT_RT) ++and are used in the quality management of the Linux real-time ++capabilities. ++ ++ ++* Purpose of latency histograms ++ ++A latency histogram continuously accumulates the frequencies of latency ++data. There are two types of histograms ++- potential sources of latencies ++- effective latencies ++ ++ ++* Potential sources of latencies ++ ++Potential sources of latencies are code segments where interrupts, ++preemption or both are disabled (aka critical sections). To create ++histograms of potential sources of latency, the kernel stores the time ++stamp at the start of a critical section, determines the time elapsed ++when the end of the section is reached, and increments the frequency ++counter of that latency value - irrespective of whether any concurrently ++running process is affected by latency or not. ++- Configuration items (in the Kernel hacking/Tracers submenu) ++ CONFIG_INTERRUPT_OFF_LATENCY ++ CONFIG_PREEMPT_OFF_LATENCY ++ ++ ++* Effective latencies ++ ++Effective latencies are actually occuring during wakeup of a process. To ++determine effective latencies, the kernel stores the time stamp when a ++process is scheduled to be woken up, and determines the duration of the ++wakeup time shortly before control is passed over to this process. Note ++that the apparent latency in user space may be somewhat longer, since the ++process may be interrupted after control is passed over to it but before ++the execution in user space takes place. Simply measuring the interval ++between enqueuing and wakeup may also not appropriate in cases when a ++process is scheduled as a result of a timer expiration. The timer may have ++missed its deadline, e.g. due to disabled interrupts, but this latency ++would not be registered. Therefore, the offsets of missed timers are ++recorded in a separate histogram. If both wakeup latency and missed timer ++offsets are configured and enabled, a third histogram may be enabled that ++records the overall latency as a sum of the timer latency, if any, and the ++wakeup latency. This histogram is called "timerandwakeup". ++- Configuration items (in the Kernel hacking/Tracers submenu) ++ CONFIG_WAKEUP_LATENCY ++ CONFIG_MISSED_TIMER_OFSETS ++ ++ ++* Usage ++ ++The interface to the administration of the latency histograms is located ++in the debugfs file system. To mount it, either enter ++ ++mount -t sysfs nodev /sys ++mount -t debugfs nodev /sys/kernel/debug ++ ++from shell command line level, or add ++ ++nodev /sys sysfs defaults 0 0 ++nodev /sys/kernel/debug debugfs defaults 0 0 ++ ++to the file /etc/fstab. All latency histogram related files are then ++available in the directory /sys/kernel/debug/tracing/latency_hist. A ++particular histogram type is enabled by writing non-zero to the related ++variable in the /sys/kernel/debug/tracing/latency_hist/enable directory. ++Select "preemptirqsoff" for the histograms of potential sources of ++latencies and "wakeup" for histograms of effective latencies etc. The ++histogram data - one per CPU - are available in the files ++ ++/sys/kernel/debug/tracing/latency_hist/preemptoff/CPUx ++/sys/kernel/debug/tracing/latency_hist/irqsoff/CPUx ++/sys/kernel/debug/tracing/latency_hist/preemptirqsoff/CPUx ++/sys/kernel/debug/tracing/latency_hist/wakeup/CPUx ++/sys/kernel/debug/tracing/latency_hist/wakeup/sharedprio/CPUx ++/sys/kernel/debug/tracing/latency_hist/missed_timer_offsets/CPUx ++/sys/kernel/debug/tracing/latency_hist/timerandwakeup/CPUx ++ ++The histograms are reset by writing non-zero to the file "reset" in a ++particular latency directory. To reset all latency data, use ++ ++#!/bin/sh ++ ++TRACINGDIR=/sys/kernel/debug/tracing ++HISTDIR=$TRACINGDIR/latency_hist ++ ++if test -d $HISTDIR ++then ++ cd $HISTDIR ++ for i in `find . | grep /reset$` ++ do ++ echo 1 >$i ++ done ++fi ++ ++ ++* Data format ++ ++Latency data are stored with a resolution of one microsecond. The ++maximum latency is 10,240 microseconds. The data are only valid, if the ++overflow register is empty. Every output line contains the latency in ++microseconds in the first row and the number of samples in the second ++row. To display only lines with a positive latency count, use, for ++example, ++ ++grep -v " 0$" /sys/kernel/debug/tracing/latency_hist/preemptoff/CPU0 ++ ++#Minimum latency: 0 microseconds. ++#Average latency: 0 microseconds. ++#Maximum latency: 25 microseconds. ++#Total samples: 3104770694 ++#There are 0 samples greater or equal than 10240 microseconds ++#usecs samples ++ 0 2984486876 ++ 1 49843506 ++ 2 58219047 ++ 3 5348126 ++ 4 2187960 ++ 5 3388262 ++ 6 959289 ++ 7 208294 ++ 8 40420 ++ 9 4485 ++ 10 14918 ++ 11 18340 ++ 12 25052 ++ 13 19455 ++ 14 5602 ++ 15 969 ++ 16 47 ++ 17 18 ++ 18 14 ++ 19 1 ++ 20 3 ++ 21 2 ++ 22 5 ++ 23 2 ++ 25 1 ++ ++ ++* Wakeup latency of a selected process ++ ++To only collect wakeup latency data of a particular process, write the ++PID of the requested process to ++ ++/sys/kernel/debug/tracing/latency_hist/wakeup/pid ++ ++PIDs are not considered, if this variable is set to 0. ++ ++ ++* Details of the process with the highest wakeup latency so far ++ ++Selected data of the process that suffered from the highest wakeup ++latency that occurred in a particular CPU are available in the file ++ ++/sys/kernel/debug/tracing/latency_hist/wakeup/max_latency-CPUx. ++ ++In addition, other relevant system data at the time when the ++latency occurred are given. ++ ++The format of the data is (all in one line): ++<PID> <Priority> <Latency> (<Timeroffset>) <Command> \ ++<- <PID> <Priority> <Command> <Timestamp> ++ ++The value of <Timeroffset> is only relevant in the combined timer ++and wakeup latency recording. In the wakeup recording, it is ++always 0, in the missed_timer_offsets recording, it is the same ++as <Latency>. ++ ++When retrospectively searching for the origin of a latency and ++tracing was not enabled, it may be helpful to know the name and ++some basic data of the task that (finally) was switching to the ++late real-tlme task. In addition to the victim's data, also the ++data of the possible culprit are therefore displayed after the ++"<-" symbol. ++ ++Finally, the timestamp of the time when the latency occurred ++in <seconds>.<microseconds> after the most recent system boot ++is provided. ++ ++These data are also reset when the wakeup histogram is reset. +diff --git a/Makefile b/Makefile +index b249529204cd..5d699d055995 100644 +--- a/Makefile ++++ b/Makefile +@@ -398,12 +398,12 @@ KBUILD_CPPFLAGS := -D__KERNEL__ + KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ + -fno-strict-aliasing -fno-common \ + -Werror-implicit-function-declaration \ +- -Wno-format-security \ ++ -Wno-format-security -fno-PIE \ + -std=gnu89 + + KBUILD_AFLAGS_KERNEL := + KBUILD_CFLAGS_KERNEL := +-KBUILD_AFLAGS := -D__ASSEMBLY__ ++KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE + KBUILD_AFLAGS_MODULE := -DMODULE + KBUILD_CFLAGS_MODULE := -DMODULE + KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds +diff --git a/arch/Kconfig b/arch/Kconfig +index fd6e9712af81..085134ee13e9 100644 +--- a/arch/Kconfig ++++ b/arch/Kconfig +@@ -9,6 +9,7 @@ config OPROFILE + tristate "OProfile system profiling" + depends on PROFILING + depends on HAVE_OPROFILE ++ depends on !PREEMPT_RT_FULL + select RING_BUFFER + select RING_BUFFER_ALLOW_SWAP + help +@@ -52,6 +53,7 @@ config KPROBES + config JUMP_LABEL + bool "Optimize very unlikely/likely branches" + depends on HAVE_ARCH_JUMP_LABEL ++ depends on (!INTERRUPT_OFF_HIST && !PREEMPT_OFF_HIST && !WAKEUP_LATENCY_HIST && !MISSED_TIMER_OFFSETS_HIST) + help + This option enables a transparent branch optimization that + makes certain almost-always-true or almost-always-false branch +diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig +index a9c4e48bb7ec..6eefe4f32302 100644 +--- a/arch/arm/Kconfig ++++ b/arch/arm/Kconfig +@@ -36,7 +36,7 @@ config ARM + select HAVE_ARCH_AUDITSYSCALL if (AEABI && !OABI_COMPAT) + select HAVE_ARCH_BITREVERSE if (CPU_32v7M || CPU_32v7) && !CPU_32v6 + select HAVE_ARCH_HARDENED_USERCOPY +- select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL && !CPU_ENDIAN_BE32 && MMU ++ select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL && !CPU_ENDIAN_BE32 && MMU && !PREEMPT_RT_BASE + select HAVE_ARCH_KGDB if !CPU_ENDIAN_BE32 && MMU + select HAVE_ARCH_MMAP_RND_BITS if MMU + select HAVE_ARCH_SECCOMP_FILTER if (AEABI && !OABI_COMPAT) +@@ -75,6 +75,7 @@ config ARM + select HAVE_PERF_EVENTS + select HAVE_PERF_REGS + select HAVE_PERF_USER_STACK_DUMP ++ select HAVE_PREEMPT_LAZY + select HAVE_RCU_TABLE_FREE if (SMP && ARM_LPAE) + select HAVE_REGS_AND_STACK_ACCESS_API + select HAVE_SYSCALL_TRACEPOINTS +diff --git a/arch/arm/include/asm/switch_to.h b/arch/arm/include/asm/switch_to.h +index 12ebfcc1d539..c962084605bc 100644 +--- a/arch/arm/include/asm/switch_to.h ++++ b/arch/arm/include/asm/switch_to.h +@@ -3,6 +3,13 @@ + + #include <linux/thread_info.h> + ++#if defined CONFIG_PREEMPT_RT_FULL && defined CONFIG_HIGHMEM ++void switch_kmaps(struct task_struct *prev_p, struct task_struct *next_p); ++#else ++static inline void ++switch_kmaps(struct task_struct *prev_p, struct task_struct *next_p) { } ++#endif ++ + /* + * For v7 SMP cores running a preemptible kernel we may be pre-empted + * during a TLB maintenance operation, so execute an inner-shareable dsb +@@ -25,6 +32,7 @@ extern struct task_struct *__switch_to(struct task_struct *, struct thread_info + #define switch_to(prev,next,last) \ + do { \ + __complete_pending_tlbi(); \ ++ switch_kmaps(prev, next); \ + last = __switch_to(prev,task_thread_info(prev), task_thread_info(next)); \ + } while (0) + +diff --git a/arch/arm/include/asm/thread_info.h b/arch/arm/include/asm/thread_info.h +index 776757d1604a..1f36a4eccc72 100644 +--- a/arch/arm/include/asm/thread_info.h ++++ b/arch/arm/include/asm/thread_info.h +@@ -49,6 +49,7 @@ struct cpu_context_save { + struct thread_info { + unsigned long flags; /* low level flags */ + int preempt_count; /* 0 => preemptable, <0 => bug */ ++ int preempt_lazy_count; /* 0 => preemptable, <0 => bug */ + mm_segment_t addr_limit; /* address limit */ + struct task_struct *task; /* main task structure */ + __u32 cpu; /* cpu */ +@@ -142,7 +143,8 @@ extern int vfp_restore_user_hwstate(struct user_vfp __user *, + #define TIF_SYSCALL_TRACE 4 /* syscall trace active */ + #define TIF_SYSCALL_AUDIT 5 /* syscall auditing active */ + #define TIF_SYSCALL_TRACEPOINT 6 /* syscall tracepoint instrumentation */ +-#define TIF_SECCOMP 7 /* seccomp syscall filtering active */ ++#define TIF_SECCOMP 8 /* seccomp syscall filtering active */ ++#define TIF_NEED_RESCHED_LAZY 7 + + #define TIF_NOHZ 12 /* in adaptive nohz mode */ + #define TIF_USING_IWMMXT 17 +@@ -152,6 +154,7 @@ extern int vfp_restore_user_hwstate(struct user_vfp __user *, + #define _TIF_SIGPENDING (1 << TIF_SIGPENDING) + #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) + #define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME) ++#define _TIF_NEED_RESCHED_LAZY (1 << TIF_NEED_RESCHED_LAZY) + #define _TIF_UPROBE (1 << TIF_UPROBE) + #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) + #define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT) +@@ -167,7 +170,8 @@ extern int vfp_restore_user_hwstate(struct user_vfp __user *, + * Change these and you break ASM code in entry-common.S + */ + #define _TIF_WORK_MASK (_TIF_NEED_RESCHED | _TIF_SIGPENDING | \ +- _TIF_NOTIFY_RESUME | _TIF_UPROBE) ++ _TIF_NOTIFY_RESUME | _TIF_UPROBE | \ ++ _TIF_NEED_RESCHED_LAZY) + + #endif /* __KERNEL__ */ + #endif /* __ASM_ARM_THREAD_INFO_H */ +diff --git a/arch/arm/kernel/asm-offsets.c b/arch/arm/kernel/asm-offsets.c +index 608008229c7d..3866da3f7bb7 100644 +--- a/arch/arm/kernel/asm-offsets.c ++++ b/arch/arm/kernel/asm-offsets.c +@@ -65,6 +65,7 @@ int main(void) + BLANK(); + DEFINE(TI_FLAGS, offsetof(struct thread_info, flags)); + DEFINE(TI_PREEMPT, offsetof(struct thread_info, preempt_count)); ++ DEFINE(TI_PREEMPT_LAZY, offsetof(struct thread_info, preempt_lazy_count)); + DEFINE(TI_ADDR_LIMIT, offsetof(struct thread_info, addr_limit)); + DEFINE(TI_TASK, offsetof(struct thread_info, task)); + DEFINE(TI_CPU, offsetof(struct thread_info, cpu)); +diff --git a/arch/arm/kernel/entry-armv.S b/arch/arm/kernel/entry-armv.S +index 9f157e7c51e7..468e224d76aa 100644 +--- a/arch/arm/kernel/entry-armv.S ++++ b/arch/arm/kernel/entry-armv.S +@@ -220,11 +220,18 @@ ENDPROC(__dabt_svc) + + #ifdef CONFIG_PREEMPT + ldr r8, [tsk, #TI_PREEMPT] @ get preempt count +- ldr r0, [tsk, #TI_FLAGS] @ get flags + teq r8, #0 @ if preempt count != 0 ++ bne 1f @ return from exeption ++ ldr r0, [tsk, #TI_FLAGS] @ get flags ++ tst r0, #_TIF_NEED_RESCHED @ if NEED_RESCHED is set ++ blne svc_preempt @ preempt! ++ ++ ldr r8, [tsk, #TI_PREEMPT_LAZY] @ get preempt lazy count ++ teq r8, #0 @ if preempt lazy count != 0 + movne r0, #0 @ force flags to 0 +- tst r0, #_TIF_NEED_RESCHED ++ tst r0, #_TIF_NEED_RESCHED_LAZY + blne svc_preempt ++1: + #endif + + svc_exit r5, irq = 1 @ return from exception +@@ -239,8 +246,14 @@ ENDPROC(__irq_svc) + 1: bl preempt_schedule_irq @ irq en/disable is done inside + ldr r0, [tsk, #TI_FLAGS] @ get new tasks TI_FLAGS + tst r0, #_TIF_NEED_RESCHED ++ bne 1b ++ tst r0, #_TIF_NEED_RESCHED_LAZY + reteq r8 @ go again +- b 1b ++ ldr r0, [tsk, #TI_PREEMPT_LAZY] @ get preempt lazy count ++ teq r0, #0 @ if preempt lazy count != 0 ++ beq 1b ++ ret r8 @ go again ++ + #endif + + __und_fault: +diff --git a/arch/arm/kernel/entry-common.S b/arch/arm/kernel/entry-common.S +index 10c3283d6c19..8872937862cc 100644 +--- a/arch/arm/kernel/entry-common.S ++++ b/arch/arm/kernel/entry-common.S +@@ -36,7 +36,9 @@ + UNWIND(.cantunwind ) + disable_irq_notrace @ disable interrupts + ldr r1, [tsk, #TI_FLAGS] @ re-check for syscall tracing +- tst r1, #_TIF_SYSCALL_WORK | _TIF_WORK_MASK ++ tst r1, #((_TIF_SYSCALL_WORK | _TIF_WORK_MASK) & ~_TIF_SECCOMP) ++ bne fast_work_pending ++ tst r1, #_TIF_SECCOMP + bne fast_work_pending + + /* perform architecture specific actions before user return */ +@@ -62,8 +64,11 @@ ENDPROC(ret_fast_syscall) + str r0, [sp, #S_R0 + S_OFF]! @ save returned r0 + disable_irq_notrace @ disable interrupts + ldr r1, [tsk, #TI_FLAGS] @ re-check for syscall tracing +- tst r1, #_TIF_SYSCALL_WORK | _TIF_WORK_MASK ++ tst r1, #((_TIF_SYSCALL_WORK | _TIF_WORK_MASK) & ~_TIF_SECCOMP) ++ bne do_slower_path ++ tst r1, #_TIF_SECCOMP + beq no_work_pending ++do_slower_path: + UNWIND(.fnend ) + ENDPROC(ret_fast_syscall) + +diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c +index 612eb530f33f..cd3006dc1fd3 100644 +--- a/arch/arm/kernel/process.c ++++ b/arch/arm/kernel/process.c +@@ -323,6 +323,30 @@ unsigned long arch_randomize_brk(struct mm_struct *mm) + } + + #ifdef CONFIG_MMU ++/* ++ * CONFIG_SPLIT_PTLOCK_CPUS results in a page->ptl lock. If the lock is not ++ * initialized by pgtable_page_ctor() then a coredump of the vector page will ++ * fail. ++ */ ++static int __init vectors_user_mapping_init_page(void) ++{ ++ struct page *page; ++ unsigned long addr = 0xffff0000; ++ pgd_t *pgd; ++ pud_t *pud; ++ pmd_t *pmd; ++ ++ pgd = pgd_offset_k(addr); ++ pud = pud_offset(pgd, addr); ++ pmd = pmd_offset(pud, addr); ++ page = pmd_page(*(pmd)); ++ ++ pgtable_page_ctor(page); ++ ++ return 0; ++} ++late_initcall(vectors_user_mapping_init_page); ++ + #ifdef CONFIG_KUSER_HELPERS + /* + * The vectors page is always readable from user space for the +diff --git a/arch/arm/kernel/signal.c b/arch/arm/kernel/signal.c +index 7b8f2141427b..96541e00b74a 100644 +--- a/arch/arm/kernel/signal.c ++++ b/arch/arm/kernel/signal.c +@@ -572,7 +572,8 @@ do_work_pending(struct pt_regs *regs, unsigned int thread_flags, int syscall) + */ + trace_hardirqs_off(); + do { +- if (likely(thread_flags & _TIF_NEED_RESCHED)) { ++ if (likely(thread_flags & (_TIF_NEED_RESCHED | ++ _TIF_NEED_RESCHED_LAZY))) { + schedule(); + } else { + if (unlikely(!user_mode(regs))) +diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c +index 861521606c6d..e5ca865d321b 100644 +--- a/arch/arm/kernel/smp.c ++++ b/arch/arm/kernel/smp.c +@@ -234,8 +234,6 @@ int __cpu_disable(void) + flush_cache_louis(); + local_flush_tlb_all(); + +- clear_tasks_mm_cpumask(cpu); +- + return 0; + } + +@@ -251,6 +249,9 @@ void __cpu_die(unsigned int cpu) + pr_err("CPU%u: cpu didn't die\n", cpu); + return; + } ++ ++ clear_tasks_mm_cpumask(cpu); ++ + pr_notice("CPU%u: shutdown\n", cpu); + + /* +diff --git a/arch/arm/kernel/unwind.c b/arch/arm/kernel/unwind.c +index 0bee233fef9a..314cfb232a63 100644 +--- a/arch/arm/kernel/unwind.c ++++ b/arch/arm/kernel/unwind.c +@@ -93,7 +93,7 @@ extern const struct unwind_idx __start_unwind_idx[]; + static const struct unwind_idx *__origin_unwind_idx; + extern const struct unwind_idx __stop_unwind_idx[]; + +-static DEFINE_SPINLOCK(unwind_lock); ++static DEFINE_RAW_SPINLOCK(unwind_lock); + static LIST_HEAD(unwind_tables); + + /* Convert a prel31 symbol to an absolute address */ +@@ -201,7 +201,7 @@ static const struct unwind_idx *unwind_find_idx(unsigned long addr) + /* module unwind tables */ + struct unwind_table *table; + +- spin_lock_irqsave(&unwind_lock, flags); ++ raw_spin_lock_irqsave(&unwind_lock, flags); + list_for_each_entry(table, &unwind_tables, list) { + if (addr >= table->begin_addr && + addr < table->end_addr) { +@@ -213,7 +213,7 @@ static const struct unwind_idx *unwind_find_idx(unsigned long addr) + break; + } + } +- spin_unlock_irqrestore(&unwind_lock, flags); ++ raw_spin_unlock_irqrestore(&unwind_lock, flags); + } + + pr_debug("%s: idx = %p\n", __func__, idx); +@@ -529,9 +529,9 @@ struct unwind_table *unwind_table_add(unsigned long start, unsigned long size, + tab->begin_addr = text_addr; + tab->end_addr = text_addr + text_size; + +- spin_lock_irqsave(&unwind_lock, flags); ++ raw_spin_lock_irqsave(&unwind_lock, flags); + list_add_tail(&tab->list, &unwind_tables); +- spin_unlock_irqrestore(&unwind_lock, flags); ++ raw_spin_unlock_irqrestore(&unwind_lock, flags); + + return tab; + } +@@ -543,9 +543,9 @@ void unwind_table_del(struct unwind_table *tab) + if (!tab) + return; + +- spin_lock_irqsave(&unwind_lock, flags); ++ raw_spin_lock_irqsave(&unwind_lock, flags); + list_del(&tab->list); +- spin_unlock_irqrestore(&unwind_lock, flags); ++ raw_spin_unlock_irqrestore(&unwind_lock, flags); + + kfree(tab); + } +diff --git a/arch/arm/kvm/arm.c b/arch/arm/kvm/arm.c +index c94b90d43772..244dde72018a 100644 +--- a/arch/arm/kvm/arm.c ++++ b/arch/arm/kvm/arm.c +@@ -584,7 +584,7 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run) + * involves poking the GIC, which must be done in a + * non-preemptible context. + */ +- preempt_disable(); ++ migrate_disable(); + kvm_pmu_flush_hwstate(vcpu); + kvm_timer_flush_hwstate(vcpu); + kvm_vgic_flush_hwstate(vcpu); +@@ -605,7 +605,7 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run) + kvm_pmu_sync_hwstate(vcpu); + kvm_timer_sync_hwstate(vcpu); + kvm_vgic_sync_hwstate(vcpu); +- preempt_enable(); ++ migrate_enable(); + continue; + } + +@@ -661,7 +661,7 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run) + + kvm_vgic_sync_hwstate(vcpu); + +- preempt_enable(); ++ migrate_enable(); + + ret = handle_exit(vcpu, run, ret); + } +diff --git a/arch/arm/mach-exynos/platsmp.c b/arch/arm/mach-exynos/platsmp.c +index 98ffe1e62ad5..df9769ddece5 100644 +--- a/arch/arm/mach-exynos/platsmp.c ++++ b/arch/arm/mach-exynos/platsmp.c +@@ -229,7 +229,7 @@ static void __iomem *scu_base_addr(void) + return (void __iomem *)(S5P_VA_SCU); + } + +-static DEFINE_SPINLOCK(boot_lock); ++static DEFINE_RAW_SPINLOCK(boot_lock); + + static void exynos_secondary_init(unsigned int cpu) + { +@@ -242,8 +242,8 @@ static void exynos_secondary_init(unsigned int cpu) + /* + * Synchronise with the boot thread. + */ +- spin_lock(&boot_lock); +- spin_unlock(&boot_lock); ++ raw_spin_lock(&boot_lock); ++ raw_spin_unlock(&boot_lock); + } + + int exynos_set_boot_addr(u32 core_id, unsigned long boot_addr) +@@ -307,7 +307,7 @@ static int exynos_boot_secondary(unsigned int cpu, struct task_struct *idle) + * Set synchronisation state between this boot processor + * and the secondary one + */ +- spin_lock(&boot_lock); ++ raw_spin_lock(&boot_lock); + + /* + * The secondary processor is waiting to be released from +@@ -334,7 +334,7 @@ static int exynos_boot_secondary(unsigned int cpu, struct task_struct *idle) + + if (timeout == 0) { + printk(KERN_ERR "cpu1 power enable failed"); +- spin_unlock(&boot_lock); ++ raw_spin_unlock(&boot_lock); + return -ETIMEDOUT; + } + } +@@ -380,7 +380,7 @@ static int exynos_boot_secondary(unsigned int cpu, struct task_struct *idle) + * calibrations, then wait for it to finish + */ + fail: +- spin_unlock(&boot_lock); ++ raw_spin_unlock(&boot_lock); + + return pen_release != -1 ? ret : 0; + } +diff --git a/arch/arm/mach-hisi/platmcpm.c b/arch/arm/mach-hisi/platmcpm.c +index 4b653a8cb75c..b03d5a922cb1 100644 +--- a/arch/arm/mach-hisi/platmcpm.c ++++ b/arch/arm/mach-hisi/platmcpm.c +@@ -61,7 +61,7 @@ + + static void __iomem *sysctrl, *fabric; + static int hip04_cpu_table[HIP04_MAX_CLUSTERS][HIP04_MAX_CPUS_PER_CLUSTER]; +-static DEFINE_SPINLOCK(boot_lock); ++static DEFINE_RAW_SPINLOCK(boot_lock); + static u32 fabric_phys_addr; + /* + * [0]: bootwrapper physical address +@@ -113,7 +113,7 @@ static int hip04_boot_secondary(unsigned int l_cpu, struct task_struct *idle) + if (cluster >= HIP04_MAX_CLUSTERS || cpu >= HIP04_MAX_CPUS_PER_CLUSTER) + return -EINVAL; + +- spin_lock_irq(&boot_lock); ++ raw_spin_lock_irq(&boot_lock); + + if (hip04_cpu_table[cluster][cpu]) + goto out; +@@ -147,7 +147,7 @@ static int hip04_boot_secondary(unsigned int l_cpu, struct task_struct *idle) + + out: + hip04_cpu_table[cluster][cpu]++; +- spin_unlock_irq(&boot_lock); ++ raw_spin_unlock_irq(&boot_lock); + + return 0; + } +@@ -162,11 +162,11 @@ static void hip04_cpu_die(unsigned int l_cpu) + cpu = MPIDR_AFFINITY_LEVEL(mpidr, 0); + cluster = MPIDR_AFFINITY_LEVEL(mpidr, 1); + +- spin_lock(&boot_lock); ++ raw_spin_lock(&boot_lock); + hip04_cpu_table[cluster][cpu]--; + if (hip04_cpu_table[cluster][cpu] == 1) { + /* A power_up request went ahead of us. */ +- spin_unlock(&boot_lock); ++ raw_spin_unlock(&boot_lock); + return; + } else if (hip04_cpu_table[cluster][cpu] > 1) { + pr_err("Cluster %d CPU%d boots multiple times\n", cluster, cpu); +@@ -174,7 +174,7 @@ static void hip04_cpu_die(unsigned int l_cpu) + } + + last_man = hip04_cluster_is_down(cluster); +- spin_unlock(&boot_lock); ++ raw_spin_unlock(&boot_lock); + if (last_man) { + /* Since it's Cortex A15, disable L2 prefetching. */ + asm volatile( +@@ -203,7 +203,7 @@ static int hip04_cpu_kill(unsigned int l_cpu) + cpu >= HIP04_MAX_CPUS_PER_CLUSTER); + + count = TIMEOUT_MSEC / POLL_MSEC; +- spin_lock_irq(&boot_lock); ++ raw_spin_lock_irq(&boot_lock); + for (tries = 0; tries < count; tries++) { + if (hip04_cpu_table[cluster][cpu]) + goto err; +@@ -211,10 +211,10 @@ static int hip04_cpu_kill(unsigned int l_cpu) + data = readl_relaxed(sysctrl + SC_CPU_RESET_STATUS(cluster)); + if (data & CORE_WFI_STATUS(cpu)) + break; +- spin_unlock_irq(&boot_lock); ++ raw_spin_unlock_irq(&boot_lock); + /* Wait for clean L2 when the whole cluster is down. */ + msleep(POLL_MSEC); +- spin_lock_irq(&boot_lock); ++ raw_spin_lock_irq(&boot_lock); + } + if (tries >= count) + goto err; +@@ -231,10 +231,10 @@ static int hip04_cpu_kill(unsigned int l_cpu) + goto err; + if (hip04_cluster_is_down(cluster)) + hip04_set_snoop_filter(cluster, 0); +- spin_unlock_irq(&boot_lock); ++ raw_spin_unlock_irq(&boot_lock); + return 1; + err: +- spin_unlock_irq(&boot_lock); ++ raw_spin_unlock_irq(&boot_lock); + return 0; + } + #endif +diff --git a/arch/arm/mach-omap2/omap-smp.c b/arch/arm/mach-omap2/omap-smp.c +index b4de3da6dffa..b52893319d75 100644 +--- a/arch/arm/mach-omap2/omap-smp.c ++++ b/arch/arm/mach-omap2/omap-smp.c +@@ -64,7 +64,7 @@ static const struct omap_smp_config omap5_cfg __initconst = { + .startup_addr = omap5_secondary_startup, + }; + +-static DEFINE_SPINLOCK(boot_lock); ++static DEFINE_RAW_SPINLOCK(boot_lock); + + void __iomem *omap4_get_scu_base(void) + { +@@ -131,8 +131,8 @@ static void omap4_secondary_init(unsigned int cpu) + /* + * Synchronise with the boot thread. + */ +- spin_lock(&boot_lock); +- spin_unlock(&boot_lock); ++ raw_spin_lock(&boot_lock); ++ raw_spin_unlock(&boot_lock); + } + + static int omap4_boot_secondary(unsigned int cpu, struct task_struct *idle) +@@ -146,7 +146,7 @@ static int omap4_boot_secondary(unsigned int cpu, struct task_struct *idle) + * Set synchronisation state between this boot processor + * and the secondary one + */ +- spin_lock(&boot_lock); ++ raw_spin_lock(&boot_lock); + + /* + * Update the AuxCoreBoot0 with boot state for secondary core. +@@ -223,7 +223,7 @@ static int omap4_boot_secondary(unsigned int cpu, struct task_struct *idle) + * Now the secondary core is starting up let it run its + * calibrations, then wait for it to finish + */ +- spin_unlock(&boot_lock); ++ raw_spin_unlock(&boot_lock); + + return 0; + } +diff --git a/arch/arm/mach-prima2/platsmp.c b/arch/arm/mach-prima2/platsmp.c +index 0875b99add18..18b6d98d2581 100644 +--- a/arch/arm/mach-prima2/platsmp.c ++++ b/arch/arm/mach-prima2/platsmp.c +@@ -22,7 +22,7 @@ + + static void __iomem *clk_base; + +-static DEFINE_SPINLOCK(boot_lock); ++static DEFINE_RAW_SPINLOCK(boot_lock); + + static void sirfsoc_secondary_init(unsigned int cpu) + { +@@ -36,8 +36,8 @@ static void sirfsoc_secondary_init(unsigned int cpu) + /* + * Synchronise with the boot thread. + */ +- spin_lock(&boot_lock); +- spin_unlock(&boot_lock); ++ raw_spin_lock(&boot_lock); ++ raw_spin_unlock(&boot_lock); + } + + static const struct of_device_id clk_ids[] = { +@@ -75,7 +75,7 @@ static int sirfsoc_boot_secondary(unsigned int cpu, struct task_struct *idle) + /* make sure write buffer is drained */ + mb(); + +- spin_lock(&boot_lock); ++ raw_spin_lock(&boot_lock); + + /* + * The secondary processor is waiting to be released from +@@ -107,7 +107,7 @@ static int sirfsoc_boot_secondary(unsigned int cpu, struct task_struct *idle) + * now the secondary core is starting up let it run its + * calibrations, then wait for it to finish + */ +- spin_unlock(&boot_lock); ++ raw_spin_unlock(&boot_lock); + + return pen_release != -1 ? -ENOSYS : 0; + } +diff --git a/arch/arm/mach-qcom/platsmp.c b/arch/arm/mach-qcom/platsmp.c +index 5494c9e0c909..e8ce157d3548 100644 +--- a/arch/arm/mach-qcom/platsmp.c ++++ b/arch/arm/mach-qcom/platsmp.c +@@ -46,7 +46,7 @@ + + extern void secondary_startup_arm(void); + +-static DEFINE_SPINLOCK(boot_lock); ++static DEFINE_RAW_SPINLOCK(boot_lock); + + #ifdef CONFIG_HOTPLUG_CPU + static void qcom_cpu_die(unsigned int cpu) +@@ -60,8 +60,8 @@ static void qcom_secondary_init(unsigned int cpu) + /* + * Synchronise with the boot thread. + */ +- spin_lock(&boot_lock); +- spin_unlock(&boot_lock); ++ raw_spin_lock(&boot_lock); ++ raw_spin_unlock(&boot_lock); + } + + static int scss_release_secondary(unsigned int cpu) +@@ -284,7 +284,7 @@ static int qcom_boot_secondary(unsigned int cpu, int (*func)(unsigned int)) + * set synchronisation state between this boot processor + * and the secondary one + */ +- spin_lock(&boot_lock); ++ raw_spin_lock(&boot_lock); + + /* + * Send the secondary CPU a soft interrupt, thereby causing +@@ -297,7 +297,7 @@ static int qcom_boot_secondary(unsigned int cpu, int (*func)(unsigned int)) + * now the secondary core is starting up let it run its + * calibrations, then wait for it to finish + */ +- spin_unlock(&boot_lock); ++ raw_spin_unlock(&boot_lock); + + return ret; + } +diff --git a/arch/arm/mach-spear/platsmp.c b/arch/arm/mach-spear/platsmp.c +index 8d1e2d551786..7fa56cc78118 100644 +--- a/arch/arm/mach-spear/platsmp.c ++++ b/arch/arm/mach-spear/platsmp.c +@@ -32,7 +32,7 @@ static void write_pen_release(int val) + sync_cache_w(&pen_release); + } + +-static DEFINE_SPINLOCK(boot_lock); ++static DEFINE_RAW_SPINLOCK(boot_lock); + + static void __iomem *scu_base = IOMEM(VA_SCU_BASE); + +@@ -47,8 +47,8 @@ static void spear13xx_secondary_init(unsigned int cpu) + /* + * Synchronise with the boot thread. + */ +- spin_lock(&boot_lock); +- spin_unlock(&boot_lock); ++ raw_spin_lock(&boot_lock); ++ raw_spin_unlock(&boot_lock); + } + + static int spear13xx_boot_secondary(unsigned int cpu, struct task_struct *idle) +@@ -59,7 +59,7 @@ static int spear13xx_boot_secondary(unsigned int cpu, struct task_struct *idle) + * set synchronisation state between this boot processor + * and the secondary one + */ +- spin_lock(&boot_lock); ++ raw_spin_lock(&boot_lock); + + /* + * The secondary processor is waiting to be released from +@@ -84,7 +84,7 @@ static int spear13xx_boot_secondary(unsigned int cpu, struct task_struct *idle) + * now the secondary core is starting up let it run its + * calibrations, then wait for it to finish + */ +- spin_unlock(&boot_lock); ++ raw_spin_unlock(&boot_lock); + + return pen_release != -1 ? -ENOSYS : 0; + } +diff --git a/arch/arm/mach-sti/platsmp.c b/arch/arm/mach-sti/platsmp.c +index ea5a2277ee46..b988e081ac79 100644 +--- a/arch/arm/mach-sti/platsmp.c ++++ b/arch/arm/mach-sti/platsmp.c +@@ -35,7 +35,7 @@ static void write_pen_release(int val) + sync_cache_w(&pen_release); + } + +-static DEFINE_SPINLOCK(boot_lock); ++static DEFINE_RAW_SPINLOCK(boot_lock); + + static void sti_secondary_init(unsigned int cpu) + { +@@ -48,8 +48,8 @@ static void sti_secondary_init(unsigned int cpu) + /* + * Synchronise with the boot thread. + */ +- spin_lock(&boot_lock); +- spin_unlock(&boot_lock); ++ raw_spin_lock(&boot_lock); ++ raw_spin_unlock(&boot_lock); + } + + static int sti_boot_secondary(unsigned int cpu, struct task_struct *idle) +@@ -60,7 +60,7 @@ static int sti_boot_secondary(unsigned int cpu, struct task_struct *idle) + * set synchronisation state between this boot processor + * and the secondary one + */ +- spin_lock(&boot_lock); ++ raw_spin_lock(&boot_lock); + + /* + * The secondary processor is waiting to be released from +@@ -91,7 +91,7 @@ static int sti_boot_secondary(unsigned int cpu, struct task_struct *idle) + * now the secondary core is starting up let it run its + * calibrations, then wait for it to finish + */ +- spin_unlock(&boot_lock); ++ raw_spin_unlock(&boot_lock); + + return pen_release != -1 ? -ENOSYS : 0; + } +diff --git a/arch/arm/mm/fault.c b/arch/arm/mm/fault.c +index 3a2e678b8d30..3ed1e9ba6a01 100644 +--- a/arch/arm/mm/fault.c ++++ b/arch/arm/mm/fault.c +@@ -430,6 +430,9 @@ do_translation_fault(unsigned long addr, unsigned int fsr, + if (addr < TASK_SIZE) + return do_page_fault(addr, fsr, regs); + ++ if (interrupts_enabled(regs)) ++ local_irq_enable(); ++ + if (user_mode(regs)) + goto bad_area; + +@@ -497,6 +500,9 @@ do_translation_fault(unsigned long addr, unsigned int fsr, + static int + do_sect_fault(unsigned long addr, unsigned int fsr, struct pt_regs *regs) + { ++ if (interrupts_enabled(regs)) ++ local_irq_enable(); ++ + do_bad_area(addr, fsr, regs); + return 0; + } +diff --git a/arch/arm/mm/highmem.c b/arch/arm/mm/highmem.c +index d02f8187b1cc..542692dbd40a 100644 +--- a/arch/arm/mm/highmem.c ++++ b/arch/arm/mm/highmem.c +@@ -34,6 +34,11 @@ static inline pte_t get_fixmap_pte(unsigned long vaddr) + return *ptep; + } + ++static unsigned int fixmap_idx(int type) ++{ ++ return FIX_KMAP_BEGIN + type + KM_TYPE_NR * smp_processor_id(); ++} ++ + void *kmap(struct page *page) + { + might_sleep(); +@@ -54,12 +59,13 @@ EXPORT_SYMBOL(kunmap); + + void *kmap_atomic(struct page *page) + { ++ pte_t pte = mk_pte(page, kmap_prot); + unsigned int idx; + unsigned long vaddr; + void *kmap; + int type; + +- preempt_disable(); ++ preempt_disable_nort(); + pagefault_disable(); + if (!PageHighMem(page)) + return page_address(page); +@@ -79,7 +85,7 @@ void *kmap_atomic(struct page *page) + + type = kmap_atomic_idx_push(); + +- idx = FIX_KMAP_BEGIN + type + KM_TYPE_NR * smp_processor_id(); ++ idx = fixmap_idx(type); + vaddr = __fix_to_virt(idx); + #ifdef CONFIG_DEBUG_HIGHMEM + /* +@@ -93,7 +99,10 @@ void *kmap_atomic(struct page *page) + * in place, so the contained TLB flush ensures the TLB is updated + * with the new mapping. + */ +- set_fixmap_pte(idx, mk_pte(page, kmap_prot)); ++#ifdef CONFIG_PREEMPT_RT_FULL ++ current->kmap_pte[type] = pte; ++#endif ++ set_fixmap_pte(idx, pte); + + return (void *)vaddr; + } +@@ -106,44 +115,75 @@ void __kunmap_atomic(void *kvaddr) + + if (kvaddr >= (void *)FIXADDR_START) { + type = kmap_atomic_idx(); +- idx = FIX_KMAP_BEGIN + type + KM_TYPE_NR * smp_processor_id(); ++ idx = fixmap_idx(type); + + if (cache_is_vivt()) + __cpuc_flush_dcache_area((void *)vaddr, PAGE_SIZE); ++#ifdef CONFIG_PREEMPT_RT_FULL ++ current->kmap_pte[type] = __pte(0); ++#endif + #ifdef CONFIG_DEBUG_HIGHMEM + BUG_ON(vaddr != __fix_to_virt(idx)); +- set_fixmap_pte(idx, __pte(0)); + #else + (void) idx; /* to kill a warning */ + #endif ++ set_fixmap_pte(idx, __pte(0)); + kmap_atomic_idx_pop(); + } else if (vaddr >= PKMAP_ADDR(0) && vaddr < PKMAP_ADDR(LAST_PKMAP)) { + /* this address was obtained through kmap_high_get() */ + kunmap_high(pte_page(pkmap_page_table[PKMAP_NR(vaddr)])); + } + pagefault_enable(); +- preempt_enable(); ++ preempt_enable_nort(); + } + EXPORT_SYMBOL(__kunmap_atomic); + + void *kmap_atomic_pfn(unsigned long pfn) + { ++ pte_t pte = pfn_pte(pfn, kmap_prot); + unsigned long vaddr; + int idx, type; + struct page *page = pfn_to_page(pfn); + +- preempt_disable(); ++ preempt_disable_nort(); + pagefault_disable(); + if (!PageHighMem(page)) + return page_address(page); + + type = kmap_atomic_idx_push(); +- idx = FIX_KMAP_BEGIN + type + KM_TYPE_NR * smp_processor_id(); ++ idx = fixmap_idx(type); + vaddr = __fix_to_virt(idx); + #ifdef CONFIG_DEBUG_HIGHMEM + BUG_ON(!pte_none(get_fixmap_pte(vaddr))); + #endif +- set_fixmap_pte(idx, pfn_pte(pfn, kmap_prot)); ++#ifdef CONFIG_PREEMPT_RT_FULL ++ current->kmap_pte[type] = pte; ++#endif ++ set_fixmap_pte(idx, pte); + + return (void *)vaddr; + } ++#if defined CONFIG_PREEMPT_RT_FULL ++void switch_kmaps(struct task_struct *prev_p, struct task_struct *next_p) ++{ ++ int i; ++ ++ /* ++ * Clear @prev's kmap_atomic mappings ++ */ ++ for (i = 0; i < prev_p->kmap_idx; i++) { ++ int idx = fixmap_idx(i); ++ ++ set_fixmap_pte(idx, __pte(0)); ++ } ++ /* ++ * Restore @next_p's kmap_atomic mappings ++ */ ++ for (i = 0; i < next_p->kmap_idx; i++) { ++ int idx = fixmap_idx(i); ++ ++ if (!pte_none(next_p->kmap_pte[i])) ++ set_fixmap_pte(idx, next_p->kmap_pte[i]); ++ } ++} ++#endif +diff --git a/arch/arm/plat-versatile/platsmp.c b/arch/arm/plat-versatile/platsmp.c +index c2366510187a..6b60f582b738 100644 +--- a/arch/arm/plat-versatile/platsmp.c ++++ b/arch/arm/plat-versatile/platsmp.c +@@ -32,7 +32,7 @@ static void write_pen_release(int val) + sync_cache_w(&pen_release); + } + +-static DEFINE_SPINLOCK(boot_lock); ++static DEFINE_RAW_SPINLOCK(boot_lock); + + void versatile_secondary_init(unsigned int cpu) + { +@@ -45,8 +45,8 @@ void versatile_secondary_init(unsigned int cpu) + /* + * Synchronise with the boot thread. + */ +- spin_lock(&boot_lock); +- spin_unlock(&boot_lock); ++ raw_spin_lock(&boot_lock); ++ raw_spin_unlock(&boot_lock); + } + + int versatile_boot_secondary(unsigned int cpu, struct task_struct *idle) +@@ -57,7 +57,7 @@ int versatile_boot_secondary(unsigned int cpu, struct task_struct *idle) + * Set synchronisation state between this boot processor + * and the secondary one + */ +- spin_lock(&boot_lock); ++ raw_spin_lock(&boot_lock); + + /* + * This is really belt and braces; we hold unintended secondary +@@ -87,7 +87,7 @@ int versatile_boot_secondary(unsigned int cpu, struct task_struct *idle) + * now the secondary core is starting up let it run its + * calibrations, then wait for it to finish + */ +- spin_unlock(&boot_lock); ++ raw_spin_unlock(&boot_lock); + + return pen_release != -1 ? -ENOSYS : 0; + } +diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig +index bc3f00f586f1..0f3df6d5154a 100644 +--- a/arch/arm64/Kconfig ++++ b/arch/arm64/Kconfig +@@ -90,6 +90,7 @@ config ARM64 + select HAVE_PERF_EVENTS + select HAVE_PERF_REGS + select HAVE_PERF_USER_STACK_DUMP ++ select HAVE_PREEMPT_LAZY + select HAVE_REGS_AND_STACK_ACCESS_API + select HAVE_RCU_TABLE_FREE + select HAVE_SYSCALL_TRACEPOINTS +@@ -689,7 +690,7 @@ config XEN_DOM0 + + config XEN + bool "Xen guest support on ARM64" +- depends on ARM64 && OF ++ depends on ARM64 && OF && !PREEMPT_RT_FULL + select SWIOTLB_XEN + select PARAVIRT + help +diff --git a/arch/arm64/include/asm/thread_info.h b/arch/arm64/include/asm/thread_info.h +index abd64bd1f6d9..9170788ffa37 100644 +--- a/arch/arm64/include/asm/thread_info.h ++++ b/arch/arm64/include/asm/thread_info.h +@@ -49,6 +49,7 @@ struct thread_info { + mm_segment_t addr_limit; /* address limit */ + struct task_struct *task; /* main task structure */ + int preempt_count; /* 0 => preemptable, <0 => bug */ ++ int preempt_lazy_count; /* 0 => preemptable, <0 => bug */ + int cpu; /* cpu */ + }; + +@@ -109,6 +110,7 @@ static inline struct thread_info *current_thread_info(void) + #define TIF_NEED_RESCHED 1 + #define TIF_NOTIFY_RESUME 2 /* callback before returning to user */ + #define TIF_FOREIGN_FPSTATE 3 /* CPU's FP state is not current's */ ++#define TIF_NEED_RESCHED_LAZY 4 + #define TIF_NOHZ 7 + #define TIF_SYSCALL_TRACE 8 + #define TIF_SYSCALL_AUDIT 9 +@@ -124,6 +126,7 @@ static inline struct thread_info *current_thread_info(void) + #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) + #define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME) + #define _TIF_FOREIGN_FPSTATE (1 << TIF_FOREIGN_FPSTATE) ++#define _TIF_NEED_RESCHED_LAZY (1 << TIF_NEED_RESCHED_LAZY) + #define _TIF_NOHZ (1 << TIF_NOHZ) + #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) + #define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT) +@@ -132,7 +135,8 @@ static inline struct thread_info *current_thread_info(void) + #define _TIF_32BIT (1 << TIF_32BIT) + + #define _TIF_WORK_MASK (_TIF_NEED_RESCHED | _TIF_SIGPENDING | \ +- _TIF_NOTIFY_RESUME | _TIF_FOREIGN_FPSTATE) ++ _TIF_NOTIFY_RESUME | _TIF_FOREIGN_FPSTATE | \ ++ _TIF_NEED_RESCHED_LAZY) + + #define _TIF_SYSCALL_WORK (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | \ + _TIF_SYSCALL_TRACEPOINT | _TIF_SECCOMP | \ +diff --git a/arch/arm64/kernel/asm-offsets.c b/arch/arm64/kernel/asm-offsets.c +index 05070b72fc28..acfeddb1283a 100644 +--- a/arch/arm64/kernel/asm-offsets.c ++++ b/arch/arm64/kernel/asm-offsets.c +@@ -37,6 +37,7 @@ int main(void) + BLANK(); + DEFINE(TI_FLAGS, offsetof(struct thread_info, flags)); + DEFINE(TI_PREEMPT, offsetof(struct thread_info, preempt_count)); ++ DEFINE(TI_PREEMPT_LAZY, offsetof(struct thread_info, preempt_lazy_count)); + DEFINE(TI_ADDR_LIMIT, offsetof(struct thread_info, addr_limit)); + DEFINE(TI_TASK, offsetof(struct thread_info, task)); + DEFINE(TI_CPU, offsetof(struct thread_info, cpu)); +diff --git a/arch/arm64/kernel/entry.S b/arch/arm64/kernel/entry.S +index 441420ca7d08..404792bdca99 100644 +--- a/arch/arm64/kernel/entry.S ++++ b/arch/arm64/kernel/entry.S +@@ -434,11 +434,16 @@ ENDPROC(el1_sync) + + #ifdef CONFIG_PREEMPT + ldr w24, [tsk, #TI_PREEMPT] // get preempt count +- cbnz w24, 1f // preempt count != 0 ++ cbnz w24, 2f // preempt count != 0 + ldr x0, [tsk, #TI_FLAGS] // get flags +- tbz x0, #TIF_NEED_RESCHED, 1f // needs rescheduling? +- bl el1_preempt ++ tbnz x0, #TIF_NEED_RESCHED, 1f // needs rescheduling? ++ ++ ldr w24, [tsk, #TI_PREEMPT_LAZY] // get preempt lazy count ++ cbnz w24, 2f // preempt lazy count != 0 ++ tbz x0, #TIF_NEED_RESCHED_LAZY, 2f // needs rescheduling? + 1: ++ bl el1_preempt ++2: + #endif + #ifdef CONFIG_TRACE_IRQFLAGS + bl trace_hardirqs_on +@@ -452,6 +457,7 @@ ENDPROC(el1_irq) + 1: bl preempt_schedule_irq // irq en/disable is done inside + ldr x0, [tsk, #TI_FLAGS] // get new tasks TI_FLAGS + tbnz x0, #TIF_NEED_RESCHED, 1b // needs rescheduling? ++ tbnz x0, #TIF_NEED_RESCHED_LAZY, 1b // needs rescheduling? + ret x24 + #endif + +@@ -708,6 +714,7 @@ ENDPROC(cpu_switch_to) + */ + work_pending: + tbnz x1, #TIF_NEED_RESCHED, work_resched ++ tbnz x1, #TIF_NEED_RESCHED_LAZY, work_resched + /* TIF_SIGPENDING, TIF_NOTIFY_RESUME or TIF_FOREIGN_FPSTATE case */ + mov x0, sp // 'regs' + enable_irq // enable interrupts for do_notify_resume() +diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig +index 212ff92920d2..71ad38d3d76b 100644 +--- a/arch/mips/Kconfig ++++ b/arch/mips/Kconfig +@@ -2480,7 +2480,7 @@ config MIPS_ASID_BITS_VARIABLE + # + config HIGHMEM + bool "High Memory Support" +- depends on 32BIT && CPU_SUPPORTS_HIGHMEM && SYS_SUPPORTS_HIGHMEM && !CPU_MIPS32_3_5_EVA ++ depends on 32BIT && CPU_SUPPORTS_HIGHMEM && SYS_SUPPORTS_HIGHMEM && !CPU_MIPS32_3_5_EVA && !PREEMPT_RT_FULL + + config CPU_SUPPORTS_HIGHMEM + bool +diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig +index 792cb1768c8f..ddf5a0fdb25a 100644 +--- a/arch/powerpc/Kconfig ++++ b/arch/powerpc/Kconfig +@@ -57,10 +57,11 @@ config LOCKDEP_SUPPORT + + config RWSEM_GENERIC_SPINLOCK + bool ++ default y if PREEMPT_RT_FULL + + config RWSEM_XCHGADD_ALGORITHM + bool +- default y ++ default y if !PREEMPT_RT_FULL + + config GENERIC_LOCKBREAK + bool +@@ -140,6 +141,7 @@ config PPC + select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST + select GENERIC_STRNCPY_FROM_USER + select GENERIC_STRNLEN_USER ++ select HAVE_PREEMPT_LAZY + select HAVE_MOD_ARCH_SPECIFIC + select MODULES_USE_ELF_RELA + select CLONE_BACKWARDS +@@ -326,7 +328,7 @@ menu "Kernel options" + + config HIGHMEM + bool "High memory support" +- depends on PPC32 ++ depends on PPC32 && !PREEMPT_RT_FULL + + source kernel/Kconfig.hz + source kernel/Kconfig.preempt +diff --git a/arch/powerpc/include/asm/thread_info.h b/arch/powerpc/include/asm/thread_info.h +index 87e4b2d8dcd4..981e501a4359 100644 +--- a/arch/powerpc/include/asm/thread_info.h ++++ b/arch/powerpc/include/asm/thread_info.h +@@ -43,6 +43,8 @@ struct thread_info { + int cpu; /* cpu we're on */ + int preempt_count; /* 0 => preemptable, + <0 => BUG */ ++ int preempt_lazy_count; /* 0 => preemptable, ++ <0 => BUG */ + unsigned long local_flags; /* private flags for thread */ + #ifdef CONFIG_LIVEPATCH + unsigned long *livepatch_sp; +@@ -88,8 +90,7 @@ static inline struct thread_info *current_thread_info(void) + #define TIF_SYSCALL_TRACE 0 /* syscall trace active */ + #define TIF_SIGPENDING 1 /* signal pending */ + #define TIF_NEED_RESCHED 2 /* rescheduling necessary */ +-#define TIF_POLLING_NRFLAG 3 /* true if poll_idle() is polling +- TIF_NEED_RESCHED */ ++#define TIF_NEED_RESCHED_LAZY 3 /* lazy rescheduling necessary */ + #define TIF_32BIT 4 /* 32 bit binary */ + #define TIF_RESTORE_TM 5 /* need to restore TM FP/VEC/VSX */ + #define TIF_SYSCALL_AUDIT 7 /* syscall auditing active */ +@@ -107,6 +108,8 @@ static inline struct thread_info *current_thread_info(void) + #if defined(CONFIG_PPC64) + #define TIF_ELF2ABI 18 /* function descriptors must die! */ + #endif ++#define TIF_POLLING_NRFLAG 19 /* true if poll_idle() is polling ++ TIF_NEED_RESCHED */ + + /* as above, but as bit values */ + #define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE) +@@ -125,14 +128,16 @@ static inline struct thread_info *current_thread_info(void) + #define _TIF_SYSCALL_TRACEPOINT (1<<TIF_SYSCALL_TRACEPOINT) + #define _TIF_EMULATE_STACK_STORE (1<<TIF_EMULATE_STACK_STORE) + #define _TIF_NOHZ (1<<TIF_NOHZ) ++#define _TIF_NEED_RESCHED_LAZY (1<<TIF_NEED_RESCHED_LAZY) + #define _TIF_SYSCALL_DOTRACE (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | \ + _TIF_SECCOMP | _TIF_SYSCALL_TRACEPOINT | \ + _TIF_NOHZ) + + #define _TIF_USER_WORK_MASK (_TIF_SIGPENDING | _TIF_NEED_RESCHED | \ + _TIF_NOTIFY_RESUME | _TIF_UPROBE | \ +- _TIF_RESTORE_TM) ++ _TIF_RESTORE_TM | _TIF_NEED_RESCHED_LAZY) + #define _TIF_PERSYSCALL_MASK (_TIF_RESTOREALL|_TIF_NOERROR) ++#define _TIF_NEED_RESCHED_MASK (_TIF_NEED_RESCHED | _TIF_NEED_RESCHED_LAZY) + + /* Bits in local_flags */ + /* Don't move TLF_NAPPING without adjusting the code in entry_32.S */ +diff --git a/arch/powerpc/kernel/asm-offsets.c b/arch/powerpc/kernel/asm-offsets.c +index b89d14c0352c..81ae8f4c88f6 100644 +--- a/arch/powerpc/kernel/asm-offsets.c ++++ b/arch/powerpc/kernel/asm-offsets.c +@@ -156,6 +156,7 @@ int main(void) + DEFINE(TI_FLAGS, offsetof(struct thread_info, flags)); + DEFINE(TI_LOCAL_FLAGS, offsetof(struct thread_info, local_flags)); + DEFINE(TI_PREEMPT, offsetof(struct thread_info, preempt_count)); ++ DEFINE(TI_PREEMPT_LAZY, offsetof(struct thread_info, preempt_lazy_count)); + DEFINE(TI_TASK, offsetof(struct thread_info, task)); + DEFINE(TI_CPU, offsetof(struct thread_info, cpu)); + +diff --git a/arch/powerpc/kernel/entry_32.S b/arch/powerpc/kernel/entry_32.S +index 9899032230b4..f95b93f46c47 100644 +--- a/arch/powerpc/kernel/entry_32.S ++++ b/arch/powerpc/kernel/entry_32.S +@@ -835,7 +835,14 @@ user_exc_return: /* r10 contains MSR_KERNEL here */ + cmpwi 0,r0,0 /* if non-zero, just restore regs and return */ + bne restore + andi. r8,r8,_TIF_NEED_RESCHED ++ bne+ 1f ++ lwz r0,TI_PREEMPT_LAZY(r9) ++ cmpwi 0,r0,0 /* if non-zero, just restore regs and return */ ++ bne restore ++ lwz r0,TI_FLAGS(r9) ++ andi. r0,r0,_TIF_NEED_RESCHED_LAZY + beq+ restore ++1: + lwz r3,_MSR(r1) + andi. r0,r3,MSR_EE /* interrupts off? */ + beq restore /* don't schedule if so */ +@@ -846,11 +853,11 @@ user_exc_return: /* r10 contains MSR_KERNEL here */ + */ + bl trace_hardirqs_off + #endif +-1: bl preempt_schedule_irq ++2: bl preempt_schedule_irq + CURRENT_THREAD_INFO(r9, r1) + lwz r3,TI_FLAGS(r9) +- andi. r0,r3,_TIF_NEED_RESCHED +- bne- 1b ++ andi. r0,r3,_TIF_NEED_RESCHED_MASK ++ bne- 2b + #ifdef CONFIG_TRACE_IRQFLAGS + /* And now, to properly rebalance the above, we tell lockdep they + * are being turned back on, which will happen when we return +@@ -1171,7 +1178,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_NEED_PAIRED_STWCX) + #endif /* !(CONFIG_4xx || CONFIG_BOOKE) */ + + do_work: /* r10 contains MSR_KERNEL here */ +- andi. r0,r9,_TIF_NEED_RESCHED ++ andi. r0,r9,_TIF_NEED_RESCHED_MASK + beq do_user_signal + + do_resched: /* r10 contains MSR_KERNEL here */ +@@ -1192,7 +1199,7 @@ do_resched: /* r10 contains MSR_KERNEL here */ + MTMSRD(r10) /* disable interrupts */ + CURRENT_THREAD_INFO(r9, r1) + lwz r9,TI_FLAGS(r9) +- andi. r0,r9,_TIF_NEED_RESCHED ++ andi. r0,r9,_TIF_NEED_RESCHED_MASK + bne- do_resched + andi. r0,r9,_TIF_USER_WORK_MASK + beq restore_user +diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S +index 5afd03e5e8b8..f5d4c2a033ef 100644 +--- a/arch/powerpc/kernel/entry_64.S ++++ b/arch/powerpc/kernel/entry_64.S +@@ -657,7 +657,7 @@ _GLOBAL(ret_from_except_lite) + bl restore_math + b restore + #endif +-1: andi. r0,r4,_TIF_NEED_RESCHED ++1: andi. r0,r4,_TIF_NEED_RESCHED_MASK + beq 2f + bl restore_interrupts + SCHEDULE_USER +@@ -719,10 +719,18 @@ _GLOBAL(ret_from_except_lite) + + #ifdef CONFIG_PREEMPT + /* Check if we need to preempt */ +- andi. r0,r4,_TIF_NEED_RESCHED +- beq+ restore +- /* Check that preempt_count() == 0 and interrupts are enabled */ + lwz r8,TI_PREEMPT(r9) ++ cmpwi 0,r8,0 /* if non-zero, just restore regs and return */ ++ bne restore ++ andi. r0,r4,_TIF_NEED_RESCHED ++ bne+ check_count ++ ++ andi. r0,r4,_TIF_NEED_RESCHED_LAZY ++ beq+ restore ++ lwz r8,TI_PREEMPT_LAZY(r9) ++ ++ /* Check that preempt_count() == 0 and interrupts are enabled */ ++check_count: + cmpwi cr1,r8,0 + ld r0,SOFTE(r1) + cmpdi r0,0 +@@ -739,7 +747,7 @@ _GLOBAL(ret_from_except_lite) + /* Re-test flags and eventually loop */ + CURRENT_THREAD_INFO(r9, r1) + ld r4,TI_FLAGS(r9) +- andi. r0,r4,_TIF_NEED_RESCHED ++ andi. r0,r4,_TIF_NEED_RESCHED_MASK + bne 1b + + /* +diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c +index 08887cf2b20e..f1770ea2d094 100644 +--- a/arch/powerpc/kernel/irq.c ++++ b/arch/powerpc/kernel/irq.c +@@ -633,6 +633,7 @@ void irq_ctx_init(void) + } + } + ++#ifndef CONFIG_PREEMPT_RT_FULL + void do_softirq_own_stack(void) + { + struct thread_info *curtp, *irqtp; +@@ -650,6 +651,7 @@ void do_softirq_own_stack(void) + if (irqtp->flags) + set_bits(irqtp->flags, &curtp->flags); + } ++#endif + + irq_hw_number_t virq_to_hw(unsigned int virq) + { +diff --git a/arch/powerpc/kernel/misc_32.S b/arch/powerpc/kernel/misc_32.S +index d9c912b6e632..7b2e997a5083 100644 +--- a/arch/powerpc/kernel/misc_32.S ++++ b/arch/powerpc/kernel/misc_32.S +@@ -40,6 +40,7 @@ + * We store the saved ksp_limit in the unused part + * of the STACK_FRAME_OVERHEAD + */ ++#ifndef CONFIG_PREEMPT_RT_FULL + _GLOBAL(call_do_softirq) + mflr r0 + stw r0,4(r1) +@@ -56,6 +57,7 @@ _GLOBAL(call_do_softirq) + stw r10,THREAD+KSP_LIMIT(r2) + mtlr r0 + blr ++#endif + + /* + * void call_do_irq(struct pt_regs *regs, struct thread_info *irqtp); +diff --git a/arch/powerpc/kernel/misc_64.S b/arch/powerpc/kernel/misc_64.S +index cb195157b318..c919a2bfd0ca 100644 +--- a/arch/powerpc/kernel/misc_64.S ++++ b/arch/powerpc/kernel/misc_64.S +@@ -30,6 +30,7 @@ + + .text + ++#ifndef CONFIG_PREEMPT_RT_FULL + _GLOBAL(call_do_softirq) + mflr r0 + std r0,16(r1) +@@ -40,6 +41,7 @@ _GLOBAL(call_do_softirq) + ld r0,16(r1) + mtlr r0 + blr ++#endif + + _GLOBAL(call_do_irq) + mflr r0 +diff --git a/arch/powerpc/kvm/Kconfig b/arch/powerpc/kvm/Kconfig +index c2024ac9d4e8..2303788da7e1 100644 +--- a/arch/powerpc/kvm/Kconfig ++++ b/arch/powerpc/kvm/Kconfig +@@ -172,6 +172,7 @@ config KVM_E500MC + config KVM_MPIC + bool "KVM in-kernel MPIC emulation" + depends on KVM && E500 ++ depends on !PREEMPT_RT_FULL + select HAVE_KVM_IRQCHIP + select HAVE_KVM_IRQFD + select HAVE_KVM_IRQ_ROUTING +diff --git a/arch/powerpc/platforms/ps3/device-init.c b/arch/powerpc/platforms/ps3/device-init.c +index 57caaf11a83f..030c9bfe52e3 100644 +--- a/arch/powerpc/platforms/ps3/device-init.c ++++ b/arch/powerpc/platforms/ps3/device-init.c +@@ -752,7 +752,7 @@ static int ps3_notification_read_write(struct ps3_notification_device *dev, + } + pr_debug("%s:%u: notification %s issued\n", __func__, __LINE__, op); + +- res = wait_event_interruptible(dev->done.wait, ++ res = swait_event_interruptible(dev->done.wait, + dev->done.done || kthread_should_stop()); + if (kthread_should_stop()) + res = -EINTR; +diff --git a/arch/sh/kernel/irq.c b/arch/sh/kernel/irq.c +index 6c0378c0b8b5..abd58b4dff97 100644 +--- a/arch/sh/kernel/irq.c ++++ b/arch/sh/kernel/irq.c +@@ -147,6 +147,7 @@ void irq_ctx_exit(int cpu) + hardirq_ctx[cpu] = NULL; + } + ++#ifndef CONFIG_PREEMPT_RT_FULL + void do_softirq_own_stack(void) + { + struct thread_info *curctx; +@@ -174,6 +175,7 @@ void do_softirq_own_stack(void) + "r5", "r6", "r7", "r8", "r9", "r15", "t", "pr" + ); + } ++#endif + #else + static inline void handle_one_irq(unsigned int irq) + { +diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig +index 59b09600dd32..1b073eb3dc2a 100644 +--- a/arch/sparc/Kconfig ++++ b/arch/sparc/Kconfig +@@ -187,12 +187,10 @@ config NR_CPUS + source kernel/Kconfig.hz + + config RWSEM_GENERIC_SPINLOCK +- bool +- default y if SPARC32 ++ def_bool PREEMPT_RT_FULL + + config RWSEM_XCHGADD_ALGORITHM +- bool +- default y if SPARC64 ++ def_bool !RWSEM_GENERIC_SPINLOCK && !PREEMPT_RT_FULL + + config GENERIC_HWEIGHT + bool +diff --git a/arch/sparc/kernel/irq_64.c b/arch/sparc/kernel/irq_64.c +index 34a7930b76ef..773740521008 100644 +--- a/arch/sparc/kernel/irq_64.c ++++ b/arch/sparc/kernel/irq_64.c +@@ -854,6 +854,7 @@ void __irq_entry handler_irq(int pil, struct pt_regs *regs) + set_irq_regs(old_regs); + } + ++#ifndef CONFIG_PREEMPT_RT_FULL + void do_softirq_own_stack(void) + { + void *orig_sp, *sp = softirq_stack[smp_processor_id()]; +@@ -868,6 +869,7 @@ void do_softirq_own_stack(void) + __asm__ __volatile__("mov %0, %%sp" + : : "r" (orig_sp)); + } ++#endif + + #ifdef CONFIG_HOTPLUG_CPU + void fixup_irqs(void) +diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig +index 2a1f0ce7c59a..bd4ab87efb31 100644 +--- a/arch/x86/Kconfig ++++ b/arch/x86/Kconfig +@@ -17,6 +17,7 @@ config X86_64 + ### Arch settings + config X86 + def_bool y ++ select HAVE_PREEMPT_LAZY + select ACPI_LEGACY_TABLES_LOOKUP if ACPI + select ACPI_SYSTEM_POWER_STATES_SUPPORT if ACPI + select ANON_INODES +@@ -231,8 +232,11 @@ config ARCH_MAY_HAVE_PC_FDC + def_bool y + depends on ISA_DMA_API + ++config RWSEM_GENERIC_SPINLOCK ++ def_bool PREEMPT_RT_FULL ++ + config RWSEM_XCHGADD_ALGORITHM +- def_bool y ++ def_bool !RWSEM_GENERIC_SPINLOCK && !PREEMPT_RT_FULL + + config GENERIC_CALIBRATE_DELAY + def_bool y +@@ -885,7 +889,7 @@ config IOMMU_HELPER + config MAXSMP + bool "Enable Maximum number of SMP Processors and NUMA Nodes" + depends on X86_64 && SMP && DEBUG_KERNEL +- select CPUMASK_OFFSTACK ++ select CPUMASK_OFFSTACK if !PREEMPT_RT_FULL + ---help--- + Enable maximum number of CPUS and NUMA Nodes for this architecture. + If unsure, say N. +diff --git a/arch/x86/crypto/aesni-intel_glue.c b/arch/x86/crypto/aesni-intel_glue.c +index 0ab5ee1c26af..fff8f6f1f90c 100644 +--- a/arch/x86/crypto/aesni-intel_glue.c ++++ b/arch/x86/crypto/aesni-intel_glue.c +@@ -372,14 +372,14 @@ static int ecb_encrypt(struct blkcipher_desc *desc, + err = blkcipher_walk_virt(desc, &walk); + desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; + +- kernel_fpu_begin(); + while ((nbytes = walk.nbytes)) { ++ kernel_fpu_begin(); + aesni_ecb_enc(ctx, walk.dst.virt.addr, walk.src.virt.addr, +- nbytes & AES_BLOCK_MASK); ++ nbytes & AES_BLOCK_MASK); ++ kernel_fpu_end(); + nbytes &= AES_BLOCK_SIZE - 1; + err = blkcipher_walk_done(desc, &walk, nbytes); + } +- kernel_fpu_end(); + + return err; + } +@@ -396,14 +396,14 @@ static int ecb_decrypt(struct blkcipher_desc *desc, + err = blkcipher_walk_virt(desc, &walk); + desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; + +- kernel_fpu_begin(); + while ((nbytes = walk.nbytes)) { ++ kernel_fpu_begin(); + aesni_ecb_dec(ctx, walk.dst.virt.addr, walk.src.virt.addr, + nbytes & AES_BLOCK_MASK); ++ kernel_fpu_end(); + nbytes &= AES_BLOCK_SIZE - 1; + err = blkcipher_walk_done(desc, &walk, nbytes); + } +- kernel_fpu_end(); + + return err; + } +@@ -420,14 +420,14 @@ static int cbc_encrypt(struct blkcipher_desc *desc, + err = blkcipher_walk_virt(desc, &walk); + desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; + +- kernel_fpu_begin(); + while ((nbytes = walk.nbytes)) { ++ kernel_fpu_begin(); + aesni_cbc_enc(ctx, walk.dst.virt.addr, walk.src.virt.addr, + nbytes & AES_BLOCK_MASK, walk.iv); ++ kernel_fpu_end(); + nbytes &= AES_BLOCK_SIZE - 1; + err = blkcipher_walk_done(desc, &walk, nbytes); + } +- kernel_fpu_end(); + + return err; + } +@@ -444,14 +444,14 @@ static int cbc_decrypt(struct blkcipher_desc *desc, + err = blkcipher_walk_virt(desc, &walk); + desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; + +- kernel_fpu_begin(); + while ((nbytes = walk.nbytes)) { ++ kernel_fpu_begin(); + aesni_cbc_dec(ctx, walk.dst.virt.addr, walk.src.virt.addr, + nbytes & AES_BLOCK_MASK, walk.iv); ++ kernel_fpu_end(); + nbytes &= AES_BLOCK_SIZE - 1; + err = blkcipher_walk_done(desc, &walk, nbytes); + } +- kernel_fpu_end(); + + return err; + } +@@ -503,18 +503,20 @@ static int ctr_crypt(struct blkcipher_desc *desc, + err = blkcipher_walk_virt_block(desc, &walk, AES_BLOCK_SIZE); + desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; + +- kernel_fpu_begin(); + while ((nbytes = walk.nbytes) >= AES_BLOCK_SIZE) { ++ kernel_fpu_begin(); + aesni_ctr_enc_tfm(ctx, walk.dst.virt.addr, walk.src.virt.addr, + nbytes & AES_BLOCK_MASK, walk.iv); ++ kernel_fpu_end(); + nbytes &= AES_BLOCK_SIZE - 1; + err = blkcipher_walk_done(desc, &walk, nbytes); + } + if (walk.nbytes) { ++ kernel_fpu_begin(); + ctr_crypt_final(ctx, &walk); ++ kernel_fpu_end(); + err = blkcipher_walk_done(desc, &walk, 0); + } +- kernel_fpu_end(); + + return err; + } +diff --git a/arch/x86/crypto/cast5_avx_glue.c b/arch/x86/crypto/cast5_avx_glue.c +index 8648158f3916..d7699130ee36 100644 +--- a/arch/x86/crypto/cast5_avx_glue.c ++++ b/arch/x86/crypto/cast5_avx_glue.c +@@ -59,7 +59,7 @@ static inline void cast5_fpu_end(bool fpu_enabled) + static int ecb_crypt(struct blkcipher_desc *desc, struct blkcipher_walk *walk, + bool enc) + { +- bool fpu_enabled = false; ++ bool fpu_enabled; + struct cast5_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); + const unsigned int bsize = CAST5_BLOCK_SIZE; + unsigned int nbytes; +@@ -75,7 +75,7 @@ static int ecb_crypt(struct blkcipher_desc *desc, struct blkcipher_walk *walk, + u8 *wsrc = walk->src.virt.addr; + u8 *wdst = walk->dst.virt.addr; + +- fpu_enabled = cast5_fpu_begin(fpu_enabled, nbytes); ++ fpu_enabled = cast5_fpu_begin(false, nbytes); + + /* Process multi-block batch */ + if (nbytes >= bsize * CAST5_PARALLEL_BLOCKS) { +@@ -103,10 +103,9 @@ static int ecb_crypt(struct blkcipher_desc *desc, struct blkcipher_walk *walk, + } while (nbytes >= bsize); + + done: ++ cast5_fpu_end(fpu_enabled); + err = blkcipher_walk_done(desc, walk, nbytes); + } +- +- cast5_fpu_end(fpu_enabled); + return err; + } + +@@ -227,7 +226,7 @@ static unsigned int __cbc_decrypt(struct blkcipher_desc *desc, + static int cbc_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst, + struct scatterlist *src, unsigned int nbytes) + { +- bool fpu_enabled = false; ++ bool fpu_enabled; + struct blkcipher_walk walk; + int err; + +@@ -236,12 +235,11 @@ static int cbc_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst, + desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; + + while ((nbytes = walk.nbytes)) { +- fpu_enabled = cast5_fpu_begin(fpu_enabled, nbytes); ++ fpu_enabled = cast5_fpu_begin(false, nbytes); + nbytes = __cbc_decrypt(desc, &walk); ++ cast5_fpu_end(fpu_enabled); + err = blkcipher_walk_done(desc, &walk, nbytes); + } +- +- cast5_fpu_end(fpu_enabled); + return err; + } + +@@ -311,7 +309,7 @@ static unsigned int __ctr_crypt(struct blkcipher_desc *desc, + static int ctr_crypt(struct blkcipher_desc *desc, struct scatterlist *dst, + struct scatterlist *src, unsigned int nbytes) + { +- bool fpu_enabled = false; ++ bool fpu_enabled; + struct blkcipher_walk walk; + int err; + +@@ -320,13 +318,12 @@ static int ctr_crypt(struct blkcipher_desc *desc, struct scatterlist *dst, + desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; + + while ((nbytes = walk.nbytes) >= CAST5_BLOCK_SIZE) { +- fpu_enabled = cast5_fpu_begin(fpu_enabled, nbytes); ++ fpu_enabled = cast5_fpu_begin(false, nbytes); + nbytes = __ctr_crypt(desc, &walk); ++ cast5_fpu_end(fpu_enabled); + err = blkcipher_walk_done(desc, &walk, nbytes); + } + +- cast5_fpu_end(fpu_enabled); +- + if (walk.nbytes) { + ctr_crypt_final(desc, &walk); + err = blkcipher_walk_done(desc, &walk, 0); +diff --git a/arch/x86/crypto/glue_helper.c b/arch/x86/crypto/glue_helper.c +index 6a85598931b5..3a506ce7ed93 100644 +--- a/arch/x86/crypto/glue_helper.c ++++ b/arch/x86/crypto/glue_helper.c +@@ -39,7 +39,7 @@ static int __glue_ecb_crypt_128bit(const struct common_glue_ctx *gctx, + void *ctx = crypto_blkcipher_ctx(desc->tfm); + const unsigned int bsize = 128 / 8; + unsigned int nbytes, i, func_bytes; +- bool fpu_enabled = false; ++ bool fpu_enabled; + int err; + + err = blkcipher_walk_virt(desc, walk); +@@ -49,7 +49,7 @@ static int __glue_ecb_crypt_128bit(const struct common_glue_ctx *gctx, + u8 *wdst = walk->dst.virt.addr; + + fpu_enabled = glue_fpu_begin(bsize, gctx->fpu_blocks_limit, +- desc, fpu_enabled, nbytes); ++ desc, false, nbytes); + + for (i = 0; i < gctx->num_funcs; i++) { + func_bytes = bsize * gctx->funcs[i].num_blocks; +@@ -71,10 +71,10 @@ static int __glue_ecb_crypt_128bit(const struct common_glue_ctx *gctx, + } + + done: ++ glue_fpu_end(fpu_enabled); + err = blkcipher_walk_done(desc, walk, nbytes); + } + +- glue_fpu_end(fpu_enabled); + return err; + } + +@@ -194,7 +194,7 @@ int glue_cbc_decrypt_128bit(const struct common_glue_ctx *gctx, + struct scatterlist *src, unsigned int nbytes) + { + const unsigned int bsize = 128 / 8; +- bool fpu_enabled = false; ++ bool fpu_enabled; + struct blkcipher_walk walk; + int err; + +@@ -203,12 +203,12 @@ int glue_cbc_decrypt_128bit(const struct common_glue_ctx *gctx, + + while ((nbytes = walk.nbytes)) { + fpu_enabled = glue_fpu_begin(bsize, gctx->fpu_blocks_limit, +- desc, fpu_enabled, nbytes); ++ desc, false, nbytes); + nbytes = __glue_cbc_decrypt_128bit(gctx, desc, &walk); ++ glue_fpu_end(fpu_enabled); + err = blkcipher_walk_done(desc, &walk, nbytes); + } + +- glue_fpu_end(fpu_enabled); + return err; + } + EXPORT_SYMBOL_GPL(glue_cbc_decrypt_128bit); +@@ -277,7 +277,7 @@ int glue_ctr_crypt_128bit(const struct common_glue_ctx *gctx, + struct scatterlist *src, unsigned int nbytes) + { + const unsigned int bsize = 128 / 8; +- bool fpu_enabled = false; ++ bool fpu_enabled; + struct blkcipher_walk walk; + int err; + +@@ -286,13 +286,12 @@ int glue_ctr_crypt_128bit(const struct common_glue_ctx *gctx, + + while ((nbytes = walk.nbytes) >= bsize) { + fpu_enabled = glue_fpu_begin(bsize, gctx->fpu_blocks_limit, +- desc, fpu_enabled, nbytes); ++ desc, false, nbytes); + nbytes = __glue_ctr_crypt_128bit(gctx, desc, &walk); ++ glue_fpu_end(fpu_enabled); + err = blkcipher_walk_done(desc, &walk, nbytes); + } + +- glue_fpu_end(fpu_enabled); +- + if (walk.nbytes) { + glue_ctr_crypt_final_128bit( + gctx->funcs[gctx->num_funcs - 1].fn_u.ctr, desc, &walk); +@@ -347,7 +346,7 @@ int glue_xts_crypt_128bit(const struct common_glue_ctx *gctx, + void *tweak_ctx, void *crypt_ctx) + { + const unsigned int bsize = 128 / 8; +- bool fpu_enabled = false; ++ bool fpu_enabled; + struct blkcipher_walk walk; + int err; + +@@ -360,21 +359,21 @@ int glue_xts_crypt_128bit(const struct common_glue_ctx *gctx, + + /* set minimum length to bsize, for tweak_fn */ + fpu_enabled = glue_fpu_begin(bsize, gctx->fpu_blocks_limit, +- desc, fpu_enabled, ++ desc, false, + nbytes < bsize ? bsize : nbytes); +- + /* calculate first value of T */ + tweak_fn(tweak_ctx, walk.iv, walk.iv); ++ glue_fpu_end(fpu_enabled); + + while (nbytes) { ++ fpu_enabled = glue_fpu_begin(bsize, gctx->fpu_blocks_limit, ++ desc, false, nbytes); + nbytes = __glue_xts_crypt_128bit(gctx, crypt_ctx, desc, &walk); + ++ glue_fpu_end(fpu_enabled); + err = blkcipher_walk_done(desc, &walk, nbytes); + nbytes = walk.nbytes; + } +- +- glue_fpu_end(fpu_enabled); +- + return err; + } + EXPORT_SYMBOL_GPL(glue_xts_crypt_128bit); +diff --git a/arch/x86/entry/common.c b/arch/x86/entry/common.c +index 1433f6b4607d..f963fde8e4fa 100644 +--- a/arch/x86/entry/common.c ++++ b/arch/x86/entry/common.c +@@ -136,7 +136,7 @@ static long syscall_trace_enter(struct pt_regs *regs) + + #define EXIT_TO_USERMODE_LOOP_FLAGS \ + (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_UPROBE | \ +- _TIF_NEED_RESCHED | _TIF_USER_RETURN_NOTIFY) ++ _TIF_NEED_RESCHED_MASK | _TIF_USER_RETURN_NOTIFY) + + static void exit_to_usermode_loop(struct pt_regs *regs, u32 cached_flags) + { +@@ -152,9 +152,16 @@ static void exit_to_usermode_loop(struct pt_regs *regs, u32 cached_flags) + /* We have work to do. */ + local_irq_enable(); + +- if (cached_flags & _TIF_NEED_RESCHED) ++ if (cached_flags & _TIF_NEED_RESCHED_MASK) + schedule(); + ++#ifdef ARCH_RT_DELAYS_SIGNAL_SEND ++ if (unlikely(current->forced_info.si_signo)) { ++ struct task_struct *t = current; ++ force_sig_info(t->forced_info.si_signo, &t->forced_info, t); ++ t->forced_info.si_signo = 0; ++ } ++#endif + if (cached_flags & _TIF_UPROBE) + uprobe_notify_resume(regs); + +diff --git a/arch/x86/entry/entry_32.S b/arch/x86/entry/entry_32.S +index 0b56666e6039..1d8ee026c9c5 100644 +--- a/arch/x86/entry/entry_32.S ++++ b/arch/x86/entry/entry_32.S +@@ -271,8 +271,25 @@ END(ret_from_exception) + ENTRY(resume_kernel) + DISABLE_INTERRUPTS(CLBR_ANY) + need_resched: ++ # preempt count == 0 + NEED_RS set? + cmpl $0, PER_CPU_VAR(__preempt_count) ++#ifndef CONFIG_PREEMPT_LAZY + jnz restore_all ++#else ++ jz test_int_off ++ ++ # atleast preempt count == 0 ? ++ cmpl $_PREEMPT_ENABLED,PER_CPU_VAR(__preempt_count) ++ jne restore_all ++ ++ GET_THREAD_INFO(%ebp) ++ cmpl $0,TI_preempt_lazy_count(%ebp) # non-zero preempt_lazy_count ? ++ jnz restore_all ++ ++ testl $_TIF_NEED_RESCHED_LAZY, TI_flags(%ebp) ++ jz restore_all ++test_int_off: ++#endif + testl $X86_EFLAGS_IF, PT_EFLAGS(%esp) # interrupts off (exception path) ? + jz restore_all + call preempt_schedule_irq +diff --git a/arch/x86/entry/entry_64.S b/arch/x86/entry/entry_64.S +index 02fff3ebfb87..81ec3d016df0 100644 +--- a/arch/x86/entry/entry_64.S ++++ b/arch/x86/entry/entry_64.S +@@ -512,7 +512,23 @@ GLOBAL(retint_user) + bt $9, EFLAGS(%rsp) /* were interrupts off? */ + jnc 1f + 0: cmpl $0, PER_CPU_VAR(__preempt_count) ++#ifndef CONFIG_PREEMPT_LAZY + jnz 1f ++#else ++ jz do_preempt_schedule_irq ++ ++ # atleast preempt count == 0 ? ++ cmpl $_PREEMPT_ENABLED,PER_CPU_VAR(__preempt_count) ++ jnz 1f ++ ++ GET_THREAD_INFO(%rcx) ++ cmpl $0, TI_preempt_lazy_count(%rcx) ++ jnz 1f ++ ++ bt $TIF_NEED_RESCHED_LAZY,TI_flags(%rcx) ++ jnc 1f ++do_preempt_schedule_irq: ++#endif + call preempt_schedule_irq + jmp 0b + 1: +@@ -817,6 +833,7 @@ END(native_load_gs_index) + jmp 2b + .previous + ++#ifndef CONFIG_PREEMPT_RT_FULL + /* Call softirq on interrupt stack. Interrupts are off. */ + ENTRY(do_softirq_own_stack) + pushq %rbp +@@ -829,6 +846,7 @@ ENTRY(do_softirq_own_stack) + decl PER_CPU_VAR(irq_count) + ret + END(do_softirq_own_stack) ++#endif + + #ifdef CONFIG_XEN + idtentry xen_hypervisor_callback xen_do_hypervisor_callback has_error_code=0 +diff --git a/arch/x86/include/asm/preempt.h b/arch/x86/include/asm/preempt.h +index 17f218645701..11bd1b7ee6eb 100644 +--- a/arch/x86/include/asm/preempt.h ++++ b/arch/x86/include/asm/preempt.h +@@ -79,17 +79,46 @@ static __always_inline void __preempt_count_sub(int val) + * a decrement which hits zero means we have no preempt_count and should + * reschedule. + */ +-static __always_inline bool __preempt_count_dec_and_test(void) ++static __always_inline bool ____preempt_count_dec_and_test(void) + { + GEN_UNARY_RMWcc("decl", __preempt_count, __percpu_arg(0), e); + } + ++static __always_inline bool __preempt_count_dec_and_test(void) ++{ ++ if (____preempt_count_dec_and_test()) ++ return true; ++#ifdef CONFIG_PREEMPT_LAZY ++ if (current_thread_info()->preempt_lazy_count) ++ return false; ++ return test_thread_flag(TIF_NEED_RESCHED_LAZY); ++#else ++ return false; ++#endif ++} ++ + /* + * Returns true when we need to resched and can (barring IRQ state). + */ + static __always_inline bool should_resched(int preempt_offset) + { ++#ifdef CONFIG_PREEMPT_LAZY ++ u32 tmp; ++ ++ tmp = raw_cpu_read_4(__preempt_count); ++ if (tmp == preempt_offset) ++ return true; ++ ++ /* preempt count == 0 ? */ ++ tmp &= ~PREEMPT_NEED_RESCHED; ++ if (tmp) ++ return false; ++ if (current_thread_info()->preempt_lazy_count) ++ return false; ++ return test_thread_flag(TIF_NEED_RESCHED_LAZY); ++#else + return unlikely(raw_cpu_read_4(__preempt_count) == preempt_offset); ++#endif + } + + #ifdef CONFIG_PREEMPT +diff --git a/arch/x86/include/asm/signal.h b/arch/x86/include/asm/signal.h +index dd1e7d6387ab..d59bedb28bab 100644 +--- a/arch/x86/include/asm/signal.h ++++ b/arch/x86/include/asm/signal.h +@@ -23,6 +23,19 @@ typedef struct { + unsigned long sig[_NSIG_WORDS]; + } sigset_t; + ++/* ++ * Because some traps use the IST stack, we must keep preemption ++ * disabled while calling do_trap(), but do_trap() may call ++ * force_sig_info() which will grab the signal spin_locks for the ++ * task, which in PREEMPT_RT_FULL are mutexes. By defining ++ * ARCH_RT_DELAYS_SIGNAL_SEND the force_sig_info() will set ++ * TIF_NOTIFY_RESUME and set up the signal to be sent on exit of the ++ * trap. ++ */ ++#if defined(CONFIG_PREEMPT_RT_FULL) ++#define ARCH_RT_DELAYS_SIGNAL_SEND ++#endif ++ + #ifndef CONFIG_COMPAT + typedef sigset_t compat_sigset_t; + #endif +diff --git a/arch/x86/include/asm/stackprotector.h b/arch/x86/include/asm/stackprotector.h +index 58505f01962f..02fa39652cd6 100644 +--- a/arch/x86/include/asm/stackprotector.h ++++ b/arch/x86/include/asm/stackprotector.h +@@ -59,7 +59,7 @@ + */ + static __always_inline void boot_init_stack_canary(void) + { +- u64 canary; ++ u64 uninitialized_var(canary); + u64 tsc; + + #ifdef CONFIG_X86_64 +@@ -70,8 +70,15 @@ static __always_inline void boot_init_stack_canary(void) + * of randomness. The TSC only matters for very early init, + * there it already has some randomness on most systems. Later + * on during the bootup the random pool has true entropy too. ++ * ++ * For preempt-rt we need to weaken the randomness a bit, as ++ * we can't call into the random generator from atomic context ++ * due to locking constraints. We just leave canary ++ * uninitialized and use the TSC based randomness on top of it. + */ ++#ifndef CONFIG_PREEMPT_RT_FULL + get_random_bytes(&canary, sizeof(canary)); ++#endif + tsc = rdtsc(); + canary += tsc + (tsc << 32UL); + +diff --git a/arch/x86/include/asm/thread_info.h b/arch/x86/include/asm/thread_info.h +index 8b7c8d8e0852..631059ef61da 100644 +--- a/arch/x86/include/asm/thread_info.h ++++ b/arch/x86/include/asm/thread_info.h +@@ -57,6 +57,8 @@ struct thread_info { + __u32 flags; /* low level flags */ + __u32 status; /* thread synchronous flags */ + __u32 cpu; /* current CPU */ ++ int preempt_lazy_count; /* 0 => lazy preemptable ++ <0 => BUG */ + }; + + #define INIT_THREAD_INFO(tsk) \ +@@ -73,6 +75,10 @@ struct thread_info { + + #include <asm/asm-offsets.h> + ++#define GET_THREAD_INFO(reg) \ ++ _ASM_MOV PER_CPU_VAR(cpu_current_top_of_stack),reg ; \ ++ _ASM_SUB $(THREAD_SIZE),reg ; ++ + #endif + + /* +@@ -91,6 +97,7 @@ struct thread_info { + #define TIF_SYSCALL_EMU 6 /* syscall emulation active */ + #define TIF_SYSCALL_AUDIT 7 /* syscall auditing active */ + #define TIF_SECCOMP 8 /* secure computing */ ++#define TIF_NEED_RESCHED_LAZY 9 /* lazy rescheduling necessary */ + #define TIF_USER_RETURN_NOTIFY 11 /* notify kernel of userspace return */ + #define TIF_UPROBE 12 /* breakpointed or singlestepping */ + #define TIF_NOTSC 16 /* TSC is not accessible in userland */ +@@ -115,6 +122,7 @@ struct thread_info { + #define _TIF_SYSCALL_EMU (1 << TIF_SYSCALL_EMU) + #define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT) + #define _TIF_SECCOMP (1 << TIF_SECCOMP) ++#define _TIF_NEED_RESCHED_LAZY (1 << TIF_NEED_RESCHED_LAZY) + #define _TIF_USER_RETURN_NOTIFY (1 << TIF_USER_RETURN_NOTIFY) + #define _TIF_UPROBE (1 << TIF_UPROBE) + #define _TIF_NOTSC (1 << TIF_NOTSC) +@@ -151,6 +159,8 @@ struct thread_info { + #define _TIF_WORK_CTXSW_PREV (_TIF_WORK_CTXSW|_TIF_USER_RETURN_NOTIFY) + #define _TIF_WORK_CTXSW_NEXT (_TIF_WORK_CTXSW) + ++#define _TIF_NEED_RESCHED_MASK (_TIF_NEED_RESCHED | _TIF_NEED_RESCHED_LAZY) ++ + #define STACK_WARN (THREAD_SIZE/8) + + /* +diff --git a/arch/x86/include/asm/uv/uv_bau.h b/arch/x86/include/asm/uv/uv_bau.h +index cc44d926c17e..df278aa0f638 100644 +--- a/arch/x86/include/asm/uv/uv_bau.h ++++ b/arch/x86/include/asm/uv/uv_bau.h +@@ -615,9 +615,9 @@ struct bau_control { + cycles_t send_message; + cycles_t period_end; + cycles_t period_time; +- spinlock_t uvhub_lock; +- spinlock_t queue_lock; +- spinlock_t disable_lock; ++ raw_spinlock_t uvhub_lock; ++ raw_spinlock_t queue_lock; ++ raw_spinlock_t disable_lock; + /* tunables */ + int max_concurr; + int max_concurr_const; +@@ -776,15 +776,15 @@ static inline int atom_asr(short i, struct atomic_short *v) + * to be lowered below the current 'v'. atomic_add_unless can only stop + * on equal. + */ +-static inline int atomic_inc_unless_ge(spinlock_t *lock, atomic_t *v, int u) ++static inline int atomic_inc_unless_ge(raw_spinlock_t *lock, atomic_t *v, int u) + { +- spin_lock(lock); ++ raw_spin_lock(lock); + if (atomic_read(v) >= u) { +- spin_unlock(lock); ++ raw_spin_unlock(lock); + return 0; + } + atomic_inc(v); +- spin_unlock(lock); ++ raw_spin_unlock(lock); + return 1; + } + +diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c +index fbd19444403f..e78f477a4ae3 100644 +--- a/arch/x86/kernel/acpi/boot.c ++++ b/arch/x86/kernel/acpi/boot.c +@@ -87,7 +87,9 @@ static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE; + * ->ioapic_mutex + * ->ioapic_lock + */ ++#ifdef CONFIG_X86_IO_APIC + static DEFINE_MUTEX(acpi_ioapic_lock); ++#endif + + /* -------------------------------------------------------------------------- + Boot-time Configuration +diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c +index 48e6d84f173e..0b5a8b994f65 100644 +--- a/arch/x86/kernel/apic/io_apic.c ++++ b/arch/x86/kernel/apic/io_apic.c +@@ -1712,7 +1712,8 @@ static bool io_apic_level_ack_pending(struct mp_chip_data *data) + static inline bool ioapic_irqd_mask(struct irq_data *data) + { + /* If we are moving the irq we need to mask it */ +- if (unlikely(irqd_is_setaffinity_pending(data))) { ++ if (unlikely(irqd_is_setaffinity_pending(data) && ++ !irqd_irq_inprogress(data))) { + mask_ioapic_irq(data); + return true; + } +diff --git a/arch/x86/kernel/asm-offsets.c b/arch/x86/kernel/asm-offsets.c +index 2bd5c6ff7ee7..a2c317f5839b 100644 +--- a/arch/x86/kernel/asm-offsets.c ++++ b/arch/x86/kernel/asm-offsets.c +@@ -31,6 +31,7 @@ void common(void) { + BLANK(); + OFFSET(TI_flags, thread_info, flags); + OFFSET(TI_status, thread_info, status); ++ OFFSET(TI_preempt_lazy_count, thread_info, preempt_lazy_count); + + BLANK(); + OFFSET(TASK_addr_limit, task_struct, thread.addr_limit); +@@ -88,4 +89,5 @@ void common(void) { + + BLANK(); + DEFINE(PTREGS_SIZE, sizeof(struct pt_regs)); ++ DEFINE(_PREEMPT_ENABLED, PREEMPT_ENABLED); + } +diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c +index 79d8ec849468..accbf0e806d0 100644 +--- a/arch/x86/kernel/cpu/mcheck/mce.c ++++ b/arch/x86/kernel/cpu/mcheck/mce.c +@@ -41,6 +41,8 @@ + #include <linux/debugfs.h> + #include <linux/irq_work.h> + #include <linux/export.h> ++#include <linux/jiffies.h> ++#include <linux/swork.h> + + #include <asm/processor.h> + #include <asm/traps.h> +@@ -1291,7 +1293,7 @@ void mce_log_therm_throt_event(__u64 status) + static unsigned long check_interval = INITIAL_CHECK_INTERVAL; + + static DEFINE_PER_CPU(unsigned long, mce_next_interval); /* in jiffies */ +-static DEFINE_PER_CPU(struct timer_list, mce_timer); ++static DEFINE_PER_CPU(struct hrtimer, mce_timer); + + static unsigned long mce_adjust_timer_default(unsigned long interval) + { +@@ -1300,32 +1302,18 @@ static unsigned long mce_adjust_timer_default(unsigned long interval) + + static unsigned long (*mce_adjust_timer)(unsigned long interval) = mce_adjust_timer_default; + +-static void __restart_timer(struct timer_list *t, unsigned long interval) ++static enum hrtimer_restart __restart_timer(struct hrtimer *timer, unsigned long interval) + { +- unsigned long when = jiffies + interval; +- unsigned long flags; +- +- local_irq_save(flags); +- +- if (timer_pending(t)) { +- if (time_before(when, t->expires)) +- mod_timer(t, when); +- } else { +- t->expires = round_jiffies(when); +- add_timer_on(t, smp_processor_id()); +- } +- +- local_irq_restore(flags); ++ if (!interval) ++ return HRTIMER_NORESTART; ++ hrtimer_forward_now(timer, ns_to_ktime(jiffies_to_nsecs(interval))); ++ return HRTIMER_RESTART; + } + +-static void mce_timer_fn(unsigned long data) ++static enum hrtimer_restart mce_timer_fn(struct hrtimer *timer) + { +- struct timer_list *t = this_cpu_ptr(&mce_timer); +- int cpu = smp_processor_id(); + unsigned long iv; + +- WARN_ON(cpu != data); +- + iv = __this_cpu_read(mce_next_interval); + + if (mce_available(this_cpu_ptr(&cpu_info))) { +@@ -1348,7 +1336,7 @@ static void mce_timer_fn(unsigned long data) + + done: + __this_cpu_write(mce_next_interval, iv); +- __restart_timer(t, iv); ++ return __restart_timer(timer, iv); + } + + /* +@@ -1356,7 +1344,7 @@ static void mce_timer_fn(unsigned long data) + */ + void mce_timer_kick(unsigned long interval) + { +- struct timer_list *t = this_cpu_ptr(&mce_timer); ++ struct hrtimer *t = this_cpu_ptr(&mce_timer); + unsigned long iv = __this_cpu_read(mce_next_interval); + + __restart_timer(t, interval); +@@ -1371,7 +1359,7 @@ static void mce_timer_delete_all(void) + int cpu; + + for_each_online_cpu(cpu) +- del_timer_sync(&per_cpu(mce_timer, cpu)); ++ hrtimer_cancel(&per_cpu(mce_timer, cpu)); + } + + static void mce_do_trigger(struct work_struct *work) +@@ -1381,6 +1369,56 @@ static void mce_do_trigger(struct work_struct *work) + + static DECLARE_WORK(mce_trigger_work, mce_do_trigger); + ++static void __mce_notify_work(struct swork_event *event) ++{ ++ /* Not more than two messages every minute */ ++ static DEFINE_RATELIMIT_STATE(ratelimit, 60*HZ, 2); ++ ++ /* wake processes polling /dev/mcelog */ ++ wake_up_interruptible(&mce_chrdev_wait); ++ ++ /* ++ * There is no risk of missing notifications because ++ * work_pending is always cleared before the function is ++ * executed. ++ */ ++ if (mce_helper[0] && !work_pending(&mce_trigger_work)) ++ schedule_work(&mce_trigger_work); ++ ++ if (__ratelimit(&ratelimit)) ++ pr_info(HW_ERR "Machine check events logged\n"); ++} ++ ++#ifdef CONFIG_PREEMPT_RT_FULL ++static bool notify_work_ready __read_mostly; ++static struct swork_event notify_work; ++ ++static int mce_notify_work_init(void) ++{ ++ int err; ++ ++ err = swork_get(); ++ if (err) ++ return err; ++ ++ INIT_SWORK(¬ify_work, __mce_notify_work); ++ notify_work_ready = true; ++ return 0; ++} ++ ++static void mce_notify_work(void) ++{ ++ if (notify_work_ready) ++ swork_queue(¬ify_work); ++} ++#else ++static void mce_notify_work(void) ++{ ++ __mce_notify_work(NULL); ++} ++static inline int mce_notify_work_init(void) { return 0; } ++#endif ++ + /* + * Notify the user(s) about new machine check events. + * Can be called from interrupt context, but not from machine check/NMI +@@ -1388,19 +1426,8 @@ static DECLARE_WORK(mce_trigger_work, mce_do_trigger); + */ + int mce_notify_irq(void) + { +- /* Not more than two messages every minute */ +- static DEFINE_RATELIMIT_STATE(ratelimit, 60*HZ, 2); +- + if (test_and_clear_bit(0, &mce_need_notify)) { +- /* wake processes polling /dev/mcelog */ +- wake_up_interruptible(&mce_chrdev_wait); +- +- if (mce_helper[0]) +- schedule_work(&mce_trigger_work); +- +- if (__ratelimit(&ratelimit)) +- pr_info(HW_ERR "Machine check events logged\n"); +- ++ mce_notify_work(); + return 1; + } + return 0; +@@ -1717,7 +1744,7 @@ static void __mcheck_cpu_clear_vendor(struct cpuinfo_x86 *c) + } + } + +-static void mce_start_timer(unsigned int cpu, struct timer_list *t) ++static void mce_start_timer(unsigned int cpu, struct hrtimer *t) + { + unsigned long iv = check_interval * HZ; + +@@ -1726,16 +1753,17 @@ static void mce_start_timer(unsigned int cpu, struct timer_list *t) + + per_cpu(mce_next_interval, cpu) = iv; + +- t->expires = round_jiffies(jiffies + iv); +- add_timer_on(t, cpu); ++ hrtimer_start_range_ns(t, ns_to_ktime(jiffies_to_usecs(iv) * 1000ULL), ++ 0, HRTIMER_MODE_REL_PINNED); + } + + static void __mcheck_cpu_init_timer(void) + { +- struct timer_list *t = this_cpu_ptr(&mce_timer); ++ struct hrtimer *t = this_cpu_ptr(&mce_timer); + unsigned int cpu = smp_processor_id(); + +- setup_pinned_timer(t, mce_timer_fn, cpu); ++ hrtimer_init(t, CLOCK_MONOTONIC, HRTIMER_MODE_REL); ++ t->function = mce_timer_fn; + mce_start_timer(cpu, t); + } + +@@ -2459,6 +2487,8 @@ static void mce_disable_cpu(void *h) + if (!mce_available(raw_cpu_ptr(&cpu_info))) + return; + ++ hrtimer_cancel(this_cpu_ptr(&mce_timer)); ++ + if (!(action & CPU_TASKS_FROZEN)) + cmci_clear(); + +@@ -2481,6 +2511,7 @@ static void mce_reenable_cpu(void *h) + if (b->init) + wrmsrl(msr_ops.ctl(i), b->ctl); + } ++ __mcheck_cpu_init_timer(); + } + + /* Get notified when a cpu comes on/off. Be hotplug friendly. */ +@@ -2488,7 +2519,6 @@ static int + mce_cpu_callback(struct notifier_block *nfb, unsigned long action, void *hcpu) + { + unsigned int cpu = (unsigned long)hcpu; +- struct timer_list *t = &per_cpu(mce_timer, cpu); + + switch (action & ~CPU_TASKS_FROZEN) { + case CPU_ONLINE: +@@ -2508,11 +2538,9 @@ mce_cpu_callback(struct notifier_block *nfb, unsigned long action, void *hcpu) + break; + case CPU_DOWN_PREPARE: + smp_call_function_single(cpu, mce_disable_cpu, &action, 1); +- del_timer_sync(t); + break; + case CPU_DOWN_FAILED: + smp_call_function_single(cpu, mce_reenable_cpu, &action, 1); +- mce_start_timer(cpu, t); + break; + } + +@@ -2551,6 +2579,10 @@ static __init int mcheck_init_device(void) + goto err_out; + } + ++ err = mce_notify_work_init(); ++ if (err) ++ goto err_out; ++ + if (!zalloc_cpumask_var(&mce_device_initialized, GFP_KERNEL)) { + err = -ENOMEM; + goto err_out; +diff --git a/arch/x86/kernel/dumpstack_32.c b/arch/x86/kernel/dumpstack_32.c +index 09675712eba8..eea7557b355d 100644 +--- a/arch/x86/kernel/dumpstack_32.c ++++ b/arch/x86/kernel/dumpstack_32.c +@@ -42,7 +42,7 @@ void dump_trace(struct task_struct *task, struct pt_regs *regs, + unsigned long *stack, unsigned long bp, + const struct stacktrace_ops *ops, void *data) + { +- const unsigned cpu = get_cpu(); ++ const unsigned cpu = get_cpu_light(); + int graph = 0; + u32 *prev_esp; + +@@ -84,7 +84,7 @@ void dump_trace(struct task_struct *task, struct pt_regs *regs, + break; + touch_nmi_watchdog(); + } +- put_cpu(); ++ put_cpu_light(); + } + EXPORT_SYMBOL(dump_trace); + +diff --git a/arch/x86/kernel/dumpstack_64.c b/arch/x86/kernel/dumpstack_64.c +index 9ee4520ce83c..2cd610b68868 100644 +--- a/arch/x86/kernel/dumpstack_64.c ++++ b/arch/x86/kernel/dumpstack_64.c +@@ -152,7 +152,7 @@ void dump_trace(struct task_struct *task, struct pt_regs *regs, + unsigned long *stack, unsigned long bp, + const struct stacktrace_ops *ops, void *data) + { +- const unsigned cpu = get_cpu(); ++ const unsigned cpu = get_cpu_light(); + unsigned long *irq_stack = (unsigned long *)per_cpu(irq_stack_ptr, cpu); + unsigned long dummy; + unsigned used = 0; +@@ -239,7 +239,7 @@ void dump_trace(struct task_struct *task, struct pt_regs *regs, + * This handles the process stack: + */ + bp = ops->walk_stack(task, stack, bp, ops, data, NULL, &graph); +- put_cpu(); ++ put_cpu_light(); + } + EXPORT_SYMBOL(dump_trace); + +@@ -253,7 +253,7 @@ show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs, + int cpu; + int i; + +- preempt_disable(); ++ migrate_disable(); + cpu = smp_processor_id(); + + irq_stack_end = (unsigned long *)(per_cpu(irq_stack_ptr, cpu)); +@@ -299,7 +299,7 @@ show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs, + stack++; + touch_nmi_watchdog(); + } +- preempt_enable(); ++ migrate_enable(); + + pr_cont("\n"); + show_trace_log_lvl(task, regs, sp, bp, log_lvl); +diff --git a/arch/x86/kernel/irq_32.c b/arch/x86/kernel/irq_32.c +index 1f38d9a4d9de..053bf3b2ef39 100644 +--- a/arch/x86/kernel/irq_32.c ++++ b/arch/x86/kernel/irq_32.c +@@ -127,6 +127,7 @@ void irq_ctx_init(int cpu) + cpu, per_cpu(hardirq_stack, cpu), per_cpu(softirq_stack, cpu)); + } + ++#ifndef CONFIG_PREEMPT_RT_FULL + void do_softirq_own_stack(void) + { + struct irq_stack *irqstk; +@@ -143,6 +144,7 @@ void do_softirq_own_stack(void) + + call_on_stack(__do_softirq, isp); + } ++#endif + + bool handle_irq(struct irq_desc *desc, struct pt_regs *regs) + { +diff --git a/arch/x86/kernel/process_32.c b/arch/x86/kernel/process_32.c +index d86be29c38c7..b0e29d1a0571 100644 +--- a/arch/x86/kernel/process_32.c ++++ b/arch/x86/kernel/process_32.c +@@ -35,6 +35,7 @@ + #include <linux/uaccess.h> + #include <linux/io.h> + #include <linux/kdebug.h> ++#include <linux/highmem.h> + + #include <asm/pgtable.h> + #include <asm/ldt.h> +@@ -210,6 +211,35 @@ start_thread(struct pt_regs *regs, unsigned long new_ip, unsigned long new_sp) + } + EXPORT_SYMBOL_GPL(start_thread); + ++#ifdef CONFIG_PREEMPT_RT_FULL ++static void switch_kmaps(struct task_struct *prev_p, struct task_struct *next_p) ++{ ++ int i; ++ ++ /* ++ * Clear @prev's kmap_atomic mappings ++ */ ++ for (i = 0; i < prev_p->kmap_idx; i++) { ++ int idx = i + KM_TYPE_NR * smp_processor_id(); ++ pte_t *ptep = kmap_pte - idx; ++ ++ kpte_clear_flush(ptep, __fix_to_virt(FIX_KMAP_BEGIN + idx)); ++ } ++ /* ++ * Restore @next_p's kmap_atomic mappings ++ */ ++ for (i = 0; i < next_p->kmap_idx; i++) { ++ int idx = i + KM_TYPE_NR * smp_processor_id(); ++ ++ if (!pte_none(next_p->kmap_pte[i])) ++ set_pte(kmap_pte - idx, next_p->kmap_pte[i]); ++ } ++} ++#else ++static inline void ++switch_kmaps(struct task_struct *prev_p, struct task_struct *next_p) { } ++#endif ++ + + /* + * switch_to(x,y) should switch tasks from x to y. +@@ -286,6 +316,8 @@ __switch_to(struct task_struct *prev_p, struct task_struct *next_p) + task_thread_info(next_p)->flags & _TIF_WORK_CTXSW_NEXT)) + __switch_to_xtra(prev_p, next_p, tss); + ++ switch_kmaps(prev_p, next_p); ++ + /* + * Leave lazy mode, flushing any hypercalls made here. + * This must be done before restoring TLS segments so +diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c +index b62c85229711..d907b281a9d6 100644 +--- a/arch/x86/kvm/lapic.c ++++ b/arch/x86/kvm/lapic.c +@@ -1938,6 +1938,7 @@ int kvm_create_lapic(struct kvm_vcpu *vcpu) + hrtimer_init(&apic->lapic_timer.timer, CLOCK_MONOTONIC, + HRTIMER_MODE_ABS_PINNED); + apic->lapic_timer.timer.function = apic_timer_fn; ++ apic->lapic_timer.timer.irqsafe = 1; + + /* + * APIC is created enabled. This will prevent kvm_lapic_set_base from +diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c +index 699f8726539a..24f30c86510c 100644 +--- a/arch/x86/kvm/x86.c ++++ b/arch/x86/kvm/x86.c +@@ -5865,6 +5865,13 @@ int kvm_arch_init(void *opaque) + goto out; + } + ++#ifdef CONFIG_PREEMPT_RT_FULL ++ if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) { ++ printk(KERN_ERR "RT requires X86_FEATURE_CONSTANT_TSC\n"); ++ return -EOPNOTSUPP; ++ } ++#endif ++ + r = kvm_mmu_module_init(); + if (r) + goto out_free_percpu; +diff --git a/arch/x86/mm/highmem_32.c b/arch/x86/mm/highmem_32.c +index 6d18b70ed5a9..f752724c22e8 100644 +--- a/arch/x86/mm/highmem_32.c ++++ b/arch/x86/mm/highmem_32.c +@@ -32,10 +32,11 @@ EXPORT_SYMBOL(kunmap); + */ + void *kmap_atomic_prot(struct page *page, pgprot_t prot) + { ++ pte_t pte = mk_pte(page, prot); + unsigned long vaddr; + int idx, type; + +- preempt_disable(); ++ preempt_disable_nort(); + pagefault_disable(); + + if (!PageHighMem(page)) +@@ -45,7 +46,10 @@ void *kmap_atomic_prot(struct page *page, pgprot_t prot) + idx = type + KM_TYPE_NR*smp_processor_id(); + vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx); + BUG_ON(!pte_none(*(kmap_pte-idx))); +- set_pte(kmap_pte-idx, mk_pte(page, prot)); ++#ifdef CONFIG_PREEMPT_RT_FULL ++ current->kmap_pte[type] = pte; ++#endif ++ set_pte(kmap_pte-idx, pte); + arch_flush_lazy_mmu_mode(); + + return (void *)vaddr; +@@ -88,6 +92,9 @@ void __kunmap_atomic(void *kvaddr) + * is a bad idea also, in case the page changes cacheability + * attributes or becomes a protected page in a hypervisor. + */ ++#ifdef CONFIG_PREEMPT_RT_FULL ++ current->kmap_pte[type] = __pte(0); ++#endif + kpte_clear_flush(kmap_pte-idx, vaddr); + kmap_atomic_idx_pop(); + arch_flush_lazy_mmu_mode(); +@@ -100,7 +107,7 @@ void __kunmap_atomic(void *kvaddr) + #endif + + pagefault_enable(); +- preempt_enable(); ++ preempt_enable_nort(); + } + EXPORT_SYMBOL(__kunmap_atomic); + +diff --git a/arch/x86/mm/iomap_32.c b/arch/x86/mm/iomap_32.c +index ada98b39b8ad..585f6829653b 100644 +--- a/arch/x86/mm/iomap_32.c ++++ b/arch/x86/mm/iomap_32.c +@@ -56,6 +56,7 @@ EXPORT_SYMBOL_GPL(iomap_free); + + void *kmap_atomic_prot_pfn(unsigned long pfn, pgprot_t prot) + { ++ pte_t pte = pfn_pte(pfn, prot); + unsigned long vaddr; + int idx, type; + +@@ -65,7 +66,12 @@ void *kmap_atomic_prot_pfn(unsigned long pfn, pgprot_t prot) + type = kmap_atomic_idx_push(); + idx = type + KM_TYPE_NR * smp_processor_id(); + vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx); +- set_pte(kmap_pte - idx, pfn_pte(pfn, prot)); ++ WARN_ON(!pte_none(*(kmap_pte - idx))); ++ ++#ifdef CONFIG_PREEMPT_RT_FULL ++ current->kmap_pte[type] = pte; ++#endif ++ set_pte(kmap_pte - idx, pte); + arch_flush_lazy_mmu_mode(); + + return (void *)vaddr; +@@ -113,6 +119,9 @@ iounmap_atomic(void __iomem *kvaddr) + * is a bad idea also, in case the page changes cacheability + * attributes or becomes a protected page in a hypervisor. + */ ++#ifdef CONFIG_PREEMPT_RT_FULL ++ current->kmap_pte[type] = __pte(0); ++#endif + kpte_clear_flush(kmap_pte-idx, vaddr); + kmap_atomic_idx_pop(); + } +diff --git a/arch/x86/platform/uv/tlb_uv.c b/arch/x86/platform/uv/tlb_uv.c +index fdb4d42b4ce5..8ab90fbecff0 100644 +--- a/arch/x86/platform/uv/tlb_uv.c ++++ b/arch/x86/platform/uv/tlb_uv.c +@@ -729,9 +729,9 @@ static void destination_plugged(struct bau_desc *bau_desc, + + quiesce_local_uvhub(hmaster); + +- spin_lock(&hmaster->queue_lock); ++ raw_spin_lock(&hmaster->queue_lock); + reset_with_ipi(&bau_desc->distribution, bcp); +- spin_unlock(&hmaster->queue_lock); ++ raw_spin_unlock(&hmaster->queue_lock); + + end_uvhub_quiesce(hmaster); + +@@ -751,9 +751,9 @@ static void destination_timeout(struct bau_desc *bau_desc, + + quiesce_local_uvhub(hmaster); + +- spin_lock(&hmaster->queue_lock); ++ raw_spin_lock(&hmaster->queue_lock); + reset_with_ipi(&bau_desc->distribution, bcp); +- spin_unlock(&hmaster->queue_lock); ++ raw_spin_unlock(&hmaster->queue_lock); + + end_uvhub_quiesce(hmaster); + +@@ -774,7 +774,7 @@ static void disable_for_period(struct bau_control *bcp, struct ptc_stats *stat) + cycles_t tm1; + + hmaster = bcp->uvhub_master; +- spin_lock(&hmaster->disable_lock); ++ raw_spin_lock(&hmaster->disable_lock); + if (!bcp->baudisabled) { + stat->s_bau_disabled++; + tm1 = get_cycles(); +@@ -787,7 +787,7 @@ static void disable_for_period(struct bau_control *bcp, struct ptc_stats *stat) + } + } + } +- spin_unlock(&hmaster->disable_lock); ++ raw_spin_unlock(&hmaster->disable_lock); + } + + static void count_max_concurr(int stat, struct bau_control *bcp, +@@ -850,7 +850,7 @@ static void record_send_stats(cycles_t time1, cycles_t time2, + */ + static void uv1_throttle(struct bau_control *hmaster, struct ptc_stats *stat) + { +- spinlock_t *lock = &hmaster->uvhub_lock; ++ raw_spinlock_t *lock = &hmaster->uvhub_lock; + atomic_t *v; + + v = &hmaster->active_descriptor_count; +@@ -983,7 +983,7 @@ static int check_enable(struct bau_control *bcp, struct ptc_stats *stat) + struct bau_control *hmaster; + + hmaster = bcp->uvhub_master; +- spin_lock(&hmaster->disable_lock); ++ raw_spin_lock(&hmaster->disable_lock); + if (bcp->baudisabled && (get_cycles() >= bcp->set_bau_on_time)) { + stat->s_bau_reenabled++; + for_each_present_cpu(tcpu) { +@@ -995,10 +995,10 @@ static int check_enable(struct bau_control *bcp, struct ptc_stats *stat) + tbcp->period_giveups = 0; + } + } +- spin_unlock(&hmaster->disable_lock); ++ raw_spin_unlock(&hmaster->disable_lock); + return 0; + } +- spin_unlock(&hmaster->disable_lock); ++ raw_spin_unlock(&hmaster->disable_lock); + return -1; + } + +@@ -1916,9 +1916,9 @@ static void __init init_per_cpu_tunables(void) + bcp->cong_reps = congested_reps; + bcp->disabled_period = sec_2_cycles(disabled_period); + bcp->giveup_limit = giveup_limit; +- spin_lock_init(&bcp->queue_lock); +- spin_lock_init(&bcp->uvhub_lock); +- spin_lock_init(&bcp->disable_lock); ++ raw_spin_lock_init(&bcp->queue_lock); ++ raw_spin_lock_init(&bcp->uvhub_lock); ++ raw_spin_lock_init(&bcp->disable_lock); + } + } + +diff --git a/arch/x86/platform/uv/uv_time.c b/arch/x86/platform/uv/uv_time.c +index b333fc45f9ec..8b85916e6986 100644 +--- a/arch/x86/platform/uv/uv_time.c ++++ b/arch/x86/platform/uv/uv_time.c +@@ -57,7 +57,7 @@ static DEFINE_PER_CPU(struct clock_event_device, cpu_ced); + + /* There is one of these allocated per node */ + struct uv_rtc_timer_head { +- spinlock_t lock; ++ raw_spinlock_t lock; + /* next cpu waiting for timer, local node relative: */ + int next_cpu; + /* number of cpus on this node: */ +@@ -177,7 +177,7 @@ static __init int uv_rtc_allocate_timers(void) + uv_rtc_deallocate_timers(); + return -ENOMEM; + } +- spin_lock_init(&head->lock); ++ raw_spin_lock_init(&head->lock); + head->ncpus = uv_blade_nr_possible_cpus(bid); + head->next_cpu = -1; + blade_info[bid] = head; +@@ -231,7 +231,7 @@ static int uv_rtc_set_timer(int cpu, u64 expires) + unsigned long flags; + int next_cpu; + +- spin_lock_irqsave(&head->lock, flags); ++ raw_spin_lock_irqsave(&head->lock, flags); + + next_cpu = head->next_cpu; + *t = expires; +@@ -243,12 +243,12 @@ static int uv_rtc_set_timer(int cpu, u64 expires) + if (uv_setup_intr(cpu, expires)) { + *t = ULLONG_MAX; + uv_rtc_find_next_timer(head, pnode); +- spin_unlock_irqrestore(&head->lock, flags); ++ raw_spin_unlock_irqrestore(&head->lock, flags); + return -ETIME; + } + } + +- spin_unlock_irqrestore(&head->lock, flags); ++ raw_spin_unlock_irqrestore(&head->lock, flags); + return 0; + } + +@@ -267,7 +267,7 @@ static int uv_rtc_unset_timer(int cpu, int force) + unsigned long flags; + int rc = 0; + +- spin_lock_irqsave(&head->lock, flags); ++ raw_spin_lock_irqsave(&head->lock, flags); + + if ((head->next_cpu == bcpu && uv_read_rtc(NULL) >= *t) || force) + rc = 1; +@@ -279,7 +279,7 @@ static int uv_rtc_unset_timer(int cpu, int force) + uv_rtc_find_next_timer(head, pnode); + } + +- spin_unlock_irqrestore(&head->lock, flags); ++ raw_spin_unlock_irqrestore(&head->lock, flags); + + return rc; + } +@@ -299,13 +299,18 @@ static int uv_rtc_unset_timer(int cpu, int force) + static cycle_t uv_read_rtc(struct clocksource *cs) + { + unsigned long offset; ++ cycle_t cycles; + ++ preempt_disable(); + if (uv_get_min_hub_revision_id() == 1) + offset = 0; + else + offset = (uv_blade_processor_id() * L1_CACHE_BYTES) % PAGE_SIZE; + +- return (cycle_t)uv_read_local_mmr(UVH_RTC | offset); ++ cycles = (cycle_t)uv_read_local_mmr(UVH_RTC | offset); ++ preempt_enable(); ++ ++ return cycles; + } + + /* +diff --git a/block/blk-core.c b/block/blk-core.c +index 36c7ac328d8c..caa5fc1be2a2 100644 +--- a/block/blk-core.c ++++ b/block/blk-core.c +@@ -125,6 +125,9 @@ void blk_rq_init(struct request_queue *q, struct request *rq) + + INIT_LIST_HEAD(&rq->queuelist); + INIT_LIST_HEAD(&rq->timeout_list); ++#ifdef CONFIG_PREEMPT_RT_FULL ++ INIT_WORK(&rq->work, __blk_mq_complete_request_remote_work); ++#endif + rq->cpu = -1; + rq->q = q; + rq->__sector = (sector_t) -1; +@@ -233,7 +236,7 @@ EXPORT_SYMBOL(blk_start_queue_async); + **/ + void blk_start_queue(struct request_queue *q) + { +- WARN_ON(!irqs_disabled()); ++ WARN_ON_NONRT(!irqs_disabled()); + + queue_flag_clear(QUEUE_FLAG_STOPPED, q); + __blk_run_queue(q); +@@ -659,7 +662,7 @@ int blk_queue_enter(struct request_queue *q, bool nowait) + if (nowait) + return -EBUSY; + +- ret = wait_event_interruptible(q->mq_freeze_wq, ++ ret = swait_event_interruptible(q->mq_freeze_wq, + !atomic_read(&q->mq_freeze_depth) || + blk_queue_dying(q)); + if (blk_queue_dying(q)) +@@ -679,7 +682,7 @@ static void blk_queue_usage_counter_release(struct percpu_ref *ref) + struct request_queue *q = + container_of(ref, struct request_queue, q_usage_counter); + +- wake_up_all(&q->mq_freeze_wq); ++ swake_up_all(&q->mq_freeze_wq); + } + + static void blk_rq_timed_out_timer(unsigned long data) +@@ -748,7 +751,7 @@ struct request_queue *blk_alloc_queue_node(gfp_t gfp_mask, int node_id) + q->bypass_depth = 1; + __set_bit(QUEUE_FLAG_BYPASS, &q->queue_flags); + +- init_waitqueue_head(&q->mq_freeze_wq); ++ init_swait_queue_head(&q->mq_freeze_wq); + + /* + * Init percpu_ref in atomic mode so that it's faster to shutdown. +@@ -3171,7 +3174,7 @@ static void queue_unplugged(struct request_queue *q, unsigned int depth, + blk_run_queue_async(q); + else + __blk_run_queue(q); +- spin_unlock(q->queue_lock); ++ spin_unlock_irq(q->queue_lock); + } + + static void flush_plug_callbacks(struct blk_plug *plug, bool from_schedule) +@@ -3219,7 +3222,6 @@ EXPORT_SYMBOL(blk_check_plugged); + void blk_flush_plug_list(struct blk_plug *plug, bool from_schedule) + { + struct request_queue *q; +- unsigned long flags; + struct request *rq; + LIST_HEAD(list); + unsigned int depth; +@@ -3239,11 +3241,6 @@ void blk_flush_plug_list(struct blk_plug *plug, bool from_schedule) + q = NULL; + depth = 0; + +- /* +- * Save and disable interrupts here, to avoid doing it for every +- * queue lock we have to take. +- */ +- local_irq_save(flags); + while (!list_empty(&list)) { + rq = list_entry_rq(list.next); + list_del_init(&rq->queuelist); +@@ -3256,7 +3253,7 @@ void blk_flush_plug_list(struct blk_plug *plug, bool from_schedule) + queue_unplugged(q, depth, from_schedule); + q = rq->q; + depth = 0; +- spin_lock(q->queue_lock); ++ spin_lock_irq(q->queue_lock); + } + + /* +@@ -3283,8 +3280,6 @@ void blk_flush_plug_list(struct blk_plug *plug, bool from_schedule) + */ + if (q) + queue_unplugged(q, depth, from_schedule); +- +- local_irq_restore(flags); + } + + void blk_finish_plug(struct blk_plug *plug) +diff --git a/block/blk-ioc.c b/block/blk-ioc.c +index 381cb50a673c..dc8785233d94 100644 +--- a/block/blk-ioc.c ++++ b/block/blk-ioc.c +@@ -7,6 +7,7 @@ + #include <linux/bio.h> + #include <linux/blkdev.h> + #include <linux/slab.h> ++#include <linux/delay.h> + + #include "blk.h" + +@@ -109,7 +110,7 @@ static void ioc_release_fn(struct work_struct *work) + spin_unlock(q->queue_lock); + } else { + spin_unlock_irqrestore(&ioc->lock, flags); +- cpu_relax(); ++ cpu_chill(); + spin_lock_irqsave_nested(&ioc->lock, flags, 1); + } + } +@@ -187,7 +188,7 @@ void put_io_context_active(struct io_context *ioc) + spin_unlock(icq->q->queue_lock); + } else { + spin_unlock_irqrestore(&ioc->lock, flags); +- cpu_relax(); ++ cpu_chill(); + goto retry; + } + } +diff --git a/block/blk-mq-cpu.c b/block/blk-mq-cpu.c +index bb3ed488f7b5..628c6c13c482 100644 +--- a/block/blk-mq-cpu.c ++++ b/block/blk-mq-cpu.c +@@ -16,7 +16,7 @@ + #include "blk-mq.h" + + static LIST_HEAD(blk_mq_cpu_notify_list); +-static DEFINE_RAW_SPINLOCK(blk_mq_cpu_notify_lock); ++static DEFINE_SPINLOCK(blk_mq_cpu_notify_lock); + + static int blk_mq_main_cpu_notify(struct notifier_block *self, + unsigned long action, void *hcpu) +@@ -25,7 +25,10 @@ static int blk_mq_main_cpu_notify(struct notifier_block *self, + struct blk_mq_cpu_notifier *notify; + int ret = NOTIFY_OK; + +- raw_spin_lock(&blk_mq_cpu_notify_lock); ++ if (action != CPU_POST_DEAD) ++ return NOTIFY_OK; ++ ++ spin_lock(&blk_mq_cpu_notify_lock); + + list_for_each_entry(notify, &blk_mq_cpu_notify_list, list) { + ret = notify->notify(notify->data, action, cpu); +@@ -33,7 +36,7 @@ static int blk_mq_main_cpu_notify(struct notifier_block *self, + break; + } + +- raw_spin_unlock(&blk_mq_cpu_notify_lock); ++ spin_unlock(&blk_mq_cpu_notify_lock); + return ret; + } + +@@ -41,16 +44,16 @@ void blk_mq_register_cpu_notifier(struct blk_mq_cpu_notifier *notifier) + { + BUG_ON(!notifier->notify); + +- raw_spin_lock(&blk_mq_cpu_notify_lock); ++ spin_lock(&blk_mq_cpu_notify_lock); + list_add_tail(¬ifier->list, &blk_mq_cpu_notify_list); +- raw_spin_unlock(&blk_mq_cpu_notify_lock); ++ spin_unlock(&blk_mq_cpu_notify_lock); + } + + void blk_mq_unregister_cpu_notifier(struct blk_mq_cpu_notifier *notifier) + { +- raw_spin_lock(&blk_mq_cpu_notify_lock); ++ spin_lock(&blk_mq_cpu_notify_lock); + list_del(¬ifier->list); +- raw_spin_unlock(&blk_mq_cpu_notify_lock); ++ spin_unlock(&blk_mq_cpu_notify_lock); + } + + void blk_mq_init_cpu_notifier(struct blk_mq_cpu_notifier *notifier, +diff --git a/block/blk-mq.c b/block/blk-mq.c +index c207fa9870eb..ac71b0455e9f 100644 +--- a/block/blk-mq.c ++++ b/block/blk-mq.c +@@ -92,7 +92,7 @@ EXPORT_SYMBOL_GPL(blk_mq_freeze_queue_start); + + static void blk_mq_freeze_queue_wait(struct request_queue *q) + { +- wait_event(q->mq_freeze_wq, percpu_ref_is_zero(&q->q_usage_counter)); ++ swait_event(q->mq_freeze_wq, percpu_ref_is_zero(&q->q_usage_counter)); + } + + /* +@@ -130,7 +130,7 @@ void blk_mq_unfreeze_queue(struct request_queue *q) + WARN_ON_ONCE(freeze_depth < 0); + if (!freeze_depth) { + percpu_ref_reinit(&q->q_usage_counter); +- wake_up_all(&q->mq_freeze_wq); ++ swake_up_all(&q->mq_freeze_wq); + } + } + EXPORT_SYMBOL_GPL(blk_mq_unfreeze_queue); +@@ -149,7 +149,7 @@ void blk_mq_wake_waiters(struct request_queue *q) + * dying, we need to ensure that processes currently waiting on + * the queue are notified as well. + */ +- wake_up_all(&q->mq_freeze_wq); ++ swake_up_all(&q->mq_freeze_wq); + } + + bool blk_mq_can_queue(struct blk_mq_hw_ctx *hctx) +@@ -197,6 +197,9 @@ static void blk_mq_rq_ctx_init(struct request_queue *q, struct blk_mq_ctx *ctx, + rq->resid_len = 0; + rq->sense = NULL; + ++#ifdef CONFIG_PREEMPT_RT_FULL ++ INIT_WORK(&rq->work, __blk_mq_complete_request_remote_work); ++#endif + INIT_LIST_HEAD(&rq->timeout_list); + rq->timeout = 0; + +@@ -379,6 +382,17 @@ void blk_mq_end_request(struct request *rq, int error) + } + EXPORT_SYMBOL(blk_mq_end_request); + ++#ifdef CONFIG_PREEMPT_RT_FULL ++ ++void __blk_mq_complete_request_remote_work(struct work_struct *work) ++{ ++ struct request *rq = container_of(work, struct request, work); ++ ++ rq->q->softirq_done_fn(rq); ++} ++ ++#else ++ + static void __blk_mq_complete_request_remote(void *data) + { + struct request *rq = data; +@@ -386,6 +400,8 @@ static void __blk_mq_complete_request_remote(void *data) + rq->q->softirq_done_fn(rq); + } + ++#endif ++ + static void blk_mq_ipi_complete_request(struct request *rq) + { + struct blk_mq_ctx *ctx = rq->mq_ctx; +@@ -397,19 +413,23 @@ static void blk_mq_ipi_complete_request(struct request *rq) + return; + } + +- cpu = get_cpu(); ++ cpu = get_cpu_light(); + if (!test_bit(QUEUE_FLAG_SAME_FORCE, &rq->q->queue_flags)) + shared = cpus_share_cache(cpu, ctx->cpu); + + if (cpu != ctx->cpu && !shared && cpu_online(ctx->cpu)) { ++#ifdef CONFIG_PREEMPT_RT_FULL ++ schedule_work_on(ctx->cpu, &rq->work); ++#else + rq->csd.func = __blk_mq_complete_request_remote; + rq->csd.info = rq; + rq->csd.flags = 0; + smp_call_function_single_async(ctx->cpu, &rq->csd); ++#endif + } else { + rq->q->softirq_done_fn(rq); + } +- put_cpu(); ++ put_cpu_light(); + } + + static void __blk_mq_complete_request(struct request *rq) +@@ -938,14 +958,14 @@ void blk_mq_run_hw_queue(struct blk_mq_hw_ctx *hctx, bool async) + return; + + if (!async) { +- int cpu = get_cpu(); ++ int cpu = get_cpu_light(); + if (cpumask_test_cpu(cpu, hctx->cpumask)) { + __blk_mq_run_hw_queue(hctx); +- put_cpu(); ++ put_cpu_light(); + return; + } + +- put_cpu(); ++ put_cpu_light(); + } + + kblockd_schedule_delayed_work_on(blk_mq_hctx_next_cpu(hctx), +@@ -1667,7 +1687,7 @@ static int blk_mq_hctx_notify(void *data, unsigned long action, + { + struct blk_mq_hw_ctx *hctx = data; + +- if (action == CPU_DEAD || action == CPU_DEAD_FROZEN) ++ if (action == CPU_POST_DEAD) + return blk_mq_hctx_cpu_offline(hctx, cpu); + + /* +diff --git a/block/blk-mq.h b/block/blk-mq.h +index 9087b11037b7..0401d76e827c 100644 +--- a/block/blk-mq.h ++++ b/block/blk-mq.h +@@ -86,12 +86,12 @@ static inline struct blk_mq_ctx *__blk_mq_get_ctx(struct request_queue *q, + */ + static inline struct blk_mq_ctx *blk_mq_get_ctx(struct request_queue *q) + { +- return __blk_mq_get_ctx(q, get_cpu()); ++ return __blk_mq_get_ctx(q, get_cpu_light()); + } + + static inline void blk_mq_put_ctx(struct blk_mq_ctx *ctx) + { +- put_cpu(); ++ put_cpu_light(); + } + + struct blk_mq_alloc_data { +diff --git a/block/blk-softirq.c b/block/blk-softirq.c +index 53b1737e978d..81c3c0a62edf 100644 +--- a/block/blk-softirq.c ++++ b/block/blk-softirq.c +@@ -51,6 +51,7 @@ static void trigger_softirq(void *data) + raise_softirq_irqoff(BLOCK_SOFTIRQ); + + local_irq_restore(flags); ++ preempt_check_resched_rt(); + } + + /* +@@ -93,6 +94,7 @@ static int blk_cpu_notify(struct notifier_block *self, unsigned long action, + this_cpu_ptr(&blk_cpu_done)); + raise_softirq_irqoff(BLOCK_SOFTIRQ); + local_irq_enable(); ++ preempt_check_resched_rt(); + } + + return NOTIFY_OK; +@@ -150,6 +152,7 @@ void __blk_complete_request(struct request *req) + goto do_local; + + local_irq_restore(flags); ++ preempt_check_resched_rt(); + } + + /** +diff --git a/block/bounce.c b/block/bounce.c +index 1cb5dd3a5da1..2f1ec8a67cbe 100644 +--- a/block/bounce.c ++++ b/block/bounce.c +@@ -55,11 +55,11 @@ static void bounce_copy_vec(struct bio_vec *to, unsigned char *vfrom) + unsigned long flags; + unsigned char *vto; + +- local_irq_save(flags); ++ local_irq_save_nort(flags); + vto = kmap_atomic(to->bv_page); + memcpy(vto + to->bv_offset, vfrom, to->bv_len); + kunmap_atomic(vto); +- local_irq_restore(flags); ++ local_irq_restore_nort(flags); + } + + #else /* CONFIG_HIGHMEM */ +diff --git a/crypto/algapi.c b/crypto/algapi.c +index df939b54b09f..efe5e06adcf7 100644 +--- a/crypto/algapi.c ++++ b/crypto/algapi.c +@@ -718,13 +718,13 @@ EXPORT_SYMBOL_GPL(crypto_spawn_tfm2); + + int crypto_register_notifier(struct notifier_block *nb) + { +- return blocking_notifier_chain_register(&crypto_chain, nb); ++ return srcu_notifier_chain_register(&crypto_chain, nb); + } + EXPORT_SYMBOL_GPL(crypto_register_notifier); + + int crypto_unregister_notifier(struct notifier_block *nb) + { +- return blocking_notifier_chain_unregister(&crypto_chain, nb); ++ return srcu_notifier_chain_unregister(&crypto_chain, nb); + } + EXPORT_SYMBOL_GPL(crypto_unregister_notifier); + +diff --git a/crypto/api.c b/crypto/api.c +index bbc147cb5dec..bc1a848f02ec 100644 +--- a/crypto/api.c ++++ b/crypto/api.c +@@ -31,7 +31,7 @@ EXPORT_SYMBOL_GPL(crypto_alg_list); + DECLARE_RWSEM(crypto_alg_sem); + EXPORT_SYMBOL_GPL(crypto_alg_sem); + +-BLOCKING_NOTIFIER_HEAD(crypto_chain); ++SRCU_NOTIFIER_HEAD(crypto_chain); + EXPORT_SYMBOL_GPL(crypto_chain); + + static struct crypto_alg *crypto_larval_wait(struct crypto_alg *alg); +@@ -236,10 +236,10 @@ int crypto_probing_notify(unsigned long val, void *v) + { + int ok; + +- ok = blocking_notifier_call_chain(&crypto_chain, val, v); ++ ok = srcu_notifier_call_chain(&crypto_chain, val, v); + if (ok == NOTIFY_DONE) { + request_module("cryptomgr"); +- ok = blocking_notifier_call_chain(&crypto_chain, val, v); ++ ok = srcu_notifier_call_chain(&crypto_chain, val, v); + } + + return ok; +diff --git a/crypto/internal.h b/crypto/internal.h +index 7eefcdb00227..0ecc7f5a2f40 100644 +--- a/crypto/internal.h ++++ b/crypto/internal.h +@@ -47,7 +47,7 @@ struct crypto_larval { + + extern struct list_head crypto_alg_list; + extern struct rw_semaphore crypto_alg_sem; +-extern struct blocking_notifier_head crypto_chain; ++extern struct srcu_notifier_head crypto_chain; + + #ifdef CONFIG_PROC_FS + void __init crypto_init_proc(void); +@@ -146,7 +146,7 @@ static inline int crypto_is_moribund(struct crypto_alg *alg) + + static inline void crypto_notify(unsigned long val, void *v) + { +- blocking_notifier_call_chain(&crypto_chain, val, v); ++ srcu_notifier_call_chain(&crypto_chain, val, v); + } + + #endif /* _CRYPTO_INTERNAL_H */ +diff --git a/drivers/acpi/acpica/acglobal.h b/drivers/acpi/acpica/acglobal.h +index fded776236e2..bda523219d50 100644 +--- a/drivers/acpi/acpica/acglobal.h ++++ b/drivers/acpi/acpica/acglobal.h +@@ -116,7 +116,7 @@ ACPI_GLOBAL(u8, acpi_gbl_global_lock_pending); + * interrupt level + */ + ACPI_GLOBAL(acpi_spinlock, acpi_gbl_gpe_lock); /* For GPE data structs and registers */ +-ACPI_GLOBAL(acpi_spinlock, acpi_gbl_hardware_lock); /* For ACPI H/W except GPE registers */ ++ACPI_GLOBAL(acpi_raw_spinlock, acpi_gbl_hardware_lock); /* For ACPI H/W except GPE registers */ + ACPI_GLOBAL(acpi_spinlock, acpi_gbl_reference_count_lock); + + /* Mutex for _OSI support */ +diff --git a/drivers/acpi/acpica/hwregs.c b/drivers/acpi/acpica/hwregs.c +index 3b7fb99362b6..696bf8e62afb 100644 +--- a/drivers/acpi/acpica/hwregs.c ++++ b/drivers/acpi/acpica/hwregs.c +@@ -363,14 +363,14 @@ acpi_status acpi_hw_clear_acpi_status(void) + ACPI_BITMASK_ALL_FIXED_STATUS, + ACPI_FORMAT_UINT64(acpi_gbl_xpm1a_status.address))); + +- lock_flags = acpi_os_acquire_lock(acpi_gbl_hardware_lock); ++ raw_spin_lock_irqsave(acpi_gbl_hardware_lock, lock_flags); + + /* Clear the fixed events in PM1 A/B */ + + status = acpi_hw_register_write(ACPI_REGISTER_PM1_STATUS, + ACPI_BITMASK_ALL_FIXED_STATUS); + +- acpi_os_release_lock(acpi_gbl_hardware_lock, lock_flags); ++ raw_spin_unlock_irqrestore(acpi_gbl_hardware_lock, lock_flags); + + if (ACPI_FAILURE(status)) { + goto exit; +diff --git a/drivers/acpi/acpica/hwxface.c b/drivers/acpi/acpica/hwxface.c +index 98c26ff39409..6e236f2ea791 100644 +--- a/drivers/acpi/acpica/hwxface.c ++++ b/drivers/acpi/acpica/hwxface.c +@@ -373,7 +373,7 @@ acpi_status acpi_write_bit_register(u32 register_id, u32 value) + return_ACPI_STATUS(AE_BAD_PARAMETER); + } + +- lock_flags = acpi_os_acquire_lock(acpi_gbl_hardware_lock); ++ raw_spin_lock_irqsave(acpi_gbl_hardware_lock, lock_flags); + + /* + * At this point, we know that the parent register is one of the +@@ -434,7 +434,7 @@ acpi_status acpi_write_bit_register(u32 register_id, u32 value) + + unlock_and_exit: + +- acpi_os_release_lock(acpi_gbl_hardware_lock, lock_flags); ++ raw_spin_unlock_irqrestore(acpi_gbl_hardware_lock, lock_flags); + return_ACPI_STATUS(status); + } + +diff --git a/drivers/acpi/acpica/utmutex.c b/drivers/acpi/acpica/utmutex.c +index 15073375bd00..357e7ca5a587 100644 +--- a/drivers/acpi/acpica/utmutex.c ++++ b/drivers/acpi/acpica/utmutex.c +@@ -88,7 +88,7 @@ acpi_status acpi_ut_mutex_initialize(void) + return_ACPI_STATUS (status); + } + +- status = acpi_os_create_lock (&acpi_gbl_hardware_lock); ++ status = acpi_os_create_raw_lock (&acpi_gbl_hardware_lock); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } +@@ -145,7 +145,7 @@ void acpi_ut_mutex_terminate(void) + /* Delete the spinlocks */ + + acpi_os_delete_lock(acpi_gbl_gpe_lock); +- acpi_os_delete_lock(acpi_gbl_hardware_lock); ++ acpi_os_delete_raw_lock(acpi_gbl_hardware_lock); + acpi_os_delete_lock(acpi_gbl_reference_count_lock); + + /* Delete the reader/writer lock */ +diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c +index 051b6158d1b7..7ad293bef6ed 100644 +--- a/drivers/ata/libata-sff.c ++++ b/drivers/ata/libata-sff.c +@@ -678,9 +678,9 @@ unsigned int ata_sff_data_xfer_noirq(struct ata_device *dev, unsigned char *buf, + unsigned long flags; + unsigned int consumed; + +- local_irq_save(flags); ++ local_irq_save_nort(flags); + consumed = ata_sff_data_xfer32(dev, buf, buflen, rw); +- local_irq_restore(flags); ++ local_irq_restore_nort(flags); + + return consumed; + } +@@ -719,7 +719,7 @@ static void ata_pio_sector(struct ata_queued_cmd *qc) + unsigned long flags; + + /* FIXME: use a bounce buffer */ +- local_irq_save(flags); ++ local_irq_save_nort(flags); + buf = kmap_atomic(page); + + /* do the actual data transfer */ +@@ -727,7 +727,7 @@ static void ata_pio_sector(struct ata_queued_cmd *qc) + do_write); + + kunmap_atomic(buf); +- local_irq_restore(flags); ++ local_irq_restore_nort(flags); + } else { + buf = page_address(page); + ap->ops->sff_data_xfer(qc->dev, buf + offset, qc->sect_size, +@@ -864,7 +864,7 @@ static int __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes) + unsigned long flags; + + /* FIXME: use bounce buffer */ +- local_irq_save(flags); ++ local_irq_save_nort(flags); + buf = kmap_atomic(page); + + /* do the actual data transfer */ +@@ -872,7 +872,7 @@ static int __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes) + count, rw); + + kunmap_atomic(buf); +- local_irq_restore(flags); ++ local_irq_restore_nort(flags); + } else { + buf = page_address(page); + consumed = ap->ops->sff_data_xfer(dev, buf + offset, +diff --git a/drivers/block/zram/zcomp.c b/drivers/block/zram/zcomp.c +index 4b5cd3a7b2b6..fa8329ad79fd 100644 +--- a/drivers/block/zram/zcomp.c ++++ b/drivers/block/zram/zcomp.c +@@ -118,12 +118,19 @@ ssize_t zcomp_available_show(const char *comp, char *buf) + + struct zcomp_strm *zcomp_stream_get(struct zcomp *comp) + { +- return *get_cpu_ptr(comp->stream); ++ struct zcomp_strm *zstrm; ++ ++ zstrm = *this_cpu_ptr(comp->stream); ++ spin_lock(&zstrm->zcomp_lock); ++ return zstrm; + } + + void zcomp_stream_put(struct zcomp *comp) + { +- put_cpu_ptr(comp->stream); ++ struct zcomp_strm *zstrm; ++ ++ zstrm = *this_cpu_ptr(comp->stream); ++ spin_unlock(&zstrm->zcomp_lock); + } + + int zcomp_compress(struct zcomp_strm *zstrm, +@@ -174,6 +181,7 @@ static int __zcomp_cpu_notifier(struct zcomp *comp, + pr_err("Can't allocate a compression stream\n"); + return NOTIFY_BAD; + } ++ spin_lock_init(&zstrm->zcomp_lock); + *per_cpu_ptr(comp->stream, cpu) = zstrm; + break; + case CPU_DEAD: +diff --git a/drivers/block/zram/zcomp.h b/drivers/block/zram/zcomp.h +index 478cac2ed465..f7a6efdc3285 100644 +--- a/drivers/block/zram/zcomp.h ++++ b/drivers/block/zram/zcomp.h +@@ -14,6 +14,7 @@ struct zcomp_strm { + /* compression/decompression buffer */ + void *buffer; + struct crypto_comp *tfm; ++ spinlock_t zcomp_lock; + }; + + /* dynamic per-device compression frontend */ +diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c +index 04365b17ee67..b4a0577a4dbc 100644 +--- a/drivers/block/zram/zram_drv.c ++++ b/drivers/block/zram/zram_drv.c +@@ -519,6 +519,8 @@ static struct zram_meta *zram_meta_alloc(char *pool_name, u64 disksize) + goto out_error; + } + ++ zram_meta_init_table_locks(meta, disksize); ++ + return meta; + + out_error: +@@ -566,28 +568,28 @@ static int zram_decompress_page(struct zram *zram, char *mem, u32 index) + struct zram_meta *meta = zram->meta; + unsigned long handle; + unsigned int size; ++ struct zcomp_strm *zstrm; + +- bit_spin_lock(ZRAM_ACCESS, &meta->table[index].value); ++ zram_lock_table(&meta->table[index]); + handle = meta->table[index].handle; + size = zram_get_obj_size(meta, index); + + if (!handle || zram_test_flag(meta, index, ZRAM_ZERO)) { +- bit_spin_unlock(ZRAM_ACCESS, &meta->table[index].value); ++ zram_unlock_table(&meta->table[index]); + clear_page(mem); + return 0; + } + ++ zstrm = zcomp_stream_get(zram->comp); + cmem = zs_map_object(meta->mem_pool, handle, ZS_MM_RO); + if (size == PAGE_SIZE) { + copy_page(mem, cmem); + } else { +- struct zcomp_strm *zstrm = zcomp_stream_get(zram->comp); +- + ret = zcomp_decompress(zstrm, cmem, size, mem); +- zcomp_stream_put(zram->comp); + } + zs_unmap_object(meta->mem_pool, handle); +- bit_spin_unlock(ZRAM_ACCESS, &meta->table[index].value); ++ zcomp_stream_put(zram->comp); ++ zram_unlock_table(&meta->table[index]); + + /* Should NEVER happen. Return bio error if it does. */ + if (unlikely(ret)) { +@@ -607,14 +609,14 @@ static int zram_bvec_read(struct zram *zram, struct bio_vec *bvec, + struct zram_meta *meta = zram->meta; + page = bvec->bv_page; + +- bit_spin_lock(ZRAM_ACCESS, &meta->table[index].value); ++ zram_lock_table(&meta->table[index]); + if (unlikely(!meta->table[index].handle) || + zram_test_flag(meta, index, ZRAM_ZERO)) { +- bit_spin_unlock(ZRAM_ACCESS, &meta->table[index].value); ++ zram_unlock_table(&meta->table[index]); + handle_zero_page(bvec); + return 0; + } +- bit_spin_unlock(ZRAM_ACCESS, &meta->table[index].value); ++ zram_unlock_table(&meta->table[index]); + + if (is_partial_io(bvec)) + /* Use a temporary buffer to decompress the page */ +@@ -691,10 +693,10 @@ static int zram_bvec_write(struct zram *zram, struct bio_vec *bvec, u32 index, + if (user_mem) + kunmap_atomic(user_mem); + /* Free memory associated with this sector now. */ +- bit_spin_lock(ZRAM_ACCESS, &meta->table[index].value); ++ zram_lock_table(&meta->table[index]); + zram_free_page(zram, index); + zram_set_flag(meta, index, ZRAM_ZERO); +- bit_spin_unlock(ZRAM_ACCESS, &meta->table[index].value); ++ zram_unlock_table(&meta->table[index]); + + atomic64_inc(&zram->stats.zero_pages); + ret = 0; +@@ -785,12 +787,12 @@ static int zram_bvec_write(struct zram *zram, struct bio_vec *bvec, u32 index, + * Free memory associated with this sector + * before overwriting unused sectors. + */ +- bit_spin_lock(ZRAM_ACCESS, &meta->table[index].value); ++ zram_lock_table(&meta->table[index]); + zram_free_page(zram, index); + + meta->table[index].handle = handle; + zram_set_obj_size(meta, index, clen); +- bit_spin_unlock(ZRAM_ACCESS, &meta->table[index].value); ++ zram_unlock_table(&meta->table[index]); + + /* Update stats */ + atomic64_add(clen, &zram->stats.compr_data_size); +@@ -833,9 +835,9 @@ static void zram_bio_discard(struct zram *zram, u32 index, + } + + while (n >= PAGE_SIZE) { +- bit_spin_lock(ZRAM_ACCESS, &meta->table[index].value); ++ zram_lock_table(&meta->table[index]); + zram_free_page(zram, index); +- bit_spin_unlock(ZRAM_ACCESS, &meta->table[index].value); ++ zram_unlock_table(&meta->table[index]); + atomic64_inc(&zram->stats.notify_free); + index++; + n -= PAGE_SIZE; +@@ -964,9 +966,9 @@ static void zram_slot_free_notify(struct block_device *bdev, + zram = bdev->bd_disk->private_data; + meta = zram->meta; + +- bit_spin_lock(ZRAM_ACCESS, &meta->table[index].value); ++ zram_lock_table(&meta->table[index]); + zram_free_page(zram, index); +- bit_spin_unlock(ZRAM_ACCESS, &meta->table[index].value); ++ zram_unlock_table(&meta->table[index]); + atomic64_inc(&zram->stats.notify_free); + } + +diff --git a/drivers/block/zram/zram_drv.h b/drivers/block/zram/zram_drv.h +index 74fcf10da374..fd4020c99b9e 100644 +--- a/drivers/block/zram/zram_drv.h ++++ b/drivers/block/zram/zram_drv.h +@@ -73,6 +73,9 @@ enum zram_pageflags { + struct zram_table_entry { + unsigned long handle; + unsigned long value; ++#ifdef CONFIG_PREEMPT_RT_BASE ++ spinlock_t lock; ++#endif + }; + + struct zram_stats { +@@ -120,4 +123,42 @@ struct zram { + */ + bool claim; /* Protected by bdev->bd_mutex */ + }; ++ ++#ifndef CONFIG_PREEMPT_RT_BASE ++static inline void zram_lock_table(struct zram_table_entry *table) ++{ ++ bit_spin_lock(ZRAM_ACCESS, &table->value); ++} ++ ++static inline void zram_unlock_table(struct zram_table_entry *table) ++{ ++ bit_spin_unlock(ZRAM_ACCESS, &table->value); ++} ++ ++static inline void zram_meta_init_table_locks(struct zram_meta *meta, u64 disksize) { } ++#else /* CONFIG_PREEMPT_RT_BASE */ ++static inline void zram_lock_table(struct zram_table_entry *table) ++{ ++ spin_lock(&table->lock); ++ __set_bit(ZRAM_ACCESS, &table->value); ++} ++ ++static inline void zram_unlock_table(struct zram_table_entry *table) ++{ ++ __clear_bit(ZRAM_ACCESS, &table->value); ++ spin_unlock(&table->lock); ++} ++ ++static inline void zram_meta_init_table_locks(struct zram_meta *meta, u64 disksize) ++{ ++ size_t num_pages = disksize >> PAGE_SHIFT; ++ size_t index; ++ ++ for (index = 0; index < num_pages; index++) { ++ spinlock_t *lock = &meta->table[index].lock; ++ spin_lock_init(lock); ++ } ++} ++#endif /* CONFIG_PREEMPT_RT_BASE */ ++ + #endif +diff --git a/drivers/char/random.c b/drivers/char/random.c +index 3efb3bf0ab83..c894d2e266f3 100644 +--- a/drivers/char/random.c ++++ b/drivers/char/random.c +@@ -1028,8 +1028,6 @@ static void add_timer_randomness(struct timer_rand_state *state, unsigned num) + } sample; + long delta, delta2, delta3; + +- preempt_disable(); +- + sample.jiffies = jiffies; + sample.cycles = random_get_entropy(); + sample.num = num; +@@ -1070,7 +1068,6 @@ static void add_timer_randomness(struct timer_rand_state *state, unsigned num) + */ + credit_entropy_bits(r, min_t(int, fls(delta>>1), 11)); + } +- preempt_enable(); + } + + void add_input_randomness(unsigned int type, unsigned int code, +@@ -1123,28 +1120,27 @@ static __u32 get_reg(struct fast_pool *f, struct pt_regs *regs) + return *(ptr + f->reg_idx++); + } + +-void add_interrupt_randomness(int irq, int irq_flags) ++void add_interrupt_randomness(int irq, int irq_flags, __u64 ip) + { + struct entropy_store *r; + struct fast_pool *fast_pool = this_cpu_ptr(&irq_randomness); +- struct pt_regs *regs = get_irq_regs(); + unsigned long now = jiffies; + cycles_t cycles = random_get_entropy(); + __u32 c_high, j_high; +- __u64 ip; + unsigned long seed; + int credit = 0; + + if (cycles == 0) +- cycles = get_reg(fast_pool, regs); ++ cycles = get_reg(fast_pool, NULL); + c_high = (sizeof(cycles) > 4) ? cycles >> 32 : 0; + j_high = (sizeof(now) > 4) ? now >> 32 : 0; + fast_pool->pool[0] ^= cycles ^ j_high ^ irq; + fast_pool->pool[1] ^= now ^ c_high; +- ip = regs ? instruction_pointer(regs) : _RET_IP_; ++ if (!ip) ++ ip = _RET_IP_; + fast_pool->pool[2] ^= ip; + fast_pool->pool[3] ^= (sizeof(ip) > 4) ? ip >> 32 : +- get_reg(fast_pool, regs); ++ get_reg(fast_pool, NULL); + + fast_mix(fast_pool); + add_interrupt_bench(cycles); +diff --git a/drivers/clocksource/tcb_clksrc.c b/drivers/clocksource/tcb_clksrc.c +index 4da2af9694a2..5b6f57f500b8 100644 +--- a/drivers/clocksource/tcb_clksrc.c ++++ b/drivers/clocksource/tcb_clksrc.c +@@ -23,8 +23,7 @@ + * this 32 bit free-running counter. the second channel is not used. + * + * - The third channel may be used to provide a 16-bit clockevent +- * source, used in either periodic or oneshot mode. This runs +- * at 32 KiHZ, and can handle delays of up to two seconds. ++ * source, used in either periodic or oneshot mode. + * + * A boot clocksource and clockevent source are also currently needed, + * unless the relevant platforms (ARM/AT91, AVR32/AT32) are changed so +@@ -74,6 +73,8 @@ static struct clocksource clksrc = { + struct tc_clkevt_device { + struct clock_event_device clkevt; + struct clk *clk; ++ bool clk_enabled; ++ u32 freq; + void __iomem *regs; + }; + +@@ -82,15 +83,26 @@ static struct tc_clkevt_device *to_tc_clkevt(struct clock_event_device *clkevt) + return container_of(clkevt, struct tc_clkevt_device, clkevt); + } + +-/* For now, we always use the 32K clock ... this optimizes for NO_HZ, +- * because using one of the divided clocks would usually mean the +- * tick rate can never be less than several dozen Hz (vs 0.5 Hz). +- * +- * A divided clock could be good for high resolution timers, since +- * 30.5 usec resolution can seem "low". +- */ + static u32 timer_clock; + ++static void tc_clk_disable(struct clock_event_device *d) ++{ ++ struct tc_clkevt_device *tcd = to_tc_clkevt(d); ++ ++ clk_disable(tcd->clk); ++ tcd->clk_enabled = false; ++} ++ ++static void tc_clk_enable(struct clock_event_device *d) ++{ ++ struct tc_clkevt_device *tcd = to_tc_clkevt(d); ++ ++ if (tcd->clk_enabled) ++ return; ++ clk_enable(tcd->clk); ++ tcd->clk_enabled = true; ++} ++ + static int tc_shutdown(struct clock_event_device *d) + { + struct tc_clkevt_device *tcd = to_tc_clkevt(d); +@@ -98,8 +110,14 @@ static int tc_shutdown(struct clock_event_device *d) + + __raw_writel(0xff, regs + ATMEL_TC_REG(2, IDR)); + __raw_writel(ATMEL_TC_CLKDIS, regs + ATMEL_TC_REG(2, CCR)); ++ return 0; ++} ++ ++static int tc_shutdown_clk_off(struct clock_event_device *d) ++{ ++ tc_shutdown(d); + if (!clockevent_state_detached(d)) +- clk_disable(tcd->clk); ++ tc_clk_disable(d); + + return 0; + } +@@ -112,9 +130,9 @@ static int tc_set_oneshot(struct clock_event_device *d) + if (clockevent_state_oneshot(d) || clockevent_state_periodic(d)) + tc_shutdown(d); + +- clk_enable(tcd->clk); ++ tc_clk_enable(d); + +- /* slow clock, count up to RC, then irq and stop */ ++ /* count up to RC, then irq and stop */ + __raw_writel(timer_clock | ATMEL_TC_CPCSTOP | ATMEL_TC_WAVE | + ATMEL_TC_WAVESEL_UP_AUTO, regs + ATMEL_TC_REG(2, CMR)); + __raw_writel(ATMEL_TC_CPCS, regs + ATMEL_TC_REG(2, IER)); +@@ -134,12 +152,12 @@ static int tc_set_periodic(struct clock_event_device *d) + /* By not making the gentime core emulate periodic mode on top + * of oneshot, we get lower overhead and improved accuracy. + */ +- clk_enable(tcd->clk); ++ tc_clk_enable(d); + +- /* slow clock, count up to RC, then irq and restart */ ++ /* count up to RC, then irq and restart */ + __raw_writel(timer_clock | ATMEL_TC_WAVE | ATMEL_TC_WAVESEL_UP_AUTO, + regs + ATMEL_TC_REG(2, CMR)); +- __raw_writel((32768 + HZ / 2) / HZ, tcaddr + ATMEL_TC_REG(2, RC)); ++ __raw_writel((tcd->freq + HZ / 2) / HZ, tcaddr + ATMEL_TC_REG(2, RC)); + + /* Enable clock and interrupts on RC compare */ + __raw_writel(ATMEL_TC_CPCS, regs + ATMEL_TC_REG(2, IER)); +@@ -166,9 +184,13 @@ static struct tc_clkevt_device clkevt = { + .features = CLOCK_EVT_FEAT_PERIODIC | + CLOCK_EVT_FEAT_ONESHOT, + /* Should be lower than at91rm9200's system timer */ ++#ifdef CONFIG_ATMEL_TCB_CLKSRC_USE_SLOW_CLOCK + .rating = 125, ++#else ++ .rating = 200, ++#endif + .set_next_event = tc_next_event, +- .set_state_shutdown = tc_shutdown, ++ .set_state_shutdown = tc_shutdown_clk_off, + .set_state_periodic = tc_set_periodic, + .set_state_oneshot = tc_set_oneshot, + }, +@@ -188,8 +210,9 @@ static irqreturn_t ch2_irq(int irq, void *handle) + return IRQ_NONE; + } + +-static int __init setup_clkevents(struct atmel_tc *tc, int clk32k_divisor_idx) ++static int __init setup_clkevents(struct atmel_tc *tc, int divisor_idx) + { ++ unsigned divisor = atmel_tc_divisors[divisor_idx]; + int ret; + struct clk *t2_clk = tc->clk[2]; + int irq = tc->irq[2]; +@@ -210,7 +233,11 @@ static int __init setup_clkevents(struct atmel_tc *tc, int clk32k_divisor_idx) + clkevt.regs = tc->regs; + clkevt.clk = t2_clk; + +- timer_clock = clk32k_divisor_idx; ++ timer_clock = divisor_idx; ++ if (!divisor) ++ clkevt.freq = 32768; ++ else ++ clkevt.freq = clk_get_rate(t2_clk) / divisor; + + clkevt.clkevt.cpumask = cpumask_of(0); + +@@ -221,7 +248,7 @@ static int __init setup_clkevents(struct atmel_tc *tc, int clk32k_divisor_idx) + return ret; + } + +- clockevents_config_and_register(&clkevt.clkevt, 32768, 1, 0xffff); ++ clockevents_config_and_register(&clkevt.clkevt, clkevt.freq, 1, 0xffff); + + return ret; + } +@@ -358,7 +385,11 @@ static int __init tcb_clksrc_init(void) + goto err_disable_t1; + + /* channel 2: periodic and oneshot timer support */ ++#ifdef CONFIG_ATMEL_TCB_CLKSRC_USE_SLOW_CLOCK + ret = setup_clkevents(tc, clk32k_divisor_idx); ++#else ++ ret = setup_clkevents(tc, best_divisor_idx); ++#endif + if (ret) + goto err_unregister_clksrc; + +diff --git a/drivers/clocksource/timer-atmel-pit.c b/drivers/clocksource/timer-atmel-pit.c +index 7f0f5b26d8c5..1553f19e73e7 100644 +--- a/drivers/clocksource/timer-atmel-pit.c ++++ b/drivers/clocksource/timer-atmel-pit.c +@@ -46,6 +46,7 @@ struct pit_data { + u32 cycle; + u32 cnt; + unsigned int irq; ++ bool irq_requested; + struct clk *mck; + }; + +@@ -96,15 +97,29 @@ static int pit_clkevt_shutdown(struct clock_event_device *dev) + + /* disable irq, leaving the clocksource active */ + pit_write(data->base, AT91_PIT_MR, (data->cycle - 1) | AT91_PIT_PITEN); ++ if (data->irq_requested) { ++ free_irq(data->irq, data); ++ data->irq_requested = false; ++ } + return 0; + } + ++static irqreturn_t at91sam926x_pit_interrupt(int irq, void *dev_id); + /* + * Clockevent device: interrupts every 1/HZ (== pit_cycles * MCK/16) + */ + static int pit_clkevt_set_periodic(struct clock_event_device *dev) + { + struct pit_data *data = clkevt_to_pit_data(dev); ++ int ret; ++ ++ ret = request_irq(data->irq, at91sam926x_pit_interrupt, ++ IRQF_SHARED | IRQF_TIMER | IRQF_IRQPOLL, ++ "at91_tick", data); ++ if (ret) ++ panic(pr_fmt("Unable to setup IRQ\n")); ++ ++ data->irq_requested = true; + + /* update clocksource counter */ + data->cnt += data->cycle * PIT_PICNT(pit_read(data->base, AT91_PIT_PIVR)); +@@ -211,15 +226,6 @@ static int __init at91sam926x_pit_common_init(struct pit_data *data) + return ret; + } + +- /* Set up irq handler */ +- ret = request_irq(data->irq, at91sam926x_pit_interrupt, +- IRQF_SHARED | IRQF_TIMER | IRQF_IRQPOLL, +- "at91_tick", data); +- if (ret) { +- pr_err("Unable to setup IRQ\n"); +- return ret; +- } +- + /* Set up and register clockevents */ + data->clkevt.name = "pit"; + data->clkevt.features = CLOCK_EVT_FEAT_PERIODIC; +diff --git a/drivers/clocksource/timer-atmel-st.c b/drivers/clocksource/timer-atmel-st.c +index e90ab5b63a90..9e124087c55f 100644 +--- a/drivers/clocksource/timer-atmel-st.c ++++ b/drivers/clocksource/timer-atmel-st.c +@@ -115,18 +115,29 @@ static void clkdev32k_disable_and_flush_irq(void) + last_crtr = read_CRTR(); + } + ++static int atmel_st_irq; ++ + static int clkevt32k_shutdown(struct clock_event_device *evt) + { + clkdev32k_disable_and_flush_irq(); + irqmask = 0; + regmap_write(regmap_st, AT91_ST_IER, irqmask); ++ free_irq(atmel_st_irq, regmap_st); + return 0; + } + + static int clkevt32k_set_oneshot(struct clock_event_device *dev) + { ++ int ret; ++ + clkdev32k_disable_and_flush_irq(); + ++ ret = request_irq(atmel_st_irq, at91rm9200_timer_interrupt, ++ IRQF_SHARED | IRQF_TIMER | IRQF_IRQPOLL, ++ "at91_tick", regmap_st); ++ if (ret) ++ panic(pr_fmt("Unable to setup IRQ\n")); ++ + /* + * ALM for oneshot irqs, set by next_event() + * before 32 seconds have passed. +@@ -139,8 +150,16 @@ static int clkevt32k_set_oneshot(struct clock_event_device *dev) + + static int clkevt32k_set_periodic(struct clock_event_device *dev) + { ++ int ret; ++ + clkdev32k_disable_and_flush_irq(); + ++ ret = request_irq(atmel_st_irq, at91rm9200_timer_interrupt, ++ IRQF_SHARED | IRQF_TIMER | IRQF_IRQPOLL, ++ "at91_tick", regmap_st); ++ if (ret) ++ panic(pr_fmt("Unable to setup IRQ\n")); ++ + /* PIT for periodic irqs; fixed rate of 1/HZ */ + irqmask = AT91_ST_PITS; + regmap_write(regmap_st, AT91_ST_PIMR, timer_latch); +@@ -198,7 +217,7 @@ static int __init atmel_st_timer_init(struct device_node *node) + { + struct clk *sclk; + unsigned int sclk_rate, val; +- int irq, ret; ++ int ret; + + regmap_st = syscon_node_to_regmap(node); + if (IS_ERR(regmap_st)) { +@@ -212,21 +231,12 @@ static int __init atmel_st_timer_init(struct device_node *node) + regmap_read(regmap_st, AT91_ST_SR, &val); + + /* Get the interrupts property */ +- irq = irq_of_parse_and_map(node, 0); +- if (!irq) { ++ atmel_st_irq = irq_of_parse_and_map(node, 0); ++ if (!atmel_st_irq) { + pr_err("Unable to get IRQ from DT\n"); + return -EINVAL; + } + +- /* Make IRQs happen for the system timer */ +- ret = request_irq(irq, at91rm9200_timer_interrupt, +- IRQF_SHARED | IRQF_TIMER | IRQF_IRQPOLL, +- "at91_tick", regmap_st); +- if (ret) { +- pr_err("Unable to setup IRQ\n"); +- return ret; +- } +- + sclk = of_clk_get(node, 0); + if (IS_ERR(sclk)) { + pr_err("Unable to get slow clock\n"); +diff --git a/drivers/connector/cn_proc.c b/drivers/connector/cn_proc.c +index a782ce87715c..19d265948526 100644 +--- a/drivers/connector/cn_proc.c ++++ b/drivers/connector/cn_proc.c +@@ -32,6 +32,7 @@ + #include <linux/pid_namespace.h> + + #include <linux/cn_proc.h> ++#include <linux/locallock.h> + + /* + * Size of a cn_msg followed by a proc_event structure. Since the +@@ -54,10 +55,11 @@ static struct cb_id cn_proc_event_id = { CN_IDX_PROC, CN_VAL_PROC }; + + /* proc_event_counts is used as the sequence number of the netlink message */ + static DEFINE_PER_CPU(__u32, proc_event_counts) = { 0 }; ++static DEFINE_LOCAL_IRQ_LOCK(send_msg_lock); + + static inline void send_msg(struct cn_msg *msg) + { +- preempt_disable(); ++ local_lock(send_msg_lock); + + msg->seq = __this_cpu_inc_return(proc_event_counts) - 1; + ((struct proc_event *)msg->data)->cpu = smp_processor_id(); +@@ -70,7 +72,7 @@ static inline void send_msg(struct cn_msg *msg) + */ + cn_netlink_send(msg, 0, CN_IDX_PROC, GFP_NOWAIT); + +- preempt_enable(); ++ local_unlock(send_msg_lock); + } + + void proc_fork_connector(struct task_struct *task) +diff --git a/drivers/cpufreq/Kconfig.x86 b/drivers/cpufreq/Kconfig.x86 +index adbd1de1cea5..1fac5074f2cf 100644 +--- a/drivers/cpufreq/Kconfig.x86 ++++ b/drivers/cpufreq/Kconfig.x86 +@@ -124,7 +124,7 @@ config X86_POWERNOW_K7_ACPI + + config X86_POWERNOW_K8 + tristate "AMD Opteron/Athlon64 PowerNow!" +- depends on ACPI && ACPI_PROCESSOR && X86_ACPI_CPUFREQ ++ depends on ACPI && ACPI_PROCESSOR && X86_ACPI_CPUFREQ && !PREEMPT_RT_BASE + help + This adds the CPUFreq driver for K8/early Opteron/Athlon64 processors. + Support for K10 and newer processors is now in acpi-cpufreq. +diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/i915_gem_execbuffer.c +index b35e5b6475b2..ce60807fb1d4 100644 +--- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c ++++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c +@@ -1302,7 +1302,9 @@ i915_gem_ringbuffer_submission(struct i915_execbuffer_params *params, + if (ret) + return ret; + ++#ifndef CONFIG_PREEMPT_RT_BASE + trace_i915_gem_ring_dispatch(params->request, params->dispatch_flags); ++#endif + + i915_gem_execbuffer_move_to_active(vmas, params->request); + +diff --git a/drivers/gpu/drm/i915/i915_gem_shrinker.c b/drivers/gpu/drm/i915/i915_gem_shrinker.c +index 6f10b421487b..dd3a9a6ace11 100644 +--- a/drivers/gpu/drm/i915/i915_gem_shrinker.c ++++ b/drivers/gpu/drm/i915/i915_gem_shrinker.c +@@ -40,7 +40,7 @@ static bool mutex_is_locked_by(struct mutex *mutex, struct task_struct *task) + if (!mutex_is_locked(mutex)) + return false; + +-#if defined(CONFIG_DEBUG_MUTEXES) || defined(CONFIG_MUTEX_SPIN_ON_OWNER) ++#if (defined(CONFIG_DEBUG_MUTEXES) || defined(CONFIG_MUTEX_SPIN_ON_OWNER)) && !defined(CONFIG_PREEMPT_RT_BASE) + return mutex->owner == task; + #else + /* Since UP may be pre-empted, we cannot assume that we own the lock */ +diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c +index 1c2aec392412..1d85c0c791f1 100644 +--- a/drivers/gpu/drm/i915/i915_irq.c ++++ b/drivers/gpu/drm/i915/i915_irq.c +@@ -812,6 +812,7 @@ static int i915_get_crtc_scanoutpos(struct drm_device *dev, unsigned int pipe, + spin_lock_irqsave(&dev_priv->uncore.lock, irqflags); + + /* preempt_disable_rt() should go right here in PREEMPT_RT patchset. */ ++ preempt_disable_rt(); + + /* Get optional system timestamp before query. */ + if (stime) +@@ -863,6 +864,7 @@ static int i915_get_crtc_scanoutpos(struct drm_device *dev, unsigned int pipe, + *etime = ktime_get(); + + /* preempt_enable_rt() should go right here in PREEMPT_RT patchset. */ ++ preempt_enable_rt(); + + spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags); + +diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c +index e9a64fba6333..2aac27b13d86 100644 +--- a/drivers/gpu/drm/i915/intel_display.c ++++ b/drivers/gpu/drm/i915/intel_display.c +@@ -11647,7 +11647,7 @@ void intel_check_page_flip(struct drm_i915_private *dev_priv, int pipe) + struct intel_crtc *intel_crtc = to_intel_crtc(crtc); + struct intel_flip_work *work; + +- WARN_ON(!in_interrupt()); ++ WARN_ON_NONRT(!in_interrupt()); + + if (crtc == NULL) + return; +diff --git a/drivers/gpu/drm/i915/intel_sprite.c b/drivers/gpu/drm/i915/intel_sprite.c +index 4178849631ad..0eb939c92544 100644 +--- a/drivers/gpu/drm/i915/intel_sprite.c ++++ b/drivers/gpu/drm/i915/intel_sprite.c +@@ -38,6 +38,7 @@ + #include "intel_drv.h" + #include <drm/i915_drm.h> + #include "i915_drv.h" ++#include <linux/locallock.h> + + static bool + format_is_yuv(uint32_t format) +@@ -64,6 +65,8 @@ int intel_usecs_to_scanlines(const struct drm_display_mode *adjusted_mode, + 1000 * adjusted_mode->crtc_htotal); + } + ++static DEFINE_LOCAL_IRQ_LOCK(pipe_update_lock); ++ + /** + * intel_pipe_update_start() - start update of a set of display registers + * @crtc: the crtc of which the registers are going to be updated +@@ -94,7 +97,7 @@ void intel_pipe_update_start(struct intel_crtc *crtc) + min = vblank_start - intel_usecs_to_scanlines(adjusted_mode, 100); + max = vblank_start - 1; + +- local_irq_disable(); ++ local_lock_irq(pipe_update_lock); + + if (min <= 0 || max <= 0) + return; +@@ -124,11 +127,11 @@ void intel_pipe_update_start(struct intel_crtc *crtc) + break; + } + +- local_irq_enable(); ++ local_unlock_irq(pipe_update_lock); + + timeout = schedule_timeout(timeout); + +- local_irq_disable(); ++ local_lock_irq(pipe_update_lock); + } + + finish_wait(wq, &wait); +@@ -180,7 +183,7 @@ void intel_pipe_update_end(struct intel_crtc *crtc, struct intel_flip_work *work + crtc->base.state->event = NULL; + } + +- local_irq_enable(); ++ local_unlock_irq(pipe_update_lock); + + if (crtc->debug.start_vbl_count && + crtc->debug.start_vbl_count != end_vbl_count) { +diff --git a/drivers/gpu/drm/msm/msm_gem_shrinker.c b/drivers/gpu/drm/msm/msm_gem_shrinker.c +index 283d2841ba58..d01f6ed1977e 100644 +--- a/drivers/gpu/drm/msm/msm_gem_shrinker.c ++++ b/drivers/gpu/drm/msm/msm_gem_shrinker.c +@@ -23,7 +23,7 @@ static bool mutex_is_locked_by(struct mutex *mutex, struct task_struct *task) + if (!mutex_is_locked(mutex)) + return false; + +-#if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_MUTEXES) ++#if (defined(CONFIG_SMP) || defined(CONFIG_DEBUG_MUTEXES)) && !defined(CONFIG_PREEMPT_RT_BASE) + return mutex->owner == task; + #else + /* Since UP may be pre-empted, we cannot assume that we own the lock */ +diff --git a/drivers/gpu/drm/radeon/radeon_display.c b/drivers/gpu/drm/radeon/radeon_display.c +index c3206fb8f4cf..6e2423186e2a 100644 +--- a/drivers/gpu/drm/radeon/radeon_display.c ++++ b/drivers/gpu/drm/radeon/radeon_display.c +@@ -1869,6 +1869,7 @@ int radeon_get_crtc_scanoutpos(struct drm_device *dev, unsigned int pipe, + struct radeon_device *rdev = dev->dev_private; + + /* preempt_disable_rt() should go right here in PREEMPT_RT patchset. */ ++ preempt_disable_rt(); + + /* Get optional system timestamp before query. */ + if (stime) +@@ -1961,6 +1962,7 @@ int radeon_get_crtc_scanoutpos(struct drm_device *dev, unsigned int pipe, + *etime = ktime_get(); + + /* preempt_enable_rt() should go right here in PREEMPT_RT patchset. */ ++ preempt_enable_rt(); + + /* Decode into vertical and horizontal scanout position. */ + *vpos = position & 0x1fff; +diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c +index e82f7e1c217c..b57d917b6ab7 100644 +--- a/drivers/hv/vmbus_drv.c ++++ b/drivers/hv/vmbus_drv.c +@@ -761,6 +761,8 @@ static void vmbus_isr(void) + void *page_addr; + struct hv_message *msg; + union hv_synic_event_flags *event; ++ struct pt_regs *regs = get_irq_regs(); ++ u64 ip = regs ? instruction_pointer(regs) : 0; + bool handled = false; + + page_addr = hv_context.synic_event_page[cpu]; +@@ -808,7 +810,7 @@ static void vmbus_isr(void) + tasklet_schedule(hv_context.msg_dpc[cpu]); + } + +- add_interrupt_randomness(HYPERVISOR_CALLBACK_VECTOR, 0); ++ add_interrupt_randomness(HYPERVISOR_CALLBACK_VECTOR, 0, ip); + } + + +diff --git a/drivers/ide/alim15x3.c b/drivers/ide/alim15x3.c +index 36f76e28a0bf..394f142f90c7 100644 +--- a/drivers/ide/alim15x3.c ++++ b/drivers/ide/alim15x3.c +@@ -234,7 +234,7 @@ static int init_chipset_ali15x3(struct pci_dev *dev) + + isa_dev = pci_get_device(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533, NULL); + +- local_irq_save(flags); ++ local_irq_save_nort(flags); + + if (m5229_revision < 0xC2) { + /* +@@ -325,7 +325,7 @@ static int init_chipset_ali15x3(struct pci_dev *dev) + } + pci_dev_put(north); + pci_dev_put(isa_dev); +- local_irq_restore(flags); ++ local_irq_restore_nort(flags); + return 0; + } + +diff --git a/drivers/ide/hpt366.c b/drivers/ide/hpt366.c +index 0ceae5cbd89a..c212e85d7f3e 100644 +--- a/drivers/ide/hpt366.c ++++ b/drivers/ide/hpt366.c +@@ -1236,7 +1236,7 @@ static int init_dma_hpt366(ide_hwif_t *hwif, + + dma_old = inb(base + 2); + +- local_irq_save(flags); ++ local_irq_save_nort(flags); + + dma_new = dma_old; + pci_read_config_byte(dev, hwif->channel ? 0x4b : 0x43, &masterdma); +@@ -1247,7 +1247,7 @@ static int init_dma_hpt366(ide_hwif_t *hwif, + if (dma_new != dma_old) + outb(dma_new, base + 2); + +- local_irq_restore(flags); ++ local_irq_restore_nort(flags); + + printk(KERN_INFO " %s: BM-DMA at 0x%04lx-0x%04lx\n", + hwif->name, base, base + 7); +diff --git a/drivers/ide/ide-io-std.c b/drivers/ide/ide-io-std.c +index 19763977568c..4169433faab5 100644 +--- a/drivers/ide/ide-io-std.c ++++ b/drivers/ide/ide-io-std.c +@@ -175,7 +175,7 @@ void ide_input_data(ide_drive_t *drive, struct ide_cmd *cmd, void *buf, + unsigned long uninitialized_var(flags); + + if ((io_32bit & 2) && !mmio) { +- local_irq_save(flags); ++ local_irq_save_nort(flags); + ata_vlb_sync(io_ports->nsect_addr); + } + +@@ -186,7 +186,7 @@ void ide_input_data(ide_drive_t *drive, struct ide_cmd *cmd, void *buf, + insl(data_addr, buf, words); + + if ((io_32bit & 2) && !mmio) +- local_irq_restore(flags); ++ local_irq_restore_nort(flags); + + if (((len + 1) & 3) < 2) + return; +@@ -219,7 +219,7 @@ void ide_output_data(ide_drive_t *drive, struct ide_cmd *cmd, void *buf, + unsigned long uninitialized_var(flags); + + if ((io_32bit & 2) && !mmio) { +- local_irq_save(flags); ++ local_irq_save_nort(flags); + ata_vlb_sync(io_ports->nsect_addr); + } + +@@ -230,7 +230,7 @@ void ide_output_data(ide_drive_t *drive, struct ide_cmd *cmd, void *buf, + outsl(data_addr, buf, words); + + if ((io_32bit & 2) && !mmio) +- local_irq_restore(flags); ++ local_irq_restore_nort(flags); + + if (((len + 1) & 3) < 2) + return; +diff --git a/drivers/ide/ide-io.c b/drivers/ide/ide-io.c +index 669ea1e45795..e12e43e62245 100644 +--- a/drivers/ide/ide-io.c ++++ b/drivers/ide/ide-io.c +@@ -659,7 +659,7 @@ void ide_timer_expiry (unsigned long data) + /* disable_irq_nosync ?? */ + disable_irq(hwif->irq); + /* local CPU only, as if we were handling an interrupt */ +- local_irq_disable(); ++ local_irq_disable_nort(); + if (hwif->polling) { + startstop = handler(drive); + } else if (drive_is_ready(drive)) { +diff --git a/drivers/ide/ide-iops.c b/drivers/ide/ide-iops.c +index 376f2dc410c5..f014dd1b73dc 100644 +--- a/drivers/ide/ide-iops.c ++++ b/drivers/ide/ide-iops.c +@@ -129,12 +129,12 @@ int __ide_wait_stat(ide_drive_t *drive, u8 good, u8 bad, + if ((stat & ATA_BUSY) == 0) + break; + +- local_irq_restore(flags); ++ local_irq_restore_nort(flags); + *rstat = stat; + return -EBUSY; + } + } +- local_irq_restore(flags); ++ local_irq_restore_nort(flags); + } + /* + * Allow status to settle, then read it again. +diff --git a/drivers/ide/ide-probe.c b/drivers/ide/ide-probe.c +index 0b63facd1d87..4ceba37afc0c 100644 +--- a/drivers/ide/ide-probe.c ++++ b/drivers/ide/ide-probe.c +@@ -196,10 +196,10 @@ static void do_identify(ide_drive_t *drive, u8 cmd, u16 *id) + int bswap = 1; + + /* local CPU only; some systems need this */ +- local_irq_save(flags); ++ local_irq_save_nort(flags); + /* read 512 bytes of id info */ + hwif->tp_ops->input_data(drive, NULL, id, SECTOR_SIZE); +- local_irq_restore(flags); ++ local_irq_restore_nort(flags); + + drive->dev_flags |= IDE_DFLAG_ID_READ; + #ifdef DEBUG +diff --git a/drivers/ide/ide-taskfile.c b/drivers/ide/ide-taskfile.c +index a716693417a3..be0568c722d6 100644 +--- a/drivers/ide/ide-taskfile.c ++++ b/drivers/ide/ide-taskfile.c +@@ -250,7 +250,7 @@ void ide_pio_bytes(ide_drive_t *drive, struct ide_cmd *cmd, + + page_is_high = PageHighMem(page); + if (page_is_high) +- local_irq_save(flags); ++ local_irq_save_nort(flags); + + buf = kmap_atomic(page) + offset; + +@@ -271,7 +271,7 @@ void ide_pio_bytes(ide_drive_t *drive, struct ide_cmd *cmd, + kunmap_atomic(buf); + + if (page_is_high) +- local_irq_restore(flags); ++ local_irq_restore_nort(flags); + + len -= nr_bytes; + } +@@ -414,7 +414,7 @@ static ide_startstop_t pre_task_out_intr(ide_drive_t *drive, + } + + if ((drive->dev_flags & IDE_DFLAG_UNMASK) == 0) +- local_irq_disable(); ++ local_irq_disable_nort(); + + ide_set_handler(drive, &task_pio_intr, WAIT_WORSTCASE); + +diff --git a/drivers/infiniband/ulp/ipoib/ipoib_multicast.c b/drivers/infiniband/ulp/ipoib/ipoib_multicast.c +index d3394b6add24..506bfba6ec9f 100644 +--- a/drivers/infiniband/ulp/ipoib/ipoib_multicast.c ++++ b/drivers/infiniband/ulp/ipoib/ipoib_multicast.c +@@ -897,7 +897,7 @@ void ipoib_mcast_restart_task(struct work_struct *work) + + ipoib_dbg_mcast(priv, "restarting multicast task\n"); + +- local_irq_save(flags); ++ local_irq_save_nort(flags); + netif_addr_lock(dev); + spin_lock(&priv->lock); + +@@ -979,7 +979,7 @@ void ipoib_mcast_restart_task(struct work_struct *work) + + spin_unlock(&priv->lock); + netif_addr_unlock(dev); +- local_irq_restore(flags); ++ local_irq_restore_nort(flags); + + /* + * make sure the in-flight joins have finished before we attempt +diff --git a/drivers/input/gameport/gameport.c b/drivers/input/gameport/gameport.c +index 4a2a9e370be7..e970d9afd179 100644 +--- a/drivers/input/gameport/gameport.c ++++ b/drivers/input/gameport/gameport.c +@@ -91,13 +91,13 @@ static int gameport_measure_speed(struct gameport *gameport) + tx = ~0; + + for (i = 0; i < 50; i++) { +- local_irq_save(flags); ++ local_irq_save_nort(flags); + t1 = ktime_get_ns(); + for (t = 0; t < 50; t++) + gameport_read(gameport); + t2 = ktime_get_ns(); + t3 = ktime_get_ns(); +- local_irq_restore(flags); ++ local_irq_restore_nort(flags); + udelay(i * 10); + t = (t2 - t1) - (t3 - t2); + if (t < tx) +@@ -124,12 +124,12 @@ static int old_gameport_measure_speed(struct gameport *gameport) + tx = 1 << 30; + + for(i = 0; i < 50; i++) { +- local_irq_save(flags); ++ local_irq_save_nort(flags); + GET_TIME(t1); + for (t = 0; t < 50; t++) gameport_read(gameport); + GET_TIME(t2); + GET_TIME(t3); +- local_irq_restore(flags); ++ local_irq_restore_nort(flags); + udelay(i * 10); + if ((t = DELTA(t2,t1) - DELTA(t3,t2)) < tx) tx = t; + } +@@ -148,11 +148,11 @@ static int old_gameport_measure_speed(struct gameport *gameport) + tx = 1 << 30; + + for(i = 0; i < 50; i++) { +- local_irq_save(flags); ++ local_irq_save_nort(flags); + t1 = rdtsc(); + for (t = 0; t < 50; t++) gameport_read(gameport); + t2 = rdtsc(); +- local_irq_restore(flags); ++ local_irq_restore_nort(flags); + udelay(i * 10); + if (t2 - t1 < tx) tx = t2 - t1; + } +diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c +index 96de97a46079..a6ec875d941b 100644 +--- a/drivers/iommu/amd_iommu.c ++++ b/drivers/iommu/amd_iommu.c +@@ -1832,10 +1832,10 @@ static int __attach_device(struct iommu_dev_data *dev_data, + int ret; + + /* +- * Must be called with IRQs disabled. Warn here to detect early +- * when its not. ++ * Must be called with IRQs disabled on a non RT kernel. Warn here to ++ * detect early when its not. + */ +- WARN_ON(!irqs_disabled()); ++ WARN_ON_NONRT(!irqs_disabled()); + + /* lock domain */ + spin_lock(&domain->lock); +@@ -2003,10 +2003,10 @@ static void __detach_device(struct iommu_dev_data *dev_data) + struct protection_domain *domain; + + /* +- * Must be called with IRQs disabled. Warn here to detect early +- * when its not. ++ * Must be called with IRQs disabled on a non RT kernel. Warn here to ++ * detect early when its not. + */ +- WARN_ON(!irqs_disabled()); ++ WARN_ON_NONRT(!irqs_disabled()); + + if (WARN_ON(!dev_data->domain)) + return; +diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c +index ebb5bf3ddbd9..598f5df45f6b 100644 +--- a/drivers/iommu/intel-iommu.c ++++ b/drivers/iommu/intel-iommu.c +@@ -479,7 +479,7 @@ struct deferred_flush_data { + struct deferred_flush_table *tables; + }; + +-DEFINE_PER_CPU(struct deferred_flush_data, deferred_flush); ++static DEFINE_PER_CPU(struct deferred_flush_data, deferred_flush); + + /* bitmap for indexing intel_iommus */ + static int g_num_of_iommus; +@@ -3626,10 +3626,8 @@ static void add_unmap(struct dmar_domain *dom, unsigned long iova_pfn, + struct intel_iommu *iommu; + struct deferred_flush_entry *entry; + struct deferred_flush_data *flush_data; +- unsigned int cpuid; + +- cpuid = get_cpu(); +- flush_data = per_cpu_ptr(&deferred_flush, cpuid); ++ flush_data = raw_cpu_ptr(&deferred_flush); + + /* Flush all CPUs' entries to avoid deferring too much. If + * this becomes a bottleneck, can just flush us, and rely on +@@ -3662,8 +3660,6 @@ static void add_unmap(struct dmar_domain *dom, unsigned long iova_pfn, + } + flush_data->size++; + spin_unlock_irqrestore(&flush_data->lock, flags); +- +- put_cpu(); + } + + static void intel_unmap(struct device *dev, dma_addr_t dev_addr, size_t size) +diff --git a/drivers/iommu/iova.c b/drivers/iommu/iova.c +index e23001bfcfee..359d5d169ec0 100644 +--- a/drivers/iommu/iova.c ++++ b/drivers/iommu/iova.c +@@ -22,6 +22,7 @@ + #include <linux/slab.h> + #include <linux/smp.h> + #include <linux/bitops.h> ++#include <linux/cpu.h> + + static bool iova_rcache_insert(struct iova_domain *iovad, + unsigned long pfn, +@@ -420,10 +421,8 @@ alloc_iova_fast(struct iova_domain *iovad, unsigned long size, + + /* Try replenishing IOVAs by flushing rcache. */ + flushed_rcache = true; +- preempt_disable(); + for_each_online_cpu(cpu) + free_cpu_cached_iovas(cpu, iovad); +- preempt_enable(); + goto retry; + } + +@@ -751,7 +750,7 @@ static bool __iova_rcache_insert(struct iova_domain *iovad, + bool can_insert = false; + unsigned long flags; + +- cpu_rcache = get_cpu_ptr(rcache->cpu_rcaches); ++ cpu_rcache = raw_cpu_ptr(rcache->cpu_rcaches); + spin_lock_irqsave(&cpu_rcache->lock, flags); + + if (!iova_magazine_full(cpu_rcache->loaded)) { +@@ -781,7 +780,6 @@ static bool __iova_rcache_insert(struct iova_domain *iovad, + iova_magazine_push(cpu_rcache->loaded, iova_pfn); + + spin_unlock_irqrestore(&cpu_rcache->lock, flags); +- put_cpu_ptr(rcache->cpu_rcaches); + + if (mag_to_free) { + iova_magazine_free_pfns(mag_to_free, iovad); +@@ -815,7 +813,7 @@ static unsigned long __iova_rcache_get(struct iova_rcache *rcache, + bool has_pfn = false; + unsigned long flags; + +- cpu_rcache = get_cpu_ptr(rcache->cpu_rcaches); ++ cpu_rcache = raw_cpu_ptr(rcache->cpu_rcaches); + spin_lock_irqsave(&cpu_rcache->lock, flags); + + if (!iova_magazine_empty(cpu_rcache->loaded)) { +@@ -837,7 +835,6 @@ static unsigned long __iova_rcache_get(struct iova_rcache *rcache, + iova_pfn = iova_magazine_pop(cpu_rcache->loaded, limit_pfn); + + spin_unlock_irqrestore(&cpu_rcache->lock, flags); +- put_cpu_ptr(rcache->cpu_rcaches); + + return iova_pfn; + } +diff --git a/drivers/leds/trigger/Kconfig b/drivers/leds/trigger/Kconfig +index 3f9ddb9fafa7..09da5b6b44a1 100644 +--- a/drivers/leds/trigger/Kconfig ++++ b/drivers/leds/trigger/Kconfig +@@ -69,7 +69,7 @@ config LEDS_TRIGGER_BACKLIGHT + + config LEDS_TRIGGER_CPU + bool "LED CPU Trigger" +- depends on LEDS_TRIGGERS ++ depends on LEDS_TRIGGERS && !PREEMPT_RT_BASE + help + This allows LEDs to be controlled by active CPUs. This shows + the active CPUs across an array of LEDs so you can see which +diff --git a/drivers/md/bcache/Kconfig b/drivers/md/bcache/Kconfig +index 4d200883c505..98b64ed5cb81 100644 +--- a/drivers/md/bcache/Kconfig ++++ b/drivers/md/bcache/Kconfig +@@ -1,6 +1,7 @@ + + config BCACHE + tristate "Block device as cache" ++ depends on !PREEMPT_RT_FULL + ---help--- + Allows a block device to be used as cache for other devices; uses + a btree for indexing and the layout is optimized for SSDs. +diff --git a/drivers/md/dm-rq.c b/drivers/md/dm-rq.c +index 5da86c8b6545..2aa092f2977e 100644 +--- a/drivers/md/dm-rq.c ++++ b/drivers/md/dm-rq.c +@@ -811,7 +811,7 @@ static void dm_old_request_fn(struct request_queue *q) + /* Establish tio->ti before queuing work (map_tio_request) */ + tio->ti = ti; + queue_kthread_work(&md->kworker, &tio->work); +- BUG_ON(!irqs_disabled()); ++ BUG_ON_NONRT(!irqs_disabled()); + } + } + +diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c +index ee7fc3701700..ae59c9e13911 100644 +--- a/drivers/md/raid5.c ++++ b/drivers/md/raid5.c +@@ -1928,8 +1928,9 @@ static void raid_run_ops(struct stripe_head *sh, unsigned long ops_request) + struct raid5_percpu *percpu; + unsigned long cpu; + +- cpu = get_cpu(); ++ cpu = get_cpu_light(); + percpu = per_cpu_ptr(conf->percpu, cpu); ++ spin_lock(&percpu->lock); + if (test_bit(STRIPE_OP_BIOFILL, &ops_request)) { + ops_run_biofill(sh); + overlap_clear++; +@@ -1985,7 +1986,8 @@ static void raid_run_ops(struct stripe_head *sh, unsigned long ops_request) + if (test_and_clear_bit(R5_Overlap, &dev->flags)) + wake_up(&sh->raid_conf->wait_for_overlap); + } +- put_cpu(); ++ spin_unlock(&percpu->lock); ++ put_cpu_light(); + } + + static struct stripe_head *alloc_stripe(struct kmem_cache *sc, gfp_t gfp, +@@ -6438,6 +6440,7 @@ static int raid5_alloc_percpu(struct r5conf *conf) + __func__, cpu); + break; + } ++ spin_lock_init(&per_cpu_ptr(conf->percpu, cpu)->lock); + } + put_online_cpus(); + +diff --git a/drivers/md/raid5.h b/drivers/md/raid5.h +index 517d4b68a1be..efe91887ecd7 100644 +--- a/drivers/md/raid5.h ++++ b/drivers/md/raid5.h +@@ -504,6 +504,7 @@ struct r5conf { + int recovery_disabled; + /* per cpu variables */ + struct raid5_percpu { ++ spinlock_t lock; /* Protection for -RT */ + struct page *spare_page; /* Used when checking P/Q in raid6 */ + struct flex_array *scribble; /* space for constructing buffer + * lists and performing address +diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig +index d00252828966..9faab404faac 100644 +--- a/drivers/misc/Kconfig ++++ b/drivers/misc/Kconfig +@@ -54,6 +54,7 @@ config AD525X_DPOT_SPI + config ATMEL_TCLIB + bool "Atmel AT32/AT91 Timer/Counter Library" + depends on (AVR32 || ARCH_AT91) ++ default y if PREEMPT_RT_FULL + help + Select this if you want a library to allocate the Timer/Counter + blocks found on many Atmel processors. This facilitates using +@@ -69,8 +70,7 @@ config ATMEL_TCB_CLKSRC + are combined to make a single 32-bit timer. + + When GENERIC_CLOCKEVENTS is defined, the third timer channel +- may be used as a clock event device supporting oneshot mode +- (delays of up to two seconds) based on the 32 KiHz clock. ++ may be used as a clock event device supporting oneshot mode. + + config ATMEL_TCB_CLKSRC_BLOCK + int +@@ -84,6 +84,15 @@ config ATMEL_TCB_CLKSRC_BLOCK + TC can be used for other purposes, such as PWM generation and + interval timing. + ++config ATMEL_TCB_CLKSRC_USE_SLOW_CLOCK ++ bool "TC Block use 32 KiHz clock" ++ depends on ATMEL_TCB_CLKSRC ++ default y if !PREEMPT_RT_FULL ++ help ++ Select this to use 32 KiHz base clock rate as TC block clock ++ source for clock events. ++ ++ + config DUMMY_IRQ + tristate "Dummy IRQ handler" + default n +@@ -114,6 +123,35 @@ config IBM_ASM + for information on the specific driver level and support statement + for your IBM server. + ++config HWLAT_DETECTOR ++ tristate "Testing module to detect hardware-induced latencies" ++ depends on DEBUG_FS ++ depends on RING_BUFFER ++ default m ++ ---help--- ++ A simple hardware latency detector. Use this module to detect ++ large latencies introduced by the behavior of the underlying ++ system firmware external to Linux. We do this using periodic ++ use of stop_machine to grab all available CPUs and measure ++ for unexplainable gaps in the CPU timestamp counter(s). By ++ default, the module is not enabled until the "enable" file ++ within the "hwlat_detector" debugfs directory is toggled. ++ ++ This module is often used to detect SMI (System Management ++ Interrupts) on x86 systems, though is not x86 specific. To ++ this end, we default to using a sample window of 1 second, ++ during which we will sample for 0.5 seconds. If an SMI or ++ similar event occurs during that time, it is recorded ++ into an 8K samples global ring buffer until retreived. ++ ++ WARNING: This software should never be enabled (it can be built ++ but should not be turned on after it is loaded) in a production ++ environment where high latencies are a concern since the ++ sampling mechanism actually introduces latencies for ++ regular tasks while the CPU(s) are being held. ++ ++ If unsure, say N ++ + config PHANTOM + tristate "Sensable PHANToM (PCI)" + depends on PCI +diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile +index fb32516ddfe2..8643df9af3c4 100644 +--- a/drivers/misc/Makefile ++++ b/drivers/misc/Makefile +@@ -38,6 +38,7 @@ obj-$(CONFIG_C2PORT) += c2port/ + obj-$(CONFIG_HMC6352) += hmc6352.o + obj-y += eeprom/ + obj-y += cb710/ ++obj-$(CONFIG_HWLAT_DETECTOR) += hwlat_detector.o + obj-$(CONFIG_SPEAR13XX_PCIE_GADGET) += spear13xx_pcie_gadget.o + obj-$(CONFIG_VMWARE_BALLOON) += vmw_balloon.o + obj-$(CONFIG_ARM_CHARLCD) += arm-charlcd.o +diff --git a/drivers/misc/hwlat_detector.c b/drivers/misc/hwlat_detector.c +new file mode 100644 +index 000000000000..52f5ad5fd9c0 +--- /dev/null ++++ b/drivers/misc/hwlat_detector.c +@@ -0,0 +1,1240 @@ ++/* ++ * hwlat_detector.c - A simple Hardware Latency detector. ++ * ++ * Use this module to detect large system latencies induced by the behavior of ++ * certain underlying system hardware or firmware, independent of Linux itself. ++ * The code was developed originally to detect the presence of SMIs on Intel ++ * and AMD systems, although there is no dependency upon x86 herein. ++ * ++ * The classical example usage of this module is in detecting the presence of ++ * SMIs or System Management Interrupts on Intel and AMD systems. An SMI is a ++ * somewhat special form of hardware interrupt spawned from earlier CPU debug ++ * modes in which the (BIOS/EFI/etc.) firmware arranges for the South Bridge ++ * LPC (or other device) to generate a special interrupt under certain ++ * circumstances, for example, upon expiration of a special SMI timer device, ++ * due to certain external thermal readings, on certain I/O address accesses, ++ * and other situations. An SMI hits a special CPU pin, triggers a special ++ * SMI mode (complete with special memory map), and the OS is unaware. ++ * ++ * Although certain hardware-inducing latencies are necessary (for example, ++ * a modern system often requires an SMI handler for correct thermal control ++ * and remote management) they can wreak havoc upon any OS-level performance ++ * guarantees toward low-latency, especially when the OS is not even made ++ * aware of the presence of these interrupts. For this reason, we need a ++ * somewhat brute force mechanism to detect these interrupts. In this case, ++ * we do it by hogging all of the CPU(s) for configurable timer intervals, ++ * sampling the built-in CPU timer, looking for discontiguous readings. ++ * ++ * WARNING: This implementation necessarily introduces latencies. Therefore, ++ * you should NEVER use this module in a production environment ++ * requiring any kind of low-latency performance guarantee(s). ++ * ++ * Copyright (C) 2008-2009 Jon Masters, Red Hat, Inc. <jcm@redhat.com> ++ * ++ * Includes useful feedback from Clark Williams <clark@redhat.com> ++ * ++ * This file is licensed under the terms of the GNU General Public ++ * License version 2. This program is licensed "as is" without any ++ * warranty of any kind, whether express or implied. ++ */ ++ ++#include <linux/module.h> ++#include <linux/init.h> ++#include <linux/ring_buffer.h> ++#include <linux/time.h> ++#include <linux/hrtimer.h> ++#include <linux/kthread.h> ++#include <linux/debugfs.h> ++#include <linux/seq_file.h> ++#include <linux/uaccess.h> ++#include <linux/version.h> ++#include <linux/delay.h> ++#include <linux/slab.h> ++#include <linux/trace_clock.h> ++ ++#define BUF_SIZE_DEFAULT 262144UL /* 8K*(sizeof(entry)) */ ++#define BUF_FLAGS (RB_FL_OVERWRITE) /* no block on full */ ++#define U64STR_SIZE 22 /* 20 digits max */ ++ ++#define VERSION "1.0.0" ++#define BANNER "hwlat_detector: " ++#define DRVNAME "hwlat_detector" ++#define DEFAULT_SAMPLE_WINDOW 1000000 /* 1s */ ++#define DEFAULT_SAMPLE_WIDTH 500000 /* 0.5s */ ++#define DEFAULT_LAT_THRESHOLD 10 /* 10us */ ++ ++/* Module metadata */ ++ ++MODULE_LICENSE("GPL"); ++MODULE_AUTHOR("Jon Masters <jcm@redhat.com>"); ++MODULE_DESCRIPTION("A simple hardware latency detector"); ++MODULE_VERSION(VERSION); ++ ++/* Module parameters */ ++ ++static int debug; ++static int enabled; ++static int threshold; ++ ++module_param(debug, int, 0); /* enable debug */ ++module_param(enabled, int, 0); /* enable detector */ ++module_param(threshold, int, 0); /* latency threshold */ ++ ++/* Buffering and sampling */ ++ ++static struct ring_buffer *ring_buffer; /* sample buffer */ ++static DEFINE_MUTEX(ring_buffer_mutex); /* lock changes */ ++static unsigned long buf_size = BUF_SIZE_DEFAULT; ++static struct task_struct *kthread; /* sampling thread */ ++ ++/* DebugFS filesystem entries */ ++ ++static struct dentry *debug_dir; /* debugfs directory */ ++static struct dentry *debug_max; /* maximum TSC delta */ ++static struct dentry *debug_count; /* total detect count */ ++static struct dentry *debug_sample_width; /* sample width us */ ++static struct dentry *debug_sample_window; /* sample window us */ ++static struct dentry *debug_sample; /* raw samples us */ ++static struct dentry *debug_threshold; /* threshold us */ ++static struct dentry *debug_enable; /* enable/disable */ ++ ++/* Individual samples and global state */ ++ ++struct sample; /* latency sample */ ++struct data; /* Global state */ ++ ++/* Sampling functions */ ++static int __buffer_add_sample(struct sample *sample); ++static struct sample *buffer_get_sample(struct sample *sample); ++ ++/* Threading and state */ ++static int kthread_fn(void *unused); ++static int start_kthread(void); ++static int stop_kthread(void); ++static void __reset_stats(void); ++static int init_stats(void); ++ ++/* Debugfs interface */ ++static ssize_t simple_data_read(struct file *filp, char __user *ubuf, ++ size_t cnt, loff_t *ppos, const u64 *entry); ++static ssize_t simple_data_write(struct file *filp, const char __user *ubuf, ++ size_t cnt, loff_t *ppos, u64 *entry); ++static int debug_sample_fopen(struct inode *inode, struct file *filp); ++static ssize_t debug_sample_fread(struct file *filp, char __user *ubuf, ++ size_t cnt, loff_t *ppos); ++static int debug_sample_release(struct inode *inode, struct file *filp); ++static int debug_enable_fopen(struct inode *inode, struct file *filp); ++static ssize_t debug_enable_fread(struct file *filp, char __user *ubuf, ++ size_t cnt, loff_t *ppos); ++static ssize_t debug_enable_fwrite(struct file *file, ++ const char __user *user_buffer, ++ size_t user_size, loff_t *offset); ++ ++/* Initialization functions */ ++static int init_debugfs(void); ++static void free_debugfs(void); ++static int detector_init(void); ++static void detector_exit(void); ++ ++/* Individual latency samples are stored here when detected and packed into ++ * the ring_buffer circular buffer, where they are overwritten when ++ * more than buf_size/sizeof(sample) samples are received. */ ++struct sample { ++ u64 seqnum; /* unique sequence */ ++ u64 duration; /* ktime delta */ ++ u64 outer_duration; /* ktime delta (outer loop) */ ++ struct timespec timestamp; /* wall time */ ++ unsigned long lost; ++}; ++ ++/* keep the global state somewhere. */ ++static struct data { ++ ++ struct mutex lock; /* protect changes */ ++ ++ u64 count; /* total since reset */ ++ u64 max_sample; /* max hardware latency */ ++ u64 threshold; /* sample threshold level */ ++ ++ u64 sample_window; /* total sampling window (on+off) */ ++ u64 sample_width; /* active sampling portion of window */ ++ ++ atomic_t sample_open; /* whether the sample file is open */ ++ ++ wait_queue_head_t wq; /* waitqeue for new sample values */ ++ ++} data; ++ ++/** ++ * __buffer_add_sample - add a new latency sample recording to the ring buffer ++ * @sample: The new latency sample value ++ * ++ * This receives a new latency sample and records it in a global ring buffer. ++ * No additional locking is used in this case. ++ */ ++static int __buffer_add_sample(struct sample *sample) ++{ ++ return ring_buffer_write(ring_buffer, ++ sizeof(struct sample), sample); ++} ++ ++/** ++ * buffer_get_sample - remove a hardware latency sample from the ring buffer ++ * @sample: Pre-allocated storage for the sample ++ * ++ * This retrieves a hardware latency sample from the global circular buffer ++ */ ++static struct sample *buffer_get_sample(struct sample *sample) ++{ ++ struct ring_buffer_event *e = NULL; ++ struct sample *s = NULL; ++ unsigned int cpu = 0; ++ ++ if (!sample) ++ return NULL; ++ ++ mutex_lock(&ring_buffer_mutex); ++ for_each_online_cpu(cpu) { ++ e = ring_buffer_consume(ring_buffer, cpu, NULL, &sample->lost); ++ if (e) ++ break; ++ } ++ ++ if (e) { ++ s = ring_buffer_event_data(e); ++ memcpy(sample, s, sizeof(struct sample)); ++ } else ++ sample = NULL; ++ mutex_unlock(&ring_buffer_mutex); ++ ++ return sample; ++} ++ ++#ifndef CONFIG_TRACING ++#define time_type ktime_t ++#define time_get() ktime_get() ++#define time_to_us(x) ktime_to_us(x) ++#define time_sub(a, b) ktime_sub(a, b) ++#define init_time(a, b) (a).tv64 = b ++#define time_u64(a) ((a).tv64) ++#else ++#define time_type u64 ++#define time_get() trace_clock_local() ++#define time_to_us(x) div_u64(x, 1000) ++#define time_sub(a, b) ((a) - (b)) ++#define init_time(a, b) (a = b) ++#define time_u64(a) a ++#endif ++/** ++ * get_sample - sample the CPU TSC and look for likely hardware latencies ++ * ++ * Used to repeatedly capture the CPU TSC (or similar), looking for potential ++ * hardware-induced latency. Called with interrupts disabled and with ++ * data.lock held. ++ */ ++static int get_sample(void) ++{ ++ time_type start, t1, t2, last_t2; ++ s64 diff, total = 0; ++ u64 sample = 0; ++ u64 outer_sample = 0; ++ int ret = -1; ++ ++ init_time(last_t2, 0); ++ start = time_get(); /* start timestamp */ ++ ++ do { ++ ++ t1 = time_get(); /* we'll look for a discontinuity */ ++ t2 = time_get(); ++ ++ if (time_u64(last_t2)) { ++ /* Check the delta from outer loop (t2 to next t1) */ ++ diff = time_to_us(time_sub(t1, last_t2)); ++ /* This shouldn't happen */ ++ if (diff < 0) { ++ pr_err(BANNER "time running backwards\n"); ++ goto out; ++ } ++ if (diff > outer_sample) ++ outer_sample = diff; ++ } ++ last_t2 = t2; ++ ++ total = time_to_us(time_sub(t2, start)); /* sample width */ ++ ++ /* This checks the inner loop (t1 to t2) */ ++ diff = time_to_us(time_sub(t2, t1)); /* current diff */ ++ ++ /* This shouldn't happen */ ++ if (diff < 0) { ++ pr_err(BANNER "time running backwards\n"); ++ goto out; ++ } ++ ++ if (diff > sample) ++ sample = diff; /* only want highest value */ ++ ++ } while (total <= data.sample_width); ++ ++ ret = 0; ++ ++ /* If we exceed the threshold value, we have found a hardware latency */ ++ if (sample > data.threshold || outer_sample > data.threshold) { ++ struct sample s; ++ ++ ret = 1; ++ ++ data.count++; ++ s.seqnum = data.count; ++ s.duration = sample; ++ s.outer_duration = outer_sample; ++ s.timestamp = CURRENT_TIME; ++ __buffer_add_sample(&s); ++ ++ /* Keep a running maximum ever recorded hardware latency */ ++ if (sample > data.max_sample) ++ data.max_sample = sample; ++ } ++ ++out: ++ return ret; ++} ++ ++/* ++ * kthread_fn - The CPU time sampling/hardware latency detection kernel thread ++ * @unused: A required part of the kthread API. ++ * ++ * Used to periodically sample the CPU TSC via a call to get_sample. We ++ * disable interrupts, which does (intentionally) introduce latency since we ++ * need to ensure nothing else might be running (and thus pre-empting). ++ * Obviously this should never be used in production environments. ++ * ++ * Currently this runs on which ever CPU it was scheduled on, but most ++ * real-worald hardware latency situations occur across several CPUs, ++ * but we might later generalize this if we find there are any actualy ++ * systems with alternate SMI delivery or other hardware latencies. ++ */ ++static int kthread_fn(void *unused) ++{ ++ int ret; ++ u64 interval; ++ ++ while (!kthread_should_stop()) { ++ ++ mutex_lock(&data.lock); ++ ++ local_irq_disable(); ++ ret = get_sample(); ++ local_irq_enable(); ++ ++ if (ret > 0) ++ wake_up(&data.wq); /* wake up reader(s) */ ++ ++ interval = data.sample_window - data.sample_width; ++ do_div(interval, USEC_PER_MSEC); /* modifies interval value */ ++ ++ mutex_unlock(&data.lock); ++ ++ if (msleep_interruptible(interval)) ++ break; ++ } ++ ++ return 0; ++} ++ ++/** ++ * start_kthread - Kick off the hardware latency sampling/detector kthread ++ * ++ * This starts a kernel thread that will sit and sample the CPU timestamp ++ * counter (TSC or similar) and look for potential hardware latencies. ++ */ ++static int start_kthread(void) ++{ ++ kthread = kthread_run(kthread_fn, NULL, ++ DRVNAME); ++ if (IS_ERR(kthread)) { ++ pr_err(BANNER "could not start sampling thread\n"); ++ enabled = 0; ++ return -ENOMEM; ++ } ++ ++ return 0; ++} ++ ++/** ++ * stop_kthread - Inform the hardware latency samping/detector kthread to stop ++ * ++ * This kicks the running hardware latency sampling/detector kernel thread and ++ * tells it to stop sampling now. Use this on unload and at system shutdown. ++ */ ++static int stop_kthread(void) ++{ ++ int ret; ++ ++ ret = kthread_stop(kthread); ++ ++ return ret; ++} ++ ++/** ++ * __reset_stats - Reset statistics for the hardware latency detector ++ * ++ * We use data to store various statistics and global state. We call this ++ * function in order to reset those when "enable" is toggled on or off, and ++ * also at initialization. Should be called with data.lock held. ++ */ ++static void __reset_stats(void) ++{ ++ data.count = 0; ++ data.max_sample = 0; ++ ring_buffer_reset(ring_buffer); /* flush out old sample entries */ ++} ++ ++/** ++ * init_stats - Setup global state statistics for the hardware latency detector ++ * ++ * We use data to store various statistics and global state. We also use ++ * a global ring buffer (ring_buffer) to keep raw samples of detected hardware ++ * induced system latencies. This function initializes these structures and ++ * allocates the global ring buffer also. ++ */ ++static int init_stats(void) ++{ ++ int ret = -ENOMEM; ++ ++ mutex_init(&data.lock); ++ init_waitqueue_head(&data.wq); ++ atomic_set(&data.sample_open, 0); ++ ++ ring_buffer = ring_buffer_alloc(buf_size, BUF_FLAGS); ++ ++ if (WARN(!ring_buffer, KERN_ERR BANNER ++ "failed to allocate ring buffer!\n")) ++ goto out; ++ ++ __reset_stats(); ++ data.threshold = threshold ?: DEFAULT_LAT_THRESHOLD; /* threshold us */ ++ data.sample_window = DEFAULT_SAMPLE_WINDOW; /* window us */ ++ data.sample_width = DEFAULT_SAMPLE_WIDTH; /* width us */ ++ ++ ret = 0; ++ ++out: ++ return ret; ++ ++} ++ ++/* ++ * simple_data_read - Wrapper read function for global state debugfs entries ++ * @filp: The active open file structure for the debugfs "file" ++ * @ubuf: The userspace provided buffer to read value into ++ * @cnt: The maximum number of bytes to read ++ * @ppos: The current "file" position ++ * @entry: The entry to read from ++ * ++ * This function provides a generic read implementation for the global state ++ * "data" structure debugfs filesystem entries. It would be nice to use ++ * simple_attr_read directly, but we need to make sure that the data.lock ++ * is held during the actual read. ++ */ ++static ssize_t simple_data_read(struct file *filp, char __user *ubuf, ++ size_t cnt, loff_t *ppos, const u64 *entry) ++{ ++ char buf[U64STR_SIZE]; ++ u64 val = 0; ++ int len = 0; ++ ++ memset(buf, 0, sizeof(buf)); ++ ++ if (!entry) ++ return -EFAULT; ++ ++ mutex_lock(&data.lock); ++ val = *entry; ++ mutex_unlock(&data.lock); ++ ++ len = snprintf(buf, sizeof(buf), "%llu\n", (unsigned long long)val); ++ ++ return simple_read_from_buffer(ubuf, cnt, ppos, buf, len); ++ ++} ++ ++/* ++ * simple_data_write - Wrapper write function for global state debugfs entries ++ * @filp: The active open file structure for the debugfs "file" ++ * @ubuf: The userspace provided buffer to write value from ++ * @cnt: The maximum number of bytes to write ++ * @ppos: The current "file" position ++ * @entry: The entry to write to ++ * ++ * This function provides a generic write implementation for the global state ++ * "data" structure debugfs filesystem entries. It would be nice to use ++ * simple_attr_write directly, but we need to make sure that the data.lock ++ * is held during the actual write. ++ */ ++static ssize_t simple_data_write(struct file *filp, const char __user *ubuf, ++ size_t cnt, loff_t *ppos, u64 *entry) ++{ ++ char buf[U64STR_SIZE]; ++ int csize = min(cnt, sizeof(buf)); ++ u64 val = 0; ++ int err = 0; ++ ++ memset(buf, '\0', sizeof(buf)); ++ if (copy_from_user(buf, ubuf, csize)) ++ return -EFAULT; ++ ++ buf[U64STR_SIZE-1] = '\0'; /* just in case */ ++ err = kstrtoull(buf, 10, &val); ++ if (err) ++ return -EINVAL; ++ ++ mutex_lock(&data.lock); ++ *entry = val; ++ mutex_unlock(&data.lock); ++ ++ return csize; ++} ++ ++/** ++ * debug_count_fopen - Open function for "count" debugfs entry ++ * @inode: The in-kernel inode representation of the debugfs "file" ++ * @filp: The active open file structure for the debugfs "file" ++ * ++ * This function provides an open implementation for the "count" debugfs ++ * interface to the hardware latency detector. ++ */ ++static int debug_count_fopen(struct inode *inode, struct file *filp) ++{ ++ return 0; ++} ++ ++/** ++ * debug_count_fread - Read function for "count" debugfs entry ++ * @filp: The active open file structure for the debugfs "file" ++ * @ubuf: The userspace provided buffer to read value into ++ * @cnt: The maximum number of bytes to read ++ * @ppos: The current "file" position ++ * ++ * This function provides a read implementation for the "count" debugfs ++ * interface to the hardware latency detector. Can be used to read the ++ * number of latency readings exceeding the configured threshold since ++ * the detector was last reset (e.g. by writing a zero into "count"). ++ */ ++static ssize_t debug_count_fread(struct file *filp, char __user *ubuf, ++ size_t cnt, loff_t *ppos) ++{ ++ return simple_data_read(filp, ubuf, cnt, ppos, &data.count); ++} ++ ++/** ++ * debug_count_fwrite - Write function for "count" debugfs entry ++ * @filp: The active open file structure for the debugfs "file" ++ * @ubuf: The user buffer that contains the value to write ++ * @cnt: The maximum number of bytes to write to "file" ++ * @ppos: The current position in the debugfs "file" ++ * ++ * This function provides a write implementation for the "count" debugfs ++ * interface to the hardware latency detector. Can be used to write a ++ * desired value, especially to zero the total count. ++ */ ++static ssize_t debug_count_fwrite(struct file *filp, ++ const char __user *ubuf, ++ size_t cnt, ++ loff_t *ppos) ++{ ++ return simple_data_write(filp, ubuf, cnt, ppos, &data.count); ++} ++ ++/** ++ * debug_enable_fopen - Dummy open function for "enable" debugfs interface ++ * @inode: The in-kernel inode representation of the debugfs "file" ++ * @filp: The active open file structure for the debugfs "file" ++ * ++ * This function provides an open implementation for the "enable" debugfs ++ * interface to the hardware latency detector. ++ */ ++static int debug_enable_fopen(struct inode *inode, struct file *filp) ++{ ++ return 0; ++} ++ ++/** ++ * debug_enable_fread - Read function for "enable" debugfs interface ++ * @filp: The active open file structure for the debugfs "file" ++ * @ubuf: The userspace provided buffer to read value into ++ * @cnt: The maximum number of bytes to read ++ * @ppos: The current "file" position ++ * ++ * This function provides a read implementation for the "enable" debugfs ++ * interface to the hardware latency detector. Can be used to determine ++ * whether the detector is currently enabled ("0\n" or "1\n" returned). ++ */ ++static ssize_t debug_enable_fread(struct file *filp, char __user *ubuf, ++ size_t cnt, loff_t *ppos) ++{ ++ char buf[4]; ++ ++ if ((cnt < sizeof(buf)) || (*ppos)) ++ return 0; ++ ++ buf[0] = enabled ? '1' : '0'; ++ buf[1] = '\n'; ++ buf[2] = '\0'; ++ if (copy_to_user(ubuf, buf, strlen(buf))) ++ return -EFAULT; ++ return *ppos = strlen(buf); ++} ++ ++/** ++ * debug_enable_fwrite - Write function for "enable" debugfs interface ++ * @filp: The active open file structure for the debugfs "file" ++ * @ubuf: The user buffer that contains the value to write ++ * @cnt: The maximum number of bytes to write to "file" ++ * @ppos: The current position in the debugfs "file" ++ * ++ * This function provides a write implementation for the "enable" debugfs ++ * interface to the hardware latency detector. Can be used to enable or ++ * disable the detector, which will have the side-effect of possibly ++ * also resetting the global stats and kicking off the measuring ++ * kthread (on an enable) or the converse (upon a disable). ++ */ ++static ssize_t debug_enable_fwrite(struct file *filp, ++ const char __user *ubuf, ++ size_t cnt, ++ loff_t *ppos) ++{ ++ char buf[4]; ++ int csize = min(cnt, sizeof(buf)); ++ long val = 0; ++ int err = 0; ++ ++ memset(buf, '\0', sizeof(buf)); ++ if (copy_from_user(buf, ubuf, csize)) ++ return -EFAULT; ++ ++ buf[sizeof(buf)-1] = '\0'; /* just in case */ ++ err = kstrtoul(buf, 10, &val); ++ if (err) ++ return -EINVAL; ++ ++ if (val) { ++ if (enabled) ++ goto unlock; ++ enabled = 1; ++ __reset_stats(); ++ if (start_kthread()) ++ return -EFAULT; ++ } else { ++ if (!enabled) ++ goto unlock; ++ enabled = 0; ++ err = stop_kthread(); ++ if (err) { ++ pr_err(BANNER "cannot stop kthread\n"); ++ return -EFAULT; ++ } ++ wake_up(&data.wq); /* reader(s) should return */ ++ } ++unlock: ++ return csize; ++} ++ ++/** ++ * debug_max_fopen - Open function for "max" debugfs entry ++ * @inode: The in-kernel inode representation of the debugfs "file" ++ * @filp: The active open file structure for the debugfs "file" ++ * ++ * This function provides an open implementation for the "max" debugfs ++ * interface to the hardware latency detector. ++ */ ++static int debug_max_fopen(struct inode *inode, struct file *filp) ++{ ++ return 0; ++} ++ ++/** ++ * debug_max_fread - Read function for "max" debugfs entry ++ * @filp: The active open file structure for the debugfs "file" ++ * @ubuf: The userspace provided buffer to read value into ++ * @cnt: The maximum number of bytes to read ++ * @ppos: The current "file" position ++ * ++ * This function provides a read implementation for the "max" debugfs ++ * interface to the hardware latency detector. Can be used to determine ++ * the maximum latency value observed since it was last reset. ++ */ ++static ssize_t debug_max_fread(struct file *filp, char __user *ubuf, ++ size_t cnt, loff_t *ppos) ++{ ++ return simple_data_read(filp, ubuf, cnt, ppos, &data.max_sample); ++} ++ ++/** ++ * debug_max_fwrite - Write function for "max" debugfs entry ++ * @filp: The active open file structure for the debugfs "file" ++ * @ubuf: The user buffer that contains the value to write ++ * @cnt: The maximum number of bytes to write to "file" ++ * @ppos: The current position in the debugfs "file" ++ * ++ * This function provides a write implementation for the "max" debugfs ++ * interface to the hardware latency detector. Can be used to reset the ++ * maximum or set it to some other desired value - if, then, subsequent ++ * measurements exceed this value, the maximum will be updated. ++ */ ++static ssize_t debug_max_fwrite(struct file *filp, ++ const char __user *ubuf, ++ size_t cnt, ++ loff_t *ppos) ++{ ++ return simple_data_write(filp, ubuf, cnt, ppos, &data.max_sample); ++} ++ ++ ++/** ++ * debug_sample_fopen - An open function for "sample" debugfs interface ++ * @inode: The in-kernel inode representation of this debugfs "file" ++ * @filp: The active open file structure for the debugfs "file" ++ * ++ * This function handles opening the "sample" file within the hardware ++ * latency detector debugfs directory interface. This file is used to read ++ * raw samples from the global ring_buffer and allows the user to see a ++ * running latency history. Can be opened blocking or non-blocking, ++ * affecting whether it behaves as a buffer read pipe, or does not. ++ * Implements simple locking to prevent multiple simultaneous use. ++ */ ++static int debug_sample_fopen(struct inode *inode, struct file *filp) ++{ ++ if (!atomic_add_unless(&data.sample_open, 1, 1)) ++ return -EBUSY; ++ else ++ return 0; ++} ++ ++/** ++ * debug_sample_fread - A read function for "sample" debugfs interface ++ * @filp: The active open file structure for the debugfs "file" ++ * @ubuf: The user buffer that will contain the samples read ++ * @cnt: The maximum bytes to read from the debugfs "file" ++ * @ppos: The current position in the debugfs "file" ++ * ++ * This function handles reading from the "sample" file within the hardware ++ * latency detector debugfs directory interface. This file is used to read ++ * raw samples from the global ring_buffer and allows the user to see a ++ * running latency history. By default this will block pending a new ++ * value written into the sample buffer, unless there are already a ++ * number of value(s) waiting in the buffer, or the sample file was ++ * previously opened in a non-blocking mode of operation. ++ */ ++static ssize_t debug_sample_fread(struct file *filp, char __user *ubuf, ++ size_t cnt, loff_t *ppos) ++{ ++ int len = 0; ++ char buf[64]; ++ struct sample *sample = NULL; ++ ++ if (!enabled) ++ return 0; ++ ++ sample = kzalloc(sizeof(struct sample), GFP_KERNEL); ++ if (!sample) ++ return -ENOMEM; ++ ++ while (!buffer_get_sample(sample)) { ++ ++ DEFINE_WAIT(wait); ++ ++ if (filp->f_flags & O_NONBLOCK) { ++ len = -EAGAIN; ++ goto out; ++ } ++ ++ prepare_to_wait(&data.wq, &wait, TASK_INTERRUPTIBLE); ++ schedule(); ++ finish_wait(&data.wq, &wait); ++ ++ if (signal_pending(current)) { ++ len = -EINTR; ++ goto out; ++ } ++ ++ if (!enabled) { /* enable was toggled */ ++ len = 0; ++ goto out; ++ } ++ } ++ ++ len = snprintf(buf, sizeof(buf), "%010lu.%010lu\t%llu\t%llu\n", ++ sample->timestamp.tv_sec, ++ sample->timestamp.tv_nsec, ++ sample->duration, ++ sample->outer_duration); ++ ++ ++ /* handling partial reads is more trouble than it's worth */ ++ if (len > cnt) ++ goto out; ++ ++ if (copy_to_user(ubuf, buf, len)) ++ len = -EFAULT; ++ ++out: ++ kfree(sample); ++ return len; ++} ++ ++/** ++ * debug_sample_release - Release function for "sample" debugfs interface ++ * @inode: The in-kernel inode represenation of the debugfs "file" ++ * @filp: The active open file structure for the debugfs "file" ++ * ++ * This function completes the close of the debugfs interface "sample" file. ++ * Frees the sample_open "lock" so that other users may open the interface. ++ */ ++static int debug_sample_release(struct inode *inode, struct file *filp) ++{ ++ atomic_dec(&data.sample_open); ++ ++ return 0; ++} ++ ++/** ++ * debug_threshold_fopen - Open function for "threshold" debugfs entry ++ * @inode: The in-kernel inode representation of the debugfs "file" ++ * @filp: The active open file structure for the debugfs "file" ++ * ++ * This function provides an open implementation for the "threshold" debugfs ++ * interface to the hardware latency detector. ++ */ ++static int debug_threshold_fopen(struct inode *inode, struct file *filp) ++{ ++ return 0; ++} ++ ++/** ++ * debug_threshold_fread - Read function for "threshold" debugfs entry ++ * @filp: The active open file structure for the debugfs "file" ++ * @ubuf: The userspace provided buffer to read value into ++ * @cnt: The maximum number of bytes to read ++ * @ppos: The current "file" position ++ * ++ * This function provides a read implementation for the "threshold" debugfs ++ * interface to the hardware latency detector. It can be used to determine ++ * the current threshold level at which a latency will be recorded in the ++ * global ring buffer, typically on the order of 10us. ++ */ ++static ssize_t debug_threshold_fread(struct file *filp, char __user *ubuf, ++ size_t cnt, loff_t *ppos) ++{ ++ return simple_data_read(filp, ubuf, cnt, ppos, &data.threshold); ++} ++ ++/** ++ * debug_threshold_fwrite - Write function for "threshold" debugfs entry ++ * @filp: The active open file structure for the debugfs "file" ++ * @ubuf: The user buffer that contains the value to write ++ * @cnt: The maximum number of bytes to write to "file" ++ * @ppos: The current position in the debugfs "file" ++ * ++ * This function provides a write implementation for the "threshold" debugfs ++ * interface to the hardware latency detector. It can be used to configure ++ * the threshold level at which any subsequently detected latencies will ++ * be recorded into the global ring buffer. ++ */ ++static ssize_t debug_threshold_fwrite(struct file *filp, ++ const char __user *ubuf, ++ size_t cnt, ++ loff_t *ppos) ++{ ++ int ret; ++ ++ ret = simple_data_write(filp, ubuf, cnt, ppos, &data.threshold); ++ ++ if (enabled) ++ wake_up_process(kthread); ++ ++ return ret; ++} ++ ++/** ++ * debug_width_fopen - Open function for "width" debugfs entry ++ * @inode: The in-kernel inode representation of the debugfs "file" ++ * @filp: The active open file structure for the debugfs "file" ++ * ++ * This function provides an open implementation for the "width" debugfs ++ * interface to the hardware latency detector. ++ */ ++static int debug_width_fopen(struct inode *inode, struct file *filp) ++{ ++ return 0; ++} ++ ++/** ++ * debug_width_fread - Read function for "width" debugfs entry ++ * @filp: The active open file structure for the debugfs "file" ++ * @ubuf: The userspace provided buffer to read value into ++ * @cnt: The maximum number of bytes to read ++ * @ppos: The current "file" position ++ * ++ * This function provides a read implementation for the "width" debugfs ++ * interface to the hardware latency detector. It can be used to determine ++ * for how many us of the total window us we will actively sample for any ++ * hardware-induced latecy periods. Obviously, it is not possible to ++ * sample constantly and have the system respond to a sample reader, or, ++ * worse, without having the system appear to have gone out to lunch. ++ */ ++static ssize_t debug_width_fread(struct file *filp, char __user *ubuf, ++ size_t cnt, loff_t *ppos) ++{ ++ return simple_data_read(filp, ubuf, cnt, ppos, &data.sample_width); ++} ++ ++/** ++ * debug_width_fwrite - Write function for "width" debugfs entry ++ * @filp: The active open file structure for the debugfs "file" ++ * @ubuf: The user buffer that contains the value to write ++ * @cnt: The maximum number of bytes to write to "file" ++ * @ppos: The current position in the debugfs "file" ++ * ++ * This function provides a write implementation for the "width" debugfs ++ * interface to the hardware latency detector. It can be used to configure ++ * for how many us of the total window us we will actively sample for any ++ * hardware-induced latency periods. Obviously, it is not possible to ++ * sample constantly and have the system respond to a sample reader, or, ++ * worse, without having the system appear to have gone out to lunch. It ++ * is enforced that width is less that the total window size. ++ */ ++static ssize_t debug_width_fwrite(struct file *filp, ++ const char __user *ubuf, ++ size_t cnt, ++ loff_t *ppos) ++{ ++ char buf[U64STR_SIZE]; ++ int csize = min(cnt, sizeof(buf)); ++ u64 val = 0; ++ int err = 0; ++ ++ memset(buf, '\0', sizeof(buf)); ++ if (copy_from_user(buf, ubuf, csize)) ++ return -EFAULT; ++ ++ buf[U64STR_SIZE-1] = '\0'; /* just in case */ ++ err = kstrtoull(buf, 10, &val); ++ if (err) ++ return -EINVAL; ++ ++ mutex_lock(&data.lock); ++ if (val < data.sample_window) ++ data.sample_width = val; ++ else { ++ mutex_unlock(&data.lock); ++ return -EINVAL; ++ } ++ mutex_unlock(&data.lock); ++ ++ if (enabled) ++ wake_up_process(kthread); ++ ++ return csize; ++} ++ ++/** ++ * debug_window_fopen - Open function for "window" debugfs entry ++ * @inode: The in-kernel inode representation of the debugfs "file" ++ * @filp: The active open file structure for the debugfs "file" ++ * ++ * This function provides an open implementation for the "window" debugfs ++ * interface to the hardware latency detector. The window is the total time ++ * in us that will be considered one sample period. Conceptually, windows ++ * occur back-to-back and contain a sample width period during which ++ * actual sampling occurs. ++ */ ++static int debug_window_fopen(struct inode *inode, struct file *filp) ++{ ++ return 0; ++} ++ ++/** ++ * debug_window_fread - Read function for "window" debugfs entry ++ * @filp: The active open file structure for the debugfs "file" ++ * @ubuf: The userspace provided buffer to read value into ++ * @cnt: The maximum number of bytes to read ++ * @ppos: The current "file" position ++ * ++ * This function provides a read implementation for the "window" debugfs ++ * interface to the hardware latency detector. The window is the total time ++ * in us that will be considered one sample period. Conceptually, windows ++ * occur back-to-back and contain a sample width period during which ++ * actual sampling occurs. Can be used to read the total window size. ++ */ ++static ssize_t debug_window_fread(struct file *filp, char __user *ubuf, ++ size_t cnt, loff_t *ppos) ++{ ++ return simple_data_read(filp, ubuf, cnt, ppos, &data.sample_window); ++} ++ ++/** ++ * debug_window_fwrite - Write function for "window" debugfs entry ++ * @filp: The active open file structure for the debugfs "file" ++ * @ubuf: The user buffer that contains the value to write ++ * @cnt: The maximum number of bytes to write to "file" ++ * @ppos: The current position in the debugfs "file" ++ * ++ * This function provides a write implementation for the "window" debufds ++ * interface to the hardware latency detetector. The window is the total time ++ * in us that will be considered one sample period. Conceptually, windows ++ * occur back-to-back and contain a sample width period during which ++ * actual sampling occurs. Can be used to write a new total window size. It ++ * is enfoced that any value written must be greater than the sample width ++ * size, or an error results. ++ */ ++static ssize_t debug_window_fwrite(struct file *filp, ++ const char __user *ubuf, ++ size_t cnt, ++ loff_t *ppos) ++{ ++ char buf[U64STR_SIZE]; ++ int csize = min(cnt, sizeof(buf)); ++ u64 val = 0; ++ int err = 0; ++ ++ memset(buf, '\0', sizeof(buf)); ++ if (copy_from_user(buf, ubuf, csize)) ++ return -EFAULT; ++ ++ buf[U64STR_SIZE-1] = '\0'; /* just in case */ ++ err = kstrtoull(buf, 10, &val); ++ if (err) ++ return -EINVAL; ++ ++ mutex_lock(&data.lock); ++ if (data.sample_width < val) ++ data.sample_window = val; ++ else { ++ mutex_unlock(&data.lock); ++ return -EINVAL; ++ } ++ mutex_unlock(&data.lock); ++ ++ return csize; ++} ++ ++/* ++ * Function pointers for the "count" debugfs file operations ++ */ ++static const struct file_operations count_fops = { ++ .open = debug_count_fopen, ++ .read = debug_count_fread, ++ .write = debug_count_fwrite, ++ .owner = THIS_MODULE, ++}; ++ ++/* ++ * Function pointers for the "enable" debugfs file operations ++ */ ++static const struct file_operations enable_fops = { ++ .open = debug_enable_fopen, ++ .read = debug_enable_fread, ++ .write = debug_enable_fwrite, ++ .owner = THIS_MODULE, ++}; ++ ++/* ++ * Function pointers for the "max" debugfs file operations ++ */ ++static const struct file_operations max_fops = { ++ .open = debug_max_fopen, ++ .read = debug_max_fread, ++ .write = debug_max_fwrite, ++ .owner = THIS_MODULE, ++}; ++ ++/* ++ * Function pointers for the "sample" debugfs file operations ++ */ ++static const struct file_operations sample_fops = { ++ .open = debug_sample_fopen, ++ .read = debug_sample_fread, ++ .release = debug_sample_release, ++ .owner = THIS_MODULE, ++}; ++ ++/* ++ * Function pointers for the "threshold" debugfs file operations ++ */ ++static const struct file_operations threshold_fops = { ++ .open = debug_threshold_fopen, ++ .read = debug_threshold_fread, ++ .write = debug_threshold_fwrite, ++ .owner = THIS_MODULE, ++}; ++ ++/* ++ * Function pointers for the "width" debugfs file operations ++ */ ++static const struct file_operations width_fops = { ++ .open = debug_width_fopen, ++ .read = debug_width_fread, ++ .write = debug_width_fwrite, ++ .owner = THIS_MODULE, ++}; ++ ++/* ++ * Function pointers for the "window" debugfs file operations ++ */ ++static const struct file_operations window_fops = { ++ .open = debug_window_fopen, ++ .read = debug_window_fread, ++ .write = debug_window_fwrite, ++ .owner = THIS_MODULE, ++}; ++ ++/** ++ * init_debugfs - A function to initialize the debugfs interface files ++ * ++ * This function creates entries in debugfs for "hwlat_detector", including ++ * files to read values from the detector, current samples, and the ++ * maximum sample that has been captured since the hardware latency ++ * dectector was started. ++ */ ++static int init_debugfs(void) ++{ ++ int ret = -ENOMEM; ++ ++ debug_dir = debugfs_create_dir(DRVNAME, NULL); ++ if (!debug_dir) ++ goto err_debug_dir; ++ ++ debug_sample = debugfs_create_file("sample", 0444, ++ debug_dir, NULL, ++ &sample_fops); ++ if (!debug_sample) ++ goto err_sample; ++ ++ debug_count = debugfs_create_file("count", 0444, ++ debug_dir, NULL, ++ &count_fops); ++ if (!debug_count) ++ goto err_count; ++ ++ debug_max = debugfs_create_file("max", 0444, ++ debug_dir, NULL, ++ &max_fops); ++ if (!debug_max) ++ goto err_max; ++ ++ debug_sample_window = debugfs_create_file("window", 0644, ++ debug_dir, NULL, ++ &window_fops); ++ if (!debug_sample_window) ++ goto err_window; ++ ++ debug_sample_width = debugfs_create_file("width", 0644, ++ debug_dir, NULL, ++ &width_fops); ++ if (!debug_sample_width) ++ goto err_width; ++ ++ debug_threshold = debugfs_create_file("threshold", 0644, ++ debug_dir, NULL, ++ &threshold_fops); ++ if (!debug_threshold) ++ goto err_threshold; ++ ++ debug_enable = debugfs_create_file("enable", 0644, ++ debug_dir, &enabled, ++ &enable_fops); ++ if (!debug_enable) ++ goto err_enable; ++ ++ else { ++ ret = 0; ++ goto out; ++ } ++ ++err_enable: ++ debugfs_remove(debug_threshold); ++err_threshold: ++ debugfs_remove(debug_sample_width); ++err_width: ++ debugfs_remove(debug_sample_window); ++err_window: ++ debugfs_remove(debug_max); ++err_max: ++ debugfs_remove(debug_count); ++err_count: ++ debugfs_remove(debug_sample); ++err_sample: ++ debugfs_remove(debug_dir); ++err_debug_dir: ++out: ++ return ret; ++} ++ ++/** ++ * free_debugfs - A function to cleanup the debugfs file interface ++ */ ++static void free_debugfs(void) ++{ ++ /* could also use a debugfs_remove_recursive */ ++ debugfs_remove(debug_enable); ++ debugfs_remove(debug_threshold); ++ debugfs_remove(debug_sample_width); ++ debugfs_remove(debug_sample_window); ++ debugfs_remove(debug_max); ++ debugfs_remove(debug_count); ++ debugfs_remove(debug_sample); ++ debugfs_remove(debug_dir); ++} ++ ++/** ++ * detector_init - Standard module initialization code ++ */ ++static int detector_init(void) ++{ ++ int ret = -ENOMEM; ++ ++ pr_info(BANNER "version %s\n", VERSION); ++ ++ ret = init_stats(); ++ if (ret) ++ goto out; ++ ++ ret = init_debugfs(); ++ if (ret) ++ goto err_stats; ++ ++ if (enabled) ++ ret = start_kthread(); ++ ++ goto out; ++ ++err_stats: ++ ring_buffer_free(ring_buffer); ++out: ++ return ret; ++ ++} ++ ++/** ++ * detector_exit - Standard module cleanup code ++ */ ++static void detector_exit(void) ++{ ++ int err; ++ ++ if (enabled) { ++ enabled = 0; ++ err = stop_kthread(); ++ if (err) ++ pr_err(BANNER "cannot stop kthread\n"); ++ } ++ ++ free_debugfs(); ++ ring_buffer_free(ring_buffer); /* free up the ring buffer */ ++ ++} ++ ++module_init(detector_init); ++module_exit(detector_exit); +diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c +index df990bb8c873..1a162709a85e 100644 +--- a/drivers/mmc/host/mmci.c ++++ b/drivers/mmc/host/mmci.c +@@ -1147,15 +1147,12 @@ static irqreturn_t mmci_pio_irq(int irq, void *dev_id) + struct sg_mapping_iter *sg_miter = &host->sg_miter; + struct variant_data *variant = host->variant; + void __iomem *base = host->base; +- unsigned long flags; + u32 status; + + status = readl(base + MMCISTATUS); + + dev_dbg(mmc_dev(host->mmc), "irq1 (pio) %08x\n", status); + +- local_irq_save(flags); +- + do { + unsigned int remain, len; + char *buffer; +@@ -1195,8 +1192,6 @@ static irqreturn_t mmci_pio_irq(int irq, void *dev_id) + + sg_miter_stop(sg_miter); + +- local_irq_restore(flags); +- + /* + * If we have less than the fifo 'half-full' threshold to transfer, + * trigger a PIO interrupt as soon as any data is available. +diff --git a/drivers/net/ethernet/3com/3c59x.c b/drivers/net/ethernet/3com/3c59x.c +index 25c55ab05c7d..5a1d117a8744 100644 +--- a/drivers/net/ethernet/3com/3c59x.c ++++ b/drivers/net/ethernet/3com/3c59x.c +@@ -842,9 +842,9 @@ static void poll_vortex(struct net_device *dev) + { + struct vortex_private *vp = netdev_priv(dev); + unsigned long flags; +- local_irq_save(flags); ++ local_irq_save_nort(flags); + (vp->full_bus_master_rx ? boomerang_interrupt:vortex_interrupt)(dev->irq,dev); +- local_irq_restore(flags); ++ local_irq_restore_nort(flags); + } + #endif + +@@ -1910,12 +1910,12 @@ static void vortex_tx_timeout(struct net_device *dev) + * Block interrupts because vortex_interrupt does a bare spin_lock() + */ + unsigned long flags; +- local_irq_save(flags); ++ local_irq_save_nort(flags); + if (vp->full_bus_master_tx) + boomerang_interrupt(dev->irq, dev); + else + vortex_interrupt(dev->irq, dev); +- local_irq_restore(flags); ++ local_irq_restore_nort(flags); + } + } + +diff --git a/drivers/net/ethernet/realtek/8139too.c b/drivers/net/ethernet/realtek/8139too.c +index da4c2d8a4173..1420dfb56bac 100644 +--- a/drivers/net/ethernet/realtek/8139too.c ++++ b/drivers/net/ethernet/realtek/8139too.c +@@ -2233,7 +2233,7 @@ static void rtl8139_poll_controller(struct net_device *dev) + struct rtl8139_private *tp = netdev_priv(dev); + const int irq = tp->pci_dev->irq; + +- disable_irq(irq); ++ disable_irq_nosync(irq); + rtl8139_interrupt(irq, dev); + enable_irq(irq); + } +diff --git a/drivers/net/wireless/intersil/orinoco/orinoco_usb.c b/drivers/net/wireless/intersil/orinoco/orinoco_usb.c +index 56f109bc8394..02afc796bc71 100644 +--- a/drivers/net/wireless/intersil/orinoco/orinoco_usb.c ++++ b/drivers/net/wireless/intersil/orinoco/orinoco_usb.c +@@ -697,7 +697,7 @@ static void ezusb_req_ctx_wait(struct ezusb_priv *upriv, + while (!ctx->done.done && msecs--) + udelay(1000); + } else { +- wait_event_interruptible(ctx->done.wait, ++ swait_event_interruptible(ctx->done.wait, + ctx->done.done); + } + break; +diff --git a/drivers/pci/access.c b/drivers/pci/access.c +index d11cdbb8fba3..223bbb9acb03 100644 +--- a/drivers/pci/access.c ++++ b/drivers/pci/access.c +@@ -672,7 +672,7 @@ void pci_cfg_access_unlock(struct pci_dev *dev) + WARN_ON(!dev->block_cfg_access); + + dev->block_cfg_access = 0; +- wake_up_all(&pci_cfg_wait); ++ wake_up_all_locked(&pci_cfg_wait); + raw_spin_unlock_irqrestore(&pci_lock, flags); + } + EXPORT_SYMBOL_GPL(pci_cfg_access_unlock); +diff --git a/drivers/scsi/fcoe/fcoe.c b/drivers/scsi/fcoe/fcoe.c +index 9bd41a35a78a..8e2d436c2e3f 100644 +--- a/drivers/scsi/fcoe/fcoe.c ++++ b/drivers/scsi/fcoe/fcoe.c +@@ -1455,11 +1455,11 @@ static int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev, + static int fcoe_alloc_paged_crc_eof(struct sk_buff *skb, int tlen) + { + struct fcoe_percpu_s *fps; +- int rc; ++ int rc, cpu = get_cpu_light(); + +- fps = &get_cpu_var(fcoe_percpu); ++ fps = &per_cpu(fcoe_percpu, cpu); + rc = fcoe_get_paged_crc_eof(skb, tlen, fps); +- put_cpu_var(fcoe_percpu); ++ put_cpu_light(); + + return rc; + } +@@ -1646,11 +1646,11 @@ static inline int fcoe_filter_frames(struct fc_lport *lport, + return 0; + } + +- stats = per_cpu_ptr(lport->stats, get_cpu()); ++ stats = per_cpu_ptr(lport->stats, get_cpu_light()); + stats->InvalidCRCCount++; + if (stats->InvalidCRCCount < 5) + printk(KERN_WARNING "fcoe: dropping frame with CRC error\n"); +- put_cpu(); ++ put_cpu_light(); + return -EINVAL; + } + +@@ -1693,7 +1693,7 @@ static void fcoe_recv_frame(struct sk_buff *skb) + */ + hp = (struct fcoe_hdr *) skb_network_header(skb); + +- stats = per_cpu_ptr(lport->stats, get_cpu()); ++ stats = per_cpu_ptr(lport->stats, get_cpu_light()); + if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) { + if (stats->ErrorFrames < 5) + printk(KERN_WARNING "fcoe: FCoE version " +@@ -1725,13 +1725,13 @@ static void fcoe_recv_frame(struct sk_buff *skb) + goto drop; + + if (!fcoe_filter_frames(lport, fp)) { +- put_cpu(); ++ put_cpu_light(); + fc_exch_recv(lport, fp); + return; + } + drop: + stats->ErrorFrames++; +- put_cpu(); ++ put_cpu_light(); + kfree_skb(skb); + } + +diff --git a/drivers/scsi/fcoe/fcoe_ctlr.c b/drivers/scsi/fcoe/fcoe_ctlr.c +index dcf36537a767..1a1f2e46452c 100644 +--- a/drivers/scsi/fcoe/fcoe_ctlr.c ++++ b/drivers/scsi/fcoe/fcoe_ctlr.c +@@ -834,7 +834,7 @@ static unsigned long fcoe_ctlr_age_fcfs(struct fcoe_ctlr *fip) + + INIT_LIST_HEAD(&del_list); + +- stats = per_cpu_ptr(fip->lp->stats, get_cpu()); ++ stats = per_cpu_ptr(fip->lp->stats, get_cpu_light()); + + list_for_each_entry_safe(fcf, next, &fip->fcfs, list) { + deadline = fcf->time + fcf->fka_period + fcf->fka_period / 2; +@@ -870,7 +870,7 @@ static unsigned long fcoe_ctlr_age_fcfs(struct fcoe_ctlr *fip) + sel_time = fcf->time; + } + } +- put_cpu(); ++ put_cpu_light(); + + list_for_each_entry_safe(fcf, next, &del_list, list) { + /* Removes fcf from current list */ +diff --git a/drivers/scsi/libfc/fc_exch.c b/drivers/scsi/libfc/fc_exch.c +index e72673b0a8fb..da598a6caa22 100644 +--- a/drivers/scsi/libfc/fc_exch.c ++++ b/drivers/scsi/libfc/fc_exch.c +@@ -814,10 +814,10 @@ static struct fc_exch *fc_exch_em_alloc(struct fc_lport *lport, + } + memset(ep, 0, sizeof(*ep)); + +- cpu = get_cpu(); ++ cpu = get_cpu_light(); + pool = per_cpu_ptr(mp->pool, cpu); + spin_lock_bh(&pool->lock); +- put_cpu(); ++ put_cpu_light(); + + /* peek cache of free slot */ + if (pool->left != FC_XID_UNKNOWN) { +diff --git a/drivers/scsi/libsas/sas_ata.c b/drivers/scsi/libsas/sas_ata.c +index 763f012fdeca..d0f61b595470 100644 +--- a/drivers/scsi/libsas/sas_ata.c ++++ b/drivers/scsi/libsas/sas_ata.c +@@ -190,7 +190,7 @@ static unsigned int sas_ata_qc_issue(struct ata_queued_cmd *qc) + /* TODO: audit callers to ensure they are ready for qc_issue to + * unconditionally re-enable interrupts + */ +- local_irq_save(flags); ++ local_irq_save_nort(flags); + spin_unlock(ap->lock); + + /* If the device fell off, no sense in issuing commands */ +@@ -252,7 +252,7 @@ static unsigned int sas_ata_qc_issue(struct ata_queued_cmd *qc) + + out: + spin_lock(ap->lock); +- local_irq_restore(flags); ++ local_irq_restore_nort(flags); + return ret; + } + +diff --git a/drivers/scsi/qla2xxx/qla_inline.h b/drivers/scsi/qla2xxx/qla_inline.h +index edc48f3b8230..ee5c6f9dfb6f 100644 +--- a/drivers/scsi/qla2xxx/qla_inline.h ++++ b/drivers/scsi/qla2xxx/qla_inline.h +@@ -59,12 +59,12 @@ qla2x00_poll(struct rsp_que *rsp) + { + unsigned long flags; + struct qla_hw_data *ha = rsp->hw; +- local_irq_save(flags); ++ local_irq_save_nort(flags); + if (IS_P3P_TYPE(ha)) + qla82xx_poll(0, rsp); + else + ha->isp_ops->intr_handler(0, rsp); +- local_irq_restore(flags); ++ local_irq_restore_nort(flags); + } + + static inline uint8_t * +diff --git a/drivers/scsi/qla2xxx/qla_isr.c b/drivers/scsi/qla2xxx/qla_isr.c +index 987f1c729e9c..18391e07d70f 100644 +--- a/drivers/scsi/qla2xxx/qla_isr.c ++++ b/drivers/scsi/qla2xxx/qla_isr.c +@@ -3125,7 +3125,11 @@ qla24xx_enable_msix(struct qla_hw_data *ha, struct rsp_que *rsp) + * kref_put(). + */ + kref_get(&qentry->irq_notify.kref); ++#ifdef CONFIG_PREEMPT_RT_BASE ++ swork_queue(&qentry->irq_notify.swork); ++#else + schedule_work(&qentry->irq_notify.work); ++#endif + } + + /* +diff --git a/drivers/thermal/x86_pkg_temp_thermal.c b/drivers/thermal/x86_pkg_temp_thermal.c +index 97f0a2bd93ed..a4f45aaa9ad4 100644 +--- a/drivers/thermal/x86_pkg_temp_thermal.c ++++ b/drivers/thermal/x86_pkg_temp_thermal.c +@@ -29,6 +29,7 @@ + #include <linux/pm.h> + #include <linux/thermal.h> + #include <linux/debugfs.h> ++#include <linux/swork.h> + #include <asm/cpu_device_id.h> + #include <asm/mce.h> + +@@ -352,7 +353,7 @@ static void pkg_temp_thermal_threshold_work_fn(struct work_struct *work) + } + } + +-static int pkg_temp_thermal_platform_thermal_notify(__u64 msr_val) ++static void platform_thermal_notify_work(struct swork_event *event) + { + unsigned long flags; + int cpu = smp_processor_id(); +@@ -369,7 +370,7 @@ static int pkg_temp_thermal_platform_thermal_notify(__u64 msr_val) + pkg_work_scheduled[phy_id]) { + disable_pkg_thres_interrupt(); + spin_unlock_irqrestore(&pkg_work_lock, flags); +- return -EINVAL; ++ return; + } + pkg_work_scheduled[phy_id] = 1; + spin_unlock_irqrestore(&pkg_work_lock, flags); +@@ -378,9 +379,48 @@ static int pkg_temp_thermal_platform_thermal_notify(__u64 msr_val) + schedule_delayed_work_on(cpu, + &per_cpu(pkg_temp_thermal_threshold_work, cpu), + msecs_to_jiffies(notify_delay_ms)); ++} ++ ++#ifdef CONFIG_PREEMPT_RT_FULL ++static struct swork_event notify_work; ++ ++static int thermal_notify_work_init(void) ++{ ++ int err; ++ ++ err = swork_get(); ++ if (err) ++ return err; ++ ++ INIT_SWORK(¬ify_work, platform_thermal_notify_work); + return 0; + } + ++static void thermal_notify_work_cleanup(void) ++{ ++ swork_put(); ++} ++ ++static int pkg_temp_thermal_platform_thermal_notify(__u64 msr_val) ++{ ++ swork_queue(¬ify_work); ++ return 0; ++} ++ ++#else /* !CONFIG_PREEMPT_RT_FULL */ ++ ++static int thermal_notify_work_init(void) { return 0; } ++ ++static void thermal_notify_work_cleanup(void) { } ++ ++static int pkg_temp_thermal_platform_thermal_notify(__u64 msr_val) ++{ ++ platform_thermal_notify_work(NULL); ++ ++ return 0; ++} ++#endif /* CONFIG_PREEMPT_RT_FULL */ ++ + static int find_siblings_cpu(int cpu) + { + int i; +@@ -584,6 +624,9 @@ static int __init pkg_temp_thermal_init(void) + if (!x86_match_cpu(pkg_temp_thermal_ids)) + return -ENODEV; + ++ if (!thermal_notify_work_init()) ++ return -ENODEV; ++ + spin_lock_init(&pkg_work_lock); + platform_thermal_package_notify = + pkg_temp_thermal_platform_thermal_notify; +@@ -608,7 +651,7 @@ static int __init pkg_temp_thermal_init(void) + kfree(pkg_work_scheduled); + platform_thermal_package_notify = NULL; + platform_thermal_package_rate_control = NULL; +- ++ thermal_notify_work_cleanup(); + return -ENODEV; + } + +@@ -633,6 +676,7 @@ static void __exit pkg_temp_thermal_exit(void) + mutex_unlock(&phy_dev_list_mutex); + platform_thermal_package_notify = NULL; + platform_thermal_package_rate_control = NULL; ++ thermal_notify_work_cleanup(); + for_each_online_cpu(i) + cancel_delayed_work_sync( + &per_cpu(pkg_temp_thermal_threshold_work, i)); +diff --git a/drivers/tty/serial/8250/8250_core.c b/drivers/tty/serial/8250/8250_core.c +index dcf43f66404f..a9ae57122841 100644 +--- a/drivers/tty/serial/8250/8250_core.c ++++ b/drivers/tty/serial/8250/8250_core.c +@@ -58,7 +58,16 @@ static struct uart_driver serial8250_reg; + + static unsigned int skip_txen_test; /* force skip of txen test at init time */ + +-#define PASS_LIMIT 512 ++/* ++ * On -rt we can have a more delays, and legitimately ++ * so - so don't drop work spuriously and spam the ++ * syslog: ++ */ ++#ifdef CONFIG_PREEMPT_RT_FULL ++# define PASS_LIMIT 1000000 ++#else ++# define PASS_LIMIT 512 ++#endif + + #include <asm/serial.h> + /* +diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c +index 858a54633664..fc44fb59aef6 100644 +--- a/drivers/tty/serial/8250/8250_port.c ++++ b/drivers/tty/serial/8250/8250_port.c +@@ -35,6 +35,7 @@ + #include <linux/nmi.h> + #include <linux/mutex.h> + #include <linux/slab.h> ++#include <linux/kdb.h> + #include <linux/uaccess.h> + #include <linux/pm_runtime.h> + #include <linux/timer.h> +@@ -3109,9 +3110,9 @@ void serial8250_console_write(struct uart_8250_port *up, const char *s, + + serial8250_rpm_get(up); + +- if (port->sysrq) ++ if (port->sysrq || oops_in_progress) + locked = 0; +- else if (oops_in_progress) ++ else if (in_kdb_printk()) + locked = spin_trylock_irqsave(&port->lock, flags); + else + spin_lock_irqsave(&port->lock, flags); +diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c +index 8a9e213387a7..dd1f9a426b74 100644 +--- a/drivers/tty/serial/amba-pl011.c ++++ b/drivers/tty/serial/amba-pl011.c +@@ -2167,13 +2167,19 @@ pl011_console_write(struct console *co, const char *s, unsigned int count) + + clk_enable(uap->clk); + +- local_irq_save(flags); ++ /* ++ * local_irq_save(flags); ++ * ++ * This local_irq_save() is nonsense. If we come in via sysrq ++ * handling then interrupts are already disabled. Aside of ++ * that the port.sysrq check is racy on SMP regardless. ++ */ + if (uap->port.sysrq) + locked = 0; + else if (oops_in_progress) +- locked = spin_trylock(&uap->port.lock); ++ locked = spin_trylock_irqsave(&uap->port.lock, flags); + else +- spin_lock(&uap->port.lock); ++ spin_lock_irqsave(&uap->port.lock, flags); + + /* + * First save the CR then disable the interrupts +@@ -2197,8 +2203,7 @@ pl011_console_write(struct console *co, const char *s, unsigned int count) + pl011_write(old_cr, uap, REG_CR); + + if (locked) +- spin_unlock(&uap->port.lock); +- local_irq_restore(flags); ++ spin_unlock_irqrestore(&uap->port.lock, flags); + + clk_disable(uap->clk); + } +diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c +index a2a529994ba5..0ee7c4c518df 100644 +--- a/drivers/tty/serial/omap-serial.c ++++ b/drivers/tty/serial/omap-serial.c +@@ -1257,13 +1257,10 @@ serial_omap_console_write(struct console *co, const char *s, + + pm_runtime_get_sync(up->dev); + +- local_irq_save(flags); +- if (up->port.sysrq) +- locked = 0; +- else if (oops_in_progress) +- locked = spin_trylock(&up->port.lock); ++ if (up->port.sysrq || oops_in_progress) ++ locked = spin_trylock_irqsave(&up->port.lock, flags); + else +- spin_lock(&up->port.lock); ++ spin_lock_irqsave(&up->port.lock, flags); + + /* + * First save the IER then disable the interrupts +@@ -1292,8 +1289,7 @@ serial_omap_console_write(struct console *co, const char *s, + pm_runtime_mark_last_busy(up->dev); + pm_runtime_put_autosuspend(up->dev); + if (locked) +- spin_unlock(&up->port.lock); +- local_irq_restore(flags); ++ spin_unlock_irqrestore(&up->port.lock, flags); + } + + static int __init +diff --git a/drivers/tty/serial/sc16is7xx.c b/drivers/tty/serial/sc16is7xx.c +index f36e6df2fa90..e086ea4d2997 100644 +--- a/drivers/tty/serial/sc16is7xx.c ++++ b/drivers/tty/serial/sc16is7xx.c +@@ -1240,7 +1240,7 @@ static int sc16is7xx_probe(struct device *dev, + + /* Setup interrupt */ + ret = devm_request_irq(dev, irq, sc16is7xx_irq, +- IRQF_ONESHOT | flags, dev_name(dev), s); ++ flags, dev_name(dev), s); + if (!ret) + return 0; + +diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c +index d2e3f655c26f..fdd027a9bbd7 100644 +--- a/drivers/usb/core/hcd.c ++++ b/drivers/usb/core/hcd.c +@@ -1760,9 +1760,9 @@ static void __usb_hcd_giveback_urb(struct urb *urb) + * and no one may trigger the above deadlock situation when + * running complete() in tasklet. + */ +- local_irq_save(flags); ++ local_irq_save_nort(flags); + urb->complete(urb); +- local_irq_restore(flags); ++ local_irq_restore_nort(flags); + + usb_anchor_resume_wakeups(anchor); + atomic_dec(&urb->use_count); +diff --git a/drivers/usb/gadget/function/f_fs.c b/drivers/usb/gadget/function/f_fs.c +index 5c8429f23a89..fa835fb1a186 100644 +--- a/drivers/usb/gadget/function/f_fs.c ++++ b/drivers/usb/gadget/function/f_fs.c +@@ -1509,7 +1509,7 @@ static void ffs_data_put(struct ffs_data *ffs) + pr_info("%s(): freeing\n", __func__); + ffs_data_clear(ffs); + BUG_ON(waitqueue_active(&ffs->ev.waitq) || +- waitqueue_active(&ffs->ep0req_completion.wait)); ++ swait_active(&ffs->ep0req_completion.wait)); + kfree(ffs->dev_name); + kfree(ffs); + } +diff --git a/drivers/usb/gadget/legacy/inode.c b/drivers/usb/gadget/legacy/inode.c +index 16104b5ebdcb..5c506c2b88ad 100644 +--- a/drivers/usb/gadget/legacy/inode.c ++++ b/drivers/usb/gadget/legacy/inode.c +@@ -346,7 +346,7 @@ ep_io (struct ep_data *epdata, void *buf, unsigned len) + spin_unlock_irq (&epdata->dev->lock); + + if (likely (value == 0)) { +- value = wait_event_interruptible (done.wait, done.done); ++ value = swait_event_interruptible (done.wait, done.done); + if (value != 0) { + spin_lock_irq (&epdata->dev->lock); + if (likely (epdata->ep != NULL)) { +@@ -355,7 +355,7 @@ ep_io (struct ep_data *epdata, void *buf, unsigned len) + usb_ep_dequeue (epdata->ep, epdata->req); + spin_unlock_irq (&epdata->dev->lock); + +- wait_event (done.wait, done.done); ++ swait_event (done.wait, done.done); + if (epdata->status == -ECONNRESET) + epdata->status = -EINTR; + } else { +diff --git a/fs/aio.c b/fs/aio.c +index 4fe81d1c60f9..e68c06a4a017 100644 +--- a/fs/aio.c ++++ b/fs/aio.c +@@ -40,6 +40,7 @@ + #include <linux/ramfs.h> + #include <linux/percpu-refcount.h> + #include <linux/mount.h> ++#include <linux/swork.h> + + #include <asm/kmap_types.h> + #include <asm/uaccess.h> +@@ -115,7 +116,7 @@ struct kioctx { + struct page **ring_pages; + long nr_pages; + +- struct work_struct free_work; ++ struct swork_event free_work; + + /* + * signals when all in-flight requests are done +@@ -258,6 +259,7 @@ static int __init aio_setup(void) + .mount = aio_mount, + .kill_sb = kill_anon_super, + }; ++ BUG_ON(swork_get()); + aio_mnt = kern_mount(&aio_fs); + if (IS_ERR(aio_mnt)) + panic("Failed to create aio fs mount."); +@@ -578,9 +580,9 @@ static int kiocb_cancel(struct aio_kiocb *kiocb) + return cancel(&kiocb->common); + } + +-static void free_ioctx(struct work_struct *work) ++static void free_ioctx(struct swork_event *sev) + { +- struct kioctx *ctx = container_of(work, struct kioctx, free_work); ++ struct kioctx *ctx = container_of(sev, struct kioctx, free_work); + + pr_debug("freeing %p\n", ctx); + +@@ -599,8 +601,8 @@ static void free_ioctx_reqs(struct percpu_ref *ref) + if (ctx->rq_wait && atomic_dec_and_test(&ctx->rq_wait->count)) + complete(&ctx->rq_wait->comp); + +- INIT_WORK(&ctx->free_work, free_ioctx); +- schedule_work(&ctx->free_work); ++ INIT_SWORK(&ctx->free_work, free_ioctx); ++ swork_queue(&ctx->free_work); + } + + /* +@@ -608,9 +610,9 @@ static void free_ioctx_reqs(struct percpu_ref *ref) + * and ctx->users has dropped to 0, so we know no more kiocbs can be submitted - + * now it's safe to cancel any that need to be. + */ +-static void free_ioctx_users(struct percpu_ref *ref) ++static void free_ioctx_users_work(struct swork_event *sev) + { +- struct kioctx *ctx = container_of(ref, struct kioctx, users); ++ struct kioctx *ctx = container_of(sev, struct kioctx, free_work); + struct aio_kiocb *req; + + spin_lock_irq(&ctx->ctx_lock); +@@ -629,6 +631,14 @@ static void free_ioctx_users(struct percpu_ref *ref) + percpu_ref_put(&ctx->reqs); + } + ++static void free_ioctx_users(struct percpu_ref *ref) ++{ ++ struct kioctx *ctx = container_of(ref, struct kioctx, users); ++ ++ INIT_SWORK(&ctx->free_work, free_ioctx_users_work); ++ swork_queue(&ctx->free_work); ++} ++ + static int ioctx_add_table(struct kioctx *ctx, struct mm_struct *mm) + { + unsigned i, new_nr; +diff --git a/fs/autofs4/autofs_i.h b/fs/autofs4/autofs_i.h +index a439548de785..7c392647d03b 100644 +--- a/fs/autofs4/autofs_i.h ++++ b/fs/autofs4/autofs_i.h +@@ -30,6 +30,7 @@ + #include <linux/sched.h> + #include <linux/mount.h> + #include <linux/namei.h> ++#include <linux/delay.h> + #include <asm/current.h> + #include <linux/uaccess.h> + +diff --git a/fs/autofs4/expire.c b/fs/autofs4/expire.c +index d8e6d421c27f..2e689ab1306b 100644 +--- a/fs/autofs4/expire.c ++++ b/fs/autofs4/expire.c +@@ -148,7 +148,7 @@ static struct dentry *get_next_positive_dentry(struct dentry *prev, + parent = p->d_parent; + if (!spin_trylock(&parent->d_lock)) { + spin_unlock(&p->d_lock); +- cpu_relax(); ++ cpu_chill(); + goto relock; + } + spin_unlock(&p->d_lock); +diff --git a/fs/buffer.c b/fs/buffer.c +index 9c8eb9b6db6a..d15d77f72cf7 100644 +--- a/fs/buffer.c ++++ b/fs/buffer.c +@@ -301,8 +301,7 @@ static void end_buffer_async_read(struct buffer_head *bh, int uptodate) + * decide that the page is now completely done. + */ + first = page_buffers(page); +- local_irq_save(flags); +- bit_spin_lock(BH_Uptodate_Lock, &first->b_state); ++ flags = bh_uptodate_lock_irqsave(first); + clear_buffer_async_read(bh); + unlock_buffer(bh); + tmp = bh; +@@ -315,8 +314,7 @@ static void end_buffer_async_read(struct buffer_head *bh, int uptodate) + } + tmp = tmp->b_this_page; + } while (tmp != bh); +- bit_spin_unlock(BH_Uptodate_Lock, &first->b_state); +- local_irq_restore(flags); ++ bh_uptodate_unlock_irqrestore(first, flags); + + /* + * If none of the buffers had errors and they are all +@@ -328,9 +326,7 @@ static void end_buffer_async_read(struct buffer_head *bh, int uptodate) + return; + + still_busy: +- bit_spin_unlock(BH_Uptodate_Lock, &first->b_state); +- local_irq_restore(flags); +- return; ++ bh_uptodate_unlock_irqrestore(first, flags); + } + + /* +@@ -358,8 +354,7 @@ void end_buffer_async_write(struct buffer_head *bh, int uptodate) + } + + first = page_buffers(page); +- local_irq_save(flags); +- bit_spin_lock(BH_Uptodate_Lock, &first->b_state); ++ flags = bh_uptodate_lock_irqsave(first); + + clear_buffer_async_write(bh); + unlock_buffer(bh); +@@ -371,15 +366,12 @@ void end_buffer_async_write(struct buffer_head *bh, int uptodate) + } + tmp = tmp->b_this_page; + } +- bit_spin_unlock(BH_Uptodate_Lock, &first->b_state); +- local_irq_restore(flags); ++ bh_uptodate_unlock_irqrestore(first, flags); + end_page_writeback(page); + return; + + still_busy: +- bit_spin_unlock(BH_Uptodate_Lock, &first->b_state); +- local_irq_restore(flags); +- return; ++ bh_uptodate_unlock_irqrestore(first, flags); + } + EXPORT_SYMBOL(end_buffer_async_write); + +@@ -3384,6 +3376,7 @@ struct buffer_head *alloc_buffer_head(gfp_t gfp_flags) + struct buffer_head *ret = kmem_cache_zalloc(bh_cachep, gfp_flags); + if (ret) { + INIT_LIST_HEAD(&ret->b_assoc_buffers); ++ buffer_head_init_locks(ret); + preempt_disable(); + __this_cpu_inc(bh_accounting.nr); + recalc_bh_state(); +diff --git a/fs/cifs/readdir.c b/fs/cifs/readdir.c +index 8f6a2a5863b9..4217828d0b68 100644 +--- a/fs/cifs/readdir.c ++++ b/fs/cifs/readdir.c +@@ -80,7 +80,7 @@ cifs_prime_dcache(struct dentry *parent, struct qstr *name, + struct inode *inode; + struct super_block *sb = parent->d_sb; + struct cifs_sb_info *cifs_sb = CIFS_SB(sb); +- DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq); ++ DECLARE_SWAIT_QUEUE_HEAD_ONSTACK(wq); + + cifs_dbg(FYI, "%s: for %s\n", __func__, name->name); + +diff --git a/fs/dcache.c b/fs/dcache.c +index 5c7cc953ac81..a9bb31f1c1af 100644 +--- a/fs/dcache.c ++++ b/fs/dcache.c +@@ -19,6 +19,7 @@ + #include <linux/mm.h> + #include <linux/fs.h> + #include <linux/fsnotify.h> ++#include <linux/delay.h> + #include <linux/slab.h> + #include <linux/init.h> + #include <linux/hash.h> +@@ -750,6 +751,8 @@ static inline bool fast_dput(struct dentry *dentry) + */ + void dput(struct dentry *dentry) + { ++ struct dentry *parent; ++ + if (unlikely(!dentry)) + return; + +@@ -788,9 +791,18 @@ void dput(struct dentry *dentry) + return; + + kill_it: +- dentry = dentry_kill(dentry); +- if (dentry) { +- cond_resched(); ++ parent = dentry_kill(dentry); ++ if (parent) { ++ int r; ++ ++ if (parent == dentry) { ++ /* the task with the highest priority won't schedule */ ++ r = cond_resched(); ++ if (!r) ++ cpu_chill(); ++ } else { ++ dentry = parent; ++ } + goto repeat; + } + } +@@ -2321,7 +2333,7 @@ void d_delete(struct dentry * dentry) + if (dentry->d_lockref.count == 1) { + if (!spin_trylock(&inode->i_lock)) { + spin_unlock(&dentry->d_lock); +- cpu_relax(); ++ cpu_chill(); + goto again; + } + dentry->d_flags &= ~DCACHE_CANT_MOUNT; +@@ -2381,21 +2393,24 @@ static inline void end_dir_add(struct inode *dir, unsigned n) + + static void d_wait_lookup(struct dentry *dentry) + { +- if (d_in_lookup(dentry)) { +- DECLARE_WAITQUEUE(wait, current); +- add_wait_queue(dentry->d_wait, &wait); +- do { +- set_current_state(TASK_UNINTERRUPTIBLE); +- spin_unlock(&dentry->d_lock); +- schedule(); +- spin_lock(&dentry->d_lock); +- } while (d_in_lookup(dentry)); +- } ++ struct swait_queue __wait; ++ ++ if (!d_in_lookup(dentry)) ++ return; ++ ++ INIT_LIST_HEAD(&__wait.task_list); ++ do { ++ prepare_to_swait(dentry->d_wait, &__wait, TASK_UNINTERRUPTIBLE); ++ spin_unlock(&dentry->d_lock); ++ schedule(); ++ spin_lock(&dentry->d_lock); ++ } while (d_in_lookup(dentry)); ++ finish_swait(dentry->d_wait, &__wait); + } + + struct dentry *d_alloc_parallel(struct dentry *parent, + const struct qstr *name, +- wait_queue_head_t *wq) ++ struct swait_queue_head *wq) + { + unsigned int hash = name->hash; + struct hlist_bl_head *b = in_lookup_hash(parent, hash); +@@ -2504,7 +2519,7 @@ void __d_lookup_done(struct dentry *dentry) + hlist_bl_lock(b); + dentry->d_flags &= ~DCACHE_PAR_LOOKUP; + __hlist_bl_del(&dentry->d_u.d_in_lookup_hash); +- wake_up_all(dentry->d_wait); ++ swake_up_all(dentry->d_wait); + dentry->d_wait = NULL; + hlist_bl_unlock(b); + INIT_HLIST_NODE(&dentry->d_u.d_alias); +@@ -3601,6 +3616,11 @@ EXPORT_SYMBOL(d_genocide); + + void __init vfs_caches_init_early(void) + { ++ int i; ++ ++ for (i = 0; i < ARRAY_SIZE(in_lookup_hashtable); i++) ++ INIT_HLIST_BL_HEAD(&in_lookup_hashtable[i]); ++ + dcache_init_early(); + inode_init_early(); + } +diff --git a/fs/eventpoll.c b/fs/eventpoll.c +index 10db91218933..42af0a06f657 100644 +--- a/fs/eventpoll.c ++++ b/fs/eventpoll.c +@@ -510,12 +510,12 @@ static int ep_poll_wakeup_proc(void *priv, void *cookie, int call_nests) + */ + static void ep_poll_safewake(wait_queue_head_t *wq) + { +- int this_cpu = get_cpu(); ++ int this_cpu = get_cpu_light(); + + ep_call_nested(&poll_safewake_ncalls, EP_MAX_NESTS, + ep_poll_wakeup_proc, NULL, wq, (void *) (long) this_cpu); + +- put_cpu(); ++ put_cpu_light(); + } + + static void ep_remove_wait_queue(struct eppoll_entry *pwq) +diff --git a/fs/exec.c b/fs/exec.c +index 6fcfb3f7b137..751370a71ec5 100644 +--- a/fs/exec.c ++++ b/fs/exec.c +@@ -1012,12 +1012,14 @@ static int exec_mmap(struct mm_struct *mm) + } + } + task_lock(tsk); ++ preempt_disable_rt(); + active_mm = tsk->active_mm; + tsk->mm = mm; + tsk->active_mm = mm; + activate_mm(active_mm, mm); + tsk->mm->vmacache_seqnum = 0; + vmacache_flush(tsk); ++ preempt_enable_rt(); + task_unlock(tsk); + if (old_mm) { + up_read(&old_mm->mmap_sem); +diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c +index 4ff9251e9d3a..8fe489ec2ef1 100644 +--- a/fs/fuse/dir.c ++++ b/fs/fuse/dir.c +@@ -1174,7 +1174,7 @@ static int fuse_direntplus_link(struct file *file, + struct inode *dir = d_inode(parent); + struct fuse_conn *fc; + struct inode *inode; +- DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq); ++ DECLARE_SWAIT_QUEUE_HEAD_ONSTACK(wq); + + if (!o->nodeid) { + /* +diff --git a/fs/jbd2/checkpoint.c b/fs/jbd2/checkpoint.c +index 684996c8a3a4..6e18a06aaabe 100644 +--- a/fs/jbd2/checkpoint.c ++++ b/fs/jbd2/checkpoint.c +@@ -116,6 +116,8 @@ void __jbd2_log_wait_for_space(journal_t *journal) + nblocks = jbd2_space_needed(journal); + while (jbd2_log_space_left(journal) < nblocks) { + write_unlock(&journal->j_state_lock); ++ if (current->plug) ++ io_schedule(); + mutex_lock(&journal->j_checkpoint_mutex); + + /* +diff --git a/fs/namei.c b/fs/namei.c +index adb04146df09..a89dfaf9f209 100644 +--- a/fs/namei.c ++++ b/fs/namei.c +@@ -1629,7 +1629,7 @@ static struct dentry *lookup_slow(const struct qstr *name, + { + struct dentry *dentry = ERR_PTR(-ENOENT), *old; + struct inode *inode = dir->d_inode; +- DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq); ++ DECLARE_SWAIT_QUEUE_HEAD_ONSTACK(wq); + + inode_lock_shared(inode); + /* Don't go there if it's already dead */ +@@ -3086,7 +3086,7 @@ static int lookup_open(struct nameidata *nd, struct path *path, + struct dentry *dentry; + int error, create_error = 0; + umode_t mode = op->mode; +- DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq); ++ DECLARE_SWAIT_QUEUE_HEAD_ONSTACK(wq); + + if (unlikely(IS_DEADDIR(dir_inode))) + return -ENOENT; +diff --git a/fs/namespace.c b/fs/namespace.c +index 7bb2cda3bfef..cf79b18e7b58 100644 +--- a/fs/namespace.c ++++ b/fs/namespace.c +@@ -14,6 +14,7 @@ + #include <linux/mnt_namespace.h> + #include <linux/user_namespace.h> + #include <linux/namei.h> ++#include <linux/delay.h> + #include <linux/security.h> + #include <linux/idr.h> + #include <linux/init.h> /* init_rootfs */ +@@ -353,8 +354,11 @@ int __mnt_want_write(struct vfsmount *m) + * incremented count after it has set MNT_WRITE_HOLD. + */ + smp_mb(); +- while (ACCESS_ONCE(mnt->mnt.mnt_flags) & MNT_WRITE_HOLD) +- cpu_relax(); ++ while (ACCESS_ONCE(mnt->mnt.mnt_flags) & MNT_WRITE_HOLD) { ++ preempt_enable(); ++ cpu_chill(); ++ preempt_disable(); ++ } + /* + * After the slowpath clears MNT_WRITE_HOLD, mnt_is_readonly will + * be set to match its requirements. So we must not load that until +diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c +index b9c65421ed81..03ffe8af8785 100644 +--- a/fs/nfs/delegation.c ++++ b/fs/nfs/delegation.c +@@ -150,11 +150,11 @@ static int nfs_delegation_claim_opens(struct inode *inode, + sp = state->owner; + /* Block nfs4_proc_unlck */ + mutex_lock(&sp->so_delegreturn_mutex); +- seq = raw_seqcount_begin(&sp->so_reclaim_seqcount); ++ seq = read_seqbegin(&sp->so_reclaim_seqlock); + err = nfs4_open_delegation_recall(ctx, state, stateid, type); + if (!err) + err = nfs_delegation_claim_locks(ctx, state, stateid); +- if (!err && read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) ++ if (!err && read_seqretry(&sp->so_reclaim_seqlock, seq)) + err = -EAGAIN; + mutex_unlock(&sp->so_delegreturn_mutex); + put_nfs_open_context(ctx); +diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c +index 6bc5a68e39f1..ce6488e07a13 100644 +--- a/fs/nfs/dir.c ++++ b/fs/nfs/dir.c +@@ -485,7 +485,7 @@ static + void nfs_prime_dcache(struct dentry *parent, struct nfs_entry *entry) + { + struct qstr filename = QSTR_INIT(entry->name, entry->len); +- DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq); ++ DECLARE_SWAIT_QUEUE_HEAD_ONSTACK(wq); + struct dentry *dentry; + struct dentry *alias; + struct inode *dir = d_inode(parent); +@@ -1490,7 +1490,7 @@ int nfs_atomic_open(struct inode *dir, struct dentry *dentry, + struct file *file, unsigned open_flags, + umode_t mode, int *opened) + { +- DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq); ++ DECLARE_SWAIT_QUEUE_HEAD_ONSTACK(wq); + struct nfs_open_context *ctx; + struct dentry *res; + struct iattr attr = { .ia_valid = ATTR_OPEN }; +@@ -1805,7 +1805,11 @@ int nfs_rmdir(struct inode *dir, struct dentry *dentry) + + trace_nfs_rmdir_enter(dir, dentry); + if (d_really_is_positive(dentry)) { ++#ifdef CONFIG_PREEMPT_RT_BASE ++ down(&NFS_I(d_inode(dentry))->rmdir_sem); ++#else + down_write(&NFS_I(d_inode(dentry))->rmdir_sem); ++#endif + error = NFS_PROTO(dir)->rmdir(dir, &dentry->d_name); + /* Ensure the VFS deletes this inode */ + switch (error) { +@@ -1815,7 +1819,11 @@ int nfs_rmdir(struct inode *dir, struct dentry *dentry) + case -ENOENT: + nfs_dentry_handle_enoent(dentry); + } ++#ifdef CONFIG_PREEMPT_RT_BASE ++ up(&NFS_I(d_inode(dentry))->rmdir_sem); ++#else + up_write(&NFS_I(d_inode(dentry))->rmdir_sem); ++#endif + } else + error = NFS_PROTO(dir)->rmdir(dir, &dentry->d_name); + trace_nfs_rmdir_exit(dir, dentry, error); +diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c +index bf4ec5ecc97e..36cd5fc9192c 100644 +--- a/fs/nfs/inode.c ++++ b/fs/nfs/inode.c +@@ -1957,7 +1957,11 @@ static void init_once(void *foo) + nfsi->nrequests = 0; + nfsi->commit_info.ncommit = 0; + atomic_set(&nfsi->commit_info.rpcs_out, 0); ++#ifdef CONFIG_PREEMPT_RT_BASE ++ sema_init(&nfsi->rmdir_sem, 1); ++#else + init_rwsem(&nfsi->rmdir_sem); ++#endif + nfs4_init_once(nfsi); + } + +diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h +index 9bf64eacba5b..041da5cb80f5 100644 +--- a/fs/nfs/nfs4_fs.h ++++ b/fs/nfs/nfs4_fs.h +@@ -107,7 +107,7 @@ struct nfs4_state_owner { + unsigned long so_flags; + struct list_head so_states; + struct nfs_seqid_counter so_seqid; +- seqcount_t so_reclaim_seqcount; ++ seqlock_t so_reclaim_seqlock; + struct mutex so_delegreturn_mutex; + }; + +diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c +index a9dec32ba9ba..49b64dfb307c 100644 +--- a/fs/nfs/nfs4proc.c ++++ b/fs/nfs/nfs4proc.c +@@ -2525,7 +2525,7 @@ static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata, + unsigned int seq; + int ret; + +- seq = raw_seqcount_begin(&sp->so_reclaim_seqcount); ++ seq = raw_seqcount_begin(&sp->so_reclaim_seqlock.seqcount); + + ret = _nfs4_proc_open(opendata); + if (ret != 0) +@@ -2561,7 +2561,7 @@ static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata, + ctx->state = state; + if (d_inode(dentry) == state->inode) { + nfs_inode_attach_open_context(ctx); +- if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) ++ if (read_seqretry(&sp->so_reclaim_seqlock, seq)) + nfs4_schedule_stateid_recovery(server, state); + } + out: +diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c +index 8353f33f0466..657e13ed4b5d 100644 +--- a/fs/nfs/nfs4state.c ++++ b/fs/nfs/nfs4state.c +@@ -488,7 +488,7 @@ nfs4_alloc_state_owner(struct nfs_server *server, + nfs4_init_seqid_counter(&sp->so_seqid); + atomic_set(&sp->so_count, 1); + INIT_LIST_HEAD(&sp->so_lru); +- seqcount_init(&sp->so_reclaim_seqcount); ++ seqlock_init(&sp->so_reclaim_seqlock); + mutex_init(&sp->so_delegreturn_mutex); + return sp; + } +@@ -1459,8 +1459,12 @@ static int nfs4_reclaim_open_state(struct nfs4_state_owner *sp, const struct nfs + * recovering after a network partition or a reboot from a + * server that doesn't support a grace period. + */ ++#ifdef CONFIG_PREEMPT_RT_FULL ++ write_seqlock(&sp->so_reclaim_seqlock); ++#else ++ write_seqcount_begin(&sp->so_reclaim_seqlock.seqcount); ++#endif + spin_lock(&sp->so_lock); +- raw_write_seqcount_begin(&sp->so_reclaim_seqcount); + restart: + list_for_each_entry(state, &sp->so_states, open_states) { + if (!test_and_clear_bit(ops->state_flag_bit, &state->flags)) +@@ -1528,14 +1532,20 @@ static int nfs4_reclaim_open_state(struct nfs4_state_owner *sp, const struct nfs + spin_lock(&sp->so_lock); + goto restart; + } +- raw_write_seqcount_end(&sp->so_reclaim_seqcount); + spin_unlock(&sp->so_lock); ++#ifdef CONFIG_PREEMPT_RT_FULL ++ write_sequnlock(&sp->so_reclaim_seqlock); ++#else ++ write_seqcount_end(&sp->so_reclaim_seqlock.seqcount); ++#endif + return 0; + out_err: + nfs4_put_open_state(state); +- spin_lock(&sp->so_lock); +- raw_write_seqcount_end(&sp->so_reclaim_seqcount); +- spin_unlock(&sp->so_lock); ++#ifdef CONFIG_PREEMPT_RT_FULL ++ write_sequnlock(&sp->so_reclaim_seqlock); ++#else ++ write_seqcount_end(&sp->so_reclaim_seqlock.seqcount); ++#endif + return status; + } + +diff --git a/fs/nfs/unlink.c b/fs/nfs/unlink.c +index 191aa577dd1f..58990c8f52e0 100644 +--- a/fs/nfs/unlink.c ++++ b/fs/nfs/unlink.c +@@ -12,7 +12,7 @@ + #include <linux/sunrpc/clnt.h> + #include <linux/nfs_fs.h> + #include <linux/sched.h> +-#include <linux/wait.h> ++#include <linux/swait.h> + #include <linux/namei.h> + #include <linux/fsnotify.h> + +@@ -51,6 +51,29 @@ static void nfs_async_unlink_done(struct rpc_task *task, void *calldata) + rpc_restart_call_prepare(task); + } + ++#ifdef CONFIG_PREEMPT_RT_BASE ++static void nfs_down_anon(struct semaphore *sema) ++{ ++ down(sema); ++} ++ ++static void nfs_up_anon(struct semaphore *sema) ++{ ++ up(sema); ++} ++ ++#else ++static void nfs_down_anon(struct rw_semaphore *rwsem) ++{ ++ down_read_non_owner(rwsem); ++} ++ ++static void nfs_up_anon(struct rw_semaphore *rwsem) ++{ ++ up_read_non_owner(rwsem); ++} ++#endif ++ + /** + * nfs_async_unlink_release - Release the sillydelete data. + * @task: rpc_task of the sillydelete +@@ -64,7 +87,7 @@ static void nfs_async_unlink_release(void *calldata) + struct dentry *dentry = data->dentry; + struct super_block *sb = dentry->d_sb; + +- up_read_non_owner(&NFS_I(d_inode(dentry->d_parent))->rmdir_sem); ++ nfs_up_anon(&NFS_I(d_inode(dentry->d_parent))->rmdir_sem); + d_lookup_done(dentry); + nfs_free_unlinkdata(data); + dput(dentry); +@@ -117,10 +140,10 @@ static int nfs_call_unlink(struct dentry *dentry, struct nfs_unlinkdata *data) + struct inode *dir = d_inode(dentry->d_parent); + struct dentry *alias; + +- down_read_non_owner(&NFS_I(dir)->rmdir_sem); ++ nfs_down_anon(&NFS_I(dir)->rmdir_sem); + alias = d_alloc_parallel(dentry->d_parent, &data->args.name, &data->wq); + if (IS_ERR(alias)) { +- up_read_non_owner(&NFS_I(dir)->rmdir_sem); ++ nfs_up_anon(&NFS_I(dir)->rmdir_sem); + return 0; + } + if (!d_in_lookup(alias)) { +@@ -142,7 +165,7 @@ static int nfs_call_unlink(struct dentry *dentry, struct nfs_unlinkdata *data) + ret = 0; + spin_unlock(&alias->d_lock); + dput(alias); +- up_read_non_owner(&NFS_I(dir)->rmdir_sem); ++ nfs_up_anon(&NFS_I(dir)->rmdir_sem); + /* + * If we'd displaced old cached devname, free it. At that + * point dentry is definitely not a root, so we won't need +@@ -182,7 +205,7 @@ nfs_async_unlink(struct dentry *dentry, const struct qstr *name) + goto out_free_name; + } + data->res.dir_attr = &data->dir_attr; +- init_waitqueue_head(&data->wq); ++ init_swait_queue_head(&data->wq); + + status = -EBUSY; + spin_lock(&dentry->d_lock); +diff --git a/fs/ntfs/aops.c b/fs/ntfs/aops.c +index fe251f187ff8..e89da4fb14c2 100644 +--- a/fs/ntfs/aops.c ++++ b/fs/ntfs/aops.c +@@ -92,13 +92,13 @@ static void ntfs_end_buffer_async_read(struct buffer_head *bh, int uptodate) + ofs = 0; + if (file_ofs < init_size) + ofs = init_size - file_ofs; +- local_irq_save(flags); ++ local_irq_save_nort(flags); + kaddr = kmap_atomic(page); + memset(kaddr + bh_offset(bh) + ofs, 0, + bh->b_size - ofs); + flush_dcache_page(page); + kunmap_atomic(kaddr); +- local_irq_restore(flags); ++ local_irq_restore_nort(flags); + } + } else { + clear_buffer_uptodate(bh); +@@ -107,8 +107,7 @@ static void ntfs_end_buffer_async_read(struct buffer_head *bh, int uptodate) + "0x%llx.", (unsigned long long)bh->b_blocknr); + } + first = page_buffers(page); +- local_irq_save(flags); +- bit_spin_lock(BH_Uptodate_Lock, &first->b_state); ++ flags = bh_uptodate_lock_irqsave(first); + clear_buffer_async_read(bh); + unlock_buffer(bh); + tmp = bh; +@@ -123,8 +122,7 @@ static void ntfs_end_buffer_async_read(struct buffer_head *bh, int uptodate) + } + tmp = tmp->b_this_page; + } while (tmp != bh); +- bit_spin_unlock(BH_Uptodate_Lock, &first->b_state); +- local_irq_restore(flags); ++ bh_uptodate_unlock_irqrestore(first, flags); + /* + * If none of the buffers had errors then we can set the page uptodate, + * but we first have to perform the post read mst fixups, if the +@@ -145,13 +143,13 @@ static void ntfs_end_buffer_async_read(struct buffer_head *bh, int uptodate) + recs = PAGE_SIZE / rec_size; + /* Should have been verified before we got here... */ + BUG_ON(!recs); +- local_irq_save(flags); ++ local_irq_save_nort(flags); + kaddr = kmap_atomic(page); + for (i = 0; i < recs; i++) + post_read_mst_fixup((NTFS_RECORD*)(kaddr + + i * rec_size), rec_size); + kunmap_atomic(kaddr); +- local_irq_restore(flags); ++ local_irq_restore_nort(flags); + flush_dcache_page(page); + if (likely(page_uptodate && !PageError(page))) + SetPageUptodate(page); +@@ -159,9 +157,7 @@ static void ntfs_end_buffer_async_read(struct buffer_head *bh, int uptodate) + unlock_page(page); + return; + still_busy: +- bit_spin_unlock(BH_Uptodate_Lock, &first->b_state); +- local_irq_restore(flags); +- return; ++ bh_uptodate_unlock_irqrestore(first, flags); + } + + /** +diff --git a/fs/proc/base.c b/fs/proc/base.c +index ac0df4dde823..ad1a4723ffdd 100644 +--- a/fs/proc/base.c ++++ b/fs/proc/base.c +@@ -1819,7 +1819,7 @@ bool proc_fill_cache(struct file *file, struct dir_context *ctx, + + child = d_hash_and_lookup(dir, &qname); + if (!child) { +- DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq); ++ DECLARE_SWAIT_QUEUE_HEAD_ONSTACK(wq); + child = d_alloc_parallel(dir, &qname, &wq); + if (IS_ERR(child)) + goto end_instantiate; +diff --git a/fs/proc/proc_sysctl.c b/fs/proc/proc_sysctl.c +index 1b93650dda2f..c553bf3ea541 100644 +--- a/fs/proc/proc_sysctl.c ++++ b/fs/proc/proc_sysctl.c +@@ -627,7 +627,7 @@ static bool proc_sys_fill_cache(struct file *file, + + child = d_lookup(dir, &qname); + if (!child) { +- DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq); ++ DECLARE_SWAIT_QUEUE_HEAD_ONSTACK(wq); + child = d_alloc_parallel(dir, &qname, &wq); + if (IS_ERR(child)) + return false; +diff --git a/fs/timerfd.c b/fs/timerfd.c +index 9ae4abb4110b..8644b67c48fd 100644 +--- a/fs/timerfd.c ++++ b/fs/timerfd.c +@@ -460,7 +460,10 @@ static int do_timerfd_settime(int ufd, int flags, + break; + } + spin_unlock_irq(&ctx->wqh.lock); +- cpu_relax(); ++ if (isalarm(ctx)) ++ hrtimer_wait_for_timer(&ctx->t.alarm.timer); ++ else ++ hrtimer_wait_for_timer(&ctx->t.tmr); + } + + /* +diff --git a/include/acpi/platform/aclinux.h b/include/acpi/platform/aclinux.h +index 93b61b1f2beb..58270adb46ce 100644 +--- a/include/acpi/platform/aclinux.h ++++ b/include/acpi/platform/aclinux.h +@@ -131,6 +131,7 @@ + + #define acpi_cache_t struct kmem_cache + #define acpi_spinlock spinlock_t * ++#define acpi_raw_spinlock raw_spinlock_t * + #define acpi_cpu_flags unsigned long + + /* Use native linux version of acpi_os_allocate_zeroed */ +@@ -149,6 +150,20 @@ + #define ACPI_USE_ALTERNATE_PROTOTYPE_acpi_os_get_thread_id + #define ACPI_USE_ALTERNATE_PROTOTYPE_acpi_os_create_lock + ++#define acpi_os_create_raw_lock(__handle) \ ++({ \ ++ raw_spinlock_t *lock = ACPI_ALLOCATE(sizeof(*lock)); \ ++ \ ++ if (lock) { \ ++ *(__handle) = lock; \ ++ raw_spin_lock_init(*(__handle)); \ ++ } \ ++ lock ? AE_OK : AE_NO_MEMORY; \ ++ }) ++ ++#define acpi_os_delete_raw_lock(__handle) kfree(__handle) ++ ++ + /* + * OSL interfaces used by debugger/disassembler + */ +diff --git a/include/asm-generic/bug.h b/include/asm-generic/bug.h +index 6f96247226a4..fa53a21263c2 100644 +--- a/include/asm-generic/bug.h ++++ b/include/asm-generic/bug.h +@@ -215,6 +215,20 @@ void __warn(const char *file, int line, void *caller, unsigned taint, + # define WARN_ON_SMP(x) ({0;}) + #endif + ++#ifdef CONFIG_PREEMPT_RT_BASE ++# define BUG_ON_RT(c) BUG_ON(c) ++# define BUG_ON_NONRT(c) do { } while (0) ++# define WARN_ON_RT(condition) WARN_ON(condition) ++# define WARN_ON_NONRT(condition) do { } while (0) ++# define WARN_ON_ONCE_NONRT(condition) do { } while (0) ++#else ++# define BUG_ON_RT(c) do { } while (0) ++# define BUG_ON_NONRT(c) BUG_ON(c) ++# define WARN_ON_RT(condition) do { } while (0) ++# define WARN_ON_NONRT(condition) WARN_ON(condition) ++# define WARN_ON_ONCE_NONRT(condition) WARN_ON_ONCE(condition) ++#endif ++ + #endif /* __ASSEMBLY__ */ + + #endif +diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h +index e43bbffb5b7a..c23892264109 100644 +--- a/include/linux/blk-mq.h ++++ b/include/linux/blk-mq.h +@@ -222,6 +222,7 @@ static inline u16 blk_mq_unique_tag_to_tag(u32 unique_tag) + + struct blk_mq_hw_ctx *blk_mq_map_queue(struct request_queue *, const int ctx_index); + struct blk_mq_hw_ctx *blk_mq_alloc_single_hw_queue(struct blk_mq_tag_set *, unsigned int, int); ++void __blk_mq_complete_request_remote_work(struct work_struct *work); + + int blk_mq_request_started(struct request *rq); + void blk_mq_start_request(struct request *rq); +diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h +index e79055c8b577..8583c1af14ad 100644 +--- a/include/linux/blkdev.h ++++ b/include/linux/blkdev.h +@@ -89,6 +89,7 @@ struct request { + struct list_head queuelist; + union { + struct call_single_data csd; ++ struct work_struct work; + u64 fifo_time; + }; + +@@ -467,7 +468,7 @@ struct request_queue { + struct throtl_data *td; + #endif + struct rcu_head rcu_head; +- wait_queue_head_t mq_freeze_wq; ++ struct swait_queue_head mq_freeze_wq; + struct percpu_ref q_usage_counter; + struct list_head all_q_node; + +diff --git a/include/linux/bottom_half.h b/include/linux/bottom_half.h +index 8fdcb783197d..d07dbeec7bc1 100644 +--- a/include/linux/bottom_half.h ++++ b/include/linux/bottom_half.h +@@ -3,6 +3,39 @@ + + #include <linux/preempt.h> + ++#ifdef CONFIG_PREEMPT_RT_FULL ++ ++extern void __local_bh_disable(void); ++extern void _local_bh_enable(void); ++extern void __local_bh_enable(void); ++ ++static inline void local_bh_disable(void) ++{ ++ __local_bh_disable(); ++} ++ ++static inline void __local_bh_disable_ip(unsigned long ip, unsigned int cnt) ++{ ++ __local_bh_disable(); ++} ++ ++static inline void local_bh_enable(void) ++{ ++ __local_bh_enable(); ++} ++ ++static inline void __local_bh_enable_ip(unsigned long ip, unsigned int cnt) ++{ ++ __local_bh_enable(); ++} ++ ++static inline void local_bh_enable_ip(unsigned long ip) ++{ ++ __local_bh_enable(); ++} ++ ++#else ++ + #ifdef CONFIG_TRACE_IRQFLAGS + extern void __local_bh_disable_ip(unsigned long ip, unsigned int cnt); + #else +@@ -30,5 +63,6 @@ static inline void local_bh_enable(void) + { + __local_bh_enable_ip(_THIS_IP_, SOFTIRQ_DISABLE_OFFSET); + } ++#endif + + #endif /* _LINUX_BH_H */ +diff --git a/include/linux/buffer_head.h b/include/linux/buffer_head.h +index ebbacd14d450..be5e87f6360a 100644 +--- a/include/linux/buffer_head.h ++++ b/include/linux/buffer_head.h +@@ -75,8 +75,50 @@ struct buffer_head { + struct address_space *b_assoc_map; /* mapping this buffer is + associated with */ + atomic_t b_count; /* users using this buffer_head */ ++#ifdef CONFIG_PREEMPT_RT_BASE ++ spinlock_t b_uptodate_lock; ++#if IS_ENABLED(CONFIG_JBD2) ++ spinlock_t b_state_lock; ++ spinlock_t b_journal_head_lock; ++#endif ++#endif + }; + ++static inline unsigned long bh_uptodate_lock_irqsave(struct buffer_head *bh) ++{ ++ unsigned long flags; ++ ++#ifndef CONFIG_PREEMPT_RT_BASE ++ local_irq_save(flags); ++ bit_spin_lock(BH_Uptodate_Lock, &bh->b_state); ++#else ++ spin_lock_irqsave(&bh->b_uptodate_lock, flags); ++#endif ++ return flags; ++} ++ ++static inline void ++bh_uptodate_unlock_irqrestore(struct buffer_head *bh, unsigned long flags) ++{ ++#ifndef CONFIG_PREEMPT_RT_BASE ++ bit_spin_unlock(BH_Uptodate_Lock, &bh->b_state); ++ local_irq_restore(flags); ++#else ++ spin_unlock_irqrestore(&bh->b_uptodate_lock, flags); ++#endif ++} ++ ++static inline void buffer_head_init_locks(struct buffer_head *bh) ++{ ++#ifdef CONFIG_PREEMPT_RT_BASE ++ spin_lock_init(&bh->b_uptodate_lock); ++#if IS_ENABLED(CONFIG_JBD2) ++ spin_lock_init(&bh->b_state_lock); ++ spin_lock_init(&bh->b_journal_head_lock); ++#endif ++#endif ++} ++ + /* + * macro tricks to expand the set_buffer_foo(), clear_buffer_foo() + * and buffer_foo() functions. +diff --git a/include/linux/cgroup-defs.h b/include/linux/cgroup-defs.h +index 5b17de62c962..56027cc01a56 100644 +--- a/include/linux/cgroup-defs.h ++++ b/include/linux/cgroup-defs.h +@@ -16,6 +16,7 @@ + #include <linux/percpu-refcount.h> + #include <linux/percpu-rwsem.h> + #include <linux/workqueue.h> ++#include <linux/swork.h> + + #ifdef CONFIG_CGROUPS + +@@ -137,6 +138,7 @@ struct cgroup_subsys_state { + /* percpu_ref killing and RCU release */ + struct rcu_head rcu_head; + struct work_struct destroy_work; ++ struct swork_event destroy_swork; + }; + + /* +diff --git a/include/linux/completion.h b/include/linux/completion.h +index 5d5aaae3af43..3bca1590e29f 100644 +--- a/include/linux/completion.h ++++ b/include/linux/completion.h +@@ -7,8 +7,7 @@ + * Atomic wait-for-completion handler data structures. + * See kernel/sched/completion.c for details. + */ +- +-#include <linux/wait.h> ++#include <linux/swait.h> + + /* + * struct completion - structure used to maintain state for a "completion" +@@ -24,11 +23,11 @@ + */ + struct completion { + unsigned int done; +- wait_queue_head_t wait; ++ struct swait_queue_head wait; + }; + + #define COMPLETION_INITIALIZER(work) \ +- { 0, __WAIT_QUEUE_HEAD_INITIALIZER((work).wait) } ++ { 0, __SWAIT_QUEUE_HEAD_INITIALIZER((work).wait) } + + #define COMPLETION_INITIALIZER_ONSTACK(work) \ + ({ init_completion(&work); work; }) +@@ -73,7 +72,7 @@ struct completion { + static inline void init_completion(struct completion *x) + { + x->done = 0; +- init_waitqueue_head(&x->wait); ++ init_swait_queue_head(&x->wait); + } + + /** +diff --git a/include/linux/cpu.h b/include/linux/cpu.h +index 797d9c8e9a1b..6eabd9e8a98b 100644 +--- a/include/linux/cpu.h ++++ b/include/linux/cpu.h +@@ -201,6 +201,8 @@ extern void get_online_cpus(void); + extern void put_online_cpus(void); + extern void cpu_hotplug_disable(void); + extern void cpu_hotplug_enable(void); ++extern void pin_current_cpu(void); ++extern void unpin_current_cpu(void); + #define hotcpu_notifier(fn, pri) cpu_notifier(fn, pri) + #define __hotcpu_notifier(fn, pri) __cpu_notifier(fn, pri) + #define register_hotcpu_notifier(nb) register_cpu_notifier(nb) +@@ -218,6 +220,8 @@ static inline void cpu_hotplug_done(void) {} + #define put_online_cpus() do { } while (0) + #define cpu_hotplug_disable() do { } while (0) + #define cpu_hotplug_enable() do { } while (0) ++static inline void pin_current_cpu(void) { } ++static inline void unpin_current_cpu(void) { } + #define hotcpu_notifier(fn, pri) do { (void)(fn); } while (0) + #define __hotcpu_notifier(fn, pri) do { (void)(fn); } while (0) + /* These aren't inline functions due to a GCC bug. */ +diff --git a/include/linux/dcache.h b/include/linux/dcache.h +index 5ff3e9a4fe5f..ed0431599fd7 100644 +--- a/include/linux/dcache.h ++++ b/include/linux/dcache.h +@@ -11,6 +11,7 @@ + #include <linux/rcupdate.h> + #include <linux/lockref.h> + #include <linux/stringhash.h> ++#include <linux/wait.h> + + struct path; + struct vfsmount; +@@ -100,7 +101,7 @@ struct dentry { + + union { + struct list_head d_lru; /* LRU list */ +- wait_queue_head_t *d_wait; /* in-lookup ones only */ ++ struct swait_queue_head *d_wait; /* in-lookup ones only */ + }; + struct list_head d_child; /* child of parent list */ + struct list_head d_subdirs; /* our children */ +@@ -230,7 +231,7 @@ extern void d_set_d_op(struct dentry *dentry, const struct dentry_operations *op + extern struct dentry * d_alloc(struct dentry *, const struct qstr *); + extern struct dentry * d_alloc_pseudo(struct super_block *, const struct qstr *); + extern struct dentry * d_alloc_parallel(struct dentry *, const struct qstr *, +- wait_queue_head_t *); ++ struct swait_queue_head *); + extern struct dentry * d_splice_alias(struct inode *, struct dentry *); + extern struct dentry * d_add_ci(struct dentry *, struct inode *, struct qstr *); + extern struct dentry * d_exact_alias(struct dentry *, struct inode *); +diff --git a/include/linux/delay.h b/include/linux/delay.h +index a6ecb34cf547..37caab306336 100644 +--- a/include/linux/delay.h ++++ b/include/linux/delay.h +@@ -52,4 +52,10 @@ static inline void ssleep(unsigned int seconds) + msleep(seconds * 1000); + } + ++#ifdef CONFIG_PREEMPT_RT_FULL ++extern void cpu_chill(void); ++#else ++# define cpu_chill() cpu_relax() ++#endif ++ + #endif /* defined(_LINUX_DELAY_H) */ +diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h +index 7d565afe35d2..8e31b4d245d2 100644 +--- a/include/linux/ftrace.h ++++ b/include/linux/ftrace.h +@@ -714,6 +714,7 @@ static inline void __ftrace_enabled_restore(int enabled) + #define CALLER_ADDR5 ((unsigned long)ftrace_return_address(5)) + #define CALLER_ADDR6 ((unsigned long)ftrace_return_address(6)) + ++#ifdef CONFIG_USING_GET_LOCK_PARENT_IP + static inline unsigned long get_lock_parent_ip(void) + { + unsigned long addr = CALLER_ADDR0; +@@ -725,6 +726,7 @@ static inline unsigned long get_lock_parent_ip(void) + return addr; + return CALLER_ADDR2; + } ++#endif + + #ifdef CONFIG_IRQSOFF_TRACER + extern void time_hardirqs_on(unsigned long a0, unsigned long a1); +diff --git a/include/linux/highmem.h b/include/linux/highmem.h +index bb3f3297062a..a117a33ef72c 100644 +--- a/include/linux/highmem.h ++++ b/include/linux/highmem.h +@@ -7,6 +7,7 @@ + #include <linux/mm.h> + #include <linux/uaccess.h> + #include <linux/hardirq.h> ++#include <linux/sched.h> + + #include <asm/cacheflush.h> + +@@ -65,7 +66,7 @@ static inline void kunmap(struct page *page) + + static inline void *kmap_atomic(struct page *page) + { +- preempt_disable(); ++ preempt_disable_nort(); + pagefault_disable(); + return page_address(page); + } +@@ -74,7 +75,7 @@ static inline void *kmap_atomic(struct page *page) + static inline void __kunmap_atomic(void *addr) + { + pagefault_enable(); +- preempt_enable(); ++ preempt_enable_nort(); + } + + #define kmap_atomic_pfn(pfn) kmap_atomic(pfn_to_page(pfn)) +@@ -86,32 +87,51 @@ static inline void __kunmap_atomic(void *addr) + + #if defined(CONFIG_HIGHMEM) || defined(CONFIG_X86_32) + ++#ifndef CONFIG_PREEMPT_RT_FULL + DECLARE_PER_CPU(int, __kmap_atomic_idx); ++#endif + + static inline int kmap_atomic_idx_push(void) + { ++#ifndef CONFIG_PREEMPT_RT_FULL + int idx = __this_cpu_inc_return(__kmap_atomic_idx) - 1; + +-#ifdef CONFIG_DEBUG_HIGHMEM ++# ifdef CONFIG_DEBUG_HIGHMEM + WARN_ON_ONCE(in_irq() && !irqs_disabled()); + BUG_ON(idx >= KM_TYPE_NR); +-#endif ++# endif + return idx; ++#else ++ current->kmap_idx++; ++ BUG_ON(current->kmap_idx > KM_TYPE_NR); ++ return current->kmap_idx - 1; ++#endif + } + + static inline int kmap_atomic_idx(void) + { ++#ifndef CONFIG_PREEMPT_RT_FULL + return __this_cpu_read(__kmap_atomic_idx) - 1; ++#else ++ return current->kmap_idx - 1; ++#endif + } + + static inline void kmap_atomic_idx_pop(void) + { +-#ifdef CONFIG_DEBUG_HIGHMEM ++#ifndef CONFIG_PREEMPT_RT_FULL ++# ifdef CONFIG_DEBUG_HIGHMEM + int idx = __this_cpu_dec_return(__kmap_atomic_idx); + + BUG_ON(idx < 0); +-#else ++# else + __this_cpu_dec(__kmap_atomic_idx); ++# endif ++#else ++ current->kmap_idx--; ++# ifdef CONFIG_DEBUG_HIGHMEM ++ BUG_ON(current->kmap_idx < 0); ++# endif + #endif + } + +diff --git a/include/linux/hrtimer.h b/include/linux/hrtimer.h +index 5e00f80b1535..65d0671f20b4 100644 +--- a/include/linux/hrtimer.h ++++ b/include/linux/hrtimer.h +@@ -87,6 +87,9 @@ enum hrtimer_restart { + * @function: timer expiry callback function + * @base: pointer to the timer base (per cpu and per clock) + * @state: state information (See bit values above) ++ * @cb_entry: list entry to defer timers from hardirq context ++ * @irqsafe: timer can run in hardirq context ++ * @praecox: timer expiry time if expired at the time of programming + * @is_rel: Set if the timer was armed relative + * @start_pid: timer statistics field to store the pid of the task which + * started the timer +@@ -103,6 +106,11 @@ struct hrtimer { + enum hrtimer_restart (*function)(struct hrtimer *); + struct hrtimer_clock_base *base; + u8 state; ++ struct list_head cb_entry; ++ int irqsafe; ++#ifdef CONFIG_MISSED_TIMER_OFFSETS_HIST ++ ktime_t praecox; ++#endif + u8 is_rel; + #ifdef CONFIG_TIMER_STATS + int start_pid; +@@ -123,11 +131,7 @@ struct hrtimer_sleeper { + struct task_struct *task; + }; + +-#ifdef CONFIG_64BIT + # define HRTIMER_CLOCK_BASE_ALIGN 64 +-#else +-# define HRTIMER_CLOCK_BASE_ALIGN 32 +-#endif + + /** + * struct hrtimer_clock_base - the timer base for a specific clock +@@ -136,6 +140,7 @@ struct hrtimer_sleeper { + * timer to a base on another cpu. + * @clockid: clock id for per_cpu support + * @active: red black tree root node for the active timers ++ * @expired: list head for deferred timers. + * @get_time: function to retrieve the current time of the clock + * @offset: offset of this clock to the monotonic base + */ +@@ -144,6 +149,7 @@ struct hrtimer_clock_base { + int index; + clockid_t clockid; + struct timerqueue_head active; ++ struct list_head expired; + ktime_t (*get_time)(void); + ktime_t offset; + } __attribute__((__aligned__(HRTIMER_CLOCK_BASE_ALIGN))); +@@ -187,6 +193,7 @@ struct hrtimer_cpu_base { + raw_spinlock_t lock; + seqcount_t seq; + struct hrtimer *running; ++ struct hrtimer *running_soft; + unsigned int cpu; + unsigned int active_bases; + unsigned int clock_was_set_seq; +@@ -203,6 +210,9 @@ struct hrtimer_cpu_base { + unsigned int nr_hangs; + unsigned int max_hang_time; + #endif ++#ifdef CONFIG_PREEMPT_RT_BASE ++ wait_queue_head_t wait; ++#endif + struct hrtimer_clock_base clock_base[HRTIMER_MAX_CLOCK_BASES]; + } ____cacheline_aligned; + +@@ -412,6 +422,13 @@ static inline void hrtimer_restart(struct hrtimer *timer) + hrtimer_start_expires(timer, HRTIMER_MODE_ABS); + } + ++/* Softirq preemption could deadlock timer removal */ ++#ifdef CONFIG_PREEMPT_RT_BASE ++ extern void hrtimer_wait_for_timer(const struct hrtimer *timer); ++#else ++# define hrtimer_wait_for_timer(timer) do { cpu_relax(); } while (0) ++#endif ++ + /* Query timers: */ + extern ktime_t __hrtimer_get_remaining(const struct hrtimer *timer, bool adjust); + +@@ -436,7 +453,7 @@ static inline int hrtimer_is_queued(struct hrtimer *timer) + * Helper function to check, whether the timer is running the callback + * function + */ +-static inline int hrtimer_callback_running(struct hrtimer *timer) ++static inline int hrtimer_callback_running(const struct hrtimer *timer) + { + return timer->base->cpu_base->running == timer; + } +diff --git a/include/linux/idr.h b/include/linux/idr.h +index 083d61e92706..5899796f50cb 100644 +--- a/include/linux/idr.h ++++ b/include/linux/idr.h +@@ -95,10 +95,14 @@ bool idr_is_empty(struct idr *idp); + * Each idr_preload() should be matched with an invocation of this + * function. See idr_preload() for details. + */ ++#ifdef CONFIG_PREEMPT_RT_FULL ++void idr_preload_end(void); ++#else + static inline void idr_preload_end(void) + { + preempt_enable(); + } ++#endif + + /** + * idr_find - return pointer for given id +diff --git a/include/linux/init_task.h b/include/linux/init_task.h +index f8834f820ec2..a688d5e19578 100644 +--- a/include/linux/init_task.h ++++ b/include/linux/init_task.h +@@ -148,6 +148,12 @@ extern struct task_group root_task_group; + # define INIT_PERF_EVENTS(tsk) + #endif + ++#ifdef CONFIG_PREEMPT_RT_BASE ++# define INIT_TIMER_LIST .posix_timer_list = NULL, ++#else ++# define INIT_TIMER_LIST ++#endif ++ + #ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN + # define INIT_VTIME(tsk) \ + .vtime_seqcount = SEQCNT_ZERO(tsk.vtime_seqcount), \ +@@ -239,6 +245,7 @@ extern struct task_group root_task_group; + .cpu_timers = INIT_CPU_TIMERS(tsk.cpu_timers), \ + .pi_lock = __RAW_SPIN_LOCK_UNLOCKED(tsk.pi_lock), \ + .timer_slack_ns = 50000, /* 50 usec default slack */ \ ++ INIT_TIMER_LIST \ + .pids = { \ + [PIDTYPE_PID] = INIT_PID_LINK(PIDTYPE_PID), \ + [PIDTYPE_PGID] = INIT_PID_LINK(PIDTYPE_PGID), \ +diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h +index b6683f0ffc9f..c0a351daf736 100644 +--- a/include/linux/interrupt.h ++++ b/include/linux/interrupt.h +@@ -14,6 +14,7 @@ + #include <linux/hrtimer.h> + #include <linux/kref.h> + #include <linux/workqueue.h> ++#include <linux/swork.h> + + #include <linux/atomic.h> + #include <asm/ptrace.h> +@@ -61,6 +62,7 @@ + * interrupt handler after suspending interrupts. For system + * wakeup devices users need to implement wakeup detection in + * their interrupt handlers. ++ * IRQF_NO_SOFTIRQ_CALL - Do not process softirqs in the irq thread context (RT) + */ + #define IRQF_SHARED 0x00000080 + #define IRQF_PROBE_SHARED 0x00000100 +@@ -74,6 +76,7 @@ + #define IRQF_NO_THREAD 0x00010000 + #define IRQF_EARLY_RESUME 0x00020000 + #define IRQF_COND_SUSPEND 0x00040000 ++#define IRQF_NO_SOFTIRQ_CALL 0x00080000 + + #define IRQF_TIMER (__IRQF_TIMER | IRQF_NO_SUSPEND | IRQF_NO_THREAD) + +@@ -196,7 +199,7 @@ extern void devm_free_irq(struct device *dev, unsigned int irq, void *dev_id); + #ifdef CONFIG_LOCKDEP + # define local_irq_enable_in_hardirq() do { } while (0) + #else +-# define local_irq_enable_in_hardirq() local_irq_enable() ++# define local_irq_enable_in_hardirq() local_irq_enable_nort() + #endif + + extern void disable_irq_nosync(unsigned int irq); +@@ -216,6 +219,7 @@ extern void resume_device_irqs(void); + * struct irq_affinity_notify - context for notification of IRQ affinity changes + * @irq: Interrupt to which notification applies + * @kref: Reference count, for internal use ++ * @swork: Swork item, for internal use + * @work: Work item, for internal use + * @notify: Function to be called on change. This will be + * called in process context. +@@ -227,7 +231,11 @@ extern void resume_device_irqs(void); + struct irq_affinity_notify { + unsigned int irq; + struct kref kref; ++#ifdef CONFIG_PREEMPT_RT_BASE ++ struct swork_event swork; ++#else + struct work_struct work; ++#endif + void (*notify)(struct irq_affinity_notify *, const cpumask_t *mask); + void (*release)(struct kref *ref); + }; +@@ -398,9 +406,13 @@ extern int irq_set_irqchip_state(unsigned int irq, enum irqchip_irq_state which, + bool state); + + #ifdef CONFIG_IRQ_FORCED_THREADING ++# ifndef CONFIG_PREEMPT_RT_BASE + extern bool force_irqthreads; ++# else ++# define force_irqthreads (true) ++# endif + #else +-#define force_irqthreads (0) ++#define force_irqthreads (false) + #endif + + #ifndef __ARCH_SET_SOFTIRQ_PENDING +@@ -457,9 +469,10 @@ struct softirq_action + void (*action)(struct softirq_action *); + }; + ++#ifndef CONFIG_PREEMPT_RT_FULL + asmlinkage void do_softirq(void); + asmlinkage void __do_softirq(void); +- ++static inline void thread_do_softirq(void) { do_softirq(); } + #ifdef __ARCH_HAS_DO_SOFTIRQ + void do_softirq_own_stack(void); + #else +@@ -468,13 +481,25 @@ static inline void do_softirq_own_stack(void) + __do_softirq(); + } + #endif ++#else ++extern void thread_do_softirq(void); ++#endif + + extern void open_softirq(int nr, void (*action)(struct softirq_action *)); + extern void softirq_init(void); + extern void __raise_softirq_irqoff(unsigned int nr); ++#ifdef CONFIG_PREEMPT_RT_FULL ++extern void __raise_softirq_irqoff_ksoft(unsigned int nr); ++#else ++static inline void __raise_softirq_irqoff_ksoft(unsigned int nr) ++{ ++ __raise_softirq_irqoff(nr); ++} ++#endif + + extern void raise_softirq_irqoff(unsigned int nr); + extern void raise_softirq(unsigned int nr); ++extern void softirq_check_pending_idle(void); + + DECLARE_PER_CPU(struct task_struct *, ksoftirqd); + +@@ -496,8 +521,9 @@ static inline struct task_struct *this_cpu_ksoftirqd(void) + to be executed on some cpu at least once after this. + * If the tasklet is already scheduled, but its execution is still not + started, it will be executed only once. +- * If this tasklet is already running on another CPU (or schedule is called +- from tasklet itself), it is rescheduled for later. ++ * If this tasklet is already running on another CPU, it is rescheduled ++ for later. ++ * Schedule must not be called from the tasklet itself (a lockup occurs) + * Tasklet is strictly serialized wrt itself, but not + wrt another tasklets. If client needs some intertask synchronization, + he makes it with spinlocks. +@@ -522,27 +548,36 @@ struct tasklet_struct name = { NULL, 0, ATOMIC_INIT(1), func, data } + enum + { + TASKLET_STATE_SCHED, /* Tasklet is scheduled for execution */ +- TASKLET_STATE_RUN /* Tasklet is running (SMP only) */ ++ TASKLET_STATE_RUN, /* Tasklet is running (SMP only) */ ++ TASKLET_STATE_PENDING /* Tasklet is pending */ + }; + +-#ifdef CONFIG_SMP ++#define TASKLET_STATEF_SCHED (1 << TASKLET_STATE_SCHED) ++#define TASKLET_STATEF_RUN (1 << TASKLET_STATE_RUN) ++#define TASKLET_STATEF_PENDING (1 << TASKLET_STATE_PENDING) ++ ++#if defined(CONFIG_SMP) || defined(CONFIG_PREEMPT_RT_FULL) + static inline int tasklet_trylock(struct tasklet_struct *t) + { + return !test_and_set_bit(TASKLET_STATE_RUN, &(t)->state); + } + ++static inline int tasklet_tryunlock(struct tasklet_struct *t) ++{ ++ return cmpxchg(&t->state, TASKLET_STATEF_RUN, 0) == TASKLET_STATEF_RUN; ++} ++ + static inline void tasklet_unlock(struct tasklet_struct *t) + { + smp_mb__before_atomic(); + clear_bit(TASKLET_STATE_RUN, &(t)->state); + } + +-static inline void tasklet_unlock_wait(struct tasklet_struct *t) +-{ +- while (test_bit(TASKLET_STATE_RUN, &(t)->state)) { barrier(); } +-} ++extern void tasklet_unlock_wait(struct tasklet_struct *t); ++ + #else + #define tasklet_trylock(t) 1 ++#define tasklet_tryunlock(t) 1 + #define tasklet_unlock_wait(t) do { } while (0) + #define tasklet_unlock(t) do { } while (0) + #endif +@@ -591,12 +626,7 @@ static inline void tasklet_disable(struct tasklet_struct *t) + smp_mb(); + } + +-static inline void tasklet_enable(struct tasklet_struct *t) +-{ +- smp_mb__before_atomic(); +- atomic_dec(&t->count); +-} +- ++extern void tasklet_enable(struct tasklet_struct *t); + extern void tasklet_kill(struct tasklet_struct *t); + extern void tasklet_kill_immediate(struct tasklet_struct *t, unsigned int cpu); + extern void tasklet_init(struct tasklet_struct *t, +@@ -627,6 +657,12 @@ void tasklet_hrtimer_cancel(struct tasklet_hrtimer *ttimer) + tasklet_kill(&ttimer->tasklet); + } + ++#ifdef CONFIG_PREEMPT_RT_FULL ++extern void softirq_early_init(void); ++#else ++static inline void softirq_early_init(void) { } ++#endif ++ + /* + * Autoprobing for irqs: + * +diff --git a/include/linux/irq.h b/include/linux/irq.h +index 0ac26c892fe2..ede85f106aef 100644 +--- a/include/linux/irq.h ++++ b/include/linux/irq.h +@@ -72,6 +72,7 @@ enum irqchip_irq_state; + * IRQ_IS_POLLED - Always polled by another interrupt. Exclude + * it from the spurious interrupt detection + * mechanism and from core side polling. ++ * IRQ_NO_SOFTIRQ_CALL - No softirq processing in the irq thread context (RT) + * IRQ_DISABLE_UNLAZY - Disable lazy irq disable + */ + enum { +@@ -99,13 +100,14 @@ enum { + IRQ_PER_CPU_DEVID = (1 << 17), + IRQ_IS_POLLED = (1 << 18), + IRQ_DISABLE_UNLAZY = (1 << 19), ++ IRQ_NO_SOFTIRQ_CALL = (1 << 20), + }; + + #define IRQF_MODIFY_MASK \ + (IRQ_TYPE_SENSE_MASK | IRQ_NOPROBE | IRQ_NOREQUEST | \ + IRQ_NOAUTOEN | IRQ_MOVE_PCNTXT | IRQ_LEVEL | IRQ_NO_BALANCING | \ + IRQ_PER_CPU | IRQ_NESTED_THREAD | IRQ_NOTHREAD | IRQ_PER_CPU_DEVID | \ +- IRQ_IS_POLLED | IRQ_DISABLE_UNLAZY) ++ IRQ_IS_POLLED | IRQ_DISABLE_UNLAZY | IRQ_NO_SOFTIRQ_CALL) + + #define IRQ_NO_BALANCING_MASK (IRQ_PER_CPU | IRQ_NO_BALANCING) + +diff --git a/include/linux/irq_work.h b/include/linux/irq_work.h +index 47b9ebd4a74f..2543aab05daa 100644 +--- a/include/linux/irq_work.h ++++ b/include/linux/irq_work.h +@@ -16,6 +16,7 @@ + #define IRQ_WORK_BUSY 2UL + #define IRQ_WORK_FLAGS 3UL + #define IRQ_WORK_LAZY 4UL /* Doesn't want IPI, wait for tick */ ++#define IRQ_WORK_HARD_IRQ 8UL /* Run hard IRQ context, even on RT */ + + struct irq_work { + unsigned long flags; +@@ -51,4 +52,10 @@ static inline bool irq_work_needs_cpu(void) { return false; } + static inline void irq_work_run(void) { } + #endif + ++#if defined(CONFIG_IRQ_WORK) && defined(CONFIG_PREEMPT_RT_FULL) ++void irq_work_tick_soft(void); ++#else ++static inline void irq_work_tick_soft(void) { } ++#endif ++ + #endif /* _LINUX_IRQ_WORK_H */ +diff --git a/include/linux/irqdesc.h b/include/linux/irqdesc.h +index b51beebf9804..219d9824f762 100644 +--- a/include/linux/irqdesc.h ++++ b/include/linux/irqdesc.h +@@ -64,6 +64,7 @@ struct irq_desc { + unsigned int irqs_unhandled; + atomic_t threads_handled; + int threads_handled_last; ++ u64 random_ip; + raw_spinlock_t lock; + struct cpumask *percpu_enabled; + const struct cpumask *percpu_affinity; +diff --git a/include/linux/irqflags.h b/include/linux/irqflags.h +index 5dd1272d1ab2..9b77034f7c5e 100644 +--- a/include/linux/irqflags.h ++++ b/include/linux/irqflags.h +@@ -25,8 +25,6 @@ + # define trace_softirqs_enabled(p) ((p)->softirqs_enabled) + # define trace_hardirq_enter() do { current->hardirq_context++; } while (0) + # define trace_hardirq_exit() do { current->hardirq_context--; } while (0) +-# define lockdep_softirq_enter() do { current->softirq_context++; } while (0) +-# define lockdep_softirq_exit() do { current->softirq_context--; } while (0) + # define INIT_TRACE_IRQFLAGS .softirqs_enabled = 1, + #else + # define trace_hardirqs_on() do { } while (0) +@@ -39,9 +37,15 @@ + # define trace_softirqs_enabled(p) 0 + # define trace_hardirq_enter() do { } while (0) + # define trace_hardirq_exit() do { } while (0) ++# define INIT_TRACE_IRQFLAGS ++#endif ++ ++#if defined(CONFIG_TRACE_IRQFLAGS) && !defined(CONFIG_PREEMPT_RT_FULL) ++# define lockdep_softirq_enter() do { current->softirq_context++; } while (0) ++# define lockdep_softirq_exit() do { current->softirq_context--; } while (0) ++#else + # define lockdep_softirq_enter() do { } while (0) + # define lockdep_softirq_exit() do { } while (0) +-# define INIT_TRACE_IRQFLAGS + #endif + + #if defined(CONFIG_IRQSOFF_TRACER) || \ +@@ -148,4 +152,23 @@ + + #define irqs_disabled_flags(flags) raw_irqs_disabled_flags(flags) + ++/* ++ * local_irq* variants depending on RT/!RT ++ */ ++#ifdef CONFIG_PREEMPT_RT_FULL ++# define local_irq_disable_nort() do { } while (0) ++# define local_irq_enable_nort() do { } while (0) ++# define local_irq_save_nort(flags) local_save_flags(flags) ++# define local_irq_restore_nort(flags) (void)(flags) ++# define local_irq_disable_rt() local_irq_disable() ++# define local_irq_enable_rt() local_irq_enable() ++#else ++# define local_irq_disable_nort() local_irq_disable() ++# define local_irq_enable_nort() local_irq_enable() ++# define local_irq_save_nort(flags) local_irq_save(flags) ++# define local_irq_restore_nort(flags) local_irq_restore(flags) ++# define local_irq_disable_rt() do { } while (0) ++# define local_irq_enable_rt() do { } while (0) ++#endif ++ + #endif +diff --git a/include/linux/jbd2.h b/include/linux/jbd2.h +index dfaa1f4dcb0c..d57dd06544a1 100644 +--- a/include/linux/jbd2.h ++++ b/include/linux/jbd2.h +@@ -347,32 +347,56 @@ static inline struct journal_head *bh2jh(struct buffer_head *bh) + + static inline void jbd_lock_bh_state(struct buffer_head *bh) + { ++#ifndef CONFIG_PREEMPT_RT_BASE + bit_spin_lock(BH_State, &bh->b_state); ++#else ++ spin_lock(&bh->b_state_lock); ++#endif + } + + static inline int jbd_trylock_bh_state(struct buffer_head *bh) + { ++#ifndef CONFIG_PREEMPT_RT_BASE + return bit_spin_trylock(BH_State, &bh->b_state); ++#else ++ return spin_trylock(&bh->b_state_lock); ++#endif + } + + static inline int jbd_is_locked_bh_state(struct buffer_head *bh) + { ++#ifndef CONFIG_PREEMPT_RT_BASE + return bit_spin_is_locked(BH_State, &bh->b_state); ++#else ++ return spin_is_locked(&bh->b_state_lock); ++#endif + } + + static inline void jbd_unlock_bh_state(struct buffer_head *bh) + { ++#ifndef CONFIG_PREEMPT_RT_BASE + bit_spin_unlock(BH_State, &bh->b_state); ++#else ++ spin_unlock(&bh->b_state_lock); ++#endif + } + + static inline void jbd_lock_bh_journal_head(struct buffer_head *bh) + { ++#ifndef CONFIG_PREEMPT_RT_BASE + bit_spin_lock(BH_JournalHead, &bh->b_state); ++#else ++ spin_lock(&bh->b_journal_head_lock); ++#endif + } + + static inline void jbd_unlock_bh_journal_head(struct buffer_head *bh) + { ++#ifndef CONFIG_PREEMPT_RT_BASE + bit_spin_unlock(BH_JournalHead, &bh->b_state); ++#else ++ spin_unlock(&bh->b_journal_head_lock); ++#endif + } + + #define J_ASSERT(assert) BUG_ON(!(assert)) +diff --git a/include/linux/kdb.h b/include/linux/kdb.h +index 410decacff8f..0861bebfc188 100644 +--- a/include/linux/kdb.h ++++ b/include/linux/kdb.h +@@ -167,6 +167,7 @@ extern __printf(2, 0) int vkdb_printf(enum kdb_msgsrc src, const char *fmt, + extern __printf(1, 2) int kdb_printf(const char *, ...); + typedef __printf(1, 2) int (*kdb_printf_t)(const char *, ...); + ++#define in_kdb_printk() (kdb_trap_printk) + extern void kdb_init(int level); + + /* Access to kdb specific polling devices */ +@@ -201,6 +202,7 @@ extern int kdb_register_flags(char *, kdb_func_t, char *, char *, + extern int kdb_unregister(char *); + #else /* ! CONFIG_KGDB_KDB */ + static inline __printf(1, 2) int kdb_printf(const char *fmt, ...) { return 0; } ++#define in_kdb_printk() (0) + static inline void kdb_init(int level) {} + static inline int kdb_register(char *cmd, kdb_func_t func, char *usage, + char *help, short minlen) { return 0; } +diff --git a/include/linux/kernel.h b/include/linux/kernel.h +index d96a6118d26a..37de2ce2d290 100644 +--- a/include/linux/kernel.h ++++ b/include/linux/kernel.h +@@ -194,6 +194,9 @@ extern int _cond_resched(void); + */ + # define might_sleep() \ + do { __might_sleep(__FILE__, __LINE__, 0); might_resched(); } while (0) ++ ++# define might_sleep_no_state_check() \ ++ do { ___might_sleep(__FILE__, __LINE__, 0); might_resched(); } while (0) + # define sched_annotate_sleep() (current->task_state_change = 0) + #else + static inline void ___might_sleep(const char *file, int line, +@@ -201,6 +204,7 @@ extern int _cond_resched(void); + static inline void __might_sleep(const char *file, int line, + int preempt_offset) { } + # define might_sleep() do { might_resched(); } while (0) ++# define might_sleep_no_state_check() do { might_resched(); } while (0) + # define sched_annotate_sleep() do { } while (0) + #endif + +@@ -491,6 +495,7 @@ extern enum system_states { + SYSTEM_HALT, + SYSTEM_POWER_OFF, + SYSTEM_RESTART, ++ SYSTEM_SUSPEND, + } system_state; + + #define TAINT_PROPRIETARY_MODULE 0 +diff --git a/include/linux/lglock.h b/include/linux/lglock.h +index c92ebd100d9b..6f035f635d0e 100644 +--- a/include/linux/lglock.h ++++ b/include/linux/lglock.h +@@ -34,13 +34,30 @@ + #endif + + struct lglock { ++#ifdef CONFIG_PREEMPT_RT_FULL ++ struct rt_mutex __percpu *lock; ++#else + arch_spinlock_t __percpu *lock; ++#endif + #ifdef CONFIG_DEBUG_LOCK_ALLOC + struct lock_class_key lock_key; + struct lockdep_map lock_dep_map; + #endif + }; + ++#ifdef CONFIG_PREEMPT_RT_FULL ++# define DEFINE_LGLOCK(name) \ ++ static DEFINE_PER_CPU(struct rt_mutex, name ## _lock) \ ++ = __RT_MUTEX_INITIALIZER( name ## _lock); \ ++ struct lglock name = { .lock = &name ## _lock } ++ ++# define DEFINE_STATIC_LGLOCK(name) \ ++ static DEFINE_PER_CPU(struct rt_mutex, name ## _lock) \ ++ = __RT_MUTEX_INITIALIZER( name ## _lock); \ ++ static struct lglock name = { .lock = &name ## _lock } ++ ++#else ++ + #define DEFINE_LGLOCK(name) \ + static DEFINE_PER_CPU(arch_spinlock_t, name ## _lock) \ + = __ARCH_SPIN_LOCK_UNLOCKED; \ +@@ -50,6 +67,7 @@ struct lglock { + static DEFINE_PER_CPU(arch_spinlock_t, name ## _lock) \ + = __ARCH_SPIN_LOCK_UNLOCKED; \ + static struct lglock name = { .lock = &name ## _lock } ++#endif + + void lg_lock_init(struct lglock *lg, char *name); + +@@ -64,6 +82,12 @@ void lg_double_unlock(struct lglock *lg, int cpu1, int cpu2); + void lg_global_lock(struct lglock *lg); + void lg_global_unlock(struct lglock *lg); + ++#ifndef CONFIG_PREEMPT_RT_FULL ++#define lg_global_trylock_relax(name) lg_global_lock(name) ++#else ++void lg_global_trylock_relax(struct lglock *lg); ++#endif ++ + #else + /* When !CONFIG_SMP, map lglock to spinlock */ + #define lglock spinlock +diff --git a/include/linux/list_bl.h b/include/linux/list_bl.h +index cb483305e1f5..4e5062316bb6 100644 +--- a/include/linux/list_bl.h ++++ b/include/linux/list_bl.h +@@ -2,6 +2,7 @@ + #define _LINUX_LIST_BL_H + + #include <linux/list.h> ++#include <linux/spinlock.h> + #include <linux/bit_spinlock.h> + + /* +@@ -32,13 +33,24 @@ + + struct hlist_bl_head { + struct hlist_bl_node *first; ++#ifdef CONFIG_PREEMPT_RT_BASE ++ raw_spinlock_t lock; ++#endif + }; + + struct hlist_bl_node { + struct hlist_bl_node *next, **pprev; + }; +-#define INIT_HLIST_BL_HEAD(ptr) \ +- ((ptr)->first = NULL) ++ ++#ifdef CONFIG_PREEMPT_RT_BASE ++#define INIT_HLIST_BL_HEAD(h) \ ++do { \ ++ (h)->first = NULL; \ ++ raw_spin_lock_init(&(h)->lock); \ ++} while (0) ++#else ++#define INIT_HLIST_BL_HEAD(h) (h)->first = NULL ++#endif + + static inline void INIT_HLIST_BL_NODE(struct hlist_bl_node *h) + { +@@ -118,12 +130,26 @@ static inline void hlist_bl_del_init(struct hlist_bl_node *n) + + static inline void hlist_bl_lock(struct hlist_bl_head *b) + { ++#ifndef CONFIG_PREEMPT_RT_BASE + bit_spin_lock(0, (unsigned long *)b); ++#else ++ raw_spin_lock(&b->lock); ++#if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_SPINLOCK) ++ __set_bit(0, (unsigned long *)b); ++#endif ++#endif + } + + static inline void hlist_bl_unlock(struct hlist_bl_head *b) + { ++#ifndef CONFIG_PREEMPT_RT_BASE + __bit_spin_unlock(0, (unsigned long *)b); ++#else ++#if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_SPINLOCK) ++ __clear_bit(0, (unsigned long *)b); ++#endif ++ raw_spin_unlock(&b->lock); ++#endif + } + + static inline bool hlist_bl_is_locked(struct hlist_bl_head *b) +diff --git a/include/linux/locallock.h b/include/linux/locallock.h +new file mode 100644 +index 000000000000..845c77f1a5ca +--- /dev/null ++++ b/include/linux/locallock.h +@@ -0,0 +1,278 @@ ++#ifndef _LINUX_LOCALLOCK_H ++#define _LINUX_LOCALLOCK_H ++ ++#include <linux/percpu.h> ++#include <linux/spinlock.h> ++ ++#ifdef CONFIG_PREEMPT_RT_BASE ++ ++#ifdef CONFIG_DEBUG_SPINLOCK ++# define LL_WARN(cond) WARN_ON(cond) ++#else ++# define LL_WARN(cond) do { } while (0) ++#endif ++ ++/* ++ * per cpu lock based substitute for local_irq_*() ++ */ ++struct local_irq_lock { ++ spinlock_t lock; ++ struct task_struct *owner; ++ int nestcnt; ++ unsigned long flags; ++}; ++ ++#define DEFINE_LOCAL_IRQ_LOCK(lvar) \ ++ DEFINE_PER_CPU(struct local_irq_lock, lvar) = { \ ++ .lock = __SPIN_LOCK_UNLOCKED((lvar).lock) } ++ ++#define DECLARE_LOCAL_IRQ_LOCK(lvar) \ ++ DECLARE_PER_CPU(struct local_irq_lock, lvar) ++ ++#define local_irq_lock_init(lvar) \ ++ do { \ ++ int __cpu; \ ++ for_each_possible_cpu(__cpu) \ ++ spin_lock_init(&per_cpu(lvar, __cpu).lock); \ ++ } while (0) ++ ++/* ++ * spin_lock|trylock|unlock_local flavour that does not migrate disable ++ * used for __local_lock|trylock|unlock where get_local_var/put_local_var ++ * already takes care of the migrate_disable/enable ++ * for CONFIG_PREEMPT_BASE map to the normal spin_* calls. ++ */ ++#ifdef CONFIG_PREEMPT_RT_FULL ++# define spin_lock_local(lock) rt_spin_lock__no_mg(lock) ++# define spin_trylock_local(lock) rt_spin_trylock__no_mg(lock) ++# define spin_unlock_local(lock) rt_spin_unlock__no_mg(lock) ++#else ++# define spin_lock_local(lock) spin_lock(lock) ++# define spin_trylock_local(lock) spin_trylock(lock) ++# define spin_unlock_local(lock) spin_unlock(lock) ++#endif ++ ++static inline void __local_lock(struct local_irq_lock *lv) ++{ ++ if (lv->owner != current) { ++ spin_lock_local(&lv->lock); ++ LL_WARN(lv->owner); ++ LL_WARN(lv->nestcnt); ++ lv->owner = current; ++ } ++ lv->nestcnt++; ++} ++ ++#define local_lock(lvar) \ ++ do { __local_lock(&get_local_var(lvar)); } while (0) ++ ++#define local_lock_on(lvar, cpu) \ ++ do { __local_lock(&per_cpu(lvar, cpu)); } while (0) ++ ++static inline int __local_trylock(struct local_irq_lock *lv) ++{ ++ if (lv->owner != current && spin_trylock_local(&lv->lock)) { ++ LL_WARN(lv->owner); ++ LL_WARN(lv->nestcnt); ++ lv->owner = current; ++ lv->nestcnt = 1; ++ return 1; ++ } ++ return 0; ++} ++ ++#define local_trylock(lvar) \ ++ ({ \ ++ int __locked; \ ++ __locked = __local_trylock(&get_local_var(lvar)); \ ++ if (!__locked) \ ++ put_local_var(lvar); \ ++ __locked; \ ++ }) ++ ++static inline void __local_unlock(struct local_irq_lock *lv) ++{ ++ LL_WARN(lv->nestcnt == 0); ++ LL_WARN(lv->owner != current); ++ if (--lv->nestcnt) ++ return; ++ ++ lv->owner = NULL; ++ spin_unlock_local(&lv->lock); ++} ++ ++#define local_unlock(lvar) \ ++ do { \ ++ __local_unlock(this_cpu_ptr(&lvar)); \ ++ put_local_var(lvar); \ ++ } while (0) ++ ++#define local_unlock_on(lvar, cpu) \ ++ do { __local_unlock(&per_cpu(lvar, cpu)); } while (0) ++ ++static inline void __local_lock_irq(struct local_irq_lock *lv) ++{ ++ spin_lock_irqsave(&lv->lock, lv->flags); ++ LL_WARN(lv->owner); ++ LL_WARN(lv->nestcnt); ++ lv->owner = current; ++ lv->nestcnt = 1; ++} ++ ++#define local_lock_irq(lvar) \ ++ do { __local_lock_irq(&get_local_var(lvar)); } while (0) ++ ++#define local_lock_irq_on(lvar, cpu) \ ++ do { __local_lock_irq(&per_cpu(lvar, cpu)); } while (0) ++ ++static inline void __local_unlock_irq(struct local_irq_lock *lv) ++{ ++ LL_WARN(!lv->nestcnt); ++ LL_WARN(lv->owner != current); ++ lv->owner = NULL; ++ lv->nestcnt = 0; ++ spin_unlock_irq(&lv->lock); ++} ++ ++#define local_unlock_irq(lvar) \ ++ do { \ ++ __local_unlock_irq(this_cpu_ptr(&lvar)); \ ++ put_local_var(lvar); \ ++ } while (0) ++ ++#define local_unlock_irq_on(lvar, cpu) \ ++ do { \ ++ __local_unlock_irq(&per_cpu(lvar, cpu)); \ ++ } while (0) ++ ++static inline int __local_lock_irqsave(struct local_irq_lock *lv) ++{ ++ if (lv->owner != current) { ++ __local_lock_irq(lv); ++ return 0; ++ } else { ++ lv->nestcnt++; ++ return 1; ++ } ++} ++ ++#define local_lock_irqsave(lvar, _flags) \ ++ do { \ ++ if (__local_lock_irqsave(&get_local_var(lvar))) \ ++ put_local_var(lvar); \ ++ _flags = __this_cpu_read(lvar.flags); \ ++ } while (0) ++ ++#define local_lock_irqsave_on(lvar, _flags, cpu) \ ++ do { \ ++ __local_lock_irqsave(&per_cpu(lvar, cpu)); \ ++ _flags = per_cpu(lvar, cpu).flags; \ ++ } while (0) ++ ++static inline int __local_unlock_irqrestore(struct local_irq_lock *lv, ++ unsigned long flags) ++{ ++ LL_WARN(!lv->nestcnt); ++ LL_WARN(lv->owner != current); ++ if (--lv->nestcnt) ++ return 0; ++ ++ lv->owner = NULL; ++ spin_unlock_irqrestore(&lv->lock, lv->flags); ++ return 1; ++} ++ ++#define local_unlock_irqrestore(lvar, flags) \ ++ do { \ ++ if (__local_unlock_irqrestore(this_cpu_ptr(&lvar), flags)) \ ++ put_local_var(lvar); \ ++ } while (0) ++ ++#define local_unlock_irqrestore_on(lvar, flags, cpu) \ ++ do { \ ++ __local_unlock_irqrestore(&per_cpu(lvar, cpu), flags); \ ++ } while (0) ++ ++#define local_spin_trylock_irq(lvar, lock) \ ++ ({ \ ++ int __locked; \ ++ local_lock_irq(lvar); \ ++ __locked = spin_trylock(lock); \ ++ if (!__locked) \ ++ local_unlock_irq(lvar); \ ++ __locked; \ ++ }) ++ ++#define local_spin_lock_irq(lvar, lock) \ ++ do { \ ++ local_lock_irq(lvar); \ ++ spin_lock(lock); \ ++ } while (0) ++ ++#define local_spin_unlock_irq(lvar, lock) \ ++ do { \ ++ spin_unlock(lock); \ ++ local_unlock_irq(lvar); \ ++ } while (0) ++ ++#define local_spin_lock_irqsave(lvar, lock, flags) \ ++ do { \ ++ local_lock_irqsave(lvar, flags); \ ++ spin_lock(lock); \ ++ } while (0) ++ ++#define local_spin_unlock_irqrestore(lvar, lock, flags) \ ++ do { \ ++ spin_unlock(lock); \ ++ local_unlock_irqrestore(lvar, flags); \ ++ } while (0) ++ ++#define get_locked_var(lvar, var) \ ++ (*({ \ ++ local_lock(lvar); \ ++ this_cpu_ptr(&var); \ ++ })) ++ ++#define put_locked_var(lvar, var) local_unlock(lvar); ++ ++#define local_lock_cpu(lvar) \ ++ ({ \ ++ local_lock(lvar); \ ++ smp_processor_id(); \ ++ }) ++ ++#define local_unlock_cpu(lvar) local_unlock(lvar) ++ ++#else /* PREEMPT_RT_BASE */ ++ ++#define DEFINE_LOCAL_IRQ_LOCK(lvar) __typeof__(const int) lvar ++#define DECLARE_LOCAL_IRQ_LOCK(lvar) extern __typeof__(const int) lvar ++ ++static inline void local_irq_lock_init(int lvar) { } ++ ++#define local_lock(lvar) preempt_disable() ++#define local_unlock(lvar) preempt_enable() ++#define local_lock_irq(lvar) local_irq_disable() ++#define local_lock_irq_on(lvar, cpu) local_irq_disable() ++#define local_unlock_irq(lvar) local_irq_enable() ++#define local_unlock_irq_on(lvar, cpu) local_irq_enable() ++#define local_lock_irqsave(lvar, flags) local_irq_save(flags) ++#define local_unlock_irqrestore(lvar, flags) local_irq_restore(flags) ++ ++#define local_spin_trylock_irq(lvar, lock) spin_trylock_irq(lock) ++#define local_spin_lock_irq(lvar, lock) spin_lock_irq(lock) ++#define local_spin_unlock_irq(lvar, lock) spin_unlock_irq(lock) ++#define local_spin_lock_irqsave(lvar, lock, flags) \ ++ spin_lock_irqsave(lock, flags) ++#define local_spin_unlock_irqrestore(lvar, lock, flags) \ ++ spin_unlock_irqrestore(lock, flags) ++ ++#define get_locked_var(lvar, var) get_cpu_var(var) ++#define put_locked_var(lvar, var) put_cpu_var(var) ++ ++#define local_lock_cpu(lvar) get_cpu() ++#define local_unlock_cpu(lvar) put_cpu() ++ ++#endif ++ ++#endif +diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h +index 903200f4ec41..df670d441fc9 100644 +--- a/include/linux/mm_types.h ++++ b/include/linux/mm_types.h +@@ -11,6 +11,7 @@ + #include <linux/completion.h> + #include <linux/cpumask.h> + #include <linux/uprobes.h> ++#include <linux/rcupdate.h> + #include <linux/page-flags-layout.h> + #include <linux/workqueue.h> + #include <asm/page.h> +@@ -508,6 +509,9 @@ struct mm_struct { + bool tlb_flush_pending; + #endif + struct uprobes_state uprobes_state; ++#ifdef CONFIG_PREEMPT_RT_BASE ++ struct rcu_head delayed_drop; ++#endif + #ifdef CONFIG_X86_INTEL_MPX + /* address of the bounds directory */ + void __user *bd_addr; +diff --git a/include/linux/mutex.h b/include/linux/mutex.h +index 2cb7531e7d7a..b3fdfc820216 100644 +--- a/include/linux/mutex.h ++++ b/include/linux/mutex.h +@@ -19,6 +19,17 @@ + #include <asm/processor.h> + #include <linux/osq_lock.h> + ++#ifdef CONFIG_DEBUG_LOCK_ALLOC ++# define __DEP_MAP_MUTEX_INITIALIZER(lockname) \ ++ , .dep_map = { .name = #lockname } ++#else ++# define __DEP_MAP_MUTEX_INITIALIZER(lockname) ++#endif ++ ++#ifdef CONFIG_PREEMPT_RT_FULL ++# include <linux/mutex_rt.h> ++#else ++ + /* + * Simple, straightforward mutexes with strict semantics: + * +@@ -99,13 +110,6 @@ do { \ + static inline void mutex_destroy(struct mutex *lock) {} + #endif + +-#ifdef CONFIG_DEBUG_LOCK_ALLOC +-# define __DEP_MAP_MUTEX_INITIALIZER(lockname) \ +- , .dep_map = { .name = #lockname } +-#else +-# define __DEP_MAP_MUTEX_INITIALIZER(lockname) +-#endif +- + #define __MUTEX_INITIALIZER(lockname) \ + { .count = ATOMIC_INIT(1) \ + , .wait_lock = __SPIN_LOCK_UNLOCKED(lockname.wait_lock) \ +@@ -173,6 +177,8 @@ extern int __must_check mutex_lock_killable(struct mutex *lock); + extern int mutex_trylock(struct mutex *lock); + extern void mutex_unlock(struct mutex *lock); + ++#endif /* !PREEMPT_RT_FULL */ ++ + extern int atomic_dec_and_mutex_lock(atomic_t *cnt, struct mutex *lock); + + #endif /* __LINUX_MUTEX_H */ +diff --git a/include/linux/mutex_rt.h b/include/linux/mutex_rt.h +new file mode 100644 +index 000000000000..c38a44b14da5 +--- /dev/null ++++ b/include/linux/mutex_rt.h +@@ -0,0 +1,84 @@ ++#ifndef __LINUX_MUTEX_RT_H ++#define __LINUX_MUTEX_RT_H ++ ++#ifndef __LINUX_MUTEX_H ++#error "Please include mutex.h" ++#endif ++ ++#include <linux/rtmutex.h> ++ ++/* FIXME: Just for __lockfunc */ ++#include <linux/spinlock.h> ++ ++struct mutex { ++ struct rt_mutex lock; ++#ifdef CONFIG_DEBUG_LOCK_ALLOC ++ struct lockdep_map dep_map; ++#endif ++}; ++ ++#define __MUTEX_INITIALIZER(mutexname) \ ++ { \ ++ .lock = __RT_MUTEX_INITIALIZER(mutexname.lock) \ ++ __DEP_MAP_MUTEX_INITIALIZER(mutexname) \ ++ } ++ ++#define DEFINE_MUTEX(mutexname) \ ++ struct mutex mutexname = __MUTEX_INITIALIZER(mutexname) ++ ++extern void __mutex_do_init(struct mutex *lock, const char *name, struct lock_class_key *key); ++extern void __lockfunc _mutex_lock(struct mutex *lock); ++extern int __lockfunc _mutex_lock_interruptible(struct mutex *lock); ++extern int __lockfunc _mutex_lock_killable(struct mutex *lock); ++extern void __lockfunc _mutex_lock_nested(struct mutex *lock, int subclass); ++extern void __lockfunc _mutex_lock_nest_lock(struct mutex *lock, struct lockdep_map *nest_lock); ++extern int __lockfunc _mutex_lock_interruptible_nested(struct mutex *lock, int subclass); ++extern int __lockfunc _mutex_lock_killable_nested(struct mutex *lock, int subclass); ++extern int __lockfunc _mutex_trylock(struct mutex *lock); ++extern void __lockfunc _mutex_unlock(struct mutex *lock); ++ ++#define mutex_is_locked(l) rt_mutex_is_locked(&(l)->lock) ++#define mutex_lock(l) _mutex_lock(l) ++#define mutex_lock_interruptible(l) _mutex_lock_interruptible(l) ++#define mutex_lock_killable(l) _mutex_lock_killable(l) ++#define mutex_trylock(l) _mutex_trylock(l) ++#define mutex_unlock(l) _mutex_unlock(l) ++#define mutex_destroy(l) rt_mutex_destroy(&(l)->lock) ++ ++#ifdef CONFIG_DEBUG_LOCK_ALLOC ++# define mutex_lock_nested(l, s) _mutex_lock_nested(l, s) ++# define mutex_lock_interruptible_nested(l, s) \ ++ _mutex_lock_interruptible_nested(l, s) ++# define mutex_lock_killable_nested(l, s) \ ++ _mutex_lock_killable_nested(l, s) ++ ++# define mutex_lock_nest_lock(lock, nest_lock) \ ++do { \ ++ typecheck(struct lockdep_map *, &(nest_lock)->dep_map); \ ++ _mutex_lock_nest_lock(lock, &(nest_lock)->dep_map); \ ++} while (0) ++ ++#else ++# define mutex_lock_nested(l, s) _mutex_lock(l) ++# define mutex_lock_interruptible_nested(l, s) \ ++ _mutex_lock_interruptible(l) ++# define mutex_lock_killable_nested(l, s) \ ++ _mutex_lock_killable(l) ++# define mutex_lock_nest_lock(lock, nest_lock) mutex_lock(lock) ++#endif ++ ++# define mutex_init(mutex) \ ++do { \ ++ static struct lock_class_key __key; \ ++ \ ++ rt_mutex_init(&(mutex)->lock); \ ++ __mutex_do_init((mutex), #mutex, &__key); \ ++} while (0) ++ ++# define __mutex_init(mutex, name, key) \ ++do { \ ++ rt_mutex_init(&(mutex)->lock); \ ++ __mutex_do_init((mutex), name, key); \ ++} while (0) ++ ++#endif +diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h +index e8d79d4ebcfe..2ae8fa187016 100644 +--- a/include/linux/netdevice.h ++++ b/include/linux/netdevice.h +@@ -2409,14 +2409,53 @@ void netdev_freemem(struct net_device *dev); + void synchronize_net(void); + int init_dummy_netdev(struct net_device *dev); + +-DECLARE_PER_CPU(int, xmit_recursion); + #define XMIT_RECURSION_LIMIT 10 ++#ifdef CONFIG_PREEMPT_RT_FULL ++static inline int dev_recursion_level(void) ++{ ++ return current->xmit_recursion; ++} ++ ++static inline int xmit_rec_read(void) ++{ ++ return current->xmit_recursion; ++} ++ ++static inline void xmit_rec_inc(void) ++{ ++ current->xmit_recursion++; ++} ++ ++static inline void xmit_rec_dec(void) ++{ ++ current->xmit_recursion--; ++} ++ ++#else ++ ++DECLARE_PER_CPU(int, xmit_recursion); + + static inline int dev_recursion_level(void) + { + return this_cpu_read(xmit_recursion); + } + ++static inline int xmit_rec_read(void) ++{ ++ return __this_cpu_read(xmit_recursion); ++} ++ ++static inline void xmit_rec_inc(void) ++{ ++ __this_cpu_inc(xmit_recursion); ++} ++ ++static inline void xmit_rec_dec(void) ++{ ++ __this_cpu_dec(xmit_recursion); ++} ++#endif ++ + struct net_device *dev_get_by_index(struct net *net, int ifindex); + struct net_device *__dev_get_by_index(struct net *net, int ifindex); + struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex); +@@ -2794,6 +2833,7 @@ struct softnet_data { + unsigned int dropped; + struct sk_buff_head input_pkt_queue; + struct napi_struct backlog; ++ struct sk_buff_head tofree_queue; + + }; + +diff --git a/include/linux/netfilter/x_tables.h b/include/linux/netfilter/x_tables.h +index 2ad1a2b289b5..b4d10155af54 100644 +--- a/include/linux/netfilter/x_tables.h ++++ b/include/linux/netfilter/x_tables.h +@@ -4,6 +4,7 @@ + + #include <linux/netdevice.h> + #include <linux/static_key.h> ++#include <linux/locallock.h> + #include <uapi/linux/netfilter/x_tables.h> + + /* Test a struct->invflags and a boolean for inequality */ +@@ -300,6 +301,8 @@ void xt_free_table_info(struct xt_table_info *info); + */ + DECLARE_PER_CPU(seqcount_t, xt_recseq); + ++DECLARE_LOCAL_IRQ_LOCK(xt_write_lock); ++ + /* xt_tee_enabled - true if x_tables needs to handle reentrancy + * + * Enabled if current ip(6)tables ruleset has at least one -j TEE rule. +@@ -320,6 +323,9 @@ static inline unsigned int xt_write_recseq_begin(void) + { + unsigned int addend; + ++ /* RT protection */ ++ local_lock(xt_write_lock); ++ + /* + * Low order bit of sequence is set if we already + * called xt_write_recseq_begin(). +@@ -350,6 +356,7 @@ static inline void xt_write_recseq_end(unsigned int addend) + /* this is kind of a write_seqcount_end(), but addend is 0 or 1 */ + smp_wmb(); + __this_cpu_add(xt_recseq.sequence, addend); ++ local_unlock(xt_write_lock); + } + + /* +diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h +index 810124b33327..d54ca43d571f 100644 +--- a/include/linux/nfs_fs.h ++++ b/include/linux/nfs_fs.h +@@ -165,7 +165,11 @@ struct nfs_inode { + + /* Readers: in-flight sillydelete RPC calls */ + /* Writers: rmdir */ ++#ifdef CONFIG_PREEMPT_RT_BASE ++ struct semaphore rmdir_sem; ++#else + struct rw_semaphore rmdir_sem; ++#endif + + #if IS_ENABLED(CONFIG_NFS_V4) + struct nfs4_cached_acl *nfs4_acl; +diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h +index 7cc0deee5bde..a20f49ee69ee 100644 +--- a/include/linux/nfs_xdr.h ++++ b/include/linux/nfs_xdr.h +@@ -1484,7 +1484,7 @@ struct nfs_unlinkdata { + struct nfs_removeargs args; + struct nfs_removeres res; + struct dentry *dentry; +- wait_queue_head_t wq; ++ struct swait_queue_head wq; + struct rpc_cred *cred; + struct nfs_fattr dir_attr; + long timeout; +diff --git a/include/linux/notifier.h b/include/linux/notifier.h +index 4149868de4e6..babe5b9bcb91 100644 +--- a/include/linux/notifier.h ++++ b/include/linux/notifier.h +@@ -6,7 +6,7 @@ + * + * Alan Cox <Alan.Cox@linux.org> + */ +- ++ + #ifndef _LINUX_NOTIFIER_H + #define _LINUX_NOTIFIER_H + #include <linux/errno.h> +@@ -42,9 +42,7 @@ + * in srcu_notifier_call_chain(): no cache bounces and no memory barriers. + * As compensation, srcu_notifier_chain_unregister() is rather expensive. + * SRCU notifier chains should be used when the chain will be called very +- * often but notifier_blocks will seldom be removed. Also, SRCU notifier +- * chains are slightly more difficult to use because they require special +- * runtime initialization. ++ * often but notifier_blocks will seldom be removed. + */ + + struct notifier_block; +@@ -90,7 +88,7 @@ struct srcu_notifier_head { + (name)->head = NULL; \ + } while (0) + +-/* srcu_notifier_heads must be initialized and cleaned up dynamically */ ++/* srcu_notifier_heads must be cleaned up dynamically */ + extern void srcu_init_notifier_head(struct srcu_notifier_head *nh); + #define srcu_cleanup_notifier_head(name) \ + cleanup_srcu_struct(&(name)->srcu); +@@ -103,7 +101,13 @@ extern void srcu_init_notifier_head(struct srcu_notifier_head *nh); + .head = NULL } + #define RAW_NOTIFIER_INIT(name) { \ + .head = NULL } +-/* srcu_notifier_heads cannot be initialized statically */ ++ ++#define SRCU_NOTIFIER_INIT(name, pcpu) \ ++ { \ ++ .mutex = __MUTEX_INITIALIZER(name.mutex), \ ++ .head = NULL, \ ++ .srcu = __SRCU_STRUCT_INIT(name.srcu, pcpu), \ ++ } + + #define ATOMIC_NOTIFIER_HEAD(name) \ + struct atomic_notifier_head name = \ +@@ -115,6 +119,18 @@ extern void srcu_init_notifier_head(struct srcu_notifier_head *nh); + struct raw_notifier_head name = \ + RAW_NOTIFIER_INIT(name) + ++#define _SRCU_NOTIFIER_HEAD(name, mod) \ ++ static DEFINE_PER_CPU(struct srcu_struct_array, \ ++ name##_head_srcu_array); \ ++ mod struct srcu_notifier_head name = \ ++ SRCU_NOTIFIER_INIT(name, name##_head_srcu_array) ++ ++#define SRCU_NOTIFIER_HEAD(name) \ ++ _SRCU_NOTIFIER_HEAD(name, ) ++ ++#define SRCU_NOTIFIER_HEAD_STATIC(name) \ ++ _SRCU_NOTIFIER_HEAD(name, static) ++ + #ifdef __KERNEL__ + + extern int atomic_notifier_chain_register(struct atomic_notifier_head *nh, +@@ -184,12 +200,12 @@ static inline int notifier_to_errno(int ret) + + /* + * Declared notifiers so far. I can imagine quite a few more chains +- * over time (eg laptop power reset chains, reboot chain (to clean ++ * over time (eg laptop power reset chains, reboot chain (to clean + * device units up), device [un]mount chain, module load/unload chain, +- * low memory chain, screenblank chain (for plug in modular screenblankers) ++ * low memory chain, screenblank chain (for plug in modular screenblankers) + * VC switch chains (for loadable kernel svgalib VC switch helpers) etc... + */ +- ++ + /* CPU notfiers are defined in include/linux/cpu.h. */ + + /* netdevice notifiers are defined in include/linux/netdevice.h */ +diff --git a/include/linux/percpu.h b/include/linux/percpu.h +index 56939d3f6e53..1c7e33fc83e4 100644 +--- a/include/linux/percpu.h ++++ b/include/linux/percpu.h +@@ -18,6 +18,35 @@ + #define PERCPU_MODULE_RESERVE 0 + #endif + ++#ifdef CONFIG_PREEMPT_RT_FULL ++ ++#define get_local_var(var) (*({ \ ++ migrate_disable(); \ ++ this_cpu_ptr(&var); })) ++ ++#define put_local_var(var) do { \ ++ (void)&(var); \ ++ migrate_enable(); \ ++} while (0) ++ ++# define get_local_ptr(var) ({ \ ++ migrate_disable(); \ ++ this_cpu_ptr(var); }) ++ ++# define put_local_ptr(var) do { \ ++ (void)(var); \ ++ migrate_enable(); \ ++} while (0) ++ ++#else ++ ++#define get_local_var(var) get_cpu_var(var) ++#define put_local_var(var) put_cpu_var(var) ++#define get_local_ptr(var) get_cpu_ptr(var) ++#define put_local_ptr(var) put_cpu_ptr(var) ++ ++#endif ++ + /* minimum unit size, also is the maximum supported allocation size */ + #define PCPU_MIN_UNIT_SIZE PFN_ALIGN(32 << 10) + +diff --git a/include/linux/pid.h b/include/linux/pid.h +index 23705a53abba..2cc64b779f03 100644 +--- a/include/linux/pid.h ++++ b/include/linux/pid.h +@@ -2,6 +2,7 @@ + #define _LINUX_PID_H + + #include <linux/rcupdate.h> ++#include <linux/atomic.h> + + enum pid_type + { +diff --git a/include/linux/preempt.h b/include/linux/preempt.h +index 75e4e30677f1..1cfb1cb72354 100644 +--- a/include/linux/preempt.h ++++ b/include/linux/preempt.h +@@ -50,7 +50,11 @@ + #define HARDIRQ_OFFSET (1UL << HARDIRQ_SHIFT) + #define NMI_OFFSET (1UL << NMI_SHIFT) + +-#define SOFTIRQ_DISABLE_OFFSET (2 * SOFTIRQ_OFFSET) ++#ifndef CONFIG_PREEMPT_RT_FULL ++# define SOFTIRQ_DISABLE_OFFSET (2 * SOFTIRQ_OFFSET) ++#else ++# define SOFTIRQ_DISABLE_OFFSET (0) ++#endif + + /* We use the MSB mostly because its available */ + #define PREEMPT_NEED_RESCHED 0x80000000 +@@ -59,9 +63,15 @@ + #include <asm/preempt.h> + + #define hardirq_count() (preempt_count() & HARDIRQ_MASK) +-#define softirq_count() (preempt_count() & SOFTIRQ_MASK) + #define irq_count() (preempt_count() & (HARDIRQ_MASK | SOFTIRQ_MASK \ + | NMI_MASK)) ++#ifndef CONFIG_PREEMPT_RT_FULL ++# define softirq_count() (preempt_count() & SOFTIRQ_MASK) ++# define in_serving_softirq() (softirq_count() & SOFTIRQ_OFFSET) ++#else ++# define softirq_count() (0UL) ++extern int in_serving_softirq(void); ++#endif + + /* + * Are we doing bottom half or hardware interrupt processing? +@@ -72,7 +82,6 @@ + #define in_irq() (hardirq_count()) + #define in_softirq() (softirq_count()) + #define in_interrupt() (irq_count()) +-#define in_serving_softirq() (softirq_count() & SOFTIRQ_OFFSET) + + /* + * Are we in NMI context? +@@ -91,7 +100,11 @@ + /* + * The preempt_count offset after spin_lock() + */ ++#if !defined(CONFIG_PREEMPT_RT_FULL) + #define PREEMPT_LOCK_OFFSET PREEMPT_DISABLE_OFFSET ++#else ++#define PREEMPT_LOCK_OFFSET 0 ++#endif + + /* + * The preempt_count offset needed for things like: +@@ -140,6 +153,20 @@ extern void preempt_count_sub(int val); + #define preempt_count_inc() preempt_count_add(1) + #define preempt_count_dec() preempt_count_sub(1) + ++#ifdef CONFIG_PREEMPT_LAZY ++#define add_preempt_lazy_count(val) do { preempt_lazy_count() += (val); } while (0) ++#define sub_preempt_lazy_count(val) do { preempt_lazy_count() -= (val); } while (0) ++#define inc_preempt_lazy_count() add_preempt_lazy_count(1) ++#define dec_preempt_lazy_count() sub_preempt_lazy_count(1) ++#define preempt_lazy_count() (current_thread_info()->preempt_lazy_count) ++#else ++#define add_preempt_lazy_count(val) do { } while (0) ++#define sub_preempt_lazy_count(val) do { } while (0) ++#define inc_preempt_lazy_count() do { } while (0) ++#define dec_preempt_lazy_count() do { } while (0) ++#define preempt_lazy_count() (0) ++#endif ++ + #ifdef CONFIG_PREEMPT_COUNT + + #define preempt_disable() \ +@@ -148,13 +175,25 @@ do { \ + barrier(); \ + } while (0) + ++#define preempt_lazy_disable() \ ++do { \ ++ inc_preempt_lazy_count(); \ ++ barrier(); \ ++} while (0) ++ + #define sched_preempt_enable_no_resched() \ + do { \ + barrier(); \ + preempt_count_dec(); \ + } while (0) + +-#define preempt_enable_no_resched() sched_preempt_enable_no_resched() ++#ifdef CONFIG_PREEMPT_RT_BASE ++# define preempt_enable_no_resched() sched_preempt_enable_no_resched() ++# define preempt_check_resched_rt() preempt_check_resched() ++#else ++# define preempt_enable_no_resched() preempt_enable() ++# define preempt_check_resched_rt() barrier(); ++#endif + + #define preemptible() (preempt_count() == 0 && !irqs_disabled()) + +@@ -179,6 +218,13 @@ do { \ + __preempt_schedule(); \ + } while (0) + ++#define preempt_lazy_enable() \ ++do { \ ++ dec_preempt_lazy_count(); \ ++ barrier(); \ ++ preempt_check_resched(); \ ++} while (0) ++ + #else /* !CONFIG_PREEMPT */ + #define preempt_enable() \ + do { \ +@@ -224,6 +270,7 @@ do { \ + #define preempt_disable_notrace() barrier() + #define preempt_enable_no_resched_notrace() barrier() + #define preempt_enable_notrace() barrier() ++#define preempt_check_resched_rt() barrier() + #define preemptible() 0 + + #endif /* CONFIG_PREEMPT_COUNT */ +@@ -244,10 +291,31 @@ do { \ + } while (0) + #define preempt_fold_need_resched() \ + do { \ +- if (tif_need_resched()) \ ++ if (tif_need_resched_now()) \ + set_preempt_need_resched(); \ + } while (0) + ++#ifdef CONFIG_PREEMPT_RT_FULL ++# define preempt_disable_rt() preempt_disable() ++# define preempt_enable_rt() preempt_enable() ++# define preempt_disable_nort() barrier() ++# define preempt_enable_nort() barrier() ++# ifdef CONFIG_SMP ++ extern void migrate_disable(void); ++ extern void migrate_enable(void); ++# else /* CONFIG_SMP */ ++# define migrate_disable() barrier() ++# define migrate_enable() barrier() ++# endif /* CONFIG_SMP */ ++#else ++# define preempt_disable_rt() barrier() ++# define preempt_enable_rt() barrier() ++# define preempt_disable_nort() preempt_disable() ++# define preempt_enable_nort() preempt_enable() ++# define migrate_disable() preempt_disable() ++# define migrate_enable() preempt_enable() ++#endif ++ + #ifdef CONFIG_PREEMPT_NOTIFIERS + + struct preempt_notifier; +diff --git a/include/linux/printk.h b/include/linux/printk.h +index 696a56be7d3e..310aa321ef0c 100644 +--- a/include/linux/printk.h ++++ b/include/linux/printk.h +@@ -125,9 +125,11 @@ struct va_format { + #ifdef CONFIG_EARLY_PRINTK + extern asmlinkage __printf(1, 2) + void early_printk(const char *fmt, ...); ++extern void printk_kill(void); + #else + static inline __printf(1, 2) __cold + void early_printk(const char *s, ...) { } ++static inline void printk_kill(void) { } + #endif + + #ifdef CONFIG_PRINTK_NMI +diff --git a/include/linux/radix-tree.h b/include/linux/radix-tree.h +index 52b97db93830..fd9ea1c68db6 100644 +--- a/include/linux/radix-tree.h ++++ b/include/linux/radix-tree.h +@@ -289,9 +289,19 @@ unsigned int radix_tree_gang_lookup(struct radix_tree_root *root, + unsigned int radix_tree_gang_lookup_slot(struct radix_tree_root *root, + void ***results, unsigned long *indices, + unsigned long first_index, unsigned int max_items); ++#ifdef CONFIG_PREEMPT_RT_FULL ++static inline int radix_tree_preload(gfp_t gm) { return 0; } ++static inline int radix_tree_maybe_preload(gfp_t gfp_mask) { return 0; } ++static inline int radix_tree_maybe_preload_order(gfp_t gfp_mask, int order) ++{ ++ return 0; ++}; ++ ++#else + int radix_tree_preload(gfp_t gfp_mask); + int radix_tree_maybe_preload(gfp_t gfp_mask); + int radix_tree_maybe_preload_order(gfp_t gfp_mask, int order); ++#endif + void radix_tree_init(void); + void *radix_tree_tag_set(struct radix_tree_root *root, + unsigned long index, unsigned int tag); +@@ -316,7 +326,7 @@ unsigned long radix_tree_locate_item(struct radix_tree_root *root, void *item); + + static inline void radix_tree_preload_end(void) + { +- preempt_enable(); ++ preempt_enable_nort(); + } + + /** +diff --git a/include/linux/random.h b/include/linux/random.h +index 3d6e9815cd85..f6e8860b6494 100644 +--- a/include/linux/random.h ++++ b/include/linux/random.h +@@ -20,7 +20,7 @@ struct random_ready_callback { + extern void add_device_randomness(const void *, unsigned int); + extern void add_input_randomness(unsigned int type, unsigned int code, + unsigned int value); +-extern void add_interrupt_randomness(int irq, int irq_flags); ++extern void add_interrupt_randomness(int irq, int irq_flags, __u64 ip); + + extern void get_random_bytes(void *buf, int nbytes); + extern int add_random_ready_callback(struct random_ready_callback *rdy); +diff --git a/include/linux/rbtree.h b/include/linux/rbtree.h +index e585018498d5..25c64474fc27 100644 +--- a/include/linux/rbtree.h ++++ b/include/linux/rbtree.h +@@ -31,7 +31,7 @@ + + #include <linux/kernel.h> + #include <linux/stddef.h> +-#include <linux/rcupdate.h> ++#include <linux/rcu_assign_pointer.h> + + struct rb_node { + unsigned long __rb_parent_color; +diff --git a/include/linux/rbtree_augmented.h b/include/linux/rbtree_augmented.h +index d076183e49be..36bfb4dd57ae 100644 +--- a/include/linux/rbtree_augmented.h ++++ b/include/linux/rbtree_augmented.h +@@ -26,6 +26,7 @@ + + #include <linux/compiler.h> + #include <linux/rbtree.h> ++#include <linux/rcupdate.h> + + /* + * Please note - only struct rb_augment_callbacks and the prototypes for +diff --git a/include/linux/rcu_assign_pointer.h b/include/linux/rcu_assign_pointer.h +new file mode 100644 +index 000000000000..7066962a4379 +--- /dev/null ++++ b/include/linux/rcu_assign_pointer.h +@@ -0,0 +1,54 @@ ++#ifndef __LINUX_RCU_ASSIGN_POINTER_H__ ++#define __LINUX_RCU_ASSIGN_POINTER_H__ ++#include <linux/compiler.h> ++#include <asm/barrier.h> ++ ++/** ++ * RCU_INITIALIZER() - statically initialize an RCU-protected global variable ++ * @v: The value to statically initialize with. ++ */ ++#define RCU_INITIALIZER(v) (typeof(*(v)) __force __rcu *)(v) ++ ++/** ++ * rcu_assign_pointer() - assign to RCU-protected pointer ++ * @p: pointer to assign to ++ * @v: value to assign (publish) ++ * ++ * Assigns the specified value to the specified RCU-protected ++ * pointer, ensuring that any concurrent RCU readers will see ++ * any prior initialization. ++ * ++ * Inserts memory barriers on architectures that require them ++ * (which is most of them), and also prevents the compiler from ++ * reordering the code that initializes the structure after the pointer ++ * assignment. More importantly, this call documents which pointers ++ * will be dereferenced by RCU read-side code. ++ * ++ * In some special cases, you may use RCU_INIT_POINTER() instead ++ * of rcu_assign_pointer(). RCU_INIT_POINTER() is a bit faster due ++ * to the fact that it does not constrain either the CPU or the compiler. ++ * That said, using RCU_INIT_POINTER() when you should have used ++ * rcu_assign_pointer() is a very bad thing that results in ++ * impossible-to-diagnose memory corruption. So please be careful. ++ * See the RCU_INIT_POINTER() comment header for details. ++ * ++ * Note that rcu_assign_pointer() evaluates each of its arguments only ++ * once, appearances notwithstanding. One of the "extra" evaluations ++ * is in typeof() and the other visible only to sparse (__CHECKER__), ++ * neither of which actually execute the argument. As with most cpp ++ * macros, this execute-arguments-only-once property is important, so ++ * please be careful when making changes to rcu_assign_pointer() and the ++ * other macros that it invokes. ++ */ ++#define rcu_assign_pointer(p, v) \ ++({ \ ++ uintptr_t _r_a_p__v = (uintptr_t)(v); \ ++ \ ++ if (__builtin_constant_p(v) && (_r_a_p__v) == (uintptr_t)NULL) \ ++ WRITE_ONCE((p), (typeof(p))(_r_a_p__v)); \ ++ else \ ++ smp_store_release(&p, RCU_INITIALIZER((typeof(p))_r_a_p__v)); \ ++ _r_a_p__v; \ ++}) ++ ++#endif +diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h +index 1aa62e1a761b..2a614acb433e 100644 +--- a/include/linux/rcupdate.h ++++ b/include/linux/rcupdate.h +@@ -46,6 +46,7 @@ + #include <linux/compiler.h> + #include <linux/ktime.h> + #include <linux/irqflags.h> ++#include <linux/rcu_assign_pointer.h> + + #include <asm/barrier.h> + +@@ -178,6 +179,9 @@ void call_rcu(struct rcu_head *head, + + #endif /* #else #ifdef CONFIG_PREEMPT_RCU */ + ++#ifdef CONFIG_PREEMPT_RT_FULL ++#define call_rcu_bh call_rcu ++#else + /** + * call_rcu_bh() - Queue an RCU for invocation after a quicker grace period. + * @head: structure to be used for queueing the RCU updates. +@@ -201,6 +205,7 @@ void call_rcu(struct rcu_head *head, + */ + void call_rcu_bh(struct rcu_head *head, + rcu_callback_t func); ++#endif + + /** + * call_rcu_sched() - Queue an RCU for invocation after sched grace period. +@@ -301,6 +306,11 @@ void synchronize_rcu(void); + * types of kernel builds, the rcu_read_lock() nesting depth is unknowable. + */ + #define rcu_preempt_depth() (current->rcu_read_lock_nesting) ++#ifndef CONFIG_PREEMPT_RT_FULL ++#define sched_rcu_preempt_depth() rcu_preempt_depth() ++#else ++static inline int sched_rcu_preempt_depth(void) { return 0; } ++#endif + + #else /* #ifdef CONFIG_PREEMPT_RCU */ + +@@ -326,6 +336,8 @@ static inline int rcu_preempt_depth(void) + return 0; + } + ++#define sched_rcu_preempt_depth() rcu_preempt_depth() ++ + #endif /* #else #ifdef CONFIG_PREEMPT_RCU */ + + /* Internal to kernel */ +@@ -500,7 +512,14 @@ extern struct lockdep_map rcu_callback_map; + int debug_lockdep_rcu_enabled(void); + + int rcu_read_lock_held(void); ++#ifdef CONFIG_PREEMPT_RT_FULL ++static inline int rcu_read_lock_bh_held(void) ++{ ++ return rcu_read_lock_held(); ++} ++#else + int rcu_read_lock_bh_held(void); ++#endif + + /** + * rcu_read_lock_sched_held() - might we be in RCU-sched read-side critical section? +@@ -621,54 +640,6 @@ static inline void rcu_preempt_sleep_check(void) + }) + + /** +- * RCU_INITIALIZER() - statically initialize an RCU-protected global variable +- * @v: The value to statically initialize with. +- */ +-#define RCU_INITIALIZER(v) (typeof(*(v)) __force __rcu *)(v) +- +-/** +- * rcu_assign_pointer() - assign to RCU-protected pointer +- * @p: pointer to assign to +- * @v: value to assign (publish) +- * +- * Assigns the specified value to the specified RCU-protected +- * pointer, ensuring that any concurrent RCU readers will see +- * any prior initialization. +- * +- * Inserts memory barriers on architectures that require them +- * (which is most of them), and also prevents the compiler from +- * reordering the code that initializes the structure after the pointer +- * assignment. More importantly, this call documents which pointers +- * will be dereferenced by RCU read-side code. +- * +- * In some special cases, you may use RCU_INIT_POINTER() instead +- * of rcu_assign_pointer(). RCU_INIT_POINTER() is a bit faster due +- * to the fact that it does not constrain either the CPU or the compiler. +- * That said, using RCU_INIT_POINTER() when you should have used +- * rcu_assign_pointer() is a very bad thing that results in +- * impossible-to-diagnose memory corruption. So please be careful. +- * See the RCU_INIT_POINTER() comment header for details. +- * +- * Note that rcu_assign_pointer() evaluates each of its arguments only +- * once, appearances notwithstanding. One of the "extra" evaluations +- * is in typeof() and the other visible only to sparse (__CHECKER__), +- * neither of which actually execute the argument. As with most cpp +- * macros, this execute-arguments-only-once property is important, so +- * please be careful when making changes to rcu_assign_pointer() and the +- * other macros that it invokes. +- */ +-#define rcu_assign_pointer(p, v) \ +-({ \ +- uintptr_t _r_a_p__v = (uintptr_t)(v); \ +- \ +- if (__builtin_constant_p(v) && (_r_a_p__v) == (uintptr_t)NULL) \ +- WRITE_ONCE((p), (typeof(p))(_r_a_p__v)); \ +- else \ +- smp_store_release(&p, RCU_INITIALIZER((typeof(p))_r_a_p__v)); \ +- _r_a_p__v; \ +-}) +- +-/** + * rcu_access_pointer() - fetch RCU pointer with no dereferencing + * @p: The pointer to read + * +@@ -946,10 +917,14 @@ static inline void rcu_read_unlock(void) + static inline void rcu_read_lock_bh(void) + { + local_bh_disable(); ++#ifdef CONFIG_PREEMPT_RT_FULL ++ rcu_read_lock(); ++#else + __acquire(RCU_BH); + rcu_lock_acquire(&rcu_bh_lock_map); + RCU_LOCKDEP_WARN(!rcu_is_watching(), + "rcu_read_lock_bh() used illegally while idle"); ++#endif + } + + /* +@@ -959,10 +934,14 @@ static inline void rcu_read_lock_bh(void) + */ + static inline void rcu_read_unlock_bh(void) + { ++#ifdef CONFIG_PREEMPT_RT_FULL ++ rcu_read_unlock(); ++#else + RCU_LOCKDEP_WARN(!rcu_is_watching(), + "rcu_read_unlock_bh() used illegally while idle"); + rcu_lock_release(&rcu_bh_lock_map); + __release(RCU_BH); ++#endif + local_bh_enable(); + } + +diff --git a/include/linux/rcutree.h b/include/linux/rcutree.h +index 63a4e4cf40a5..08ab12df2863 100644 +--- a/include/linux/rcutree.h ++++ b/include/linux/rcutree.h +@@ -44,7 +44,11 @@ static inline void rcu_virt_note_context_switch(int cpu) + rcu_note_context_switch(); + } + ++#ifdef CONFIG_PREEMPT_RT_FULL ++# define synchronize_rcu_bh synchronize_rcu ++#else + void synchronize_rcu_bh(void); ++#endif + void synchronize_sched_expedited(void); + void synchronize_rcu_expedited(void); + +@@ -72,7 +76,11 @@ static inline void synchronize_rcu_bh_expedited(void) + } + + void rcu_barrier(void); ++#ifdef CONFIG_PREEMPT_RT_FULL ++# define rcu_barrier_bh rcu_barrier ++#else + void rcu_barrier_bh(void); ++#endif + void rcu_barrier_sched(void); + unsigned long get_state_synchronize_rcu(void); + void cond_synchronize_rcu(unsigned long oldstate); +@@ -82,17 +90,14 @@ void cond_synchronize_sched(unsigned long oldstate); + extern unsigned long rcutorture_testseq; + extern unsigned long rcutorture_vernum; + unsigned long rcu_batches_started(void); +-unsigned long rcu_batches_started_bh(void); + unsigned long rcu_batches_started_sched(void); + unsigned long rcu_batches_completed(void); +-unsigned long rcu_batches_completed_bh(void); + unsigned long rcu_batches_completed_sched(void); + unsigned long rcu_exp_batches_completed(void); + unsigned long rcu_exp_batches_completed_sched(void); + void show_rcu_gp_kthreads(void); + + void rcu_force_quiescent_state(void); +-void rcu_bh_force_quiescent_state(void); + void rcu_sched_force_quiescent_state(void); + + void rcu_idle_enter(void); +@@ -109,6 +114,16 @@ extern int rcu_scheduler_active __read_mostly; + + bool rcu_is_watching(void); + ++#ifndef CONFIG_PREEMPT_RT_FULL ++void rcu_bh_force_quiescent_state(void); ++unsigned long rcu_batches_started_bh(void); ++unsigned long rcu_batches_completed_bh(void); ++#else ++# define rcu_bh_force_quiescent_state rcu_force_quiescent_state ++# define rcu_batches_completed_bh rcu_batches_completed ++# define rcu_batches_started_bh rcu_batches_completed ++#endif ++ + void rcu_all_qs(void); + + /* RCUtree hotplug events */ +diff --git a/include/linux/rtmutex.h b/include/linux/rtmutex.h +index 1abba5ce2a2f..30211c627511 100644 +--- a/include/linux/rtmutex.h ++++ b/include/linux/rtmutex.h +@@ -13,11 +13,15 @@ + #define __LINUX_RT_MUTEX_H + + #include <linux/linkage.h> ++#include <linux/spinlock_types_raw.h> + #include <linux/rbtree.h> +-#include <linux/spinlock_types.h> + + extern int max_lock_depth; /* for sysctl */ + ++#ifdef CONFIG_DEBUG_MUTEXES ++#include <linux/debug_locks.h> ++#endif ++ + /** + * The rt_mutex structure + * +@@ -31,8 +35,8 @@ struct rt_mutex { + struct rb_root waiters; + struct rb_node *waiters_leftmost; + struct task_struct *owner; +-#ifdef CONFIG_DEBUG_RT_MUTEXES + int save_state; ++#ifdef CONFIG_DEBUG_RT_MUTEXES + const char *name, *file; + int line; + void *magic; +@@ -55,22 +59,33 @@ struct hrtimer_sleeper; + # define rt_mutex_debug_check_no_locks_held(task) do { } while (0) + #endif + ++# define rt_mutex_init(mutex) \ ++ do { \ ++ raw_spin_lock_init(&(mutex)->wait_lock); \ ++ __rt_mutex_init(mutex, #mutex); \ ++ } while (0) ++ + #ifdef CONFIG_DEBUG_RT_MUTEXES + # define __DEBUG_RT_MUTEX_INITIALIZER(mutexname) \ + , .name = #mutexname, .file = __FILE__, .line = __LINE__ +-# define rt_mutex_init(mutex) __rt_mutex_init(mutex, __func__) + extern void rt_mutex_debug_task_free(struct task_struct *tsk); + #else + # define __DEBUG_RT_MUTEX_INITIALIZER(mutexname) +-# define rt_mutex_init(mutex) __rt_mutex_init(mutex, NULL) + # define rt_mutex_debug_task_free(t) do { } while (0) + #endif + +-#define __RT_MUTEX_INITIALIZER(mutexname) \ +- { .wait_lock = __RAW_SPIN_LOCK_UNLOCKED(mutexname.wait_lock) \ ++#define __RT_MUTEX_INITIALIZER_PLAIN(mutexname) \ ++ .wait_lock = __RAW_SPIN_LOCK_UNLOCKED(mutexname.wait_lock) \ + , .waiters = RB_ROOT \ + , .owner = NULL \ +- __DEBUG_RT_MUTEX_INITIALIZER(mutexname)} ++ __DEBUG_RT_MUTEX_INITIALIZER(mutexname) ++ ++#define __RT_MUTEX_INITIALIZER(mutexname) \ ++ { __RT_MUTEX_INITIALIZER_PLAIN(mutexname) } ++ ++#define __RT_MUTEX_INITIALIZER_SAVE_STATE(mutexname) \ ++ { __RT_MUTEX_INITIALIZER_PLAIN(mutexname) \ ++ , .save_state = 1 } + + #define DEFINE_RT_MUTEX(mutexname) \ + struct rt_mutex mutexname = __RT_MUTEX_INITIALIZER(mutexname) +@@ -91,6 +106,7 @@ extern void rt_mutex_destroy(struct rt_mutex *lock); + + extern void rt_mutex_lock(struct rt_mutex *lock); + extern int rt_mutex_lock_interruptible(struct rt_mutex *lock); ++extern int rt_mutex_lock_killable(struct rt_mutex *lock); + extern int rt_mutex_timed_lock(struct rt_mutex *lock, + struct hrtimer_sleeper *timeout); + +diff --git a/include/linux/rwlock_rt.h b/include/linux/rwlock_rt.h +new file mode 100644 +index 000000000000..49ed2d45d3be +--- /dev/null ++++ b/include/linux/rwlock_rt.h +@@ -0,0 +1,99 @@ ++#ifndef __LINUX_RWLOCK_RT_H ++#define __LINUX_RWLOCK_RT_H ++ ++#ifndef __LINUX_SPINLOCK_H ++#error Do not include directly. Use spinlock.h ++#endif ++ ++#define rwlock_init(rwl) \ ++do { \ ++ static struct lock_class_key __key; \ ++ \ ++ rt_mutex_init(&(rwl)->lock); \ ++ __rt_rwlock_init(rwl, #rwl, &__key); \ ++} while (0) ++ ++extern void __lockfunc rt_write_lock(rwlock_t *rwlock); ++extern void __lockfunc rt_read_lock(rwlock_t *rwlock); ++extern int __lockfunc rt_write_trylock(rwlock_t *rwlock); ++extern int __lockfunc rt_write_trylock_irqsave(rwlock_t *trylock, unsigned long *flags); ++extern int __lockfunc rt_read_trylock(rwlock_t *rwlock); ++extern void __lockfunc rt_write_unlock(rwlock_t *rwlock); ++extern void __lockfunc rt_read_unlock(rwlock_t *rwlock); ++extern unsigned long __lockfunc rt_write_lock_irqsave(rwlock_t *rwlock); ++extern unsigned long __lockfunc rt_read_lock_irqsave(rwlock_t *rwlock); ++extern void __rt_rwlock_init(rwlock_t *rwlock, char *name, struct lock_class_key *key); ++ ++#define read_trylock(lock) __cond_lock(lock, rt_read_trylock(lock)) ++#define write_trylock(lock) __cond_lock(lock, rt_write_trylock(lock)) ++ ++#define write_trylock_irqsave(lock, flags) \ ++ __cond_lock(lock, rt_write_trylock_irqsave(lock, &flags)) ++ ++#define read_lock_irqsave(lock, flags) \ ++ do { \ ++ typecheck(unsigned long, flags); \ ++ flags = rt_read_lock_irqsave(lock); \ ++ } while (0) ++ ++#define write_lock_irqsave(lock, flags) \ ++ do { \ ++ typecheck(unsigned long, flags); \ ++ flags = rt_write_lock_irqsave(lock); \ ++ } while (0) ++ ++#define read_lock(lock) rt_read_lock(lock) ++ ++#define read_lock_bh(lock) \ ++ do { \ ++ local_bh_disable(); \ ++ rt_read_lock(lock); \ ++ } while (0) ++ ++#define read_lock_irq(lock) read_lock(lock) ++ ++#define write_lock(lock) rt_write_lock(lock) ++ ++#define write_lock_bh(lock) \ ++ do { \ ++ local_bh_disable(); \ ++ rt_write_lock(lock); \ ++ } while (0) ++ ++#define write_lock_irq(lock) write_lock(lock) ++ ++#define read_unlock(lock) rt_read_unlock(lock) ++ ++#define read_unlock_bh(lock) \ ++ do { \ ++ rt_read_unlock(lock); \ ++ local_bh_enable(); \ ++ } while (0) ++ ++#define read_unlock_irq(lock) read_unlock(lock) ++ ++#define write_unlock(lock) rt_write_unlock(lock) ++ ++#define write_unlock_bh(lock) \ ++ do { \ ++ rt_write_unlock(lock); \ ++ local_bh_enable(); \ ++ } while (0) ++ ++#define write_unlock_irq(lock) write_unlock(lock) ++ ++#define read_unlock_irqrestore(lock, flags) \ ++ do { \ ++ typecheck(unsigned long, flags); \ ++ (void) flags; \ ++ rt_read_unlock(lock); \ ++ } while (0) ++ ++#define write_unlock_irqrestore(lock, flags) \ ++ do { \ ++ typecheck(unsigned long, flags); \ ++ (void) flags; \ ++ rt_write_unlock(lock); \ ++ } while (0) ++ ++#endif +diff --git a/include/linux/rwlock_types.h b/include/linux/rwlock_types.h +index cc0072e93e36..5317cd957292 100644 +--- a/include/linux/rwlock_types.h ++++ b/include/linux/rwlock_types.h +@@ -1,6 +1,10 @@ + #ifndef __LINUX_RWLOCK_TYPES_H + #define __LINUX_RWLOCK_TYPES_H + ++#if !defined(__LINUX_SPINLOCK_TYPES_H) ++# error "Do not include directly, include spinlock_types.h" ++#endif ++ + /* + * include/linux/rwlock_types.h - generic rwlock type definitions + * and initializers +diff --git a/include/linux/rwlock_types_rt.h b/include/linux/rwlock_types_rt.h +new file mode 100644 +index 000000000000..51b28d775fe1 +--- /dev/null ++++ b/include/linux/rwlock_types_rt.h +@@ -0,0 +1,33 @@ ++#ifndef __LINUX_RWLOCK_TYPES_RT_H ++#define __LINUX_RWLOCK_TYPES_RT_H ++ ++#ifndef __LINUX_SPINLOCK_TYPES_H ++#error "Do not include directly. Include spinlock_types.h instead" ++#endif ++ ++/* ++ * rwlocks - rtmutex which allows single reader recursion ++ */ ++typedef struct { ++ struct rt_mutex lock; ++ int read_depth; ++ unsigned int break_lock; ++#ifdef CONFIG_DEBUG_LOCK_ALLOC ++ struct lockdep_map dep_map; ++#endif ++} rwlock_t; ++ ++#ifdef CONFIG_DEBUG_LOCK_ALLOC ++# define RW_DEP_MAP_INIT(lockname) .dep_map = { .name = #lockname } ++#else ++# define RW_DEP_MAP_INIT(lockname) ++#endif ++ ++#define __RW_LOCK_UNLOCKED(name) \ ++ { .lock = __RT_MUTEX_INITIALIZER_SAVE_STATE(name.lock), \ ++ RW_DEP_MAP_INIT(name) } ++ ++#define DEFINE_RWLOCK(name) \ ++ rwlock_t name = __RW_LOCK_UNLOCKED(name) ++ ++#endif +diff --git a/include/linux/rwsem.h b/include/linux/rwsem.h +index dd1d14250340..8e1f44ff1f2f 100644 +--- a/include/linux/rwsem.h ++++ b/include/linux/rwsem.h +@@ -19,6 +19,10 @@ + #include <linux/osq_lock.h> + #endif + ++#ifdef CONFIG_PREEMPT_RT_FULL ++#include <linux/rwsem_rt.h> ++#else /* PREEMPT_RT_FULL */ ++ + struct rw_semaphore; + + #ifdef CONFIG_RWSEM_GENERIC_SPINLOCK +@@ -184,4 +188,6 @@ extern void up_read_non_owner(struct rw_semaphore *sem); + # define up_read_non_owner(sem) up_read(sem) + #endif + ++#endif /* !PREEMPT_RT_FULL */ ++ + #endif /* _LINUX_RWSEM_H */ +diff --git a/include/linux/rwsem_rt.h b/include/linux/rwsem_rt.h +new file mode 100644 +index 000000000000..e26bd95a57c3 +--- /dev/null ++++ b/include/linux/rwsem_rt.h +@@ -0,0 +1,167 @@ ++#ifndef _LINUX_RWSEM_RT_H ++#define _LINUX_RWSEM_RT_H ++ ++#ifndef _LINUX_RWSEM_H ++#error "Include rwsem.h" ++#endif ++ ++/* ++ * RW-semaphores are a spinlock plus a reader-depth count. ++ * ++ * Note that the semantics are different from the usual ++ * Linux rw-sems, in PREEMPT_RT mode we do not allow ++ * multiple readers to hold the lock at once, we only allow ++ * a read-lock owner to read-lock recursively. This is ++ * better for latency, makes the implementation inherently ++ * fair and makes it simpler as well. ++ */ ++ ++#include <linux/rtmutex.h> ++ ++struct rw_semaphore { ++ struct rt_mutex lock; ++ int read_depth; ++#ifdef CONFIG_DEBUG_LOCK_ALLOC ++ struct lockdep_map dep_map; ++#endif ++}; ++ ++#define __RWSEM_INITIALIZER(name) \ ++ { .lock = __RT_MUTEX_INITIALIZER(name.lock), \ ++ RW_DEP_MAP_INIT(name) } ++ ++#define DECLARE_RWSEM(lockname) \ ++ struct rw_semaphore lockname = __RWSEM_INITIALIZER(lockname) ++ ++extern void __rt_rwsem_init(struct rw_semaphore *rwsem, const char *name, ++ struct lock_class_key *key); ++ ++#define __rt_init_rwsem(sem, name, key) \ ++ do { \ ++ rt_mutex_init(&(sem)->lock); \ ++ __rt_rwsem_init((sem), (name), (key));\ ++ } while (0) ++ ++#define __init_rwsem(sem, name, key) __rt_init_rwsem(sem, name, key) ++ ++# define rt_init_rwsem(sem) \ ++do { \ ++ static struct lock_class_key __key; \ ++ \ ++ __rt_init_rwsem((sem), #sem, &__key); \ ++} while (0) ++ ++extern void rt_down_write(struct rw_semaphore *rwsem); ++extern int rt_down_write_killable(struct rw_semaphore *rwsem); ++extern void rt_down_read_nested(struct rw_semaphore *rwsem, int subclass); ++extern void rt_down_write_nested(struct rw_semaphore *rwsem, int subclass); ++extern int rt_down_write_killable_nested(struct rw_semaphore *rwsem, ++ int subclass); ++extern void rt_down_write_nested_lock(struct rw_semaphore *rwsem, ++ struct lockdep_map *nest); ++extern void rt__down_read(struct rw_semaphore *rwsem); ++extern void rt_down_read(struct rw_semaphore *rwsem); ++extern int rt_down_write_trylock(struct rw_semaphore *rwsem); ++extern int rt__down_read_trylock(struct rw_semaphore *rwsem); ++extern int rt_down_read_trylock(struct rw_semaphore *rwsem); ++extern void __rt_up_read(struct rw_semaphore *rwsem); ++extern void rt_up_read(struct rw_semaphore *rwsem); ++extern void rt_up_write(struct rw_semaphore *rwsem); ++extern void rt_downgrade_write(struct rw_semaphore *rwsem); ++ ++#define init_rwsem(sem) rt_init_rwsem(sem) ++#define rwsem_is_locked(s) rt_mutex_is_locked(&(s)->lock) ++ ++static inline int rwsem_is_contended(struct rw_semaphore *sem) ++{ ++ /* rt_mutex_has_waiters() */ ++ return !RB_EMPTY_ROOT(&sem->lock.waiters); ++} ++ ++static inline void __down_read(struct rw_semaphore *sem) ++{ ++ rt__down_read(sem); ++} ++ ++static inline void down_read(struct rw_semaphore *sem) ++{ ++ rt_down_read(sem); ++} ++ ++static inline int __down_read_trylock(struct rw_semaphore *sem) ++{ ++ return rt__down_read_trylock(sem); ++} ++ ++static inline int down_read_trylock(struct rw_semaphore *sem) ++{ ++ return rt_down_read_trylock(sem); ++} ++ ++static inline void down_write(struct rw_semaphore *sem) ++{ ++ rt_down_write(sem); ++} ++ ++static inline int down_write_killable(struct rw_semaphore *sem) ++{ ++ return rt_down_write_killable(sem); ++} ++ ++static inline int down_write_trylock(struct rw_semaphore *sem) ++{ ++ return rt_down_write_trylock(sem); ++} ++ ++static inline void __up_read(struct rw_semaphore *sem) ++{ ++ __rt_up_read(sem); ++} ++ ++static inline void up_read(struct rw_semaphore *sem) ++{ ++ rt_up_read(sem); ++} ++ ++static inline void up_write(struct rw_semaphore *sem) ++{ ++ rt_up_write(sem); ++} ++ ++static inline void downgrade_write(struct rw_semaphore *sem) ++{ ++ rt_downgrade_write(sem); ++} ++ ++static inline void down_read_nested(struct rw_semaphore *sem, int subclass) ++{ ++ return rt_down_read_nested(sem, subclass); ++} ++ ++static inline void down_write_nested(struct rw_semaphore *sem, int subclass) ++{ ++ rt_down_write_nested(sem, subclass); ++} ++ ++static inline int down_write_killable_nested(struct rw_semaphore *sem, ++ int subclass) ++{ ++ return rt_down_write_killable_nested(sem, subclass); ++} ++ ++#ifdef CONFIG_DEBUG_LOCK_ALLOC ++static inline void down_write_nest_lock(struct rw_semaphore *sem, ++ struct rw_semaphore *nest_lock) ++{ ++ rt_down_write_nested_lock(sem, &nest_lock->dep_map); ++} ++ ++#else ++ ++static inline void down_write_nest_lock(struct rw_semaphore *sem, ++ struct rw_semaphore *nest_lock) ++{ ++ rt_down_write_nested_lock(sem, NULL); ++} ++#endif ++#endif +diff --git a/include/linux/sched.h b/include/linux/sched.h +index 62c68e513e39..c873ce0183ab 100644 +--- a/include/linux/sched.h ++++ b/include/linux/sched.h +@@ -26,6 +26,7 @@ struct sched_param { + #include <linux/nodemask.h> + #include <linux/mm_types.h> + #include <linux/preempt.h> ++#include <asm/kmap_types.h> + + #include <asm/page.h> + #include <asm/ptrace.h> +@@ -243,10 +244,7 @@ extern char ___assert_task_state[1 - 2*!!( + TASK_UNINTERRUPTIBLE | __TASK_STOPPED | \ + __TASK_TRACED | EXIT_ZOMBIE | EXIT_DEAD) + +-#define task_is_traced(task) ((task->state & __TASK_TRACED) != 0) + #define task_is_stopped(task) ((task->state & __TASK_STOPPED) != 0) +-#define task_is_stopped_or_traced(task) \ +- ((task->state & (__TASK_STOPPED | __TASK_TRACED)) != 0) + #define task_contributes_to_load(task) \ + ((task->state & TASK_UNINTERRUPTIBLE) != 0 && \ + (task->flags & PF_FROZEN) == 0 && \ +@@ -312,6 +310,11 @@ extern char ___assert_task_state[1 - 2*!!( + + #endif + ++#define __set_current_state_no_track(state_value) \ ++ do { current->state = (state_value); } while (0) ++#define set_current_state_no_track(state_value) \ ++ set_mb(current->state, (state_value)) ++ + /* Task command name length */ + #define TASK_COMM_LEN 16 + +@@ -1009,8 +1012,18 @@ struct wake_q_head { + struct wake_q_head name = { WAKE_Q_TAIL, &name.first } + + extern void wake_q_add(struct wake_q_head *head, +- struct task_struct *task); +-extern void wake_up_q(struct wake_q_head *head); ++ struct task_struct *task); ++extern void __wake_up_q(struct wake_q_head *head, bool sleeper); ++ ++static inline void wake_up_q(struct wake_q_head *head) ++{ ++ __wake_up_q(head, false); ++} ++ ++static inline void wake_up_q_sleeper(struct wake_q_head *head) ++{ ++ __wake_up_q(head, true); ++} + + /* + * sched-domains (multiprocessor balancing) declarations: +@@ -1459,6 +1472,7 @@ struct tlbflush_unmap_batch { + + struct task_struct { + volatile long state; /* -1 unrunnable, 0 runnable, >0 stopped */ ++ volatile long saved_state; /* saved state for "spinlock sleepers" */ + void *stack; + atomic_t usage; + unsigned int flags; /* per process flags, defined below */ +@@ -1495,6 +1509,12 @@ struct task_struct { + #endif + + unsigned int policy; ++#ifdef CONFIG_PREEMPT_RT_FULL ++ int migrate_disable; ++# ifdef CONFIG_SCHED_DEBUG ++ int migrate_disable_atomic; ++# endif ++#endif + int nr_cpus_allowed; + cpumask_t cpus_allowed; + +@@ -1629,6 +1649,9 @@ struct task_struct { + + struct task_cputime cputime_expires; + struct list_head cpu_timers[3]; ++#ifdef CONFIG_PREEMPT_RT_BASE ++ struct task_struct *posix_timer_list; ++#endif + + /* process credentials */ + const struct cred __rcu *real_cred; /* objective and real subjective task +@@ -1659,10 +1682,15 @@ struct task_struct { + /* signal handlers */ + struct signal_struct *signal; + struct sighand_struct *sighand; ++ struct sigqueue *sigqueue_cache; + + sigset_t blocked, real_blocked; + sigset_t saved_sigmask; /* restored if set_restore_sigmask() was used */ + struct sigpending pending; ++#ifdef CONFIG_PREEMPT_RT_FULL ++ /* TODO: move me into ->restart_block ? */ ++ struct siginfo forced_info; ++#endif + + unsigned long sas_ss_sp; + size_t sas_ss_size; +@@ -1891,6 +1919,12 @@ struct task_struct { + /* bitmask and counter of trace recursion */ + unsigned long trace_recursion; + #endif /* CONFIG_TRACING */ ++#ifdef CONFIG_WAKEUP_LATENCY_HIST ++ u64 preempt_timestamp_hist; ++#ifdef CONFIG_MISSED_TIMER_OFFSETS_HIST ++ long timer_offset; ++#endif ++#endif + #ifdef CONFIG_KCOV + /* Coverage collection mode enabled for this task (0 if disabled). */ + enum kcov_mode kcov_mode; +@@ -1916,9 +1950,23 @@ struct task_struct { + unsigned int sequential_io; + unsigned int sequential_io_avg; + #endif ++#ifdef CONFIG_PREEMPT_RT_BASE ++ struct rcu_head put_rcu; ++ int softirq_nestcnt; ++ unsigned int softirqs_raised; ++#endif ++#ifdef CONFIG_PREEMPT_RT_FULL ++# if defined CONFIG_HIGHMEM || defined CONFIG_X86_32 ++ int kmap_idx; ++ pte_t kmap_pte[KM_TYPE_NR]; ++# endif ++#endif + #ifdef CONFIG_DEBUG_ATOMIC_SLEEP + unsigned long task_state_change; + #endif ++#ifdef CONFIG_PREEMPT_RT_FULL ++ int xmit_recursion; ++#endif + int pagefault_disabled; + #ifdef CONFIG_MMU + struct task_struct *oom_reaper_list; +@@ -1939,14 +1987,6 @@ extern int arch_task_struct_size __read_mostly; + # define arch_task_struct_size (sizeof(struct task_struct)) + #endif + +-/* Future-safe accessor for struct task_struct's cpus_allowed. */ +-#define tsk_cpus_allowed(tsk) (&(tsk)->cpus_allowed) +- +-static inline int tsk_nr_cpus_allowed(struct task_struct *p) +-{ +- return p->nr_cpus_allowed; +-} +- + #define TNF_MIGRATED 0x01 + #define TNF_NO_GROUP 0x02 + #define TNF_SHARED 0x04 +@@ -2162,6 +2202,15 @@ extern struct pid *cad_pid; + extern void free_task(struct task_struct *tsk); + #define get_task_struct(tsk) do { atomic_inc(&(tsk)->usage); } while(0) + ++#ifdef CONFIG_PREEMPT_RT_BASE ++extern void __put_task_struct_cb(struct rcu_head *rhp); ++ ++static inline void put_task_struct(struct task_struct *t) ++{ ++ if (atomic_dec_and_test(&t->usage)) ++ call_rcu(&t->put_rcu, __put_task_struct_cb); ++} ++#else + extern void __put_task_struct(struct task_struct *t); + + static inline void put_task_struct(struct task_struct *t) +@@ -2169,6 +2218,7 @@ static inline void put_task_struct(struct task_struct *t) + if (atomic_dec_and_test(&t->usage)) + __put_task_struct(t); + } ++#endif + + struct task_struct *task_rcu_dereference(struct task_struct **ptask); + struct task_struct *try_get_task_struct(struct task_struct **ptask); +@@ -2210,6 +2260,7 @@ extern void thread_group_cputime_adjusted(struct task_struct *p, cputime_t *ut, + /* + * Per process flags + */ ++#define PF_IN_SOFTIRQ 0x00000001 /* Task is serving softirq */ + #define PF_EXITING 0x00000004 /* getting shut down */ + #define PF_EXITPIDONE 0x00000008 /* pi exit done on shut down */ + #define PF_VCPU 0x00000010 /* I'm a virtual CPU */ +@@ -2378,6 +2429,10 @@ extern void do_set_cpus_allowed(struct task_struct *p, + + extern int set_cpus_allowed_ptr(struct task_struct *p, + const struct cpumask *new_mask); ++int migrate_me(void); ++void tell_sched_cpu_down_begin(int cpu); ++void tell_sched_cpu_down_done(int cpu); ++ + #else + static inline void do_set_cpus_allowed(struct task_struct *p, + const struct cpumask *new_mask) +@@ -2390,6 +2445,9 @@ static inline int set_cpus_allowed_ptr(struct task_struct *p, + return -EINVAL; + return 0; + } ++static inline int migrate_me(void) { return 0; } ++static inline void tell_sched_cpu_down_begin(int cpu) { } ++static inline void tell_sched_cpu_down_done(int cpu) { } + #endif + + #ifdef CONFIG_NO_HZ_COMMON +@@ -2624,6 +2682,7 @@ extern void xtime_update(unsigned long ticks); + + extern int wake_up_state(struct task_struct *tsk, unsigned int state); + extern int wake_up_process(struct task_struct *tsk); ++extern int wake_up_lock_sleeper(struct task_struct * tsk); + extern void wake_up_new_task(struct task_struct *tsk); + #ifdef CONFIG_SMP + extern void kick_process(struct task_struct *tsk); +@@ -2832,6 +2891,17 @@ static inline void mmdrop(struct mm_struct *mm) + __mmdrop(mm); + } + ++#ifdef CONFIG_PREEMPT_RT_BASE ++extern void __mmdrop_delayed(struct rcu_head *rhp); ++static inline void mmdrop_delayed(struct mm_struct *mm) ++{ ++ if (atomic_dec_and_test(&mm->mm_count)) ++ call_rcu(&mm->delayed_drop, __mmdrop_delayed); ++} ++#else ++# define mmdrop_delayed(mm) mmdrop(mm) ++#endif ++ + static inline bool mmget_not_zero(struct mm_struct *mm) + { + return atomic_inc_not_zero(&mm->mm_users); +@@ -3168,6 +3238,43 @@ static inline int test_tsk_need_resched(struct task_struct *tsk) + return unlikely(test_tsk_thread_flag(tsk,TIF_NEED_RESCHED)); + } + ++#ifdef CONFIG_PREEMPT_LAZY ++static inline void set_tsk_need_resched_lazy(struct task_struct *tsk) ++{ ++ set_tsk_thread_flag(tsk,TIF_NEED_RESCHED_LAZY); ++} ++ ++static inline void clear_tsk_need_resched_lazy(struct task_struct *tsk) ++{ ++ clear_tsk_thread_flag(tsk,TIF_NEED_RESCHED_LAZY); ++} ++ ++static inline int test_tsk_need_resched_lazy(struct task_struct *tsk) ++{ ++ return unlikely(test_tsk_thread_flag(tsk,TIF_NEED_RESCHED_LAZY)); ++} ++ ++static inline int need_resched_lazy(void) ++{ ++ return test_thread_flag(TIF_NEED_RESCHED_LAZY); ++} ++ ++static inline int need_resched_now(void) ++{ ++ return test_thread_flag(TIF_NEED_RESCHED); ++} ++ ++#else ++static inline void clear_tsk_need_resched_lazy(struct task_struct *tsk) { } ++static inline int need_resched_lazy(void) { return 0; } ++ ++static inline int need_resched_now(void) ++{ ++ return test_thread_flag(TIF_NEED_RESCHED); ++} ++ ++#endif ++ + static inline int restart_syscall(void) + { + set_tsk_thread_flag(current, TIF_SIGPENDING); +@@ -3199,6 +3306,51 @@ static inline int signal_pending_state(long state, struct task_struct *p) + return (state & TASK_INTERRUPTIBLE) || __fatal_signal_pending(p); + } + ++static inline bool __task_is_stopped_or_traced(struct task_struct *task) ++{ ++ if (task->state & (__TASK_STOPPED | __TASK_TRACED)) ++ return true; ++#ifdef CONFIG_PREEMPT_RT_FULL ++ if (task->saved_state & (__TASK_STOPPED | __TASK_TRACED)) ++ return true; ++#endif ++ return false; ++} ++ ++static inline bool task_is_stopped_or_traced(struct task_struct *task) ++{ ++ bool traced_stopped; ++ ++#ifdef CONFIG_PREEMPT_RT_FULL ++ unsigned long flags; ++ ++ raw_spin_lock_irqsave(&task->pi_lock, flags); ++ traced_stopped = __task_is_stopped_or_traced(task); ++ raw_spin_unlock_irqrestore(&task->pi_lock, flags); ++#else ++ traced_stopped = __task_is_stopped_or_traced(task); ++#endif ++ return traced_stopped; ++} ++ ++static inline bool task_is_traced(struct task_struct *task) ++{ ++ bool traced = false; ++ ++ if (task->state & __TASK_TRACED) ++ return true; ++#ifdef CONFIG_PREEMPT_RT_FULL ++ /* in case the task is sleeping on tasklist_lock */ ++ raw_spin_lock_irq(&task->pi_lock); ++ if (task->state & __TASK_TRACED) ++ traced = true; ++ else if (task->saved_state & __TASK_TRACED) ++ traced = true; ++ raw_spin_unlock_irq(&task->pi_lock); ++#endif ++ return traced; ++} ++ + /* + * cond_resched() and cond_resched_lock(): latency reduction via + * explicit rescheduling in places that are safe. The return +@@ -3220,12 +3372,16 @@ extern int __cond_resched_lock(spinlock_t *lock); + __cond_resched_lock(lock); \ + }) + ++#ifndef CONFIG_PREEMPT_RT_FULL + extern int __cond_resched_softirq(void); + + #define cond_resched_softirq() ({ \ + ___might_sleep(__FILE__, __LINE__, SOFTIRQ_DISABLE_OFFSET); \ + __cond_resched_softirq(); \ + }) ++#else ++# define cond_resched_softirq() cond_resched() ++#endif + + static inline void cond_resched_rcu(void) + { +@@ -3387,6 +3543,31 @@ static inline void set_task_cpu(struct task_struct *p, unsigned int cpu) + + #endif /* CONFIG_SMP */ + ++static inline int __migrate_disabled(struct task_struct *p) ++{ ++#ifdef CONFIG_PREEMPT_RT_FULL ++ return p->migrate_disable; ++#else ++ return 0; ++#endif ++} ++ ++/* Future-safe accessor for struct task_struct's cpus_allowed. */ ++static inline const struct cpumask *tsk_cpus_allowed(struct task_struct *p) ++{ ++ if (__migrate_disabled(p)) ++ return cpumask_of(task_cpu(p)); ++ ++ return &p->cpus_allowed; ++} ++ ++static inline int tsk_nr_cpus_allowed(struct task_struct *p) ++{ ++ if (__migrate_disabled(p)) ++ return 1; ++ return p->nr_cpus_allowed; ++} ++ + extern long sched_setaffinity(pid_t pid, const struct cpumask *new_mask); + extern long sched_getaffinity(pid_t pid, struct cpumask *mask); + +diff --git a/include/linux/seqlock.h b/include/linux/seqlock.h +index ead97654c4e9..3d7223ffdd3b 100644 +--- a/include/linux/seqlock.h ++++ b/include/linux/seqlock.h +@@ -220,20 +220,30 @@ static inline int read_seqcount_retry(const seqcount_t *s, unsigned start) + return __read_seqcount_retry(s, start); + } + +- +- +-static inline void raw_write_seqcount_begin(seqcount_t *s) ++static inline void __raw_write_seqcount_begin(seqcount_t *s) + { + s->sequence++; + smp_wmb(); + } + +-static inline void raw_write_seqcount_end(seqcount_t *s) ++static inline void raw_write_seqcount_begin(seqcount_t *s) ++{ ++ preempt_disable_rt(); ++ __raw_write_seqcount_begin(s); ++} ++ ++static inline void __raw_write_seqcount_end(seqcount_t *s) + { + smp_wmb(); + s->sequence++; + } + ++static inline void raw_write_seqcount_end(seqcount_t *s) ++{ ++ __raw_write_seqcount_end(s); ++ preempt_enable_rt(); ++} ++ + /** + * raw_write_seqcount_barrier - do a seq write barrier + * @s: pointer to seqcount_t +@@ -428,10 +438,32 @@ typedef struct { + /* + * Read side functions for starting and finalizing a read side section. + */ ++#ifndef CONFIG_PREEMPT_RT_FULL + static inline unsigned read_seqbegin(const seqlock_t *sl) + { + return read_seqcount_begin(&sl->seqcount); + } ++#else ++/* ++ * Starvation safe read side for RT ++ */ ++static inline unsigned read_seqbegin(seqlock_t *sl) ++{ ++ unsigned ret; ++ ++repeat: ++ ret = ACCESS_ONCE(sl->seqcount.sequence); ++ if (unlikely(ret & 1)) { ++ /* ++ * Take the lock and let the writer proceed (i.e. evtl ++ * boost it), otherwise we could loop here forever. ++ */ ++ spin_unlock_wait(&sl->lock); ++ goto repeat; ++ } ++ return ret; ++} ++#endif + + static inline unsigned read_seqretry(const seqlock_t *sl, unsigned start) + { +@@ -446,36 +478,45 @@ static inline unsigned read_seqretry(const seqlock_t *sl, unsigned start) + static inline void write_seqlock(seqlock_t *sl) + { + spin_lock(&sl->lock); +- write_seqcount_begin(&sl->seqcount); ++ __raw_write_seqcount_begin(&sl->seqcount); ++} ++ ++static inline int try_write_seqlock(seqlock_t *sl) ++{ ++ if (spin_trylock(&sl->lock)) { ++ __raw_write_seqcount_begin(&sl->seqcount); ++ return 1; ++ } ++ return 0; + } + + static inline void write_sequnlock(seqlock_t *sl) + { +- write_seqcount_end(&sl->seqcount); ++ __raw_write_seqcount_end(&sl->seqcount); + spin_unlock(&sl->lock); + } + + static inline void write_seqlock_bh(seqlock_t *sl) + { + spin_lock_bh(&sl->lock); +- write_seqcount_begin(&sl->seqcount); ++ __raw_write_seqcount_begin(&sl->seqcount); + } + + static inline void write_sequnlock_bh(seqlock_t *sl) + { +- write_seqcount_end(&sl->seqcount); ++ __raw_write_seqcount_end(&sl->seqcount); + spin_unlock_bh(&sl->lock); + } + + static inline void write_seqlock_irq(seqlock_t *sl) + { + spin_lock_irq(&sl->lock); +- write_seqcount_begin(&sl->seqcount); ++ __raw_write_seqcount_begin(&sl->seqcount); + } + + static inline void write_sequnlock_irq(seqlock_t *sl) + { +- write_seqcount_end(&sl->seqcount); ++ __raw_write_seqcount_end(&sl->seqcount); + spin_unlock_irq(&sl->lock); + } + +@@ -484,7 +525,7 @@ static inline unsigned long __write_seqlock_irqsave(seqlock_t *sl) + unsigned long flags; + + spin_lock_irqsave(&sl->lock, flags); +- write_seqcount_begin(&sl->seqcount); ++ __raw_write_seqcount_begin(&sl->seqcount); + return flags; + } + +@@ -494,7 +535,7 @@ static inline unsigned long __write_seqlock_irqsave(seqlock_t *sl) + static inline void + write_sequnlock_irqrestore(seqlock_t *sl, unsigned long flags) + { +- write_seqcount_end(&sl->seqcount); ++ __raw_write_seqcount_end(&sl->seqcount); + spin_unlock_irqrestore(&sl->lock, flags); + } + +diff --git a/include/linux/signal.h b/include/linux/signal.h +index b63f63eaa39c..295540fdfc72 100644 +--- a/include/linux/signal.h ++++ b/include/linux/signal.h +@@ -233,6 +233,7 @@ static inline void init_sigpending(struct sigpending *sig) + } + + extern void flush_sigqueue(struct sigpending *queue); ++extern void flush_task_sigqueue(struct task_struct *tsk); + + /* Test if 'sig' is valid signal. Use this instead of testing _NSIG directly */ + static inline int valid_signal(unsigned long sig) +diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h +index 0f665cb26b50..59c38d1635c8 100644 +--- a/include/linux/skbuff.h ++++ b/include/linux/skbuff.h +@@ -284,6 +284,7 @@ struct sk_buff_head { + + __u32 qlen; + spinlock_t lock; ++ raw_spinlock_t raw_lock; + }; + + struct sk_buff; +@@ -1565,6 +1566,12 @@ static inline void skb_queue_head_init(struct sk_buff_head *list) + __skb_queue_head_init(list); + } + ++static inline void skb_queue_head_init_raw(struct sk_buff_head *list) ++{ ++ raw_spin_lock_init(&list->raw_lock); ++ __skb_queue_head_init(list); ++} ++ + static inline void skb_queue_head_init_class(struct sk_buff_head *list, + struct lock_class_key *class) + { +diff --git a/include/linux/smp.h b/include/linux/smp.h +index eccae4690f41..64ec52d951c3 100644 +--- a/include/linux/smp.h ++++ b/include/linux/smp.h +@@ -185,6 +185,9 @@ static inline void smp_init(void) { } + #define get_cpu() ({ preempt_disable(); smp_processor_id(); }) + #define put_cpu() preempt_enable() + ++#define get_cpu_light() ({ migrate_disable(); smp_processor_id(); }) ++#define put_cpu_light() migrate_enable() ++ + /* + * Callback to arch code if there's nosmp or maxcpus=0 on the + * boot command line: +diff --git a/include/linux/spinlock.h b/include/linux/spinlock.h +index 47dd0cebd204..02928fa5499d 100644 +--- a/include/linux/spinlock.h ++++ b/include/linux/spinlock.h +@@ -271,7 +271,11 @@ static inline void do_raw_spin_unlock(raw_spinlock_t *lock) __releases(lock) + #define raw_spin_can_lock(lock) (!raw_spin_is_locked(lock)) + + /* Include rwlock functions */ +-#include <linux/rwlock.h> ++#ifdef CONFIG_PREEMPT_RT_FULL ++# include <linux/rwlock_rt.h> ++#else ++# include <linux/rwlock.h> ++#endif + + /* + * Pull the _spin_*()/_read_*()/_write_*() functions/declarations: +@@ -282,6 +286,10 @@ static inline void do_raw_spin_unlock(raw_spinlock_t *lock) __releases(lock) + # include <linux/spinlock_api_up.h> + #endif + ++#ifdef CONFIG_PREEMPT_RT_FULL ++# include <linux/spinlock_rt.h> ++#else /* PREEMPT_RT_FULL */ ++ + /* + * Map the spin_lock functions to the raw variants for PREEMPT_RT=n + */ +@@ -347,6 +355,12 @@ static __always_inline void spin_unlock(spinlock_t *lock) + raw_spin_unlock(&lock->rlock); + } + ++static __always_inline int spin_unlock_no_deboost(spinlock_t *lock) ++{ ++ raw_spin_unlock(&lock->rlock); ++ return 0; ++} ++ + static __always_inline void spin_unlock_bh(spinlock_t *lock) + { + raw_spin_unlock_bh(&lock->rlock); +@@ -416,4 +430,6 @@ extern int _atomic_dec_and_lock(atomic_t *atomic, spinlock_t *lock); + #define atomic_dec_and_lock(atomic, lock) \ + __cond_lock(lock, _atomic_dec_and_lock(atomic, lock)) + ++#endif /* !PREEMPT_RT_FULL */ ++ + #endif /* __LINUX_SPINLOCK_H */ +diff --git a/include/linux/spinlock_api_smp.h b/include/linux/spinlock_api_smp.h +index 5344268e6e62..043263f30e81 100644 +--- a/include/linux/spinlock_api_smp.h ++++ b/include/linux/spinlock_api_smp.h +@@ -189,6 +189,8 @@ static inline int __raw_spin_trylock_bh(raw_spinlock_t *lock) + return 0; + } + +-#include <linux/rwlock_api_smp.h> ++#ifndef CONFIG_PREEMPT_RT_FULL ++# include <linux/rwlock_api_smp.h> ++#endif + + #endif /* __LINUX_SPINLOCK_API_SMP_H */ +diff --git a/include/linux/spinlock_rt.h b/include/linux/spinlock_rt.h +new file mode 100644 +index 000000000000..7eb87584e843 +--- /dev/null ++++ b/include/linux/spinlock_rt.h +@@ -0,0 +1,165 @@ ++#ifndef __LINUX_SPINLOCK_RT_H ++#define __LINUX_SPINLOCK_RT_H ++ ++#ifndef __LINUX_SPINLOCK_H ++#error Do not include directly. Use spinlock.h ++#endif ++ ++#include <linux/bug.h> ++ ++extern void ++__rt_spin_lock_init(spinlock_t *lock, char *name, struct lock_class_key *key); ++ ++#define spin_lock_init(slock) \ ++do { \ ++ static struct lock_class_key __key; \ ++ \ ++ rt_mutex_init(&(slock)->lock); \ ++ __rt_spin_lock_init(slock, #slock, &__key); \ ++} while (0) ++ ++void __lockfunc rt_spin_lock__no_mg(spinlock_t *lock); ++void __lockfunc rt_spin_unlock__no_mg(spinlock_t *lock); ++int __lockfunc rt_spin_trylock__no_mg(spinlock_t *lock); ++ ++extern void __lockfunc rt_spin_lock(spinlock_t *lock); ++extern unsigned long __lockfunc rt_spin_lock_trace_flags(spinlock_t *lock); ++extern void __lockfunc rt_spin_lock_nested(spinlock_t *lock, int subclass); ++extern void __lockfunc rt_spin_unlock(spinlock_t *lock); ++extern int __lockfunc rt_spin_unlock_no_deboost(spinlock_t *lock); ++extern void __lockfunc rt_spin_unlock_wait(spinlock_t *lock); ++extern int __lockfunc rt_spin_trylock_irqsave(spinlock_t *lock, unsigned long *flags); ++extern int __lockfunc rt_spin_trylock_bh(spinlock_t *lock); ++extern int __lockfunc rt_spin_trylock(spinlock_t *lock); ++extern int atomic_dec_and_spin_lock(atomic_t *atomic, spinlock_t *lock); ++ ++/* ++ * lockdep-less calls, for derived types like rwlock: ++ * (for trylock they can use rt_mutex_trylock() directly. ++ */ ++extern void __lockfunc __rt_spin_lock__no_mg(struct rt_mutex *lock); ++extern void __lockfunc __rt_spin_lock(struct rt_mutex *lock); ++extern void __lockfunc __rt_spin_unlock(struct rt_mutex *lock); ++extern int __lockfunc __rt_spin_trylock(struct rt_mutex *lock); ++ ++#define spin_lock(lock) rt_spin_lock(lock) ++ ++#define spin_lock_bh(lock) \ ++ do { \ ++ local_bh_disable(); \ ++ rt_spin_lock(lock); \ ++ } while (0) ++ ++#define spin_lock_irq(lock) spin_lock(lock) ++ ++#define spin_do_trylock(lock) __cond_lock(lock, rt_spin_trylock(lock)) ++ ++#define spin_trylock(lock) \ ++({ \ ++ int __locked; \ ++ __locked = spin_do_trylock(lock); \ ++ __locked; \ ++}) ++ ++#ifdef CONFIG_LOCKDEP ++# define spin_lock_nested(lock, subclass) \ ++ do { \ ++ rt_spin_lock_nested(lock, subclass); \ ++ } while (0) ++ ++#define spin_lock_bh_nested(lock, subclass) \ ++ do { \ ++ local_bh_disable(); \ ++ rt_spin_lock_nested(lock, subclass); \ ++ } while (0) ++ ++# define spin_lock_irqsave_nested(lock, flags, subclass) \ ++ do { \ ++ typecheck(unsigned long, flags); \ ++ flags = 0; \ ++ rt_spin_lock_nested(lock, subclass); \ ++ } while (0) ++#else ++# define spin_lock_nested(lock, subclass) spin_lock(lock) ++# define spin_lock_bh_nested(lock, subclass) spin_lock_bh(lock) ++ ++# define spin_lock_irqsave_nested(lock, flags, subclass) \ ++ do { \ ++ typecheck(unsigned long, flags); \ ++ flags = 0; \ ++ spin_lock(lock); \ ++ } while (0) ++#endif ++ ++#define spin_lock_irqsave(lock, flags) \ ++ do { \ ++ typecheck(unsigned long, flags); \ ++ flags = 0; \ ++ spin_lock(lock); \ ++ } while (0) ++ ++static inline unsigned long spin_lock_trace_flags(spinlock_t *lock) ++{ ++ unsigned long flags = 0; ++#ifdef CONFIG_TRACE_IRQFLAGS ++ flags = rt_spin_lock_trace_flags(lock); ++#else ++ spin_lock(lock); /* lock_local */ ++#endif ++ return flags; ++} ++ ++/* FIXME: we need rt_spin_lock_nest_lock */ ++#define spin_lock_nest_lock(lock, nest_lock) spin_lock_nested(lock, 0) ++ ++#define spin_unlock(lock) rt_spin_unlock(lock) ++#define spin_unlock_no_deboost(lock) rt_spin_unlock_no_deboost(lock) ++ ++#define spin_unlock_bh(lock) \ ++ do { \ ++ rt_spin_unlock(lock); \ ++ local_bh_enable(); \ ++ } while (0) ++ ++#define spin_unlock_irq(lock) spin_unlock(lock) ++ ++#define spin_unlock_irqrestore(lock, flags) \ ++ do { \ ++ typecheck(unsigned long, flags); \ ++ (void) flags; \ ++ spin_unlock(lock); \ ++ } while (0) ++ ++#define spin_trylock_bh(lock) __cond_lock(lock, rt_spin_trylock_bh(lock)) ++#define spin_trylock_irq(lock) spin_trylock(lock) ++ ++#define spin_trylock_irqsave(lock, flags) \ ++ rt_spin_trylock_irqsave(lock, &(flags)) ++ ++#define spin_unlock_wait(lock) rt_spin_unlock_wait(lock) ++ ++#ifdef CONFIG_GENERIC_LOCKBREAK ++# define spin_is_contended(lock) ((lock)->break_lock) ++#else ++# define spin_is_contended(lock) (((void)(lock), 0)) ++#endif ++ ++static inline int spin_can_lock(spinlock_t *lock) ++{ ++ return !rt_mutex_is_locked(&lock->lock); ++} ++ ++static inline int spin_is_locked(spinlock_t *lock) ++{ ++ return rt_mutex_is_locked(&lock->lock); ++} ++ ++static inline void assert_spin_locked(spinlock_t *lock) ++{ ++ BUG_ON(!spin_is_locked(lock)); ++} ++ ++#define atomic_dec_and_lock(atomic, lock) \ ++ atomic_dec_and_spin_lock(atomic, lock) ++ ++#endif +diff --git a/include/linux/spinlock_types.h b/include/linux/spinlock_types.h +index 73548eb13a5d..10bac715ea96 100644 +--- a/include/linux/spinlock_types.h ++++ b/include/linux/spinlock_types.h +@@ -9,80 +9,15 @@ + * Released under the General Public License (GPL). + */ + +-#if defined(CONFIG_SMP) +-# include <asm/spinlock_types.h> ++#include <linux/spinlock_types_raw.h> ++ ++#ifndef CONFIG_PREEMPT_RT_FULL ++# include <linux/spinlock_types_nort.h> ++# include <linux/rwlock_types.h> + #else +-# include <linux/spinlock_types_up.h> ++# include <linux/rtmutex.h> ++# include <linux/spinlock_types_rt.h> ++# include <linux/rwlock_types_rt.h> + #endif + +-#include <linux/lockdep.h> +- +-typedef struct raw_spinlock { +- arch_spinlock_t raw_lock; +-#ifdef CONFIG_GENERIC_LOCKBREAK +- unsigned int break_lock; +-#endif +-#ifdef CONFIG_DEBUG_SPINLOCK +- unsigned int magic, owner_cpu; +- void *owner; +-#endif +-#ifdef CONFIG_DEBUG_LOCK_ALLOC +- struct lockdep_map dep_map; +-#endif +-} raw_spinlock_t; +- +-#define SPINLOCK_MAGIC 0xdead4ead +- +-#define SPINLOCK_OWNER_INIT ((void *)-1L) +- +-#ifdef CONFIG_DEBUG_LOCK_ALLOC +-# define SPIN_DEP_MAP_INIT(lockname) .dep_map = { .name = #lockname } +-#else +-# define SPIN_DEP_MAP_INIT(lockname) +-#endif +- +-#ifdef CONFIG_DEBUG_SPINLOCK +-# define SPIN_DEBUG_INIT(lockname) \ +- .magic = SPINLOCK_MAGIC, \ +- .owner_cpu = -1, \ +- .owner = SPINLOCK_OWNER_INIT, +-#else +-# define SPIN_DEBUG_INIT(lockname) +-#endif +- +-#define __RAW_SPIN_LOCK_INITIALIZER(lockname) \ +- { \ +- .raw_lock = __ARCH_SPIN_LOCK_UNLOCKED, \ +- SPIN_DEBUG_INIT(lockname) \ +- SPIN_DEP_MAP_INIT(lockname) } +- +-#define __RAW_SPIN_LOCK_UNLOCKED(lockname) \ +- (raw_spinlock_t) __RAW_SPIN_LOCK_INITIALIZER(lockname) +- +-#define DEFINE_RAW_SPINLOCK(x) raw_spinlock_t x = __RAW_SPIN_LOCK_UNLOCKED(x) +- +-typedef struct spinlock { +- union { +- struct raw_spinlock rlock; +- +-#ifdef CONFIG_DEBUG_LOCK_ALLOC +-# define LOCK_PADSIZE (offsetof(struct raw_spinlock, dep_map)) +- struct { +- u8 __padding[LOCK_PADSIZE]; +- struct lockdep_map dep_map; +- }; +-#endif +- }; +-} spinlock_t; +- +-#define __SPIN_LOCK_INITIALIZER(lockname) \ +- { { .rlock = __RAW_SPIN_LOCK_INITIALIZER(lockname) } } +- +-#define __SPIN_LOCK_UNLOCKED(lockname) \ +- (spinlock_t ) __SPIN_LOCK_INITIALIZER(lockname) +- +-#define DEFINE_SPINLOCK(x) spinlock_t x = __SPIN_LOCK_UNLOCKED(x) +- +-#include <linux/rwlock_types.h> +- + #endif /* __LINUX_SPINLOCK_TYPES_H */ +diff --git a/include/linux/spinlock_types_nort.h b/include/linux/spinlock_types_nort.h +new file mode 100644 +index 000000000000..f1dac1fb1d6a +--- /dev/null ++++ b/include/linux/spinlock_types_nort.h +@@ -0,0 +1,33 @@ ++#ifndef __LINUX_SPINLOCK_TYPES_NORT_H ++#define __LINUX_SPINLOCK_TYPES_NORT_H ++ ++#ifndef __LINUX_SPINLOCK_TYPES_H ++#error "Do not include directly. Include spinlock_types.h instead" ++#endif ++ ++/* ++ * The non RT version maps spinlocks to raw_spinlocks ++ */ ++typedef struct spinlock { ++ union { ++ struct raw_spinlock rlock; ++ ++#ifdef CONFIG_DEBUG_LOCK_ALLOC ++# define LOCK_PADSIZE (offsetof(struct raw_spinlock, dep_map)) ++ struct { ++ u8 __padding[LOCK_PADSIZE]; ++ struct lockdep_map dep_map; ++ }; ++#endif ++ }; ++} spinlock_t; ++ ++#define __SPIN_LOCK_INITIALIZER(lockname) \ ++ { { .rlock = __RAW_SPIN_LOCK_INITIALIZER(lockname) } } ++ ++#define __SPIN_LOCK_UNLOCKED(lockname) \ ++ (spinlock_t ) __SPIN_LOCK_INITIALIZER(lockname) ++ ++#define DEFINE_SPINLOCK(x) spinlock_t x = __SPIN_LOCK_UNLOCKED(x) ++ ++#endif +diff --git a/include/linux/spinlock_types_raw.h b/include/linux/spinlock_types_raw.h +new file mode 100644 +index 000000000000..edffc4d53fc9 +--- /dev/null ++++ b/include/linux/spinlock_types_raw.h +@@ -0,0 +1,56 @@ ++#ifndef __LINUX_SPINLOCK_TYPES_RAW_H ++#define __LINUX_SPINLOCK_TYPES_RAW_H ++ ++#if defined(CONFIG_SMP) ++# include <asm/spinlock_types.h> ++#else ++# include <linux/spinlock_types_up.h> ++#endif ++ ++#include <linux/lockdep.h> ++ ++typedef struct raw_spinlock { ++ arch_spinlock_t raw_lock; ++#ifdef CONFIG_GENERIC_LOCKBREAK ++ unsigned int break_lock; ++#endif ++#ifdef CONFIG_DEBUG_SPINLOCK ++ unsigned int magic, owner_cpu; ++ void *owner; ++#endif ++#ifdef CONFIG_DEBUG_LOCK_ALLOC ++ struct lockdep_map dep_map; ++#endif ++} raw_spinlock_t; ++ ++#define SPINLOCK_MAGIC 0xdead4ead ++ ++#define SPINLOCK_OWNER_INIT ((void *)-1L) ++ ++#ifdef CONFIG_DEBUG_LOCK_ALLOC ++# define SPIN_DEP_MAP_INIT(lockname) .dep_map = { .name = #lockname } ++#else ++# define SPIN_DEP_MAP_INIT(lockname) ++#endif ++ ++#ifdef CONFIG_DEBUG_SPINLOCK ++# define SPIN_DEBUG_INIT(lockname) \ ++ .magic = SPINLOCK_MAGIC, \ ++ .owner_cpu = -1, \ ++ .owner = SPINLOCK_OWNER_INIT, ++#else ++# define SPIN_DEBUG_INIT(lockname) ++#endif ++ ++#define __RAW_SPIN_LOCK_INITIALIZER(lockname) \ ++ { \ ++ .raw_lock = __ARCH_SPIN_LOCK_UNLOCKED, \ ++ SPIN_DEBUG_INIT(lockname) \ ++ SPIN_DEP_MAP_INIT(lockname) } ++ ++#define __RAW_SPIN_LOCK_UNLOCKED(lockname) \ ++ (raw_spinlock_t) __RAW_SPIN_LOCK_INITIALIZER(lockname) ++ ++#define DEFINE_RAW_SPINLOCK(x) raw_spinlock_t x = __RAW_SPIN_LOCK_UNLOCKED(x) ++ ++#endif +diff --git a/include/linux/spinlock_types_rt.h b/include/linux/spinlock_types_rt.h +new file mode 100644 +index 000000000000..3e3d8c5f7a9a +--- /dev/null ++++ b/include/linux/spinlock_types_rt.h +@@ -0,0 +1,48 @@ ++#ifndef __LINUX_SPINLOCK_TYPES_RT_H ++#define __LINUX_SPINLOCK_TYPES_RT_H ++ ++#ifndef __LINUX_SPINLOCK_TYPES_H ++#error "Do not include directly. Include spinlock_types.h instead" ++#endif ++ ++#include <linux/cache.h> ++ ++/* ++ * PREEMPT_RT: spinlocks - an RT mutex plus lock-break field: ++ */ ++typedef struct spinlock { ++ struct rt_mutex lock; ++ unsigned int break_lock; ++#ifdef CONFIG_DEBUG_LOCK_ALLOC ++ struct lockdep_map dep_map; ++#endif ++} spinlock_t; ++ ++#ifdef CONFIG_DEBUG_RT_MUTEXES ++# define __RT_SPIN_INITIALIZER(name) \ ++ { \ ++ .wait_lock = __RAW_SPIN_LOCK_UNLOCKED(name.wait_lock), \ ++ .save_state = 1, \ ++ .file = __FILE__, \ ++ .line = __LINE__ , \ ++ } ++#else ++# define __RT_SPIN_INITIALIZER(name) \ ++ { \ ++ .wait_lock = __RAW_SPIN_LOCK_UNLOCKED(name.wait_lock), \ ++ .save_state = 1, \ ++ } ++#endif ++ ++/* ++.wait_list = PLIST_HEAD_INIT_RAW((name).lock.wait_list, (name).lock.wait_lock) ++*/ ++ ++#define __SPIN_LOCK_UNLOCKED(name) \ ++ { .lock = __RT_SPIN_INITIALIZER(name.lock), \ ++ SPIN_DEP_MAP_INIT(name) } ++ ++#define DEFINE_SPINLOCK(name) \ ++ spinlock_t name = __SPIN_LOCK_UNLOCKED(name) ++ ++#endif +diff --git a/include/linux/srcu.h b/include/linux/srcu.h +index dc8eb63c6568..e793d3a257da 100644 +--- a/include/linux/srcu.h ++++ b/include/linux/srcu.h +@@ -84,10 +84,10 @@ int init_srcu_struct(struct srcu_struct *sp); + + void process_srcu(struct work_struct *work); + +-#define __SRCU_STRUCT_INIT(name) \ ++#define __SRCU_STRUCT_INIT(name, pcpu_name) \ + { \ + .completed = -300, \ +- .per_cpu_ref = &name##_srcu_array, \ ++ .per_cpu_ref = &pcpu_name, \ + .queue_lock = __SPIN_LOCK_UNLOCKED(name.queue_lock), \ + .running = false, \ + .batch_queue = RCU_BATCH_INIT(name.batch_queue), \ +@@ -119,7 +119,7 @@ void process_srcu(struct work_struct *work); + */ + #define __DEFINE_SRCU(name, is_static) \ + static DEFINE_PER_CPU(struct srcu_struct_array, name##_srcu_array);\ +- is_static struct srcu_struct name = __SRCU_STRUCT_INIT(name) ++ is_static struct srcu_struct name = __SRCU_STRUCT_INIT(name, name##_srcu_array) + #define DEFINE_SRCU(name) __DEFINE_SRCU(name, /* not static */) + #define DEFINE_STATIC_SRCU(name) __DEFINE_SRCU(name, static) + +diff --git a/include/linux/suspend.h b/include/linux/suspend.h +index 7693e39b14fe..b36eedeb28d1 100644 +--- a/include/linux/suspend.h ++++ b/include/linux/suspend.h +@@ -193,6 +193,12 @@ struct platform_freeze_ops { + void (*end)(void); + }; + ++#if defined(CONFIG_SUSPEND) || defined(CONFIG_HIBERNATION) ++extern bool pm_in_action; ++#else ++# define pm_in_action false ++#endif ++ + #ifdef CONFIG_SUSPEND + /** + * suspend_set_ops - set platform dependent suspend operations +diff --git a/include/linux/swait.h b/include/linux/swait.h +index c1f9c62a8a50..83f004a72320 100644 +--- a/include/linux/swait.h ++++ b/include/linux/swait.h +@@ -87,6 +87,7 @@ static inline int swait_active(struct swait_queue_head *q) + extern void swake_up(struct swait_queue_head *q); + extern void swake_up_all(struct swait_queue_head *q); + extern void swake_up_locked(struct swait_queue_head *q); ++extern void swake_up_all_locked(struct swait_queue_head *q); + + extern void __prepare_to_swait(struct swait_queue_head *q, struct swait_queue *wait); + extern void prepare_to_swait(struct swait_queue_head *q, struct swait_queue *wait, int state); +diff --git a/include/linux/swap.h b/include/linux/swap.h +index e1d761463243..4ae9a4434ad3 100644 +--- a/include/linux/swap.h ++++ b/include/linux/swap.h +@@ -11,6 +11,7 @@ + #include <linux/fs.h> + #include <linux/atomic.h> + #include <linux/page-flags.h> ++#include <linux/locallock.h> + #include <asm/page.h> + + struct notifier_block; +@@ -243,7 +244,8 @@ struct swap_info_struct { + void *workingset_eviction(struct address_space *mapping, struct page *page); + bool workingset_refault(void *shadow); + void workingset_activation(struct page *page); +-extern struct list_lru workingset_shadow_nodes; ++extern struct list_lru __workingset_shadow_nodes; ++DECLARE_LOCAL_IRQ_LOCK(workingset_shadow_lock); + + static inline unsigned int workingset_node_pages(struct radix_tree_node *node) + { +@@ -288,6 +290,7 @@ extern unsigned long nr_free_pagecache_pages(void); + + + /* linux/mm/swap.c */ ++DECLARE_LOCAL_IRQ_LOCK(swapvec_lock); + extern void lru_cache_add(struct page *); + extern void lru_cache_add_anon(struct page *page); + extern void lru_cache_add_file(struct page *page); +diff --git a/include/linux/swork.h b/include/linux/swork.h +new file mode 100644 +index 000000000000..f175fa9a6016 +--- /dev/null ++++ b/include/linux/swork.h +@@ -0,0 +1,24 @@ ++#ifndef _LINUX_SWORK_H ++#define _LINUX_SWORK_H ++ ++#include <linux/list.h> ++ ++struct swork_event { ++ struct list_head item; ++ unsigned long flags; ++ void (*func)(struct swork_event *); ++}; ++ ++static inline void INIT_SWORK(struct swork_event *event, ++ void (*func)(struct swork_event *)) ++{ ++ event->flags = 0; ++ event->func = func; ++} ++ ++bool swork_queue(struct swork_event *sev); ++ ++int swork_get(void); ++void swork_put(void); ++ ++#endif /* _LINUX_SWORK_H */ +diff --git a/include/linux/thread_info.h b/include/linux/thread_info.h +index 2b5b10eed74f..8bf15b1858f5 100644 +--- a/include/linux/thread_info.h ++++ b/include/linux/thread_info.h +@@ -103,7 +103,17 @@ static inline int test_ti_thread_flag(struct thread_info *ti, int flag) + #define test_thread_flag(flag) \ + test_ti_thread_flag(current_thread_info(), flag) + +-#define tif_need_resched() test_thread_flag(TIF_NEED_RESCHED) ++#ifdef CONFIG_PREEMPT_LAZY ++#define tif_need_resched() (test_thread_flag(TIF_NEED_RESCHED) || \ ++ test_thread_flag(TIF_NEED_RESCHED_LAZY)) ++#define tif_need_resched_now() (test_thread_flag(TIF_NEED_RESCHED)) ++#define tif_need_resched_lazy() test_thread_flag(TIF_NEED_RESCHED_LAZY)) ++ ++#else ++#define tif_need_resched() test_thread_flag(TIF_NEED_RESCHED) ++#define tif_need_resched_now() test_thread_flag(TIF_NEED_RESCHED) ++#define tif_need_resched_lazy() 0 ++#endif + + #ifndef CONFIG_HAVE_ARCH_WITHIN_STACK_FRAMES + static inline int arch_within_stack_frames(const void * const stack, +diff --git a/include/linux/timer.h b/include/linux/timer.h +index 51d601f192d4..83cea629efe1 100644 +--- a/include/linux/timer.h ++++ b/include/linux/timer.h +@@ -241,7 +241,7 @@ extern void add_timer(struct timer_list *timer); + + extern int try_to_del_timer_sync(struct timer_list *timer); + +-#ifdef CONFIG_SMP ++#if defined(CONFIG_SMP) || defined(CONFIG_PREEMPT_RT_FULL) + extern int del_timer_sync(struct timer_list *timer); + #else + # define del_timer_sync(t) del_timer(t) +diff --git a/include/linux/trace_events.h b/include/linux/trace_events.h +index be007610ceb0..15154b13a53b 100644 +--- a/include/linux/trace_events.h ++++ b/include/linux/trace_events.h +@@ -56,6 +56,9 @@ struct trace_entry { + unsigned char flags; + unsigned char preempt_count; + int pid; ++ unsigned short migrate_disable; ++ unsigned short padding; ++ unsigned char preempt_lazy_count; + }; + + #define TRACE_EVENT_TYPE_MAX \ +diff --git a/include/linux/uaccess.h b/include/linux/uaccess.h +index f30c187ed785..83bf0f798426 100644 +--- a/include/linux/uaccess.h ++++ b/include/linux/uaccess.h +@@ -24,6 +24,7 @@ static __always_inline void pagefault_disabled_dec(void) + */ + static inline void pagefault_disable(void) + { ++ migrate_disable(); + pagefault_disabled_inc(); + /* + * make sure to have issued the store before a pagefault +@@ -40,6 +41,7 @@ static inline void pagefault_enable(void) + */ + barrier(); + pagefault_disabled_dec(); ++ migrate_enable(); + } + + /* +diff --git a/include/linux/uprobes.h b/include/linux/uprobes.h +index 4a29c75b146e..0a294e950df8 100644 +--- a/include/linux/uprobes.h ++++ b/include/linux/uprobes.h +@@ -27,6 +27,7 @@ + #include <linux/errno.h> + #include <linux/rbtree.h> + #include <linux/types.h> ++#include <linux/wait.h> + + struct vm_area_struct; + struct mm_struct; +diff --git a/include/linux/vmstat.h b/include/linux/vmstat.h +index 613771909b6e..e28c5a43229d 100644 +--- a/include/linux/vmstat.h ++++ b/include/linux/vmstat.h +@@ -33,7 +33,9 @@ DECLARE_PER_CPU(struct vm_event_state, vm_event_states); + */ + static inline void __count_vm_event(enum vm_event_item item) + { ++ preempt_disable_rt(); + raw_cpu_inc(vm_event_states.event[item]); ++ preempt_enable_rt(); + } + + static inline void count_vm_event(enum vm_event_item item) +@@ -43,7 +45,9 @@ static inline void count_vm_event(enum vm_event_item item) + + static inline void __count_vm_events(enum vm_event_item item, long delta) + { ++ preempt_disable_rt(); + raw_cpu_add(vm_event_states.event[item], delta); ++ preempt_enable_rt(); + } + + static inline void count_vm_events(enum vm_event_item item, long delta) +diff --git a/include/linux/wait.h b/include/linux/wait.h +index c3ff74d764fa..60222150a409 100644 +--- a/include/linux/wait.h ++++ b/include/linux/wait.h +@@ -8,6 +8,7 @@ + #include <linux/spinlock.h> + #include <asm/current.h> + #include <uapi/linux/wait.h> ++#include <linux/atomic.h> + + typedef struct __wait_queue wait_queue_t; + typedef int (*wait_queue_func_t)(wait_queue_t *wait, unsigned mode, int flags, void *key); +diff --git a/include/net/dst.h b/include/net/dst.h +index 6835d224d47b..55a5a9698f14 100644 +--- a/include/net/dst.h ++++ b/include/net/dst.h +@@ -446,7 +446,7 @@ static inline void dst_confirm(struct dst_entry *dst) + static inline int dst_neigh_output(struct dst_entry *dst, struct neighbour *n, + struct sk_buff *skb) + { +- const struct hh_cache *hh; ++ struct hh_cache *hh; + + if (dst->pending_confirm) { + unsigned long now = jiffies; +diff --git a/include/net/gen_stats.h b/include/net/gen_stats.h +index 231e121cc7d9..d125222b979d 100644 +--- a/include/net/gen_stats.h ++++ b/include/net/gen_stats.h +@@ -5,6 +5,7 @@ + #include <linux/socket.h> + #include <linux/rtnetlink.h> + #include <linux/pkt_sched.h> ++#include <net/net_seq_lock.h> + + struct gnet_stats_basic_cpu { + struct gnet_stats_basic_packed bstats; +@@ -33,11 +34,11 @@ int gnet_stats_start_copy_compat(struct sk_buff *skb, int type, + spinlock_t *lock, struct gnet_dump *d, + int padattr); + +-int gnet_stats_copy_basic(const seqcount_t *running, ++int gnet_stats_copy_basic(net_seqlock_t *running, + struct gnet_dump *d, + struct gnet_stats_basic_cpu __percpu *cpu, + struct gnet_stats_basic_packed *b); +-void __gnet_stats_copy_basic(const seqcount_t *running, ++void __gnet_stats_copy_basic(net_seqlock_t *running, + struct gnet_stats_basic_packed *bstats, + struct gnet_stats_basic_cpu __percpu *cpu, + struct gnet_stats_basic_packed *b); +@@ -55,14 +56,14 @@ int gen_new_estimator(struct gnet_stats_basic_packed *bstats, + struct gnet_stats_basic_cpu __percpu *cpu_bstats, + struct gnet_stats_rate_est64 *rate_est, + spinlock_t *stats_lock, +- seqcount_t *running, struct nlattr *opt); ++ net_seqlock_t *running, struct nlattr *opt); + void gen_kill_estimator(struct gnet_stats_basic_packed *bstats, + struct gnet_stats_rate_est64 *rate_est); + int gen_replace_estimator(struct gnet_stats_basic_packed *bstats, + struct gnet_stats_basic_cpu __percpu *cpu_bstats, + struct gnet_stats_rate_est64 *rate_est, + spinlock_t *stats_lock, +- seqcount_t *running, struct nlattr *opt); ++ net_seqlock_t *running, struct nlattr *opt); + bool gen_estimator_active(const struct gnet_stats_basic_packed *bstats, + const struct gnet_stats_rate_est64 *rate_est); + #endif +diff --git a/include/net/neighbour.h b/include/net/neighbour.h +index 8b683841e574..bf656008f6e7 100644 +--- a/include/net/neighbour.h ++++ b/include/net/neighbour.h +@@ -446,7 +446,7 @@ static inline int neigh_hh_bridge(struct hh_cache *hh, struct sk_buff *skb) + } + #endif + +-static inline int neigh_hh_output(const struct hh_cache *hh, struct sk_buff *skb) ++static inline int neigh_hh_output(struct hh_cache *hh, struct sk_buff *skb) + { + unsigned int seq; + int hh_len; +@@ -501,7 +501,7 @@ struct neighbour_cb { + + #define NEIGH_CB(skb) ((struct neighbour_cb *)(skb)->cb) + +-static inline void neigh_ha_snapshot(char *dst, const struct neighbour *n, ++static inline void neigh_ha_snapshot(char *dst, struct neighbour *n, + const struct net_device *dev) + { + unsigned int seq; +diff --git a/include/net/net_seq_lock.h b/include/net/net_seq_lock.h +new file mode 100644 +index 000000000000..a7034298a82a +--- /dev/null ++++ b/include/net/net_seq_lock.h +@@ -0,0 +1,15 @@ ++#ifndef __NET_NET_SEQ_LOCK_H__ ++#define __NET_NET_SEQ_LOCK_H__ ++ ++#ifdef CONFIG_PREEMPT_RT_BASE ++# define net_seqlock_t seqlock_t ++# define net_seq_begin(__r) read_seqbegin(__r) ++# define net_seq_retry(__r, __s) read_seqretry(__r, __s) ++ ++#else ++# define net_seqlock_t seqcount_t ++# define net_seq_begin(__r) read_seqcount_begin(__r) ++# define net_seq_retry(__r, __s) read_seqcount_retry(__r, __s) ++#endif ++ ++#endif +diff --git a/include/net/netns/ipv4.h b/include/net/netns/ipv4.h +index d061ffeb1e71..12ef433dc3b8 100644 +--- a/include/net/netns/ipv4.h ++++ b/include/net/netns/ipv4.h +@@ -70,6 +70,7 @@ struct netns_ipv4 { + + int sysctl_icmp_echo_ignore_all; + int sysctl_icmp_echo_ignore_broadcasts; ++ int sysctl_icmp_echo_sysrq; + int sysctl_icmp_ignore_bogus_error_responses; + int sysctl_icmp_ratelimit; + int sysctl_icmp_ratemask; +diff --git a/include/net/sch_generic.h b/include/net/sch_generic.h +index 909aff2db2b3..c47219d6e4bc 100644 +--- a/include/net/sch_generic.h ++++ b/include/net/sch_generic.h +@@ -10,6 +10,7 @@ + #include <linux/dynamic_queue_limits.h> + #include <net/gen_stats.h> + #include <net/rtnetlink.h> ++#include <net/net_seq_lock.h> + + struct Qdisc_ops; + struct qdisc_walker; +@@ -78,7 +79,7 @@ struct Qdisc { + struct sk_buff *gso_skb ____cacheline_aligned_in_smp; + struct sk_buff_head q; + struct gnet_stats_basic_packed bstats; +- seqcount_t running; ++ net_seqlock_t running; + struct gnet_stats_queue qstats; + unsigned long state; + struct Qdisc *next_sched; +@@ -90,13 +91,22 @@ struct Qdisc { + spinlock_t busylock ____cacheline_aligned_in_smp; + }; + +-static inline bool qdisc_is_running(const struct Qdisc *qdisc) ++static inline bool qdisc_is_running(struct Qdisc *qdisc) + { ++#ifdef CONFIG_PREEMPT_RT_BASE ++ return spin_is_locked(&qdisc->running.lock) ? true : false; ++#else + return (raw_read_seqcount(&qdisc->running) & 1) ? true : false; ++#endif + } + + static inline bool qdisc_run_begin(struct Qdisc *qdisc) + { ++#ifdef CONFIG_PREEMPT_RT_BASE ++ if (try_write_seqlock(&qdisc->running)) ++ return true; ++ return false; ++#else + if (qdisc_is_running(qdisc)) + return false; + /* Variant of write_seqcount_begin() telling lockdep a trylock +@@ -105,11 +115,16 @@ static inline bool qdisc_run_begin(struct Qdisc *qdisc) + raw_write_seqcount_begin(&qdisc->running); + seqcount_acquire(&qdisc->running.dep_map, 0, 1, _RET_IP_); + return true; ++#endif + } + + static inline void qdisc_run_end(struct Qdisc *qdisc) + { ++#ifdef CONFIG_PREEMPT_RT_BASE ++ write_sequnlock(&qdisc->running); ++#else + write_seqcount_end(&qdisc->running); ++#endif + } + + static inline bool qdisc_may_bulk(const struct Qdisc *qdisc) +@@ -300,7 +315,7 @@ static inline spinlock_t *qdisc_root_sleeping_lock(const struct Qdisc *qdisc) + return qdisc_lock(root); + } + +-static inline seqcount_t *qdisc_root_sleeping_running(const struct Qdisc *qdisc) ++static inline net_seqlock_t *qdisc_root_sleeping_running(const struct Qdisc *qdisc) + { + struct Qdisc *root = qdisc_root_sleeping(qdisc); + +diff --git a/include/trace/events/hist.h b/include/trace/events/hist.h +new file mode 100644 +index 000000000000..f7710de1b1f3 +--- /dev/null ++++ b/include/trace/events/hist.h +@@ -0,0 +1,73 @@ ++#undef TRACE_SYSTEM ++#define TRACE_SYSTEM hist ++ ++#if !defined(_TRACE_HIST_H) || defined(TRACE_HEADER_MULTI_READ) ++#define _TRACE_HIST_H ++ ++#include "latency_hist.h" ++#include <linux/tracepoint.h> ++ ++#if !defined(CONFIG_PREEMPT_OFF_HIST) && !defined(CONFIG_INTERRUPT_OFF_HIST) ++#define trace_preemptirqsoff_hist(a, b) ++#define trace_preemptirqsoff_hist_rcuidle(a, b) ++#else ++TRACE_EVENT(preemptirqsoff_hist, ++ ++ TP_PROTO(int reason, int starthist), ++ ++ TP_ARGS(reason, starthist), ++ ++ TP_STRUCT__entry( ++ __field(int, reason) ++ __field(int, starthist) ++ ), ++ ++ TP_fast_assign( ++ __entry->reason = reason; ++ __entry->starthist = starthist; ++ ), ++ ++ TP_printk("reason=%s starthist=%s", getaction(__entry->reason), ++ __entry->starthist ? "start" : "stop") ++); ++#endif ++ ++#ifndef CONFIG_MISSED_TIMER_OFFSETS_HIST ++#define trace_hrtimer_interrupt(a, b, c, d) ++#else ++TRACE_EVENT(hrtimer_interrupt, ++ ++ TP_PROTO(int cpu, long long offset, struct task_struct *curr, ++ struct task_struct *task), ++ ++ TP_ARGS(cpu, offset, curr, task), ++ ++ TP_STRUCT__entry( ++ __field(int, cpu) ++ __field(long long, offset) ++ __array(char, ccomm, TASK_COMM_LEN) ++ __field(int, cprio) ++ __array(char, tcomm, TASK_COMM_LEN) ++ __field(int, tprio) ++ ), ++ ++ TP_fast_assign( ++ __entry->cpu = cpu; ++ __entry->offset = offset; ++ memcpy(__entry->ccomm, curr->comm, TASK_COMM_LEN); ++ __entry->cprio = curr->prio; ++ memcpy(__entry->tcomm, task != NULL ? task->comm : "<none>", ++ task != NULL ? TASK_COMM_LEN : 7); ++ __entry->tprio = task != NULL ? task->prio : -1; ++ ), ++ ++ TP_printk("cpu=%d offset=%lld curr=%s[%d] thread=%s[%d]", ++ __entry->cpu, __entry->offset, __entry->ccomm, ++ __entry->cprio, __entry->tcomm, __entry->tprio) ++); ++#endif ++ ++#endif /* _TRACE_HIST_H */ ++ ++/* This part must be outside protection */ ++#include <trace/define_trace.h> +diff --git a/include/trace/events/latency_hist.h b/include/trace/events/latency_hist.h +new file mode 100644 +index 000000000000..d3f2fbd560b1 +--- /dev/null ++++ b/include/trace/events/latency_hist.h +@@ -0,0 +1,29 @@ ++#ifndef _LATENCY_HIST_H ++#define _LATENCY_HIST_H ++ ++enum hist_action { ++ IRQS_ON, ++ PREEMPT_ON, ++ TRACE_STOP, ++ IRQS_OFF, ++ PREEMPT_OFF, ++ TRACE_START, ++}; ++ ++static char *actions[] = { ++ "IRQS_ON", ++ "PREEMPT_ON", ++ "TRACE_STOP", ++ "IRQS_OFF", ++ "PREEMPT_OFF", ++ "TRACE_START", ++}; ++ ++static inline char *getaction(int action) ++{ ++ if (action >= 0 && action <= sizeof(actions)/sizeof(actions[0])) ++ return actions[action]; ++ return "unknown"; ++} ++ ++#endif /* _LATENCY_HIST_H */ +diff --git a/init/Kconfig b/init/Kconfig +index cac3f096050d..b6c9166d878a 100644 +--- a/init/Kconfig ++++ b/init/Kconfig +@@ -496,7 +496,7 @@ config TINY_RCU + + config RCU_EXPERT + bool "Make expert-level adjustments to RCU configuration" +- default n ++ default y if PREEMPT_RT_FULL + help + This option needs to be enabled if you wish to make + expert-level adjustments to RCU configuration. By default, +@@ -613,7 +613,7 @@ config RCU_FANOUT_LEAF + + config RCU_FAST_NO_HZ + bool "Accelerate last non-dyntick-idle CPU's grace periods" +- depends on NO_HZ_COMMON && SMP && RCU_EXPERT ++ depends on NO_HZ_COMMON && SMP && RCU_EXPERT && !PREEMPT_RT_FULL + default n + help + This option permits CPUs to enter dynticks-idle state even if +@@ -640,7 +640,7 @@ config TREE_RCU_TRACE + config RCU_BOOST + bool "Enable RCU priority boosting" + depends on RT_MUTEXES && PREEMPT_RCU && RCU_EXPERT +- default n ++ default y if PREEMPT_RT_FULL + help + This option boosts the priority of preempted RCU readers that + block the current preemptible RCU grace period for too long. +@@ -1054,6 +1054,7 @@ config CFS_BANDWIDTH + config RT_GROUP_SCHED + bool "Group scheduling for SCHED_RR/FIFO" + depends on CGROUP_SCHED ++ depends on !PREEMPT_RT_FULL + default n + help + This feature lets you explicitly allocate real CPU bandwidth +@@ -1761,6 +1762,7 @@ choice + + config SLAB + bool "SLAB" ++ depends on !PREEMPT_RT_FULL + select HAVE_HARDENED_USERCOPY_ALLOCATOR + help + The regular slab allocator that is established and known to work +@@ -1781,6 +1783,7 @@ config SLUB + config SLOB + depends on EXPERT + bool "SLOB (Simple Allocator)" ++ depends on !PREEMPT_RT_FULL + help + SLOB replaces the stock allocator with a drastically simpler + allocator. SLOB is generally more space efficient but +@@ -1799,7 +1802,7 @@ config SLAB_FREELIST_RANDOM + + config SLUB_CPU_PARTIAL + default y +- depends on SLUB && SMP ++ depends on SLUB && SMP && !PREEMPT_RT_FULL + bool "SLUB per cpu partial cache" + help + Per cpu partial caches accellerate objects allocation and freeing +diff --git a/init/Makefile b/init/Makefile +index 7bc47ee31c36..88cf473554e0 100644 +--- a/init/Makefile ++++ b/init/Makefile +@@ -33,4 +33,4 @@ $(obj)/version.o: include/generated/compile.h + include/generated/compile.h: FORCE + @$($(quiet)chk_compile.h) + $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkcompile_h $@ \ +- "$(UTS_MACHINE)" "$(CONFIG_SMP)" "$(CONFIG_PREEMPT)" "$(CC) $(KBUILD_CFLAGS)" ++ "$(UTS_MACHINE)" "$(CONFIG_SMP)" "$(CONFIG_PREEMPT)" "$(CONFIG_PREEMPT_RT_FULL)" "$(CC) $(KBUILD_CFLAGS)" +diff --git a/init/main.c b/init/main.c +index a8a58e2794a5..e4c979e37a91 100644 +--- a/init/main.c ++++ b/init/main.c +@@ -507,6 +507,7 @@ asmlinkage __visible void __init start_kernel(void) + setup_command_line(command_line); + setup_nr_cpu_ids(); + setup_per_cpu_areas(); ++ softirq_early_init(); + boot_cpu_state_init(); + smp_prepare_boot_cpu(); /* arch-specific boot-cpu hooks */ + +diff --git a/ipc/msg.c b/ipc/msg.c +index c6521c205cb4..996d89023552 100644 +--- a/ipc/msg.c ++++ b/ipc/msg.c +@@ -183,20 +183,14 @@ static void ss_wakeup(struct list_head *h, int kill) + } + } + +-static void expunge_all(struct msg_queue *msq, int res) ++static void expunge_all(struct msg_queue *msq, int res, ++ struct wake_q_head *wake_q) + { + struct msg_receiver *msr, *t; + + list_for_each_entry_safe(msr, t, &msq->q_receivers, r_list) { +- msr->r_msg = NULL; /* initialize expunge ordering */ +- wake_up_process(msr->r_tsk); +- /* +- * Ensure that the wakeup is visible before setting r_msg as +- * the receiving end depends on it: either spinning on a nil, +- * or dealing with -EAGAIN cases. See lockless receive part 1 +- * and 2 in do_msgrcv(). +- */ +- smp_wmb(); /* barrier (B) */ ++ ++ wake_q_add(wake_q, msr->r_tsk); + msr->r_msg = ERR_PTR(res); + } + } +@@ -213,11 +207,13 @@ static void freeque(struct ipc_namespace *ns, struct kern_ipc_perm *ipcp) + { + struct msg_msg *msg, *t; + struct msg_queue *msq = container_of(ipcp, struct msg_queue, q_perm); ++ WAKE_Q(wake_q); + +- expunge_all(msq, -EIDRM); ++ expunge_all(msq, -EIDRM, &wake_q); + ss_wakeup(&msq->q_senders, 1); + msg_rmid(ns, msq); + ipc_unlock_object(&msq->q_perm); ++ wake_up_q(&wake_q); + rcu_read_unlock(); + + list_for_each_entry_safe(msg, t, &msq->q_messages, m_list) { +@@ -342,6 +338,7 @@ static int msgctl_down(struct ipc_namespace *ns, int msqid, int cmd, + struct kern_ipc_perm *ipcp; + struct msqid64_ds uninitialized_var(msqid64); + struct msg_queue *msq; ++ WAKE_Q(wake_q); + int err; + + if (cmd == IPC_SET) { +@@ -389,7 +386,7 @@ static int msgctl_down(struct ipc_namespace *ns, int msqid, int cmd, + /* sleeping receivers might be excluded by + * stricter permissions. + */ +- expunge_all(msq, -EAGAIN); ++ expunge_all(msq, -EAGAIN, &wake_q); + /* sleeping senders might be able to send + * due to a larger queue size. + */ +@@ -402,6 +399,7 @@ static int msgctl_down(struct ipc_namespace *ns, int msqid, int cmd, + + out_unlock0: + ipc_unlock_object(&msq->q_perm); ++ wake_up_q(&wake_q); + out_unlock1: + rcu_read_unlock(); + out_up: +@@ -566,7 +564,8 @@ static int testmsg(struct msg_msg *msg, long type, int mode) + return 0; + } + +-static inline int pipelined_send(struct msg_queue *msq, struct msg_msg *msg) ++static inline int pipelined_send(struct msg_queue *msq, struct msg_msg *msg, ++ struct wake_q_head *wake_q) + { + struct msg_receiver *msr, *t; + +@@ -577,27 +576,13 @@ static inline int pipelined_send(struct msg_queue *msq, struct msg_msg *msg) + + list_del(&msr->r_list); + if (msr->r_maxsize < msg->m_ts) { +- /* initialize pipelined send ordering */ +- msr->r_msg = NULL; +- wake_up_process(msr->r_tsk); +- /* barrier (B) see barrier comment below */ +- smp_wmb(); ++ wake_q_add(wake_q, msr->r_tsk); + msr->r_msg = ERR_PTR(-E2BIG); + } else { +- msr->r_msg = NULL; + msq->q_lrpid = task_pid_vnr(msr->r_tsk); + msq->q_rtime = get_seconds(); +- wake_up_process(msr->r_tsk); +- /* +- * Ensure that the wakeup is visible before +- * setting r_msg, as the receiving can otherwise +- * exit - once r_msg is set, the receiver can +- * continue. See lockless receive part 1 and 2 +- * in do_msgrcv(). Barrier (B). +- */ +- smp_wmb(); ++ wake_q_add(wake_q, msr->r_tsk); + msr->r_msg = msg; +- + return 1; + } + } +@@ -613,6 +598,7 @@ long do_msgsnd(int msqid, long mtype, void __user *mtext, + struct msg_msg *msg; + int err; + struct ipc_namespace *ns; ++ WAKE_Q(wake_q); + + ns = current->nsproxy->ipc_ns; + +@@ -698,7 +684,7 @@ long do_msgsnd(int msqid, long mtype, void __user *mtext, + msq->q_lspid = task_tgid_vnr(current); + msq->q_stime = get_seconds(); + +- if (!pipelined_send(msq, msg)) { ++ if (!pipelined_send(msq, msg, &wake_q)) { + /* no one is waiting for this message, enqueue it */ + list_add_tail(&msg->m_list, &msq->q_messages); + msq->q_cbytes += msgsz; +@@ -712,6 +698,7 @@ long do_msgsnd(int msqid, long mtype, void __user *mtext, + + out_unlock0: + ipc_unlock_object(&msq->q_perm); ++ wake_up_q(&wake_q); + out_unlock1: + rcu_read_unlock(); + if (msg != NULL) +@@ -932,57 +919,25 @@ long do_msgrcv(int msqid, void __user *buf, size_t bufsz, long msgtyp, int msgfl + rcu_read_lock(); + + /* Lockless receive, part 2: +- * Wait until pipelined_send or expunge_all are outside of +- * wake_up_process(). There is a race with exit(), see +- * ipc/mqueue.c for the details. The correct serialization +- * ensures that a receiver cannot continue without the wakeup +- * being visibible _before_ setting r_msg: ++ * The work in pipelined_send() and expunge_all(): ++ * - Set pointer to message ++ * - Queue the receiver task for later wakeup ++ * - Wake up the process after the lock is dropped. + * +- * CPU 0 CPU 1 +- * <loop receiver> +- * smp_rmb(); (A) <-- pair -. <waker thread> +- * <load ->r_msg> | msr->r_msg = NULL; +- * | wake_up_process(); +- * <continue> `------> smp_wmb(); (B) +- * msr->r_msg = msg; +- * +- * Where (A) orders the message value read and where (B) orders +- * the write to the r_msg -- done in both pipelined_send and +- * expunge_all. ++ * Should the process wake up before this wakeup (due to a ++ * signal) it will either see the message and continue … + */ +- for (;;) { +- /* +- * Pairs with writer barrier in pipelined_send +- * or expunge_all. +- */ +- smp_rmb(); /* barrier (A) */ +- msg = (struct msg_msg *)msr_d.r_msg; +- if (msg) +- break; + +- /* +- * The cpu_relax() call is a compiler barrier +- * which forces everything in this loop to be +- * re-loaded. +- */ +- cpu_relax(); +- } +- +- /* Lockless receive, part 3: +- * If there is a message or an error then accept it without +- * locking. +- */ ++ msg = (struct msg_msg *)msr_d.r_msg; + if (msg != ERR_PTR(-EAGAIN)) + goto out_unlock1; + +- /* Lockless receive, part 3: +- * Acquire the queue spinlock. +- */ ++ /* ++ * … or see -EAGAIN, acquire the lock to check the message ++ * again. ++ */ + ipc_lock_object(&msq->q_perm); + +- /* Lockless receive, part 4: +- * Repeat test after acquiring the spinlock. +- */ + msg = (struct msg_msg *)msr_d.r_msg; + if (msg != ERR_PTR(-EAGAIN)) + goto out_unlock0; +diff --git a/ipc/sem.c b/ipc/sem.c +index 5e318c5f749d..ec9203971539 100644 +--- a/ipc/sem.c ++++ b/ipc/sem.c +@@ -712,6 +712,13 @@ static int perform_atomic_semop(struct sem_array *sma, struct sem_queue *q) + static void wake_up_sem_queue_prepare(struct list_head *pt, + struct sem_queue *q, int error) + { ++#ifdef CONFIG_PREEMPT_RT_BASE ++ struct task_struct *p = q->sleeper; ++ get_task_struct(p); ++ q->status = error; ++ wake_up_process(p); ++ put_task_struct(p); ++#else + if (list_empty(pt)) { + /* + * Hold preempt off so that we don't get preempted and have the +@@ -723,6 +730,7 @@ static void wake_up_sem_queue_prepare(struct list_head *pt, + q->pid = error; + + list_add_tail(&q->list, pt); ++#endif + } + + /** +@@ -736,6 +744,7 @@ static void wake_up_sem_queue_prepare(struct list_head *pt, + */ + static void wake_up_sem_queue_do(struct list_head *pt) + { ++#ifndef CONFIG_PREEMPT_RT_BASE + struct sem_queue *q, *t; + int did_something; + +@@ -748,6 +757,7 @@ static void wake_up_sem_queue_do(struct list_head *pt) + } + if (did_something) + preempt_enable(); ++#endif + } + + static void unlink_queue(struct sem_array *sma, struct sem_queue *q) +diff --git a/kernel/Kconfig.locks b/kernel/Kconfig.locks +index ebdb0043203a..b9e6aa7e5aa6 100644 +--- a/kernel/Kconfig.locks ++++ b/kernel/Kconfig.locks +@@ -225,11 +225,11 @@ config ARCH_SUPPORTS_ATOMIC_RMW + + config MUTEX_SPIN_ON_OWNER + def_bool y +- depends on SMP && !DEBUG_MUTEXES && ARCH_SUPPORTS_ATOMIC_RMW ++ depends on SMP && !DEBUG_MUTEXES && ARCH_SUPPORTS_ATOMIC_RMW && !PREEMPT_RT_FULL + + config RWSEM_SPIN_ON_OWNER + def_bool y +- depends on SMP && RWSEM_XCHGADD_ALGORITHM && ARCH_SUPPORTS_ATOMIC_RMW ++ depends on SMP && RWSEM_XCHGADD_ALGORITHM && ARCH_SUPPORTS_ATOMIC_RMW && !PREEMPT_RT_FULL + + config LOCK_SPIN_ON_OWNER + def_bool y +diff --git a/kernel/Kconfig.preempt b/kernel/Kconfig.preempt +index 3f9c97419f02..11dbe26a8279 100644 +--- a/kernel/Kconfig.preempt ++++ b/kernel/Kconfig.preempt +@@ -1,3 +1,16 @@ ++config PREEMPT ++ bool ++ select PREEMPT_COUNT ++ ++config PREEMPT_RT_BASE ++ bool ++ select PREEMPT ++ ++config HAVE_PREEMPT_LAZY ++ bool ++ ++config PREEMPT_LAZY ++ def_bool y if HAVE_PREEMPT_LAZY && PREEMPT_RT_FULL + + choice + prompt "Preemption Model" +@@ -33,9 +46,9 @@ config PREEMPT_VOLUNTARY + + Select this if you are building a kernel for a desktop system. + +-config PREEMPT ++config PREEMPT__LL + bool "Preemptible Kernel (Low-Latency Desktop)" +- select PREEMPT_COUNT ++ select PREEMPT + select UNINLINE_SPIN_UNLOCK if !ARCH_INLINE_SPIN_UNLOCK + help + This option reduces the latency of the kernel by making +@@ -52,6 +65,22 @@ config PREEMPT + embedded system with latency requirements in the milliseconds + range. + ++config PREEMPT_RTB ++ bool "Preemptible Kernel (Basic RT)" ++ select PREEMPT_RT_BASE ++ help ++ This option is basically the same as (Low-Latency Desktop) but ++ enables changes which are preliminary for the full preemptible ++ RT kernel. ++ ++config PREEMPT_RT_FULL ++ bool "Fully Preemptible Kernel (RT)" ++ depends on IRQ_FORCED_THREADING ++ select PREEMPT_RT_BASE ++ select PREEMPT_RCU ++ help ++ All and everything ++ + endchoice + + config PREEMPT_COUNT +diff --git a/kernel/Makefile b/kernel/Makefile +index e2ec54e2b952..bff8214bf5f6 100644 +--- a/kernel/Makefile ++++ b/kernel/Makefile +@@ -11,6 +11,13 @@ obj-y = fork.o exec_domain.o panic.o \ + notifier.o ksysfs.o cred.o reboot.o \ + async.o range.o smpboot.o + ++# Tracing may do some dangerous __builtin_return_address() operations ++# We know they are dangerous, we don't need gcc telling us that. ++ifdef CONFIG_USING_GET_LOCK_PARENT_IP ++FRAME_CFLAGS := $(call cc-disable-warning,frame-address) ++KBUILD_CFLAGS += $(FRAME_CFLAGS) ++endif ++ + obj-$(CONFIG_MULTIUSER) += groups.o + + ifdef CONFIG_FUNCTION_TRACER +diff --git a/kernel/cgroup.c b/kernel/cgroup.c +index d6b729beba49..11d61b2ca938 100644 +--- a/kernel/cgroup.c ++++ b/kernel/cgroup.c +@@ -5027,10 +5027,10 @@ static void css_free_rcu_fn(struct rcu_head *rcu_head) + queue_work(cgroup_destroy_wq, &css->destroy_work); + } + +-static void css_release_work_fn(struct work_struct *work) ++static void css_release_work_fn(struct swork_event *sev) + { + struct cgroup_subsys_state *css = +- container_of(work, struct cgroup_subsys_state, destroy_work); ++ container_of(sev, struct cgroup_subsys_state, destroy_swork); + struct cgroup_subsys *ss = css->ss; + struct cgroup *cgrp = css->cgroup; + +@@ -5071,8 +5071,8 @@ static void css_release(struct percpu_ref *ref) + struct cgroup_subsys_state *css = + container_of(ref, struct cgroup_subsys_state, refcnt); + +- INIT_WORK(&css->destroy_work, css_release_work_fn); +- queue_work(cgroup_destroy_wq, &css->destroy_work); ++ INIT_SWORK(&css->destroy_swork, css_release_work_fn); ++ swork_queue(&css->destroy_swork); + } + + static void init_and_link_css(struct cgroup_subsys_state *css, +@@ -5716,6 +5716,7 @@ static int __init cgroup_wq_init(void) + */ + cgroup_destroy_wq = alloc_workqueue("cgroup_destroy", 0, 1); + BUG_ON(!cgroup_destroy_wq); ++ BUG_ON(swork_get()); + + /* + * Used to destroy pidlists and separate to serve as flush domain. +diff --git a/kernel/cpu.c b/kernel/cpu.c +index 341bf80f80bd..b575429a8a00 100644 +--- a/kernel/cpu.c ++++ b/kernel/cpu.c +@@ -152,8 +152,8 @@ static struct { + #endif + } cpu_hotplug = { + .active_writer = NULL, +- .wq = __WAIT_QUEUE_HEAD_INITIALIZER(cpu_hotplug.wq), + .lock = __MUTEX_INITIALIZER(cpu_hotplug.lock), ++ .wq = __WAIT_QUEUE_HEAD_INITIALIZER(cpu_hotplug.wq), + #ifdef CONFIG_DEBUG_LOCK_ALLOC + .dep_map = {.name = "cpu_hotplug.lock" }, + #endif +@@ -166,6 +166,289 @@ static struct { + #define cpuhp_lock_acquire() lock_map_acquire(&cpu_hotplug.dep_map) + #define cpuhp_lock_release() lock_map_release(&cpu_hotplug.dep_map) + ++/** ++ * hotplug_pcp - per cpu hotplug descriptor ++ * @unplug: set when pin_current_cpu() needs to sync tasks ++ * @sync_tsk: the task that waits for tasks to finish pinned sections ++ * @refcount: counter of tasks in pinned sections ++ * @grab_lock: set when the tasks entering pinned sections should wait ++ * @synced: notifier for @sync_tsk to tell cpu_down it's finished ++ * @mutex: the mutex to make tasks wait (used when @grab_lock is true) ++ * @mutex_init: zero if the mutex hasn't been initialized yet. ++ * ++ * Although @unplug and @sync_tsk may point to the same task, the @unplug ++ * is used as a flag and still exists after @sync_tsk has exited and ++ * @sync_tsk set to NULL. ++ */ ++struct hotplug_pcp { ++ struct task_struct *unplug; ++ struct task_struct *sync_tsk; ++ int refcount; ++ int grab_lock; ++ struct completion synced; ++ struct completion unplug_wait; ++#ifdef CONFIG_PREEMPT_RT_FULL ++ /* ++ * Note, on PREEMPT_RT, the hotplug lock must save the state of ++ * the task, otherwise the mutex will cause the task to fail ++ * to sleep when required. (Because it's called from migrate_disable()) ++ * ++ * The spinlock_t on PREEMPT_RT is a mutex that saves the task's ++ * state. ++ */ ++ spinlock_t lock; ++#else ++ struct mutex mutex; ++#endif ++ int mutex_init; ++}; ++ ++#ifdef CONFIG_PREEMPT_RT_FULL ++# define hotplug_lock(hp) rt_spin_lock__no_mg(&(hp)->lock) ++# define hotplug_unlock(hp) rt_spin_unlock__no_mg(&(hp)->lock) ++#else ++# define hotplug_lock(hp) mutex_lock(&(hp)->mutex) ++# define hotplug_unlock(hp) mutex_unlock(&(hp)->mutex) ++#endif ++ ++static DEFINE_PER_CPU(struct hotplug_pcp, hotplug_pcp); ++ ++/** ++ * pin_current_cpu - Prevent the current cpu from being unplugged ++ * ++ * Lightweight version of get_online_cpus() to prevent cpu from being ++ * unplugged when code runs in a migration disabled region. ++ * ++ * Must be called with preemption disabled (preempt_count = 1)! ++ */ ++void pin_current_cpu(void) ++{ ++ struct hotplug_pcp *hp; ++ int force = 0; ++ ++retry: ++ hp = this_cpu_ptr(&hotplug_pcp); ++ ++ if (!hp->unplug || hp->refcount || force || preempt_count() > 1 || ++ hp->unplug == current) { ++ hp->refcount++; ++ return; ++ } ++ if (hp->grab_lock) { ++ preempt_enable(); ++ hotplug_lock(hp); ++ hotplug_unlock(hp); ++ } else { ++ preempt_enable(); ++ /* ++ * Try to push this task off of this CPU. ++ */ ++ if (!migrate_me()) { ++ preempt_disable(); ++ hp = this_cpu_ptr(&hotplug_pcp); ++ if (!hp->grab_lock) { ++ /* ++ * Just let it continue it's already pinned ++ * or about to sleep. ++ */ ++ force = 1; ++ goto retry; ++ } ++ preempt_enable(); ++ } ++ } ++ preempt_disable(); ++ goto retry; ++} ++ ++/** ++ * unpin_current_cpu - Allow unplug of current cpu ++ * ++ * Must be called with preemption or interrupts disabled! ++ */ ++void unpin_current_cpu(void) ++{ ++ struct hotplug_pcp *hp = this_cpu_ptr(&hotplug_pcp); ++ ++ WARN_ON(hp->refcount <= 0); ++ ++ /* This is safe. sync_unplug_thread is pinned to this cpu */ ++ if (!--hp->refcount && hp->unplug && hp->unplug != current) ++ wake_up_process(hp->unplug); ++} ++ ++static void wait_for_pinned_cpus(struct hotplug_pcp *hp) ++{ ++ set_current_state(TASK_UNINTERRUPTIBLE); ++ while (hp->refcount) { ++ schedule_preempt_disabled(); ++ set_current_state(TASK_UNINTERRUPTIBLE); ++ } ++} ++ ++static int sync_unplug_thread(void *data) ++{ ++ struct hotplug_pcp *hp = data; ++ ++ wait_for_completion(&hp->unplug_wait); ++ preempt_disable(); ++ hp->unplug = current; ++ wait_for_pinned_cpus(hp); ++ ++ /* ++ * This thread will synchronize the cpu_down() with threads ++ * that have pinned the CPU. When the pinned CPU count reaches ++ * zero, we inform the cpu_down code to continue to the next step. ++ */ ++ set_current_state(TASK_UNINTERRUPTIBLE); ++ preempt_enable(); ++ complete(&hp->synced); ++ ++ /* ++ * If all succeeds, the next step will need tasks to wait till ++ * the CPU is offline before continuing. To do this, the grab_lock ++ * is set and tasks going into pin_current_cpu() will block on the ++ * mutex. But we still need to wait for those that are already in ++ * pinned CPU sections. If the cpu_down() failed, the kthread_should_stop() ++ * will kick this thread out. ++ */ ++ while (!hp->grab_lock && !kthread_should_stop()) { ++ schedule(); ++ set_current_state(TASK_UNINTERRUPTIBLE); ++ } ++ ++ /* Make sure grab_lock is seen before we see a stale completion */ ++ smp_mb(); ++ ++ /* ++ * Now just before cpu_down() enters stop machine, we need to make ++ * sure all tasks that are in pinned CPU sections are out, and new ++ * tasks will now grab the lock, keeping them from entering pinned ++ * CPU sections. ++ */ ++ if (!kthread_should_stop()) { ++ preempt_disable(); ++ wait_for_pinned_cpus(hp); ++ preempt_enable(); ++ complete(&hp->synced); ++ } ++ ++ set_current_state(TASK_UNINTERRUPTIBLE); ++ while (!kthread_should_stop()) { ++ schedule(); ++ set_current_state(TASK_UNINTERRUPTIBLE); ++ } ++ set_current_state(TASK_RUNNING); ++ ++ /* ++ * Force this thread off this CPU as it's going down and ++ * we don't want any more work on this CPU. ++ */ ++ current->flags &= ~PF_NO_SETAFFINITY; ++ set_cpus_allowed_ptr(current, cpu_present_mask); ++ migrate_me(); ++ return 0; ++} ++ ++static void __cpu_unplug_sync(struct hotplug_pcp *hp) ++{ ++ wake_up_process(hp->sync_tsk); ++ wait_for_completion(&hp->synced); ++} ++ ++static void __cpu_unplug_wait(unsigned int cpu) ++{ ++ struct hotplug_pcp *hp = &per_cpu(hotplug_pcp, cpu); ++ ++ complete(&hp->unplug_wait); ++ wait_for_completion(&hp->synced); ++} ++ ++/* ++ * Start the sync_unplug_thread on the target cpu and wait for it to ++ * complete. ++ */ ++static int cpu_unplug_begin(unsigned int cpu) ++{ ++ struct hotplug_pcp *hp = &per_cpu(hotplug_pcp, cpu); ++ int err; ++ ++ /* Protected by cpu_hotplug.lock */ ++ if (!hp->mutex_init) { ++#ifdef CONFIG_PREEMPT_RT_FULL ++ spin_lock_init(&hp->lock); ++#else ++ mutex_init(&hp->mutex); ++#endif ++ hp->mutex_init = 1; ++ } ++ ++ /* Inform the scheduler to migrate tasks off this CPU */ ++ tell_sched_cpu_down_begin(cpu); ++ ++ init_completion(&hp->synced); ++ init_completion(&hp->unplug_wait); ++ ++ hp->sync_tsk = kthread_create(sync_unplug_thread, hp, "sync_unplug/%d", cpu); ++ if (IS_ERR(hp->sync_tsk)) { ++ err = PTR_ERR(hp->sync_tsk); ++ hp->sync_tsk = NULL; ++ return err; ++ } ++ kthread_bind(hp->sync_tsk, cpu); ++ ++ /* ++ * Wait for tasks to get out of the pinned sections, ++ * it's still OK if new tasks enter. Some CPU notifiers will ++ * wait for tasks that are going to enter these sections and ++ * we must not have them block. ++ */ ++ wake_up_process(hp->sync_tsk); ++ return 0; ++} ++ ++static void cpu_unplug_sync(unsigned int cpu) ++{ ++ struct hotplug_pcp *hp = &per_cpu(hotplug_pcp, cpu); ++ ++ init_completion(&hp->synced); ++ /* The completion needs to be initialzied before setting grab_lock */ ++ smp_wmb(); ++ ++ /* Grab the mutex before setting grab_lock */ ++ hotplug_lock(hp); ++ hp->grab_lock = 1; ++ ++ /* ++ * The CPU notifiers have been completed. ++ * Wait for tasks to get out of pinned CPU sections and have new ++ * tasks block until the CPU is completely down. ++ */ ++ __cpu_unplug_sync(hp); ++ ++ /* All done with the sync thread */ ++ kthread_stop(hp->sync_tsk); ++ hp->sync_tsk = NULL; ++} ++ ++static void cpu_unplug_done(unsigned int cpu) ++{ ++ struct hotplug_pcp *hp = &per_cpu(hotplug_pcp, cpu); ++ ++ hp->unplug = NULL; ++ /* Let all tasks know cpu unplug is finished before cleaning up */ ++ smp_wmb(); ++ ++ if (hp->sync_tsk) ++ kthread_stop(hp->sync_tsk); ++ ++ if (hp->grab_lock) { ++ hotplug_unlock(hp); ++ /* protected by cpu_hotplug.lock */ ++ hp->grab_lock = 0; ++ } ++ tell_sched_cpu_down_done(cpu); ++} + + void get_online_cpus(void) + { +@@ -710,10 +993,14 @@ static int takedown_cpu(unsigned int cpu) + struct cpuhp_cpu_state *st = per_cpu_ptr(&cpuhp_state, cpu); + int err; + ++ __cpu_unplug_wait(cpu); + /* Park the smpboot threads */ + kthread_park(per_cpu_ptr(&cpuhp_state, cpu)->thread); + smpboot_park_threads(cpu); + ++ /* Notifiers are done. Don't let any more tasks pin this CPU. */ ++ cpu_unplug_sync(cpu); ++ + /* + * Prevent irq alloc/free while the dying cpu reorganizes the + * interrupt affinities. +@@ -799,6 +1086,9 @@ static int __ref _cpu_down(unsigned int cpu, int tasks_frozen, + struct cpuhp_cpu_state *st = per_cpu_ptr(&cpuhp_state, cpu); + int prev_state, ret = 0; + bool hasdied = false; ++ int mycpu; ++ cpumask_var_t cpumask; ++ cpumask_var_t cpumask_org; + + if (num_online_cpus() == 1) + return -EBUSY; +@@ -806,7 +1096,34 @@ static int __ref _cpu_down(unsigned int cpu, int tasks_frozen, + if (!cpu_present(cpu)) + return -EINVAL; + ++ /* Move the downtaker off the unplug cpu */ ++ if (!alloc_cpumask_var(&cpumask, GFP_KERNEL)) ++ return -ENOMEM; ++ if (!alloc_cpumask_var(&cpumask_org, GFP_KERNEL)) { ++ free_cpumask_var(cpumask); ++ return -ENOMEM; ++ } ++ ++ cpumask_copy(cpumask_org, tsk_cpus_allowed(current)); ++ cpumask_andnot(cpumask, cpu_online_mask, cpumask_of(cpu)); ++ set_cpus_allowed_ptr(current, cpumask); ++ free_cpumask_var(cpumask); ++ migrate_disable(); ++ mycpu = smp_processor_id(); ++ if (mycpu == cpu) { ++ printk(KERN_ERR "Yuck! Still on unplug CPU\n!"); ++ migrate_enable(); ++ ret = -EBUSY; ++ goto restore_cpus; ++ } ++ ++ migrate_enable(); + cpu_hotplug_begin(); ++ ret = cpu_unplug_begin(cpu); ++ if (ret) { ++ printk("cpu_unplug_begin(%d) failed\n", cpu); ++ goto out_cancel; ++ } + + cpuhp_tasks_frozen = tasks_frozen; + +@@ -845,10 +1162,15 @@ static int __ref _cpu_down(unsigned int cpu, int tasks_frozen, + + hasdied = prev_state != st->state && st->state == CPUHP_OFFLINE; + out: ++ cpu_unplug_done(cpu); ++out_cancel: + cpu_hotplug_done(); + /* This post dead nonsense must die */ + if (!ret && hasdied) + cpu_notify_nofail(CPU_POST_DEAD, cpu); ++restore_cpus: ++ set_cpus_allowed_ptr(current, cpumask_org); ++ free_cpumask_var(cpumask_org); + return ret; + } + +diff --git a/kernel/debug/kdb/kdb_io.c b/kernel/debug/kdb/kdb_io.c +index fc1ef736253c..83c666537a7a 100644 +--- a/kernel/debug/kdb/kdb_io.c ++++ b/kernel/debug/kdb/kdb_io.c +@@ -554,7 +554,6 @@ int vkdb_printf(enum kdb_msgsrc src, const char *fmt, va_list ap) + int linecount; + int colcount; + int logging, saved_loglevel = 0; +- int saved_trap_printk; + int got_printf_lock = 0; + int retlen = 0; + int fnd, len; +@@ -565,8 +564,6 @@ int vkdb_printf(enum kdb_msgsrc src, const char *fmt, va_list ap) + unsigned long uninitialized_var(flags); + + preempt_disable(); +- saved_trap_printk = kdb_trap_printk; +- kdb_trap_printk = 0; + + /* Serialize kdb_printf if multiple cpus try to write at once. + * But if any cpu goes recursive in kdb, just print the output, +@@ -855,7 +852,6 @@ int vkdb_printf(enum kdb_msgsrc src, const char *fmt, va_list ap) + } else { + __release(kdb_printf_lock); + } +- kdb_trap_printk = saved_trap_printk; + preempt_enable(); + return retlen; + } +@@ -865,9 +861,11 @@ int kdb_printf(const char *fmt, ...) + va_list ap; + int r; + ++ kdb_trap_printk++; + va_start(ap, fmt); + r = vkdb_printf(KDB_MSGSRC_INTERNAL, fmt, ap); + va_end(ap); ++ kdb_trap_printk--; + + return r; + } +diff --git a/kernel/events/core.c b/kernel/events/core.c +index fc9bb2225291..bc2db7e1ae04 100644 +--- a/kernel/events/core.c ++++ b/kernel/events/core.c +@@ -1042,6 +1042,7 @@ static void __perf_mux_hrtimer_init(struct perf_cpu_context *cpuctx, int cpu) + raw_spin_lock_init(&cpuctx->hrtimer_lock); + hrtimer_init(timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS_PINNED); + timer->function = perf_mux_hrtimer_handler; ++ timer->irqsafe = 1; + } + + static int perf_mux_hrtimer_restart(struct perf_cpu_context *cpuctx) +@@ -8215,6 +8216,7 @@ static void perf_swevent_init_hrtimer(struct perf_event *event) + + hrtimer_init(&hwc->hrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); + hwc->hrtimer.function = perf_swevent_hrtimer; ++ hwc->hrtimer.irqsafe = 1; + + /* + * Since hrtimers have a fixed rate, we can do a static freq->period +diff --git a/kernel/exit.c b/kernel/exit.c +index 091a78be3b09..170b672bbb38 100644 +--- a/kernel/exit.c ++++ b/kernel/exit.c +@@ -143,7 +143,7 @@ static void __exit_signal(struct task_struct *tsk) + * Do this under ->siglock, we can race with another thread + * doing sigqueue_free() if we have SIGQUEUE_PREALLOC signals. + */ +- flush_sigqueue(&tsk->pending); ++ flush_task_sigqueue(tsk); + tsk->sighand = NULL; + spin_unlock(&sighand->siglock); + +diff --git a/kernel/fork.c b/kernel/fork.c +index beb31725f7e2..e398cb9e62fa 100644 +--- a/kernel/fork.c ++++ b/kernel/fork.c +@@ -251,7 +251,9 @@ static inline void put_signal_struct(struct signal_struct *sig) + if (atomic_dec_and_test(&sig->sigcnt)) + free_signal_struct(sig); + } +- ++#ifdef CONFIG_PREEMPT_RT_BASE ++static ++#endif + void __put_task_struct(struct task_struct *tsk) + { + WARN_ON(!tsk->exit_state); +@@ -268,7 +270,18 @@ void __put_task_struct(struct task_struct *tsk) + if (!profile_handoff_task(tsk)) + free_task(tsk); + } ++#ifndef CONFIG_PREEMPT_RT_BASE + EXPORT_SYMBOL_GPL(__put_task_struct); ++#else ++void __put_task_struct_cb(struct rcu_head *rhp) ++{ ++ struct task_struct *tsk = container_of(rhp, struct task_struct, put_rcu); ++ ++ __put_task_struct(tsk); ++ ++} ++EXPORT_SYMBOL_GPL(__put_task_struct_cb); ++#endif + + void __init __weak arch_task_cache_init(void) { } + +@@ -702,6 +715,19 @@ void __mmdrop(struct mm_struct *mm) + } + EXPORT_SYMBOL_GPL(__mmdrop); + ++#ifdef CONFIG_PREEMPT_RT_BASE ++/* ++ * RCU callback for delayed mm drop. Not strictly rcu, but we don't ++ * want another facility to make this work. ++ */ ++void __mmdrop_delayed(struct rcu_head *rhp) ++{ ++ struct mm_struct *mm = container_of(rhp, struct mm_struct, delayed_drop); ++ ++ __mmdrop(mm); ++} ++#endif ++ + static inline void __mmput(struct mm_struct *mm) + { + VM_BUG_ON(atomic_read(&mm->mm_users)); +@@ -1274,6 +1300,9 @@ static void rt_mutex_init_task(struct task_struct *p) + */ + static void posix_cpu_timers_init(struct task_struct *tsk) + { ++#ifdef CONFIG_PREEMPT_RT_BASE ++ tsk->posix_timer_list = NULL; ++#endif + tsk->cputime_expires.prof_exp = 0; + tsk->cputime_expires.virt_exp = 0; + tsk->cputime_expires.sched_exp = 0; +@@ -1399,6 +1428,7 @@ static struct task_struct *copy_process(unsigned long clone_flags, + spin_lock_init(&p->alloc_lock); + + init_sigpending(&p->pending); ++ p->sigqueue_cache = NULL; + + p->utime = p->stime = p->gtime = 0; + p->utimescaled = p->stimescaled = 0; +diff --git a/kernel/futex.c b/kernel/futex.c +index 46cb3a301bc1..6de82b959729 100644 +--- a/kernel/futex.c ++++ b/kernel/futex.c +@@ -895,7 +895,9 @@ void exit_pi_state_list(struct task_struct *curr) + * task still owns the PI-state: + */ + if (head->next != next) { ++ raw_spin_unlock_irq(&curr->pi_lock); + spin_unlock(&hb->lock); ++ raw_spin_lock_irq(&curr->pi_lock); + continue; + } + +@@ -1290,6 +1292,7 @@ static int wake_futex_pi(u32 __user *uaddr, u32 uval, struct futex_q *this, + struct futex_pi_state *pi_state = this->pi_state; + u32 uninitialized_var(curval), newval; + WAKE_Q(wake_q); ++ WAKE_Q(wake_sleeper_q); + bool deboost; + int ret = 0; + +@@ -1356,7 +1359,8 @@ static int wake_futex_pi(u32 __user *uaddr, u32 uval, struct futex_q *this, + + raw_spin_unlock_irq(&pi_state->pi_mutex.wait_lock); + +- deboost = rt_mutex_futex_unlock(&pi_state->pi_mutex, &wake_q); ++ deboost = rt_mutex_futex_unlock(&pi_state->pi_mutex, &wake_q, ++ &wake_sleeper_q); + + /* + * First unlock HB so the waiter does not spin on it once he got woken +@@ -1364,8 +1368,9 @@ static int wake_futex_pi(u32 __user *uaddr, u32 uval, struct futex_q *this, + * deboost first (and lose our higher priority), then the task might get + * scheduled away before the wake up can take place. + */ +- spin_unlock(&hb->lock); ++ deboost |= spin_unlock_no_deboost(&hb->lock); + wake_up_q(&wake_q); ++ wake_up_q_sleeper(&wake_sleeper_q); + if (deboost) + rt_mutex_adjust_prio(current); + +@@ -1915,6 +1920,16 @@ static int futex_requeue(u32 __user *uaddr1, unsigned int flags, + requeue_pi_wake_futex(this, &key2, hb2); + drop_count++; + continue; ++ } else if (ret == -EAGAIN) { ++ /* ++ * Waiter was woken by timeout or ++ * signal and has set pi_blocked_on to ++ * PI_WAKEUP_INPROGRESS before we ++ * tried to enqueue it on the rtmutex. ++ */ ++ this->pi_state = NULL; ++ put_pi_state(pi_state); ++ continue; + } else if (ret) { + /* + * rt_mutex_start_proxy_lock() detected a +@@ -2805,7 +2820,7 @@ static int futex_wait_requeue_pi(u32 __user *uaddr, unsigned int flags, + struct hrtimer_sleeper timeout, *to = NULL; + struct rt_mutex_waiter rt_waiter; + struct rt_mutex *pi_mutex = NULL; +- struct futex_hash_bucket *hb; ++ struct futex_hash_bucket *hb, *hb2; + union futex_key key2 = FUTEX_KEY_INIT; + struct futex_q q = futex_q_init; + int res, ret; +@@ -2830,10 +2845,7 @@ static int futex_wait_requeue_pi(u32 __user *uaddr, unsigned int flags, + * The waiter is allocated on our stack, manipulated by the requeue + * code while we sleep on uaddr. + */ +- debug_rt_mutex_init_waiter(&rt_waiter); +- RB_CLEAR_NODE(&rt_waiter.pi_tree_entry); +- RB_CLEAR_NODE(&rt_waiter.tree_entry); +- rt_waiter.task = NULL; ++ rt_mutex_init_waiter(&rt_waiter, false); + + ret = get_futex_key(uaddr2, flags & FLAGS_SHARED, &key2, VERIFY_WRITE); + if (unlikely(ret != 0)) +@@ -2864,20 +2876,55 @@ static int futex_wait_requeue_pi(u32 __user *uaddr, unsigned int flags, + /* Queue the futex_q, drop the hb lock, wait for wakeup. */ + futex_wait_queue_me(hb, &q, to); + +- spin_lock(&hb->lock); +- ret = handle_early_requeue_pi_wakeup(hb, &q, &key2, to); +- spin_unlock(&hb->lock); +- if (ret) +- goto out_put_keys; ++ /* ++ * On RT we must avoid races with requeue and trying to block ++ * on two mutexes (hb->lock and uaddr2's rtmutex) by ++ * serializing access to pi_blocked_on with pi_lock. ++ */ ++ raw_spin_lock_irq(¤t->pi_lock); ++ if (current->pi_blocked_on) { ++ /* ++ * We have been requeued or are in the process of ++ * being requeued. ++ */ ++ raw_spin_unlock_irq(¤t->pi_lock); ++ } else { ++ /* ++ * Setting pi_blocked_on to PI_WAKEUP_INPROGRESS ++ * prevents a concurrent requeue from moving us to the ++ * uaddr2 rtmutex. After that we can safely acquire ++ * (and possibly block on) hb->lock. ++ */ ++ current->pi_blocked_on = PI_WAKEUP_INPROGRESS; ++ raw_spin_unlock_irq(¤t->pi_lock); ++ ++ spin_lock(&hb->lock); ++ ++ /* ++ * Clean up pi_blocked_on. We might leak it otherwise ++ * when we succeeded with the hb->lock in the fast ++ * path. ++ */ ++ raw_spin_lock_irq(¤t->pi_lock); ++ current->pi_blocked_on = NULL; ++ raw_spin_unlock_irq(¤t->pi_lock); ++ ++ ret = handle_early_requeue_pi_wakeup(hb, &q, &key2, to); ++ spin_unlock(&hb->lock); ++ if (ret) ++ goto out_put_keys; ++ } + + /* +- * In order for us to be here, we know our q.key == key2, and since +- * we took the hb->lock above, we also know that futex_requeue() has +- * completed and we no longer have to concern ourselves with a wakeup +- * race with the atomic proxy lock acquisition by the requeue code. The +- * futex_requeue dropped our key1 reference and incremented our key2 +- * reference count. ++ * In order to be here, we have either been requeued, are in ++ * the process of being requeued, or requeue successfully ++ * acquired uaddr2 on our behalf. If pi_blocked_on was ++ * non-null above, we may be racing with a requeue. Do not ++ * rely on q->lock_ptr to be hb2->lock until after blocking on ++ * hb->lock or hb2->lock. The futex_requeue dropped our key1 ++ * reference and incremented our key2 reference count. + */ ++ hb2 = hash_futex(&key2); + + /* Check if the requeue code acquired the second futex for us. */ + if (!q.rt_waiter) { +@@ -2886,14 +2933,15 @@ static int futex_wait_requeue_pi(u32 __user *uaddr, unsigned int flags, + * did a lock-steal - fix up the PI-state in that case. + */ + if (q.pi_state && (q.pi_state->owner != current)) { +- spin_lock(q.lock_ptr); ++ spin_lock(&hb2->lock); ++ BUG_ON(&hb2->lock != q.lock_ptr); + ret = fixup_pi_state_owner(uaddr2, &q, current); + /* + * Drop the reference to the pi state which + * the requeue_pi() code acquired for us. + */ + put_pi_state(q.pi_state); +- spin_unlock(q.lock_ptr); ++ spin_unlock(&hb2->lock); + } + } else { + /* +@@ -2906,7 +2954,8 @@ static int futex_wait_requeue_pi(u32 __user *uaddr, unsigned int flags, + ret = rt_mutex_finish_proxy_lock(pi_mutex, to, &rt_waiter); + debug_rt_mutex_free_waiter(&rt_waiter); + +- spin_lock(q.lock_ptr); ++ spin_lock(&hb2->lock); ++ BUG_ON(&hb2->lock != q.lock_ptr); + /* + * Fixup the pi_state owner and possibly acquire the lock if we + * haven't already. +diff --git a/kernel/irq/handle.c b/kernel/irq/handle.c +index d3f24905852c..f87aa8fdcc51 100644 +--- a/kernel/irq/handle.c ++++ b/kernel/irq/handle.c +@@ -181,10 +181,16 @@ irqreturn_t handle_irq_event_percpu(struct irq_desc *desc) + { + irqreturn_t retval; + unsigned int flags = 0; ++ struct pt_regs *regs = get_irq_regs(); ++ u64 ip = regs ? instruction_pointer(regs) : 0; + + retval = __handle_irq_event_percpu(desc, &flags); + +- add_interrupt_randomness(desc->irq_data.irq, flags); ++#ifdef CONFIG_PREEMPT_RT_FULL ++ desc->random_ip = ip; ++#else ++ add_interrupt_randomness(desc->irq_data.irq, flags, ip); ++#endif + + if (!noirqdebug) + note_interrupt(desc, retval); +diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c +index 9530fcd27704..fadf8f848299 100644 +--- a/kernel/irq/manage.c ++++ b/kernel/irq/manage.c +@@ -22,6 +22,7 @@ + #include "internals.h" + + #ifdef CONFIG_IRQ_FORCED_THREADING ++# ifndef CONFIG_PREEMPT_RT_BASE + __read_mostly bool force_irqthreads; + + static int __init setup_forced_irqthreads(char *arg) +@@ -30,6 +31,7 @@ static int __init setup_forced_irqthreads(char *arg) + return 0; + } + early_param("threadirqs", setup_forced_irqthreads); ++# endif + #endif + + static void __synchronize_hardirq(struct irq_desc *desc) +@@ -233,7 +235,12 @@ int irq_set_affinity_locked(struct irq_data *data, const struct cpumask *mask, + + if (desc->affinity_notify) { + kref_get(&desc->affinity_notify->kref); ++ ++#ifdef CONFIG_PREEMPT_RT_BASE ++ swork_queue(&desc->affinity_notify->swork); ++#else + schedule_work(&desc->affinity_notify->work); ++#endif + } + irqd_set(data, IRQD_AFFINITY_SET); + +@@ -271,10 +278,8 @@ int irq_set_affinity_hint(unsigned int irq, const struct cpumask *m) + } + EXPORT_SYMBOL_GPL(irq_set_affinity_hint); + +-static void irq_affinity_notify(struct work_struct *work) ++static void _irq_affinity_notify(struct irq_affinity_notify *notify) + { +- struct irq_affinity_notify *notify = +- container_of(work, struct irq_affinity_notify, work); + struct irq_desc *desc = irq_to_desc(notify->irq); + cpumask_var_t cpumask; + unsigned long flags; +@@ -296,6 +301,35 @@ static void irq_affinity_notify(struct work_struct *work) + kref_put(¬ify->kref, notify->release); + } + ++#ifdef CONFIG_PREEMPT_RT_BASE ++static void init_helper_thread(void) ++{ ++ static int init_sworker_once; ++ ++ if (init_sworker_once) ++ return; ++ if (WARN_ON(swork_get())) ++ return; ++ init_sworker_once = 1; ++} ++ ++static void irq_affinity_notify(struct swork_event *swork) ++{ ++ struct irq_affinity_notify *notify = ++ container_of(swork, struct irq_affinity_notify, swork); ++ _irq_affinity_notify(notify); ++} ++ ++#else ++ ++static void irq_affinity_notify(struct work_struct *work) ++{ ++ struct irq_affinity_notify *notify = ++ container_of(work, struct irq_affinity_notify, work); ++ _irq_affinity_notify(notify); ++} ++#endif ++ + /** + * irq_set_affinity_notifier - control notification of IRQ affinity changes + * @irq: Interrupt for which to enable/disable notification +@@ -324,7 +358,12 @@ irq_set_affinity_notifier(unsigned int irq, struct irq_affinity_notify *notify) + if (notify) { + notify->irq = irq; + kref_init(¬ify->kref); ++#ifdef CONFIG_PREEMPT_RT_BASE ++ INIT_SWORK(¬ify->swork, irq_affinity_notify); ++ init_helper_thread(); ++#else + INIT_WORK(¬ify->work, irq_affinity_notify); ++#endif + } + + raw_spin_lock_irqsave(&desc->lock, flags); +@@ -879,7 +918,15 @@ irq_forced_thread_fn(struct irq_desc *desc, struct irqaction *action) + local_bh_disable(); + ret = action->thread_fn(action->irq, action->dev_id); + irq_finalize_oneshot(desc, action); +- local_bh_enable(); ++ /* ++ * Interrupts which have real time requirements can be set up ++ * to avoid softirq processing in the thread handler. This is ++ * safe as these interrupts do not raise soft interrupts. ++ */ ++ if (irq_settings_no_softirq_call(desc)) ++ _local_bh_enable(); ++ else ++ local_bh_enable(); + return ret; + } + +@@ -976,6 +1023,12 @@ static int irq_thread(void *data) + if (action_ret == IRQ_WAKE_THREAD) + irq_wake_secondary(desc, action); + ++#ifdef CONFIG_PREEMPT_RT_FULL ++ migrate_disable(); ++ add_interrupt_randomness(action->irq, 0, ++ desc->random_ip ^ (unsigned long) action); ++ migrate_enable(); ++#endif + wake_threads_waitq(desc); + } + +@@ -1336,6 +1389,9 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new) + irqd_set(&desc->irq_data, IRQD_NO_BALANCING); + } + ++ if (new->flags & IRQF_NO_SOFTIRQ_CALL) ++ irq_settings_set_no_softirq_call(desc); ++ + /* Set default affinity mask once everything is setup */ + setup_affinity(desc, mask); + +@@ -2061,7 +2117,7 @@ EXPORT_SYMBOL_GPL(irq_get_irqchip_state); + * This call sets the internal irqchip state of an interrupt, + * depending on the value of @which. + * +- * This function should be called with preemption disabled if the ++ * This function should be called with migration disabled if the + * interrupt controller has per-cpu registers. + */ + int irq_set_irqchip_state(unsigned int irq, enum irqchip_irq_state which, +diff --git a/kernel/irq/settings.h b/kernel/irq/settings.h +index 320579d89091..2df2d4445b1e 100644 +--- a/kernel/irq/settings.h ++++ b/kernel/irq/settings.h +@@ -16,6 +16,7 @@ enum { + _IRQ_PER_CPU_DEVID = IRQ_PER_CPU_DEVID, + _IRQ_IS_POLLED = IRQ_IS_POLLED, + _IRQ_DISABLE_UNLAZY = IRQ_DISABLE_UNLAZY, ++ _IRQ_NO_SOFTIRQ_CALL = IRQ_NO_SOFTIRQ_CALL, + _IRQF_MODIFY_MASK = IRQF_MODIFY_MASK, + }; + +@@ -30,6 +31,7 @@ enum { + #define IRQ_PER_CPU_DEVID GOT_YOU_MORON + #define IRQ_IS_POLLED GOT_YOU_MORON + #define IRQ_DISABLE_UNLAZY GOT_YOU_MORON ++#define IRQ_NO_SOFTIRQ_CALL GOT_YOU_MORON + #undef IRQF_MODIFY_MASK + #define IRQF_MODIFY_MASK GOT_YOU_MORON + +@@ -40,6 +42,16 @@ irq_settings_clr_and_set(struct irq_desc *desc, u32 clr, u32 set) + desc->status_use_accessors |= (set & _IRQF_MODIFY_MASK); + } + ++static inline bool irq_settings_no_softirq_call(struct irq_desc *desc) ++{ ++ return desc->status_use_accessors & _IRQ_NO_SOFTIRQ_CALL; ++} ++ ++static inline void irq_settings_set_no_softirq_call(struct irq_desc *desc) ++{ ++ desc->status_use_accessors |= _IRQ_NO_SOFTIRQ_CALL; ++} ++ + static inline bool irq_settings_is_per_cpu(struct irq_desc *desc) + { + return desc->status_use_accessors & _IRQ_PER_CPU; +diff --git a/kernel/irq/spurious.c b/kernel/irq/spurious.c +index 5707f97a3e6a..73f38dc7a7fb 100644 +--- a/kernel/irq/spurious.c ++++ b/kernel/irq/spurious.c +@@ -442,6 +442,10 @@ MODULE_PARM_DESC(noirqdebug, "Disable irq lockup detection when true"); + + static int __init irqfixup_setup(char *str) + { ++#ifdef CONFIG_PREEMPT_RT_BASE ++ pr_warn("irqfixup boot option not supported w/ CONFIG_PREEMPT_RT_BASE\n"); ++ return 1; ++#endif + irqfixup = 1; + printk(KERN_WARNING "Misrouted IRQ fixup support enabled.\n"); + printk(KERN_WARNING "This may impact system performance.\n"); +@@ -454,6 +458,10 @@ module_param(irqfixup, int, 0644); + + static int __init irqpoll_setup(char *str) + { ++#ifdef CONFIG_PREEMPT_RT_BASE ++ pr_warn("irqpoll boot option not supported w/ CONFIG_PREEMPT_RT_BASE\n"); ++ return 1; ++#endif + irqfixup = 2; + printk(KERN_WARNING "Misrouted IRQ fixup and polling support " + "enabled\n"); +diff --git a/kernel/irq_work.c b/kernel/irq_work.c +index bcf107ce0854..2899ba0d23d1 100644 +--- a/kernel/irq_work.c ++++ b/kernel/irq_work.c +@@ -17,6 +17,7 @@ + #include <linux/cpu.h> + #include <linux/notifier.h> + #include <linux/smp.h> ++#include <linux/interrupt.h> + #include <asm/processor.h> + + +@@ -65,6 +66,8 @@ void __weak arch_irq_work_raise(void) + */ + bool irq_work_queue_on(struct irq_work *work, int cpu) + { ++ struct llist_head *list; ++ + /* All work should have been flushed before going offline */ + WARN_ON_ONCE(cpu_is_offline(cpu)); + +@@ -75,7 +78,12 @@ bool irq_work_queue_on(struct irq_work *work, int cpu) + if (!irq_work_claim(work)) + return false; + +- if (llist_add(&work->llnode, &per_cpu(raised_list, cpu))) ++ if (IS_ENABLED(CONFIG_PREEMPT_RT_FULL) && !(work->flags & IRQ_WORK_HARD_IRQ)) ++ list = &per_cpu(lazy_list, cpu); ++ else ++ list = &per_cpu(raised_list, cpu); ++ ++ if (llist_add(&work->llnode, list)) + arch_send_call_function_single_ipi(cpu); + + return true; +@@ -86,6 +94,9 @@ EXPORT_SYMBOL_GPL(irq_work_queue_on); + /* Enqueue the irq work @work on the current CPU */ + bool irq_work_queue(struct irq_work *work) + { ++ struct llist_head *list; ++ bool lazy_work, realtime = IS_ENABLED(CONFIG_PREEMPT_RT_FULL); ++ + /* Only queue if not already pending */ + if (!irq_work_claim(work)) + return false; +@@ -93,13 +104,15 @@ bool irq_work_queue(struct irq_work *work) + /* Queue the entry and raise the IPI if needed. */ + preempt_disable(); + +- /* If the work is "lazy", handle it from next tick if any */ +- if (work->flags & IRQ_WORK_LAZY) { +- if (llist_add(&work->llnode, this_cpu_ptr(&lazy_list)) && +- tick_nohz_tick_stopped()) +- arch_irq_work_raise(); +- } else { +- if (llist_add(&work->llnode, this_cpu_ptr(&raised_list))) ++ lazy_work = work->flags & IRQ_WORK_LAZY; ++ ++ if (lazy_work || (realtime && !(work->flags & IRQ_WORK_HARD_IRQ))) ++ list = this_cpu_ptr(&lazy_list); ++ else ++ list = this_cpu_ptr(&raised_list); ++ ++ if (llist_add(&work->llnode, list)) { ++ if (!lazy_work || tick_nohz_tick_stopped()) + arch_irq_work_raise(); + } + +@@ -116,9 +129,8 @@ bool irq_work_needs_cpu(void) + raised = this_cpu_ptr(&raised_list); + lazy = this_cpu_ptr(&lazy_list); + +- if (llist_empty(raised) || arch_irq_work_has_interrupt()) +- if (llist_empty(lazy)) +- return false; ++ if (llist_empty(raised) && llist_empty(lazy)) ++ return false; + + /* All work should have been flushed before going offline */ + WARN_ON_ONCE(cpu_is_offline(smp_processor_id())); +@@ -132,7 +144,7 @@ static void irq_work_run_list(struct llist_head *list) + struct irq_work *work; + struct llist_node *llnode; + +- BUG_ON(!irqs_disabled()); ++ BUG_ON_NONRT(!irqs_disabled()); + + if (llist_empty(list)) + return; +@@ -169,7 +181,16 @@ static void irq_work_run_list(struct llist_head *list) + void irq_work_run(void) + { + irq_work_run_list(this_cpu_ptr(&raised_list)); +- irq_work_run_list(this_cpu_ptr(&lazy_list)); ++ if (IS_ENABLED(CONFIG_PREEMPT_RT_FULL)) { ++ /* ++ * NOTE: we raise softirq via IPI for safety, ++ * and execute in irq_work_tick() to move the ++ * overhead from hard to soft irq context. ++ */ ++ if (!llist_empty(this_cpu_ptr(&lazy_list))) ++ raise_softirq(TIMER_SOFTIRQ); ++ } else ++ irq_work_run_list(this_cpu_ptr(&lazy_list)); + } + EXPORT_SYMBOL_GPL(irq_work_run); + +@@ -179,8 +200,17 @@ void irq_work_tick(void) + + if (!llist_empty(raised) && !arch_irq_work_has_interrupt()) + irq_work_run_list(raised); ++ ++ if (!IS_ENABLED(CONFIG_PREEMPT_RT_FULL)) ++ irq_work_run_list(this_cpu_ptr(&lazy_list)); ++} ++ ++#if defined(CONFIG_IRQ_WORK) && defined(CONFIG_PREEMPT_RT_FULL) ++void irq_work_tick_soft(void) ++{ + irq_work_run_list(this_cpu_ptr(&lazy_list)); + } ++#endif + + /* + * Synchronize against the irq_work @entry, ensures the entry is not +diff --git a/kernel/ksysfs.c b/kernel/ksysfs.c +index ee1bc1bb8feb..ddef07958840 100644 +--- a/kernel/ksysfs.c ++++ b/kernel/ksysfs.c +@@ -136,6 +136,15 @@ KERNEL_ATTR_RO(vmcoreinfo); + + #endif /* CONFIG_KEXEC_CORE */ + ++#if defined(CONFIG_PREEMPT_RT_FULL) ++static ssize_t realtime_show(struct kobject *kobj, ++ struct kobj_attribute *attr, char *buf) ++{ ++ return sprintf(buf, "%d\n", 1); ++} ++KERNEL_ATTR_RO(realtime); ++#endif ++ + /* whether file capabilities are enabled */ + static ssize_t fscaps_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +@@ -225,6 +234,9 @@ static struct attribute * kernel_attrs[] = { + &rcu_expedited_attr.attr, + &rcu_normal_attr.attr, + #endif ++#ifdef CONFIG_PREEMPT_RT_FULL ++ &realtime_attr.attr, ++#endif + NULL + }; + +diff --git a/kernel/locking/Makefile b/kernel/locking/Makefile +index 31322a4275cd..c6bba9299d8b 100644 +--- a/kernel/locking/Makefile ++++ b/kernel/locking/Makefile +@@ -2,7 +2,7 @@ + # and is generally not a function of system call inputs. + KCOV_INSTRUMENT := n + +-obj-y += mutex.o semaphore.o rwsem.o percpu-rwsem.o ++obj-y += semaphore.o percpu-rwsem.o + + ifdef CONFIG_FUNCTION_TRACER + CFLAGS_REMOVE_lockdep.o = $(CC_FLAGS_FTRACE) +@@ -11,7 +11,11 @@ CFLAGS_REMOVE_mutex-debug.o = $(CC_FLAGS_FTRACE) + CFLAGS_REMOVE_rtmutex-debug.o = $(CC_FLAGS_FTRACE) + endif + ++ifneq ($(CONFIG_PREEMPT_RT_FULL),y) ++obj-y += mutex.o + obj-$(CONFIG_DEBUG_MUTEXES) += mutex-debug.o ++obj-y += rwsem.o ++endif + obj-$(CONFIG_LOCKDEP) += lockdep.o + ifeq ($(CONFIG_PROC_FS),y) + obj-$(CONFIG_LOCKDEP) += lockdep_proc.o +@@ -25,7 +29,10 @@ obj-$(CONFIG_RT_MUTEXES) += rtmutex.o + obj-$(CONFIG_DEBUG_RT_MUTEXES) += rtmutex-debug.o + obj-$(CONFIG_DEBUG_SPINLOCK) += spinlock.o + obj-$(CONFIG_DEBUG_SPINLOCK) += spinlock_debug.o ++ifneq ($(CONFIG_PREEMPT_RT_FULL),y) + obj-$(CONFIG_RWSEM_GENERIC_SPINLOCK) += rwsem-spinlock.o + obj-$(CONFIG_RWSEM_XCHGADD_ALGORITHM) += rwsem-xadd.o ++endif ++obj-$(CONFIG_PREEMPT_RT_FULL) += rt.o + obj-$(CONFIG_QUEUED_RWLOCKS) += qrwlock.o + obj-$(CONFIG_LOCK_TORTURE_TEST) += locktorture.o +diff --git a/kernel/locking/lglock.c b/kernel/locking/lglock.c +index 951cfcd10b4a..57e0ea72c28a 100644 +--- a/kernel/locking/lglock.c ++++ b/kernel/locking/lglock.c +@@ -4,6 +4,15 @@ + #include <linux/cpu.h> + #include <linux/string.h> + ++#ifndef CONFIG_PREEMPT_RT_FULL ++# define lg_lock_ptr arch_spinlock_t ++# define lg_do_lock(l) arch_spin_lock(l) ++# define lg_do_unlock(l) arch_spin_unlock(l) ++#else ++# define lg_lock_ptr struct rt_mutex ++# define lg_do_lock(l) __rt_spin_lock__no_mg(l) ++# define lg_do_unlock(l) __rt_spin_unlock(l) ++#endif + /* + * Note there is no uninit, so lglocks cannot be defined in + * modules (but it's fine to use them from there) +@@ -12,51 +21,60 @@ + + void lg_lock_init(struct lglock *lg, char *name) + { ++#ifdef CONFIG_PREEMPT_RT_FULL ++ int i; ++ ++ for_each_possible_cpu(i) { ++ struct rt_mutex *lock = per_cpu_ptr(lg->lock, i); ++ ++ rt_mutex_init(lock); ++ } ++#endif + LOCKDEP_INIT_MAP(&lg->lock_dep_map, name, &lg->lock_key, 0); + } + EXPORT_SYMBOL(lg_lock_init); + + void lg_local_lock(struct lglock *lg) + { +- arch_spinlock_t *lock; ++ lg_lock_ptr *lock; + +- preempt_disable(); ++ migrate_disable(); + lock_acquire_shared(&lg->lock_dep_map, 0, 0, NULL, _RET_IP_); + lock = this_cpu_ptr(lg->lock); +- arch_spin_lock(lock); ++ lg_do_lock(lock); + } + EXPORT_SYMBOL(lg_local_lock); + + void lg_local_unlock(struct lglock *lg) + { +- arch_spinlock_t *lock; ++ lg_lock_ptr *lock; + + lock_release(&lg->lock_dep_map, 1, _RET_IP_); + lock = this_cpu_ptr(lg->lock); +- arch_spin_unlock(lock); +- preempt_enable(); ++ lg_do_unlock(lock); ++ migrate_enable(); + } + EXPORT_SYMBOL(lg_local_unlock); + + void lg_local_lock_cpu(struct lglock *lg, int cpu) + { +- arch_spinlock_t *lock; ++ lg_lock_ptr *lock; + +- preempt_disable(); ++ preempt_disable_nort(); + lock_acquire_shared(&lg->lock_dep_map, 0, 0, NULL, _RET_IP_); + lock = per_cpu_ptr(lg->lock, cpu); +- arch_spin_lock(lock); ++ lg_do_lock(lock); + } + EXPORT_SYMBOL(lg_local_lock_cpu); + + void lg_local_unlock_cpu(struct lglock *lg, int cpu) + { +- arch_spinlock_t *lock; ++ lg_lock_ptr *lock; + + lock_release(&lg->lock_dep_map, 1, _RET_IP_); + lock = per_cpu_ptr(lg->lock, cpu); +- arch_spin_unlock(lock); +- preempt_enable(); ++ lg_do_unlock(lock); ++ preempt_enable_nort(); + } + EXPORT_SYMBOL(lg_local_unlock_cpu); + +@@ -68,30 +86,30 @@ void lg_double_lock(struct lglock *lg, int cpu1, int cpu2) + if (cpu2 < cpu1) + swap(cpu1, cpu2); + +- preempt_disable(); ++ preempt_disable_nort(); + lock_acquire_shared(&lg->lock_dep_map, 0, 0, NULL, _RET_IP_); +- arch_spin_lock(per_cpu_ptr(lg->lock, cpu1)); +- arch_spin_lock(per_cpu_ptr(lg->lock, cpu2)); ++ lg_do_lock(per_cpu_ptr(lg->lock, cpu1)); ++ lg_do_lock(per_cpu_ptr(lg->lock, cpu2)); + } + + void lg_double_unlock(struct lglock *lg, int cpu1, int cpu2) + { + lock_release(&lg->lock_dep_map, 1, _RET_IP_); +- arch_spin_unlock(per_cpu_ptr(lg->lock, cpu1)); +- arch_spin_unlock(per_cpu_ptr(lg->lock, cpu2)); +- preempt_enable(); ++ lg_do_unlock(per_cpu_ptr(lg->lock, cpu1)); ++ lg_do_unlock(per_cpu_ptr(lg->lock, cpu2)); ++ preempt_enable_nort(); + } + + void lg_global_lock(struct lglock *lg) + { + int i; + +- preempt_disable(); ++ preempt_disable_nort(); + lock_acquire_exclusive(&lg->lock_dep_map, 0, 0, NULL, _RET_IP_); + for_each_possible_cpu(i) { +- arch_spinlock_t *lock; ++ lg_lock_ptr *lock; + lock = per_cpu_ptr(lg->lock, i); +- arch_spin_lock(lock); ++ lg_do_lock(lock); + } + } + EXPORT_SYMBOL(lg_global_lock); +@@ -102,10 +120,35 @@ void lg_global_unlock(struct lglock *lg) + + lock_release(&lg->lock_dep_map, 1, _RET_IP_); + for_each_possible_cpu(i) { +- arch_spinlock_t *lock; ++ lg_lock_ptr *lock; + lock = per_cpu_ptr(lg->lock, i); +- arch_spin_unlock(lock); ++ lg_do_unlock(lock); + } +- preempt_enable(); ++ preempt_enable_nort(); + } + EXPORT_SYMBOL(lg_global_unlock); ++ ++#ifdef CONFIG_PREEMPT_RT_FULL ++/* ++ * HACK: If you use this, you get to keep the pieces. ++ * Used in queue_stop_cpus_work() when stop machinery ++ * is called from inactive CPU, so we can't schedule. ++ */ ++# define lg_do_trylock_relax(l) \ ++ do { \ ++ while (!__rt_spin_trylock(l)) \ ++ cpu_relax(); \ ++ } while (0) ++ ++void lg_global_trylock_relax(struct lglock *lg) ++{ ++ int i; ++ ++ lock_acquire_exclusive(&lg->lock_dep_map, 0, 0, NULL, _RET_IP_); ++ for_each_possible_cpu(i) { ++ lg_lock_ptr *lock; ++ lock = per_cpu_ptr(lg->lock, i); ++ lg_do_trylock_relax(lock); ++ } ++} ++#endif +diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c +index 589d763a49b3..4b48c4bfb60c 100644 +--- a/kernel/locking/lockdep.c ++++ b/kernel/locking/lockdep.c +@@ -3686,6 +3686,7 @@ static void check_flags(unsigned long flags) + } + } + ++#ifndef CONFIG_PREEMPT_RT_FULL + /* + * We dont accurately track softirq state in e.g. + * hardirq contexts (such as on 4KSTACKS), so only +@@ -3700,6 +3701,7 @@ static void check_flags(unsigned long flags) + DEBUG_LOCKS_WARN_ON(!current->softirqs_enabled); + } + } ++#endif + + if (!debug_locks) + print_irqtrace_events(current); +diff --git a/kernel/locking/locktorture.c b/kernel/locking/locktorture.c +index f8c5af52a131..788068773e61 100644 +--- a/kernel/locking/locktorture.c ++++ b/kernel/locking/locktorture.c +@@ -26,7 +26,6 @@ + #include <linux/kthread.h> + #include <linux/sched/rt.h> + #include <linux/spinlock.h> +-#include <linux/rwlock.h> + #include <linux/mutex.h> + #include <linux/rwsem.h> + #include <linux/smp.h> +diff --git a/kernel/locking/rt.c b/kernel/locking/rt.c +new file mode 100644 +index 000000000000..665754c00e1e +--- /dev/null ++++ b/kernel/locking/rt.c +@@ -0,0 +1,498 @@ ++/* ++ * kernel/rt.c ++ * ++ * Real-Time Preemption Support ++ * ++ * started by Ingo Molnar: ++ * ++ * Copyright (C) 2004-2006 Red Hat, Inc., Ingo Molnar <mingo@redhat.com> ++ * Copyright (C) 2006, Timesys Corp., Thomas Gleixner <tglx@timesys.com> ++ * ++ * historic credit for proving that Linux spinlocks can be implemented via ++ * RT-aware mutexes goes to many people: The Pmutex project (Dirk Grambow ++ * and others) who prototyped it on 2.4 and did lots of comparative ++ * research and analysis; TimeSys, for proving that you can implement a ++ * fully preemptible kernel via the use of IRQ threading and mutexes; ++ * Bill Huey for persuasively arguing on lkml that the mutex model is the ++ * right one; and to MontaVista, who ported pmutexes to 2.6. ++ * ++ * This code is a from-scratch implementation and is not based on pmutexes, ++ * but the idea of converting spinlocks to mutexes is used here too. ++ * ++ * lock debugging, locking tree, deadlock detection: ++ * ++ * Copyright (C) 2004, LynuxWorks, Inc., Igor Manyilov, Bill Huey ++ * Released under the General Public License (GPL). ++ * ++ * Includes portions of the generic R/W semaphore implementation from: ++ * ++ * Copyright (c) 2001 David Howells (dhowells@redhat.com). ++ * - Derived partially from idea by Andrea Arcangeli <andrea@suse.de> ++ * - Derived also from comments by Linus ++ * ++ * Pending ownership of locks and ownership stealing: ++ * ++ * Copyright (C) 2005, Kihon Technologies Inc., Steven Rostedt ++ * ++ * (also by Steven Rostedt) ++ * - Converted single pi_lock to individual task locks. ++ * ++ * By Esben Nielsen: ++ * Doing priority inheritance with help of the scheduler. ++ * ++ * Copyright (C) 2006, Timesys Corp., Thomas Gleixner <tglx@timesys.com> ++ * - major rework based on Esben Nielsens initial patch ++ * - replaced thread_info references by task_struct refs ++ * - removed task->pending_owner dependency ++ * - BKL drop/reacquire for semaphore style locks to avoid deadlocks ++ * in the scheduler return path as discussed with Steven Rostedt ++ * ++ * Copyright (C) 2006, Kihon Technologies Inc. ++ * Steven Rostedt <rostedt@goodmis.org> ++ * - debugged and patched Thomas Gleixner's rework. ++ * - added back the cmpxchg to the rework. ++ * - turned atomic require back on for SMP. ++ */ ++ ++#include <linux/spinlock.h> ++#include <linux/rtmutex.h> ++#include <linux/sched.h> ++#include <linux/delay.h> ++#include <linux/module.h> ++#include <linux/kallsyms.h> ++#include <linux/syscalls.h> ++#include <linux/interrupt.h> ++#include <linux/plist.h> ++#include <linux/fs.h> ++#include <linux/futex.h> ++#include <linux/hrtimer.h> ++ ++#include "rtmutex_common.h" ++ ++/* ++ * struct mutex functions ++ */ ++void __mutex_do_init(struct mutex *mutex, const char *name, ++ struct lock_class_key *key) ++{ ++#ifdef CONFIG_DEBUG_LOCK_ALLOC ++ /* ++ * Make sure we are not reinitializing a held lock: ++ */ ++ debug_check_no_locks_freed((void *)mutex, sizeof(*mutex)); ++ lockdep_init_map(&mutex->dep_map, name, key, 0); ++#endif ++ mutex->lock.save_state = 0; ++} ++EXPORT_SYMBOL(__mutex_do_init); ++ ++void __lockfunc _mutex_lock(struct mutex *lock) ++{ ++ mutex_acquire(&lock->dep_map, 0, 0, _RET_IP_); ++ rt_mutex_lock(&lock->lock); ++} ++EXPORT_SYMBOL(_mutex_lock); ++ ++int __lockfunc _mutex_lock_interruptible(struct mutex *lock) ++{ ++ int ret; ++ ++ mutex_acquire(&lock->dep_map, 0, 0, _RET_IP_); ++ ret = rt_mutex_lock_interruptible(&lock->lock); ++ if (ret) ++ mutex_release(&lock->dep_map, 1, _RET_IP_); ++ return ret; ++} ++EXPORT_SYMBOL(_mutex_lock_interruptible); ++ ++int __lockfunc _mutex_lock_killable(struct mutex *lock) ++{ ++ int ret; ++ ++ mutex_acquire(&lock->dep_map, 0, 0, _RET_IP_); ++ ret = rt_mutex_lock_killable(&lock->lock); ++ if (ret) ++ mutex_release(&lock->dep_map, 1, _RET_IP_); ++ return ret; ++} ++EXPORT_SYMBOL(_mutex_lock_killable); ++ ++#ifdef CONFIG_DEBUG_LOCK_ALLOC ++void __lockfunc _mutex_lock_nested(struct mutex *lock, int subclass) ++{ ++ mutex_acquire_nest(&lock->dep_map, subclass, 0, NULL, _RET_IP_); ++ rt_mutex_lock(&lock->lock); ++} ++EXPORT_SYMBOL(_mutex_lock_nested); ++ ++void __lockfunc _mutex_lock_nest_lock(struct mutex *lock, struct lockdep_map *nest) ++{ ++ mutex_acquire_nest(&lock->dep_map, 0, 0, nest, _RET_IP_); ++ rt_mutex_lock(&lock->lock); ++} ++EXPORT_SYMBOL(_mutex_lock_nest_lock); ++ ++int __lockfunc _mutex_lock_interruptible_nested(struct mutex *lock, int subclass) ++{ ++ int ret; ++ ++ mutex_acquire_nest(&lock->dep_map, subclass, 0, NULL, _RET_IP_); ++ ret = rt_mutex_lock_interruptible(&lock->lock); ++ if (ret) ++ mutex_release(&lock->dep_map, 1, _RET_IP_); ++ return ret; ++} ++EXPORT_SYMBOL(_mutex_lock_interruptible_nested); ++ ++int __lockfunc _mutex_lock_killable_nested(struct mutex *lock, int subclass) ++{ ++ int ret; ++ ++ mutex_acquire(&lock->dep_map, subclass, 0, _RET_IP_); ++ ret = rt_mutex_lock_killable(&lock->lock); ++ if (ret) ++ mutex_release(&lock->dep_map, 1, _RET_IP_); ++ return ret; ++} ++EXPORT_SYMBOL(_mutex_lock_killable_nested); ++#endif ++ ++int __lockfunc _mutex_trylock(struct mutex *lock) ++{ ++ int ret = rt_mutex_trylock(&lock->lock); ++ ++ if (ret) ++ mutex_acquire(&lock->dep_map, 0, 1, _RET_IP_); ++ ++ return ret; ++} ++EXPORT_SYMBOL(_mutex_trylock); ++ ++void __lockfunc _mutex_unlock(struct mutex *lock) ++{ ++ mutex_release(&lock->dep_map, 1, _RET_IP_); ++ rt_mutex_unlock(&lock->lock); ++} ++EXPORT_SYMBOL(_mutex_unlock); ++ ++/* ++ * rwlock_t functions ++ */ ++int __lockfunc rt_write_trylock(rwlock_t *rwlock) ++{ ++ int ret; ++ ++ migrate_disable(); ++ ret = rt_mutex_trylock(&rwlock->lock); ++ if (ret) ++ rwlock_acquire(&rwlock->dep_map, 0, 1, _RET_IP_); ++ else ++ migrate_enable(); ++ ++ return ret; ++} ++EXPORT_SYMBOL(rt_write_trylock); ++ ++int __lockfunc rt_write_trylock_irqsave(rwlock_t *rwlock, unsigned long *flags) ++{ ++ int ret; ++ ++ *flags = 0; ++ ret = rt_write_trylock(rwlock); ++ return ret; ++} ++EXPORT_SYMBOL(rt_write_trylock_irqsave); ++ ++int __lockfunc rt_read_trylock(rwlock_t *rwlock) ++{ ++ struct rt_mutex *lock = &rwlock->lock; ++ int ret = 1; ++ ++ /* ++ * recursive read locks succeed when current owns the lock, ++ * but not when read_depth == 0 which means that the lock is ++ * write locked. ++ */ ++ if (rt_mutex_owner(lock) != current) { ++ migrate_disable(); ++ ret = rt_mutex_trylock(lock); ++ if (ret) ++ rwlock_acquire(&rwlock->dep_map, 0, 1, _RET_IP_); ++ else ++ migrate_enable(); ++ ++ } else if (!rwlock->read_depth) { ++ ret = 0; ++ } ++ ++ if (ret) ++ rwlock->read_depth++; ++ ++ return ret; ++} ++EXPORT_SYMBOL(rt_read_trylock); ++ ++void __lockfunc rt_write_lock(rwlock_t *rwlock) ++{ ++ rwlock_acquire(&rwlock->dep_map, 0, 0, _RET_IP_); ++ __rt_spin_lock(&rwlock->lock); ++} ++EXPORT_SYMBOL(rt_write_lock); ++ ++void __lockfunc rt_read_lock(rwlock_t *rwlock) ++{ ++ struct rt_mutex *lock = &rwlock->lock; ++ ++ ++ /* ++ * recursive read locks succeed when current owns the lock ++ */ ++ if (rt_mutex_owner(lock) != current) { ++ rwlock_acquire(&rwlock->dep_map, 0, 0, _RET_IP_); ++ __rt_spin_lock(lock); ++ } ++ rwlock->read_depth++; ++} ++ ++EXPORT_SYMBOL(rt_read_lock); ++ ++void __lockfunc rt_write_unlock(rwlock_t *rwlock) ++{ ++ /* NOTE: we always pass in '1' for nested, for simplicity */ ++ rwlock_release(&rwlock->dep_map, 1, _RET_IP_); ++ __rt_spin_unlock(&rwlock->lock); ++ migrate_enable(); ++} ++EXPORT_SYMBOL(rt_write_unlock); ++ ++void __lockfunc rt_read_unlock(rwlock_t *rwlock) ++{ ++ /* Release the lock only when read_depth is down to 0 */ ++ if (--rwlock->read_depth == 0) { ++ rwlock_release(&rwlock->dep_map, 1, _RET_IP_); ++ __rt_spin_unlock(&rwlock->lock); ++ migrate_enable(); ++ } ++} ++EXPORT_SYMBOL(rt_read_unlock); ++ ++unsigned long __lockfunc rt_write_lock_irqsave(rwlock_t *rwlock) ++{ ++ rt_write_lock(rwlock); ++ ++ return 0; ++} ++EXPORT_SYMBOL(rt_write_lock_irqsave); ++ ++unsigned long __lockfunc rt_read_lock_irqsave(rwlock_t *rwlock) ++{ ++ rt_read_lock(rwlock); ++ ++ return 0; ++} ++EXPORT_SYMBOL(rt_read_lock_irqsave); ++ ++void __rt_rwlock_init(rwlock_t *rwlock, char *name, struct lock_class_key *key) ++{ ++#ifdef CONFIG_DEBUG_LOCK_ALLOC ++ /* ++ * Make sure we are not reinitializing a held lock: ++ */ ++ debug_check_no_locks_freed((void *)rwlock, sizeof(*rwlock)); ++ lockdep_init_map(&rwlock->dep_map, name, key, 0); ++#endif ++ rwlock->lock.save_state = 1; ++ rwlock->read_depth = 0; ++} ++EXPORT_SYMBOL(__rt_rwlock_init); ++ ++/* ++ * rw_semaphores ++ */ ++ ++void rt_up_write(struct rw_semaphore *rwsem) ++{ ++ rwsem_release(&rwsem->dep_map, 1, _RET_IP_); ++ rt_mutex_unlock(&rwsem->lock); ++} ++EXPORT_SYMBOL(rt_up_write); ++ ++void __rt_up_read(struct rw_semaphore *rwsem) ++{ ++ if (--rwsem->read_depth == 0) ++ rt_mutex_unlock(&rwsem->lock); ++} ++ ++void rt_up_read(struct rw_semaphore *rwsem) ++{ ++ rwsem_release(&rwsem->dep_map, 1, _RET_IP_); ++ __rt_up_read(rwsem); ++} ++EXPORT_SYMBOL(rt_up_read); ++ ++/* ++ * downgrade a write lock into a read lock ++ * - just wake up any readers at the front of the queue ++ */ ++void rt_downgrade_write(struct rw_semaphore *rwsem) ++{ ++ BUG_ON(rt_mutex_owner(&rwsem->lock) != current); ++ rwsem->read_depth = 1; ++} ++EXPORT_SYMBOL(rt_downgrade_write); ++ ++int rt_down_write_trylock(struct rw_semaphore *rwsem) ++{ ++ int ret = rt_mutex_trylock(&rwsem->lock); ++ ++ if (ret) ++ rwsem_acquire(&rwsem->dep_map, 0, 1, _RET_IP_); ++ return ret; ++} ++EXPORT_SYMBOL(rt_down_write_trylock); ++ ++void rt_down_write(struct rw_semaphore *rwsem) ++{ ++ rwsem_acquire(&rwsem->dep_map, 0, 0, _RET_IP_); ++ rt_mutex_lock(&rwsem->lock); ++} ++EXPORT_SYMBOL(rt_down_write); ++ ++int rt_down_write_killable(struct rw_semaphore *rwsem) ++{ ++ int ret; ++ ++ rwsem_acquire(&rwsem->dep_map, 0, 0, _RET_IP_); ++ ret = rt_mutex_lock_killable(&rwsem->lock); ++ if (ret) ++ rwsem_release(&rwsem->dep_map, 1, _RET_IP_); ++ return ret; ++} ++EXPORT_SYMBOL(rt_down_write_killable); ++ ++int rt_down_write_killable_nested(struct rw_semaphore *rwsem, int subclass) ++{ ++ int ret; ++ ++ rwsem_acquire(&rwsem->dep_map, subclass, 0, _RET_IP_); ++ ret = rt_mutex_lock_killable(&rwsem->lock); ++ if (ret) ++ rwsem_release(&rwsem->dep_map, 1, _RET_IP_); ++ return ret; ++} ++EXPORT_SYMBOL(rt_down_write_killable_nested); ++ ++void rt_down_write_nested(struct rw_semaphore *rwsem, int subclass) ++{ ++ rwsem_acquire(&rwsem->dep_map, subclass, 0, _RET_IP_); ++ rt_mutex_lock(&rwsem->lock); ++} ++EXPORT_SYMBOL(rt_down_write_nested); ++ ++void rt_down_write_nested_lock(struct rw_semaphore *rwsem, ++ struct lockdep_map *nest) ++{ ++ rwsem_acquire_nest(&rwsem->dep_map, 0, 0, nest, _RET_IP_); ++ rt_mutex_lock(&rwsem->lock); ++} ++EXPORT_SYMBOL(rt_down_write_nested_lock); ++ ++int rt__down_read_trylock(struct rw_semaphore *rwsem) ++{ ++ struct rt_mutex *lock = &rwsem->lock; ++ int ret = 1; ++ ++ /* ++ * recursive read locks succeed when current owns the rwsem, ++ * but not when read_depth == 0 which means that the rwsem is ++ * write locked. ++ */ ++ if (rt_mutex_owner(lock) != current) ++ ret = rt_mutex_trylock(&rwsem->lock); ++ else if (!rwsem->read_depth) ++ ret = 0; ++ ++ if (ret) ++ rwsem->read_depth++; ++ return ret; ++ ++} ++ ++int rt_down_read_trylock(struct rw_semaphore *rwsem) ++{ ++ int ret; ++ ++ ret = rt__down_read_trylock(rwsem); ++ if (ret) ++ rwsem_acquire(&rwsem->dep_map, 0, 1, _RET_IP_); ++ ++ return ret; ++} ++EXPORT_SYMBOL(rt_down_read_trylock); ++ ++void rt__down_read(struct rw_semaphore *rwsem) ++{ ++ struct rt_mutex *lock = &rwsem->lock; ++ ++ if (rt_mutex_owner(lock) != current) ++ rt_mutex_lock(&rwsem->lock); ++ rwsem->read_depth++; ++} ++EXPORT_SYMBOL(rt__down_read); ++ ++static void __rt_down_read(struct rw_semaphore *rwsem, int subclass) ++{ ++ rwsem_acquire_read(&rwsem->dep_map, subclass, 0, _RET_IP_); ++ rt__down_read(rwsem); ++} ++ ++void rt_down_read(struct rw_semaphore *rwsem) ++{ ++ __rt_down_read(rwsem, 0); ++} ++EXPORT_SYMBOL(rt_down_read); ++ ++void rt_down_read_nested(struct rw_semaphore *rwsem, int subclass) ++{ ++ __rt_down_read(rwsem, subclass); ++} ++EXPORT_SYMBOL(rt_down_read_nested); ++ ++void __rt_rwsem_init(struct rw_semaphore *rwsem, const char *name, ++ struct lock_class_key *key) ++{ ++#ifdef CONFIG_DEBUG_LOCK_ALLOC ++ /* ++ * Make sure we are not reinitializing a held lock: ++ */ ++ debug_check_no_locks_freed((void *)rwsem, sizeof(*rwsem)); ++ lockdep_init_map(&rwsem->dep_map, name, key, 0); ++#endif ++ rwsem->read_depth = 0; ++ rwsem->lock.save_state = 0; ++} ++EXPORT_SYMBOL(__rt_rwsem_init); ++ ++/** ++ * atomic_dec_and_mutex_lock - return holding mutex if we dec to 0 ++ * @cnt: the atomic which we are to dec ++ * @lock: the mutex to return holding if we dec to 0 ++ * ++ * return true and hold lock if we dec to 0, return false otherwise ++ */ ++int atomic_dec_and_mutex_lock(atomic_t *cnt, struct mutex *lock) ++{ ++ /* dec if we can't possibly hit 0 */ ++ if (atomic_add_unless(cnt, -1, 1)) ++ return 0; ++ /* we might hit 0, so take the lock */ ++ mutex_lock(lock); ++ if (!atomic_dec_and_test(cnt)) { ++ /* when we actually did the dec, we didn't hit 0 */ ++ mutex_unlock(lock); ++ return 0; ++ } ++ /* we hit 0, and we hold the lock */ ++ return 1; ++} ++EXPORT_SYMBOL(atomic_dec_and_mutex_lock); +diff --git a/kernel/locking/rtmutex.c b/kernel/locking/rtmutex.c +index 1ec0f48962b3..2576f7ccf8e2 100644 +--- a/kernel/locking/rtmutex.c ++++ b/kernel/locking/rtmutex.c +@@ -7,6 +7,11 @@ + * Copyright (C) 2005-2006 Timesys Corp., Thomas Gleixner <tglx@timesys.com> + * Copyright (C) 2005 Kihon Technologies Inc., Steven Rostedt + * Copyright (C) 2006 Esben Nielsen ++ * Adaptive Spinlocks: ++ * Copyright (C) 2008 Novell, Inc., Gregory Haskins, Sven Dietrich, ++ * and Peter Morreale, ++ * Adaptive Spinlocks simplification: ++ * Copyright (C) 2008 Red Hat, Inc., Steven Rostedt <srostedt@redhat.com> + * + * See Documentation/locking/rt-mutex-design.txt for details. + */ +@@ -16,6 +21,7 @@ + #include <linux/sched/rt.h> + #include <linux/sched/deadline.h> + #include <linux/timer.h> ++#include <linux/ww_mutex.h> + + #include "rtmutex_common.h" + +@@ -69,6 +75,12 @@ static void fixup_rt_mutex_waiters(struct rt_mutex *lock) + clear_rt_mutex_waiters(lock); + } + ++static int rt_mutex_real_waiter(struct rt_mutex_waiter *waiter) ++{ ++ return waiter && waiter != PI_WAKEUP_INPROGRESS && ++ waiter != PI_REQUEUE_INPROGRESS; ++} ++ + /* + * We can speed up the acquire/release, if there's no debugging state to be + * set up. +@@ -350,6 +362,14 @@ static bool rt_mutex_cond_detect_deadlock(struct rt_mutex_waiter *waiter, + return debug_rt_mutex_detect_deadlock(waiter, chwalk); + } + ++static void rt_mutex_wake_waiter(struct rt_mutex_waiter *waiter) ++{ ++ if (waiter->savestate) ++ wake_up_lock_sleeper(waiter->task); ++ else ++ wake_up_process(waiter->task); ++} ++ + /* + * Max number of times we'll walk the boosting chain: + */ +@@ -357,7 +377,8 @@ int max_lock_depth = 1024; + + static inline struct rt_mutex *task_blocked_on_lock(struct task_struct *p) + { +- return p->pi_blocked_on ? p->pi_blocked_on->lock : NULL; ++ return rt_mutex_real_waiter(p->pi_blocked_on) ? ++ p->pi_blocked_on->lock : NULL; + } + + /* +@@ -493,7 +514,7 @@ static int rt_mutex_adjust_prio_chain(struct task_struct *task, + * reached or the state of the chain has changed while we + * dropped the locks. + */ +- if (!waiter) ++ if (!rt_mutex_real_waiter(waiter)) + goto out_unlock_pi; + + /* +@@ -655,13 +676,16 @@ static int rt_mutex_adjust_prio_chain(struct task_struct *task, + * follow here. This is the end of the chain we are walking. + */ + if (!rt_mutex_owner(lock)) { ++ struct rt_mutex_waiter *lock_top_waiter; ++ + /* + * If the requeue [7] above changed the top waiter, + * then we need to wake the new top waiter up to try + * to get the lock. + */ +- if (prerequeue_top_waiter != rt_mutex_top_waiter(lock)) +- wake_up_process(rt_mutex_top_waiter(lock)->task); ++ lock_top_waiter = rt_mutex_top_waiter(lock); ++ if (prerequeue_top_waiter != lock_top_waiter) ++ rt_mutex_wake_waiter(lock_top_waiter); + raw_spin_unlock_irq(&lock->wait_lock); + return 0; + } +@@ -754,6 +778,25 @@ static int rt_mutex_adjust_prio_chain(struct task_struct *task, + return ret; + } + ++ ++#define STEAL_NORMAL 0 ++#define STEAL_LATERAL 1 ++ ++/* ++ * Note that RT tasks are excluded from lateral-steals to prevent the ++ * introduction of an unbounded latency ++ */ ++static inline int lock_is_stealable(struct task_struct *task, ++ struct task_struct *pendowner, int mode) ++{ ++ if (mode == STEAL_NORMAL || rt_task(task)) { ++ if (task->prio >= pendowner->prio) ++ return 0; ++ } else if (task->prio > pendowner->prio) ++ return 0; ++ return 1; ++} ++ + /* + * Try to take an rt-mutex + * +@@ -764,8 +807,9 @@ static int rt_mutex_adjust_prio_chain(struct task_struct *task, + * @waiter: The waiter that is queued to the lock's wait tree if the + * callsite called task_blocked_on_lock(), otherwise NULL + */ +-static int try_to_take_rt_mutex(struct rt_mutex *lock, struct task_struct *task, +- struct rt_mutex_waiter *waiter) ++static int __try_to_take_rt_mutex(struct rt_mutex *lock, ++ struct task_struct *task, ++ struct rt_mutex_waiter *waiter, int mode) + { + /* + * Before testing whether we can acquire @lock, we set the +@@ -802,8 +846,10 @@ static int try_to_take_rt_mutex(struct rt_mutex *lock, struct task_struct *task, + * If waiter is not the highest priority waiter of + * @lock, give up. + */ +- if (waiter != rt_mutex_top_waiter(lock)) ++ if (waiter != rt_mutex_top_waiter(lock)) { ++ /* XXX lock_is_stealable() ? */ + return 0; ++ } + + /* + * We can acquire the lock. Remove the waiter from the +@@ -821,14 +867,10 @@ static int try_to_take_rt_mutex(struct rt_mutex *lock, struct task_struct *task, + * not need to be dequeued. + */ + if (rt_mutex_has_waiters(lock)) { +- /* +- * If @task->prio is greater than or equal to +- * the top waiter priority (kernel view), +- * @task lost. +- */ +- if (task->prio >= rt_mutex_top_waiter(lock)->prio) +- return 0; ++ struct task_struct *pown = rt_mutex_top_waiter(lock)->task; + ++ if (task != pown && !lock_is_stealable(task, pown, mode)) ++ return 0; + /* + * The current top waiter stays enqueued. We + * don't have to change anything in the lock +@@ -877,6 +919,438 @@ static int try_to_take_rt_mutex(struct rt_mutex *lock, struct task_struct *task, + return 1; + } + ++#ifdef CONFIG_PREEMPT_RT_FULL ++/* ++ * preemptible spin_lock functions: ++ */ ++static inline void rt_spin_lock_fastlock(struct rt_mutex *lock, ++ void (*slowfn)(struct rt_mutex *lock, ++ bool mg_off), ++ bool do_mig_dis) ++{ ++ might_sleep_no_state_check(); ++ ++ if (do_mig_dis) ++ migrate_disable(); ++ ++ if (likely(rt_mutex_cmpxchg_acquire(lock, NULL, current))) ++ rt_mutex_deadlock_account_lock(lock, current); ++ else ++ slowfn(lock, do_mig_dis); ++} ++ ++static inline int rt_spin_lock_fastunlock(struct rt_mutex *lock, ++ int (*slowfn)(struct rt_mutex *lock)) ++{ ++ if (likely(rt_mutex_cmpxchg_release(lock, current, NULL))) { ++ rt_mutex_deadlock_account_unlock(current); ++ return 0; ++ } ++ return slowfn(lock); ++} ++#ifdef CONFIG_SMP ++/* ++ * Note that owner is a speculative pointer and dereferencing relies ++ * on rcu_read_lock() and the check against the lock owner. ++ */ ++static int adaptive_wait(struct rt_mutex *lock, ++ struct task_struct *owner) ++{ ++ int res = 0; ++ ++ rcu_read_lock(); ++ for (;;) { ++ if (owner != rt_mutex_owner(lock)) ++ break; ++ /* ++ * Ensure that owner->on_cpu is dereferenced _after_ ++ * checking the above to be valid. ++ */ ++ barrier(); ++ if (!owner->on_cpu) { ++ res = 1; ++ break; ++ } ++ cpu_relax(); ++ } ++ rcu_read_unlock(); ++ return res; ++} ++#else ++static int adaptive_wait(struct rt_mutex *lock, ++ struct task_struct *orig_owner) ++{ ++ return 1; ++} ++#endif ++ ++static int task_blocks_on_rt_mutex(struct rt_mutex *lock, ++ struct rt_mutex_waiter *waiter, ++ struct task_struct *task, ++ enum rtmutex_chainwalk chwalk); ++/* ++ * Slow path lock function spin_lock style: this variant is very ++ * careful not to miss any non-lock wakeups. ++ * ++ * We store the current state under p->pi_lock in p->saved_state and ++ * the try_to_wake_up() code handles this accordingly. ++ */ ++static void noinline __sched rt_spin_lock_slowlock(struct rt_mutex *lock, ++ bool mg_off) ++{ ++ struct task_struct *lock_owner, *self = current; ++ struct rt_mutex_waiter waiter, *top_waiter; ++ unsigned long flags; ++ int ret; ++ ++ rt_mutex_init_waiter(&waiter, true); ++ ++ raw_spin_lock_irqsave(&lock->wait_lock, flags); ++ ++ if (__try_to_take_rt_mutex(lock, self, NULL, STEAL_LATERAL)) { ++ raw_spin_unlock_irqrestore(&lock->wait_lock, flags); ++ return; ++ } ++ ++ BUG_ON(rt_mutex_owner(lock) == self); ++ ++ /* ++ * We save whatever state the task is in and we'll restore it ++ * after acquiring the lock taking real wakeups into account ++ * as well. We are serialized via pi_lock against wakeups. See ++ * try_to_wake_up(). ++ */ ++ raw_spin_lock(&self->pi_lock); ++ self->saved_state = self->state; ++ __set_current_state_no_track(TASK_UNINTERRUPTIBLE); ++ raw_spin_unlock(&self->pi_lock); ++ ++ ret = task_blocks_on_rt_mutex(lock, &waiter, self, RT_MUTEX_MIN_CHAINWALK); ++ BUG_ON(ret); ++ ++ for (;;) { ++ /* Try to acquire the lock again. */ ++ if (__try_to_take_rt_mutex(lock, self, &waiter, STEAL_LATERAL)) ++ break; ++ ++ top_waiter = rt_mutex_top_waiter(lock); ++ lock_owner = rt_mutex_owner(lock); ++ ++ raw_spin_unlock_irqrestore(&lock->wait_lock, flags); ++ ++ debug_rt_mutex_print_deadlock(&waiter); ++ ++ if (top_waiter != &waiter || adaptive_wait(lock, lock_owner)) { ++ if (mg_off) ++ migrate_enable(); ++ schedule(); ++ if (mg_off) ++ migrate_disable(); ++ } ++ ++ raw_spin_lock_irqsave(&lock->wait_lock, flags); ++ ++ raw_spin_lock(&self->pi_lock); ++ __set_current_state_no_track(TASK_UNINTERRUPTIBLE); ++ raw_spin_unlock(&self->pi_lock); ++ } ++ ++ /* ++ * Restore the task state to current->saved_state. We set it ++ * to the original state above and the try_to_wake_up() code ++ * has possibly updated it when a real (non-rtmutex) wakeup ++ * happened while we were blocked. Clear saved_state so ++ * try_to_wakeup() does not get confused. ++ */ ++ raw_spin_lock(&self->pi_lock); ++ __set_current_state_no_track(self->saved_state); ++ self->saved_state = TASK_RUNNING; ++ raw_spin_unlock(&self->pi_lock); ++ ++ /* ++ * try_to_take_rt_mutex() sets the waiter bit ++ * unconditionally. We might have to fix that up: ++ */ ++ fixup_rt_mutex_waiters(lock); ++ ++ BUG_ON(rt_mutex_has_waiters(lock) && &waiter == rt_mutex_top_waiter(lock)); ++ BUG_ON(!RB_EMPTY_NODE(&waiter.tree_entry)); ++ ++ raw_spin_unlock_irqrestore(&lock->wait_lock, flags); ++ ++ debug_rt_mutex_free_waiter(&waiter); ++} ++ ++static void mark_wakeup_next_waiter(struct wake_q_head *wake_q, ++ struct wake_q_head *wake_sleeper_q, ++ struct rt_mutex *lock); ++/* ++ * Slow path to release a rt_mutex spin_lock style ++ */ ++static int noinline __sched rt_spin_lock_slowunlock(struct rt_mutex *lock) ++{ ++ unsigned long flags; ++ WAKE_Q(wake_q); ++ WAKE_Q(wake_sleeper_q); ++ ++ raw_spin_lock_irqsave(&lock->wait_lock, flags); ++ ++ debug_rt_mutex_unlock(lock); ++ ++ rt_mutex_deadlock_account_unlock(current); ++ ++ if (!rt_mutex_has_waiters(lock)) { ++ lock->owner = NULL; ++ raw_spin_unlock_irqrestore(&lock->wait_lock, flags); ++ return 0; ++ } ++ ++ mark_wakeup_next_waiter(&wake_q, &wake_sleeper_q, lock); ++ ++ raw_spin_unlock_irqrestore(&lock->wait_lock, flags); ++ wake_up_q(&wake_q); ++ wake_up_q_sleeper(&wake_sleeper_q); ++ ++ /* Undo pi boosting.when necessary */ ++ rt_mutex_adjust_prio(current); ++ return 0; ++} ++ ++static int noinline __sched rt_spin_lock_slowunlock_no_deboost(struct rt_mutex *lock) ++{ ++ unsigned long flags; ++ WAKE_Q(wake_q); ++ WAKE_Q(wake_sleeper_q); ++ ++ raw_spin_lock_irqsave(&lock->wait_lock, flags); ++ ++ debug_rt_mutex_unlock(lock); ++ ++ rt_mutex_deadlock_account_unlock(current); ++ ++ if (!rt_mutex_has_waiters(lock)) { ++ lock->owner = NULL; ++ raw_spin_unlock_irqrestore(&lock->wait_lock, flags); ++ return 0; ++ } ++ ++ mark_wakeup_next_waiter(&wake_q, &wake_sleeper_q, lock); ++ ++ raw_spin_unlock_irqrestore(&lock->wait_lock, flags); ++ wake_up_q(&wake_q); ++ wake_up_q_sleeper(&wake_sleeper_q); ++ return 1; ++} ++ ++void __lockfunc rt_spin_lock__no_mg(spinlock_t *lock) ++{ ++ rt_spin_lock_fastlock(&lock->lock, rt_spin_lock_slowlock, false); ++ spin_acquire(&lock->dep_map, 0, 0, _RET_IP_); ++} ++EXPORT_SYMBOL(rt_spin_lock__no_mg); ++ ++void __lockfunc rt_spin_lock(spinlock_t *lock) ++{ ++ rt_spin_lock_fastlock(&lock->lock, rt_spin_lock_slowlock, true); ++ spin_acquire(&lock->dep_map, 0, 0, _RET_IP_); ++} ++EXPORT_SYMBOL(rt_spin_lock); ++ ++void __lockfunc __rt_spin_lock(struct rt_mutex *lock) ++{ ++ rt_spin_lock_fastlock(lock, rt_spin_lock_slowlock, true); ++} ++EXPORT_SYMBOL(__rt_spin_lock); ++ ++void __lockfunc __rt_spin_lock__no_mg(struct rt_mutex *lock) ++{ ++ rt_spin_lock_fastlock(lock, rt_spin_lock_slowlock, false); ++} ++EXPORT_SYMBOL(__rt_spin_lock__no_mg); ++ ++#ifdef CONFIG_DEBUG_LOCK_ALLOC ++void __lockfunc rt_spin_lock_nested(spinlock_t *lock, int subclass) ++{ ++ spin_acquire(&lock->dep_map, subclass, 0, _RET_IP_); ++ rt_spin_lock_fastlock(&lock->lock, rt_spin_lock_slowlock, true); ++} ++EXPORT_SYMBOL(rt_spin_lock_nested); ++#endif ++ ++void __lockfunc rt_spin_unlock__no_mg(spinlock_t *lock) ++{ ++ /* NOTE: we always pass in '1' for nested, for simplicity */ ++ spin_release(&lock->dep_map, 1, _RET_IP_); ++ rt_spin_lock_fastunlock(&lock->lock, rt_spin_lock_slowunlock); ++} ++EXPORT_SYMBOL(rt_spin_unlock__no_mg); ++ ++void __lockfunc rt_spin_unlock(spinlock_t *lock) ++{ ++ /* NOTE: we always pass in '1' for nested, for simplicity */ ++ spin_release(&lock->dep_map, 1, _RET_IP_); ++ rt_spin_lock_fastunlock(&lock->lock, rt_spin_lock_slowunlock); ++ migrate_enable(); ++} ++EXPORT_SYMBOL(rt_spin_unlock); ++ ++int __lockfunc rt_spin_unlock_no_deboost(spinlock_t *lock) ++{ ++ int ret; ++ ++ /* NOTE: we always pass in '1' for nested, for simplicity */ ++ spin_release(&lock->dep_map, 1, _RET_IP_); ++ ret = rt_spin_lock_fastunlock(&lock->lock, rt_spin_lock_slowunlock_no_deboost); ++ migrate_enable(); ++ return ret; ++} ++ ++void __lockfunc __rt_spin_unlock(struct rt_mutex *lock) ++{ ++ rt_spin_lock_fastunlock(lock, rt_spin_lock_slowunlock); ++} ++EXPORT_SYMBOL(__rt_spin_unlock); ++ ++/* ++ * Wait for the lock to get unlocked: instead of polling for an unlock ++ * (like raw spinlocks do), we lock and unlock, to force the kernel to ++ * schedule if there's contention: ++ */ ++void __lockfunc rt_spin_unlock_wait(spinlock_t *lock) ++{ ++ spin_lock(lock); ++ spin_unlock(lock); ++} ++EXPORT_SYMBOL(rt_spin_unlock_wait); ++ ++int __lockfunc __rt_spin_trylock(struct rt_mutex *lock) ++{ ++ return rt_mutex_trylock(lock); ++} ++ ++int __lockfunc rt_spin_trylock__no_mg(spinlock_t *lock) ++{ ++ int ret; ++ ++ ret = rt_mutex_trylock(&lock->lock); ++ if (ret) ++ spin_acquire(&lock->dep_map, 0, 1, _RET_IP_); ++ return ret; ++} ++EXPORT_SYMBOL(rt_spin_trylock__no_mg); ++ ++int __lockfunc rt_spin_trylock(spinlock_t *lock) ++{ ++ int ret; ++ ++ migrate_disable(); ++ ret = rt_mutex_trylock(&lock->lock); ++ if (ret) ++ spin_acquire(&lock->dep_map, 0, 1, _RET_IP_); ++ else ++ migrate_enable(); ++ return ret; ++} ++EXPORT_SYMBOL(rt_spin_trylock); ++ ++int __lockfunc rt_spin_trylock_bh(spinlock_t *lock) ++{ ++ int ret; ++ ++ local_bh_disable(); ++ ret = rt_mutex_trylock(&lock->lock); ++ if (ret) { ++ migrate_disable(); ++ spin_acquire(&lock->dep_map, 0, 1, _RET_IP_); ++ } else ++ local_bh_enable(); ++ return ret; ++} ++EXPORT_SYMBOL(rt_spin_trylock_bh); ++ ++int __lockfunc rt_spin_trylock_irqsave(spinlock_t *lock, unsigned long *flags) ++{ ++ int ret; ++ ++ *flags = 0; ++ ret = rt_mutex_trylock(&lock->lock); ++ if (ret) { ++ migrate_disable(); ++ spin_acquire(&lock->dep_map, 0, 1, _RET_IP_); ++ } ++ return ret; ++} ++EXPORT_SYMBOL(rt_spin_trylock_irqsave); ++ ++int atomic_dec_and_spin_lock(atomic_t *atomic, spinlock_t *lock) ++{ ++ /* Subtract 1 from counter unless that drops it to 0 (ie. it was 1) */ ++ if (atomic_add_unless(atomic, -1, 1)) ++ return 0; ++ rt_spin_lock(lock); ++ if (atomic_dec_and_test(atomic)) ++ return 1; ++ rt_spin_unlock(lock); ++ return 0; ++} ++EXPORT_SYMBOL(atomic_dec_and_spin_lock); ++ ++ void ++__rt_spin_lock_init(spinlock_t *lock, char *name, struct lock_class_key *key) ++{ ++#ifdef CONFIG_DEBUG_LOCK_ALLOC ++ /* ++ * Make sure we are not reinitializing a held lock: ++ */ ++ debug_check_no_locks_freed((void *)lock, sizeof(*lock)); ++ lockdep_init_map(&lock->dep_map, name, key, 0); ++#endif ++} ++EXPORT_SYMBOL(__rt_spin_lock_init); ++ ++#endif /* PREEMPT_RT_FULL */ ++ ++#ifdef CONFIG_PREEMPT_RT_FULL ++ static inline int __sched ++__mutex_lock_check_stamp(struct rt_mutex *lock, struct ww_acquire_ctx *ctx) ++{ ++ struct ww_mutex *ww = container_of(lock, struct ww_mutex, base.lock); ++ struct ww_acquire_ctx *hold_ctx = ACCESS_ONCE(ww->ctx); ++ ++ if (!hold_ctx) ++ return 0; ++ ++ if (unlikely(ctx == hold_ctx)) ++ return -EALREADY; ++ ++ if (ctx->stamp - hold_ctx->stamp <= LONG_MAX && ++ (ctx->stamp != hold_ctx->stamp || ctx > hold_ctx)) { ++#ifdef CONFIG_DEBUG_MUTEXES ++ DEBUG_LOCKS_WARN_ON(ctx->contending_lock); ++ ctx->contending_lock = ww; ++#endif ++ return -EDEADLK; ++ } ++ ++ return 0; ++} ++#else ++ static inline int __sched ++__mutex_lock_check_stamp(struct rt_mutex *lock, struct ww_acquire_ctx *ctx) ++{ ++ BUG(); ++ return 0; ++} ++ ++#endif ++ ++static inline int ++try_to_take_rt_mutex(struct rt_mutex *lock, struct task_struct *task, ++ struct rt_mutex_waiter *waiter) ++{ ++ return __try_to_take_rt_mutex(lock, task, waiter, STEAL_NORMAL); ++} ++ + /* + * Task blocks on lock. + * +@@ -907,6 +1381,23 @@ static int task_blocks_on_rt_mutex(struct rt_mutex *lock, + return -EDEADLK; + + raw_spin_lock(&task->pi_lock); ++ ++ /* ++ * In the case of futex requeue PI, this will be a proxy ++ * lock. The task will wake unaware that it is enqueueed on ++ * this lock. Avoid blocking on two locks and corrupting ++ * pi_blocked_on via the PI_WAKEUP_INPROGRESS ++ * flag. futex_wait_requeue_pi() sets this when it wakes up ++ * before requeue (due to a signal or timeout). Do not enqueue ++ * the task if PI_WAKEUP_INPROGRESS is set. ++ */ ++ if (task != current && task->pi_blocked_on == PI_WAKEUP_INPROGRESS) { ++ raw_spin_unlock(&task->pi_lock); ++ return -EAGAIN; ++ } ++ ++ BUG_ON(rt_mutex_real_waiter(task->pi_blocked_on)); ++ + __rt_mutex_adjust_prio(task); + waiter->task = task; + waiter->lock = lock; +@@ -930,7 +1421,7 @@ static int task_blocks_on_rt_mutex(struct rt_mutex *lock, + rt_mutex_enqueue_pi(owner, waiter); + + __rt_mutex_adjust_prio(owner); +- if (owner->pi_blocked_on) ++ if (rt_mutex_real_waiter(owner->pi_blocked_on)) + chain_walk = 1; + } else if (rt_mutex_cond_detect_deadlock(waiter, chwalk)) { + chain_walk = 1; +@@ -972,6 +1463,7 @@ static int task_blocks_on_rt_mutex(struct rt_mutex *lock, + * Called with lock->wait_lock held and interrupts disabled. + */ + static void mark_wakeup_next_waiter(struct wake_q_head *wake_q, ++ struct wake_q_head *wake_sleeper_q, + struct rt_mutex *lock) + { + struct rt_mutex_waiter *waiter; +@@ -1000,7 +1492,10 @@ static void mark_wakeup_next_waiter(struct wake_q_head *wake_q, + + raw_spin_unlock(¤t->pi_lock); + +- wake_q_add(wake_q, waiter->task); ++ if (waiter->savestate) ++ wake_q_add(wake_sleeper_q, waiter->task); ++ else ++ wake_q_add(wake_q, waiter->task); + } + + /* +@@ -1014,7 +1509,7 @@ static void remove_waiter(struct rt_mutex *lock, + { + bool is_top_waiter = (waiter == rt_mutex_top_waiter(lock)); + struct task_struct *owner = rt_mutex_owner(lock); +- struct rt_mutex *next_lock; ++ struct rt_mutex *next_lock = NULL; + + raw_spin_lock(¤t->pi_lock); + rt_mutex_dequeue(lock, waiter); +@@ -1038,7 +1533,8 @@ static void remove_waiter(struct rt_mutex *lock, + __rt_mutex_adjust_prio(owner); + + /* Store the lock on which owner is blocked or NULL */ +- next_lock = task_blocked_on_lock(owner); ++ if (rt_mutex_real_waiter(owner->pi_blocked_on)) ++ next_lock = task_blocked_on_lock(owner); + + raw_spin_unlock(&owner->pi_lock); + +@@ -1074,17 +1570,17 @@ void rt_mutex_adjust_pi(struct task_struct *task) + raw_spin_lock_irqsave(&task->pi_lock, flags); + + waiter = task->pi_blocked_on; +- if (!waiter || (waiter->prio == task->prio && ++ if (!rt_mutex_real_waiter(waiter) || (waiter->prio == task->prio && + !dl_prio(task->prio))) { + raw_spin_unlock_irqrestore(&task->pi_lock, flags); + return; + } + next_lock = waiter->lock; +- raw_spin_unlock_irqrestore(&task->pi_lock, flags); + + /* gets dropped in rt_mutex_adjust_prio_chain()! */ + get_task_struct(task); + ++ raw_spin_unlock_irqrestore(&task->pi_lock, flags); + rt_mutex_adjust_prio_chain(task, RT_MUTEX_MIN_CHAINWALK, NULL, + next_lock, NULL, task); + } +@@ -1102,7 +1598,8 @@ void rt_mutex_adjust_pi(struct task_struct *task) + static int __sched + __rt_mutex_slowlock(struct rt_mutex *lock, int state, + struct hrtimer_sleeper *timeout, +- struct rt_mutex_waiter *waiter) ++ struct rt_mutex_waiter *waiter, ++ struct ww_acquire_ctx *ww_ctx) + { + int ret = 0; + +@@ -1125,6 +1622,12 @@ __rt_mutex_slowlock(struct rt_mutex *lock, int state, + break; + } + ++ if (ww_ctx && ww_ctx->acquired > 0) { ++ ret = __mutex_lock_check_stamp(lock, ww_ctx); ++ if (ret) ++ break; ++ } ++ + raw_spin_unlock_irq(&lock->wait_lock); + + debug_rt_mutex_print_deadlock(waiter); +@@ -1159,21 +1662,96 @@ static void rt_mutex_handle_deadlock(int res, int detect_deadlock, + } + } + ++static __always_inline void ww_mutex_lock_acquired(struct ww_mutex *ww, ++ struct ww_acquire_ctx *ww_ctx) ++{ ++#ifdef CONFIG_DEBUG_MUTEXES ++ /* ++ * If this WARN_ON triggers, you used ww_mutex_lock to acquire, ++ * but released with a normal mutex_unlock in this call. ++ * ++ * This should never happen, always use ww_mutex_unlock. ++ */ ++ DEBUG_LOCKS_WARN_ON(ww->ctx); ++ ++ /* ++ * Not quite done after calling ww_acquire_done() ? ++ */ ++ DEBUG_LOCKS_WARN_ON(ww_ctx->done_acquire); ++ ++ if (ww_ctx->contending_lock) { ++ /* ++ * After -EDEADLK you tried to ++ * acquire a different ww_mutex? Bad! ++ */ ++ DEBUG_LOCKS_WARN_ON(ww_ctx->contending_lock != ww); ++ ++ /* ++ * You called ww_mutex_lock after receiving -EDEADLK, ++ * but 'forgot' to unlock everything else first? ++ */ ++ DEBUG_LOCKS_WARN_ON(ww_ctx->acquired > 0); ++ ww_ctx->contending_lock = NULL; ++ } ++ ++ /* ++ * Naughty, using a different class will lead to undefined behavior! ++ */ ++ DEBUG_LOCKS_WARN_ON(ww_ctx->ww_class != ww->ww_class); ++#endif ++ ww_ctx->acquired++; ++} ++ ++#ifdef CONFIG_PREEMPT_RT_FULL ++static void ww_mutex_account_lock(struct rt_mutex *lock, ++ struct ww_acquire_ctx *ww_ctx) ++{ ++ struct ww_mutex *ww = container_of(lock, struct ww_mutex, base.lock); ++ struct rt_mutex_waiter *waiter, *n; ++ ++ /* ++ * This branch gets optimized out for the common case, ++ * and is only important for ww_mutex_lock. ++ */ ++ ww_mutex_lock_acquired(ww, ww_ctx); ++ ww->ctx = ww_ctx; ++ ++ /* ++ * Give any possible sleeping processes the chance to wake up, ++ * so they can recheck if they have to back off. ++ */ ++ rbtree_postorder_for_each_entry_safe(waiter, n, &lock->waiters, ++ tree_entry) { ++ /* XXX debug rt mutex waiter wakeup */ ++ ++ BUG_ON(waiter->lock != lock); ++ rt_mutex_wake_waiter(waiter); ++ } ++} ++ ++#else ++ ++static void ww_mutex_account_lock(struct rt_mutex *lock, ++ struct ww_acquire_ctx *ww_ctx) ++{ ++ BUG(); ++} ++#endif ++ + /* + * Slow path lock function: + */ + static int __sched + rt_mutex_slowlock(struct rt_mutex *lock, int state, + struct hrtimer_sleeper *timeout, +- enum rtmutex_chainwalk chwalk) ++ enum rtmutex_chainwalk chwalk, ++ struct ww_acquire_ctx *ww_ctx) + { + struct rt_mutex_waiter waiter; + unsigned long flags; + int ret = 0; + +- debug_rt_mutex_init_waiter(&waiter); +- RB_CLEAR_NODE(&waiter.pi_tree_entry); +- RB_CLEAR_NODE(&waiter.tree_entry); ++ rt_mutex_init_waiter(&waiter, false); + + /* + * Technically we could use raw_spin_[un]lock_irq() here, but this can +@@ -1187,6 +1765,8 @@ rt_mutex_slowlock(struct rt_mutex *lock, int state, + + /* Try to acquire the lock again: */ + if (try_to_take_rt_mutex(lock, current, NULL)) { ++ if (ww_ctx) ++ ww_mutex_account_lock(lock, ww_ctx); + raw_spin_unlock_irqrestore(&lock->wait_lock, flags); + return 0; + } +@@ -1201,13 +1781,23 @@ rt_mutex_slowlock(struct rt_mutex *lock, int state, + + if (likely(!ret)) + /* sleep on the mutex */ +- ret = __rt_mutex_slowlock(lock, state, timeout, &waiter); ++ ret = __rt_mutex_slowlock(lock, state, timeout, &waiter, ++ ww_ctx); ++ else if (ww_ctx) { ++ /* ww_mutex received EDEADLK, let it become EALREADY */ ++ ret = __mutex_lock_check_stamp(lock, ww_ctx); ++ BUG_ON(!ret); ++ } + + if (unlikely(ret)) { + __set_current_state(TASK_RUNNING); + if (rt_mutex_has_waiters(lock)) + remove_waiter(lock, &waiter); +- rt_mutex_handle_deadlock(ret, chwalk, &waiter); ++ /* ww_mutex want to report EDEADLK/EALREADY, let them */ ++ if (!ww_ctx) ++ rt_mutex_handle_deadlock(ret, chwalk, &waiter); ++ } else if (ww_ctx) { ++ ww_mutex_account_lock(lock, ww_ctx); + } + + /* +@@ -1267,7 +1857,8 @@ static inline int rt_mutex_slowtrylock(struct rt_mutex *lock) + * Return whether the current task needs to undo a potential priority boosting. + */ + static bool __sched rt_mutex_slowunlock(struct rt_mutex *lock, +- struct wake_q_head *wake_q) ++ struct wake_q_head *wake_q, ++ struct wake_q_head *wake_sleeper_q) + { + unsigned long flags; + +@@ -1323,7 +1914,7 @@ static bool __sched rt_mutex_slowunlock(struct rt_mutex *lock, + * + * Queue the next waiter for wakeup once we release the wait_lock. + */ +- mark_wakeup_next_waiter(wake_q, lock); ++ mark_wakeup_next_waiter(wake_q, wake_sleeper_q, lock); + + raw_spin_unlock_irqrestore(&lock->wait_lock, flags); + +@@ -1339,31 +1930,36 @@ static bool __sched rt_mutex_slowunlock(struct rt_mutex *lock, + */ + static inline int + rt_mutex_fastlock(struct rt_mutex *lock, int state, ++ struct ww_acquire_ctx *ww_ctx, + int (*slowfn)(struct rt_mutex *lock, int state, + struct hrtimer_sleeper *timeout, +- enum rtmutex_chainwalk chwalk)) ++ enum rtmutex_chainwalk chwalk, ++ struct ww_acquire_ctx *ww_ctx)) + { + if (likely(rt_mutex_cmpxchg_acquire(lock, NULL, current))) { + rt_mutex_deadlock_account_lock(lock, current); + return 0; + } else +- return slowfn(lock, state, NULL, RT_MUTEX_MIN_CHAINWALK); ++ return slowfn(lock, state, NULL, RT_MUTEX_MIN_CHAINWALK, ++ ww_ctx); + } + + static inline int + rt_mutex_timed_fastlock(struct rt_mutex *lock, int state, + struct hrtimer_sleeper *timeout, + enum rtmutex_chainwalk chwalk, ++ struct ww_acquire_ctx *ww_ctx, + int (*slowfn)(struct rt_mutex *lock, int state, + struct hrtimer_sleeper *timeout, +- enum rtmutex_chainwalk chwalk)) ++ enum rtmutex_chainwalk chwalk, ++ struct ww_acquire_ctx *ww_ctx)) + { + if (chwalk == RT_MUTEX_MIN_CHAINWALK && + likely(rt_mutex_cmpxchg_acquire(lock, NULL, current))) { + rt_mutex_deadlock_account_lock(lock, current); + return 0; + } else +- return slowfn(lock, state, timeout, chwalk); ++ return slowfn(lock, state, timeout, chwalk, ww_ctx); + } + + static inline int +@@ -1380,17 +1976,20 @@ rt_mutex_fasttrylock(struct rt_mutex *lock, + static inline void + rt_mutex_fastunlock(struct rt_mutex *lock, + bool (*slowfn)(struct rt_mutex *lock, +- struct wake_q_head *wqh)) ++ struct wake_q_head *wqh, ++ struct wake_q_head *wq_sleeper)) + { + WAKE_Q(wake_q); ++ WAKE_Q(wake_sleeper_q); + + if (likely(rt_mutex_cmpxchg_release(lock, current, NULL))) { + rt_mutex_deadlock_account_unlock(current); + + } else { +- bool deboost = slowfn(lock, &wake_q); ++ bool deboost = slowfn(lock, &wake_q, &wake_sleeper_q); + + wake_up_q(&wake_q); ++ wake_up_q_sleeper(&wake_sleeper_q); + + /* Undo pi boosting if necessary: */ + if (deboost) +@@ -1407,7 +2006,7 @@ void __sched rt_mutex_lock(struct rt_mutex *lock) + { + might_sleep(); + +- rt_mutex_fastlock(lock, TASK_UNINTERRUPTIBLE, rt_mutex_slowlock); ++ rt_mutex_fastlock(lock, TASK_UNINTERRUPTIBLE, NULL, rt_mutex_slowlock); + } + EXPORT_SYMBOL_GPL(rt_mutex_lock); + +@@ -1424,7 +2023,7 @@ int __sched rt_mutex_lock_interruptible(struct rt_mutex *lock) + { + might_sleep(); + +- return rt_mutex_fastlock(lock, TASK_INTERRUPTIBLE, rt_mutex_slowlock); ++ return rt_mutex_fastlock(lock, TASK_INTERRUPTIBLE, NULL, rt_mutex_slowlock); + } + EXPORT_SYMBOL_GPL(rt_mutex_lock_interruptible); + +@@ -1437,11 +2036,30 @@ int rt_mutex_timed_futex_lock(struct rt_mutex *lock, + might_sleep(); + + return rt_mutex_timed_fastlock(lock, TASK_INTERRUPTIBLE, timeout, +- RT_MUTEX_FULL_CHAINWALK, ++ RT_MUTEX_FULL_CHAINWALK, NULL, + rt_mutex_slowlock); + } + + /** ++ * rt_mutex_lock_killable - lock a rt_mutex killable ++ * ++ * @lock: the rt_mutex to be locked ++ * @detect_deadlock: deadlock detection on/off ++ * ++ * Returns: ++ * 0 on success ++ * -EINTR when interrupted by a signal ++ * -EDEADLK when the lock would deadlock (when deadlock detection is on) ++ */ ++int __sched rt_mutex_lock_killable(struct rt_mutex *lock) ++{ ++ might_sleep(); ++ ++ return rt_mutex_fastlock(lock, TASK_KILLABLE, NULL, rt_mutex_slowlock); ++} ++EXPORT_SYMBOL_GPL(rt_mutex_lock_killable); ++ ++/** + * rt_mutex_timed_lock - lock a rt_mutex interruptible + * the timeout structure is provided + * by the caller +@@ -1461,6 +2079,7 @@ rt_mutex_timed_lock(struct rt_mutex *lock, struct hrtimer_sleeper *timeout) + + return rt_mutex_timed_fastlock(lock, TASK_INTERRUPTIBLE, timeout, + RT_MUTEX_MIN_CHAINWALK, ++ NULL, + rt_mutex_slowlock); + } + EXPORT_SYMBOL_GPL(rt_mutex_timed_lock); +@@ -1478,7 +2097,11 @@ EXPORT_SYMBOL_GPL(rt_mutex_timed_lock); + */ + int __sched rt_mutex_trylock(struct rt_mutex *lock) + { ++#ifdef CONFIG_PREEMPT_RT_FULL ++ if (WARN_ON_ONCE(in_irq() || in_nmi())) ++#else + if (WARN_ON_ONCE(in_irq() || in_nmi() || in_serving_softirq())) ++#endif + return 0; + + return rt_mutex_fasttrylock(lock, rt_mutex_slowtrylock); +@@ -1504,13 +2127,14 @@ EXPORT_SYMBOL_GPL(rt_mutex_unlock); + * required or not. + */ + bool __sched rt_mutex_futex_unlock(struct rt_mutex *lock, +- struct wake_q_head *wqh) ++ struct wake_q_head *wqh, ++ struct wake_q_head *wq_sleeper) + { + if (likely(rt_mutex_cmpxchg_release(lock, current, NULL))) { + rt_mutex_deadlock_account_unlock(current); + return false; + } +- return rt_mutex_slowunlock(lock, wqh); ++ return rt_mutex_slowunlock(lock, wqh, wq_sleeper); + } + + /** +@@ -1543,13 +2167,12 @@ EXPORT_SYMBOL_GPL(rt_mutex_destroy); + void __rt_mutex_init(struct rt_mutex *lock, const char *name) + { + lock->owner = NULL; +- raw_spin_lock_init(&lock->wait_lock); + lock->waiters = RB_ROOT; + lock->waiters_leftmost = NULL; + + debug_rt_mutex_init(lock, name); + } +-EXPORT_SYMBOL_GPL(__rt_mutex_init); ++EXPORT_SYMBOL(__rt_mutex_init); + + /** + * rt_mutex_init_proxy_locked - initialize and lock a rt_mutex on behalf of a +@@ -1564,7 +2187,7 @@ EXPORT_SYMBOL_GPL(__rt_mutex_init); + void rt_mutex_init_proxy_locked(struct rt_mutex *lock, + struct task_struct *proxy_owner) + { +- __rt_mutex_init(lock, NULL); ++ rt_mutex_init(lock); + debug_rt_mutex_proxy_lock(lock, proxy_owner); + rt_mutex_set_owner(lock, proxy_owner); + rt_mutex_deadlock_account_lock(lock, proxy_owner); +@@ -1612,6 +2235,35 @@ int rt_mutex_start_proxy_lock(struct rt_mutex *lock, + return 1; + } + ++#ifdef CONFIG_PREEMPT_RT_FULL ++ /* ++ * In PREEMPT_RT there's an added race. ++ * If the task, that we are about to requeue, times out, ++ * it can set the PI_WAKEUP_INPROGRESS. This tells the requeue ++ * to skip this task. But right after the task sets ++ * its pi_blocked_on to PI_WAKEUP_INPROGRESS it can then ++ * block on the spin_lock(&hb->lock), which in RT is an rtmutex. ++ * This will replace the PI_WAKEUP_INPROGRESS with the actual ++ * lock that it blocks on. We *must not* place this task ++ * on this proxy lock in that case. ++ * ++ * To prevent this race, we first take the task's pi_lock ++ * and check if it has updated its pi_blocked_on. If it has, ++ * we assume that it woke up and we return -EAGAIN. ++ * Otherwise, we set the task's pi_blocked_on to ++ * PI_REQUEUE_INPROGRESS, so that if the task is waking up ++ * it will know that we are in the process of requeuing it. ++ */ ++ raw_spin_lock(&task->pi_lock); ++ if (task->pi_blocked_on) { ++ raw_spin_unlock(&task->pi_lock); ++ raw_spin_unlock_irq(&lock->wait_lock); ++ return -EAGAIN; ++ } ++ task->pi_blocked_on = PI_REQUEUE_INPROGRESS; ++ raw_spin_unlock(&task->pi_lock); ++#endif ++ + /* We enforce deadlock detection for futexes */ + ret = task_blocks_on_rt_mutex(lock, waiter, task, + RT_MUTEX_FULL_CHAINWALK); +@@ -1626,7 +2278,7 @@ int rt_mutex_start_proxy_lock(struct rt_mutex *lock, + ret = 0; + } + +- if (unlikely(ret)) ++ if (ret && rt_mutex_has_waiters(lock)) + remove_waiter(lock, waiter); + + raw_spin_unlock_irq(&lock->wait_lock); +@@ -1682,7 +2334,7 @@ int rt_mutex_finish_proxy_lock(struct rt_mutex *lock, + set_current_state(TASK_INTERRUPTIBLE); + + /* sleep on the mutex */ +- ret = __rt_mutex_slowlock(lock, TASK_INTERRUPTIBLE, to, waiter); ++ ret = __rt_mutex_slowlock(lock, TASK_INTERRUPTIBLE, to, waiter, NULL); + + if (unlikely(ret)) + remove_waiter(lock, waiter); +@@ -1697,3 +2349,89 @@ int rt_mutex_finish_proxy_lock(struct rt_mutex *lock, + + return ret; + } ++ ++static inline int ++ww_mutex_deadlock_injection(struct ww_mutex *lock, struct ww_acquire_ctx *ctx) ++{ ++#ifdef CONFIG_DEBUG_WW_MUTEX_SLOWPATH ++ unsigned tmp; ++ ++ if (ctx->deadlock_inject_countdown-- == 0) { ++ tmp = ctx->deadlock_inject_interval; ++ if (tmp > UINT_MAX/4) ++ tmp = UINT_MAX; ++ else ++ tmp = tmp*2 + tmp + tmp/2; ++ ++ ctx->deadlock_inject_interval = tmp; ++ ctx->deadlock_inject_countdown = tmp; ++ ctx->contending_lock = lock; ++ ++ ww_mutex_unlock(lock); ++ ++ return -EDEADLK; ++ } ++#endif ++ ++ return 0; ++} ++ ++#ifdef CONFIG_PREEMPT_RT_FULL ++int __sched ++__ww_mutex_lock_interruptible(struct ww_mutex *lock, struct ww_acquire_ctx *ww_ctx) ++{ ++ int ret; ++ ++ might_sleep(); ++ ++ mutex_acquire_nest(&lock->base.dep_map, 0, 0, &ww_ctx->dep_map, _RET_IP_); ++ ret = rt_mutex_slowlock(&lock->base.lock, TASK_INTERRUPTIBLE, NULL, 0, ww_ctx); ++ if (ret) ++ mutex_release(&lock->base.dep_map, 1, _RET_IP_); ++ else if (!ret && ww_ctx->acquired > 1) ++ return ww_mutex_deadlock_injection(lock, ww_ctx); ++ ++ return ret; ++} ++EXPORT_SYMBOL_GPL(__ww_mutex_lock_interruptible); ++ ++int __sched ++__ww_mutex_lock(struct ww_mutex *lock, struct ww_acquire_ctx *ww_ctx) ++{ ++ int ret; ++ ++ might_sleep(); ++ ++ mutex_acquire_nest(&lock->base.dep_map, 0, 0, &ww_ctx->dep_map, _RET_IP_); ++ ret = rt_mutex_slowlock(&lock->base.lock, TASK_UNINTERRUPTIBLE, NULL, 0, ww_ctx); ++ if (ret) ++ mutex_release(&lock->base.dep_map, 1, _RET_IP_); ++ else if (!ret && ww_ctx->acquired > 1) ++ return ww_mutex_deadlock_injection(lock, ww_ctx); ++ ++ return ret; ++} ++EXPORT_SYMBOL_GPL(__ww_mutex_lock); ++ ++void __sched ww_mutex_unlock(struct ww_mutex *lock) ++{ ++ int nest = !!lock->ctx; ++ ++ /* ++ * The unlocking fastpath is the 0->1 transition from 'locked' ++ * into 'unlocked' state: ++ */ ++ if (nest) { ++#ifdef CONFIG_DEBUG_MUTEXES ++ DEBUG_LOCKS_WARN_ON(!lock->ctx->acquired); ++#endif ++ if (lock->ctx->acquired > 0) ++ lock->ctx->acquired--; ++ lock->ctx = NULL; ++ } ++ ++ mutex_release(&lock->base.dep_map, nest, _RET_IP_); ++ rt_mutex_unlock(&lock->base.lock); ++} ++EXPORT_SYMBOL(ww_mutex_unlock); ++#endif +diff --git a/kernel/locking/rtmutex_common.h b/kernel/locking/rtmutex_common.h +index 4f5f83c7d2d3..289f062f26cd 100644 +--- a/kernel/locking/rtmutex_common.h ++++ b/kernel/locking/rtmutex_common.h +@@ -27,6 +27,7 @@ struct rt_mutex_waiter { + struct rb_node pi_tree_entry; + struct task_struct *task; + struct rt_mutex *lock; ++ bool savestate; + #ifdef CONFIG_DEBUG_RT_MUTEXES + unsigned long ip; + struct pid *deadlock_task_pid; +@@ -97,6 +98,9 @@ enum rtmutex_chainwalk { + /* + * PI-futex support (proxy locking functions, etc.): + */ ++#define PI_WAKEUP_INPROGRESS ((struct rt_mutex_waiter *) 1) ++#define PI_REQUEUE_INPROGRESS ((struct rt_mutex_waiter *) 2) ++ + extern struct task_struct *rt_mutex_next_owner(struct rt_mutex *lock); + extern void rt_mutex_init_proxy_locked(struct rt_mutex *lock, + struct task_struct *proxy_owner); +@@ -110,7 +114,8 @@ extern int rt_mutex_finish_proxy_lock(struct rt_mutex *lock, + struct rt_mutex_waiter *waiter); + extern int rt_mutex_timed_futex_lock(struct rt_mutex *l, struct hrtimer_sleeper *to); + extern bool rt_mutex_futex_unlock(struct rt_mutex *lock, +- struct wake_q_head *wqh); ++ struct wake_q_head *wqh, ++ struct wake_q_head *wq_sleeper); + extern void rt_mutex_adjust_prio(struct task_struct *task); + + #ifdef CONFIG_DEBUG_RT_MUTEXES +@@ -119,4 +124,14 @@ extern void rt_mutex_adjust_prio(struct task_struct *task); + # include "rtmutex.h" + #endif + ++static inline void ++rt_mutex_init_waiter(struct rt_mutex_waiter *waiter, bool savestate) ++{ ++ debug_rt_mutex_init_waiter(waiter); ++ waiter->task = NULL; ++ waiter->savestate = savestate; ++ RB_CLEAR_NODE(&waiter->pi_tree_entry); ++ RB_CLEAR_NODE(&waiter->tree_entry); ++} ++ + #endif +diff --git a/kernel/locking/spinlock.c b/kernel/locking/spinlock.c +index db3ccb1dd614..909779647bd1 100644 +--- a/kernel/locking/spinlock.c ++++ b/kernel/locking/spinlock.c +@@ -124,8 +124,11 @@ void __lockfunc __raw_##op##_lock_bh(locktype##_t *lock) \ + * __[spin|read|write]_lock_bh() + */ + BUILD_LOCK_OPS(spin, raw_spinlock); ++ ++#ifndef CONFIG_PREEMPT_RT_FULL + BUILD_LOCK_OPS(read, rwlock); + BUILD_LOCK_OPS(write, rwlock); ++#endif + + #endif + +@@ -209,6 +212,8 @@ void __lockfunc _raw_spin_unlock_bh(raw_spinlock_t *lock) + EXPORT_SYMBOL(_raw_spin_unlock_bh); + #endif + ++#ifndef CONFIG_PREEMPT_RT_FULL ++ + #ifndef CONFIG_INLINE_READ_TRYLOCK + int __lockfunc _raw_read_trylock(rwlock_t *lock) + { +@@ -353,6 +358,8 @@ void __lockfunc _raw_write_unlock_bh(rwlock_t *lock) + EXPORT_SYMBOL(_raw_write_unlock_bh); + #endif + ++#endif /* !PREEMPT_RT_FULL */ ++ + #ifdef CONFIG_DEBUG_LOCK_ALLOC + + void __lockfunc _raw_spin_lock_nested(raw_spinlock_t *lock, int subclass) +diff --git a/kernel/locking/spinlock_debug.c b/kernel/locking/spinlock_debug.c +index 0374a596cffa..94970338d518 100644 +--- a/kernel/locking/spinlock_debug.c ++++ b/kernel/locking/spinlock_debug.c +@@ -31,6 +31,7 @@ void __raw_spin_lock_init(raw_spinlock_t *lock, const char *name, + + EXPORT_SYMBOL(__raw_spin_lock_init); + ++#ifndef CONFIG_PREEMPT_RT_FULL + void __rwlock_init(rwlock_t *lock, const char *name, + struct lock_class_key *key) + { +@@ -48,6 +49,7 @@ void __rwlock_init(rwlock_t *lock, const char *name, + } + + EXPORT_SYMBOL(__rwlock_init); ++#endif + + static void spin_dump(raw_spinlock_t *lock, const char *msg) + { +@@ -159,6 +161,7 @@ void do_raw_spin_unlock(raw_spinlock_t *lock) + arch_spin_unlock(&lock->raw_lock); + } + ++#ifndef CONFIG_PREEMPT_RT_FULL + static void rwlock_bug(rwlock_t *lock, const char *msg) + { + if (!debug_locks_off()) +@@ -300,3 +303,5 @@ void do_raw_write_unlock(rwlock_t *lock) + debug_write_unlock(lock); + arch_write_unlock(&lock->raw_lock); + } ++ ++#endif +diff --git a/kernel/panic.c b/kernel/panic.c +index ca8cea1ef673..6b698115f003 100644 +--- a/kernel/panic.c ++++ b/kernel/panic.c +@@ -449,9 +449,11 @@ static u64 oops_id; + + static int init_oops_id(void) + { ++#ifndef CONFIG_PREEMPT_RT_FULL + if (!oops_id) + get_random_bytes(&oops_id, sizeof(oops_id)); + else ++#endif + oops_id++; + + return 0; +diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c +index 33c79b6105c5..f53375bc77df 100644 +--- a/kernel/power/hibernate.c ++++ b/kernel/power/hibernate.c +@@ -286,6 +286,8 @@ static int create_image(int platform_mode) + + local_irq_disable(); + ++ system_state = SYSTEM_SUSPEND; ++ + error = syscore_suspend(); + if (error) { + printk(KERN_ERR "PM: Some system devices failed to power down, " +@@ -315,6 +317,7 @@ static int create_image(int platform_mode) + syscore_resume(); + + Enable_irqs: ++ system_state = SYSTEM_RUNNING; + local_irq_enable(); + + Enable_cpus: +@@ -444,6 +447,7 @@ static int resume_target_kernel(bool platform_mode) + goto Enable_cpus; + + local_irq_disable(); ++ system_state = SYSTEM_SUSPEND; + + error = syscore_suspend(); + if (error) +@@ -477,6 +481,7 @@ static int resume_target_kernel(bool platform_mode) + syscore_resume(); + + Enable_irqs: ++ system_state = SYSTEM_RUNNING; + local_irq_enable(); + + Enable_cpus: +@@ -562,6 +567,7 @@ int hibernation_platform_enter(void) + goto Enable_cpus; + + local_irq_disable(); ++ system_state = SYSTEM_SUSPEND; + syscore_suspend(); + if (pm_wakeup_pending()) { + error = -EAGAIN; +@@ -574,6 +580,7 @@ int hibernation_platform_enter(void) + + Power_up: + syscore_resume(); ++ system_state = SYSTEM_RUNNING; + local_irq_enable(); + + Enable_cpus: +@@ -674,6 +681,10 @@ static int load_image_and_restore(void) + return error; + } + ++#ifndef CONFIG_SUSPEND ++bool pm_in_action; ++#endif ++ + /** + * hibernate - Carry out system hibernation, including saving the image. + */ +@@ -687,6 +698,8 @@ int hibernate(void) + return -EPERM; + } + ++ pm_in_action = true; ++ + lock_system_sleep(); + /* The snapshot device should not be opened while we're running */ + if (!atomic_add_unless(&snapshot_device_available, -1, 0)) { +@@ -764,6 +777,7 @@ int hibernate(void) + atomic_inc(&snapshot_device_available); + Unlock: + unlock_system_sleep(); ++ pm_in_action = false; + return error; + } + +diff --git a/kernel/power/suspend.c b/kernel/power/suspend.c +index 0acab9d7f96f..aac06aad757c 100644 +--- a/kernel/power/suspend.c ++++ b/kernel/power/suspend.c +@@ -361,6 +361,8 @@ static int suspend_enter(suspend_state_t state, bool *wakeup) + arch_suspend_disable_irqs(); + BUG_ON(!irqs_disabled()); + ++ system_state = SYSTEM_SUSPEND; ++ + error = syscore_suspend(); + if (!error) { + *wakeup = pm_wakeup_pending(); +@@ -377,6 +379,8 @@ static int suspend_enter(suspend_state_t state, bool *wakeup) + syscore_resume(); + } + ++ system_state = SYSTEM_RUNNING; ++ + arch_suspend_enable_irqs(); + BUG_ON(irqs_disabled()); + +@@ -519,6 +523,8 @@ static int enter_state(suspend_state_t state) + return error; + } + ++bool pm_in_action; ++ + /** + * pm_suspend - Externally visible function for suspending the system. + * @state: System sleep state to enter. +@@ -533,6 +539,8 @@ int pm_suspend(suspend_state_t state) + if (state <= PM_SUSPEND_ON || state >= PM_SUSPEND_MAX) + return -EINVAL; + ++ pm_in_action = true; ++ + error = enter_state(state); + if (error) { + suspend_stats.fail++; +@@ -540,6 +548,7 @@ int pm_suspend(suspend_state_t state) + } else { + suspend_stats.success++; + } ++ pm_in_action = false; + return error; + } + EXPORT_SYMBOL(pm_suspend); +diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c +index eea6dbc2d8cf..6f01c7ecb45e 100644 +--- a/kernel/printk/printk.c ++++ b/kernel/printk/printk.c +@@ -351,6 +351,65 @@ __packed __aligned(4) + */ + DEFINE_RAW_SPINLOCK(logbuf_lock); + ++#ifdef CONFIG_EARLY_PRINTK ++struct console *early_console; ++ ++static void early_vprintk(const char *fmt, va_list ap) ++{ ++ if (early_console) { ++ char buf[512]; ++ int n = vscnprintf(buf, sizeof(buf), fmt, ap); ++ ++ early_console->write(early_console, buf, n); ++ } ++} ++ ++asmlinkage void early_printk(const char *fmt, ...) ++{ ++ va_list ap; ++ ++ va_start(ap, fmt); ++ early_vprintk(fmt, ap); ++ va_end(ap); ++} ++ ++/* ++ * This is independent of any log levels - a global ++ * kill switch that turns off all of printk. ++ * ++ * Used by the NMI watchdog if early-printk is enabled. ++ */ ++static bool __read_mostly printk_killswitch; ++ ++static int __init force_early_printk_setup(char *str) ++{ ++ printk_killswitch = true; ++ return 0; ++} ++early_param("force_early_printk", force_early_printk_setup); ++ ++void printk_kill(void) ++{ ++ printk_killswitch = true; ++} ++ ++#ifdef CONFIG_PRINTK ++static int forced_early_printk(const char *fmt, va_list ap) ++{ ++ if (!printk_killswitch) ++ return 0; ++ early_vprintk(fmt, ap); ++ return 1; ++} ++#endif ++ ++#else ++static inline int forced_early_printk(const char *fmt, va_list ap) ++{ ++ return 0; ++} ++#endif ++ + #ifdef CONFIG_PRINTK + DECLARE_WAIT_QUEUE_HEAD(log_wait); + /* the next printk record to read by syslog(READ) or /proc/kmsg */ +@@ -1340,6 +1399,7 @@ static int syslog_print_all(char __user *buf, int size, bool clear) + { + char *text; + int len = 0; ++ int attempts = 0; + + text = kmalloc(LOG_LINE_MAX + PREFIX_MAX, GFP_KERNEL); + if (!text) +@@ -1351,6 +1411,14 @@ static int syslog_print_all(char __user *buf, int size, bool clear) + u64 seq; + u32 idx; + enum log_flags prev; ++ int num_msg; ++try_again: ++ attempts++; ++ if (attempts > 10) { ++ len = -EBUSY; ++ goto out; ++ } ++ num_msg = 0; + + /* + * Find first record that fits, including all following records, +@@ -1366,6 +1434,14 @@ static int syslog_print_all(char __user *buf, int size, bool clear) + prev = msg->flags; + idx = log_next(idx); + seq++; ++ num_msg++; ++ if (num_msg > 5) { ++ num_msg = 0; ++ raw_spin_unlock_irq(&logbuf_lock); ++ raw_spin_lock_irq(&logbuf_lock); ++ if (clear_seq < log_first_seq) ++ goto try_again; ++ } + } + + /* move first record forward until length fits into the buffer */ +@@ -1379,6 +1455,14 @@ static int syslog_print_all(char __user *buf, int size, bool clear) + prev = msg->flags; + idx = log_next(idx); + seq++; ++ num_msg++; ++ if (num_msg > 5) { ++ num_msg = 0; ++ raw_spin_unlock_irq(&logbuf_lock); ++ raw_spin_lock_irq(&logbuf_lock); ++ if (clear_seq < log_first_seq) ++ goto try_again; ++ } + } + + /* last message fitting into this dump */ +@@ -1419,6 +1503,7 @@ static int syslog_print_all(char __user *buf, int size, bool clear) + clear_seq = log_next_seq; + clear_idx = log_next_idx; + } ++out: + raw_spin_unlock_irq(&logbuf_lock); + + kfree(text); +@@ -1572,6 +1657,12 @@ static void call_console_drivers(int level, + if (!console_drivers) + return; + ++ if (IS_ENABLED(CONFIG_PREEMPT_RT_BASE)) { ++ if (in_irq() || in_nmi()) ++ return; ++ } ++ ++ migrate_disable(); + for_each_console(con) { + if (exclusive_console && con != exclusive_console) + continue; +@@ -1587,6 +1678,7 @@ static void call_console_drivers(int level, + else + con->write(con, text, len); + } ++ migrate_enable(); + } + + /* +@@ -1750,6 +1842,13 @@ asmlinkage int vprintk_emit(int facility, int level, + /* cpu currently holding logbuf_lock in this function */ + static unsigned int logbuf_cpu = UINT_MAX; + ++ /* ++ * Fall back to early_printk if a debugging subsystem has ++ * killed printk output ++ */ ++ if (unlikely(forced_early_printk(fmt, args))) ++ return 1; ++ + if (level == LOGLEVEL_SCHED) { + level = LOGLEVEL_DEFAULT; + in_sched = true; +@@ -1894,13 +1993,23 @@ asmlinkage int vprintk_emit(int facility, int level, + + /* If called from the scheduler, we can not call up(). */ + if (!in_sched) { ++ int may_trylock = 1; ++ + lockdep_off(); ++#ifdef CONFIG_PREEMPT_RT_FULL ++ /* ++ * we can't take a sleeping lock with IRQs or preeption disabled ++ * so we can't print in these contexts ++ */ ++ if (!(preempt_count() == 0 && !irqs_disabled())) ++ may_trylock = 0; ++#endif + /* + * Try to acquire and then immediately release the console + * semaphore. The release will print out buffers and wake up + * /dev/kmsg and syslog() users. + */ +- if (console_trylock()) ++ if (may_trylock && console_trylock()) + console_unlock(); + lockdep_on(); + } +@@ -2023,26 +2132,6 @@ DEFINE_PER_CPU(printk_func_t, printk_func); + + #endif /* CONFIG_PRINTK */ + +-#ifdef CONFIG_EARLY_PRINTK +-struct console *early_console; +- +-asmlinkage __visible void early_printk(const char *fmt, ...) +-{ +- va_list ap; +- char buf[512]; +- int n; +- +- if (!early_console) +- return; +- +- va_start(ap, fmt); +- n = vscnprintf(buf, sizeof(buf), fmt, ap); +- va_end(ap); +- +- early_console->write(early_console, buf, n); +-} +-#endif +- + static int __add_preferred_console(char *name, int idx, char *options, + char *brl_options) + { +@@ -2312,11 +2401,16 @@ static void console_cont_flush(char *text, size_t size) + goto out; + + len = cont_print_text(text, size); ++#ifdef CONFIG_PREEMPT_RT_FULL ++ raw_spin_unlock_irqrestore(&logbuf_lock, flags); ++ call_console_drivers(cont.level, NULL, 0, text, len); ++#else + raw_spin_unlock(&logbuf_lock); + stop_critical_timings(); + call_console_drivers(cont.level, NULL, 0, text, len); + start_critical_timings(); + local_irq_restore(flags); ++#endif + return; + out: + raw_spin_unlock_irqrestore(&logbuf_lock, flags); +@@ -2440,13 +2534,17 @@ void console_unlock(void) + console_idx = log_next(console_idx); + console_seq++; + console_prev = msg->flags; ++#ifdef CONFIG_PREEMPT_RT_FULL ++ raw_spin_unlock_irqrestore(&logbuf_lock, flags); ++ call_console_drivers(level, ext_text, ext_len, text, len); ++#else + raw_spin_unlock(&logbuf_lock); + + stop_critical_timings(); /* don't trace print latency */ + call_console_drivers(level, ext_text, ext_len, text, len); + start_critical_timings(); + local_irq_restore(flags); +- ++#endif + if (do_cond_resched) + cond_resched(); + } +@@ -2498,6 +2596,11 @@ void console_unblank(void) + { + struct console *c; + ++ if (IS_ENABLED(CONFIG_PREEMPT_RT_BASE)) { ++ if (in_irq() || in_nmi()) ++ return; ++ } ++ + /* + * console_unblank can no longer be called in interrupt context unless + * oops_in_progress is set to 1.. +diff --git a/kernel/ptrace.c b/kernel/ptrace.c +index 1d3b7665d0be..ce666639789d 100644 +--- a/kernel/ptrace.c ++++ b/kernel/ptrace.c +@@ -128,7 +128,14 @@ static bool ptrace_freeze_traced(struct task_struct *task) + + spin_lock_irq(&task->sighand->siglock); + if (task_is_traced(task) && !__fatal_signal_pending(task)) { +- task->state = __TASK_TRACED; ++ unsigned long flags; ++ ++ raw_spin_lock_irqsave(&task->pi_lock, flags); ++ if (task->state & __TASK_TRACED) ++ task->state = __TASK_TRACED; ++ else ++ task->saved_state = __TASK_TRACED; ++ raw_spin_unlock_irqrestore(&task->pi_lock, flags); + ret = true; + } + spin_unlock_irq(&task->sighand->siglock); +diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c +index 971e2b138063..a304670fb917 100644 +--- a/kernel/rcu/rcutorture.c ++++ b/kernel/rcu/rcutorture.c +@@ -404,6 +404,7 @@ static struct rcu_torture_ops rcu_ops = { + .name = "rcu" + }; + ++#ifndef CONFIG_PREEMPT_RT_FULL + /* + * Definitions for rcu_bh torture testing. + */ +@@ -443,6 +444,12 @@ static struct rcu_torture_ops rcu_bh_ops = { + .name = "rcu_bh" + }; + ++#else ++static struct rcu_torture_ops rcu_bh_ops = { ++ .ttype = INVALID_RCU_FLAVOR, ++}; ++#endif ++ + /* + * Don't even think about trying any of these in real life!!! + * The names includes "busted", and they really means it! +diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c +index 5d80925e7fc8..2b4bc2b2c25a 100644 +--- a/kernel/rcu/tree.c ++++ b/kernel/rcu/tree.c +@@ -56,6 +56,11 @@ + #include <linux/random.h> + #include <linux/trace_events.h> + #include <linux/suspend.h> ++#include <linux/delay.h> ++#include <linux/gfp.h> ++#include <linux/oom.h> ++#include <linux/smpboot.h> ++#include "../time/tick-internal.h" + + #include "tree.h" + #include "rcu.h" +@@ -259,6 +264,19 @@ void rcu_sched_qs(void) + this_cpu_ptr(&rcu_sched_data), true); + } + ++#ifdef CONFIG_PREEMPT_RT_FULL ++static void rcu_preempt_qs(void); ++ ++void rcu_bh_qs(void) ++{ ++ unsigned long flags; ++ ++ /* Callers to this function, rcu_preempt_qs(), must disable irqs. */ ++ local_irq_save(flags); ++ rcu_preempt_qs(); ++ local_irq_restore(flags); ++} ++#else + void rcu_bh_qs(void) + { + if (__this_cpu_read(rcu_bh_data.cpu_no_qs.s)) { +@@ -268,6 +286,7 @@ void rcu_bh_qs(void) + __this_cpu_write(rcu_bh_data.cpu_no_qs.b.norm, false); + } + } ++#endif + + static DEFINE_PER_CPU(int, rcu_sched_qs_mask); + +@@ -448,11 +467,13 @@ EXPORT_SYMBOL_GPL(rcu_batches_started_sched); + /* + * Return the number of RCU BH batches started thus far for debug & stats. + */ ++#ifndef CONFIG_PREEMPT_RT_FULL + unsigned long rcu_batches_started_bh(void) + { + return rcu_bh_state.gpnum; + } + EXPORT_SYMBOL_GPL(rcu_batches_started_bh); ++#endif + + /* + * Return the number of RCU batches completed thus far for debug & stats. +@@ -472,6 +493,7 @@ unsigned long rcu_batches_completed_sched(void) + } + EXPORT_SYMBOL_GPL(rcu_batches_completed_sched); + ++#ifndef CONFIG_PREEMPT_RT_FULL + /* + * Return the number of RCU BH batches completed thus far for debug & stats. + */ +@@ -480,6 +502,7 @@ unsigned long rcu_batches_completed_bh(void) + return rcu_bh_state.completed; + } + EXPORT_SYMBOL_GPL(rcu_batches_completed_bh); ++#endif + + /* + * Return the number of RCU expedited batches completed thus far for +@@ -503,6 +526,7 @@ unsigned long rcu_exp_batches_completed_sched(void) + } + EXPORT_SYMBOL_GPL(rcu_exp_batches_completed_sched); + ++#ifndef CONFIG_PREEMPT_RT_FULL + /* + * Force a quiescent state. + */ +@@ -521,6 +545,13 @@ void rcu_bh_force_quiescent_state(void) + } + EXPORT_SYMBOL_GPL(rcu_bh_force_quiescent_state); + ++#else ++void rcu_force_quiescent_state(void) ++{ ++} ++EXPORT_SYMBOL_GPL(rcu_force_quiescent_state); ++#endif ++ + /* + * Force a quiescent state for RCU-sched. + */ +@@ -571,9 +602,11 @@ void rcutorture_get_gp_data(enum rcutorture_type test_type, int *flags, + case RCU_FLAVOR: + rsp = rcu_state_p; + break; ++#ifndef CONFIG_PREEMPT_RT_FULL + case RCU_BH_FLAVOR: + rsp = &rcu_bh_state; + break; ++#endif + case RCU_SCHED_FLAVOR: + rsp = &rcu_sched_state; + break; +@@ -3013,18 +3046,17 @@ __rcu_process_callbacks(struct rcu_state *rsp) + /* + * Do RCU core processing for the current CPU. + */ +-static void rcu_process_callbacks(struct softirq_action *unused) ++static void rcu_process_callbacks(void) + { + struct rcu_state *rsp; + + if (cpu_is_offline(smp_processor_id())) + return; +- trace_rcu_utilization(TPS("Start RCU core")); + for_each_rcu_flavor(rsp) + __rcu_process_callbacks(rsp); +- trace_rcu_utilization(TPS("End RCU core")); + } + ++static DEFINE_PER_CPU(struct task_struct *, rcu_cpu_kthread_task); + /* + * Schedule RCU callback invocation. If the specified type of RCU + * does not support RCU priority boosting, just do a direct call, +@@ -3036,19 +3068,106 @@ static void invoke_rcu_callbacks(struct rcu_state *rsp, struct rcu_data *rdp) + { + if (unlikely(!READ_ONCE(rcu_scheduler_fully_active))) + return; +- if (likely(!rsp->boost)) { +- rcu_do_batch(rsp, rdp); +- return; +- } +- invoke_rcu_callbacks_kthread(); ++ rcu_do_batch(rsp, rdp); + } + ++static void rcu_wake_cond(struct task_struct *t, int status) ++{ ++ /* ++ * If the thread is yielding, only wake it when this ++ * is invoked from idle ++ */ ++ if (t && (status != RCU_KTHREAD_YIELDING || is_idle_task(current))) ++ wake_up_process(t); ++} ++ ++/* ++ * Wake up this CPU's rcuc kthread to do RCU core processing. ++ */ + static void invoke_rcu_core(void) + { +- if (cpu_online(smp_processor_id())) +- raise_softirq(RCU_SOFTIRQ); ++ unsigned long flags; ++ struct task_struct *t; ++ ++ if (!cpu_online(smp_processor_id())) ++ return; ++ local_irq_save(flags); ++ __this_cpu_write(rcu_cpu_has_work, 1); ++ t = __this_cpu_read(rcu_cpu_kthread_task); ++ if (t != NULL && current != t) ++ rcu_wake_cond(t, __this_cpu_read(rcu_cpu_kthread_status)); ++ local_irq_restore(flags); + } + ++static void rcu_cpu_kthread_park(unsigned int cpu) ++{ ++ per_cpu(rcu_cpu_kthread_status, cpu) = RCU_KTHREAD_OFFCPU; ++} ++ ++static int rcu_cpu_kthread_should_run(unsigned int cpu) ++{ ++ return __this_cpu_read(rcu_cpu_has_work); ++} ++ ++/* ++ * Per-CPU kernel thread that invokes RCU callbacks. This replaces the ++ * RCU softirq used in flavors and configurations of RCU that do not ++ * support RCU priority boosting. ++ */ ++static void rcu_cpu_kthread(unsigned int cpu) ++{ ++ unsigned int *statusp = this_cpu_ptr(&rcu_cpu_kthread_status); ++ char work, *workp = this_cpu_ptr(&rcu_cpu_has_work); ++ int spincnt; ++ ++ for (spincnt = 0; spincnt < 10; spincnt++) { ++ trace_rcu_utilization(TPS("Start CPU kthread@rcu_wait")); ++ local_bh_disable(); ++ *statusp = RCU_KTHREAD_RUNNING; ++ this_cpu_inc(rcu_cpu_kthread_loops); ++ local_irq_disable(); ++ work = *workp; ++ *workp = 0; ++ local_irq_enable(); ++ if (work) ++ rcu_process_callbacks(); ++ local_bh_enable(); ++ if (*workp == 0) { ++ trace_rcu_utilization(TPS("End CPU kthread@rcu_wait")); ++ *statusp = RCU_KTHREAD_WAITING; ++ return; ++ } ++ } ++ *statusp = RCU_KTHREAD_YIELDING; ++ trace_rcu_utilization(TPS("Start CPU kthread@rcu_yield")); ++ schedule_timeout_interruptible(2); ++ trace_rcu_utilization(TPS("End CPU kthread@rcu_yield")); ++ *statusp = RCU_KTHREAD_WAITING; ++} ++ ++static struct smp_hotplug_thread rcu_cpu_thread_spec = { ++ .store = &rcu_cpu_kthread_task, ++ .thread_should_run = rcu_cpu_kthread_should_run, ++ .thread_fn = rcu_cpu_kthread, ++ .thread_comm = "rcuc/%u", ++ .setup = rcu_cpu_kthread_setup, ++ .park = rcu_cpu_kthread_park, ++}; ++ ++/* ++ * Spawn per-CPU RCU core processing kthreads. ++ */ ++static int __init rcu_spawn_core_kthreads(void) ++{ ++ int cpu; ++ ++ for_each_possible_cpu(cpu) ++ per_cpu(rcu_cpu_has_work, cpu) = 0; ++ BUG_ON(smpboot_register_percpu_thread(&rcu_cpu_thread_spec)); ++ return 0; ++} ++early_initcall(rcu_spawn_core_kthreads); ++ + /* + * Handle any core-RCU processing required by a call_rcu() invocation. + */ +@@ -3192,6 +3311,7 @@ void call_rcu_sched(struct rcu_head *head, rcu_callback_t func) + } + EXPORT_SYMBOL_GPL(call_rcu_sched); + ++#ifndef CONFIG_PREEMPT_RT_FULL + /* + * Queue an RCU callback for invocation after a quicker grace period. + */ +@@ -3200,6 +3320,7 @@ void call_rcu_bh(struct rcu_head *head, rcu_callback_t func) + __call_rcu(head, func, &rcu_bh_state, -1, 0); + } + EXPORT_SYMBOL_GPL(call_rcu_bh); ++#endif + + /* + * Queue an RCU callback for lazy invocation after a grace period. +@@ -3291,6 +3412,7 @@ void synchronize_sched(void) + } + EXPORT_SYMBOL_GPL(synchronize_sched); + ++#ifndef CONFIG_PREEMPT_RT_FULL + /** + * synchronize_rcu_bh - wait until an rcu_bh grace period has elapsed. + * +@@ -3317,6 +3439,7 @@ void synchronize_rcu_bh(void) + wait_rcu_gp(call_rcu_bh); + } + EXPORT_SYMBOL_GPL(synchronize_rcu_bh); ++#endif + + /** + * get_state_synchronize_rcu - Snapshot current RCU state +@@ -3695,6 +3818,7 @@ static void _rcu_barrier(struct rcu_state *rsp) + mutex_unlock(&rsp->barrier_mutex); + } + ++#ifndef CONFIG_PREEMPT_RT_FULL + /** + * rcu_barrier_bh - Wait until all in-flight call_rcu_bh() callbacks complete. + */ +@@ -3703,6 +3827,7 @@ void rcu_barrier_bh(void) + _rcu_barrier(&rcu_bh_state); + } + EXPORT_SYMBOL_GPL(rcu_barrier_bh); ++#endif + + /** + * rcu_barrier_sched - Wait for in-flight call_rcu_sched() callbacks. +@@ -4196,12 +4321,13 @@ void __init rcu_init(void) + + rcu_bootup_announce(); + rcu_init_geometry(); ++#ifndef CONFIG_PREEMPT_RT_FULL + rcu_init_one(&rcu_bh_state); ++#endif + rcu_init_one(&rcu_sched_state); + if (dump_tree) + rcu_dump_rcu_node_tree(&rcu_sched_state); + __rcu_init_preempt(); +- open_softirq(RCU_SOFTIRQ, rcu_process_callbacks); + + /* + * We don't need protection against CPU-hotplug here because +diff --git a/kernel/rcu/tree.h b/kernel/rcu/tree.h +index f714f873bf9d..71631196e66e 100644 +--- a/kernel/rcu/tree.h ++++ b/kernel/rcu/tree.h +@@ -587,18 +587,18 @@ extern struct list_head rcu_struct_flavors; + */ + extern struct rcu_state rcu_sched_state; + ++#ifndef CONFIG_PREEMPT_RT_FULL + extern struct rcu_state rcu_bh_state; ++#endif + + #ifdef CONFIG_PREEMPT_RCU + extern struct rcu_state rcu_preempt_state; + #endif /* #ifdef CONFIG_PREEMPT_RCU */ + +-#ifdef CONFIG_RCU_BOOST + DECLARE_PER_CPU(unsigned int, rcu_cpu_kthread_status); + DECLARE_PER_CPU(int, rcu_cpu_kthread_cpu); + DECLARE_PER_CPU(unsigned int, rcu_cpu_kthread_loops); + DECLARE_PER_CPU(char, rcu_cpu_has_work); +-#endif /* #ifdef CONFIG_RCU_BOOST */ + + #ifndef RCU_TREE_NONCORE + +@@ -618,10 +618,9 @@ void call_rcu(struct rcu_head *head, rcu_callback_t func); + static void __init __rcu_init_preempt(void); + static void rcu_initiate_boost(struct rcu_node *rnp, unsigned long flags); + static void rcu_preempt_boost_start_gp(struct rcu_node *rnp); +-static void invoke_rcu_callbacks_kthread(void); + static bool rcu_is_callbacks_kthread(void); ++static void rcu_cpu_kthread_setup(unsigned int cpu); + #ifdef CONFIG_RCU_BOOST +-static void rcu_preempt_do_callbacks(void); + static int rcu_spawn_one_boost_kthread(struct rcu_state *rsp, + struct rcu_node *rnp); + #endif /* #ifdef CONFIG_RCU_BOOST */ +diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h +index 0082fce402a0..e08cddadd9c7 100644 +--- a/kernel/rcu/tree_plugin.h ++++ b/kernel/rcu/tree_plugin.h +@@ -24,25 +24,10 @@ + * Paul E. McKenney <paulmck@linux.vnet.ibm.com> + */ + +-#include <linux/delay.h> +-#include <linux/gfp.h> +-#include <linux/oom.h> +-#include <linux/smpboot.h> +-#include "../time/tick-internal.h" +- + #ifdef CONFIG_RCU_BOOST + + #include "../locking/rtmutex_common.h" + +-/* +- * Control variables for per-CPU and per-rcu_node kthreads. These +- * handle all flavors of RCU. +- */ +-static DEFINE_PER_CPU(struct task_struct *, rcu_cpu_kthread_task); +-DEFINE_PER_CPU(unsigned int, rcu_cpu_kthread_status); +-DEFINE_PER_CPU(unsigned int, rcu_cpu_kthread_loops); +-DEFINE_PER_CPU(char, rcu_cpu_has_work); +- + #else /* #ifdef CONFIG_RCU_BOOST */ + + /* +@@ -55,6 +40,14 @@ DEFINE_PER_CPU(char, rcu_cpu_has_work); + + #endif /* #else #ifdef CONFIG_RCU_BOOST */ + ++/* ++ * Control variables for per-CPU and per-rcu_node kthreads. These ++ * handle all flavors of RCU. ++ */ ++DEFINE_PER_CPU(unsigned int, rcu_cpu_kthread_status); ++DEFINE_PER_CPU(unsigned int, rcu_cpu_kthread_loops); ++DEFINE_PER_CPU(char, rcu_cpu_has_work); ++ + #ifdef CONFIG_RCU_NOCB_CPU + static cpumask_var_t rcu_nocb_mask; /* CPUs to have callbacks offloaded. */ + static bool have_rcu_nocb_mask; /* Was rcu_nocb_mask allocated? */ +@@ -426,7 +419,7 @@ void rcu_read_unlock_special(struct task_struct *t) + } + + /* Hardware IRQ handlers cannot block, complain if they get here. */ +- if (in_irq() || in_serving_softirq()) { ++ if (preempt_count() & (HARDIRQ_MASK | SOFTIRQ_OFFSET)) { + lockdep_rcu_suspicious(__FILE__, __LINE__, + "rcu_read_unlock() from irq or softirq with blocking in critical section!!!\n"); + pr_alert("->rcu_read_unlock_special: %#x (b: %d, enq: %d nq: %d)\n", +@@ -632,15 +625,6 @@ static void rcu_preempt_check_callbacks(void) + t->rcu_read_unlock_special.b.need_qs = true; + } + +-#ifdef CONFIG_RCU_BOOST +- +-static void rcu_preempt_do_callbacks(void) +-{ +- rcu_do_batch(rcu_state_p, this_cpu_ptr(rcu_data_p)); +-} +- +-#endif /* #ifdef CONFIG_RCU_BOOST */ +- + /* + * Queue a preemptible-RCU callback for invocation after a grace period. + */ +@@ -829,6 +813,19 @@ void exit_rcu(void) + + #endif /* #else #ifdef CONFIG_PREEMPT_RCU */ + ++/* ++ * If boosting, set rcuc kthreads to realtime priority. ++ */ ++static void rcu_cpu_kthread_setup(unsigned int cpu) ++{ ++#ifdef CONFIG_RCU_BOOST ++ struct sched_param sp; ++ ++ sp.sched_priority = kthread_prio; ++ sched_setscheduler_nocheck(current, SCHED_FIFO, &sp); ++#endif /* #ifdef CONFIG_RCU_BOOST */ ++} ++ + #ifdef CONFIG_RCU_BOOST + + #include "../locking/rtmutex_common.h" +@@ -860,16 +857,6 @@ static void rcu_initiate_boost_trace(struct rcu_node *rnp) + + #endif /* #else #ifdef CONFIG_RCU_TRACE */ + +-static void rcu_wake_cond(struct task_struct *t, int status) +-{ +- /* +- * If the thread is yielding, only wake it when this +- * is invoked from idle +- */ +- if (status != RCU_KTHREAD_YIELDING || is_idle_task(current)) +- wake_up_process(t); +-} +- + /* + * Carry out RCU priority boosting on the task indicated by ->exp_tasks + * or ->boost_tasks, advancing the pointer to the next task in the +@@ -1013,23 +1000,6 @@ static void rcu_initiate_boost(struct rcu_node *rnp, unsigned long flags) + } + + /* +- * Wake up the per-CPU kthread to invoke RCU callbacks. +- */ +-static void invoke_rcu_callbacks_kthread(void) +-{ +- unsigned long flags; +- +- local_irq_save(flags); +- __this_cpu_write(rcu_cpu_has_work, 1); +- if (__this_cpu_read(rcu_cpu_kthread_task) != NULL && +- current != __this_cpu_read(rcu_cpu_kthread_task)) { +- rcu_wake_cond(__this_cpu_read(rcu_cpu_kthread_task), +- __this_cpu_read(rcu_cpu_kthread_status)); +- } +- local_irq_restore(flags); +-} +- +-/* + * Is the current CPU running the RCU-callbacks kthread? + * Caller must have preemption disabled. + */ +@@ -1083,67 +1053,6 @@ static int rcu_spawn_one_boost_kthread(struct rcu_state *rsp, + return 0; + } + +-static void rcu_kthread_do_work(void) +-{ +- rcu_do_batch(&rcu_sched_state, this_cpu_ptr(&rcu_sched_data)); +- rcu_do_batch(&rcu_bh_state, this_cpu_ptr(&rcu_bh_data)); +- rcu_preempt_do_callbacks(); +-} +- +-static void rcu_cpu_kthread_setup(unsigned int cpu) +-{ +- struct sched_param sp; +- +- sp.sched_priority = kthread_prio; +- sched_setscheduler_nocheck(current, SCHED_FIFO, &sp); +-} +- +-static void rcu_cpu_kthread_park(unsigned int cpu) +-{ +- per_cpu(rcu_cpu_kthread_status, cpu) = RCU_KTHREAD_OFFCPU; +-} +- +-static int rcu_cpu_kthread_should_run(unsigned int cpu) +-{ +- return __this_cpu_read(rcu_cpu_has_work); +-} +- +-/* +- * Per-CPU kernel thread that invokes RCU callbacks. This replaces the +- * RCU softirq used in flavors and configurations of RCU that do not +- * support RCU priority boosting. +- */ +-static void rcu_cpu_kthread(unsigned int cpu) +-{ +- unsigned int *statusp = this_cpu_ptr(&rcu_cpu_kthread_status); +- char work, *workp = this_cpu_ptr(&rcu_cpu_has_work); +- int spincnt; +- +- for (spincnt = 0; spincnt < 10; spincnt++) { +- trace_rcu_utilization(TPS("Start CPU kthread@rcu_wait")); +- local_bh_disable(); +- *statusp = RCU_KTHREAD_RUNNING; +- this_cpu_inc(rcu_cpu_kthread_loops); +- local_irq_disable(); +- work = *workp; +- *workp = 0; +- local_irq_enable(); +- if (work) +- rcu_kthread_do_work(); +- local_bh_enable(); +- if (*workp == 0) { +- trace_rcu_utilization(TPS("End CPU kthread@rcu_wait")); +- *statusp = RCU_KTHREAD_WAITING; +- return; +- } +- } +- *statusp = RCU_KTHREAD_YIELDING; +- trace_rcu_utilization(TPS("Start CPU kthread@rcu_yield")); +- schedule_timeout_interruptible(2); +- trace_rcu_utilization(TPS("End CPU kthread@rcu_yield")); +- *statusp = RCU_KTHREAD_WAITING; +-} +- + /* + * Set the per-rcu_node kthread's affinity to cover all CPUs that are + * served by the rcu_node in question. The CPU hotplug lock is still +@@ -1174,26 +1083,12 @@ static void rcu_boost_kthread_setaffinity(struct rcu_node *rnp, int outgoingcpu) + free_cpumask_var(cm); + } + +-static struct smp_hotplug_thread rcu_cpu_thread_spec = { +- .store = &rcu_cpu_kthread_task, +- .thread_should_run = rcu_cpu_kthread_should_run, +- .thread_fn = rcu_cpu_kthread, +- .thread_comm = "rcuc/%u", +- .setup = rcu_cpu_kthread_setup, +- .park = rcu_cpu_kthread_park, +-}; +- + /* + * Spawn boost kthreads -- called as soon as the scheduler is running. + */ + static void __init rcu_spawn_boost_kthreads(void) + { + struct rcu_node *rnp; +- int cpu; +- +- for_each_possible_cpu(cpu) +- per_cpu(rcu_cpu_has_work, cpu) = 0; +- BUG_ON(smpboot_register_percpu_thread(&rcu_cpu_thread_spec)); + rcu_for_each_leaf_node(rcu_state_p, rnp) + (void)rcu_spawn_one_boost_kthread(rcu_state_p, rnp); + } +@@ -1216,11 +1111,6 @@ static void rcu_initiate_boost(struct rcu_node *rnp, unsigned long flags) + raw_spin_unlock_irqrestore_rcu_node(rnp, flags); + } + +-static void invoke_rcu_callbacks_kthread(void) +-{ +- WARN_ON_ONCE(1); +-} +- + static bool rcu_is_callbacks_kthread(void) + { + return false; +@@ -1244,7 +1134,7 @@ static void rcu_prepare_kthreads(int cpu) + + #endif /* #else #ifdef CONFIG_RCU_BOOST */ + +-#if !defined(CONFIG_RCU_FAST_NO_HZ) ++#if !defined(CONFIG_RCU_FAST_NO_HZ) || defined(CONFIG_PREEMPT_RT_FULL) + + /* + * Check to see if any future RCU-related work will need to be done +@@ -1261,7 +1151,9 @@ int rcu_needs_cpu(u64 basemono, u64 *nextevt) + return IS_ENABLED(CONFIG_RCU_NOCB_CPU_ALL) + ? 0 : rcu_cpu_has_callbacks(NULL); + } ++#endif /* !defined(CONFIG_RCU_FAST_NO_HZ) || defined(CONFIG_PREEMPT_RT_FULL) */ + ++#if !defined(CONFIG_RCU_FAST_NO_HZ) + /* + * Because we do not have RCU_FAST_NO_HZ, don't bother cleaning up + * after it. +@@ -1357,6 +1249,8 @@ static bool __maybe_unused rcu_try_advance_all_cbs(void) + return cbs_ready; + } + ++#ifndef CONFIG_PREEMPT_RT_FULL ++ + /* + * Allow the CPU to enter dyntick-idle mode unless it has callbacks ready + * to invoke. If the CPU has callbacks, try to advance them. Tell the +@@ -1402,6 +1296,7 @@ int rcu_needs_cpu(u64 basemono, u64 *nextevt) + *nextevt = basemono + dj * TICK_NSEC; + return 0; + } ++#endif /* #ifndef CONFIG_PREEMPT_RT_FULL */ + + /* + * Prepare a CPU for idle from an RCU perspective. The first major task +diff --git a/kernel/rcu/update.c b/kernel/rcu/update.c +index f0d8322bc3ec..b40d3468ba4e 100644 +--- a/kernel/rcu/update.c ++++ b/kernel/rcu/update.c +@@ -295,6 +295,7 @@ int rcu_read_lock_held(void) + } + EXPORT_SYMBOL_GPL(rcu_read_lock_held); + ++#ifndef CONFIG_PREEMPT_RT_FULL + /** + * rcu_read_lock_bh_held() - might we be in RCU-bh read-side critical section? + * +@@ -321,6 +322,7 @@ int rcu_read_lock_bh_held(void) + return in_softirq() || irqs_disabled(); + } + EXPORT_SYMBOL_GPL(rcu_read_lock_bh_held); ++#endif + + #endif /* #ifdef CONFIG_DEBUG_LOCK_ALLOC */ + +diff --git a/kernel/relay.c b/kernel/relay.c +index d797502140b9..cf05c17ddbed 100644 +--- a/kernel/relay.c ++++ b/kernel/relay.c +@@ -336,6 +336,10 @@ static void wakeup_readers(unsigned long data) + { + struct rchan_buf *buf = (struct rchan_buf *)data; + wake_up_interruptible(&buf->read_wait); ++ /* ++ * Stupid polling for now: ++ */ ++ mod_timer(&buf->timer, jiffies + 1); + } + + /** +@@ -353,6 +357,7 @@ static void __relay_reset(struct rchan_buf *buf, unsigned int init) + init_waitqueue_head(&buf->read_wait); + kref_init(&buf->kref); + setup_timer(&buf->timer, wakeup_readers, (unsigned long)buf); ++ mod_timer(&buf->timer, jiffies + 1); + } else + del_timer_sync(&buf->timer); + +@@ -767,15 +772,6 @@ size_t relay_switch_subbuf(struct rchan_buf *buf, size_t length) + else + buf->early_bytes += buf->chan->subbuf_size - + buf->padding[old_subbuf]; +- smp_mb(); +- if (waitqueue_active(&buf->read_wait)) +- /* +- * Calling wake_up_interruptible() from here +- * will deadlock if we happen to be logging +- * from the scheduler (trying to re-grab +- * rq->lock), so defer it. +- */ +- mod_timer(&buf->timer, jiffies + 1); + } + + old = buf->data; +diff --git a/kernel/sched/Makefile b/kernel/sched/Makefile +index 5e59b832ae2b..7337a7f60e3f 100644 +--- a/kernel/sched/Makefile ++++ b/kernel/sched/Makefile +@@ -17,7 +17,7 @@ endif + + obj-y += core.o loadavg.o clock.o cputime.o + obj-y += idle_task.o fair.o rt.o deadline.o stop_task.o +-obj-y += wait.o swait.o completion.o idle.o ++obj-y += wait.o swait.o swork.o completion.o idle.o + obj-$(CONFIG_SMP) += cpupri.o cpudeadline.o + obj-$(CONFIG_SCHED_AUTOGROUP) += auto_group.o + obj-$(CONFIG_SCHEDSTATS) += stats.o +diff --git a/kernel/sched/completion.c b/kernel/sched/completion.c +index 8d0f35debf35..b62cf6400fe0 100644 +--- a/kernel/sched/completion.c ++++ b/kernel/sched/completion.c +@@ -30,10 +30,10 @@ void complete(struct completion *x) + { + unsigned long flags; + +- spin_lock_irqsave(&x->wait.lock, flags); ++ raw_spin_lock_irqsave(&x->wait.lock, flags); + x->done++; +- __wake_up_locked(&x->wait, TASK_NORMAL, 1); +- spin_unlock_irqrestore(&x->wait.lock, flags); ++ swake_up_locked(&x->wait); ++ raw_spin_unlock_irqrestore(&x->wait.lock, flags); + } + EXPORT_SYMBOL(complete); + +@@ -50,10 +50,10 @@ void complete_all(struct completion *x) + { + unsigned long flags; + +- spin_lock_irqsave(&x->wait.lock, flags); ++ raw_spin_lock_irqsave(&x->wait.lock, flags); + x->done += UINT_MAX/2; +- __wake_up_locked(&x->wait, TASK_NORMAL, 0); +- spin_unlock_irqrestore(&x->wait.lock, flags); ++ swake_up_all_locked(&x->wait); ++ raw_spin_unlock_irqrestore(&x->wait.lock, flags); + } + EXPORT_SYMBOL(complete_all); + +@@ -62,20 +62,20 @@ do_wait_for_common(struct completion *x, + long (*action)(long), long timeout, int state) + { + if (!x->done) { +- DECLARE_WAITQUEUE(wait, current); ++ DECLARE_SWAITQUEUE(wait); + +- __add_wait_queue_tail_exclusive(&x->wait, &wait); ++ __prepare_to_swait(&x->wait, &wait); + do { + if (signal_pending_state(state, current)) { + timeout = -ERESTARTSYS; + break; + } + __set_current_state(state); +- spin_unlock_irq(&x->wait.lock); ++ raw_spin_unlock_irq(&x->wait.lock); + timeout = action(timeout); +- spin_lock_irq(&x->wait.lock); ++ raw_spin_lock_irq(&x->wait.lock); + } while (!x->done && timeout); +- __remove_wait_queue(&x->wait, &wait); ++ __finish_swait(&x->wait, &wait); + if (!x->done) + return timeout; + } +@@ -89,9 +89,9 @@ __wait_for_common(struct completion *x, + { + might_sleep(); + +- spin_lock_irq(&x->wait.lock); ++ raw_spin_lock_irq(&x->wait.lock); + timeout = do_wait_for_common(x, action, timeout, state); +- spin_unlock_irq(&x->wait.lock); ++ raw_spin_unlock_irq(&x->wait.lock); + return timeout; + } + +@@ -277,12 +277,12 @@ bool try_wait_for_completion(struct completion *x) + if (!READ_ONCE(x->done)) + return 0; + +- spin_lock_irqsave(&x->wait.lock, flags); ++ raw_spin_lock_irqsave(&x->wait.lock, flags); + if (!x->done) + ret = 0; + else + x->done--; +- spin_unlock_irqrestore(&x->wait.lock, flags); ++ raw_spin_unlock_irqrestore(&x->wait.lock, flags); + return ret; + } + EXPORT_SYMBOL(try_wait_for_completion); +@@ -311,7 +311,7 @@ bool completion_done(struct completion *x) + * after it's acquired the lock. + */ + smp_rmb(); +- spin_unlock_wait(&x->wait.lock); ++ raw_spin_unlock_wait(&x->wait.lock); + return true; + } + EXPORT_SYMBOL(completion_done); +diff --git a/kernel/sched/core.c b/kernel/sched/core.c +index 44817c640e99..55aafcff5810 100644 +--- a/kernel/sched/core.c ++++ b/kernel/sched/core.c +@@ -129,7 +129,11 @@ const_debug unsigned int sysctl_sched_features = + * Number of tasks to iterate in a single balance run. + * Limited because this is done with IRQs disabled. + */ ++#ifndef CONFIG_PREEMPT_RT_FULL + const_debug unsigned int sysctl_sched_nr_migrate = 32; ++#else ++const_debug unsigned int sysctl_sched_nr_migrate = 8; ++#endif + + /* + * period over which we average the RT time consumption, measured +@@ -345,6 +349,7 @@ static void init_rq_hrtick(struct rq *rq) + + hrtimer_init(&rq->hrtick_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); + rq->hrtick_timer.function = hrtick; ++ rq->hrtick_timer.irqsafe = 1; + } + #else /* CONFIG_SCHED_HRTICK */ + static inline void hrtick_clear(struct rq *rq) +@@ -449,7 +454,7 @@ void wake_q_add(struct wake_q_head *head, struct task_struct *task) + head->lastp = &node->next; + } + +-void wake_up_q(struct wake_q_head *head) ++void __wake_up_q(struct wake_q_head *head, bool sleeper) + { + struct wake_q_node *node = head->first; + +@@ -466,7 +471,10 @@ void wake_up_q(struct wake_q_head *head) + * wake_up_process() implies a wmb() to pair with the queueing + * in wake_q_add() so as not to miss wakeups. + */ +- wake_up_process(task); ++ if (sleeper) ++ wake_up_lock_sleeper(task); ++ else ++ wake_up_process(task); + put_task_struct(task); + } + } +@@ -502,6 +510,38 @@ void resched_curr(struct rq *rq) + trace_sched_wake_idle_without_ipi(cpu); + } + ++#ifdef CONFIG_PREEMPT_LAZY ++void resched_curr_lazy(struct rq *rq) ++{ ++ struct task_struct *curr = rq->curr; ++ int cpu; ++ ++ if (!sched_feat(PREEMPT_LAZY)) { ++ resched_curr(rq); ++ return; ++ } ++ ++ lockdep_assert_held(&rq->lock); ++ ++ if (test_tsk_need_resched(curr)) ++ return; ++ ++ if (test_tsk_need_resched_lazy(curr)) ++ return; ++ ++ set_tsk_need_resched_lazy(curr); ++ ++ cpu = cpu_of(rq); ++ if (cpu == smp_processor_id()) ++ return; ++ ++ /* NEED_RESCHED_LAZY must be visible before we test polling */ ++ smp_mb(); ++ if (!tsk_is_polling(curr)) ++ smp_send_reschedule(cpu); ++} ++#endif ++ + void resched_cpu(int cpu) + { + struct rq *rq = cpu_rq(cpu); +@@ -525,11 +565,14 @@ void resched_cpu(int cpu) + */ + int get_nohz_timer_target(void) + { +- int i, cpu = smp_processor_id(); ++ int i, cpu; + struct sched_domain *sd; + ++ preempt_disable_rt(); ++ cpu = smp_processor_id(); ++ + if (!idle_cpu(cpu) && is_housekeeping_cpu(cpu)) +- return cpu; ++ goto preempt_en_rt; + + rcu_read_lock(); + for_each_domain(cpu, sd) { +@@ -548,6 +591,8 @@ int get_nohz_timer_target(void) + cpu = housekeeping_any_cpu(); + unlock: + rcu_read_unlock(); ++preempt_en_rt: ++ preempt_enable_rt(); + return cpu; + } + /* +@@ -1089,6 +1134,11 @@ void do_set_cpus_allowed(struct task_struct *p, const struct cpumask *new_mask) + + lockdep_assert_held(&p->pi_lock); + ++ if (__migrate_disabled(p)) { ++ cpumask_copy(&p->cpus_allowed, new_mask); ++ return; ++ } ++ + queued = task_on_rq_queued(p); + running = task_current(rq, p); + +@@ -1111,6 +1161,84 @@ void do_set_cpus_allowed(struct task_struct *p, const struct cpumask *new_mask) + enqueue_task(rq, p, ENQUEUE_RESTORE); + } + ++static DEFINE_PER_CPU(struct cpumask, sched_cpumasks); ++static DEFINE_MUTEX(sched_down_mutex); ++static cpumask_t sched_down_cpumask; ++ ++void tell_sched_cpu_down_begin(int cpu) ++{ ++ mutex_lock(&sched_down_mutex); ++ cpumask_set_cpu(cpu, &sched_down_cpumask); ++ mutex_unlock(&sched_down_mutex); ++} ++ ++void tell_sched_cpu_down_done(int cpu) ++{ ++ mutex_lock(&sched_down_mutex); ++ cpumask_clear_cpu(cpu, &sched_down_cpumask); ++ mutex_unlock(&sched_down_mutex); ++} ++ ++/** ++ * migrate_me - try to move the current task off this cpu ++ * ++ * Used by the pin_current_cpu() code to try to get tasks ++ * to move off the current CPU as it is going down. ++ * It will only move the task if the task isn't pinned to ++ * the CPU (with migrate_disable, affinity or NO_SETAFFINITY) ++ * and the task has to be in a RUNNING state. Otherwise the ++ * movement of the task will wake it up (change its state ++ * to running) when the task did not expect it. ++ * ++ * Returns 1 if it succeeded in moving the current task ++ * 0 otherwise. ++ */ ++int migrate_me(void) ++{ ++ struct task_struct *p = current; ++ struct migration_arg arg; ++ struct cpumask *cpumask; ++ struct cpumask *mask; ++ unsigned int dest_cpu; ++ struct rq_flags rf; ++ struct rq *rq; ++ ++ /* ++ * We can not migrate tasks bounded to a CPU or tasks not ++ * running. The movement of the task will wake it up. ++ */ ++ if (p->flags & PF_NO_SETAFFINITY || p->state) ++ return 0; ++ ++ mutex_lock(&sched_down_mutex); ++ rq = task_rq_lock(p, &rf); ++ ++ cpumask = this_cpu_ptr(&sched_cpumasks); ++ mask = &p->cpus_allowed; ++ ++ cpumask_andnot(cpumask, mask, &sched_down_cpumask); ++ ++ if (!cpumask_weight(cpumask)) { ++ /* It's only on this CPU? */ ++ task_rq_unlock(rq, p, &rf); ++ mutex_unlock(&sched_down_mutex); ++ return 0; ++ } ++ ++ dest_cpu = cpumask_any_and(cpu_active_mask, cpumask); ++ ++ arg.task = p; ++ arg.dest_cpu = dest_cpu; ++ ++ task_rq_unlock(rq, p, &rf); ++ ++ stop_one_cpu(cpu_of(rq), migration_cpu_stop, &arg); ++ tlb_migrate_finish(p->mm); ++ mutex_unlock(&sched_down_mutex); ++ ++ return 1; ++} ++ + /* + * Change a given task's CPU affinity. Migrate the thread to a + * proper CPU and schedule it away if the CPU it's executing on +@@ -1168,7 +1296,7 @@ static int __set_cpus_allowed_ptr(struct task_struct *p, + } + + /* Can the task run on the task's current CPU? If so, we're done */ +- if (cpumask_test_cpu(task_cpu(p), new_mask)) ++ if (cpumask_test_cpu(task_cpu(p), new_mask) || __migrate_disabled(p)) + goto out; + + dest_cpu = cpumask_any_and(cpu_valid_mask, new_mask); +@@ -1355,6 +1483,18 @@ int migrate_swap(struct task_struct *cur, struct task_struct *p) + return ret; + } + ++static bool check_task_state(struct task_struct *p, long match_state) ++{ ++ bool match = false; ++ ++ raw_spin_lock_irq(&p->pi_lock); ++ if (p->state == match_state || p->saved_state == match_state) ++ match = true; ++ raw_spin_unlock_irq(&p->pi_lock); ++ ++ return match; ++} ++ + /* + * wait_task_inactive - wait for a thread to unschedule. + * +@@ -1399,7 +1539,7 @@ unsigned long wait_task_inactive(struct task_struct *p, long match_state) + * is actually now running somewhere else! + */ + while (task_running(rq, p)) { +- if (match_state && unlikely(p->state != match_state)) ++ if (match_state && !check_task_state(p, match_state)) + return 0; + cpu_relax(); + } +@@ -1414,7 +1554,8 @@ unsigned long wait_task_inactive(struct task_struct *p, long match_state) + running = task_running(rq, p); + queued = task_on_rq_queued(p); + ncsw = 0; +- if (!match_state || p->state == match_state) ++ if (!match_state || p->state == match_state || ++ p->saved_state == match_state) + ncsw = p->nvcsw | LONG_MIN; /* sets MSB */ + task_rq_unlock(rq, p, &rf); + +@@ -1670,10 +1811,6 @@ static inline void ttwu_activate(struct rq *rq, struct task_struct *p, int en_fl + { + activate_task(rq, p, en_flags); + p->on_rq = TASK_ON_RQ_QUEUED; +- +- /* if a worker is waking up, notify workqueue */ +- if (p->flags & PF_WQ_WORKER) +- wq_worker_waking_up(p, cpu_of(rq)); + } + + /* +@@ -2008,8 +2145,27 @@ try_to_wake_up(struct task_struct *p, unsigned int state, int wake_flags) + */ + smp_mb__before_spinlock(); + raw_spin_lock_irqsave(&p->pi_lock, flags); +- if (!(p->state & state)) ++ if (!(p->state & state)) { ++ /* ++ * The task might be running due to a spinlock sleeper ++ * wakeup. Check the saved state and set it to running ++ * if the wakeup condition is true. ++ */ ++ if (!(wake_flags & WF_LOCK_SLEEPER)) { ++ if (p->saved_state & state) { ++ p->saved_state = TASK_RUNNING; ++ success = 1; ++ } ++ } + goto out; ++ } ++ ++ /* ++ * If this is a regular wakeup, then we can unconditionally ++ * clear the saved state of a "lock sleeper". ++ */ ++ if (!(wake_flags & WF_LOCK_SLEEPER)) ++ p->saved_state = TASK_RUNNING; + + trace_sched_waking(p); + +@@ -2093,53 +2249,6 @@ try_to_wake_up(struct task_struct *p, unsigned int state, int wake_flags) + } + + /** +- * try_to_wake_up_local - try to wake up a local task with rq lock held +- * @p: the thread to be awakened +- * +- * Put @p on the run-queue if it's not already there. The caller must +- * ensure that this_rq() is locked, @p is bound to this_rq() and not +- * the current task. +- */ +-static void try_to_wake_up_local(struct task_struct *p, struct pin_cookie cookie) +-{ +- struct rq *rq = task_rq(p); +- +- if (WARN_ON_ONCE(rq != this_rq()) || +- WARN_ON_ONCE(p == current)) +- return; +- +- lockdep_assert_held(&rq->lock); +- +- if (!raw_spin_trylock(&p->pi_lock)) { +- /* +- * This is OK, because current is on_cpu, which avoids it being +- * picked for load-balance and preemption/IRQs are still +- * disabled avoiding further scheduler activity on it and we've +- * not yet picked a replacement task. +- */ +- lockdep_unpin_lock(&rq->lock, cookie); +- raw_spin_unlock(&rq->lock); +- raw_spin_lock(&p->pi_lock); +- raw_spin_lock(&rq->lock); +- lockdep_repin_lock(&rq->lock, cookie); +- } +- +- if (!(p->state & TASK_NORMAL)) +- goto out; +- +- trace_sched_waking(p); +- +- if (!task_on_rq_queued(p)) +- ttwu_activate(rq, p, ENQUEUE_WAKEUP); +- +- ttwu_do_wakeup(rq, p, 0, cookie); +- if (schedstat_enabled()) +- ttwu_stat(p, smp_processor_id(), 0); +-out: +- raw_spin_unlock(&p->pi_lock); +-} +- +-/** + * wake_up_process - Wake up a specific process + * @p: The process to be woken up. + * +@@ -2157,6 +2266,18 @@ int wake_up_process(struct task_struct *p) + } + EXPORT_SYMBOL(wake_up_process); + ++/** ++ * wake_up_lock_sleeper - Wake up a specific process blocked on a "sleeping lock" ++ * @p: The process to be woken up. ++ * ++ * Same as wake_up_process() above, but wake_flags=WF_LOCK_SLEEPER to indicate ++ * the nature of the wakeup. ++ */ ++int wake_up_lock_sleeper(struct task_struct *p) ++{ ++ return try_to_wake_up(p, TASK_ALL, WF_LOCK_SLEEPER); ++} ++ + int wake_up_state(struct task_struct *p, unsigned int state) + { + return try_to_wake_up(p, state, 0); +@@ -2433,6 +2554,9 @@ int sched_fork(unsigned long clone_flags, struct task_struct *p) + p->on_cpu = 0; + #endif + init_task_preempt_count(p); ++#ifdef CONFIG_HAVE_PREEMPT_LAZY ++ task_thread_info(p)->preempt_lazy_count = 0; ++#endif + #ifdef CONFIG_SMP + plist_node_init(&p->pushable_tasks, MAX_PRIO); + RB_CLEAR_NODE(&p->pushable_dl_tasks); +@@ -2761,8 +2885,12 @@ static struct rq *finish_task_switch(struct task_struct *prev) + finish_arch_post_lock_switch(); + + fire_sched_in_preempt_notifiers(current); ++ /* ++ * We use mmdrop_delayed() here so we don't have to do the ++ * full __mmdrop() when we are the last user. ++ */ + if (mm) +- mmdrop(mm); ++ mmdrop_delayed(mm); + if (unlikely(prev_state == TASK_DEAD)) { + if (prev->sched_class->task_dead) + prev->sched_class->task_dead(prev); +@@ -3237,6 +3365,77 @@ static inline void schedule_debug(struct task_struct *prev) + schedstat_inc(this_rq(), sched_count); + } + ++#if defined(CONFIG_PREEMPT_RT_FULL) && defined(CONFIG_SMP) ++ ++void migrate_disable(void) ++{ ++ struct task_struct *p = current; ++ ++ if (in_atomic() || irqs_disabled()) { ++#ifdef CONFIG_SCHED_DEBUG ++ p->migrate_disable_atomic++; ++#endif ++ return; ++ } ++ ++#ifdef CONFIG_SCHED_DEBUG ++ if (unlikely(p->migrate_disable_atomic)) { ++ tracing_off(); ++ WARN_ON_ONCE(1); ++ } ++#endif ++ ++ if (p->migrate_disable) { ++ p->migrate_disable++; ++ return; ++ } ++ ++ preempt_disable(); ++ preempt_lazy_disable(); ++ pin_current_cpu(); ++ p->migrate_disable = 1; ++ preempt_enable(); ++} ++EXPORT_SYMBOL(migrate_disable); ++ ++void migrate_enable(void) ++{ ++ struct task_struct *p = current; ++ ++ if (in_atomic() || irqs_disabled()) { ++#ifdef CONFIG_SCHED_DEBUG ++ p->migrate_disable_atomic--; ++#endif ++ return; ++ } ++ ++#ifdef CONFIG_SCHED_DEBUG ++ if (unlikely(p->migrate_disable_atomic)) { ++ tracing_off(); ++ WARN_ON_ONCE(1); ++ } ++#endif ++ WARN_ON_ONCE(p->migrate_disable <= 0); ++ ++ if (p->migrate_disable > 1) { ++ p->migrate_disable--; ++ return; ++ } ++ ++ preempt_disable(); ++ /* ++ * Clearing migrate_disable causes tsk_cpus_allowed to ++ * show the tasks original cpu affinity. ++ */ ++ p->migrate_disable = 0; ++ ++ unpin_current_cpu(); ++ preempt_enable(); ++ preempt_lazy_enable(); ++} ++EXPORT_SYMBOL(migrate_enable); ++#endif ++ + /* + * Pick up the highest-prio task: + */ +@@ -3364,19 +3563,6 @@ static void __sched notrace __schedule(bool preempt) + } else { + deactivate_task(rq, prev, DEQUEUE_SLEEP); + prev->on_rq = 0; +- +- /* +- * If a worker went to sleep, notify and ask workqueue +- * whether it wants to wake up a task to maintain +- * concurrency. +- */ +- if (prev->flags & PF_WQ_WORKER) { +- struct task_struct *to_wakeup; +- +- to_wakeup = wq_worker_sleeping(prev); +- if (to_wakeup) +- try_to_wake_up_local(to_wakeup, cookie); +- } + } + switch_count = &prev->nvcsw; + } +@@ -3386,6 +3572,7 @@ static void __sched notrace __schedule(bool preempt) + + next = pick_next_task(rq, prev, cookie); + clear_tsk_need_resched(prev); ++ clear_tsk_need_resched_lazy(prev); + clear_preempt_need_resched(); + rq->clock_skip_update = 0; + +@@ -3407,9 +3594,20 @@ STACK_FRAME_NON_STANDARD(__schedule); /* switch_to() */ + + static inline void sched_submit_work(struct task_struct *tsk) + { +- if (!tsk->state || tsk_is_pi_blocked(tsk)) ++ if (!tsk->state) + return; + /* ++ * If a worker went to sleep, notify and ask workqueue whether ++ * it wants to wake up a task to maintain concurrency. ++ */ ++ if (tsk->flags & PF_WQ_WORKER) ++ wq_worker_sleeping(tsk); ++ ++ ++ if (tsk_is_pi_blocked(tsk)) ++ return; ++ ++ /* + * If we are going to sleep and we have plugged IO queued, + * make sure to submit it to avoid deadlocks. + */ +@@ -3417,6 +3615,12 @@ static inline void sched_submit_work(struct task_struct *tsk) + blk_schedule_flush_plug(tsk); + } + ++static void sched_update_worker(struct task_struct *tsk) ++{ ++ if (tsk->flags & PF_WQ_WORKER) ++ wq_worker_running(tsk); ++} ++ + asmlinkage __visible void __sched schedule(void) + { + struct task_struct *tsk = current; +@@ -3427,6 +3631,7 @@ asmlinkage __visible void __sched schedule(void) + __schedule(false); + sched_preempt_enable_no_resched(); + } while (need_resched()); ++ sched_update_worker(tsk); + } + EXPORT_SYMBOL(schedule); + +@@ -3490,6 +3695,30 @@ static void __sched notrace preempt_schedule_common(void) + } while (need_resched()); + } + ++#ifdef CONFIG_PREEMPT_LAZY ++/* ++ * If TIF_NEED_RESCHED is then we allow to be scheduled away since this is ++ * set by a RT task. Oterwise we try to avoid beeing scheduled out as long as ++ * preempt_lazy_count counter >0. ++ */ ++static __always_inline int preemptible_lazy(void) ++{ ++ if (test_thread_flag(TIF_NEED_RESCHED)) ++ return 1; ++ if (current_thread_info()->preempt_lazy_count) ++ return 0; ++ return 1; ++} ++ ++#else ++ ++static inline int preemptible_lazy(void) ++{ ++ return 1; ++} ++ ++#endif ++ + #ifdef CONFIG_PREEMPT + /* + * this is the entry point to schedule() from in-kernel preemption +@@ -3504,7 +3733,8 @@ asmlinkage __visible void __sched notrace preempt_schedule(void) + */ + if (likely(!preemptible())) + return; +- ++ if (!preemptible_lazy()) ++ return; + preempt_schedule_common(); + } + NOKPROBE_SYMBOL(preempt_schedule); +@@ -3531,6 +3761,9 @@ asmlinkage __visible void __sched notrace preempt_schedule_notrace(void) + if (likely(!preemptible())) + return; + ++ if (!preemptible_lazy()) ++ return; ++ + do { + /* + * Because the function tracer can trace preempt_count_sub() +@@ -3553,7 +3786,16 @@ asmlinkage __visible void __sched notrace preempt_schedule_notrace(void) + * an infinite recursion. + */ + prev_ctx = exception_enter(); ++ /* ++ * The add/subtract must not be traced by the function ++ * tracer. But we still want to account for the ++ * preempt off latency tracer. Since the _notrace versions ++ * of add/subtract skip the accounting for latency tracer ++ * we must force it manually. ++ */ ++ start_critical_timings(); + __schedule(true); ++ stop_critical_timings(); + exception_exit(prev_ctx); + + preempt_latency_stop(1); +@@ -4901,6 +5143,7 @@ int __cond_resched_lock(spinlock_t *lock) + } + EXPORT_SYMBOL(__cond_resched_lock); + ++#ifndef CONFIG_PREEMPT_RT_FULL + int __sched __cond_resched_softirq(void) + { + BUG_ON(!in_softirq()); +@@ -4914,6 +5157,7 @@ int __sched __cond_resched_softirq(void) + return 0; + } + EXPORT_SYMBOL(__cond_resched_softirq); ++#endif + + /** + * yield - yield the current processor to other threads. +@@ -5283,7 +5527,9 @@ void init_idle(struct task_struct *idle, int cpu) + + /* Set the preempt count _outside_ the spinlocks! */ + init_idle_preempt_count(idle, cpu); +- ++#ifdef CONFIG_HAVE_PREEMPT_LAZY ++ task_thread_info(idle)->preempt_lazy_count = 0; ++#endif + /* + * The idle tasks have their own, simple scheduling class: + */ +@@ -5426,6 +5672,8 @@ void sched_setnuma(struct task_struct *p, int nid) + #endif /* CONFIG_NUMA_BALANCING */ + + #ifdef CONFIG_HOTPLUG_CPU ++static DEFINE_PER_CPU(struct mm_struct *, idle_last_mm); ++ + /* + * Ensures that the idle task is using init_mm right before its cpu goes + * offline. +@@ -5440,7 +5688,12 @@ void idle_task_exit(void) + switch_mm_irqs_off(mm, &init_mm, current); + finish_arch_post_lock_switch(); + } +- mmdrop(mm); ++ /* ++ * Defer the cleanup to an alive cpu. On RT we can neither ++ * call mmdrop() nor mmdrop_delayed() from here. ++ */ ++ per_cpu(idle_last_mm, smp_processor_id()) = mm; ++ + } + + /* +@@ -7315,6 +7568,10 @@ int sched_cpu_dying(unsigned int cpu) + update_max_interval(); + nohz_balance_exit_idle(cpu); + hrtick_clear(rq); ++ if (per_cpu(idle_last_mm, cpu)) { ++ mmdrop_delayed(per_cpu(idle_last_mm, cpu)); ++ per_cpu(idle_last_mm, cpu) = NULL; ++ } + return 0; + } + #endif +@@ -7566,7 +7823,7 @@ void __init sched_init(void) + #ifdef CONFIG_DEBUG_ATOMIC_SLEEP + static inline int preempt_count_equals(int preempt_offset) + { +- int nested = preempt_count() + rcu_preempt_depth(); ++ int nested = preempt_count() + sched_rcu_preempt_depth(); + + return (nested == preempt_offset); + } +diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c +index 1ce8867283dc..766da04b06a0 100644 +--- a/kernel/sched/deadline.c ++++ b/kernel/sched/deadline.c +@@ -697,6 +697,7 @@ void init_dl_task_timer(struct sched_dl_entity *dl_se) + + hrtimer_init(timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); + timer->function = dl_task_timer; ++ timer->irqsafe = 1; + } + + static +diff --git a/kernel/sched/debug.c b/kernel/sched/debug.c +index 2a0a9995256d..48a9b6f57249 100644 +--- a/kernel/sched/debug.c ++++ b/kernel/sched/debug.c +@@ -552,6 +552,9 @@ void print_rt_rq(struct seq_file *m, int cpu, struct rt_rq *rt_rq) + P(rt_throttled); + PN(rt_time); + PN(rt_runtime); ++#ifdef CONFIG_SMP ++ P(rt_nr_migratory); ++#endif + + #undef PN + #undef P +@@ -947,6 +950,10 @@ void proc_sched_show_task(struct task_struct *p, struct seq_file *m) + #endif + P(policy); + P(prio); ++#ifdef CONFIG_PREEMPT_RT_FULL ++ P(migrate_disable); ++#endif ++ P(nr_cpus_allowed); + #undef PN + #undef __PN + #undef P +diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c +index 8b3610c871f2..1145079af264 100644 +--- a/kernel/sched/fair.c ++++ b/kernel/sched/fair.c +@@ -3508,7 +3508,7 @@ check_preempt_tick(struct cfs_rq *cfs_rq, struct sched_entity *curr) + ideal_runtime = sched_slice(cfs_rq, curr); + delta_exec = curr->sum_exec_runtime - curr->prev_sum_exec_runtime; + if (delta_exec > ideal_runtime) { +- resched_curr(rq_of(cfs_rq)); ++ resched_curr_lazy(rq_of(cfs_rq)); + /* + * The current task ran long enough, ensure it doesn't get + * re-elected due to buddy favours. +@@ -3532,7 +3532,7 @@ check_preempt_tick(struct cfs_rq *cfs_rq, struct sched_entity *curr) + return; + + if (delta > ideal_runtime) +- resched_curr(rq_of(cfs_rq)); ++ resched_curr_lazy(rq_of(cfs_rq)); + } + + static void +@@ -3677,7 +3677,7 @@ entity_tick(struct cfs_rq *cfs_rq, struct sched_entity *curr, int queued) + * validating it and just reschedule. + */ + if (queued) { +- resched_curr(rq_of(cfs_rq)); ++ resched_curr_lazy(rq_of(cfs_rq)); + return; + } + /* +@@ -3859,7 +3859,7 @@ static void __account_cfs_rq_runtime(struct cfs_rq *cfs_rq, u64 delta_exec) + * hierarchy can be throttled + */ + if (!assign_cfs_rq_runtime(cfs_rq) && likely(cfs_rq->curr)) +- resched_curr(rq_of(cfs_rq)); ++ resched_curr_lazy(rq_of(cfs_rq)); + } + + static __always_inline +@@ -4487,7 +4487,7 @@ static void hrtick_start_fair(struct rq *rq, struct task_struct *p) + + if (delta < 0) { + if (rq->curr == p) +- resched_curr(rq); ++ resched_curr_lazy(rq); + return; + } + hrtick_start(rq, delta); +@@ -5676,7 +5676,7 @@ static void check_preempt_wakeup(struct rq *rq, struct task_struct *p, int wake_ + return; + + preempt: +- resched_curr(rq); ++ resched_curr_lazy(rq); + /* + * Only set the backward buddy when the current task is still + * on the rq. This can happen when a wakeup gets interleaved +@@ -8402,7 +8402,7 @@ static void task_fork_fair(struct task_struct *p) + * 'current' within the tree based on its new key value. + */ + swap(curr->vruntime, se->vruntime); +- resched_curr(rq); ++ resched_curr_lazy(rq); + } + + se->vruntime -= cfs_rq->min_vruntime; +@@ -8426,7 +8426,7 @@ prio_changed_fair(struct rq *rq, struct task_struct *p, int oldprio) + */ + if (rq->curr == p) { + if (p->prio > oldprio) +- resched_curr(rq); ++ resched_curr_lazy(rq); + } else + check_preempt_curr(rq, p, 0); + } +diff --git a/kernel/sched/features.h b/kernel/sched/features.h +index 69631fa46c2f..6d28fcd08872 100644 +--- a/kernel/sched/features.h ++++ b/kernel/sched/features.h +@@ -45,11 +45,19 @@ SCHED_FEAT(LB_BIAS, true) + */ + SCHED_FEAT(NONTASK_CAPACITY, true) + ++#ifdef CONFIG_PREEMPT_RT_FULL ++SCHED_FEAT(TTWU_QUEUE, false) ++# ifdef CONFIG_PREEMPT_LAZY ++SCHED_FEAT(PREEMPT_LAZY, true) ++# endif ++#else ++ + /* + * Queue remote wakeups on the target CPU and process them + * using the scheduler IPI. Reduces rq->lock contention/bounces. + */ + SCHED_FEAT(TTWU_QUEUE, true) ++#endif + + #ifdef HAVE_RT_PUSH_IPI + /* +diff --git a/kernel/sched/rt.c b/kernel/sched/rt.c +index d5690b722691..731cd0e98c15 100644 +--- a/kernel/sched/rt.c ++++ b/kernel/sched/rt.c +@@ -47,6 +47,7 @@ void init_rt_bandwidth(struct rt_bandwidth *rt_b, u64 period, u64 runtime) + + hrtimer_init(&rt_b->rt_period_timer, + CLOCK_MONOTONIC, HRTIMER_MODE_REL); ++ rt_b->rt_period_timer.irqsafe = 1; + rt_b->rt_period_timer.function = sched_rt_period_timer; + } + +@@ -101,6 +102,7 @@ void init_rt_rq(struct rt_rq *rt_rq) + rt_rq->push_cpu = nr_cpu_ids; + raw_spin_lock_init(&rt_rq->push_lock); + init_irq_work(&rt_rq->push_work, push_irq_work_func); ++ rt_rq->push_work.flags |= IRQ_WORK_HARD_IRQ; + #endif + #endif /* CONFIG_SMP */ + /* We start is dequeued state, because no RT tasks are queued */ +diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h +index c64fc5114004..af58f9b3ece4 100644 +--- a/kernel/sched/sched.h ++++ b/kernel/sched/sched.h +@@ -1138,6 +1138,7 @@ static inline void finish_lock_switch(struct rq *rq, struct task_struct *prev) + #define WF_SYNC 0x01 /* waker goes to sleep after wakeup */ + #define WF_FORK 0x02 /* child wakeup after fork */ + #define WF_MIGRATED 0x4 /* internal use, task got migrated */ ++#define WF_LOCK_SLEEPER 0x08 /* wakeup spinlock "sleeper" */ + + /* + * To aid in avoiding the subversion of "niceness" due to uneven distribution +@@ -1316,6 +1317,15 @@ extern void init_sched_fair_class(void); + extern void resched_curr(struct rq *rq); + extern void resched_cpu(int cpu); + ++#ifdef CONFIG_PREEMPT_LAZY ++extern void resched_curr_lazy(struct rq *rq); ++#else ++static inline void resched_curr_lazy(struct rq *rq) ++{ ++ resched_curr(rq); ++} ++#endif ++ + extern struct rt_bandwidth def_rt_bandwidth; + extern void init_rt_bandwidth(struct rt_bandwidth *rt_b, u64 period, u64 runtime); + +diff --git a/kernel/sched/swait.c b/kernel/sched/swait.c +index 82f0dff90030..ef027ff3250a 100644 +--- a/kernel/sched/swait.c ++++ b/kernel/sched/swait.c +@@ -1,5 +1,6 @@ + #include <linux/sched.h> + #include <linux/swait.h> ++#include <linux/suspend.h> + + void __init_swait_queue_head(struct swait_queue_head *q, const char *name, + struct lock_class_key *key) +@@ -29,6 +30,25 @@ void swake_up_locked(struct swait_queue_head *q) + } + EXPORT_SYMBOL(swake_up_locked); + ++void swake_up_all_locked(struct swait_queue_head *q) ++{ ++ struct swait_queue *curr; ++ int wakes = 0; ++ ++ while (!list_empty(&q->task_list)) { ++ ++ curr = list_first_entry(&q->task_list, typeof(*curr), ++ task_list); ++ wake_up_process(curr->task); ++ list_del_init(&curr->task_list); ++ wakes++; ++ } ++ if (pm_in_action) ++ return; ++ WARN(wakes > 2, "complete_all() with %d waiters\n", wakes); ++} ++EXPORT_SYMBOL(swake_up_all_locked); ++ + void swake_up(struct swait_queue_head *q) + { + unsigned long flags; +@@ -54,6 +74,7 @@ void swake_up_all(struct swait_queue_head *q) + if (!swait_active(q)) + return; + ++ WARN_ON(irqs_disabled()); + raw_spin_lock_irq(&q->lock); + list_splice_init(&q->task_list, &tmp); + while (!list_empty(&tmp)) { +diff --git a/kernel/sched/swork.c b/kernel/sched/swork.c +new file mode 100644 +index 000000000000..1950f40ca725 +--- /dev/null ++++ b/kernel/sched/swork.c +@@ -0,0 +1,173 @@ ++/* ++ * Copyright (C) 2014 BMW Car IT GmbH, Daniel Wagner daniel.wagner@bmw-carit.de ++ * ++ * Provides a framework for enqueuing callbacks from irq context ++ * PREEMPT_RT_FULL safe. The callbacks are executed in kthread context. ++ */ ++ ++#include <linux/swait.h> ++#include <linux/swork.h> ++#include <linux/kthread.h> ++#include <linux/slab.h> ++#include <linux/spinlock.h> ++#include <linux/export.h> ++ ++#define SWORK_EVENT_PENDING (1 << 0) ++ ++static DEFINE_MUTEX(worker_mutex); ++static struct sworker *glob_worker; ++ ++struct sworker { ++ struct list_head events; ++ struct swait_queue_head wq; ++ ++ raw_spinlock_t lock; ++ ++ struct task_struct *task; ++ int refs; ++}; ++ ++static bool swork_readable(struct sworker *worker) ++{ ++ bool r; ++ ++ if (kthread_should_stop()) ++ return true; ++ ++ raw_spin_lock_irq(&worker->lock); ++ r = !list_empty(&worker->events); ++ raw_spin_unlock_irq(&worker->lock); ++ ++ return r; ++} ++ ++static int swork_kthread(void *arg) ++{ ++ struct sworker *worker = arg; ++ ++ for (;;) { ++ swait_event_interruptible(worker->wq, ++ swork_readable(worker)); ++ if (kthread_should_stop()) ++ break; ++ ++ raw_spin_lock_irq(&worker->lock); ++ while (!list_empty(&worker->events)) { ++ struct swork_event *sev; ++ ++ sev = list_first_entry(&worker->events, ++ struct swork_event, item); ++ list_del(&sev->item); ++ raw_spin_unlock_irq(&worker->lock); ++ ++ WARN_ON_ONCE(!test_and_clear_bit(SWORK_EVENT_PENDING, ++ &sev->flags)); ++ sev->func(sev); ++ raw_spin_lock_irq(&worker->lock); ++ } ++ raw_spin_unlock_irq(&worker->lock); ++ } ++ return 0; ++} ++ ++static struct sworker *swork_create(void) ++{ ++ struct sworker *worker; ++ ++ worker = kzalloc(sizeof(*worker), GFP_KERNEL); ++ if (!worker) ++ return ERR_PTR(-ENOMEM); ++ ++ INIT_LIST_HEAD(&worker->events); ++ raw_spin_lock_init(&worker->lock); ++ init_swait_queue_head(&worker->wq); ++ ++ worker->task = kthread_run(swork_kthread, worker, "kswork"); ++ if (IS_ERR(worker->task)) { ++ kfree(worker); ++ return ERR_PTR(-ENOMEM); ++ } ++ ++ return worker; ++} ++ ++static void swork_destroy(struct sworker *worker) ++{ ++ kthread_stop(worker->task); ++ ++ WARN_ON(!list_empty(&worker->events)); ++ kfree(worker); ++} ++ ++/** ++ * swork_queue - queue swork ++ * ++ * Returns %false if @work was already on a queue, %true otherwise. ++ * ++ * The work is queued and processed on a random CPU ++ */ ++bool swork_queue(struct swork_event *sev) ++{ ++ unsigned long flags; ++ ++ if (test_and_set_bit(SWORK_EVENT_PENDING, &sev->flags)) ++ return false; ++ ++ raw_spin_lock_irqsave(&glob_worker->lock, flags); ++ list_add_tail(&sev->item, &glob_worker->events); ++ raw_spin_unlock_irqrestore(&glob_worker->lock, flags); ++ ++ swake_up(&glob_worker->wq); ++ return true; ++} ++EXPORT_SYMBOL_GPL(swork_queue); ++ ++/** ++ * swork_get - get an instance of the sworker ++ * ++ * Returns an negative error code if the initialization if the worker did not ++ * work, %0 otherwise. ++ * ++ */ ++int swork_get(void) ++{ ++ struct sworker *worker; ++ ++ mutex_lock(&worker_mutex); ++ if (!glob_worker) { ++ worker = swork_create(); ++ if (IS_ERR(worker)) { ++ mutex_unlock(&worker_mutex); ++ return -ENOMEM; ++ } ++ ++ glob_worker = worker; ++ } ++ ++ glob_worker->refs++; ++ mutex_unlock(&worker_mutex); ++ ++ return 0; ++} ++EXPORT_SYMBOL_GPL(swork_get); ++ ++/** ++ * swork_put - puts an instance of the sworker ++ * ++ * Will destroy the sworker thread. This function must not be called until all ++ * queued events have been completed. ++ */ ++void swork_put(void) ++{ ++ mutex_lock(&worker_mutex); ++ ++ glob_worker->refs--; ++ if (glob_worker->refs > 0) ++ goto out; ++ ++ swork_destroy(glob_worker); ++ glob_worker = NULL; ++out: ++ mutex_unlock(&worker_mutex); ++} ++EXPORT_SYMBOL_GPL(swork_put); +diff --git a/kernel/signal.c b/kernel/signal.c +index af21afc00d08..7ead97a43298 100644 +--- a/kernel/signal.c ++++ b/kernel/signal.c +@@ -14,6 +14,7 @@ + #include <linux/export.h> + #include <linux/init.h> + #include <linux/sched.h> ++#include <linux/sched/rt.h> + #include <linux/fs.h> + #include <linux/tty.h> + #include <linux/binfmts.h> +@@ -352,13 +353,30 @@ static bool task_participate_group_stop(struct task_struct *task) + return false; + } + ++static inline struct sigqueue *get_task_cache(struct task_struct *t) ++{ ++ struct sigqueue *q = t->sigqueue_cache; ++ ++ if (cmpxchg(&t->sigqueue_cache, q, NULL) != q) ++ return NULL; ++ return q; ++} ++ ++static inline int put_task_cache(struct task_struct *t, struct sigqueue *q) ++{ ++ if (cmpxchg(&t->sigqueue_cache, NULL, q) == NULL) ++ return 0; ++ return 1; ++} ++ + /* + * allocate a new signal queue record + * - this may be called without locks if and only if t == current, otherwise an + * appropriate lock must be held to stop the target task from exiting + */ + static struct sigqueue * +-__sigqueue_alloc(int sig, struct task_struct *t, gfp_t flags, int override_rlimit) ++__sigqueue_do_alloc(int sig, struct task_struct *t, gfp_t flags, ++ int override_rlimit, int fromslab) + { + struct sigqueue *q = NULL; + struct user_struct *user; +@@ -375,7 +393,10 @@ __sigqueue_alloc(int sig, struct task_struct *t, gfp_t flags, int override_rlimi + if (override_rlimit || + atomic_read(&user->sigpending) <= + task_rlimit(t, RLIMIT_SIGPENDING)) { +- q = kmem_cache_alloc(sigqueue_cachep, flags); ++ if (!fromslab) ++ q = get_task_cache(t); ++ if (!q) ++ q = kmem_cache_alloc(sigqueue_cachep, flags); + } else { + print_dropped_signal(sig); + } +@@ -392,6 +413,13 @@ __sigqueue_alloc(int sig, struct task_struct *t, gfp_t flags, int override_rlimi + return q; + } + ++static struct sigqueue * ++__sigqueue_alloc(int sig, struct task_struct *t, gfp_t flags, ++ int override_rlimit) ++{ ++ return __sigqueue_do_alloc(sig, t, flags, override_rlimit, 0); ++} ++ + static void __sigqueue_free(struct sigqueue *q) + { + if (q->flags & SIGQUEUE_PREALLOC) +@@ -401,6 +429,21 @@ static void __sigqueue_free(struct sigqueue *q) + kmem_cache_free(sigqueue_cachep, q); + } + ++static void sigqueue_free_current(struct sigqueue *q) ++{ ++ struct user_struct *up; ++ ++ if (q->flags & SIGQUEUE_PREALLOC) ++ return; ++ ++ up = q->user; ++ if (rt_prio(current->normal_prio) && !put_task_cache(current, q)) { ++ atomic_dec(&up->sigpending); ++ free_uid(up); ++ } else ++ __sigqueue_free(q); ++} ++ + void flush_sigqueue(struct sigpending *queue) + { + struct sigqueue *q; +@@ -414,6 +457,21 @@ void flush_sigqueue(struct sigpending *queue) + } + + /* ++ * Called from __exit_signal. Flush tsk->pending and ++ * tsk->sigqueue_cache ++ */ ++void flush_task_sigqueue(struct task_struct *tsk) ++{ ++ struct sigqueue *q; ++ ++ flush_sigqueue(&tsk->pending); ++ ++ q = get_task_cache(tsk); ++ if (q) ++ kmem_cache_free(sigqueue_cachep, q); ++} ++ ++/* + * Flush all pending signals for this kthread. + */ + void flush_signals(struct task_struct *t) +@@ -525,7 +583,7 @@ static void collect_signal(int sig, struct sigpending *list, siginfo_t *info) + still_pending: + list_del_init(&first->list); + copy_siginfo(info, &first->info); +- __sigqueue_free(first); ++ sigqueue_free_current(first); + } else { + /* + * Ok, it wasn't in the queue. This must be +@@ -560,6 +618,8 @@ int dequeue_signal(struct task_struct *tsk, sigset_t *mask, siginfo_t *info) + { + int signr; + ++ WARN_ON_ONCE(tsk != current); ++ + /* We only dequeue private signals from ourselves, we don't let + * signalfd steal them + */ +@@ -1156,8 +1216,8 @@ int do_send_sig_info(int sig, struct siginfo *info, struct task_struct *p, + * We don't want to have recursive SIGSEGV's etc, for example, + * that is why we also clear SIGNAL_UNKILLABLE. + */ +-int +-force_sig_info(int sig, struct siginfo *info, struct task_struct *t) ++static int ++do_force_sig_info(int sig, struct siginfo *info, struct task_struct *t) + { + unsigned long int flags; + int ret, blocked, ignored; +@@ -1182,6 +1242,39 @@ force_sig_info(int sig, struct siginfo *info, struct task_struct *t) + return ret; + } + ++int force_sig_info(int sig, struct siginfo *info, struct task_struct *t) ++{ ++/* ++ * On some archs, PREEMPT_RT has to delay sending a signal from a trap ++ * since it can not enable preemption, and the signal code's spin_locks ++ * turn into mutexes. Instead, it must set TIF_NOTIFY_RESUME which will ++ * send the signal on exit of the trap. ++ */ ++#ifdef ARCH_RT_DELAYS_SIGNAL_SEND ++ if (in_atomic()) { ++ if (WARN_ON_ONCE(t != current)) ++ return 0; ++ if (WARN_ON_ONCE(t->forced_info.si_signo)) ++ return 0; ++ ++ if (is_si_special(info)) { ++ WARN_ON_ONCE(info != SEND_SIG_PRIV); ++ t->forced_info.si_signo = sig; ++ t->forced_info.si_errno = 0; ++ t->forced_info.si_code = SI_KERNEL; ++ t->forced_info.si_pid = 0; ++ t->forced_info.si_uid = 0; ++ } else { ++ t->forced_info = *info; ++ } ++ ++ set_tsk_thread_flag(t, TIF_NOTIFY_RESUME); ++ return 0; ++ } ++#endif ++ return do_force_sig_info(sig, info, t); ++} ++ + /* + * Nuke all other threads in the group. + */ +@@ -1216,12 +1309,12 @@ struct sighand_struct *__lock_task_sighand(struct task_struct *tsk, + * Disable interrupts early to avoid deadlocks. + * See rcu_read_unlock() comment header for details. + */ +- local_irq_save(*flags); ++ local_irq_save_nort(*flags); + rcu_read_lock(); + sighand = rcu_dereference(tsk->sighand); + if (unlikely(sighand == NULL)) { + rcu_read_unlock(); +- local_irq_restore(*flags); ++ local_irq_restore_nort(*flags); + break; + } + /* +@@ -1242,7 +1335,7 @@ struct sighand_struct *__lock_task_sighand(struct task_struct *tsk, + } + spin_unlock(&sighand->siglock); + rcu_read_unlock(); +- local_irq_restore(*flags); ++ local_irq_restore_nort(*flags); + } + + return sighand; +@@ -1485,7 +1578,8 @@ EXPORT_SYMBOL(kill_pid); + */ + struct sigqueue *sigqueue_alloc(void) + { +- struct sigqueue *q = __sigqueue_alloc(-1, current, GFP_KERNEL, 0); ++ /* Preallocated sigqueue objects always from the slabcache ! */ ++ struct sigqueue *q = __sigqueue_do_alloc(-1, current, GFP_KERNEL, 0, 1); + + if (q) + q->flags |= SIGQUEUE_PREALLOC; +@@ -1846,15 +1940,7 @@ static void ptrace_stop(int exit_code, int why, int clear_code, siginfo_t *info) + if (gstop_done && ptrace_reparented(current)) + do_notify_parent_cldstop(current, false, why); + +- /* +- * Don't want to allow preemption here, because +- * sys_ptrace() needs this task to be inactive. +- * +- * XXX: implement read_unlock_no_resched(). +- */ +- preempt_disable(); + read_unlock(&tasklist_lock); +- preempt_enable_no_resched(); + freezable_schedule(); + } else { + /* +diff --git a/kernel/softirq.c b/kernel/softirq.c +index 17caf4b63342..a602b7152de7 100644 +--- a/kernel/softirq.c ++++ b/kernel/softirq.c +@@ -21,10 +21,12 @@ + #include <linux/freezer.h> + #include <linux/kthread.h> + #include <linux/rcupdate.h> ++#include <linux/delay.h> + #include <linux/ftrace.h> + #include <linux/smp.h> + #include <linux/smpboot.h> + #include <linux/tick.h> ++#include <linux/locallock.h> + #include <linux/irq.h> + + #define CREATE_TRACE_POINTS +@@ -56,12 +58,108 @@ EXPORT_SYMBOL(irq_stat); + static struct softirq_action softirq_vec[NR_SOFTIRQS] __cacheline_aligned_in_smp; + + DEFINE_PER_CPU(struct task_struct *, ksoftirqd); ++#ifdef CONFIG_PREEMPT_RT_FULL ++#define TIMER_SOFTIRQS ((1 << TIMER_SOFTIRQ) | (1 << HRTIMER_SOFTIRQ)) ++DEFINE_PER_CPU(struct task_struct *, ktimer_softirqd); ++#endif + + const char * const softirq_to_name[NR_SOFTIRQS] = { + "HI", "TIMER", "NET_TX", "NET_RX", "BLOCK", "BLOCK_IOPOLL", + "TASKLET", "SCHED", "HRTIMER", "RCU" + }; + ++#ifdef CONFIG_NO_HZ_COMMON ++# ifdef CONFIG_PREEMPT_RT_FULL ++ ++struct softirq_runner { ++ struct task_struct *runner[NR_SOFTIRQS]; ++}; ++ ++static DEFINE_PER_CPU(struct softirq_runner, softirq_runners); ++ ++static inline void softirq_set_runner(unsigned int sirq) ++{ ++ struct softirq_runner *sr = this_cpu_ptr(&softirq_runners); ++ ++ sr->runner[sirq] = current; ++} ++ ++static inline void softirq_clr_runner(unsigned int sirq) ++{ ++ struct softirq_runner *sr = this_cpu_ptr(&softirq_runners); ++ ++ sr->runner[sirq] = NULL; ++} ++ ++/* ++ * On preempt-rt a softirq running context might be blocked on a ++ * lock. There might be no other runnable task on this CPU because the ++ * lock owner runs on some other CPU. So we have to go into idle with ++ * the pending bit set. Therefor we need to check this otherwise we ++ * warn about false positives which confuses users and defeats the ++ * whole purpose of this test. ++ * ++ * This code is called with interrupts disabled. ++ */ ++void softirq_check_pending_idle(void) ++{ ++ static int rate_limit; ++ struct softirq_runner *sr = this_cpu_ptr(&softirq_runners); ++ u32 warnpending; ++ int i; ++ ++ if (rate_limit >= 10) ++ return; ++ ++ warnpending = local_softirq_pending() & SOFTIRQ_STOP_IDLE_MASK; ++ for (i = 0; i < NR_SOFTIRQS; i++) { ++ struct task_struct *tsk = sr->runner[i]; ++ ++ /* ++ * The wakeup code in rtmutex.c wakes up the task ++ * _before_ it sets pi_blocked_on to NULL under ++ * tsk->pi_lock. So we need to check for both: state ++ * and pi_blocked_on. ++ */ ++ if (tsk) { ++ raw_spin_lock(&tsk->pi_lock); ++ if (tsk->pi_blocked_on || tsk->state == TASK_RUNNING) { ++ /* Clear all bits pending in that task */ ++ warnpending &= ~(tsk->softirqs_raised); ++ warnpending &= ~(1 << i); ++ } ++ raw_spin_unlock(&tsk->pi_lock); ++ } ++ } ++ ++ if (warnpending) { ++ printk(KERN_ERR "NOHZ: local_softirq_pending %02x\n", ++ warnpending); ++ rate_limit++; ++ } ++} ++# else ++/* ++ * On !PREEMPT_RT we just printk rate limited: ++ */ ++void softirq_check_pending_idle(void) ++{ ++ static int rate_limit; ++ ++ if (rate_limit < 10 && ++ (local_softirq_pending() & SOFTIRQ_STOP_IDLE_MASK)) { ++ printk(KERN_ERR "NOHZ: local_softirq_pending %02x\n", ++ local_softirq_pending()); ++ rate_limit++; ++ } ++} ++# endif ++ ++#else /* !CONFIG_NO_HZ_COMMON */ ++static inline void softirq_set_runner(unsigned int sirq) { } ++static inline void softirq_clr_runner(unsigned int sirq) { } ++#endif ++ + /* + * we cannot loop indefinitely here to avoid userspace starvation, + * but we also don't want to introduce a worst case 1/HZ latency +@@ -77,6 +175,79 @@ static void wakeup_softirqd(void) + wake_up_process(tsk); + } + ++#ifdef CONFIG_PREEMPT_RT_FULL ++static void wakeup_timer_softirqd(void) ++{ ++ /* Interrupts are disabled: no need to stop preemption */ ++ struct task_struct *tsk = __this_cpu_read(ktimer_softirqd); ++ ++ if (tsk && tsk->state != TASK_RUNNING) ++ wake_up_process(tsk); ++} ++#endif ++ ++static void handle_softirq(unsigned int vec_nr) ++{ ++ struct softirq_action *h = softirq_vec + vec_nr; ++ int prev_count; ++ ++ prev_count = preempt_count(); ++ ++ kstat_incr_softirqs_this_cpu(vec_nr); ++ ++ trace_softirq_entry(vec_nr); ++ h->action(h); ++ trace_softirq_exit(vec_nr); ++ if (unlikely(prev_count != preempt_count())) { ++ pr_err("huh, entered softirq %u %s %p with preempt_count %08x, exited with %08x?\n", ++ vec_nr, softirq_to_name[vec_nr], h->action, ++ prev_count, preempt_count()); ++ preempt_count_set(prev_count); ++ } ++} ++ ++#ifndef CONFIG_PREEMPT_RT_FULL ++static inline int ksoftirqd_softirq_pending(void) ++{ ++ return local_softirq_pending(); ++} ++ ++static void handle_pending_softirqs(u32 pending) ++{ ++ struct softirq_action *h = softirq_vec; ++ int softirq_bit; ++ ++ local_irq_enable(); ++ ++ h = softirq_vec; ++ ++ while ((softirq_bit = ffs(pending))) { ++ unsigned int vec_nr; ++ ++ h += softirq_bit - 1; ++ vec_nr = h - softirq_vec; ++ handle_softirq(vec_nr); ++ ++ h++; ++ pending >>= softirq_bit; ++ } ++ ++ rcu_bh_qs(); ++ local_irq_disable(); ++} ++ ++static void run_ksoftirqd(unsigned int cpu) ++{ ++ local_irq_disable(); ++ if (ksoftirqd_softirq_pending()) { ++ __do_softirq(); ++ local_irq_enable(); ++ cond_resched_rcu_qs(); ++ return; ++ } ++ local_irq_enable(); ++} ++ + /* + * preempt_count and SOFTIRQ_OFFSET usage: + * - preempt_count is changed by SOFTIRQ_OFFSET on entering or leaving +@@ -232,10 +403,8 @@ asmlinkage __visible void __softirq_entry __do_softirq(void) + unsigned long end = jiffies + MAX_SOFTIRQ_TIME; + unsigned long old_flags = current->flags; + int max_restart = MAX_SOFTIRQ_RESTART; +- struct softirq_action *h; + bool in_hardirq; + __u32 pending; +- int softirq_bit; + + /* + * Mask out PF_MEMALLOC s current task context is borrowed for the +@@ -254,36 +423,7 @@ asmlinkage __visible void __softirq_entry __do_softirq(void) + /* Reset the pending bitmask before enabling irqs */ + set_softirq_pending(0); + +- local_irq_enable(); +- +- h = softirq_vec; +- +- while ((softirq_bit = ffs(pending))) { +- unsigned int vec_nr; +- int prev_count; +- +- h += softirq_bit - 1; +- +- vec_nr = h - softirq_vec; +- prev_count = preempt_count(); +- +- kstat_incr_softirqs_this_cpu(vec_nr); +- +- trace_softirq_entry(vec_nr); +- h->action(h); +- trace_softirq_exit(vec_nr); +- if (unlikely(prev_count != preempt_count())) { +- pr_err("huh, entered softirq %u %s %p with preempt_count %08x, exited with %08x?\n", +- vec_nr, softirq_to_name[vec_nr], h->action, +- prev_count, preempt_count()); +- preempt_count_set(prev_count); +- } +- h++; +- pending >>= softirq_bit; +- } +- +- rcu_bh_qs(); +- local_irq_disable(); ++ handle_pending_softirqs(pending); + + pending = local_softirq_pending(); + if (pending) { +@@ -320,6 +460,310 @@ asmlinkage __visible void do_softirq(void) + } + + /* ++ * This function must run with irqs disabled! ++ */ ++void raise_softirq_irqoff(unsigned int nr) ++{ ++ __raise_softirq_irqoff(nr); ++ ++ /* ++ * If we're in an interrupt or softirq, we're done ++ * (this also catches softirq-disabled code). We will ++ * actually run the softirq once we return from ++ * the irq or softirq. ++ * ++ * Otherwise we wake up ksoftirqd to make sure we ++ * schedule the softirq soon. ++ */ ++ if (!in_interrupt()) ++ wakeup_softirqd(); ++} ++ ++void __raise_softirq_irqoff(unsigned int nr) ++{ ++ trace_softirq_raise(nr); ++ or_softirq_pending(1UL << nr); ++} ++ ++static inline void local_bh_disable_nort(void) { local_bh_disable(); } ++static inline void _local_bh_enable_nort(void) { _local_bh_enable(); } ++static void ksoftirqd_set_sched_params(unsigned int cpu) { } ++ ++#else /* !PREEMPT_RT_FULL */ ++ ++/* ++ * On RT we serialize softirq execution with a cpu local lock per softirq ++ */ ++static DEFINE_PER_CPU(struct local_irq_lock [NR_SOFTIRQS], local_softirq_locks); ++ ++void __init softirq_early_init(void) ++{ ++ int i; ++ ++ for (i = 0; i < NR_SOFTIRQS; i++) ++ local_irq_lock_init(local_softirq_locks[i]); ++} ++ ++static void lock_softirq(int which) ++{ ++ local_lock(local_softirq_locks[which]); ++} ++ ++static void unlock_softirq(int which) ++{ ++ local_unlock(local_softirq_locks[which]); ++} ++ ++static void do_single_softirq(int which) ++{ ++ unsigned long old_flags = current->flags; ++ ++ current->flags &= ~PF_MEMALLOC; ++ vtime_account_irq_enter(current); ++ current->flags |= PF_IN_SOFTIRQ; ++ lockdep_softirq_enter(); ++ local_irq_enable(); ++ handle_softirq(which); ++ local_irq_disable(); ++ lockdep_softirq_exit(); ++ current->flags &= ~PF_IN_SOFTIRQ; ++ vtime_account_irq_enter(current); ++ tsk_restore_flags(current, old_flags, PF_MEMALLOC); ++} ++ ++/* ++ * Called with interrupts disabled. Process softirqs which were raised ++ * in current context (or on behalf of ksoftirqd). ++ */ ++static void do_current_softirqs(void) ++{ ++ while (current->softirqs_raised) { ++ int i = __ffs(current->softirqs_raised); ++ unsigned int pending, mask = (1U << i); ++ ++ current->softirqs_raised &= ~mask; ++ local_irq_enable(); ++ ++ /* ++ * If the lock is contended, we boost the owner to ++ * process the softirq or leave the critical section ++ * now. ++ */ ++ lock_softirq(i); ++ local_irq_disable(); ++ softirq_set_runner(i); ++ /* ++ * Check with the local_softirq_pending() bits, ++ * whether we need to process this still or if someone ++ * else took care of it. ++ */ ++ pending = local_softirq_pending(); ++ if (pending & mask) { ++ set_softirq_pending(pending & ~mask); ++ do_single_softirq(i); ++ } ++ softirq_clr_runner(i); ++ WARN_ON(current->softirq_nestcnt != 1); ++ local_irq_enable(); ++ unlock_softirq(i); ++ local_irq_disable(); ++ } ++} ++ ++void __local_bh_disable(void) ++{ ++ if (++current->softirq_nestcnt == 1) ++ migrate_disable(); ++} ++EXPORT_SYMBOL(__local_bh_disable); ++ ++void __local_bh_enable(void) ++{ ++ if (WARN_ON(current->softirq_nestcnt == 0)) ++ return; ++ ++ local_irq_disable(); ++ if (current->softirq_nestcnt == 1 && current->softirqs_raised) ++ do_current_softirqs(); ++ local_irq_enable(); ++ ++ if (--current->softirq_nestcnt == 0) ++ migrate_enable(); ++} ++EXPORT_SYMBOL(__local_bh_enable); ++ ++void _local_bh_enable(void) ++{ ++ if (WARN_ON(current->softirq_nestcnt == 0)) ++ return; ++ if (--current->softirq_nestcnt == 0) ++ migrate_enable(); ++} ++EXPORT_SYMBOL(_local_bh_enable); ++ ++int in_serving_softirq(void) ++{ ++ return current->flags & PF_IN_SOFTIRQ; ++} ++EXPORT_SYMBOL(in_serving_softirq); ++ ++/* Called with preemption disabled */ ++static void run_ksoftirqd(unsigned int cpu) ++{ ++ local_irq_disable(); ++ current->softirq_nestcnt++; ++ ++ do_current_softirqs(); ++ current->softirq_nestcnt--; ++ local_irq_enable(); ++ cond_resched_rcu_qs(); ++} ++ ++/* ++ * Called from netif_rx_ni(). Preemption enabled, but migration ++ * disabled. So the cpu can't go away under us. ++ */ ++void thread_do_softirq(void) ++{ ++ if (!in_serving_softirq() && current->softirqs_raised) { ++ current->softirq_nestcnt++; ++ do_current_softirqs(); ++ current->softirq_nestcnt--; ++ } ++} ++ ++static void do_raise_softirq_irqoff(unsigned int nr) ++{ ++ unsigned int mask; ++ ++ mask = 1UL << nr; ++ ++ trace_softirq_raise(nr); ++ or_softirq_pending(mask); ++ ++ /* ++ * If we are not in a hard interrupt and inside a bh disabled ++ * region, we simply raise the flag on current. local_bh_enable() ++ * will make sure that the softirq is executed. Otherwise we ++ * delegate it to ksoftirqd. ++ */ ++ if (!in_irq() && current->softirq_nestcnt) ++ current->softirqs_raised |= mask; ++ else if (!__this_cpu_read(ksoftirqd) || !__this_cpu_read(ktimer_softirqd)) ++ return; ++ ++ if (mask & TIMER_SOFTIRQS) ++ __this_cpu_read(ktimer_softirqd)->softirqs_raised |= mask; ++ else ++ __this_cpu_read(ksoftirqd)->softirqs_raised |= mask; ++} ++ ++static void wakeup_proper_softirq(unsigned int nr) ++{ ++ if ((1UL << nr) & TIMER_SOFTIRQS) ++ wakeup_timer_softirqd(); ++ else ++ wakeup_softirqd(); ++} ++ ++ ++void __raise_softirq_irqoff(unsigned int nr) ++{ ++ do_raise_softirq_irqoff(nr); ++ if (!in_irq() && !current->softirq_nestcnt) ++ wakeup_proper_softirq(nr); ++} ++ ++/* ++ * Same as __raise_softirq_irqoff() but will process them in ksoftirqd ++ */ ++void __raise_softirq_irqoff_ksoft(unsigned int nr) ++{ ++ unsigned int mask; ++ ++ if (WARN_ON_ONCE(!__this_cpu_read(ksoftirqd) || ++ !__this_cpu_read(ktimer_softirqd))) ++ return; ++ mask = 1UL << nr; ++ ++ trace_softirq_raise(nr); ++ or_softirq_pending(mask); ++ if (mask & TIMER_SOFTIRQS) ++ __this_cpu_read(ktimer_softirqd)->softirqs_raised |= mask; ++ else ++ __this_cpu_read(ksoftirqd)->softirqs_raised |= mask; ++ wakeup_proper_softirq(nr); ++} ++ ++/* ++ * This function must run with irqs disabled! ++ */ ++void raise_softirq_irqoff(unsigned int nr) ++{ ++ do_raise_softirq_irqoff(nr); ++ ++ /* ++ * If we're in an hard interrupt we let irq return code deal ++ * with the wakeup of ksoftirqd. ++ */ ++ if (in_irq()) ++ return; ++ /* ++ * If we are in thread context but outside of a bh disabled ++ * region, we need to wake ksoftirqd as well. ++ * ++ * CHECKME: Some of the places which do that could be wrapped ++ * into local_bh_disable/enable pairs. Though it's unclear ++ * whether this is worth the effort. To find those places just ++ * raise a WARN() if the condition is met. ++ */ ++ if (!current->softirq_nestcnt) ++ wakeup_proper_softirq(nr); ++} ++ ++static inline int ksoftirqd_softirq_pending(void) ++{ ++ return current->softirqs_raised; ++} ++ ++static inline void local_bh_disable_nort(void) { } ++static inline void _local_bh_enable_nort(void) { } ++ ++static inline void ksoftirqd_set_sched_params(unsigned int cpu) ++{ ++ /* Take over all but timer pending softirqs when starting */ ++ local_irq_disable(); ++ current->softirqs_raised = local_softirq_pending() & ~TIMER_SOFTIRQS; ++ local_irq_enable(); ++} ++ ++static inline void ktimer_softirqd_set_sched_params(unsigned int cpu) ++{ ++ struct sched_param param = { .sched_priority = 1 }; ++ ++ sched_setscheduler(current, SCHED_FIFO, ¶m); ++ ++ /* Take over timer pending softirqs when starting */ ++ local_irq_disable(); ++ current->softirqs_raised = local_softirq_pending() & TIMER_SOFTIRQS; ++ local_irq_enable(); ++} ++ ++static inline void ktimer_softirqd_clr_sched_params(unsigned int cpu, ++ bool online) ++{ ++ struct sched_param param = { .sched_priority = 0 }; ++ ++ sched_setscheduler(current, SCHED_NORMAL, ¶m); ++} ++ ++static int ktimer_softirqd_should_run(unsigned int cpu) ++{ ++ return current->softirqs_raised; ++} ++ ++#endif /* PREEMPT_RT_FULL */ ++/* + * Enter an interrupt context. + */ + void irq_enter(void) +@@ -330,9 +774,9 @@ void irq_enter(void) + * Prevent raise_softirq from needlessly waking up ksoftirqd + * here, as softirq will be serviced on return from interrupt. + */ +- local_bh_disable(); ++ local_bh_disable_nort(); + tick_irq_enter(); +- _local_bh_enable(); ++ _local_bh_enable_nort(); + } + + __irq_enter(); +@@ -340,6 +784,7 @@ void irq_enter(void) + + static inline void invoke_softirq(void) + { ++#ifndef CONFIG_PREEMPT_RT_FULL + if (!force_irqthreads) { + #ifdef CONFIG_HAVE_IRQ_EXIT_ON_IRQ_STACK + /* +@@ -359,6 +804,18 @@ static inline void invoke_softirq(void) + } else { + wakeup_softirqd(); + } ++#else /* PREEMPT_RT_FULL */ ++ unsigned long flags; ++ ++ local_irq_save(flags); ++ if (__this_cpu_read(ksoftirqd) && ++ __this_cpu_read(ksoftirqd)->softirqs_raised) ++ wakeup_softirqd(); ++ if (__this_cpu_read(ktimer_softirqd) && ++ __this_cpu_read(ktimer_softirqd)->softirqs_raised) ++ wakeup_timer_softirqd(); ++ local_irq_restore(flags); ++#endif + } + + static inline void tick_irq_exit(void) +@@ -395,26 +852,6 @@ void irq_exit(void) + trace_hardirq_exit(); /* must be last! */ + } + +-/* +- * This function must run with irqs disabled! +- */ +-inline void raise_softirq_irqoff(unsigned int nr) +-{ +- __raise_softirq_irqoff(nr); +- +- /* +- * If we're in an interrupt or softirq, we're done +- * (this also catches softirq-disabled code). We will +- * actually run the softirq once we return from +- * the irq or softirq. +- * +- * Otherwise we wake up ksoftirqd to make sure we +- * schedule the softirq soon. +- */ +- if (!in_interrupt()) +- wakeup_softirqd(); +-} +- + void raise_softirq(unsigned int nr) + { + unsigned long flags; +@@ -424,12 +861,6 @@ void raise_softirq(unsigned int nr) + local_irq_restore(flags); + } + +-void __raise_softirq_irqoff(unsigned int nr) +-{ +- trace_softirq_raise(nr); +- or_softirq_pending(1UL << nr); +-} +- + void open_softirq(int nr, void (*action)(struct softirq_action *)) + { + softirq_vec[nr].action = action; +@@ -446,15 +877,45 @@ struct tasklet_head { + static DEFINE_PER_CPU(struct tasklet_head, tasklet_vec); + static DEFINE_PER_CPU(struct tasklet_head, tasklet_hi_vec); + ++static void inline ++__tasklet_common_schedule(struct tasklet_struct *t, struct tasklet_head *head, unsigned int nr) ++{ ++ if (tasklet_trylock(t)) { ++again: ++ /* We may have been preempted before tasklet_trylock ++ * and __tasklet_action may have already run. ++ * So double check the sched bit while the takslet ++ * is locked before adding it to the list. ++ */ ++ if (test_bit(TASKLET_STATE_SCHED, &t->state)) { ++ t->next = NULL; ++ *head->tail = t; ++ head->tail = &(t->next); ++ raise_softirq_irqoff(nr); ++ tasklet_unlock(t); ++ } else { ++ /* This is subtle. If we hit the corner case above ++ * It is possible that we get preempted right here, ++ * and another task has successfully called ++ * tasklet_schedule(), then this function, and ++ * failed on the trylock. Thus we must be sure ++ * before releasing the tasklet lock, that the ++ * SCHED_BIT is clear. Otherwise the tasklet ++ * may get its SCHED_BIT set, but not added to the ++ * list ++ */ ++ if (!tasklet_tryunlock(t)) ++ goto again; ++ } ++ } ++} ++ + void __tasklet_schedule(struct tasklet_struct *t) + { + unsigned long flags; + + local_irq_save(flags); +- t->next = NULL; +- *__this_cpu_read(tasklet_vec.tail) = t; +- __this_cpu_write(tasklet_vec.tail, &(t->next)); +- raise_softirq_irqoff(TASKLET_SOFTIRQ); ++ __tasklet_common_schedule(t, this_cpu_ptr(&tasklet_vec), TASKLET_SOFTIRQ); + local_irq_restore(flags); + } + EXPORT_SYMBOL(__tasklet_schedule); +@@ -464,10 +925,7 @@ void __tasklet_hi_schedule(struct tasklet_struct *t) + unsigned long flags; + + local_irq_save(flags); +- t->next = NULL; +- *__this_cpu_read(tasklet_hi_vec.tail) = t; +- __this_cpu_write(tasklet_hi_vec.tail, &(t->next)); +- raise_softirq_irqoff(HI_SOFTIRQ); ++ __tasklet_common_schedule(t, this_cpu_ptr(&tasklet_hi_vec), HI_SOFTIRQ); + local_irq_restore(flags); + } + EXPORT_SYMBOL(__tasklet_hi_schedule); +@@ -476,82 +934,122 @@ void __tasklet_hi_schedule_first(struct tasklet_struct *t) + { + BUG_ON(!irqs_disabled()); + +- t->next = __this_cpu_read(tasklet_hi_vec.head); +- __this_cpu_write(tasklet_hi_vec.head, t); +- __raise_softirq_irqoff(HI_SOFTIRQ); ++ __tasklet_hi_schedule(t); + } + EXPORT_SYMBOL(__tasklet_hi_schedule_first); + +-static void tasklet_action(struct softirq_action *a) ++void tasklet_enable(struct tasklet_struct *t) + { +- struct tasklet_struct *list; ++ if (!atomic_dec_and_test(&t->count)) ++ return; ++ if (test_and_clear_bit(TASKLET_STATE_PENDING, &t->state)) ++ tasklet_schedule(t); ++} ++EXPORT_SYMBOL(tasklet_enable); + +- local_irq_disable(); +- list = __this_cpu_read(tasklet_vec.head); +- __this_cpu_write(tasklet_vec.head, NULL); +- __this_cpu_write(tasklet_vec.tail, this_cpu_ptr(&tasklet_vec.head)); +- local_irq_enable(); ++static void __tasklet_action(struct softirq_action *a, ++ struct tasklet_struct *list) ++{ ++ int loops = 1000000; + + while (list) { + struct tasklet_struct *t = list; + + list = list->next; + +- if (tasklet_trylock(t)) { +- if (!atomic_read(&t->count)) { +- if (!test_and_clear_bit(TASKLET_STATE_SCHED, +- &t->state)) +- BUG(); +- t->func(t->data); +- tasklet_unlock(t); +- continue; +- } +- tasklet_unlock(t); ++ /* ++ * Should always succeed - after a tasklist got on the ++ * list (after getting the SCHED bit set from 0 to 1), ++ * nothing but the tasklet softirq it got queued to can ++ * lock it: ++ */ ++ if (!tasklet_trylock(t)) { ++ WARN_ON(1); ++ continue; + } + +- local_irq_disable(); + t->next = NULL; +- *__this_cpu_read(tasklet_vec.tail) = t; +- __this_cpu_write(tasklet_vec.tail, &(t->next)); +- __raise_softirq_irqoff(TASKLET_SOFTIRQ); +- local_irq_enable(); ++ ++ /* ++ * If we cannot handle the tasklet because it's disabled, ++ * mark it as pending. tasklet_enable() will later ++ * re-schedule the tasklet. ++ */ ++ if (unlikely(atomic_read(&t->count))) { ++out_disabled: ++ /* implicit unlock: */ ++ wmb(); ++ t->state = TASKLET_STATEF_PENDING; ++ continue; ++ } ++ ++ /* ++ * After this point on the tasklet might be rescheduled ++ * on another CPU, but it can only be added to another ++ * CPU's tasklet list if we unlock the tasklet (which we ++ * dont do yet). ++ */ ++ if (!test_and_clear_bit(TASKLET_STATE_SCHED, &t->state)) ++ WARN_ON(1); ++ ++again: ++ t->func(t->data); ++ ++ /* ++ * Try to unlock the tasklet. We must use cmpxchg, because ++ * another CPU might have scheduled or disabled the tasklet. ++ * We only allow the STATE_RUN -> 0 transition here. ++ */ ++ while (!tasklet_tryunlock(t)) { ++ /* ++ * If it got disabled meanwhile, bail out: ++ */ ++ if (atomic_read(&t->count)) ++ goto out_disabled; ++ /* ++ * If it got scheduled meanwhile, re-execute ++ * the tasklet function: ++ */ ++ if (test_and_clear_bit(TASKLET_STATE_SCHED, &t->state)) ++ goto again; ++ if (!--loops) { ++ printk("hm, tasklet state: %08lx\n", t->state); ++ WARN_ON(1); ++ tasklet_unlock(t); ++ break; ++ } ++ } + } + } + ++static void tasklet_action(struct softirq_action *a) ++{ ++ struct tasklet_struct *list; ++ ++ local_irq_disable(); ++ ++ list = __this_cpu_read(tasklet_vec.head); ++ __this_cpu_write(tasklet_vec.head, NULL); ++ __this_cpu_write(tasklet_vec.tail, this_cpu_ptr(&tasklet_vec.head)); ++ ++ local_irq_enable(); ++ ++ __tasklet_action(a, list); ++} ++ + static void tasklet_hi_action(struct softirq_action *a) + { + struct tasklet_struct *list; + + local_irq_disable(); ++ + list = __this_cpu_read(tasklet_hi_vec.head); + __this_cpu_write(tasklet_hi_vec.head, NULL); + __this_cpu_write(tasklet_hi_vec.tail, this_cpu_ptr(&tasklet_hi_vec.head)); ++ + local_irq_enable(); + +- while (list) { +- struct tasklet_struct *t = list; +- +- list = list->next; +- +- if (tasklet_trylock(t)) { +- if (!atomic_read(&t->count)) { +- if (!test_and_clear_bit(TASKLET_STATE_SCHED, +- &t->state)) +- BUG(); +- t->func(t->data); +- tasklet_unlock(t); +- continue; +- } +- tasklet_unlock(t); +- } +- +- local_irq_disable(); +- t->next = NULL; +- *__this_cpu_read(tasklet_hi_vec.tail) = t; +- __this_cpu_write(tasklet_hi_vec.tail, &(t->next)); +- __raise_softirq_irqoff(HI_SOFTIRQ); +- local_irq_enable(); +- } ++ __tasklet_action(a, list); + } + + void tasklet_init(struct tasklet_struct *t, +@@ -572,7 +1070,7 @@ void tasklet_kill(struct tasklet_struct *t) + + while (test_and_set_bit(TASKLET_STATE_SCHED, &t->state)) { + do { +- yield(); ++ msleep(1); + } while (test_bit(TASKLET_STATE_SCHED, &t->state)); + } + tasklet_unlock_wait(t); +@@ -646,25 +1144,26 @@ void __init softirq_init(void) + open_softirq(HI_SOFTIRQ, tasklet_hi_action); + } + ++#if defined(CONFIG_SMP) || defined(CONFIG_PREEMPT_RT_FULL) ++void tasklet_unlock_wait(struct tasklet_struct *t) ++{ ++ while (test_bit(TASKLET_STATE_RUN, &(t)->state)) { ++ /* ++ * Hack for now to avoid this busy-loop: ++ */ ++#ifdef CONFIG_PREEMPT_RT_FULL ++ msleep(1); ++#else ++ barrier(); ++#endif ++ } ++} ++EXPORT_SYMBOL(tasklet_unlock_wait); ++#endif ++ + static int ksoftirqd_should_run(unsigned int cpu) + { +- return local_softirq_pending(); +-} +- +-static void run_ksoftirqd(unsigned int cpu) +-{ +- local_irq_disable(); +- if (local_softirq_pending()) { +- /* +- * We can safely run softirq on inline stack, as we are not deep +- * in the task stack here. +- */ +- __do_softirq(); +- local_irq_enable(); +- cond_resched_rcu_qs(); +- return; +- } +- local_irq_enable(); ++ return ksoftirqd_softirq_pending(); + } + + #ifdef CONFIG_HOTPLUG_CPU +@@ -746,16 +1245,31 @@ static struct notifier_block cpu_nfb = { + + static struct smp_hotplug_thread softirq_threads = { + .store = &ksoftirqd, ++ .setup = ksoftirqd_set_sched_params, + .thread_should_run = ksoftirqd_should_run, + .thread_fn = run_ksoftirqd, + .thread_comm = "ksoftirqd/%u", + }; + ++#ifdef CONFIG_PREEMPT_RT_FULL ++static struct smp_hotplug_thread softirq_timer_threads = { ++ .store = &ktimer_softirqd, ++ .setup = ktimer_softirqd_set_sched_params, ++ .cleanup = ktimer_softirqd_clr_sched_params, ++ .thread_should_run = ktimer_softirqd_should_run, ++ .thread_fn = run_ksoftirqd, ++ .thread_comm = "ktimersoftd/%u", ++}; ++#endif ++ + static __init int spawn_ksoftirqd(void) + { + register_cpu_notifier(&cpu_nfb); + + BUG_ON(smpboot_register_percpu_thread(&softirq_threads)); ++#ifdef CONFIG_PREEMPT_RT_FULL ++ BUG_ON(smpboot_register_percpu_thread(&softirq_timer_threads)); ++#endif + + return 0; + } +diff --git a/kernel/stop_machine.c b/kernel/stop_machine.c +index 4a1ca5f6da7e..3226e22b9e42 100644 +--- a/kernel/stop_machine.c ++++ b/kernel/stop_machine.c +@@ -37,7 +37,7 @@ struct cpu_stop_done { + struct cpu_stopper { + struct task_struct *thread; + +- spinlock_t lock; ++ raw_spinlock_t lock; + bool enabled; /* is this stopper enabled? */ + struct list_head works; /* list of pending works */ + +@@ -83,14 +83,14 @@ static bool cpu_stop_queue_work(unsigned int cpu, struct cpu_stop_work *work) + unsigned long flags; + bool enabled; + +- spin_lock_irqsave(&stopper->lock, flags); ++ raw_spin_lock_irqsave(&stopper->lock, flags); + enabled = stopper->enabled; + if (enabled) + __cpu_stop_queue_work(stopper, work); + else if (work->done) + cpu_stop_signal_done(work->done); +- spin_unlock_irqrestore(&stopper->lock, flags); + ++ raw_spin_unlock_irqrestore(&stopper->lock, flags); + return enabled; + } + +@@ -232,8 +232,8 @@ static int cpu_stop_queue_two_works(int cpu1, struct cpu_stop_work *work1, + int err; + + lg_double_lock(&stop_cpus_lock, cpu1, cpu2); +- spin_lock_irq(&stopper1->lock); +- spin_lock_nested(&stopper2->lock, SINGLE_DEPTH_NESTING); ++ raw_spin_lock_irq(&stopper1->lock); ++ raw_spin_lock_nested(&stopper2->lock, SINGLE_DEPTH_NESTING); + + err = -ENOENT; + if (!stopper1->enabled || !stopper2->enabled) +@@ -243,8 +243,8 @@ static int cpu_stop_queue_two_works(int cpu1, struct cpu_stop_work *work1, + __cpu_stop_queue_work(stopper1, work1); + __cpu_stop_queue_work(stopper2, work2); + unlock: +- spin_unlock(&stopper2->lock); +- spin_unlock_irq(&stopper1->lock); ++ raw_spin_unlock(&stopper2->lock); ++ raw_spin_unlock_irq(&stopper1->lock); + lg_double_unlock(&stop_cpus_lock, cpu1, cpu2); + + return err; +@@ -321,18 +321,21 @@ static DEFINE_MUTEX(stop_cpus_mutex); + + static bool queue_stop_cpus_work(const struct cpumask *cpumask, + cpu_stop_fn_t fn, void *arg, +- struct cpu_stop_done *done) ++ struct cpu_stop_done *done, bool inactive) + { + struct cpu_stop_work *work; + unsigned int cpu; + bool queued = false; + + /* +- * Disable preemption while queueing to avoid getting +- * preempted by a stopper which might wait for other stoppers +- * to enter @fn which can lead to deadlock. ++ * Make sure that all work is queued on all cpus before ++ * any of the cpus can execute it. + */ +- lg_global_lock(&stop_cpus_lock); ++ if (!inactive) ++ lg_global_lock(&stop_cpus_lock); ++ else ++ lg_global_trylock_relax(&stop_cpus_lock); ++ + for_each_cpu(cpu, cpumask) { + work = &per_cpu(cpu_stopper.stop_work, cpu); + work->fn = fn; +@@ -352,7 +355,7 @@ static int __stop_cpus(const struct cpumask *cpumask, + struct cpu_stop_done done; + + cpu_stop_init_done(&done, cpumask_weight(cpumask)); +- if (!queue_stop_cpus_work(cpumask, fn, arg, &done)) ++ if (!queue_stop_cpus_work(cpumask, fn, arg, &done, false)) + return -ENOENT; + wait_for_completion(&done.completion); + return done.ret; +@@ -433,9 +436,9 @@ static int cpu_stop_should_run(unsigned int cpu) + unsigned long flags; + int run; + +- spin_lock_irqsave(&stopper->lock, flags); ++ raw_spin_lock_irqsave(&stopper->lock, flags); + run = !list_empty(&stopper->works); +- spin_unlock_irqrestore(&stopper->lock, flags); ++ raw_spin_unlock_irqrestore(&stopper->lock, flags); + return run; + } + +@@ -446,13 +449,13 @@ static void cpu_stopper_thread(unsigned int cpu) + + repeat: + work = NULL; +- spin_lock_irq(&stopper->lock); ++ raw_spin_lock_irq(&stopper->lock); + if (!list_empty(&stopper->works)) { + work = list_first_entry(&stopper->works, + struct cpu_stop_work, list); + list_del_init(&work->list); + } +- spin_unlock_irq(&stopper->lock); ++ raw_spin_unlock_irq(&stopper->lock); + + if (work) { + cpu_stop_fn_t fn = work->fn; +@@ -460,6 +463,16 @@ static void cpu_stopper_thread(unsigned int cpu) + struct cpu_stop_done *done = work->done; + int ret; + ++ /* ++ * Wait until the stopper finished scheduling on all ++ * cpus ++ */ ++ lg_global_lock(&stop_cpus_lock); ++ /* ++ * Let other cpu threads continue as well ++ */ ++ lg_global_unlock(&stop_cpus_lock); ++ + /* cpu stop callbacks must not sleep, make in_atomic() == T */ + preempt_count_inc(); + ret = fn(arg); +@@ -526,10 +539,12 @@ static int __init cpu_stop_init(void) + for_each_possible_cpu(cpu) { + struct cpu_stopper *stopper = &per_cpu(cpu_stopper, cpu); + +- spin_lock_init(&stopper->lock); ++ raw_spin_lock_init(&stopper->lock); + INIT_LIST_HEAD(&stopper->works); + } + ++ lg_lock_init(&stop_cpus_lock, "stop_cpus_lock"); ++ + BUG_ON(smpboot_register_percpu_thread(&cpu_stop_threads)); + stop_machine_unpark(raw_smp_processor_id()); + stop_machine_initialized = true; +@@ -624,7 +639,7 @@ int stop_machine_from_inactive_cpu(cpu_stop_fn_t fn, void *data, + set_state(&msdata, MULTI_STOP_PREPARE); + cpu_stop_init_done(&done, num_active_cpus()); + queue_stop_cpus_work(cpu_active_mask, multi_cpu_stop, &msdata, +- &done); ++ &done, true); + ret = multi_cpu_stop(&msdata); + + /* Busy wait for completion. */ +diff --git a/kernel/time/hrtimer.c b/kernel/time/hrtimer.c +index 9ba7c820fc23..d85f638fd99e 100644 +--- a/kernel/time/hrtimer.c ++++ b/kernel/time/hrtimer.c +@@ -53,6 +53,7 @@ + #include <asm/uaccess.h> + + #include <trace/events/timer.h> ++#include <trace/events/hist.h> + + #include "tick-internal.h" + +@@ -695,6 +696,29 @@ static void hrtimer_switch_to_hres(void) + retrigger_next_event(NULL); + } + ++#ifdef CONFIG_PREEMPT_RT_FULL ++ ++static struct swork_event clock_set_delay_work; ++ ++static void run_clock_set_delay(struct swork_event *event) ++{ ++ clock_was_set(); ++} ++ ++void clock_was_set_delayed(void) ++{ ++ swork_queue(&clock_set_delay_work); ++} ++ ++static __init int create_clock_set_delay_thread(void) ++{ ++ WARN_ON(swork_get()); ++ INIT_SWORK(&clock_set_delay_work, run_clock_set_delay); ++ return 0; ++} ++early_initcall(create_clock_set_delay_thread); ++#else /* PREEMPT_RT_FULL */ ++ + static void clock_was_set_work(struct work_struct *work) + { + clock_was_set(); +@@ -710,6 +734,7 @@ void clock_was_set_delayed(void) + { + schedule_work(&hrtimer_work); + } ++#endif + + #else + +@@ -719,11 +744,8 @@ static inline int hrtimer_is_hres_enabled(void) { return 0; } + static inline void hrtimer_switch_to_hres(void) { } + static inline void + hrtimer_force_reprogram(struct hrtimer_cpu_base *base, int skip_equal) { } +-static inline int hrtimer_reprogram(struct hrtimer *timer, +- struct hrtimer_clock_base *base) +-{ +- return 0; +-} ++static inline void hrtimer_reprogram(struct hrtimer *timer, ++ struct hrtimer_clock_base *base) { } + static inline void hrtimer_init_hres(struct hrtimer_cpu_base *base) { } + static inline void retrigger_next_event(void *arg) { } + +@@ -855,6 +877,32 @@ u64 hrtimer_forward(struct hrtimer *timer, ktime_t now, ktime_t interval) + } + EXPORT_SYMBOL_GPL(hrtimer_forward); + ++#ifdef CONFIG_PREEMPT_RT_BASE ++# define wake_up_timer_waiters(b) wake_up(&(b)->wait) ++ ++/** ++ * hrtimer_wait_for_timer - Wait for a running timer ++ * ++ * @timer: timer to wait for ++ * ++ * The function waits in case the timers callback function is ++ * currently executed on the waitqueue of the timer base. The ++ * waitqueue is woken up after the timer callback function has ++ * finished execution. ++ */ ++void hrtimer_wait_for_timer(const struct hrtimer *timer) ++{ ++ struct hrtimer_clock_base *base = timer->base; ++ ++ if (base && base->cpu_base && !timer->irqsafe) ++ wait_event(base->cpu_base->wait, ++ !(hrtimer_callback_running(timer))); ++} ++ ++#else ++# define wake_up_timer_waiters(b) do { } while (0) ++#endif ++ + /* + * enqueue_hrtimer - internal function to (re)start a timer + * +@@ -896,6 +944,11 @@ static void __remove_hrtimer(struct hrtimer *timer, + if (!(state & HRTIMER_STATE_ENQUEUED)) + return; + ++ if (unlikely(!list_empty(&timer->cb_entry))) { ++ list_del_init(&timer->cb_entry); ++ return; ++ } ++ + if (!timerqueue_del(&base->active, &timer->node)) + cpu_base->active_bases &= ~(1 << base->index); + +@@ -991,7 +1044,16 @@ void hrtimer_start_range_ns(struct hrtimer *timer, ktime_t tim, + new_base = switch_hrtimer_base(timer, base, mode & HRTIMER_MODE_PINNED); + + timer_stats_hrtimer_set_start_info(timer); ++#ifdef CONFIG_MISSED_TIMER_OFFSETS_HIST ++ { ++ ktime_t now = new_base->get_time(); + ++ if (ktime_to_ns(tim) < ktime_to_ns(now)) ++ timer->praecox = now; ++ else ++ timer->praecox = ktime_set(0, 0); ++ } ++#endif + leftmost = enqueue_hrtimer(timer, new_base); + if (!leftmost) + goto unlock; +@@ -1063,7 +1125,7 @@ int hrtimer_cancel(struct hrtimer *timer) + + if (ret >= 0) + return ret; +- cpu_relax(); ++ hrtimer_wait_for_timer(timer); + } + } + EXPORT_SYMBOL_GPL(hrtimer_cancel); +@@ -1127,6 +1189,7 @@ static void __hrtimer_init(struct hrtimer *timer, clockid_t clock_id, + + base = hrtimer_clockid_to_base(clock_id); + timer->base = &cpu_base->clock_base[base]; ++ INIT_LIST_HEAD(&timer->cb_entry); + timerqueue_init(&timer->node); + + #ifdef CONFIG_TIMER_STATS +@@ -1167,6 +1230,7 @@ bool hrtimer_active(const struct hrtimer *timer) + seq = raw_read_seqcount_begin(&cpu_base->seq); + + if (timer->state != HRTIMER_STATE_INACTIVE || ++ cpu_base->running_soft == timer || + cpu_base->running == timer) + return true; + +@@ -1265,10 +1329,112 @@ static void __run_hrtimer(struct hrtimer_cpu_base *cpu_base, + cpu_base->running = NULL; + } + ++#ifdef CONFIG_PREEMPT_RT_BASE ++static void hrtimer_rt_reprogram(int restart, struct hrtimer *timer, ++ struct hrtimer_clock_base *base) ++{ ++ int leftmost; ++ ++ if (restart != HRTIMER_NORESTART && ++ !(timer->state & HRTIMER_STATE_ENQUEUED)) { ++ ++ leftmost = enqueue_hrtimer(timer, base); ++ if (!leftmost) ++ return; ++#ifdef CONFIG_HIGH_RES_TIMERS ++ if (!hrtimer_is_hres_active(timer)) { ++ /* ++ * Kick to reschedule the next tick to handle the new timer ++ * on dynticks target. ++ */ ++ if (base->cpu_base->nohz_active) ++ wake_up_nohz_cpu(base->cpu_base->cpu); ++ } else { ++ ++ hrtimer_reprogram(timer, base); ++ } ++#endif ++ } ++} ++ ++/* ++ * The changes in mainline which removed the callback modes from ++ * hrtimer are not yet working with -rt. The non wakeup_process() ++ * based callbacks which involve sleeping locks need to be treated ++ * seperately. ++ */ ++static void hrtimer_rt_run_pending(void) ++{ ++ enum hrtimer_restart (*fn)(struct hrtimer *); ++ struct hrtimer_cpu_base *cpu_base; ++ struct hrtimer_clock_base *base; ++ struct hrtimer *timer; ++ int index, restart; ++ ++ local_irq_disable(); ++ cpu_base = &per_cpu(hrtimer_bases, smp_processor_id()); ++ ++ raw_spin_lock(&cpu_base->lock); ++ ++ for (index = 0; index < HRTIMER_MAX_CLOCK_BASES; index++) { ++ base = &cpu_base->clock_base[index]; ++ ++ while (!list_empty(&base->expired)) { ++ timer = list_first_entry(&base->expired, ++ struct hrtimer, cb_entry); ++ ++ /* ++ * Same as the above __run_hrtimer function ++ * just we run with interrupts enabled. ++ */ ++ debug_deactivate(timer); ++ cpu_base->running_soft = timer; ++ raw_write_seqcount_barrier(&cpu_base->seq); ++ ++ __remove_hrtimer(timer, base, HRTIMER_STATE_INACTIVE, 0); ++ timer_stats_account_hrtimer(timer); ++ fn = timer->function; ++ ++ raw_spin_unlock_irq(&cpu_base->lock); ++ restart = fn(timer); ++ raw_spin_lock_irq(&cpu_base->lock); ++ ++ hrtimer_rt_reprogram(restart, timer, base); ++ raw_write_seqcount_barrier(&cpu_base->seq); ++ ++ WARN_ON_ONCE(cpu_base->running_soft != timer); ++ cpu_base->running_soft = NULL; ++ } ++ } ++ ++ raw_spin_unlock_irq(&cpu_base->lock); ++ ++ wake_up_timer_waiters(cpu_base); ++} ++ ++static int hrtimer_rt_defer(struct hrtimer *timer) ++{ ++ if (timer->irqsafe) ++ return 0; ++ ++ __remove_hrtimer(timer, timer->base, timer->state, 0); ++ list_add_tail(&timer->cb_entry, &timer->base->expired); ++ return 1; ++} ++ ++#else ++ ++static inline int hrtimer_rt_defer(struct hrtimer *timer) { return 0; } ++ ++#endif ++ ++static enum hrtimer_restart hrtimer_wakeup(struct hrtimer *timer); ++ + static void __hrtimer_run_queues(struct hrtimer_cpu_base *cpu_base, ktime_t now) + { + struct hrtimer_clock_base *base = cpu_base->clock_base; + unsigned int active = cpu_base->active_bases; ++ int raise = 0; + + for (; active; base++, active >>= 1) { + struct timerqueue_node *node; +@@ -1284,6 +1450,15 @@ static void __hrtimer_run_queues(struct hrtimer_cpu_base *cpu_base, ktime_t now) + + timer = container_of(node, struct hrtimer, node); + ++ trace_hrtimer_interrupt(raw_smp_processor_id(), ++ ktime_to_ns(ktime_sub(ktime_to_ns(timer->praecox) ? ++ timer->praecox : hrtimer_get_expires(timer), ++ basenow)), ++ current, ++ timer->function == hrtimer_wakeup ? ++ container_of(timer, struct hrtimer_sleeper, ++ timer)->task : NULL); ++ + /* + * The immediate goal for using the softexpires is + * minimizing wakeups, not running timers at the +@@ -1299,9 +1474,14 @@ static void __hrtimer_run_queues(struct hrtimer_cpu_base *cpu_base, ktime_t now) + if (basenow.tv64 < hrtimer_get_softexpires_tv64(timer)) + break; + +- __run_hrtimer(cpu_base, base, timer, &basenow); ++ if (!hrtimer_rt_defer(timer)) ++ __run_hrtimer(cpu_base, base, timer, &basenow); ++ else ++ raise = 1; + } + } ++ if (raise) ++ raise_softirq_irqoff(HRTIMER_SOFTIRQ); + } + + #ifdef CONFIG_HIGH_RES_TIMERS +@@ -1464,16 +1644,18 @@ static enum hrtimer_restart hrtimer_wakeup(struct hrtimer *timer) + void hrtimer_init_sleeper(struct hrtimer_sleeper *sl, struct task_struct *task) + { + sl->timer.function = hrtimer_wakeup; ++ sl->timer.irqsafe = 1; + sl->task = task; + } + EXPORT_SYMBOL_GPL(hrtimer_init_sleeper); + +-static int __sched do_nanosleep(struct hrtimer_sleeper *t, enum hrtimer_mode mode) ++static int __sched do_nanosleep(struct hrtimer_sleeper *t, enum hrtimer_mode mode, ++ unsigned long state) + { + hrtimer_init_sleeper(t, current); + + do { +- set_current_state(TASK_INTERRUPTIBLE); ++ set_current_state(state); + hrtimer_start_expires(&t->timer, mode); + + if (likely(t->task)) +@@ -1515,7 +1697,8 @@ long __sched hrtimer_nanosleep_restart(struct restart_block *restart) + HRTIMER_MODE_ABS); + hrtimer_set_expires_tv64(&t.timer, restart->nanosleep.expires); + +- if (do_nanosleep(&t, HRTIMER_MODE_ABS)) ++ /* cpu_chill() does not care about restart state. */ ++ if (do_nanosleep(&t, HRTIMER_MODE_ABS, TASK_INTERRUPTIBLE)) + goto out; + + rmtp = restart->nanosleep.rmtp; +@@ -1532,8 +1715,10 @@ long __sched hrtimer_nanosleep_restart(struct restart_block *restart) + return ret; + } + +-long hrtimer_nanosleep(struct timespec *rqtp, struct timespec __user *rmtp, +- const enum hrtimer_mode mode, const clockid_t clockid) ++static long ++__hrtimer_nanosleep(struct timespec *rqtp, struct timespec __user *rmtp, ++ const enum hrtimer_mode mode, const clockid_t clockid, ++ unsigned long state) + { + struct restart_block *restart; + struct hrtimer_sleeper t; +@@ -1546,7 +1731,7 @@ long hrtimer_nanosleep(struct timespec *rqtp, struct timespec __user *rmtp, + + hrtimer_init_on_stack(&t.timer, clockid, mode); + hrtimer_set_expires_range_ns(&t.timer, timespec_to_ktime(*rqtp), slack); +- if (do_nanosleep(&t, mode)) ++ if (do_nanosleep(&t, mode, state)) + goto out; + + /* Absolute timers do not update the rmtp value and restart: */ +@@ -1573,6 +1758,12 @@ long hrtimer_nanosleep(struct timespec *rqtp, struct timespec __user *rmtp, + return ret; + } + ++long hrtimer_nanosleep(struct timespec *rqtp, struct timespec __user *rmtp, ++ const enum hrtimer_mode mode, const clockid_t clockid) ++{ ++ return __hrtimer_nanosleep(rqtp, rmtp, mode, clockid, TASK_INTERRUPTIBLE); ++} ++ + SYSCALL_DEFINE2(nanosleep, struct timespec __user *, rqtp, + struct timespec __user *, rmtp) + { +@@ -1587,6 +1778,26 @@ SYSCALL_DEFINE2(nanosleep, struct timespec __user *, rqtp, + return hrtimer_nanosleep(&tu, rmtp, HRTIMER_MODE_REL, CLOCK_MONOTONIC); + } + ++#ifdef CONFIG_PREEMPT_RT_FULL ++/* ++ * Sleep for 1 ms in hope whoever holds what we want will let it go. ++ */ ++void cpu_chill(void) ++{ ++ struct timespec tu = { ++ .tv_nsec = NSEC_PER_MSEC, ++ }; ++ unsigned int freeze_flag = current->flags & PF_NOFREEZE; ++ ++ current->flags |= PF_NOFREEZE; ++ __hrtimer_nanosleep(&tu, NULL, HRTIMER_MODE_REL, CLOCK_MONOTONIC, ++ TASK_UNINTERRUPTIBLE); ++ if (!freeze_flag) ++ current->flags &= ~PF_NOFREEZE; ++} ++EXPORT_SYMBOL(cpu_chill); ++#endif ++ + /* + * Functions related to boot-time initialization: + */ +@@ -1598,10 +1809,14 @@ int hrtimers_prepare_cpu(unsigned int cpu) + for (i = 0; i < HRTIMER_MAX_CLOCK_BASES; i++) { + cpu_base->clock_base[i].cpu_base = cpu_base; + timerqueue_init_head(&cpu_base->clock_base[i].active); ++ INIT_LIST_HEAD(&cpu_base->clock_base[i].expired); + } + + cpu_base->cpu = cpu; + hrtimer_init_hres(cpu_base); ++#ifdef CONFIG_PREEMPT_RT_BASE ++ init_waitqueue_head(&cpu_base->wait); ++#endif + return 0; + } + +@@ -1671,9 +1886,26 @@ int hrtimers_dead_cpu(unsigned int scpu) + + #endif /* CONFIG_HOTPLUG_CPU */ + ++#ifdef CONFIG_PREEMPT_RT_BASE ++ ++static void run_hrtimer_softirq(struct softirq_action *h) ++{ ++ hrtimer_rt_run_pending(); ++} ++ ++static void hrtimers_open_softirq(void) ++{ ++ open_softirq(HRTIMER_SOFTIRQ, run_hrtimer_softirq); ++} ++ ++#else ++static void hrtimers_open_softirq(void) { } ++#endif ++ + void __init hrtimers_init(void) + { + hrtimers_prepare_cpu(smp_processor_id()); ++ hrtimers_open_softirq(); + } + + /** +diff --git a/kernel/time/itimer.c b/kernel/time/itimer.c +index 1d5c7204ddc9..184de6751180 100644 +--- a/kernel/time/itimer.c ++++ b/kernel/time/itimer.c +@@ -213,6 +213,7 @@ int do_setitimer(int which, struct itimerval *value, struct itimerval *ovalue) + /* We are sharing ->siglock with it_real_fn() */ + if (hrtimer_try_to_cancel(timer) < 0) { + spin_unlock_irq(&tsk->sighand->siglock); ++ hrtimer_wait_for_timer(&tsk->signal->real_timer); + goto again; + } + expires = timeval_to_ktime(value->it_value); +diff --git a/kernel/time/jiffies.c b/kernel/time/jiffies.c +index 555e21f7b966..a5d6435fabbb 100644 +--- a/kernel/time/jiffies.c ++++ b/kernel/time/jiffies.c +@@ -74,7 +74,8 @@ static struct clocksource clocksource_jiffies = { + .max_cycles = 10, + }; + +-__cacheline_aligned_in_smp DEFINE_SEQLOCK(jiffies_lock); ++__cacheline_aligned_in_smp DEFINE_RAW_SPINLOCK(jiffies_lock); ++__cacheline_aligned_in_smp seqcount_t jiffies_seq; + + #if (BITS_PER_LONG < 64) + u64 get_jiffies_64(void) +@@ -83,9 +84,9 @@ u64 get_jiffies_64(void) + u64 ret; + + do { +- seq = read_seqbegin(&jiffies_lock); ++ seq = read_seqcount_begin(&jiffies_seq); + ret = jiffies_64; +- } while (read_seqretry(&jiffies_lock, seq)); ++ } while (read_seqcount_retry(&jiffies_seq, seq)); + return ret; + } + EXPORT_SYMBOL(get_jiffies_64); +diff --git a/kernel/time/ntp.c b/kernel/time/ntp.c +index 6df8927c58a5..05b7391bf9bd 100644 +--- a/kernel/time/ntp.c ++++ b/kernel/time/ntp.c +@@ -17,6 +17,7 @@ + #include <linux/module.h> + #include <linux/rtc.h> + #include <linux/math64.h> ++#include <linux/swork.h> + + #include "ntp_internal.h" + #include "timekeeping_internal.h" +@@ -568,10 +569,35 @@ static void sync_cmos_clock(struct work_struct *work) + &sync_cmos_work, timespec64_to_jiffies(&next)); + } + ++#ifdef CONFIG_PREEMPT_RT_FULL ++ ++static void run_clock_set_delay(struct swork_event *event) ++{ ++ queue_delayed_work(system_power_efficient_wq, &sync_cmos_work, 0); ++} ++ ++static struct swork_event ntp_cmos_swork; ++ ++void ntp_notify_cmos_timer(void) ++{ ++ swork_queue(&ntp_cmos_swork); ++} ++ ++static __init int create_cmos_delay_thread(void) ++{ ++ WARN_ON(swork_get()); ++ INIT_SWORK(&ntp_cmos_swork, run_clock_set_delay); ++ return 0; ++} ++early_initcall(create_cmos_delay_thread); ++ ++#else ++ + void ntp_notify_cmos_timer(void) + { + queue_delayed_work(system_power_efficient_wq, &sync_cmos_work, 0); + } ++#endif /* CONFIG_PREEMPT_RT_FULL */ + + #else + void ntp_notify_cmos_timer(void) { } +diff --git a/kernel/time/posix-cpu-timers.c b/kernel/time/posix-cpu-timers.c +index 39008d78927a..633f4eaca9e7 100644 +--- a/kernel/time/posix-cpu-timers.c ++++ b/kernel/time/posix-cpu-timers.c +@@ -3,6 +3,7 @@ + */ + + #include <linux/sched.h> ++#include <linux/sched/rt.h> + #include <linux/posix-timers.h> + #include <linux/errno.h> + #include <linux/math64.h> +@@ -620,7 +621,7 @@ static int posix_cpu_timer_set(struct k_itimer *timer, int timer_flags, + /* + * Disarm any old timer after extracting its expiry time. + */ +- WARN_ON_ONCE(!irqs_disabled()); ++ WARN_ON_ONCE_NONRT(!irqs_disabled()); + + ret = 0; + old_incr = timer->it.cpu.incr; +@@ -1064,7 +1065,7 @@ void posix_cpu_timer_schedule(struct k_itimer *timer) + /* + * Now re-arm for the new expiry time. + */ +- WARN_ON_ONCE(!irqs_disabled()); ++ WARN_ON_ONCE_NONRT(!irqs_disabled()); + arm_timer(timer); + unlock_task_sighand(p, &flags); + +@@ -1153,13 +1154,13 @@ static inline int fastpath_timer_check(struct task_struct *tsk) + * already updated our counts. We need to check if any timers fire now. + * Interrupts are disabled. + */ +-void run_posix_cpu_timers(struct task_struct *tsk) ++static void __run_posix_cpu_timers(struct task_struct *tsk) + { + LIST_HEAD(firing); + struct k_itimer *timer, *next; + unsigned long flags; + +- WARN_ON_ONCE(!irqs_disabled()); ++ WARN_ON_ONCE_NONRT(!irqs_disabled()); + + /* + * The fast path checks that there are no expired thread or thread +@@ -1213,6 +1214,190 @@ void run_posix_cpu_timers(struct task_struct *tsk) + } + } + ++#ifdef CONFIG_PREEMPT_RT_BASE ++#include <linux/kthread.h> ++#include <linux/cpu.h> ++DEFINE_PER_CPU(struct task_struct *, posix_timer_task); ++DEFINE_PER_CPU(struct task_struct *, posix_timer_tasklist); ++ ++static int posix_cpu_timers_thread(void *data) ++{ ++ int cpu = (long)data; ++ ++ BUG_ON(per_cpu(posix_timer_task,cpu) != current); ++ ++ while (!kthread_should_stop()) { ++ struct task_struct *tsk = NULL; ++ struct task_struct *next = NULL; ++ ++ if (cpu_is_offline(cpu)) ++ goto wait_to_die; ++ ++ /* grab task list */ ++ raw_local_irq_disable(); ++ tsk = per_cpu(posix_timer_tasklist, cpu); ++ per_cpu(posix_timer_tasklist, cpu) = NULL; ++ raw_local_irq_enable(); ++ ++ /* its possible the list is empty, just return */ ++ if (!tsk) { ++ set_current_state(TASK_INTERRUPTIBLE); ++ schedule(); ++ __set_current_state(TASK_RUNNING); ++ continue; ++ } ++ ++ /* Process task list */ ++ while (1) { ++ /* save next */ ++ next = tsk->posix_timer_list; ++ ++ /* run the task timers, clear its ptr and ++ * unreference it ++ */ ++ __run_posix_cpu_timers(tsk); ++ tsk->posix_timer_list = NULL; ++ put_task_struct(tsk); ++ ++ /* check if this is the last on the list */ ++ if (next == tsk) ++ break; ++ tsk = next; ++ } ++ } ++ return 0; ++ ++wait_to_die: ++ /* Wait for kthread_stop */ ++ set_current_state(TASK_INTERRUPTIBLE); ++ while (!kthread_should_stop()) { ++ schedule(); ++ set_current_state(TASK_INTERRUPTIBLE); ++ } ++ __set_current_state(TASK_RUNNING); ++ return 0; ++} ++ ++static inline int __fastpath_timer_check(struct task_struct *tsk) ++{ ++ /* tsk == current, ensure it is safe to use ->signal/sighand */ ++ if (unlikely(tsk->exit_state)) ++ return 0; ++ ++ if (!task_cputime_zero(&tsk->cputime_expires)) ++ return 1; ++ ++ if (!task_cputime_zero(&tsk->signal->cputime_expires)) ++ return 1; ++ ++ return 0; ++} ++ ++void run_posix_cpu_timers(struct task_struct *tsk) ++{ ++ unsigned long cpu = smp_processor_id(); ++ struct task_struct *tasklist; ++ ++ BUG_ON(!irqs_disabled()); ++ if(!per_cpu(posix_timer_task, cpu)) ++ return; ++ /* get per-cpu references */ ++ tasklist = per_cpu(posix_timer_tasklist, cpu); ++ ++ /* check to see if we're already queued */ ++ if (!tsk->posix_timer_list && __fastpath_timer_check(tsk)) { ++ get_task_struct(tsk); ++ if (tasklist) { ++ tsk->posix_timer_list = tasklist; ++ } else { ++ /* ++ * The list is terminated by a self-pointing ++ * task_struct ++ */ ++ tsk->posix_timer_list = tsk; ++ } ++ per_cpu(posix_timer_tasklist, cpu) = tsk; ++ ++ wake_up_process(per_cpu(posix_timer_task, cpu)); ++ } ++} ++ ++/* ++ * posix_cpu_thread_call - callback that gets triggered when a CPU is added. ++ * Here we can start up the necessary migration thread for the new CPU. ++ */ ++static int posix_cpu_thread_call(struct notifier_block *nfb, ++ unsigned long action, void *hcpu) ++{ ++ int cpu = (long)hcpu; ++ struct task_struct *p; ++ struct sched_param param; ++ ++ switch (action) { ++ case CPU_UP_PREPARE: ++ p = kthread_create(posix_cpu_timers_thread, hcpu, ++ "posixcputmr/%d",cpu); ++ if (IS_ERR(p)) ++ return NOTIFY_BAD; ++ p->flags |= PF_NOFREEZE; ++ kthread_bind(p, cpu); ++ /* Must be high prio to avoid getting starved */ ++ param.sched_priority = MAX_RT_PRIO-1; ++ sched_setscheduler(p, SCHED_FIFO, ¶m); ++ per_cpu(posix_timer_task,cpu) = p; ++ break; ++ case CPU_ONLINE: ++ /* Strictly unneccessary, as first user will wake it. */ ++ wake_up_process(per_cpu(posix_timer_task,cpu)); ++ break; ++#ifdef CONFIG_HOTPLUG_CPU ++ case CPU_UP_CANCELED: ++ /* Unbind it from offline cpu so it can run. Fall thru. */ ++ kthread_bind(per_cpu(posix_timer_task, cpu), ++ cpumask_any(cpu_online_mask)); ++ kthread_stop(per_cpu(posix_timer_task,cpu)); ++ per_cpu(posix_timer_task,cpu) = NULL; ++ break; ++ case CPU_DEAD: ++ kthread_stop(per_cpu(posix_timer_task,cpu)); ++ per_cpu(posix_timer_task,cpu) = NULL; ++ break; ++#endif ++ } ++ return NOTIFY_OK; ++} ++ ++/* Register at highest priority so that task migration (migrate_all_tasks) ++ * happens before everything else. ++ */ ++static struct notifier_block posix_cpu_thread_notifier = { ++ .notifier_call = posix_cpu_thread_call, ++ .priority = 10 ++}; ++ ++static int __init posix_cpu_thread_init(void) ++{ ++ void *hcpu = (void *)(long)smp_processor_id(); ++ /* Start one for boot CPU. */ ++ unsigned long cpu; ++ ++ /* init the per-cpu posix_timer_tasklets */ ++ for_each_possible_cpu(cpu) ++ per_cpu(posix_timer_tasklist, cpu) = NULL; ++ ++ posix_cpu_thread_call(&posix_cpu_thread_notifier, CPU_UP_PREPARE, hcpu); ++ posix_cpu_thread_call(&posix_cpu_thread_notifier, CPU_ONLINE, hcpu); ++ register_cpu_notifier(&posix_cpu_thread_notifier); ++ return 0; ++} ++early_initcall(posix_cpu_thread_init); ++#else /* CONFIG_PREEMPT_RT_BASE */ ++void run_posix_cpu_timers(struct task_struct *tsk) ++{ ++ __run_posix_cpu_timers(tsk); ++} ++#endif /* CONFIG_PREEMPT_RT_BASE */ ++ + /* + * Set one of the process-wide special case CPU timers or RLIMIT_CPU. + * The tsk->sighand->siglock must be held by the caller. +diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c +index f2826c35e918..464a98155a0e 100644 +--- a/kernel/time/posix-timers.c ++++ b/kernel/time/posix-timers.c +@@ -506,6 +506,7 @@ static enum hrtimer_restart posix_timer_fn(struct hrtimer *timer) + static struct pid *good_sigevent(sigevent_t * event) + { + struct task_struct *rtn = current->group_leader; ++ int sig = event->sigev_signo; + + if ((event->sigev_notify & SIGEV_THREAD_ID ) && + (!(rtn = find_task_by_vpid(event->sigev_notify_thread_id)) || +@@ -514,7 +515,8 @@ static struct pid *good_sigevent(sigevent_t * event) + return NULL; + + if (((event->sigev_notify & ~SIGEV_THREAD_ID) != SIGEV_NONE) && +- ((event->sigev_signo <= 0) || (event->sigev_signo > SIGRTMAX))) ++ (sig <= 0 || sig > SIGRTMAX || sig_kernel_only(sig) || ++ sig_kernel_coredump(sig))) + return NULL; + + return task_pid(rtn); +@@ -826,6 +828,20 @@ SYSCALL_DEFINE1(timer_getoverrun, timer_t, timer_id) + return overrun; + } + ++/* ++ * Protected by RCU! ++ */ ++static void timer_wait_for_callback(struct k_clock *kc, struct k_itimer *timr) ++{ ++#ifdef CONFIG_PREEMPT_RT_FULL ++ if (kc->timer_set == common_timer_set) ++ hrtimer_wait_for_timer(&timr->it.real.timer); ++ else ++ /* FIXME: Whacky hack for posix-cpu-timers */ ++ schedule_timeout(1); ++#endif ++} ++ + /* Set a POSIX.1b interval timer. */ + /* timr->it_lock is taken. */ + static int +@@ -903,6 +919,7 @@ SYSCALL_DEFINE4(timer_settime, timer_t, timer_id, int, flags, + if (!timr) + return -EINVAL; + ++ rcu_read_lock(); + kc = clockid_to_kclock(timr->it_clock); + if (WARN_ON_ONCE(!kc || !kc->timer_set)) + error = -EINVAL; +@@ -911,9 +928,12 @@ SYSCALL_DEFINE4(timer_settime, timer_t, timer_id, int, flags, + + unlock_timer(timr, flag); + if (error == TIMER_RETRY) { ++ timer_wait_for_callback(kc, timr); + rtn = NULL; // We already got the old time... ++ rcu_read_unlock(); + goto retry; + } ++ rcu_read_unlock(); + + if (old_setting && !error && + copy_to_user(old_setting, &old_spec, sizeof (old_spec))) +@@ -951,10 +971,15 @@ SYSCALL_DEFINE1(timer_delete, timer_t, timer_id) + if (!timer) + return -EINVAL; + ++ rcu_read_lock(); + if (timer_delete_hook(timer) == TIMER_RETRY) { + unlock_timer(timer, flags); ++ timer_wait_for_callback(clockid_to_kclock(timer->it_clock), ++ timer); ++ rcu_read_unlock(); + goto retry_delete; + } ++ rcu_read_unlock(); + + spin_lock(¤t->sighand->siglock); + list_del(&timer->list); +@@ -980,8 +1005,18 @@ static void itimer_delete(struct k_itimer *timer) + retry_delete: + spin_lock_irqsave(&timer->it_lock, flags); + +- if (timer_delete_hook(timer) == TIMER_RETRY) { ++ /* On RT we can race with a deletion */ ++ if (!timer->it_signal) { + unlock_timer(timer, flags); ++ return; ++ } ++ ++ if (timer_delete_hook(timer) == TIMER_RETRY) { ++ rcu_read_lock(); ++ unlock_timer(timer, flags); ++ timer_wait_for_callback(clockid_to_kclock(timer->it_clock), ++ timer); ++ rcu_read_unlock(); + goto retry_delete; + } + list_del(&timer->list); +diff --git a/kernel/time/tick-broadcast-hrtimer.c b/kernel/time/tick-broadcast-hrtimer.c +index 690b797f522e..fe8ba1619879 100644 +--- a/kernel/time/tick-broadcast-hrtimer.c ++++ b/kernel/time/tick-broadcast-hrtimer.c +@@ -107,5 +107,6 @@ void tick_setup_hrtimer_broadcast(void) + { + hrtimer_init(&bctimer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); + bctimer.function = bc_handler; ++ bctimer.irqsafe = true; + clockevents_register_device(&ce_broadcast_hrtimer); + } +diff --git a/kernel/time/tick-common.c b/kernel/time/tick-common.c +index 4fcd99e12aa0..5a47f2e98faf 100644 +--- a/kernel/time/tick-common.c ++++ b/kernel/time/tick-common.c +@@ -79,13 +79,15 @@ int tick_is_oneshot_available(void) + static void tick_periodic(int cpu) + { + if (tick_do_timer_cpu == cpu) { +- write_seqlock(&jiffies_lock); ++ raw_spin_lock(&jiffies_lock); ++ write_seqcount_begin(&jiffies_seq); + + /* Keep track of the next tick event */ + tick_next_period = ktime_add(tick_next_period, tick_period); + + do_timer(1); +- write_sequnlock(&jiffies_lock); ++ write_seqcount_end(&jiffies_seq); ++ raw_spin_unlock(&jiffies_lock); + update_wall_time(); + } + +@@ -157,9 +159,9 @@ void tick_setup_periodic(struct clock_event_device *dev, int broadcast) + ktime_t next; + + do { +- seq = read_seqbegin(&jiffies_lock); ++ seq = read_seqcount_begin(&jiffies_seq); + next = tick_next_period; +- } while (read_seqretry(&jiffies_lock, seq)); ++ } while (read_seqcount_retry(&jiffies_seq, seq)); + + clockevents_switch_state(dev, CLOCK_EVT_STATE_ONESHOT); + +diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c +index 2ec7c00228f3..c1b30b8c671a 100644 +--- a/kernel/time/tick-sched.c ++++ b/kernel/time/tick-sched.c +@@ -62,7 +62,8 @@ static void tick_do_update_jiffies64(ktime_t now) + return; + + /* Reevaluate with jiffies_lock held */ +- write_seqlock(&jiffies_lock); ++ raw_spin_lock(&jiffies_lock); ++ write_seqcount_begin(&jiffies_seq); + + delta = ktime_sub(now, last_jiffies_update); + if (delta.tv64 >= tick_period.tv64) { +@@ -85,10 +86,12 @@ static void tick_do_update_jiffies64(ktime_t now) + /* Keep the tick_next_period variable up to date */ + tick_next_period = ktime_add(last_jiffies_update, tick_period); + } else { +- write_sequnlock(&jiffies_lock); ++ write_seqcount_end(&jiffies_seq); ++ raw_spin_unlock(&jiffies_lock); + return; + } +- write_sequnlock(&jiffies_lock); ++ write_seqcount_end(&jiffies_seq); ++ raw_spin_unlock(&jiffies_lock); + update_wall_time(); + } + +@@ -99,12 +102,14 @@ static ktime_t tick_init_jiffy_update(void) + { + ktime_t period; + +- write_seqlock(&jiffies_lock); ++ raw_spin_lock(&jiffies_lock); ++ write_seqcount_begin(&jiffies_seq); + /* Did we start the jiffies update yet ? */ + if (last_jiffies_update.tv64 == 0) + last_jiffies_update = tick_next_period; + period = last_jiffies_update; +- write_sequnlock(&jiffies_lock); ++ write_seqcount_end(&jiffies_seq); ++ raw_spin_unlock(&jiffies_lock); + return period; + } + +@@ -212,6 +217,7 @@ static void nohz_full_kick_func(struct irq_work *work) + + static DEFINE_PER_CPU(struct irq_work, nohz_full_kick_work) = { + .func = nohz_full_kick_func, ++ .flags = IRQ_WORK_HARD_IRQ, + }; + + /* +@@ -670,10 +676,10 @@ static ktime_t tick_nohz_stop_sched_tick(struct tick_sched *ts, + + /* Read jiffies and the time when jiffies were updated last */ + do { +- seq = read_seqbegin(&jiffies_lock); ++ seq = read_seqcount_begin(&jiffies_seq); + basemono = last_jiffies_update.tv64; + basejiff = jiffies; +- } while (read_seqretry(&jiffies_lock, seq)); ++ } while (read_seqcount_retry(&jiffies_seq, seq)); + ts->last_jiffies = basejiff; + + if (rcu_needs_cpu(basemono, &next_rcu) || +@@ -874,14 +880,7 @@ static bool can_stop_idle_tick(int cpu, struct tick_sched *ts) + return false; + + if (unlikely(local_softirq_pending() && cpu_online(cpu))) { +- static int ratelimit; +- +- if (ratelimit < 10 && +- (local_softirq_pending() & SOFTIRQ_STOP_IDLE_MASK)) { +- pr_warn("NOHZ: local_softirq_pending %02x\n", +- (unsigned int) local_softirq_pending()); +- ratelimit++; +- } ++ softirq_check_pending_idle(); + return false; + } + +@@ -1190,6 +1189,7 @@ void tick_setup_sched_timer(void) + * Emulate tick processing via per-CPU hrtimers: + */ + hrtimer_init(&ts->sched_timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); ++ ts->sched_timer.irqsafe = 1; + ts->sched_timer.function = tick_sched_timer; + + /* Get the next period (per-CPU) */ +diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c +index 37dec7e3db43..fa8d90d2acc3 100644 +--- a/kernel/time/timekeeping.c ++++ b/kernel/time/timekeeping.c +@@ -2328,8 +2328,10 @@ EXPORT_SYMBOL(hardpps); + */ + void xtime_update(unsigned long ticks) + { +- write_seqlock(&jiffies_lock); ++ raw_spin_lock(&jiffies_lock); ++ write_seqcount_begin(&jiffies_seq); + do_timer(ticks); +- write_sequnlock(&jiffies_lock); ++ write_seqcount_end(&jiffies_seq); ++ raw_spin_unlock(&jiffies_lock); + update_wall_time(); + } +diff --git a/kernel/time/timekeeping.h b/kernel/time/timekeeping.h +index 704f595ce83f..763a3e5121ff 100644 +--- a/kernel/time/timekeeping.h ++++ b/kernel/time/timekeeping.h +@@ -19,7 +19,8 @@ extern void timekeeping_resume(void); + extern void do_timer(unsigned long ticks); + extern void update_wall_time(void); + +-extern seqlock_t jiffies_lock; ++extern raw_spinlock_t jiffies_lock; ++extern seqcount_t jiffies_seq; + + #define CS_NAME_LEN 32 + +diff --git a/kernel/time/timer.c b/kernel/time/timer.c +index 32bf6f75a8fe..ba53447a03f5 100644 +--- a/kernel/time/timer.c ++++ b/kernel/time/timer.c +@@ -193,8 +193,11 @@ EXPORT_SYMBOL(jiffies_64); + #endif + + struct timer_base { +- spinlock_t lock; ++ raw_spinlock_t lock; + struct timer_list *running_timer; ++#ifdef CONFIG_PREEMPT_RT_FULL ++ struct swait_queue_head wait_for_running_timer; ++#endif + unsigned long clk; + unsigned long next_expiry; + unsigned int cpu; +@@ -947,10 +950,10 @@ static struct timer_base *lock_timer_base(struct timer_list *timer, + + if (!(tf & TIMER_MIGRATING)) { + base = get_timer_base(tf); +- spin_lock_irqsave(&base->lock, *flags); ++ raw_spin_lock_irqsave(&base->lock, *flags); + if (timer->flags == tf) + return base; +- spin_unlock_irqrestore(&base->lock, *flags); ++ raw_spin_unlock_irqrestore(&base->lock, *flags); + } + cpu_relax(); + } +@@ -1017,9 +1020,9 @@ __mod_timer(struct timer_list *timer, unsigned long expires, bool pending_only) + /* See the comment in lock_timer_base() */ + timer->flags |= TIMER_MIGRATING; + +- spin_unlock(&base->lock); ++ raw_spin_unlock(&base->lock); + base = new_base; +- spin_lock(&base->lock); ++ raw_spin_lock(&base->lock); + WRITE_ONCE(timer->flags, + (timer->flags & ~TIMER_BASEMASK) | base->cpu); + } +@@ -1040,7 +1043,7 @@ __mod_timer(struct timer_list *timer, unsigned long expires, bool pending_only) + } + + out_unlock: +- spin_unlock_irqrestore(&base->lock, flags); ++ raw_spin_unlock_irqrestore(&base->lock, flags); + + return ret; + } +@@ -1134,19 +1137,46 @@ void add_timer_on(struct timer_list *timer, int cpu) + if (base != new_base) { + timer->flags |= TIMER_MIGRATING; + +- spin_unlock(&base->lock); ++ raw_spin_unlock(&base->lock); + base = new_base; +- spin_lock(&base->lock); ++ raw_spin_lock(&base->lock); + WRITE_ONCE(timer->flags, + (timer->flags & ~TIMER_BASEMASK) | cpu); + } + + debug_activate(timer, timer->expires); + internal_add_timer(base, timer); +- spin_unlock_irqrestore(&base->lock, flags); ++ raw_spin_unlock_irqrestore(&base->lock, flags); + } + EXPORT_SYMBOL_GPL(add_timer_on); + ++#ifdef CONFIG_PREEMPT_RT_FULL ++/* ++ * Wait for a running timer ++ */ ++static void wait_for_running_timer(struct timer_list *timer) ++{ ++ struct timer_base *base; ++ u32 tf = timer->flags; ++ ++ if (tf & TIMER_MIGRATING) ++ return; ++ ++ base = get_timer_base(tf); ++ swait_event(base->wait_for_running_timer, ++ base->running_timer != timer); ++} ++ ++# define wakeup_timer_waiters(b) swake_up_all(&(b)->wait_for_running_timer) ++#else ++static inline void wait_for_running_timer(struct timer_list *timer) ++{ ++ cpu_relax(); ++} ++ ++# define wakeup_timer_waiters(b) do { } while (0) ++#endif ++ + /** + * del_timer - deactive a timer. + * @timer: the timer to be deactivated +@@ -1170,7 +1200,7 @@ int del_timer(struct timer_list *timer) + if (timer_pending(timer)) { + base = lock_timer_base(timer, &flags); + ret = detach_if_pending(timer, base, true); +- spin_unlock_irqrestore(&base->lock, flags); ++ raw_spin_unlock_irqrestore(&base->lock, flags); + } + + return ret; +@@ -1198,13 +1228,13 @@ int try_to_del_timer_sync(struct timer_list *timer) + timer_stats_timer_clear_start_info(timer); + ret = detach_if_pending(timer, base, true); + } +- spin_unlock_irqrestore(&base->lock, flags); ++ raw_spin_unlock_irqrestore(&base->lock, flags); + + return ret; + } + EXPORT_SYMBOL(try_to_del_timer_sync); + +-#ifdef CONFIG_SMP ++#if defined(CONFIG_SMP) || defined(CONFIG_PREEMPT_RT_FULL) + /** + * del_timer_sync - deactivate a timer and wait for the handler to finish. + * @timer: the timer to be deactivated +@@ -1264,7 +1294,7 @@ int del_timer_sync(struct timer_list *timer) + int ret = try_to_del_timer_sync(timer); + if (ret >= 0) + return ret; +- cpu_relax(); ++ wait_for_running_timer(timer); + } + } + EXPORT_SYMBOL(del_timer_sync); +@@ -1329,14 +1359,17 @@ static void expire_timers(struct timer_base *base, struct hlist_head *head) + fn = timer->function; + data = timer->data; + +- if (timer->flags & TIMER_IRQSAFE) { +- spin_unlock(&base->lock); ++ if (!IS_ENABLED(CONFIG_PREEMPT_RT_FULL) && ++ timer->flags & TIMER_IRQSAFE) { ++ raw_spin_unlock(&base->lock); + call_timer_fn(timer, fn, data); +- spin_lock(&base->lock); ++ base->running_timer = NULL; ++ raw_spin_lock(&base->lock); + } else { +- spin_unlock_irq(&base->lock); ++ raw_spin_unlock_irq(&base->lock); + call_timer_fn(timer, fn, data); +- spin_lock_irq(&base->lock); ++ base->running_timer = NULL; ++ raw_spin_lock_irq(&base->lock); + } + } + } +@@ -1505,7 +1538,7 @@ u64 get_next_timer_interrupt(unsigned long basej, u64 basem) + if (cpu_is_offline(smp_processor_id())) + return expires; + +- spin_lock(&base->lock); ++ raw_spin_lock(&base->lock); + nextevt = __next_timer_interrupt(base); + is_max_delta = (nextevt == base->clk + NEXT_TIMER_MAX_DELTA); + base->next_expiry = nextevt; +@@ -1529,7 +1562,7 @@ u64 get_next_timer_interrupt(unsigned long basej, u64 basem) + if ((expires - basem) > TICK_NSEC) + base->is_idle = true; + } +- spin_unlock(&base->lock); ++ raw_spin_unlock(&base->lock); + + return cmp_next_hrtimer_event(basem, expires); + } +@@ -1594,13 +1627,13 @@ void update_process_times(int user_tick) + + /* Note: this timer irq context must be accounted for as well. */ + account_process_tick(p, user_tick); ++ scheduler_tick(); + run_local_timers(); + rcu_check_callbacks(user_tick); +-#ifdef CONFIG_IRQ_WORK ++#if defined(CONFIG_IRQ_WORK) + if (in_irq()) + irq_work_tick(); + #endif +- scheduler_tick(); + run_posix_cpu_timers(p); + } + +@@ -1616,7 +1649,7 @@ static inline void __run_timers(struct timer_base *base) + if (!time_after_eq(jiffies, base->clk)) + return; + +- spin_lock_irq(&base->lock); ++ raw_spin_lock_irq(&base->lock); + + while (time_after_eq(jiffies, base->clk)) { + +@@ -1626,8 +1659,8 @@ static inline void __run_timers(struct timer_base *base) + while (levels--) + expire_timers(base, heads + levels); + } +- base->running_timer = NULL; +- spin_unlock_irq(&base->lock); ++ raw_spin_unlock_irq(&base->lock); ++ wakeup_timer_waiters(base); + } + + /* +@@ -1637,6 +1670,8 @@ static void run_timer_softirq(struct softirq_action *h) + { + struct timer_base *base = this_cpu_ptr(&timer_bases[BASE_STD]); + ++ irq_work_tick_soft(); ++ + __run_timers(base); + if (IS_ENABLED(CONFIG_NO_HZ_COMMON) && base->nohz_active) + __run_timers(this_cpu_ptr(&timer_bases[BASE_DEF])); +@@ -1822,16 +1857,16 @@ int timers_dead_cpu(unsigned int cpu) + * The caller is globally serialized and nobody else + * takes two locks at once, deadlock is not possible. + */ +- spin_lock_irq(&new_base->lock); +- spin_lock_nested(&old_base->lock, SINGLE_DEPTH_NESTING); ++ raw_spin_lock_irq(&new_base->lock); ++ raw_spin_lock_nested(&old_base->lock, SINGLE_DEPTH_NESTING); + + BUG_ON(old_base->running_timer); + + for (i = 0; i < WHEEL_SIZE; i++) + migrate_timer_list(new_base, old_base->vectors + i); + +- spin_unlock(&old_base->lock); +- spin_unlock_irq(&new_base->lock); ++ raw_spin_unlock(&old_base->lock); ++ raw_spin_unlock_irq(&new_base->lock); + put_cpu_ptr(&timer_bases); + } + return 0; +@@ -1847,8 +1882,11 @@ static void __init init_timer_cpu(int cpu) + for (i = 0; i < NR_BASES; i++) { + base = per_cpu_ptr(&timer_bases[i], cpu); + base->cpu = cpu; +- spin_lock_init(&base->lock); ++ raw_spin_lock_init(&base->lock); + base->clk = jiffies; ++#ifdef CONFIG_PREEMPT_RT_FULL ++ init_swait_queue_head(&base->wait_for_running_timer); ++#endif + } + } + +diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig +index f4b86e8ca1e7..340f14eef24a 100644 +--- a/kernel/trace/Kconfig ++++ b/kernel/trace/Kconfig +@@ -187,6 +187,24 @@ config IRQSOFF_TRACER + enabled. This option and the preempt-off timing option can be + used together or separately.) + ++config INTERRUPT_OFF_HIST ++ bool "Interrupts-off Latency Histogram" ++ depends on IRQSOFF_TRACER ++ help ++ This option generates continuously updated histograms (one per cpu) ++ of the duration of time periods with interrupts disabled. The ++ histograms are disabled by default. To enable them, write a non-zero ++ number to ++ ++ /sys/kernel/debug/tracing/latency_hist/enable/preemptirqsoff ++ ++ If PREEMPT_OFF_HIST is also selected, additional histograms (one ++ per cpu) are generated that accumulate the duration of time periods ++ when both interrupts and preemption are disabled. The histogram data ++ will be located in the debug file system at ++ ++ /sys/kernel/debug/tracing/latency_hist/irqsoff ++ + config PREEMPT_TRACER + bool "Preemption-off Latency Tracer" + default n +@@ -197,6 +215,7 @@ config PREEMPT_TRACER + select RING_BUFFER_ALLOW_SWAP + select TRACER_SNAPSHOT + select TRACER_SNAPSHOT_PER_CPU_SWAP ++ select USING_GET_LOCK_PARENT_IP + help + This option measures the time spent in preemption-off critical + sections, with microsecond accuracy. +@@ -211,6 +230,24 @@ config PREEMPT_TRACER + enabled. This option and the irqs-off timing option can be + used together or separately.) + ++config PREEMPT_OFF_HIST ++ bool "Preemption-off Latency Histogram" ++ depends on PREEMPT_TRACER ++ help ++ This option generates continuously updated histograms (one per cpu) ++ of the duration of time periods with preemption disabled. The ++ histograms are disabled by default. To enable them, write a non-zero ++ number to ++ ++ /sys/kernel/debug/tracing/latency_hist/enable/preemptirqsoff ++ ++ If INTERRUPT_OFF_HIST is also selected, additional histograms (one ++ per cpu) are generated that accumulate the duration of time periods ++ when both interrupts and preemption are disabled. The histogram data ++ will be located in the debug file system at ++ ++ /sys/kernel/debug/tracing/latency_hist/preemptoff ++ + config SCHED_TRACER + bool "Scheduling Latency Tracer" + select GENERIC_TRACER +@@ -221,6 +258,74 @@ config SCHED_TRACER + This tracer tracks the latency of the highest priority task + to be scheduled in, starting from the point it has woken up. + ++config WAKEUP_LATENCY_HIST ++ bool "Scheduling Latency Histogram" ++ depends on SCHED_TRACER ++ help ++ This option generates continuously updated histograms (one per cpu) ++ of the scheduling latency of the highest priority task. ++ The histograms are disabled by default. To enable them, write a ++ non-zero number to ++ ++ /sys/kernel/debug/tracing/latency_hist/enable/wakeup ++ ++ Two different algorithms are used, one to determine the latency of ++ processes that exclusively use the highest priority of the system and ++ another one to determine the latency of processes that share the ++ highest system priority with other processes. The former is used to ++ improve hardware and system software, the latter to optimize the ++ priority design of a given system. The histogram data will be ++ located in the debug file system at ++ ++ /sys/kernel/debug/tracing/latency_hist/wakeup ++ ++ and ++ ++ /sys/kernel/debug/tracing/latency_hist/wakeup/sharedprio ++ ++ If both Scheduling Latency Histogram and Missed Timer Offsets ++ Histogram are selected, additional histogram data will be collected ++ that contain, in addition to the wakeup latency, the timer latency, in ++ case the wakeup was triggered by an expired timer. These histograms ++ are available in the ++ ++ /sys/kernel/debug/tracing/latency_hist/timerandwakeup ++ ++ directory. They reflect the apparent interrupt and scheduling latency ++ and are best suitable to determine the worst-case latency of a given ++ system. To enable these histograms, write a non-zero number to ++ ++ /sys/kernel/debug/tracing/latency_hist/enable/timerandwakeup ++ ++config MISSED_TIMER_OFFSETS_HIST ++ depends on HIGH_RES_TIMERS ++ select GENERIC_TRACER ++ bool "Missed Timer Offsets Histogram" ++ help ++ Generate a histogram of missed timer offsets in microseconds. The ++ histograms are disabled by default. To enable them, write a non-zero ++ number to ++ ++ /sys/kernel/debug/tracing/latency_hist/enable/missed_timer_offsets ++ ++ The histogram data will be located in the debug file system at ++ ++ /sys/kernel/debug/tracing/latency_hist/missed_timer_offsets ++ ++ If both Scheduling Latency Histogram and Missed Timer Offsets ++ Histogram are selected, additional histogram data will be collected ++ that contain, in addition to the wakeup latency, the timer latency, in ++ case the wakeup was triggered by an expired timer. These histograms ++ are available in the ++ ++ /sys/kernel/debug/tracing/latency_hist/timerandwakeup ++ ++ directory. They reflect the apparent interrupt and scheduling latency ++ and are best suitable to determine the worst-case latency of a given ++ system. To enable these histograms, write a non-zero number to ++ ++ /sys/kernel/debug/tracing/latency_hist/enable/timerandwakeup ++ + config ENABLE_DEFAULT_TRACERS + bool "Trace process context switches and events" + depends on !GENERIC_TRACER +diff --git a/kernel/trace/Makefile b/kernel/trace/Makefile +index d0a1617b52b4..6bf9e9ff1fa5 100644 +--- a/kernel/trace/Makefile ++++ b/kernel/trace/Makefile +@@ -41,6 +41,10 @@ obj-$(CONFIG_FUNCTION_TRACER) += trace_functions.o + obj-$(CONFIG_IRQSOFF_TRACER) += trace_irqsoff.o + obj-$(CONFIG_PREEMPT_TRACER) += trace_irqsoff.o + obj-$(CONFIG_SCHED_TRACER) += trace_sched_wakeup.o ++obj-$(CONFIG_INTERRUPT_OFF_HIST) += latency_hist.o ++obj-$(CONFIG_PREEMPT_OFF_HIST) += latency_hist.o ++obj-$(CONFIG_WAKEUP_LATENCY_HIST) += latency_hist.o ++obj-$(CONFIG_MISSED_TIMER_OFFSETS_HIST) += latency_hist.o + obj-$(CONFIG_NOP_TRACER) += trace_nop.o + obj-$(CONFIG_STACK_TRACER) += trace_stack.o + obj-$(CONFIG_MMIOTRACE) += trace_mmiotrace.o +diff --git a/kernel/trace/latency_hist.c b/kernel/trace/latency_hist.c +new file mode 100644 +index 000000000000..7f6ee70dea41 +--- /dev/null ++++ b/kernel/trace/latency_hist.c +@@ -0,0 +1,1178 @@ ++/* ++ * kernel/trace/latency_hist.c ++ * ++ * Add support for histograms of preemption-off latency and ++ * interrupt-off latency and wakeup latency, it depends on ++ * Real-Time Preemption Support. ++ * ++ * Copyright (C) 2005 MontaVista Software, Inc. ++ * Yi Yang <yyang@ch.mvista.com> ++ * ++ * Converted to work with the new latency tracer. ++ * Copyright (C) 2008 Red Hat, Inc. ++ * Steven Rostedt <srostedt@redhat.com> ++ * ++ */ ++#include <linux/module.h> ++#include <linux/debugfs.h> ++#include <linux/seq_file.h> ++#include <linux/percpu.h> ++#include <linux/kallsyms.h> ++#include <linux/uaccess.h> ++#include <linux/sched.h> ++#include <linux/sched/rt.h> ++#include <linux/slab.h> ++#include <linux/atomic.h> ++#include <asm/div64.h> ++ ++#include "trace.h" ++#include <trace/events/sched.h> ++ ++#define NSECS_PER_USECS 1000L ++ ++#define CREATE_TRACE_POINTS ++#include <trace/events/hist.h> ++ ++enum { ++ IRQSOFF_LATENCY = 0, ++ PREEMPTOFF_LATENCY, ++ PREEMPTIRQSOFF_LATENCY, ++ WAKEUP_LATENCY, ++ WAKEUP_LATENCY_SHAREDPRIO, ++ MISSED_TIMER_OFFSETS, ++ TIMERANDWAKEUP_LATENCY, ++ MAX_LATENCY_TYPE, ++}; ++ ++#define MAX_ENTRY_NUM 10240 ++ ++struct hist_data { ++ atomic_t hist_mode; /* 0 log, 1 don't log */ ++ long offset; /* set it to MAX_ENTRY_NUM/2 for a bipolar scale */ ++ long min_lat; ++ long max_lat; ++ unsigned long long below_hist_bound_samples; ++ unsigned long long above_hist_bound_samples; ++ long long accumulate_lat; ++ unsigned long long total_samples; ++ unsigned long long hist_array[MAX_ENTRY_NUM]; ++}; ++ ++struct enable_data { ++ int latency_type; ++ int enabled; ++}; ++ ++static char *latency_hist_dir_root = "latency_hist"; ++ ++#ifdef CONFIG_INTERRUPT_OFF_HIST ++static DEFINE_PER_CPU(struct hist_data, irqsoff_hist); ++static char *irqsoff_hist_dir = "irqsoff"; ++static DEFINE_PER_CPU(cycles_t, hist_irqsoff_start); ++static DEFINE_PER_CPU(int, hist_irqsoff_counting); ++#endif ++ ++#ifdef CONFIG_PREEMPT_OFF_HIST ++static DEFINE_PER_CPU(struct hist_data, preemptoff_hist); ++static char *preemptoff_hist_dir = "preemptoff"; ++static DEFINE_PER_CPU(cycles_t, hist_preemptoff_start); ++static DEFINE_PER_CPU(int, hist_preemptoff_counting); ++#endif ++ ++#if defined(CONFIG_PREEMPT_OFF_HIST) && defined(CONFIG_INTERRUPT_OFF_HIST) ++static DEFINE_PER_CPU(struct hist_data, preemptirqsoff_hist); ++static char *preemptirqsoff_hist_dir = "preemptirqsoff"; ++static DEFINE_PER_CPU(cycles_t, hist_preemptirqsoff_start); ++static DEFINE_PER_CPU(int, hist_preemptirqsoff_counting); ++#endif ++ ++#if defined(CONFIG_PREEMPT_OFF_HIST) || defined(CONFIG_INTERRUPT_OFF_HIST) ++static notrace void probe_preemptirqsoff_hist(void *v, int reason, int start); ++static struct enable_data preemptirqsoff_enabled_data = { ++ .latency_type = PREEMPTIRQSOFF_LATENCY, ++ .enabled = 0, ++}; ++#endif ++ ++#if defined(CONFIG_WAKEUP_LATENCY_HIST) || \ ++ defined(CONFIG_MISSED_TIMER_OFFSETS_HIST) ++struct maxlatproc_data { ++ char comm[FIELD_SIZEOF(struct task_struct, comm)]; ++ char current_comm[FIELD_SIZEOF(struct task_struct, comm)]; ++ int pid; ++ int current_pid; ++ int prio; ++ int current_prio; ++ long latency; ++ long timeroffset; ++ cycle_t timestamp; ++}; ++#endif ++ ++#ifdef CONFIG_WAKEUP_LATENCY_HIST ++static DEFINE_PER_CPU(struct hist_data, wakeup_latency_hist); ++static DEFINE_PER_CPU(struct hist_data, wakeup_latency_hist_sharedprio); ++static char *wakeup_latency_hist_dir = "wakeup"; ++static char *wakeup_latency_hist_dir_sharedprio = "sharedprio"; ++static notrace void probe_wakeup_latency_hist_start(void *v, ++ struct task_struct *p); ++static notrace void probe_wakeup_latency_hist_stop(void *v, ++ bool preempt, struct task_struct *prev, struct task_struct *next); ++static notrace void probe_sched_migrate_task(void *, ++ struct task_struct *task, int cpu); ++static struct enable_data wakeup_latency_enabled_data = { ++ .latency_type = WAKEUP_LATENCY, ++ .enabled = 0, ++}; ++static DEFINE_PER_CPU(struct maxlatproc_data, wakeup_maxlatproc); ++static DEFINE_PER_CPU(struct maxlatproc_data, wakeup_maxlatproc_sharedprio); ++static DEFINE_PER_CPU(struct task_struct *, wakeup_task); ++static DEFINE_PER_CPU(int, wakeup_sharedprio); ++static unsigned long wakeup_pid; ++#endif ++ ++#ifdef CONFIG_MISSED_TIMER_OFFSETS_HIST ++static DEFINE_PER_CPU(struct hist_data, missed_timer_offsets); ++static char *missed_timer_offsets_dir = "missed_timer_offsets"; ++static notrace void probe_hrtimer_interrupt(void *v, int cpu, ++ long long offset, struct task_struct *curr, struct task_struct *task); ++static struct enable_data missed_timer_offsets_enabled_data = { ++ .latency_type = MISSED_TIMER_OFFSETS, ++ .enabled = 0, ++}; ++static DEFINE_PER_CPU(struct maxlatproc_data, missed_timer_offsets_maxlatproc); ++static unsigned long missed_timer_offsets_pid; ++#endif ++ ++#if defined(CONFIG_WAKEUP_LATENCY_HIST) && \ ++ defined(CONFIG_MISSED_TIMER_OFFSETS_HIST) ++static DEFINE_PER_CPU(struct hist_data, timerandwakeup_latency_hist); ++static char *timerandwakeup_latency_hist_dir = "timerandwakeup"; ++static struct enable_data timerandwakeup_enabled_data = { ++ .latency_type = TIMERANDWAKEUP_LATENCY, ++ .enabled = 0, ++}; ++static DEFINE_PER_CPU(struct maxlatproc_data, timerandwakeup_maxlatproc); ++#endif ++ ++void notrace latency_hist(int latency_type, int cpu, long latency, ++ long timeroffset, cycle_t stop, ++ struct task_struct *p) ++{ ++ struct hist_data *my_hist; ++#if defined(CONFIG_WAKEUP_LATENCY_HIST) || \ ++ defined(CONFIG_MISSED_TIMER_OFFSETS_HIST) ++ struct maxlatproc_data *mp = NULL; ++#endif ++ ++ if (!cpu_possible(cpu) || latency_type < 0 || ++ latency_type >= MAX_LATENCY_TYPE) ++ return; ++ ++ switch (latency_type) { ++#ifdef CONFIG_INTERRUPT_OFF_HIST ++ case IRQSOFF_LATENCY: ++ my_hist = &per_cpu(irqsoff_hist, cpu); ++ break; ++#endif ++#ifdef CONFIG_PREEMPT_OFF_HIST ++ case PREEMPTOFF_LATENCY: ++ my_hist = &per_cpu(preemptoff_hist, cpu); ++ break; ++#endif ++#if defined(CONFIG_PREEMPT_OFF_HIST) && defined(CONFIG_INTERRUPT_OFF_HIST) ++ case PREEMPTIRQSOFF_LATENCY: ++ my_hist = &per_cpu(preemptirqsoff_hist, cpu); ++ break; ++#endif ++#ifdef CONFIG_WAKEUP_LATENCY_HIST ++ case WAKEUP_LATENCY: ++ my_hist = &per_cpu(wakeup_latency_hist, cpu); ++ mp = &per_cpu(wakeup_maxlatproc, cpu); ++ break; ++ case WAKEUP_LATENCY_SHAREDPRIO: ++ my_hist = &per_cpu(wakeup_latency_hist_sharedprio, cpu); ++ mp = &per_cpu(wakeup_maxlatproc_sharedprio, cpu); ++ break; ++#endif ++#ifdef CONFIG_MISSED_TIMER_OFFSETS_HIST ++ case MISSED_TIMER_OFFSETS: ++ my_hist = &per_cpu(missed_timer_offsets, cpu); ++ mp = &per_cpu(missed_timer_offsets_maxlatproc, cpu); ++ break; ++#endif ++#if defined(CONFIG_WAKEUP_LATENCY_HIST) && \ ++ defined(CONFIG_MISSED_TIMER_OFFSETS_HIST) ++ case TIMERANDWAKEUP_LATENCY: ++ my_hist = &per_cpu(timerandwakeup_latency_hist, cpu); ++ mp = &per_cpu(timerandwakeup_maxlatproc, cpu); ++ break; ++#endif ++ ++ default: ++ return; ++ } ++ ++ latency += my_hist->offset; ++ ++ if (atomic_read(&my_hist->hist_mode) == 0) ++ return; ++ ++ if (latency < 0 || latency >= MAX_ENTRY_NUM) { ++ if (latency < 0) ++ my_hist->below_hist_bound_samples++; ++ else ++ my_hist->above_hist_bound_samples++; ++ } else ++ my_hist->hist_array[latency]++; ++ ++ if (unlikely(latency > my_hist->max_lat || ++ my_hist->min_lat == LONG_MAX)) { ++#if defined(CONFIG_WAKEUP_LATENCY_HIST) || \ ++ defined(CONFIG_MISSED_TIMER_OFFSETS_HIST) ++ if (latency_type == WAKEUP_LATENCY || ++ latency_type == WAKEUP_LATENCY_SHAREDPRIO || ++ latency_type == MISSED_TIMER_OFFSETS || ++ latency_type == TIMERANDWAKEUP_LATENCY) { ++ strncpy(mp->comm, p->comm, sizeof(mp->comm)); ++ strncpy(mp->current_comm, current->comm, ++ sizeof(mp->current_comm)); ++ mp->pid = task_pid_nr(p); ++ mp->current_pid = task_pid_nr(current); ++ mp->prio = p->prio; ++ mp->current_prio = current->prio; ++ mp->latency = latency; ++ mp->timeroffset = timeroffset; ++ mp->timestamp = stop; ++ } ++#endif ++ my_hist->max_lat = latency; ++ } ++ if (unlikely(latency < my_hist->min_lat)) ++ my_hist->min_lat = latency; ++ my_hist->total_samples++; ++ my_hist->accumulate_lat += latency; ++} ++ ++static void *l_start(struct seq_file *m, loff_t *pos) ++{ ++ loff_t *index_ptr = NULL; ++ loff_t index = *pos; ++ struct hist_data *my_hist = m->private; ++ ++ if (index == 0) { ++ char minstr[32], avgstr[32], maxstr[32]; ++ ++ atomic_dec(&my_hist->hist_mode); ++ ++ if (likely(my_hist->total_samples)) { ++ long avg = (long) div64_s64(my_hist->accumulate_lat, ++ my_hist->total_samples); ++ snprintf(minstr, sizeof(minstr), "%ld", ++ my_hist->min_lat - my_hist->offset); ++ snprintf(avgstr, sizeof(avgstr), "%ld", ++ avg - my_hist->offset); ++ snprintf(maxstr, sizeof(maxstr), "%ld", ++ my_hist->max_lat - my_hist->offset); ++ } else { ++ strcpy(minstr, "<undef>"); ++ strcpy(avgstr, minstr); ++ strcpy(maxstr, minstr); ++ } ++ ++ seq_printf(m, "#Minimum latency: %s microseconds\n" ++ "#Average latency: %s microseconds\n" ++ "#Maximum latency: %s microseconds\n" ++ "#Total samples: %llu\n" ++ "#There are %llu samples lower than %ld" ++ " microseconds.\n" ++ "#There are %llu samples greater or equal" ++ " than %ld microseconds.\n" ++ "#usecs\t%16s\n", ++ minstr, avgstr, maxstr, ++ my_hist->total_samples, ++ my_hist->below_hist_bound_samples, ++ -my_hist->offset, ++ my_hist->above_hist_bound_samples, ++ MAX_ENTRY_NUM - my_hist->offset, ++ "samples"); ++ } ++ if (index < MAX_ENTRY_NUM) { ++ index_ptr = kmalloc(sizeof(loff_t), GFP_KERNEL); ++ if (index_ptr) ++ *index_ptr = index; ++ } ++ ++ return index_ptr; ++} ++ ++static void *l_next(struct seq_file *m, void *p, loff_t *pos) ++{ ++ loff_t *index_ptr = p; ++ struct hist_data *my_hist = m->private; ++ ++ if (++*pos >= MAX_ENTRY_NUM) { ++ atomic_inc(&my_hist->hist_mode); ++ return NULL; ++ } ++ *index_ptr = *pos; ++ return index_ptr; ++} ++ ++static void l_stop(struct seq_file *m, void *p) ++{ ++ kfree(p); ++} ++ ++static int l_show(struct seq_file *m, void *p) ++{ ++ int index = *(loff_t *) p; ++ struct hist_data *my_hist = m->private; ++ ++ seq_printf(m, "%6ld\t%16llu\n", index - my_hist->offset, ++ my_hist->hist_array[index]); ++ return 0; ++} ++ ++static const struct seq_operations latency_hist_seq_op = { ++ .start = l_start, ++ .next = l_next, ++ .stop = l_stop, ++ .show = l_show ++}; ++ ++static int latency_hist_open(struct inode *inode, struct file *file) ++{ ++ int ret; ++ ++ ret = seq_open(file, &latency_hist_seq_op); ++ if (!ret) { ++ struct seq_file *seq = file->private_data; ++ seq->private = inode->i_private; ++ } ++ return ret; ++} ++ ++static const struct file_operations latency_hist_fops = { ++ .open = latency_hist_open, ++ .read = seq_read, ++ .llseek = seq_lseek, ++ .release = seq_release, ++}; ++ ++#if defined(CONFIG_WAKEUP_LATENCY_HIST) || \ ++ defined(CONFIG_MISSED_TIMER_OFFSETS_HIST) ++static void clear_maxlatprocdata(struct maxlatproc_data *mp) ++{ ++ mp->comm[0] = mp->current_comm[0] = '\0'; ++ mp->prio = mp->current_prio = mp->pid = mp->current_pid = ++ mp->latency = mp->timeroffset = -1; ++ mp->timestamp = 0; ++} ++#endif ++ ++static void hist_reset(struct hist_data *hist) ++{ ++ atomic_dec(&hist->hist_mode); ++ ++ memset(hist->hist_array, 0, sizeof(hist->hist_array)); ++ hist->below_hist_bound_samples = 0ULL; ++ hist->above_hist_bound_samples = 0ULL; ++ hist->min_lat = LONG_MAX; ++ hist->max_lat = LONG_MIN; ++ hist->total_samples = 0ULL; ++ hist->accumulate_lat = 0LL; ++ ++ atomic_inc(&hist->hist_mode); ++} ++ ++static ssize_t ++latency_hist_reset(struct file *file, const char __user *a, ++ size_t size, loff_t *off) ++{ ++ int cpu; ++ struct hist_data *hist = NULL; ++#if defined(CONFIG_WAKEUP_LATENCY_HIST) || \ ++ defined(CONFIG_MISSED_TIMER_OFFSETS_HIST) ++ struct maxlatproc_data *mp = NULL; ++#endif ++ off_t latency_type = (off_t) file->private_data; ++ ++ for_each_online_cpu(cpu) { ++ ++ switch (latency_type) { ++#ifdef CONFIG_PREEMPT_OFF_HIST ++ case PREEMPTOFF_LATENCY: ++ hist = &per_cpu(preemptoff_hist, cpu); ++ break; ++#endif ++#ifdef CONFIG_INTERRUPT_OFF_HIST ++ case IRQSOFF_LATENCY: ++ hist = &per_cpu(irqsoff_hist, cpu); ++ break; ++#endif ++#if defined(CONFIG_INTERRUPT_OFF_HIST) && defined(CONFIG_PREEMPT_OFF_HIST) ++ case PREEMPTIRQSOFF_LATENCY: ++ hist = &per_cpu(preemptirqsoff_hist, cpu); ++ break; ++#endif ++#ifdef CONFIG_WAKEUP_LATENCY_HIST ++ case WAKEUP_LATENCY: ++ hist = &per_cpu(wakeup_latency_hist, cpu); ++ mp = &per_cpu(wakeup_maxlatproc, cpu); ++ break; ++ case WAKEUP_LATENCY_SHAREDPRIO: ++ hist = &per_cpu(wakeup_latency_hist_sharedprio, cpu); ++ mp = &per_cpu(wakeup_maxlatproc_sharedprio, cpu); ++ break; ++#endif ++#ifdef CONFIG_MISSED_TIMER_OFFSETS_HIST ++ case MISSED_TIMER_OFFSETS: ++ hist = &per_cpu(missed_timer_offsets, cpu); ++ mp = &per_cpu(missed_timer_offsets_maxlatproc, cpu); ++ break; ++#endif ++#if defined(CONFIG_WAKEUP_LATENCY_HIST) && \ ++ defined(CONFIG_MISSED_TIMER_OFFSETS_HIST) ++ case TIMERANDWAKEUP_LATENCY: ++ hist = &per_cpu(timerandwakeup_latency_hist, cpu); ++ mp = &per_cpu(timerandwakeup_maxlatproc, cpu); ++ break; ++#endif ++ } ++ ++ hist_reset(hist); ++#if defined(CONFIG_WAKEUP_LATENCY_HIST) || \ ++ defined(CONFIG_MISSED_TIMER_OFFSETS_HIST) ++ if (latency_type == WAKEUP_LATENCY || ++ latency_type == WAKEUP_LATENCY_SHAREDPRIO || ++ latency_type == MISSED_TIMER_OFFSETS || ++ latency_type == TIMERANDWAKEUP_LATENCY) ++ clear_maxlatprocdata(mp); ++#endif ++ } ++ ++ return size; ++} ++ ++#if defined(CONFIG_WAKEUP_LATENCY_HIST) || \ ++ defined(CONFIG_MISSED_TIMER_OFFSETS_HIST) ++static ssize_t ++show_pid(struct file *file, char __user *ubuf, size_t cnt, loff_t *ppos) ++{ ++ char buf[64]; ++ int r; ++ unsigned long *this_pid = file->private_data; ++ ++ r = snprintf(buf, sizeof(buf), "%lu\n", *this_pid); ++ return simple_read_from_buffer(ubuf, cnt, ppos, buf, r); ++} ++ ++static ssize_t do_pid(struct file *file, const char __user *ubuf, ++ size_t cnt, loff_t *ppos) ++{ ++ char buf[64]; ++ unsigned long pid; ++ unsigned long *this_pid = file->private_data; ++ ++ if (cnt >= sizeof(buf)) ++ return -EINVAL; ++ ++ if (copy_from_user(&buf, ubuf, cnt)) ++ return -EFAULT; ++ ++ buf[cnt] = '\0'; ++ ++ if (kstrtoul(buf, 10, &pid)) ++ return -EINVAL; ++ ++ *this_pid = pid; ++ ++ return cnt; ++} ++#endif ++ ++#if defined(CONFIG_WAKEUP_LATENCY_HIST) || \ ++ defined(CONFIG_MISSED_TIMER_OFFSETS_HIST) ++static ssize_t ++show_maxlatproc(struct file *file, char __user *ubuf, size_t cnt, loff_t *ppos) ++{ ++ int r; ++ struct maxlatproc_data *mp = file->private_data; ++ int strmaxlen = (TASK_COMM_LEN * 2) + (8 * 8); ++ unsigned long long t; ++ unsigned long usecs, secs; ++ char *buf; ++ ++ if (mp->pid == -1 || mp->current_pid == -1) { ++ buf = "(none)\n"; ++ return simple_read_from_buffer(ubuf, cnt, ppos, buf, ++ strlen(buf)); ++ } ++ ++ buf = kmalloc(strmaxlen, GFP_KERNEL); ++ if (buf == NULL) ++ return -ENOMEM; ++ ++ t = ns2usecs(mp->timestamp); ++ usecs = do_div(t, USEC_PER_SEC); ++ secs = (unsigned long) t; ++ r = snprintf(buf, strmaxlen, ++ "%d %d %ld (%ld) %s <- %d %d %s %lu.%06lu\n", mp->pid, ++ MAX_RT_PRIO-1 - mp->prio, mp->latency, mp->timeroffset, mp->comm, ++ mp->current_pid, MAX_RT_PRIO-1 - mp->current_prio, mp->current_comm, ++ secs, usecs); ++ r = simple_read_from_buffer(ubuf, cnt, ppos, buf, r); ++ kfree(buf); ++ return r; ++} ++#endif ++ ++static ssize_t ++show_enable(struct file *file, char __user *ubuf, size_t cnt, loff_t *ppos) ++{ ++ char buf[64]; ++ struct enable_data *ed = file->private_data; ++ int r; ++ ++ r = snprintf(buf, sizeof(buf), "%d\n", ed->enabled); ++ return simple_read_from_buffer(ubuf, cnt, ppos, buf, r); ++} ++ ++static ssize_t ++do_enable(struct file *file, const char __user *ubuf, size_t cnt, loff_t *ppos) ++{ ++ char buf[64]; ++ long enable; ++ struct enable_data *ed = file->private_data; ++ ++ if (cnt >= sizeof(buf)) ++ return -EINVAL; ++ ++ if (copy_from_user(&buf, ubuf, cnt)) ++ return -EFAULT; ++ ++ buf[cnt] = 0; ++ ++ if (kstrtoul(buf, 10, &enable)) ++ return -EINVAL; ++ ++ if ((enable && ed->enabled) || (!enable && !ed->enabled)) ++ return cnt; ++ ++ if (enable) { ++ int ret; ++ ++ switch (ed->latency_type) { ++#if defined(CONFIG_INTERRUPT_OFF_HIST) || defined(CONFIG_PREEMPT_OFF_HIST) ++ case PREEMPTIRQSOFF_LATENCY: ++ ret = register_trace_preemptirqsoff_hist( ++ probe_preemptirqsoff_hist, NULL); ++ if (ret) { ++ pr_info("wakeup trace: Couldn't assign " ++ "probe_preemptirqsoff_hist " ++ "to trace_preemptirqsoff_hist\n"); ++ return ret; ++ } ++ break; ++#endif ++#ifdef CONFIG_WAKEUP_LATENCY_HIST ++ case WAKEUP_LATENCY: ++ ret = register_trace_sched_wakeup( ++ probe_wakeup_latency_hist_start, NULL); ++ if (ret) { ++ pr_info("wakeup trace: Couldn't assign " ++ "probe_wakeup_latency_hist_start " ++ "to trace_sched_wakeup\n"); ++ return ret; ++ } ++ ret = register_trace_sched_wakeup_new( ++ probe_wakeup_latency_hist_start, NULL); ++ if (ret) { ++ pr_info("wakeup trace: Couldn't assign " ++ "probe_wakeup_latency_hist_start " ++ "to trace_sched_wakeup_new\n"); ++ unregister_trace_sched_wakeup( ++ probe_wakeup_latency_hist_start, NULL); ++ return ret; ++ } ++ ret = register_trace_sched_switch( ++ probe_wakeup_latency_hist_stop, NULL); ++ if (ret) { ++ pr_info("wakeup trace: Couldn't assign " ++ "probe_wakeup_latency_hist_stop " ++ "to trace_sched_switch\n"); ++ unregister_trace_sched_wakeup( ++ probe_wakeup_latency_hist_start, NULL); ++ unregister_trace_sched_wakeup_new( ++ probe_wakeup_latency_hist_start, NULL); ++ return ret; ++ } ++ ret = register_trace_sched_migrate_task( ++ probe_sched_migrate_task, NULL); ++ if (ret) { ++ pr_info("wakeup trace: Couldn't assign " ++ "probe_sched_migrate_task " ++ "to trace_sched_migrate_task\n"); ++ unregister_trace_sched_wakeup( ++ probe_wakeup_latency_hist_start, NULL); ++ unregister_trace_sched_wakeup_new( ++ probe_wakeup_latency_hist_start, NULL); ++ unregister_trace_sched_switch( ++ probe_wakeup_latency_hist_stop, NULL); ++ return ret; ++ } ++ break; ++#endif ++#ifdef CONFIG_MISSED_TIMER_OFFSETS_HIST ++ case MISSED_TIMER_OFFSETS: ++ ret = register_trace_hrtimer_interrupt( ++ probe_hrtimer_interrupt, NULL); ++ if (ret) { ++ pr_info("wakeup trace: Couldn't assign " ++ "probe_hrtimer_interrupt " ++ "to trace_hrtimer_interrupt\n"); ++ return ret; ++ } ++ break; ++#endif ++#if defined(CONFIG_WAKEUP_LATENCY_HIST) && \ ++ defined(CONFIG_MISSED_TIMER_OFFSETS_HIST) ++ case TIMERANDWAKEUP_LATENCY: ++ if (!wakeup_latency_enabled_data.enabled || ++ !missed_timer_offsets_enabled_data.enabled) ++ return -EINVAL; ++ break; ++#endif ++ default: ++ break; ++ } ++ } else { ++ switch (ed->latency_type) { ++#if defined(CONFIG_INTERRUPT_OFF_HIST) || defined(CONFIG_PREEMPT_OFF_HIST) ++ case PREEMPTIRQSOFF_LATENCY: ++ { ++ int cpu; ++ ++ unregister_trace_preemptirqsoff_hist( ++ probe_preemptirqsoff_hist, NULL); ++ for_each_online_cpu(cpu) { ++#ifdef CONFIG_INTERRUPT_OFF_HIST ++ per_cpu(hist_irqsoff_counting, ++ cpu) = 0; ++#endif ++#ifdef CONFIG_PREEMPT_OFF_HIST ++ per_cpu(hist_preemptoff_counting, ++ cpu) = 0; ++#endif ++#if defined(CONFIG_INTERRUPT_OFF_HIST) && defined(CONFIG_PREEMPT_OFF_HIST) ++ per_cpu(hist_preemptirqsoff_counting, ++ cpu) = 0; ++#endif ++ } ++ } ++ break; ++#endif ++#ifdef CONFIG_WAKEUP_LATENCY_HIST ++ case WAKEUP_LATENCY: ++ { ++ int cpu; ++ ++ unregister_trace_sched_wakeup( ++ probe_wakeup_latency_hist_start, NULL); ++ unregister_trace_sched_wakeup_new( ++ probe_wakeup_latency_hist_start, NULL); ++ unregister_trace_sched_switch( ++ probe_wakeup_latency_hist_stop, NULL); ++ unregister_trace_sched_migrate_task( ++ probe_sched_migrate_task, NULL); ++ ++ for_each_online_cpu(cpu) { ++ per_cpu(wakeup_task, cpu) = NULL; ++ per_cpu(wakeup_sharedprio, cpu) = 0; ++ } ++ } ++#ifdef CONFIG_MISSED_TIMER_OFFSETS_HIST ++ timerandwakeup_enabled_data.enabled = 0; ++#endif ++ break; ++#endif ++#ifdef CONFIG_MISSED_TIMER_OFFSETS_HIST ++ case MISSED_TIMER_OFFSETS: ++ unregister_trace_hrtimer_interrupt( ++ probe_hrtimer_interrupt, NULL); ++#ifdef CONFIG_WAKEUP_LATENCY_HIST ++ timerandwakeup_enabled_data.enabled = 0; ++#endif ++ break; ++#endif ++ default: ++ break; ++ } ++ } ++ ed->enabled = enable; ++ return cnt; ++} ++ ++static const struct file_operations latency_hist_reset_fops = { ++ .open = tracing_open_generic, ++ .write = latency_hist_reset, ++}; ++ ++static const struct file_operations enable_fops = { ++ .open = tracing_open_generic, ++ .read = show_enable, ++ .write = do_enable, ++}; ++ ++#if defined(CONFIG_WAKEUP_LATENCY_HIST) || \ ++ defined(CONFIG_MISSED_TIMER_OFFSETS_HIST) ++static const struct file_operations pid_fops = { ++ .open = tracing_open_generic, ++ .read = show_pid, ++ .write = do_pid, ++}; ++ ++static const struct file_operations maxlatproc_fops = { ++ .open = tracing_open_generic, ++ .read = show_maxlatproc, ++}; ++#endif ++ ++#if defined(CONFIG_INTERRUPT_OFF_HIST) || defined(CONFIG_PREEMPT_OFF_HIST) ++static notrace void probe_preemptirqsoff_hist(void *v, int reason, ++ int starthist) ++{ ++ int cpu = raw_smp_processor_id(); ++ int time_set = 0; ++ ++ if (starthist) { ++ cycle_t uninitialized_var(start); ++ ++ if (!preempt_count() && !irqs_disabled()) ++ return; ++ ++#ifdef CONFIG_INTERRUPT_OFF_HIST ++ if ((reason == IRQS_OFF || reason == TRACE_START) && ++ !per_cpu(hist_irqsoff_counting, cpu)) { ++ per_cpu(hist_irqsoff_counting, cpu) = 1; ++ start = ftrace_now(cpu); ++ time_set++; ++ per_cpu(hist_irqsoff_start, cpu) = start; ++ } ++#endif ++ ++#ifdef CONFIG_PREEMPT_OFF_HIST ++ if ((reason == PREEMPT_OFF || reason == TRACE_START) && ++ !per_cpu(hist_preemptoff_counting, cpu)) { ++ per_cpu(hist_preemptoff_counting, cpu) = 1; ++ if (!(time_set++)) ++ start = ftrace_now(cpu); ++ per_cpu(hist_preemptoff_start, cpu) = start; ++ } ++#endif ++ ++#if defined(CONFIG_INTERRUPT_OFF_HIST) && defined(CONFIG_PREEMPT_OFF_HIST) ++ if (per_cpu(hist_irqsoff_counting, cpu) && ++ per_cpu(hist_preemptoff_counting, cpu) && ++ !per_cpu(hist_preemptirqsoff_counting, cpu)) { ++ per_cpu(hist_preemptirqsoff_counting, cpu) = 1; ++ if (!time_set) ++ start = ftrace_now(cpu); ++ per_cpu(hist_preemptirqsoff_start, cpu) = start; ++ } ++#endif ++ } else { ++ cycle_t uninitialized_var(stop); ++ ++#ifdef CONFIG_INTERRUPT_OFF_HIST ++ if ((reason == IRQS_ON || reason == TRACE_STOP) && ++ per_cpu(hist_irqsoff_counting, cpu)) { ++ cycle_t start = per_cpu(hist_irqsoff_start, cpu); ++ ++ stop = ftrace_now(cpu); ++ time_set++; ++ if (start) { ++ long latency = ((long) (stop - start)) / ++ NSECS_PER_USECS; ++ ++ latency_hist(IRQSOFF_LATENCY, cpu, latency, 0, ++ stop, NULL); ++ } ++ per_cpu(hist_irqsoff_counting, cpu) = 0; ++ } ++#endif ++ ++#ifdef CONFIG_PREEMPT_OFF_HIST ++ if ((reason == PREEMPT_ON || reason == TRACE_STOP) && ++ per_cpu(hist_preemptoff_counting, cpu)) { ++ cycle_t start = per_cpu(hist_preemptoff_start, cpu); ++ ++ if (!(time_set++)) ++ stop = ftrace_now(cpu); ++ if (start) { ++ long latency = ((long) (stop - start)) / ++ NSECS_PER_USECS; ++ ++ latency_hist(PREEMPTOFF_LATENCY, cpu, latency, ++ 0, stop, NULL); ++ } ++ per_cpu(hist_preemptoff_counting, cpu) = 0; ++ } ++#endif ++ ++#if defined(CONFIG_INTERRUPT_OFF_HIST) && defined(CONFIG_PREEMPT_OFF_HIST) ++ if ((!per_cpu(hist_irqsoff_counting, cpu) || ++ !per_cpu(hist_preemptoff_counting, cpu)) && ++ per_cpu(hist_preemptirqsoff_counting, cpu)) { ++ cycle_t start = per_cpu(hist_preemptirqsoff_start, cpu); ++ ++ if (!time_set) ++ stop = ftrace_now(cpu); ++ if (start) { ++ long latency = ((long) (stop - start)) / ++ NSECS_PER_USECS; ++ ++ latency_hist(PREEMPTIRQSOFF_LATENCY, cpu, ++ latency, 0, stop, NULL); ++ } ++ per_cpu(hist_preemptirqsoff_counting, cpu) = 0; ++ } ++#endif ++ } ++} ++#endif ++ ++#ifdef CONFIG_WAKEUP_LATENCY_HIST ++static DEFINE_RAW_SPINLOCK(wakeup_lock); ++static notrace void probe_sched_migrate_task(void *v, struct task_struct *task, ++ int cpu) ++{ ++ int old_cpu = task_cpu(task); ++ ++ if (cpu != old_cpu) { ++ unsigned long flags; ++ struct task_struct *cpu_wakeup_task; ++ ++ raw_spin_lock_irqsave(&wakeup_lock, flags); ++ ++ cpu_wakeup_task = per_cpu(wakeup_task, old_cpu); ++ if (task == cpu_wakeup_task) { ++ put_task_struct(cpu_wakeup_task); ++ per_cpu(wakeup_task, old_cpu) = NULL; ++ cpu_wakeup_task = per_cpu(wakeup_task, cpu) = task; ++ get_task_struct(cpu_wakeup_task); ++ } ++ ++ raw_spin_unlock_irqrestore(&wakeup_lock, flags); ++ } ++} ++ ++static notrace void probe_wakeup_latency_hist_start(void *v, ++ struct task_struct *p) ++{ ++ unsigned long flags; ++ struct task_struct *curr = current; ++ int cpu = task_cpu(p); ++ struct task_struct *cpu_wakeup_task; ++ ++ raw_spin_lock_irqsave(&wakeup_lock, flags); ++ ++ cpu_wakeup_task = per_cpu(wakeup_task, cpu); ++ ++ if (wakeup_pid) { ++ if ((cpu_wakeup_task && p->prio == cpu_wakeup_task->prio) || ++ p->prio == curr->prio) ++ per_cpu(wakeup_sharedprio, cpu) = 1; ++ if (likely(wakeup_pid != task_pid_nr(p))) ++ goto out; ++ } else { ++ if (likely(!rt_task(p)) || ++ (cpu_wakeup_task && p->prio > cpu_wakeup_task->prio) || ++ p->prio > curr->prio) ++ goto out; ++ if ((cpu_wakeup_task && p->prio == cpu_wakeup_task->prio) || ++ p->prio == curr->prio) ++ per_cpu(wakeup_sharedprio, cpu) = 1; ++ } ++ ++ if (cpu_wakeup_task) ++ put_task_struct(cpu_wakeup_task); ++ cpu_wakeup_task = per_cpu(wakeup_task, cpu) = p; ++ get_task_struct(cpu_wakeup_task); ++ cpu_wakeup_task->preempt_timestamp_hist = ++ ftrace_now(raw_smp_processor_id()); ++out: ++ raw_spin_unlock_irqrestore(&wakeup_lock, flags); ++} ++ ++static notrace void probe_wakeup_latency_hist_stop(void *v, ++ bool preempt, struct task_struct *prev, struct task_struct *next) ++{ ++ unsigned long flags; ++ int cpu = task_cpu(next); ++ long latency; ++ cycle_t stop; ++ struct task_struct *cpu_wakeup_task; ++ ++ raw_spin_lock_irqsave(&wakeup_lock, flags); ++ ++ cpu_wakeup_task = per_cpu(wakeup_task, cpu); ++ ++ if (cpu_wakeup_task == NULL) ++ goto out; ++ ++ /* Already running? */ ++ if (unlikely(current == cpu_wakeup_task)) ++ goto out_reset; ++ ++ if (next != cpu_wakeup_task) { ++ if (next->prio < cpu_wakeup_task->prio) ++ goto out_reset; ++ ++ if (next->prio == cpu_wakeup_task->prio) ++ per_cpu(wakeup_sharedprio, cpu) = 1; ++ ++ goto out; ++ } ++ ++ if (current->prio == cpu_wakeup_task->prio) ++ per_cpu(wakeup_sharedprio, cpu) = 1; ++ ++ /* ++ * The task we are waiting for is about to be switched to. ++ * Calculate latency and store it in histogram. ++ */ ++ stop = ftrace_now(raw_smp_processor_id()); ++ ++ latency = ((long) (stop - next->preempt_timestamp_hist)) / ++ NSECS_PER_USECS; ++ ++ if (per_cpu(wakeup_sharedprio, cpu)) { ++ latency_hist(WAKEUP_LATENCY_SHAREDPRIO, cpu, latency, 0, stop, ++ next); ++ per_cpu(wakeup_sharedprio, cpu) = 0; ++ } else { ++ latency_hist(WAKEUP_LATENCY, cpu, latency, 0, stop, next); ++#ifdef CONFIG_MISSED_TIMER_OFFSETS_HIST ++ if (timerandwakeup_enabled_data.enabled) { ++ latency_hist(TIMERANDWAKEUP_LATENCY, cpu, ++ next->timer_offset + latency, next->timer_offset, ++ stop, next); ++ } ++#endif ++ } ++ ++out_reset: ++#ifdef CONFIG_MISSED_TIMER_OFFSETS_HIST ++ next->timer_offset = 0; ++#endif ++ put_task_struct(cpu_wakeup_task); ++ per_cpu(wakeup_task, cpu) = NULL; ++out: ++ raw_spin_unlock_irqrestore(&wakeup_lock, flags); ++} ++#endif ++ ++#ifdef CONFIG_MISSED_TIMER_OFFSETS_HIST ++static notrace void probe_hrtimer_interrupt(void *v, int cpu, ++ long long latency_ns, struct task_struct *curr, ++ struct task_struct *task) ++{ ++ if (latency_ns <= 0 && task != NULL && rt_task(task) && ++ (task->prio < curr->prio || ++ (task->prio == curr->prio && ++ !cpumask_test_cpu(cpu, &task->cpus_allowed)))) { ++ long latency; ++ cycle_t now; ++ ++ if (missed_timer_offsets_pid) { ++ if (likely(missed_timer_offsets_pid != ++ task_pid_nr(task))) ++ return; ++ } ++ ++ now = ftrace_now(cpu); ++ latency = (long) div_s64(-latency_ns, NSECS_PER_USECS); ++ latency_hist(MISSED_TIMER_OFFSETS, cpu, latency, latency, now, ++ task); ++#ifdef CONFIG_WAKEUP_LATENCY_HIST ++ task->timer_offset = latency; ++#endif ++ } ++} ++#endif ++ ++static __init int latency_hist_init(void) ++{ ++ struct dentry *latency_hist_root = NULL; ++ struct dentry *dentry; ++#ifdef CONFIG_WAKEUP_LATENCY_HIST ++ struct dentry *dentry_sharedprio; ++#endif ++ struct dentry *entry; ++ struct dentry *enable_root; ++ int i = 0; ++ struct hist_data *my_hist; ++ char name[64]; ++ char *cpufmt = "CPU%d"; ++#if defined(CONFIG_WAKEUP_LATENCY_HIST) || \ ++ defined(CONFIG_MISSED_TIMER_OFFSETS_HIST) ++ char *cpufmt_maxlatproc = "max_latency-CPU%d"; ++ struct maxlatproc_data *mp = NULL; ++#endif ++ ++ dentry = tracing_init_dentry(); ++ latency_hist_root = debugfs_create_dir(latency_hist_dir_root, dentry); ++ enable_root = debugfs_create_dir("enable", latency_hist_root); ++ ++#ifdef CONFIG_INTERRUPT_OFF_HIST ++ dentry = debugfs_create_dir(irqsoff_hist_dir, latency_hist_root); ++ for_each_possible_cpu(i) { ++ sprintf(name, cpufmt, i); ++ entry = debugfs_create_file(name, 0444, dentry, ++ &per_cpu(irqsoff_hist, i), &latency_hist_fops); ++ my_hist = &per_cpu(irqsoff_hist, i); ++ atomic_set(&my_hist->hist_mode, 1); ++ my_hist->min_lat = LONG_MAX; ++ } ++ entry = debugfs_create_file("reset", 0644, dentry, ++ (void *)IRQSOFF_LATENCY, &latency_hist_reset_fops); ++#endif ++ ++#ifdef CONFIG_PREEMPT_OFF_HIST ++ dentry = debugfs_create_dir(preemptoff_hist_dir, ++ latency_hist_root); ++ for_each_possible_cpu(i) { ++ sprintf(name, cpufmt, i); ++ entry = debugfs_create_file(name, 0444, dentry, ++ &per_cpu(preemptoff_hist, i), &latency_hist_fops); ++ my_hist = &per_cpu(preemptoff_hist, i); ++ atomic_set(&my_hist->hist_mode, 1); ++ my_hist->min_lat = LONG_MAX; ++ } ++ entry = debugfs_create_file("reset", 0644, dentry, ++ (void *)PREEMPTOFF_LATENCY, &latency_hist_reset_fops); ++#endif ++ ++#if defined(CONFIG_INTERRUPT_OFF_HIST) && defined(CONFIG_PREEMPT_OFF_HIST) ++ dentry = debugfs_create_dir(preemptirqsoff_hist_dir, ++ latency_hist_root); ++ for_each_possible_cpu(i) { ++ sprintf(name, cpufmt, i); ++ entry = debugfs_create_file(name, 0444, dentry, ++ &per_cpu(preemptirqsoff_hist, i), &latency_hist_fops); ++ my_hist = &per_cpu(preemptirqsoff_hist, i); ++ atomic_set(&my_hist->hist_mode, 1); ++ my_hist->min_lat = LONG_MAX; ++ } ++ entry = debugfs_create_file("reset", 0644, dentry, ++ (void *)PREEMPTIRQSOFF_LATENCY, &latency_hist_reset_fops); ++#endif ++ ++#if defined(CONFIG_INTERRUPT_OFF_HIST) || defined(CONFIG_PREEMPT_OFF_HIST) ++ entry = debugfs_create_file("preemptirqsoff", 0644, ++ enable_root, (void *)&preemptirqsoff_enabled_data, ++ &enable_fops); ++#endif ++ ++#ifdef CONFIG_WAKEUP_LATENCY_HIST ++ dentry = debugfs_create_dir(wakeup_latency_hist_dir, ++ latency_hist_root); ++ dentry_sharedprio = debugfs_create_dir( ++ wakeup_latency_hist_dir_sharedprio, dentry); ++ for_each_possible_cpu(i) { ++ sprintf(name, cpufmt, i); ++ ++ entry = debugfs_create_file(name, 0444, dentry, ++ &per_cpu(wakeup_latency_hist, i), ++ &latency_hist_fops); ++ my_hist = &per_cpu(wakeup_latency_hist, i); ++ atomic_set(&my_hist->hist_mode, 1); ++ my_hist->min_lat = LONG_MAX; ++ ++ entry = debugfs_create_file(name, 0444, dentry_sharedprio, ++ &per_cpu(wakeup_latency_hist_sharedprio, i), ++ &latency_hist_fops); ++ my_hist = &per_cpu(wakeup_latency_hist_sharedprio, i); ++ atomic_set(&my_hist->hist_mode, 1); ++ my_hist->min_lat = LONG_MAX; ++ ++ sprintf(name, cpufmt_maxlatproc, i); ++ ++ mp = &per_cpu(wakeup_maxlatproc, i); ++ entry = debugfs_create_file(name, 0444, dentry, mp, ++ &maxlatproc_fops); ++ clear_maxlatprocdata(mp); ++ ++ mp = &per_cpu(wakeup_maxlatproc_sharedprio, i); ++ entry = debugfs_create_file(name, 0444, dentry_sharedprio, mp, ++ &maxlatproc_fops); ++ clear_maxlatprocdata(mp); ++ } ++ entry = debugfs_create_file("pid", 0644, dentry, ++ (void *)&wakeup_pid, &pid_fops); ++ entry = debugfs_create_file("reset", 0644, dentry, ++ (void *)WAKEUP_LATENCY, &latency_hist_reset_fops); ++ entry = debugfs_create_file("reset", 0644, dentry_sharedprio, ++ (void *)WAKEUP_LATENCY_SHAREDPRIO, &latency_hist_reset_fops); ++ entry = debugfs_create_file("wakeup", 0644, ++ enable_root, (void *)&wakeup_latency_enabled_data, ++ &enable_fops); ++#endif ++ ++#ifdef CONFIG_MISSED_TIMER_OFFSETS_HIST ++ dentry = debugfs_create_dir(missed_timer_offsets_dir, ++ latency_hist_root); ++ for_each_possible_cpu(i) { ++ sprintf(name, cpufmt, i); ++ entry = debugfs_create_file(name, 0444, dentry, ++ &per_cpu(missed_timer_offsets, i), &latency_hist_fops); ++ my_hist = &per_cpu(missed_timer_offsets, i); ++ atomic_set(&my_hist->hist_mode, 1); ++ my_hist->min_lat = LONG_MAX; ++ ++ sprintf(name, cpufmt_maxlatproc, i); ++ mp = &per_cpu(missed_timer_offsets_maxlatproc, i); ++ entry = debugfs_create_file(name, 0444, dentry, mp, ++ &maxlatproc_fops); ++ clear_maxlatprocdata(mp); ++ } ++ entry = debugfs_create_file("pid", 0644, dentry, ++ (void *)&missed_timer_offsets_pid, &pid_fops); ++ entry = debugfs_create_file("reset", 0644, dentry, ++ (void *)MISSED_TIMER_OFFSETS, &latency_hist_reset_fops); ++ entry = debugfs_create_file("missed_timer_offsets", 0644, ++ enable_root, (void *)&missed_timer_offsets_enabled_data, ++ &enable_fops); ++#endif ++ ++#if defined(CONFIG_WAKEUP_LATENCY_HIST) && \ ++ defined(CONFIG_MISSED_TIMER_OFFSETS_HIST) ++ dentry = debugfs_create_dir(timerandwakeup_latency_hist_dir, ++ latency_hist_root); ++ for_each_possible_cpu(i) { ++ sprintf(name, cpufmt, i); ++ entry = debugfs_create_file(name, 0444, dentry, ++ &per_cpu(timerandwakeup_latency_hist, i), ++ &latency_hist_fops); ++ my_hist = &per_cpu(timerandwakeup_latency_hist, i); ++ atomic_set(&my_hist->hist_mode, 1); ++ my_hist->min_lat = LONG_MAX; ++ ++ sprintf(name, cpufmt_maxlatproc, i); ++ mp = &per_cpu(timerandwakeup_maxlatproc, i); ++ entry = debugfs_create_file(name, 0444, dentry, mp, ++ &maxlatproc_fops); ++ clear_maxlatprocdata(mp); ++ } ++ entry = debugfs_create_file("reset", 0644, dentry, ++ (void *)TIMERANDWAKEUP_LATENCY, &latency_hist_reset_fops); ++ entry = debugfs_create_file("timerandwakeup", 0644, ++ enable_root, (void *)&timerandwakeup_enabled_data, ++ &enable_fops); ++#endif ++ return 0; ++} ++ ++device_initcall(latency_hist_init); +diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c +index 7bc56762ca35..84ffcb813263 100644 +--- a/kernel/trace/trace.c ++++ b/kernel/trace/trace.c +@@ -1897,6 +1897,7 @@ tracing_generic_entry_update(struct trace_entry *entry, unsigned long flags, + struct task_struct *tsk = current; + + entry->preempt_count = pc & 0xff; ++ entry->preempt_lazy_count = preempt_lazy_count(); + entry->pid = (tsk) ? tsk->pid : 0; + entry->flags = + #ifdef CONFIG_TRACE_IRQFLAGS_SUPPORT +@@ -1907,8 +1908,11 @@ tracing_generic_entry_update(struct trace_entry *entry, unsigned long flags, + ((pc & NMI_MASK ) ? TRACE_FLAG_NMI : 0) | + ((pc & HARDIRQ_MASK) ? TRACE_FLAG_HARDIRQ : 0) | + ((pc & SOFTIRQ_MASK) ? TRACE_FLAG_SOFTIRQ : 0) | +- (tif_need_resched() ? TRACE_FLAG_NEED_RESCHED : 0) | ++ (tif_need_resched_now() ? TRACE_FLAG_NEED_RESCHED : 0) | ++ (need_resched_lazy() ? TRACE_FLAG_NEED_RESCHED_LAZY : 0) | + (test_preempt_need_resched() ? TRACE_FLAG_PREEMPT_RESCHED : 0); ++ ++ entry->migrate_disable = (tsk) ? __migrate_disabled(tsk) & 0xFF : 0; + } + EXPORT_SYMBOL_GPL(tracing_generic_entry_update); + +@@ -2892,14 +2896,17 @@ get_total_entries(struct trace_buffer *buf, + + static void print_lat_help_header(struct seq_file *m) + { +- seq_puts(m, "# _------=> CPU# \n" +- "# / _-----=> irqs-off \n" +- "# | / _----=> need-resched \n" +- "# || / _---=> hardirq/softirq \n" +- "# ||| / _--=> preempt-depth \n" +- "# |||| / delay \n" +- "# cmd pid ||||| time | caller \n" +- "# \\ / ||||| \\ | / \n"); ++ seq_puts(m, "# _--------=> CPU# \n" ++ "# / _-------=> irqs-off \n" ++ "# | / _------=> need-resched \n" ++ "# || / _-----=> need-resched_lazy \n" ++ "# ||| / _----=> hardirq/softirq \n" ++ "# |||| / _---=> preempt-depth \n" ++ "# ||||| / _--=> preempt-lazy-depth\n" ++ "# |||||| / _-=> migrate-disable \n" ++ "# ||||||| / delay \n" ++ "# cmd pid |||||||| time | caller \n" ++ "# \\ / |||||||| \\ | / \n"); + } + + static void print_event_info(struct trace_buffer *buf, struct seq_file *m) +@@ -2925,11 +2932,14 @@ static void print_func_help_header_irq(struct trace_buffer *buf, struct seq_file + print_event_info(buf, m); + seq_puts(m, "# _-----=> irqs-off\n" + "# / _----=> need-resched\n" +- "# | / _---=> hardirq/softirq\n" +- "# || / _--=> preempt-depth\n" +- "# ||| / delay\n" +- "# TASK-PID CPU# |||| TIMESTAMP FUNCTION\n" +- "# | | | |||| | |\n"); ++ "# |/ _-----=> need-resched_lazy\n" ++ "# || / _---=> hardirq/softirq\n" ++ "# ||| / _--=> preempt-depth\n" ++ "# |||| / _-=> preempt-lazy-depth\n" ++ "# ||||| / _-=> migrate-disable \n" ++ "# |||||| / delay\n" ++ "# TASK-PID CPU# ||||||| TIMESTAMP FUNCTION\n" ++ "# | | | ||||||| | |\n"); + } + + void +diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h +index f783df416726..6f2d0fa4fbf1 100644 +--- a/kernel/trace/trace.h ++++ b/kernel/trace/trace.h +@@ -123,6 +123,7 @@ struct kretprobe_trace_entry_head { + * NEED_RESCHED - reschedule is requested + * HARDIRQ - inside an interrupt handler + * SOFTIRQ - inside a softirq handler ++ * NEED_RESCHED_LAZY - lazy reschedule is requested + */ + enum trace_flag_type { + TRACE_FLAG_IRQS_OFF = 0x01, +@@ -132,6 +133,7 @@ enum trace_flag_type { + TRACE_FLAG_SOFTIRQ = 0x10, + TRACE_FLAG_PREEMPT_RESCHED = 0x20, + TRACE_FLAG_NMI = 0x40, ++ TRACE_FLAG_NEED_RESCHED_LAZY = 0x80, + }; + + #define TRACE_BUF_SIZE 1024 +diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c +index 03c0a48c3ac4..0b85d516b491 100644 +--- a/kernel/trace/trace_events.c ++++ b/kernel/trace/trace_events.c +@@ -187,6 +187,8 @@ static int trace_define_common_fields(void) + __common_field(unsigned char, flags); + __common_field(unsigned char, preempt_count); + __common_field(int, pid); ++ __common_field(unsigned short, migrate_disable); ++ __common_field(unsigned short, padding); + + return ret; + } +diff --git a/kernel/trace/trace_irqsoff.c b/kernel/trace/trace_irqsoff.c +index 03cdff84d026..940bd10b4406 100644 +--- a/kernel/trace/trace_irqsoff.c ++++ b/kernel/trace/trace_irqsoff.c +@@ -13,6 +13,7 @@ + #include <linux/uaccess.h> + #include <linux/module.h> + #include <linux/ftrace.h> ++#include <trace/events/hist.h> + + #include "trace.h" + +@@ -424,11 +425,13 @@ void start_critical_timings(void) + { + if (preempt_trace() || irq_trace()) + start_critical_timing(CALLER_ADDR0, CALLER_ADDR1); ++ trace_preemptirqsoff_hist_rcuidle(TRACE_START, 1); + } + EXPORT_SYMBOL_GPL(start_critical_timings); + + void stop_critical_timings(void) + { ++ trace_preemptirqsoff_hist_rcuidle(TRACE_STOP, 0); + if (preempt_trace() || irq_trace()) + stop_critical_timing(CALLER_ADDR0, CALLER_ADDR1); + } +@@ -438,6 +441,7 @@ EXPORT_SYMBOL_GPL(stop_critical_timings); + #ifdef CONFIG_PROVE_LOCKING + void time_hardirqs_on(unsigned long a0, unsigned long a1) + { ++ trace_preemptirqsoff_hist_rcuidle(IRQS_ON, 0); + if (!preempt_trace() && irq_trace()) + stop_critical_timing(a0, a1); + } +@@ -446,6 +450,7 @@ void time_hardirqs_off(unsigned long a0, unsigned long a1) + { + if (!preempt_trace() && irq_trace()) + start_critical_timing(a0, a1); ++ trace_preemptirqsoff_hist_rcuidle(IRQS_OFF, 1); + } + + #else /* !CONFIG_PROVE_LOCKING */ +@@ -471,6 +476,7 @@ inline void print_irqtrace_events(struct task_struct *curr) + */ + void trace_hardirqs_on(void) + { ++ trace_preemptirqsoff_hist(IRQS_ON, 0); + if (!preempt_trace() && irq_trace()) + stop_critical_timing(CALLER_ADDR0, CALLER_ADDR1); + } +@@ -480,11 +486,13 @@ void trace_hardirqs_off(void) + { + if (!preempt_trace() && irq_trace()) + start_critical_timing(CALLER_ADDR0, CALLER_ADDR1); ++ trace_preemptirqsoff_hist(IRQS_OFF, 1); + } + EXPORT_SYMBOL(trace_hardirqs_off); + + __visible void trace_hardirqs_on_caller(unsigned long caller_addr) + { ++ trace_preemptirqsoff_hist(IRQS_ON, 0); + if (!preempt_trace() && irq_trace()) + stop_critical_timing(CALLER_ADDR0, caller_addr); + } +@@ -494,6 +502,7 @@ __visible void trace_hardirqs_off_caller(unsigned long caller_addr) + { + if (!preempt_trace() && irq_trace()) + start_critical_timing(CALLER_ADDR0, caller_addr); ++ trace_preemptirqsoff_hist(IRQS_OFF, 1); + } + EXPORT_SYMBOL(trace_hardirqs_off_caller); + +@@ -503,12 +512,14 @@ EXPORT_SYMBOL(trace_hardirqs_off_caller); + #ifdef CONFIG_PREEMPT_TRACER + void trace_preempt_on(unsigned long a0, unsigned long a1) + { ++ trace_preemptirqsoff_hist(PREEMPT_ON, 0); + if (preempt_trace() && !irq_trace()) + stop_critical_timing(a0, a1); + } + + void trace_preempt_off(unsigned long a0, unsigned long a1) + { ++ trace_preemptirqsoff_hist(PREEMPT_ON, 1); + if (preempt_trace() && !irq_trace()) + start_critical_timing(a0, a1); + } +diff --git a/kernel/trace/trace_output.c b/kernel/trace/trace_output.c +index 0bb9cf2d53e6..455a7464772f 100644 +--- a/kernel/trace/trace_output.c ++++ b/kernel/trace/trace_output.c +@@ -386,6 +386,7 @@ int trace_print_lat_fmt(struct trace_seq *s, struct trace_entry *entry) + { + char hardsoft_irq; + char need_resched; ++ char need_resched_lazy; + char irqs_off; + int hardirq; + int softirq; +@@ -416,6 +417,9 @@ int trace_print_lat_fmt(struct trace_seq *s, struct trace_entry *entry) + break; + } + ++ need_resched_lazy = ++ (entry->flags & TRACE_FLAG_NEED_RESCHED_LAZY) ? 'L' : '.'; ++ + hardsoft_irq = + (nmi && hardirq) ? 'Z' : + nmi ? 'z' : +@@ -424,14 +428,25 @@ int trace_print_lat_fmt(struct trace_seq *s, struct trace_entry *entry) + softirq ? 's' : + '.' ; + +- trace_seq_printf(s, "%c%c%c", +- irqs_off, need_resched, hardsoft_irq); ++ trace_seq_printf(s, "%c%c%c%c", ++ irqs_off, need_resched, need_resched_lazy, ++ hardsoft_irq); + + if (entry->preempt_count) + trace_seq_printf(s, "%x", entry->preempt_count); + else + trace_seq_putc(s, '.'); + ++ if (entry->preempt_lazy_count) ++ trace_seq_printf(s, "%x", entry->preempt_lazy_count); ++ else ++ trace_seq_putc(s, '.'); ++ ++ if (entry->migrate_disable) ++ trace_seq_printf(s, "%x", entry->migrate_disable); ++ else ++ trace_seq_putc(s, '.'); ++ + return !trace_seq_has_overflowed(s); + } + +diff --git a/kernel/user.c b/kernel/user.c +index b069ccbfb0b0..1a2e88e98b5e 100644 +--- a/kernel/user.c ++++ b/kernel/user.c +@@ -161,11 +161,11 @@ void free_uid(struct user_struct *up) + if (!up) + return; + +- local_irq_save(flags); ++ local_irq_save_nort(flags); + if (atomic_dec_and_lock(&up->__count, &uidhash_lock)) + free_user(up, flags); + else +- local_irq_restore(flags); ++ local_irq_restore_nort(flags); + } + + struct user_struct *alloc_uid(kuid_t uid) +diff --git a/kernel/watchdog.c b/kernel/watchdog.c +index 9acb29f280ec..caba62080411 100644 +--- a/kernel/watchdog.c ++++ b/kernel/watchdog.c +@@ -315,6 +315,8 @@ static int is_softlockup(unsigned long touch_ts) + + #ifdef CONFIG_HARDLOCKUP_DETECTOR + ++static DEFINE_RAW_SPINLOCK(watchdog_output_lock); ++ + static struct perf_event_attr wd_hw_attr = { + .type = PERF_TYPE_HARDWARE, + .config = PERF_COUNT_HW_CPU_CYCLES, +@@ -349,6 +351,13 @@ static void watchdog_overflow_callback(struct perf_event *event, + /* only print hardlockups once */ + if (__this_cpu_read(hard_watchdog_warn) == true) + return; ++ /* ++ * If early-printk is enabled then make sure we do not ++ * lock up in printk() and kill console logging: ++ */ ++ printk_kill(); ++ ++ raw_spin_lock(&watchdog_output_lock); + + pr_emerg("Watchdog detected hard LOCKUP on cpu %d", this_cpu); + print_modules(); +@@ -366,6 +375,7 @@ static void watchdog_overflow_callback(struct perf_event *event, + !test_and_set_bit(0, &hardlockup_allcpu_dumped)) + trigger_allbutself_cpu_backtrace(); + ++ raw_spin_unlock(&watchdog_output_lock); + if (hardlockup_panic) + nmi_panic(regs, "Hard LOCKUP"); + +@@ -513,6 +523,7 @@ static void watchdog_enable(unsigned int cpu) + /* kick off the timer for the hardlockup detector */ + hrtimer_init(hrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); + hrtimer->function = watchdog_timer_fn; ++ hrtimer->irqsafe = 1; + + /* Enable the perf event */ + watchdog_nmi_enable(cpu); +diff --git a/kernel/workqueue.c b/kernel/workqueue.c +index ef071ca73fc3..c7a62d6adb00 100644 +--- a/kernel/workqueue.c ++++ b/kernel/workqueue.c +@@ -48,6 +48,8 @@ + #include <linux/nodemask.h> + #include <linux/moduleparam.h> + #include <linux/uaccess.h> ++#include <linux/locallock.h> ++#include <linux/delay.h> + + #include "workqueue_internal.h" + +@@ -121,11 +123,16 @@ enum { + * cpu or grabbing pool->lock is enough for read access. If + * POOL_DISASSOCIATED is set, it's identical to L. + * ++ * On RT we need the extra protection via rt_lock_idle_list() for ++ * the list manipulations against read access from ++ * wq_worker_sleeping(). All other places are nicely serialized via ++ * pool->lock. ++ * + * A: pool->attach_mutex protected. + * + * PL: wq_pool_mutex protected. + * +- * PR: wq_pool_mutex protected for writes. Sched-RCU protected for reads. ++ * PR: wq_pool_mutex protected for writes. RCU protected for reads. + * + * PW: wq_pool_mutex and wq->mutex protected for writes. Either for reads. + * +@@ -134,7 +141,7 @@ enum { + * + * WQ: wq->mutex protected. + * +- * WR: wq->mutex protected for writes. Sched-RCU protected for reads. ++ * WR: wq->mutex protected for writes. RCU protected for reads. + * + * MD: wq_mayday_lock protected. + */ +@@ -185,7 +192,7 @@ struct worker_pool { + atomic_t nr_running ____cacheline_aligned_in_smp; + + /* +- * Destruction of pool is sched-RCU protected to allow dereferences ++ * Destruction of pool is RCU protected to allow dereferences + * from get_work_pool(). + */ + struct rcu_head rcu; +@@ -214,7 +221,7 @@ struct pool_workqueue { + /* + * Release of unbound pwq is punted to system_wq. See put_pwq() + * and pwq_unbound_release_workfn() for details. pool_workqueue +- * itself is also sched-RCU protected so that the first pwq can be ++ * itself is also RCU protected so that the first pwq can be + * determined without grabbing wq->mutex. + */ + struct work_struct unbound_release_work; +@@ -348,6 +355,8 @@ EXPORT_SYMBOL_GPL(system_power_efficient_wq); + struct workqueue_struct *system_freezable_power_efficient_wq __read_mostly; + EXPORT_SYMBOL_GPL(system_freezable_power_efficient_wq); + ++static DEFINE_LOCAL_IRQ_LOCK(pendingb_lock); ++ + static int worker_thread(void *__worker); + static void workqueue_sysfs_unregister(struct workqueue_struct *wq); + +@@ -355,20 +364,20 @@ static void workqueue_sysfs_unregister(struct workqueue_struct *wq); + #include <trace/events/workqueue.h> + + #define assert_rcu_or_pool_mutex() \ +- RCU_LOCKDEP_WARN(!rcu_read_lock_sched_held() && \ ++ RCU_LOCKDEP_WARN(!rcu_read_lock_held() && \ + !lockdep_is_held(&wq_pool_mutex), \ +- "sched RCU or wq_pool_mutex should be held") ++ "RCU or wq_pool_mutex should be held") + + #define assert_rcu_or_wq_mutex(wq) \ +- RCU_LOCKDEP_WARN(!rcu_read_lock_sched_held() && \ ++ RCU_LOCKDEP_WARN(!rcu_read_lock_held() && \ + !lockdep_is_held(&wq->mutex), \ +- "sched RCU or wq->mutex should be held") ++ "RCU or wq->mutex should be held") + + #define assert_rcu_or_wq_mutex_or_pool_mutex(wq) \ +- RCU_LOCKDEP_WARN(!rcu_read_lock_sched_held() && \ ++ RCU_LOCKDEP_WARN(!rcu_read_lock_held() && \ + !lockdep_is_held(&wq->mutex) && \ + !lockdep_is_held(&wq_pool_mutex), \ +- "sched RCU, wq->mutex or wq_pool_mutex should be held") ++ "RCU, wq->mutex or wq_pool_mutex should be held") + + #define for_each_cpu_worker_pool(pool, cpu) \ + for ((pool) = &per_cpu(cpu_worker_pools, cpu)[0]; \ +@@ -380,7 +389,7 @@ static void workqueue_sysfs_unregister(struct workqueue_struct *wq); + * @pool: iteration cursor + * @pi: integer used for iteration + * +- * This must be called either with wq_pool_mutex held or sched RCU read ++ * This must be called either with wq_pool_mutex held or RCU read + * locked. If the pool needs to be used beyond the locking in effect, the + * caller is responsible for guaranteeing that the pool stays online. + * +@@ -412,7 +421,7 @@ static void workqueue_sysfs_unregister(struct workqueue_struct *wq); + * @pwq: iteration cursor + * @wq: the target workqueue + * +- * This must be called either with wq->mutex held or sched RCU read locked. ++ * This must be called either with wq->mutex held or RCU read locked. + * If the pwq needs to be used beyond the locking in effect, the caller is + * responsible for guaranteeing that the pwq stays online. + * +@@ -424,6 +433,31 @@ static void workqueue_sysfs_unregister(struct workqueue_struct *wq); + if (({ assert_rcu_or_wq_mutex(wq); false; })) { } \ + else + ++#ifdef CONFIG_PREEMPT_RT_BASE ++static inline void rt_lock_idle_list(struct worker_pool *pool) ++{ ++ preempt_disable(); ++} ++static inline void rt_unlock_idle_list(struct worker_pool *pool) ++{ ++ preempt_enable(); ++} ++static inline void sched_lock_idle_list(struct worker_pool *pool) { } ++static inline void sched_unlock_idle_list(struct worker_pool *pool) { } ++#else ++static inline void rt_lock_idle_list(struct worker_pool *pool) { } ++static inline void rt_unlock_idle_list(struct worker_pool *pool) { } ++static inline void sched_lock_idle_list(struct worker_pool *pool) ++{ ++ spin_lock_irq(&pool->lock); ++} ++static inline void sched_unlock_idle_list(struct worker_pool *pool) ++{ ++ spin_unlock_irq(&pool->lock); ++} ++#endif ++ ++ + #ifdef CONFIG_DEBUG_OBJECTS_WORK + + static struct debug_obj_descr work_debug_descr; +@@ -548,7 +582,7 @@ static int worker_pool_assign_id(struct worker_pool *pool) + * @wq: the target workqueue + * @node: the node ID + * +- * This must be called with any of wq_pool_mutex, wq->mutex or sched RCU ++ * This must be called with any of wq_pool_mutex, wq->mutex or RCU + * read locked. + * If the pwq needs to be used beyond the locking in effect, the caller is + * responsible for guaranteeing that the pwq stays online. +@@ -692,8 +726,8 @@ static struct pool_workqueue *get_work_pwq(struct work_struct *work) + * @work: the work item of interest + * + * Pools are created and destroyed under wq_pool_mutex, and allows read +- * access under sched-RCU read lock. As such, this function should be +- * called under wq_pool_mutex or with preemption disabled. ++ * access under RCU read lock. As such, this function should be ++ * called under wq_pool_mutex or inside of a rcu_read_lock() region. + * + * All fields of the returned pool are accessible as long as the above + * mentioned locking is in effect. If the returned pool needs to be used +@@ -830,50 +864,45 @@ static struct worker *first_idle_worker(struct worker_pool *pool) + */ + static void wake_up_worker(struct worker_pool *pool) + { +- struct worker *worker = first_idle_worker(pool); ++ struct worker *worker; ++ ++ rt_lock_idle_list(pool); ++ ++ worker = first_idle_worker(pool); + + if (likely(worker)) + wake_up_process(worker->task); ++ ++ rt_unlock_idle_list(pool); + } + + /** +- * wq_worker_waking_up - a worker is waking up ++ * wq_worker_running - a worker is running again + * @task: task waking up +- * @cpu: CPU @task is waking up to + * +- * This function is called during try_to_wake_up() when a worker is +- * being awoken. +- * +- * CONTEXT: +- * spin_lock_irq(rq->lock) ++ * This function is called when a worker returns from schedule() + */ +-void wq_worker_waking_up(struct task_struct *task, int cpu) ++void wq_worker_running(struct task_struct *task) + { + struct worker *worker = kthread_data(task); + +- if (!(worker->flags & WORKER_NOT_RUNNING)) { +- WARN_ON_ONCE(worker->pool->cpu != cpu); ++ if (!worker->sleeping) ++ return; ++ if (!(worker->flags & WORKER_NOT_RUNNING)) + atomic_inc(&worker->pool->nr_running); +- } ++ worker->sleeping = 0; + } + + /** + * wq_worker_sleeping - a worker is going to sleep + * @task: task going to sleep + * +- * This function is called during schedule() when a busy worker is +- * going to sleep. Worker on the same cpu can be woken up by +- * returning pointer to its task. +- * +- * CONTEXT: +- * spin_lock_irq(rq->lock) +- * +- * Return: +- * Worker task on @cpu to wake up, %NULL if none. ++ * This function is called from schedule() when a busy worker is ++ * going to sleep. + */ +-struct task_struct *wq_worker_sleeping(struct task_struct *task) ++void wq_worker_sleeping(struct task_struct *task) + { +- struct worker *worker = kthread_data(task), *to_wakeup = NULL; ++ struct worker *worker = kthread_data(task); + struct worker_pool *pool; + + /* +@@ -882,29 +911,26 @@ struct task_struct *wq_worker_sleeping(struct task_struct *task) + * checking NOT_RUNNING. + */ + if (worker->flags & WORKER_NOT_RUNNING) +- return NULL; ++ return; + + pool = worker->pool; + +- /* this can only happen on the local cpu */ +- if (WARN_ON_ONCE(pool->cpu != raw_smp_processor_id())) +- return NULL; ++ if (WARN_ON_ONCE(worker->sleeping)) ++ return; ++ ++ worker->sleeping = 1; + + /* + * The counterpart of the following dec_and_test, implied mb, + * worklist not empty test sequence is in insert_work(). + * Please read comment there. +- * +- * NOT_RUNNING is clear. This means that we're bound to and +- * running on the local cpu w/ rq lock held and preemption +- * disabled, which in turn means that none else could be +- * manipulating idle_list, so dereferencing idle_list without pool +- * lock is safe. + */ + if (atomic_dec_and_test(&pool->nr_running) && +- !list_empty(&pool->worklist)) +- to_wakeup = first_idle_worker(pool); +- return to_wakeup ? to_wakeup->task : NULL; ++ !list_empty(&pool->worklist)) { ++ sched_lock_idle_list(pool); ++ wake_up_worker(pool); ++ sched_unlock_idle_list(pool); ++ } + } + + /** +@@ -1098,12 +1124,12 @@ static void put_pwq_unlocked(struct pool_workqueue *pwq) + { + if (pwq) { + /* +- * As both pwqs and pools are sched-RCU protected, the ++ * As both pwqs and pools are RCU protected, the + * following lock operations are safe. + */ +- spin_lock_irq(&pwq->pool->lock); ++ local_spin_lock_irq(pendingb_lock, &pwq->pool->lock); + put_pwq(pwq); +- spin_unlock_irq(&pwq->pool->lock); ++ local_spin_unlock_irq(pendingb_lock, &pwq->pool->lock); + } + } + +@@ -1207,7 +1233,7 @@ static int try_to_grab_pending(struct work_struct *work, bool is_dwork, + struct worker_pool *pool; + struct pool_workqueue *pwq; + +- local_irq_save(*flags); ++ local_lock_irqsave(pendingb_lock, *flags); + + /* try to steal the timer if it exists */ + if (is_dwork) { +@@ -1226,6 +1252,7 @@ static int try_to_grab_pending(struct work_struct *work, bool is_dwork, + if (!test_and_set_bit(WORK_STRUCT_PENDING_BIT, work_data_bits(work))) + return 0; + ++ rcu_read_lock(); + /* + * The queueing is in progress, or it is already queued. Try to + * steal it from ->worklist without clearing WORK_STRUCT_PENDING. +@@ -1264,14 +1291,16 @@ static int try_to_grab_pending(struct work_struct *work, bool is_dwork, + set_work_pool_and_keep_pending(work, pool->id); + + spin_unlock(&pool->lock); ++ rcu_read_unlock(); + return 1; + } + spin_unlock(&pool->lock); + fail: +- local_irq_restore(*flags); ++ rcu_read_unlock(); ++ local_unlock_irqrestore(pendingb_lock, *flags); + if (work_is_canceling(work)) + return -ENOENT; +- cpu_relax(); ++ cpu_chill(); + return -EAGAIN; + } + +@@ -1373,7 +1402,7 @@ static void __queue_work(int cpu, struct workqueue_struct *wq, + * queued or lose PENDING. Grabbing PENDING and queueing should + * happen with IRQ disabled. + */ +- WARN_ON_ONCE(!irqs_disabled()); ++ WARN_ON_ONCE_NONRT(!irqs_disabled()); + + debug_work_activate(work); + +@@ -1381,6 +1410,7 @@ static void __queue_work(int cpu, struct workqueue_struct *wq, + if (unlikely(wq->flags & __WQ_DRAINING) && + WARN_ON_ONCE(!is_chained_work(wq))) + return; ++ rcu_read_lock(); + retry: + if (req_cpu == WORK_CPU_UNBOUND) + cpu = wq_select_unbound_cpu(raw_smp_processor_id()); +@@ -1437,10 +1467,8 @@ static void __queue_work(int cpu, struct workqueue_struct *wq, + /* pwq determined, queue */ + trace_workqueue_queue_work(req_cpu, pwq, work); + +- if (WARN_ON(!list_empty(&work->entry))) { +- spin_unlock(&pwq->pool->lock); +- return; +- } ++ if (WARN_ON(!list_empty(&work->entry))) ++ goto out; + + pwq->nr_in_flight[pwq->work_color]++; + work_flags = work_color_to_flags(pwq->work_color); +@@ -1458,7 +1486,9 @@ static void __queue_work(int cpu, struct workqueue_struct *wq, + + insert_work(pwq, work, worklist, work_flags); + ++out: + spin_unlock(&pwq->pool->lock); ++ rcu_read_unlock(); + } + + /** +@@ -1478,14 +1508,14 @@ bool queue_work_on(int cpu, struct workqueue_struct *wq, + bool ret = false; + unsigned long flags; + +- local_irq_save(flags); ++ local_lock_irqsave(pendingb_lock,flags); + + if (!test_and_set_bit(WORK_STRUCT_PENDING_BIT, work_data_bits(work))) { + __queue_work(cpu, wq, work); + ret = true; + } + +- local_irq_restore(flags); ++ local_unlock_irqrestore(pendingb_lock, flags); + return ret; + } + EXPORT_SYMBOL(queue_work_on); +@@ -1552,14 +1582,14 @@ bool queue_delayed_work_on(int cpu, struct workqueue_struct *wq, + unsigned long flags; + + /* read the comment in __queue_work() */ +- local_irq_save(flags); ++ local_lock_irqsave(pendingb_lock, flags); + + if (!test_and_set_bit(WORK_STRUCT_PENDING_BIT, work_data_bits(work))) { + __queue_delayed_work(cpu, wq, dwork, delay); + ret = true; + } + +- local_irq_restore(flags); ++ local_unlock_irqrestore(pendingb_lock, flags); + return ret; + } + EXPORT_SYMBOL(queue_delayed_work_on); +@@ -1594,7 +1624,7 @@ bool mod_delayed_work_on(int cpu, struct workqueue_struct *wq, + + if (likely(ret >= 0)) { + __queue_delayed_work(cpu, wq, dwork, delay); +- local_irq_restore(flags); ++ local_unlock_irqrestore(pendingb_lock, flags); + } + + /* -ENOENT from try_to_grab_pending() becomes %true */ +@@ -1627,7 +1657,9 @@ static void worker_enter_idle(struct worker *worker) + worker->last_active = jiffies; + + /* idle_list is LIFO */ ++ rt_lock_idle_list(pool); + list_add(&worker->entry, &pool->idle_list); ++ rt_unlock_idle_list(pool); + + if (too_many_workers(pool) && !timer_pending(&pool->idle_timer)) + mod_timer(&pool->idle_timer, jiffies + IDLE_WORKER_TIMEOUT); +@@ -1660,7 +1692,9 @@ static void worker_leave_idle(struct worker *worker) + return; + worker_clr_flags(worker, WORKER_IDLE); + pool->nr_idle--; ++ rt_lock_idle_list(pool); + list_del_init(&worker->entry); ++ rt_unlock_idle_list(pool); + } + + static struct worker *alloc_worker(int node) +@@ -1826,7 +1860,9 @@ static void destroy_worker(struct worker *worker) + pool->nr_workers--; + pool->nr_idle--; + ++ rt_lock_idle_list(pool); + list_del_init(&worker->entry); ++ rt_unlock_idle_list(pool); + worker->flags |= WORKER_DIE; + wake_up_process(worker->task); + } +@@ -2785,14 +2821,14 @@ static bool start_flush_work(struct work_struct *work, struct wq_barrier *barr) + + might_sleep(); + +- local_irq_disable(); ++ rcu_read_lock(); + pool = get_work_pool(work); + if (!pool) { +- local_irq_enable(); ++ rcu_read_unlock(); + return false; + } + +- spin_lock(&pool->lock); ++ spin_lock_irq(&pool->lock); + /* see the comment in try_to_grab_pending() with the same code */ + pwq = get_work_pwq(work); + if (pwq) { +@@ -2821,10 +2857,11 @@ static bool start_flush_work(struct work_struct *work, struct wq_barrier *barr) + else + lock_map_acquire_read(&pwq->wq->lockdep_map); + lock_map_release(&pwq->wq->lockdep_map); +- ++ rcu_read_unlock(); + return true; + already_gone: + spin_unlock_irq(&pool->lock); ++ rcu_read_unlock(); + return false; + } + +@@ -2911,7 +2948,7 @@ static bool __cancel_work_timer(struct work_struct *work, bool is_dwork) + + /* tell other tasks trying to grab @work to back off */ + mark_work_canceling(work); +- local_irq_restore(flags); ++ local_unlock_irqrestore(pendingb_lock, flags); + + flush_work(work); + clear_work_data(work); +@@ -2966,10 +3003,10 @@ EXPORT_SYMBOL_GPL(cancel_work_sync); + */ + bool flush_delayed_work(struct delayed_work *dwork) + { +- local_irq_disable(); ++ local_lock_irq(pendingb_lock); + if (del_timer_sync(&dwork->timer)) + __queue_work(dwork->cpu, dwork->wq, &dwork->work); +- local_irq_enable(); ++ local_unlock_irq(pendingb_lock); + return flush_work(&dwork->work); + } + EXPORT_SYMBOL(flush_delayed_work); +@@ -3004,7 +3041,7 @@ bool cancel_delayed_work(struct delayed_work *dwork) + + set_work_pool_and_clear_pending(&dwork->work, + get_work_pool_id(&dwork->work)); +- local_irq_restore(flags); ++ local_unlock_irqrestore(pendingb_lock, flags); + return ret; + } + EXPORT_SYMBOL(cancel_delayed_work); +@@ -3233,7 +3270,7 @@ static void rcu_free_pool(struct rcu_head *rcu) + * put_unbound_pool - put a worker_pool + * @pool: worker_pool to put + * +- * Put @pool. If its refcnt reaches zero, it gets destroyed in sched-RCU ++ * Put @pool. If its refcnt reaches zero, it gets destroyed in RCU + * safe manner. get_unbound_pool() calls this function on its failure path + * and this function should be able to release pools which went through, + * successfully or not, init_worker_pool(). +@@ -3287,8 +3324,8 @@ static void put_unbound_pool(struct worker_pool *pool) + del_timer_sync(&pool->idle_timer); + del_timer_sync(&pool->mayday_timer); + +- /* sched-RCU protected to allow dereferences from get_work_pool() */ +- call_rcu_sched(&pool->rcu, rcu_free_pool); ++ /* RCU protected to allow dereferences from get_work_pool() */ ++ call_rcu(&pool->rcu, rcu_free_pool); + } + + /** +@@ -3395,14 +3432,14 @@ static void pwq_unbound_release_workfn(struct work_struct *work) + put_unbound_pool(pool); + mutex_unlock(&wq_pool_mutex); + +- call_rcu_sched(&pwq->rcu, rcu_free_pwq); ++ call_rcu(&pwq->rcu, rcu_free_pwq); + + /* + * If we're the last pwq going away, @wq is already dead and no one + * is gonna access it anymore. Schedule RCU free. + */ + if (is_last) +- call_rcu_sched(&wq->rcu, rcu_free_wq); ++ call_rcu(&wq->rcu, rcu_free_wq); + } + + /** +@@ -4052,7 +4089,7 @@ void destroy_workqueue(struct workqueue_struct *wq) + * The base ref is never dropped on per-cpu pwqs. Directly + * schedule RCU free. + */ +- call_rcu_sched(&wq->rcu, rcu_free_wq); ++ call_rcu(&wq->rcu, rcu_free_wq); + } else { + /* + * We're the sole accessor of @wq at this point. Directly +@@ -4145,7 +4182,8 @@ bool workqueue_congested(int cpu, struct workqueue_struct *wq) + struct pool_workqueue *pwq; + bool ret; + +- rcu_read_lock_sched(); ++ rcu_read_lock(); ++ preempt_disable(); + + if (cpu == WORK_CPU_UNBOUND) + cpu = smp_processor_id(); +@@ -4156,7 +4194,8 @@ bool workqueue_congested(int cpu, struct workqueue_struct *wq) + pwq = unbound_pwq_by_node(wq, cpu_to_node(cpu)); + + ret = !list_empty(&pwq->delayed_works); +- rcu_read_unlock_sched(); ++ preempt_enable(); ++ rcu_read_unlock(); + + return ret; + } +@@ -4182,15 +4221,15 @@ unsigned int work_busy(struct work_struct *work) + if (work_pending(work)) + ret |= WORK_BUSY_PENDING; + +- local_irq_save(flags); ++ rcu_read_lock(); + pool = get_work_pool(work); + if (pool) { +- spin_lock(&pool->lock); ++ spin_lock_irqsave(&pool->lock, flags); + if (find_worker_executing_work(pool, work)) + ret |= WORK_BUSY_RUNNING; +- spin_unlock(&pool->lock); ++ spin_unlock_irqrestore(&pool->lock, flags); + } +- local_irq_restore(flags); ++ rcu_read_unlock(); + + return ret; + } +@@ -4379,7 +4418,7 @@ void show_workqueue_state(void) + unsigned long flags; + int pi; + +- rcu_read_lock_sched(); ++ rcu_read_lock(); + + pr_info("Showing busy workqueues and worker pools:\n"); + +@@ -4432,7 +4471,7 @@ void show_workqueue_state(void) + spin_unlock_irqrestore(&pool->lock, flags); + } + +- rcu_read_unlock_sched(); ++ rcu_read_unlock(); + } + + /* +@@ -4770,16 +4809,16 @@ bool freeze_workqueues_busy(void) + * nr_active is monotonically decreasing. It's safe + * to peek without lock. + */ +- rcu_read_lock_sched(); ++ rcu_read_lock(); + for_each_pwq(pwq, wq) { + WARN_ON_ONCE(pwq->nr_active < 0); + if (pwq->nr_active) { + busy = true; +- rcu_read_unlock_sched(); ++ rcu_read_unlock(); + goto out_unlock; + } + } +- rcu_read_unlock_sched(); ++ rcu_read_unlock(); + } + out_unlock: + mutex_unlock(&wq_pool_mutex); +@@ -4969,7 +5008,8 @@ static ssize_t wq_pool_ids_show(struct device *dev, + const char *delim = ""; + int node, written = 0; + +- rcu_read_lock_sched(); ++ get_online_cpus(); ++ rcu_read_lock(); + for_each_node(node) { + written += scnprintf(buf + written, PAGE_SIZE - written, + "%s%d:%d", delim, node, +@@ -4977,7 +5017,8 @@ static ssize_t wq_pool_ids_show(struct device *dev, + delim = " "; + } + written += scnprintf(buf + written, PAGE_SIZE - written, "\n"); +- rcu_read_unlock_sched(); ++ rcu_read_unlock(); ++ put_online_cpus(); + + return written; + } +diff --git a/kernel/workqueue_internal.h b/kernel/workqueue_internal.h +index 8635417c587b..f000c4d6917e 100644 +--- a/kernel/workqueue_internal.h ++++ b/kernel/workqueue_internal.h +@@ -43,6 +43,7 @@ struct worker { + unsigned long last_active; /* L: last active timestamp */ + unsigned int flags; /* X: flags */ + int id; /* I: worker id */ ++ int sleeping; /* None */ + + /* + * Opaque string set with work_set_desc(). Printed out with task +@@ -68,7 +69,7 @@ static inline struct worker *current_wq_worker(void) + * Scheduler hooks for concurrency managed workqueue. Only to be used from + * sched/core.c and workqueue.c. + */ +-void wq_worker_waking_up(struct task_struct *task, int cpu); +-struct task_struct *wq_worker_sleeping(struct task_struct *task); ++void wq_worker_running(struct task_struct *task); ++void wq_worker_sleeping(struct task_struct *task); + + #endif /* _KERNEL_WORKQUEUE_INTERNAL_H */ +diff --git a/lib/Kconfig b/lib/Kconfig +index d79909dc01ec..fd2accb2f2bb 100644 +--- a/lib/Kconfig ++++ b/lib/Kconfig +@@ -400,6 +400,7 @@ config CHECK_SIGNATURE + + config CPUMASK_OFFSTACK + bool "Force CPU masks off stack" if DEBUG_PER_CPU_MAPS ++ depends on !PREEMPT_RT_FULL + help + Use dynamic allocation for cpumask_var_t, instead of putting + them on the stack. This is a bit more expensive, but avoids +diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug +index cab7405f48d2..dbc49c48ff53 100644 +--- a/lib/Kconfig.debug ++++ b/lib/Kconfig.debug +@@ -977,6 +977,7 @@ config TIMER_STATS + config DEBUG_PREEMPT + bool "Debug preemptible kernel" + depends on DEBUG_KERNEL && PREEMPT && TRACE_IRQFLAGS_SUPPORT ++ select USING_GET_LOCK_PARENT_IP + default y + help + If you say Y here then the kernel will use a debug variant of the +@@ -1159,8 +1160,17 @@ config LOCK_TORTURE_TEST + + endmenu # lock debugging + ++config USING_GET_LOCK_PARENT_IP ++ bool ++ help ++ Enables the use of the function get_lock_parent_ip() that ++ will use __builtin_return_address(n) with n > 0 causing ++ some gcc warnings. When this is selected, those warnings ++ will be suppressed. ++ + config TRACE_IRQFLAGS + bool ++ select USING_GET_LOCK_PARENT_IP + help + Enables hooks to interrupt enabling and disabling for + either tracing or lock debugging. +diff --git a/lib/debugobjects.c b/lib/debugobjects.c +index a8e12601eb37..c76d5f0beafe 100644 +--- a/lib/debugobjects.c ++++ b/lib/debugobjects.c +@@ -308,7 +308,10 @@ __debug_object_init(void *addr, struct debug_obj_descr *descr, int onstack) + struct debug_obj *obj; + unsigned long flags; + +- fill_pool(); ++#ifdef CONFIG_PREEMPT_RT_FULL ++ if (preempt_count() == 0 && !irqs_disabled()) ++#endif ++ fill_pool(); + + db = get_bucket((unsigned long) addr); + +diff --git a/lib/idr.c b/lib/idr.c +index 6098336df267..9decbe914595 100644 +--- a/lib/idr.c ++++ b/lib/idr.c +@@ -30,6 +30,7 @@ + #include <linux/idr.h> + #include <linux/spinlock.h> + #include <linux/percpu.h> ++#include <linux/locallock.h> + + #define MAX_IDR_SHIFT (sizeof(int) * 8 - 1) + #define MAX_IDR_BIT (1U << MAX_IDR_SHIFT) +@@ -45,6 +46,37 @@ static DEFINE_PER_CPU(struct idr_layer *, idr_preload_head); + static DEFINE_PER_CPU(int, idr_preload_cnt); + static DEFINE_SPINLOCK(simple_ida_lock); + ++#ifdef CONFIG_PREEMPT_RT_FULL ++static DEFINE_LOCAL_IRQ_LOCK(idr_lock); ++ ++static inline void idr_preload_lock(void) ++{ ++ local_lock(idr_lock); ++} ++ ++static inline void idr_preload_unlock(void) ++{ ++ local_unlock(idr_lock); ++} ++ ++void idr_preload_end(void) ++{ ++ idr_preload_unlock(); ++} ++EXPORT_SYMBOL(idr_preload_end); ++#else ++static inline void idr_preload_lock(void) ++{ ++ preempt_disable(); ++} ++ ++static inline void idr_preload_unlock(void) ++{ ++ preempt_enable(); ++} ++#endif ++ ++ + /* the maximum ID which can be allocated given idr->layers */ + static int idr_max(int layers) + { +@@ -115,14 +147,14 @@ static struct idr_layer *idr_layer_alloc(gfp_t gfp_mask, struct idr *layer_idr) + * context. See idr_preload() for details. + */ + if (!in_interrupt()) { +- preempt_disable(); ++ idr_preload_lock(); + new = __this_cpu_read(idr_preload_head); + if (new) { + __this_cpu_write(idr_preload_head, new->ary[0]); + __this_cpu_dec(idr_preload_cnt); + new->ary[0] = NULL; + } +- preempt_enable(); ++ idr_preload_unlock(); + if (new) + return new; + } +@@ -366,7 +398,6 @@ static void idr_fill_slot(struct idr *idr, void *ptr, int id, + idr_mark_full(pa, id); + } + +- + /** + * idr_preload - preload for idr_alloc() + * @gfp_mask: allocation mask to use for preloading +@@ -401,7 +432,7 @@ void idr_preload(gfp_t gfp_mask) + WARN_ON_ONCE(in_interrupt()); + might_sleep_if(gfpflags_allow_blocking(gfp_mask)); + +- preempt_disable(); ++ idr_preload_lock(); + + /* + * idr_alloc() is likely to succeed w/o full idr_layer buffer and +@@ -413,9 +444,9 @@ void idr_preload(gfp_t gfp_mask) + while (__this_cpu_read(idr_preload_cnt) < MAX_IDR_FREE) { + struct idr_layer *new; + +- preempt_enable(); ++ idr_preload_unlock(); + new = kmem_cache_zalloc(idr_layer_cache, gfp_mask); +- preempt_disable(); ++ idr_preload_lock(); + if (!new) + break; + +diff --git a/lib/irq_poll.c b/lib/irq_poll.c +index 836f7db4e548..709d4eed1df9 100644 +--- a/lib/irq_poll.c ++++ b/lib/irq_poll.c +@@ -36,6 +36,7 @@ void irq_poll_sched(struct irq_poll *iop) + list_add_tail(&iop->list, this_cpu_ptr(&blk_cpu_iopoll)); + __raise_softirq_irqoff(IRQ_POLL_SOFTIRQ); + local_irq_restore(flags); ++ preempt_check_resched_rt(); + } + EXPORT_SYMBOL(irq_poll_sched); + +@@ -71,6 +72,7 @@ void irq_poll_complete(struct irq_poll *iop) + local_irq_save(flags); + __irq_poll_complete(iop); + local_irq_restore(flags); ++ preempt_check_resched_rt(); + } + EXPORT_SYMBOL(irq_poll_complete); + +@@ -95,6 +97,7 @@ static void irq_poll_softirq(struct softirq_action *h) + } + + local_irq_enable(); ++ preempt_check_resched_rt(); + + /* Even though interrupts have been re-enabled, this + * access is safe because interrupts can only add new +@@ -132,6 +135,7 @@ static void irq_poll_softirq(struct softirq_action *h) + __raise_softirq_irqoff(IRQ_POLL_SOFTIRQ); + + local_irq_enable(); ++ preempt_check_resched_rt(); + } + + /** +@@ -199,6 +203,7 @@ static int irq_poll_cpu_notify(struct notifier_block *self, + this_cpu_ptr(&blk_cpu_iopoll)); + __raise_softirq_irqoff(IRQ_POLL_SOFTIRQ); + local_irq_enable(); ++ preempt_check_resched_rt(); + } + + return NOTIFY_OK; +diff --git a/lib/locking-selftest.c b/lib/locking-selftest.c +index 872a15a2a637..b93a6103fa4d 100644 +--- a/lib/locking-selftest.c ++++ b/lib/locking-selftest.c +@@ -590,6 +590,8 @@ GENERATE_TESTCASE(init_held_rsem) + #include "locking-selftest-spin-hardirq.h" + GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_hard_spin) + ++#ifndef CONFIG_PREEMPT_RT_FULL ++ + #include "locking-selftest-rlock-hardirq.h" + GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_hard_rlock) + +@@ -605,9 +607,12 @@ GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_soft_rlock) + #include "locking-selftest-wlock-softirq.h" + GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_soft_wlock) + ++#endif ++ + #undef E1 + #undef E2 + ++#ifndef CONFIG_PREEMPT_RT_FULL + /* + * Enabling hardirqs with a softirq-safe lock held: + */ +@@ -640,6 +645,8 @@ GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2A_rlock) + #undef E1 + #undef E2 + ++#endif ++ + /* + * Enabling irqs with an irq-safe lock held: + */ +@@ -663,6 +670,8 @@ GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2A_rlock) + #include "locking-selftest-spin-hardirq.h" + GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_hard_spin) + ++#ifndef CONFIG_PREEMPT_RT_FULL ++ + #include "locking-selftest-rlock-hardirq.h" + GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_hard_rlock) + +@@ -678,6 +687,8 @@ GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_soft_rlock) + #include "locking-selftest-wlock-softirq.h" + GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_soft_wlock) + ++#endif ++ + #undef E1 + #undef E2 + +@@ -709,6 +720,8 @@ GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_soft_wlock) + #include "locking-selftest-spin-hardirq.h" + GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_hard_spin) + ++#ifndef CONFIG_PREEMPT_RT_FULL ++ + #include "locking-selftest-rlock-hardirq.h" + GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_hard_rlock) + +@@ -724,6 +737,8 @@ GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_soft_rlock) + #include "locking-selftest-wlock-softirq.h" + GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_soft_wlock) + ++#endif ++ + #undef E1 + #undef E2 + #undef E3 +@@ -757,6 +772,8 @@ GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_soft_wlock) + #include "locking-selftest-spin-hardirq.h" + GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_hard_spin) + ++#ifndef CONFIG_PREEMPT_RT_FULL ++ + #include "locking-selftest-rlock-hardirq.h" + GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_hard_rlock) + +@@ -772,10 +789,14 @@ GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_soft_rlock) + #include "locking-selftest-wlock-softirq.h" + GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_soft_wlock) + ++#endif ++ + #undef E1 + #undef E2 + #undef E3 + ++#ifndef CONFIG_PREEMPT_RT_FULL ++ + /* + * read-lock / write-lock irq inversion. + * +@@ -838,6 +859,10 @@ GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_soft_wlock) + #undef E2 + #undef E3 + ++#endif ++ ++#ifndef CONFIG_PREEMPT_RT_FULL ++ + /* + * read-lock / write-lock recursion that is actually safe. + */ +@@ -876,6 +901,8 @@ GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion_soft) + #undef E2 + #undef E3 + ++#endif ++ + /* + * read-lock / write-lock recursion that is unsafe. + */ +@@ -1858,6 +1885,7 @@ void locking_selftest(void) + + printk(" --------------------------------------------------------------------------\n"); + ++#ifndef CONFIG_PREEMPT_RT_FULL + /* + * irq-context testcases: + */ +@@ -1870,6 +1898,28 @@ void locking_selftest(void) + + DO_TESTCASE_6x2("irq read-recursion", irq_read_recursion); + // DO_TESTCASE_6x2B("irq read-recursion #2", irq_read_recursion2); ++#else ++ /* On -rt, we only do hardirq context test for raw spinlock */ ++ DO_TESTCASE_1B("hard-irqs-on + irq-safe-A", irqsafe1_hard_spin, 12); ++ DO_TESTCASE_1B("hard-irqs-on + irq-safe-A", irqsafe1_hard_spin, 21); ++ ++ DO_TESTCASE_1B("hard-safe-A + irqs-on", irqsafe2B_hard_spin, 12); ++ DO_TESTCASE_1B("hard-safe-A + irqs-on", irqsafe2B_hard_spin, 21); ++ ++ DO_TESTCASE_1B("hard-safe-A + unsafe-B #1", irqsafe3_hard_spin, 123); ++ DO_TESTCASE_1B("hard-safe-A + unsafe-B #1", irqsafe3_hard_spin, 132); ++ DO_TESTCASE_1B("hard-safe-A + unsafe-B #1", irqsafe3_hard_spin, 213); ++ DO_TESTCASE_1B("hard-safe-A + unsafe-B #1", irqsafe3_hard_spin, 231); ++ DO_TESTCASE_1B("hard-safe-A + unsafe-B #1", irqsafe3_hard_spin, 312); ++ DO_TESTCASE_1B("hard-safe-A + unsafe-B #1", irqsafe3_hard_spin, 321); ++ ++ DO_TESTCASE_1B("hard-safe-A + unsafe-B #2", irqsafe4_hard_spin, 123); ++ DO_TESTCASE_1B("hard-safe-A + unsafe-B #2", irqsafe4_hard_spin, 132); ++ DO_TESTCASE_1B("hard-safe-A + unsafe-B #2", irqsafe4_hard_spin, 213); ++ DO_TESTCASE_1B("hard-safe-A + unsafe-B #2", irqsafe4_hard_spin, 231); ++ DO_TESTCASE_1B("hard-safe-A + unsafe-B #2", irqsafe4_hard_spin, 312); ++ DO_TESTCASE_1B("hard-safe-A + unsafe-B #2", irqsafe4_hard_spin, 321); ++#endif + + ww_tests(); + +diff --git a/lib/percpu_ida.c b/lib/percpu_ida.c +index 6d40944960de..822a2c027e72 100644 +--- a/lib/percpu_ida.c ++++ b/lib/percpu_ida.c +@@ -26,6 +26,9 @@ + #include <linux/string.h> + #include <linux/spinlock.h> + #include <linux/percpu_ida.h> ++#include <linux/locallock.h> ++ ++static DEFINE_LOCAL_IRQ_LOCK(irq_off_lock); + + struct percpu_ida_cpu { + /* +@@ -148,13 +151,13 @@ int percpu_ida_alloc(struct percpu_ida *pool, int state) + unsigned long flags; + int tag; + +- local_irq_save(flags); ++ local_lock_irqsave(irq_off_lock, flags); + tags = this_cpu_ptr(pool->tag_cpu); + + /* Fastpath */ + tag = alloc_local_tag(tags); + if (likely(tag >= 0)) { +- local_irq_restore(flags); ++ local_unlock_irqrestore(irq_off_lock, flags); + return tag; + } + +@@ -173,6 +176,7 @@ int percpu_ida_alloc(struct percpu_ida *pool, int state) + + if (!tags->nr_free) + alloc_global_tags(pool, tags); ++ + if (!tags->nr_free) + steal_tags(pool, tags); + +@@ -184,7 +188,7 @@ int percpu_ida_alloc(struct percpu_ida *pool, int state) + } + + spin_unlock(&pool->lock); +- local_irq_restore(flags); ++ local_unlock_irqrestore(irq_off_lock, flags); + + if (tag >= 0 || state == TASK_RUNNING) + break; +@@ -196,7 +200,7 @@ int percpu_ida_alloc(struct percpu_ida *pool, int state) + + schedule(); + +- local_irq_save(flags); ++ local_lock_irqsave(irq_off_lock, flags); + tags = this_cpu_ptr(pool->tag_cpu); + } + if (state != TASK_RUNNING) +@@ -221,7 +225,7 @@ void percpu_ida_free(struct percpu_ida *pool, unsigned tag) + + BUG_ON(tag >= pool->nr_tags); + +- local_irq_save(flags); ++ local_lock_irqsave(irq_off_lock, flags); + tags = this_cpu_ptr(pool->tag_cpu); + + spin_lock(&tags->lock); +@@ -253,7 +257,7 @@ void percpu_ida_free(struct percpu_ida *pool, unsigned tag) + spin_unlock(&pool->lock); + } + +- local_irq_restore(flags); ++ local_unlock_irqrestore(irq_off_lock, flags); + } + EXPORT_SYMBOL_GPL(percpu_ida_free); + +@@ -345,7 +349,7 @@ int percpu_ida_for_each_free(struct percpu_ida *pool, percpu_ida_cb fn, + struct percpu_ida_cpu *remote; + unsigned cpu, i, err = 0; + +- local_irq_save(flags); ++ local_lock_irqsave(irq_off_lock, flags); + for_each_possible_cpu(cpu) { + remote = per_cpu_ptr(pool->tag_cpu, cpu); + spin_lock(&remote->lock); +@@ -367,7 +371,7 @@ int percpu_ida_for_each_free(struct percpu_ida *pool, percpu_ida_cb fn, + } + spin_unlock(&pool->lock); + out: +- local_irq_restore(flags); ++ local_unlock_irqrestore(irq_off_lock, flags); + return err; + } + EXPORT_SYMBOL_GPL(percpu_ida_for_each_free); +diff --git a/lib/radix-tree.c b/lib/radix-tree.c +index 8e6d552c40dd..881cc195d85f 100644 +--- a/lib/radix-tree.c ++++ b/lib/radix-tree.c +@@ -290,13 +290,14 @@ radix_tree_node_alloc(struct radix_tree_root *root) + * succeed in getting a node here (and never reach + * kmem_cache_alloc) + */ +- rtp = this_cpu_ptr(&radix_tree_preloads); ++ rtp = &get_cpu_var(radix_tree_preloads); + if (rtp->nr) { + ret = rtp->nodes; + rtp->nodes = ret->private_data; + ret->private_data = NULL; + rtp->nr--; + } ++ put_cpu_var(radix_tree_preloads); + /* + * Update the allocation stack trace as this is more useful + * for debugging. +@@ -336,6 +337,7 @@ radix_tree_node_free(struct radix_tree_node *node) + call_rcu(&node->rcu_head, radix_tree_node_rcu_free); + } + ++#ifndef CONFIG_PREEMPT_RT_FULL + /* + * Load up this CPU's radix_tree_node buffer with sufficient objects to + * ensure that the addition of a single element in the tree cannot fail. On +@@ -455,6 +457,7 @@ int radix_tree_maybe_preload_order(gfp_t gfp_mask, int order) + + return __radix_tree_preload(gfp_mask, nr_nodes); + } ++#endif + + /* + * The maximum index which can be stored in a radix tree +diff --git a/lib/scatterlist.c b/lib/scatterlist.c +index 004fc70fc56a..ccc46992a517 100644 +--- a/lib/scatterlist.c ++++ b/lib/scatterlist.c +@@ -620,7 +620,7 @@ void sg_miter_stop(struct sg_mapping_iter *miter) + flush_kernel_dcache_page(miter->page); + + if (miter->__flags & SG_MITER_ATOMIC) { +- WARN_ON_ONCE(preemptible()); ++ WARN_ON_ONCE(!pagefault_disabled()); + kunmap_atomic(miter->addr); + } else + kunmap(miter->page); +@@ -664,7 +664,7 @@ size_t sg_copy_buffer(struct scatterlist *sgl, unsigned int nents, void *buf, + if (!sg_miter_skip(&miter, skip)) + return false; + +- local_irq_save(flags); ++ local_irq_save_nort(flags); + + while (sg_miter_next(&miter) && offset < buflen) { + unsigned int len; +@@ -681,7 +681,7 @@ size_t sg_copy_buffer(struct scatterlist *sgl, unsigned int nents, void *buf, + + sg_miter_stop(&miter); + +- local_irq_restore(flags); ++ local_irq_restore_nort(flags); + return offset; + } + EXPORT_SYMBOL(sg_copy_buffer); +diff --git a/lib/smp_processor_id.c b/lib/smp_processor_id.c +index 1afec32de6f2..11fa431046a8 100644 +--- a/lib/smp_processor_id.c ++++ b/lib/smp_processor_id.c +@@ -39,8 +39,9 @@ notrace static unsigned int check_preemption_disabled(const char *what1, + if (!printk_ratelimit()) + goto out_enable; + +- printk(KERN_ERR "BUG: using %s%s() in preemptible [%08x] code: %s/%d\n", +- what1, what2, preempt_count() - 1, current->comm, current->pid); ++ printk(KERN_ERR "BUG: using %s%s() in preemptible [%08x %08x] code: %s/%d\n", ++ what1, what2, preempt_count() - 1, __migrate_disabled(current), ++ current->comm, current->pid); + + print_symbol("caller is %s\n", (long)__builtin_return_address(0)); + dump_stack(); +diff --git a/mm/Kconfig b/mm/Kconfig +index be0ee11fa0d9..fe2857d67973 100644 +--- a/mm/Kconfig ++++ b/mm/Kconfig +@@ -410,7 +410,7 @@ config NOMMU_INITIAL_TRIM_EXCESS + + config TRANSPARENT_HUGEPAGE + bool "Transparent Hugepage Support" +- depends on HAVE_ARCH_TRANSPARENT_HUGEPAGE ++ depends on HAVE_ARCH_TRANSPARENT_HUGEPAGE && !PREEMPT_RT_FULL + select COMPACTION + select RADIX_TREE_MULTIORDER + help +diff --git a/mm/backing-dev.c b/mm/backing-dev.c +index 8fde443f36d7..d7a863b0ec20 100644 +--- a/mm/backing-dev.c ++++ b/mm/backing-dev.c +@@ -457,9 +457,9 @@ void wb_congested_put(struct bdi_writeback_congested *congested) + { + unsigned long flags; + +- local_irq_save(flags); ++ local_irq_save_nort(flags); + if (!atomic_dec_and_lock(&congested->refcnt, &cgwb_lock)) { +- local_irq_restore(flags); ++ local_irq_restore_nort(flags); + return; + } + +diff --git a/mm/compaction.c b/mm/compaction.c +index 9affb2908304..d5eb0e52e96f 100644 +--- a/mm/compaction.c ++++ b/mm/compaction.c +@@ -1585,10 +1585,12 @@ static enum compact_result compact_zone(struct zone *zone, struct compact_contro + block_start_pfn(cc->migrate_pfn, cc->order); + + if (cc->last_migrated_pfn < current_block_start) { +- cpu = get_cpu(); ++ cpu = get_cpu_light(); ++ local_lock_irq(swapvec_lock); + lru_add_drain_cpu(cpu); ++ local_unlock_irq(swapvec_lock); + drain_local_pages(zone); +- put_cpu(); ++ put_cpu_light(); + /* No more flushing until we migrate again */ + cc->last_migrated_pfn = 0; + } +diff --git a/mm/filemap.c b/mm/filemap.c +index ced9ef6c06b0..19f6f0d77604 100644 +--- a/mm/filemap.c ++++ b/mm/filemap.c +@@ -159,9 +159,12 @@ static int page_cache_tree_insert(struct address_space *mapping, + * node->private_list is protected by + * mapping->tree_lock. + */ +- if (!list_empty(&node->private_list)) +- list_lru_del(&workingset_shadow_nodes, ++ if (!list_empty(&node->private_list)) { ++ local_lock(workingset_shadow_lock); ++ list_lru_del(&__workingset_shadow_nodes, + &node->private_list); ++ local_unlock(workingset_shadow_lock); ++ } + } + return 0; + } +@@ -217,8 +220,10 @@ static void page_cache_tree_delete(struct address_space *mapping, + if (!dax_mapping(mapping) && !workingset_node_pages(node) && + list_empty(&node->private_list)) { + node->private_data = mapping; +- list_lru_add(&workingset_shadow_nodes, +- &node->private_list); ++ local_lock(workingset_shadow_lock); ++ list_lru_add(&__workingset_shadow_nodes, ++ &node->private_list); ++ local_unlock(workingset_shadow_lock); + } + } + +diff --git a/mm/highmem.c b/mm/highmem.c +index 50b4ca6787f0..77518a3b35a1 100644 +--- a/mm/highmem.c ++++ b/mm/highmem.c +@@ -29,10 +29,11 @@ + #include <linux/kgdb.h> + #include <asm/tlbflush.h> + +- ++#ifndef CONFIG_PREEMPT_RT_FULL + #if defined(CONFIG_HIGHMEM) || defined(CONFIG_X86_32) + DEFINE_PER_CPU(int, __kmap_atomic_idx); + #endif ++#endif + + /* + * Virtual_count is not a pure "count". +@@ -107,8 +108,9 @@ static inline wait_queue_head_t *get_pkmap_wait_queue_head(unsigned int color) + unsigned long totalhigh_pages __read_mostly; + EXPORT_SYMBOL(totalhigh_pages); + +- ++#ifndef CONFIG_PREEMPT_RT_FULL + EXPORT_PER_CPU_SYMBOL(__kmap_atomic_idx); ++#endif + + unsigned int nr_free_highpages (void) + { +diff --git a/mm/memcontrol.c b/mm/memcontrol.c +index 4be518d4e68a..724240ca2f35 100644 +--- a/mm/memcontrol.c ++++ b/mm/memcontrol.c +@@ -67,6 +67,7 @@ + #include <net/sock.h> + #include <net/ip.h> + #include "slab.h" ++#include <linux/locallock.h> + + #include <asm/uaccess.h> + +@@ -92,6 +93,8 @@ int do_swap_account __read_mostly; + #define do_swap_account 0 + #endif + ++static DEFINE_LOCAL_IRQ_LOCK(event_lock); ++ + /* Whether legacy memory+swap accounting is active */ + static bool do_memsw_account(void) + { +@@ -1724,6 +1727,7 @@ struct memcg_stock_pcp { + #define FLUSHING_CACHED_CHARGE 0 + }; + static DEFINE_PER_CPU(struct memcg_stock_pcp, memcg_stock); ++static DEFINE_LOCAL_IRQ_LOCK(memcg_stock_ll); + static DEFINE_MUTEX(percpu_charge_mutex); + + /** +@@ -1746,7 +1750,7 @@ static bool consume_stock(struct mem_cgroup *memcg, unsigned int nr_pages) + if (nr_pages > CHARGE_BATCH) + return ret; + +- local_irq_save(flags); ++ local_lock_irqsave(memcg_stock_ll, flags); + + stock = this_cpu_ptr(&memcg_stock); + if (memcg == stock->cached && stock->nr_pages >= nr_pages) { +@@ -1754,7 +1758,7 @@ static bool consume_stock(struct mem_cgroup *memcg, unsigned int nr_pages) + ret = true; + } + +- local_irq_restore(flags); ++ local_unlock_irqrestore(memcg_stock_ll, flags); + + return ret; + } +@@ -1781,13 +1785,13 @@ static void drain_local_stock(struct work_struct *dummy) + struct memcg_stock_pcp *stock; + unsigned long flags; + +- local_irq_save(flags); ++ local_lock_irqsave(memcg_stock_ll, flags); + + stock = this_cpu_ptr(&memcg_stock); + drain_stock(stock); + clear_bit(FLUSHING_CACHED_CHARGE, &stock->flags); + +- local_irq_restore(flags); ++ local_unlock_irqrestore(memcg_stock_ll, flags); + } + + /* +@@ -1799,7 +1803,7 @@ static void refill_stock(struct mem_cgroup *memcg, unsigned int nr_pages) + struct memcg_stock_pcp *stock; + unsigned long flags; + +- local_irq_save(flags); ++ local_lock_irqsave(memcg_stock_ll, flags); + + stock = this_cpu_ptr(&memcg_stock); + if (stock->cached != memcg) { /* reset if necessary */ +@@ -1808,7 +1812,7 @@ static void refill_stock(struct mem_cgroup *memcg, unsigned int nr_pages) + } + stock->nr_pages += nr_pages; + +- local_irq_restore(flags); ++ local_unlock_irqrestore(memcg_stock_ll, flags); + } + + /* +@@ -1824,7 +1828,7 @@ static void drain_all_stock(struct mem_cgroup *root_memcg) + return; + /* Notify other cpus that system-wide "drain" is running */ + get_online_cpus(); +- curcpu = get_cpu(); ++ curcpu = get_cpu_light(); + for_each_online_cpu(cpu) { + struct memcg_stock_pcp *stock = &per_cpu(memcg_stock, cpu); + struct mem_cgroup *memcg; +@@ -1841,7 +1845,7 @@ static void drain_all_stock(struct mem_cgroup *root_memcg) + schedule_work_on(cpu, &stock->work); + } + } +- put_cpu(); ++ put_cpu_light(); + put_online_cpus(); + mutex_unlock(&percpu_charge_mutex); + } +@@ -4566,12 +4570,12 @@ static int mem_cgroup_move_account(struct page *page, + + ret = 0; + +- local_irq_disable(); ++ local_lock_irq(event_lock); + mem_cgroup_charge_statistics(to, page, compound, nr_pages); + memcg_check_events(to, page); + mem_cgroup_charge_statistics(from, page, compound, -nr_pages); + memcg_check_events(from, page); +- local_irq_enable(); ++ local_unlock_irq(event_lock); + out_unlock: + unlock_page(page); + out: +@@ -5444,10 +5448,10 @@ void mem_cgroup_commit_charge(struct page *page, struct mem_cgroup *memcg, + + commit_charge(page, memcg, lrucare); + +- local_irq_disable(); ++ local_lock_irq(event_lock); + mem_cgroup_charge_statistics(memcg, page, compound, nr_pages); + memcg_check_events(memcg, page); +- local_irq_enable(); ++ local_unlock_irq(event_lock); + + if (do_memsw_account() && PageSwapCache(page)) { + swp_entry_t entry = { .val = page_private(page) }; +@@ -5503,14 +5507,14 @@ static void uncharge_batch(struct mem_cgroup *memcg, unsigned long pgpgout, + memcg_oom_recover(memcg); + } + +- local_irq_save(flags); ++ local_lock_irqsave(event_lock, flags); + __this_cpu_sub(memcg->stat->count[MEM_CGROUP_STAT_RSS], nr_anon); + __this_cpu_sub(memcg->stat->count[MEM_CGROUP_STAT_CACHE], nr_file); + __this_cpu_sub(memcg->stat->count[MEM_CGROUP_STAT_RSS_HUGE], nr_huge); + __this_cpu_add(memcg->stat->events[MEM_CGROUP_EVENTS_PGPGOUT], pgpgout); + __this_cpu_add(memcg->stat->nr_page_events, nr_pages); + memcg_check_events(memcg, dummy_page); +- local_irq_restore(flags); ++ local_unlock_irqrestore(event_lock, flags); + + if (!mem_cgroup_is_root(memcg)) + css_put_many(&memcg->css, nr_pages); +@@ -5665,10 +5669,10 @@ void mem_cgroup_migrate(struct page *oldpage, struct page *newpage) + + commit_charge(newpage, memcg, false); + +- local_irq_save(flags); ++ local_lock_irqsave(event_lock, flags); + mem_cgroup_charge_statistics(memcg, newpage, compound, nr_pages); + memcg_check_events(memcg, newpage); +- local_irq_restore(flags); ++ local_unlock_irqrestore(event_lock, flags); + } + + DEFINE_STATIC_KEY_FALSE(memcg_sockets_enabled_key); +@@ -5845,6 +5849,7 @@ void mem_cgroup_swapout(struct page *page, swp_entry_t entry) + { + struct mem_cgroup *memcg, *swap_memcg; + unsigned short oldid; ++ unsigned long flags; + + VM_BUG_ON_PAGE(PageLRU(page), page); + VM_BUG_ON_PAGE(page_count(page), page); +@@ -5885,12 +5890,16 @@ void mem_cgroup_swapout(struct page *page, swp_entry_t entry) + * important here to have the interrupts disabled because it is the + * only synchronisation we have for udpating the per-CPU variables. + */ ++ local_lock_irqsave(event_lock, flags); ++#ifndef CONFIG_PREEMPT_RT_BASE + VM_BUG_ON(!irqs_disabled()); ++#endif + mem_cgroup_charge_statistics(memcg, page, false, -1); + memcg_check_events(memcg, page); + + if (!mem_cgroup_is_root(memcg)) + css_put(&memcg->css); ++ local_unlock_irqrestore(event_lock, flags); + } + + /* +diff --git a/mm/mmu_context.c b/mm/mmu_context.c +index 6f4d27c5bb32..5cd25c745a8f 100644 +--- a/mm/mmu_context.c ++++ b/mm/mmu_context.c +@@ -23,6 +23,7 @@ void use_mm(struct mm_struct *mm) + struct task_struct *tsk = current; + + task_lock(tsk); ++ preempt_disable_rt(); + active_mm = tsk->active_mm; + if (active_mm != mm) { + atomic_inc(&mm->mm_count); +@@ -30,6 +31,7 @@ void use_mm(struct mm_struct *mm) + } + tsk->mm = mm; + switch_mm(active_mm, mm, tsk); ++ preempt_enable_rt(); + task_unlock(tsk); + #ifdef finish_arch_post_lock_switch + finish_arch_post_lock_switch(); +diff --git a/mm/page_alloc.c b/mm/page_alloc.c +index a2214c64ed3c..4be4d5d66f73 100644 +--- a/mm/page_alloc.c ++++ b/mm/page_alloc.c +@@ -61,6 +61,7 @@ + #include <linux/page_ext.h> + #include <linux/hugetlb.h> + #include <linux/sched/rt.h> ++#include <linux/locallock.h> + #include <linux/page_owner.h> + #include <linux/kthread.h> + #include <linux/memcontrol.h> +@@ -276,6 +277,18 @@ EXPORT_SYMBOL(nr_node_ids); + EXPORT_SYMBOL(nr_online_nodes); + #endif + ++static DEFINE_LOCAL_IRQ_LOCK(pa_lock); ++ ++#ifdef CONFIG_PREEMPT_RT_BASE ++# define cpu_lock_irqsave(cpu, flags) \ ++ local_lock_irqsave_on(pa_lock, flags, cpu) ++# define cpu_unlock_irqrestore(cpu, flags) \ ++ local_unlock_irqrestore_on(pa_lock, flags, cpu) ++#else ++# define cpu_lock_irqsave(cpu, flags) local_irq_save(flags) ++# define cpu_unlock_irqrestore(cpu, flags) local_irq_restore(flags) ++#endif ++ + int page_group_by_mobility_disabled __read_mostly; + + #ifdef CONFIG_DEFERRED_STRUCT_PAGE_INIT +@@ -1056,7 +1069,7 @@ static bool bulkfree_pcp_prepare(struct page *page) + #endif /* CONFIG_DEBUG_VM */ + + /* +- * Frees a number of pages from the PCP lists ++ * Frees a number of pages which have been collected from the pcp lists. + * Assumes all pages on list are in same zone, and of same order. + * count is the number of pages to free. + * +@@ -1067,19 +1080,58 @@ static bool bulkfree_pcp_prepare(struct page *page) + * pinned" detection logic. + */ + static void free_pcppages_bulk(struct zone *zone, int count, +- struct per_cpu_pages *pcp) ++ struct list_head *list) + { +- int migratetype = 0; +- int batch_free = 0; + unsigned long nr_scanned; + bool isolated_pageblocks; ++ unsigned long flags; ++ ++ spin_lock_irqsave(&zone->lock, flags); + +- spin_lock(&zone->lock); + isolated_pageblocks = has_isolate_pageblock(zone); + nr_scanned = node_page_state(zone->zone_pgdat, NR_PAGES_SCANNED); + if (nr_scanned) + __mod_node_page_state(zone->zone_pgdat, NR_PAGES_SCANNED, -nr_scanned); + ++ while (!list_empty(list)) { ++ struct page *page; ++ int mt; /* migratetype of the to-be-freed page */ ++ ++ page = list_first_entry(list, struct page, lru); ++ /* must delete as __free_one_page list manipulates */ ++ list_del(&page->lru); ++ ++ mt = get_pcppage_migratetype(page); ++ /* MIGRATE_ISOLATE page should not go to pcplists */ ++ VM_BUG_ON_PAGE(is_migrate_isolate(mt), page); ++ /* Pageblock could have been isolated meanwhile */ ++ if (unlikely(isolated_pageblocks)) ++ mt = get_pageblock_migratetype(page); ++ ++ if (bulkfree_pcp_prepare(page)) ++ continue; ++ ++ __free_one_page(page, page_to_pfn(page), zone, 0, mt); ++ trace_mm_page_pcpu_drain(page, 0, mt); ++ count--; ++ } ++ WARN_ON(count != 0); ++ spin_unlock_irqrestore(&zone->lock, flags); ++} ++ ++/* ++ * Moves a number of pages from the PCP lists to free list which ++ * is freed outside of the locked region. ++ * ++ * Assumes all pages on list are in same zone, and of same order. ++ * count is the number of pages to free. ++ */ ++static void isolate_pcp_pages(int count, struct per_cpu_pages *src, ++ struct list_head *dst) ++{ ++ int migratetype = 0; ++ int batch_free = 0; ++ + while (count) { + struct page *page; + struct list_head *list; +@@ -1095,7 +1147,7 @@ static void free_pcppages_bulk(struct zone *zone, int count, + batch_free++; + if (++migratetype == MIGRATE_PCPTYPES) + migratetype = 0; +- list = &pcp->lists[migratetype]; ++ list = &src->lists[migratetype]; + } while (list_empty(list)); + + /* This is the only non-empty list. Free them all. */ +@@ -1103,27 +1155,12 @@ static void free_pcppages_bulk(struct zone *zone, int count, + batch_free = count; + + do { +- int mt; /* migratetype of the to-be-freed page */ +- + page = list_last_entry(list, struct page, lru); +- /* must delete as __free_one_page list manipulates */ + list_del(&page->lru); + +- mt = get_pcppage_migratetype(page); +- /* MIGRATE_ISOLATE page should not go to pcplists */ +- VM_BUG_ON_PAGE(is_migrate_isolate(mt), page); +- /* Pageblock could have been isolated meanwhile */ +- if (unlikely(isolated_pageblocks)) +- mt = get_pageblock_migratetype(page); +- +- if (bulkfree_pcp_prepare(page)) +- continue; +- +- __free_one_page(page, page_to_pfn(page), zone, 0, mt); +- trace_mm_page_pcpu_drain(page, 0, mt); ++ list_add(&page->lru, dst); + } while (--count && --batch_free && !list_empty(list)); + } +- spin_unlock(&zone->lock); + } + + static void free_one_page(struct zone *zone, +@@ -1132,7 +1169,9 @@ static void free_one_page(struct zone *zone, + int migratetype) + { + unsigned long nr_scanned; +- spin_lock(&zone->lock); ++ unsigned long flags; ++ ++ spin_lock_irqsave(&zone->lock, flags); + nr_scanned = node_page_state(zone->zone_pgdat, NR_PAGES_SCANNED); + if (nr_scanned) + __mod_node_page_state(zone->zone_pgdat, NR_PAGES_SCANNED, -nr_scanned); +@@ -1142,7 +1181,7 @@ static void free_one_page(struct zone *zone, + migratetype = get_pfnblock_migratetype(page, pfn); + } + __free_one_page(page, pfn, zone, order, migratetype); +- spin_unlock(&zone->lock); ++ spin_unlock_irqrestore(&zone->lock, flags); + } + + static void __meminit __init_single_page(struct page *page, unsigned long pfn, +@@ -1228,10 +1267,10 @@ static void __free_pages_ok(struct page *page, unsigned int order) + return; + + migratetype = get_pfnblock_migratetype(page, pfn); +- local_irq_save(flags); ++ local_lock_irqsave(pa_lock, flags); + __count_vm_events(PGFREE, 1 << order); + free_one_page(page_zone(page), page, pfn, order, migratetype); +- local_irq_restore(flags); ++ local_unlock_irqrestore(pa_lock, flags); + } + + static void __init __free_pages_boot_core(struct page *page, unsigned int order) +@@ -2219,16 +2258,18 @@ static int rmqueue_bulk(struct zone *zone, unsigned int order, + void drain_zone_pages(struct zone *zone, struct per_cpu_pages *pcp) + { + unsigned long flags; ++ LIST_HEAD(dst); + int to_drain, batch; + +- local_irq_save(flags); ++ local_lock_irqsave(pa_lock, flags); + batch = READ_ONCE(pcp->batch); + to_drain = min(pcp->count, batch); + if (to_drain > 0) { +- free_pcppages_bulk(zone, to_drain, pcp); ++ isolate_pcp_pages(to_drain, pcp, &dst); + pcp->count -= to_drain; + } +- local_irq_restore(flags); ++ local_unlock_irqrestore(pa_lock, flags); ++ free_pcppages_bulk(zone, to_drain, &dst); + } + #endif + +@@ -2244,16 +2285,21 @@ static void drain_pages_zone(unsigned int cpu, struct zone *zone) + unsigned long flags; + struct per_cpu_pageset *pset; + struct per_cpu_pages *pcp; ++ LIST_HEAD(dst); ++ int count; + +- local_irq_save(flags); ++ cpu_lock_irqsave(cpu, flags); + pset = per_cpu_ptr(zone->pageset, cpu); + + pcp = &pset->pcp; +- if (pcp->count) { +- free_pcppages_bulk(zone, pcp->count, pcp); ++ count = pcp->count; ++ if (count) { ++ isolate_pcp_pages(count, pcp, &dst); + pcp->count = 0; + } +- local_irq_restore(flags); ++ cpu_unlock_irqrestore(cpu, flags); ++ if (count) ++ free_pcppages_bulk(zone, count, &dst); + } + + /* +@@ -2339,8 +2385,17 @@ void drain_all_pages(struct zone *zone) + else + cpumask_clear_cpu(cpu, &cpus_with_pcps); + } ++#ifndef CONFIG_PREEMPT_RT_BASE + on_each_cpu_mask(&cpus_with_pcps, (smp_call_func_t) drain_local_pages, + zone, 1); ++#else ++ for_each_cpu(cpu, &cpus_with_pcps) { ++ if (zone) ++ drain_pages_zone(cpu, zone); ++ else ++ drain_pages(cpu); ++ } ++#endif + } + + #ifdef CONFIG_HIBERNATION +@@ -2400,7 +2455,7 @@ void free_hot_cold_page(struct page *page, bool cold) + + migratetype = get_pfnblock_migratetype(page, pfn); + set_pcppage_migratetype(page, migratetype); +- local_irq_save(flags); ++ local_lock_irqsave(pa_lock, flags); + __count_vm_event(PGFREE); + + /* +@@ -2426,12 +2481,17 @@ void free_hot_cold_page(struct page *page, bool cold) + pcp->count++; + if (pcp->count >= pcp->high) { + unsigned long batch = READ_ONCE(pcp->batch); +- free_pcppages_bulk(zone, batch, pcp); ++ LIST_HEAD(dst); ++ ++ isolate_pcp_pages(batch, pcp, &dst); + pcp->count -= batch; ++ local_unlock_irqrestore(pa_lock, flags); ++ free_pcppages_bulk(zone, batch, &dst); ++ return; + } + + out: +- local_irq_restore(flags); ++ local_unlock_irqrestore(pa_lock, flags); + } + + /* +@@ -2568,7 +2628,7 @@ struct page *buffered_rmqueue(struct zone *preferred_zone, + struct per_cpu_pages *pcp; + struct list_head *list; + +- local_irq_save(flags); ++ local_lock_irqsave(pa_lock, flags); + do { + pcp = &this_cpu_ptr(zone->pageset)->pcp; + list = &pcp->lists[migratetype]; +@@ -2595,7 +2655,7 @@ struct page *buffered_rmqueue(struct zone *preferred_zone, + * allocate greater than order-1 page units with __GFP_NOFAIL. + */ + WARN_ON_ONCE((gfp_flags & __GFP_NOFAIL) && (order > 1)); +- spin_lock_irqsave(&zone->lock, flags); ++ local_spin_lock_irqsave(pa_lock, &zone->lock, flags); + + do { + page = NULL; +@@ -2607,22 +2667,24 @@ struct page *buffered_rmqueue(struct zone *preferred_zone, + if (!page) + page = __rmqueue(zone, order, migratetype); + } while (page && check_new_pages(page, order)); +- spin_unlock(&zone->lock); +- if (!page) ++ if (!page) { ++ spin_unlock(&zone->lock); + goto failed; ++ } + __mod_zone_freepage_state(zone, -(1 << order), + get_pcppage_migratetype(page)); ++ spin_unlock(&zone->lock); + } + + __count_zid_vm_events(PGALLOC, page_zonenum(page), 1 << order); + zone_statistics(preferred_zone, zone, gfp_flags); +- local_irq_restore(flags); ++ local_unlock_irqrestore(pa_lock, flags); + + VM_BUG_ON_PAGE(bad_range(zone, page), page); + return page; + + failed: +- local_irq_restore(flags); ++ local_unlock_irqrestore(pa_lock, flags); + return NULL; + } + +@@ -6528,7 +6590,9 @@ static int page_alloc_cpu_notify(struct notifier_block *self, + int cpu = (unsigned long)hcpu; + + if (action == CPU_DEAD || action == CPU_DEAD_FROZEN) { ++ local_lock_irq_on(swapvec_lock, cpu); + lru_add_drain_cpu(cpu); ++ local_unlock_irq_on(swapvec_lock, cpu); + drain_pages(cpu); + + /* +@@ -6554,6 +6618,7 @@ static int page_alloc_cpu_notify(struct notifier_block *self, + void __init page_alloc_init(void) + { + hotcpu_notifier(page_alloc_cpu_notify, 0); ++ local_irq_lock_init(pa_lock); + } + + /* +@@ -7370,7 +7435,7 @@ void zone_pcp_reset(struct zone *zone) + struct per_cpu_pageset *pset; + + /* avoid races with drain_pages() */ +- local_irq_save(flags); ++ local_lock_irqsave(pa_lock, flags); + if (zone->pageset != &boot_pageset) { + for_each_online_cpu(cpu) { + pset = per_cpu_ptr(zone->pageset, cpu); +@@ -7379,7 +7444,7 @@ void zone_pcp_reset(struct zone *zone) + free_percpu(zone->pageset); + zone->pageset = &boot_pageset; + } +- local_irq_restore(flags); ++ local_unlock_irqrestore(pa_lock, flags); + } + + #ifdef CONFIG_MEMORY_HOTREMOVE +diff --git a/mm/slab.h b/mm/slab.h +index 9653f2e2591a..b7371e026627 100644 +--- a/mm/slab.h ++++ b/mm/slab.h +@@ -426,7 +426,11 @@ static inline void slab_post_alloc_hook(struct kmem_cache *s, gfp_t flags, + * The slab lists for all objects. + */ + struct kmem_cache_node { ++#ifdef CONFIG_SLUB ++ raw_spinlock_t list_lock; ++#else + spinlock_t list_lock; ++#endif + + #ifdef CONFIG_SLAB + struct list_head slabs_partial; /* partial list first, better asm code */ +diff --git a/mm/slub.c b/mm/slub.c +index 9adae58462f8..4b386747f050 100644 +--- a/mm/slub.c ++++ b/mm/slub.c +@@ -1145,7 +1145,7 @@ static noinline int free_debug_processing( + unsigned long uninitialized_var(flags); + int ret = 0; + +- spin_lock_irqsave(&n->list_lock, flags); ++ raw_spin_lock_irqsave(&n->list_lock, flags); + slab_lock(page); + + if (s->flags & SLAB_CONSISTENCY_CHECKS) { +@@ -1180,7 +1180,7 @@ static noinline int free_debug_processing( + bulk_cnt, cnt); + + slab_unlock(page); +- spin_unlock_irqrestore(&n->list_lock, flags); ++ raw_spin_unlock_irqrestore(&n->list_lock, flags); + if (!ret) + slab_fix(s, "Object at 0x%p not freed", object); + return ret; +@@ -1308,6 +1308,12 @@ static inline void dec_slabs_node(struct kmem_cache *s, int node, + + #endif /* CONFIG_SLUB_DEBUG */ + ++struct slub_free_list { ++ raw_spinlock_t lock; ++ struct list_head list; ++}; ++static DEFINE_PER_CPU(struct slub_free_list, slub_free_list); ++ + /* + * Hooks for other subsystems that check memory allocations. In a typical + * production configuration these hooks all should produce no code at all. +@@ -1527,10 +1533,17 @@ static struct page *allocate_slab(struct kmem_cache *s, gfp_t flags, int node) + void *start, *p; + int idx, order; + bool shuffle; ++ bool enableirqs = false; + + flags &= gfp_allowed_mask; + + if (gfpflags_allow_blocking(flags)) ++ enableirqs = true; ++#ifdef CONFIG_PREEMPT_RT_FULL ++ if (system_state == SYSTEM_RUNNING) ++ enableirqs = true; ++#endif ++ if (enableirqs) + local_irq_enable(); + + flags |= s->allocflags; +@@ -1605,7 +1618,7 @@ static struct page *allocate_slab(struct kmem_cache *s, gfp_t flags, int node) + page->frozen = 1; + + out: +- if (gfpflags_allow_blocking(flags)) ++ if (enableirqs) + local_irq_disable(); + if (!page) + return NULL; +@@ -1664,6 +1677,16 @@ static void __free_slab(struct kmem_cache *s, struct page *page) + __free_pages(page, order); + } + ++static void free_delayed(struct list_head *h) ++{ ++ while(!list_empty(h)) { ++ struct page *page = list_first_entry(h, struct page, lru); ++ ++ list_del(&page->lru); ++ __free_slab(page->slab_cache, page); ++ } ++} ++ + #define need_reserve_slab_rcu \ + (sizeof(((struct page *)NULL)->lru) < sizeof(struct rcu_head)) + +@@ -1695,6 +1718,12 @@ static void free_slab(struct kmem_cache *s, struct page *page) + } + + call_rcu(head, rcu_free_slab); ++ } else if (irqs_disabled()) { ++ struct slub_free_list *f = this_cpu_ptr(&slub_free_list); ++ ++ raw_spin_lock(&f->lock); ++ list_add(&page->lru, &f->list); ++ raw_spin_unlock(&f->lock); + } else + __free_slab(s, page); + } +@@ -1802,7 +1831,7 @@ static void *get_partial_node(struct kmem_cache *s, struct kmem_cache_node *n, + if (!n || !n->nr_partial) + return NULL; + +- spin_lock(&n->list_lock); ++ raw_spin_lock(&n->list_lock); + list_for_each_entry_safe(page, page2, &n->partial, lru) { + void *t; + +@@ -1827,7 +1856,7 @@ static void *get_partial_node(struct kmem_cache *s, struct kmem_cache_node *n, + break; + + } +- spin_unlock(&n->list_lock); ++ raw_spin_unlock(&n->list_lock); + return object; + } + +@@ -2073,7 +2102,7 @@ static void deactivate_slab(struct kmem_cache *s, struct page *page, + * that acquire_slab() will see a slab page that + * is frozen + */ +- spin_lock(&n->list_lock); ++ raw_spin_lock(&n->list_lock); + } + } else { + m = M_FULL; +@@ -2084,7 +2113,7 @@ static void deactivate_slab(struct kmem_cache *s, struct page *page, + * slabs from diagnostic functions will not see + * any frozen slabs. + */ +- spin_lock(&n->list_lock); ++ raw_spin_lock(&n->list_lock); + } + } + +@@ -2119,7 +2148,7 @@ static void deactivate_slab(struct kmem_cache *s, struct page *page, + goto redo; + + if (lock) +- spin_unlock(&n->list_lock); ++ raw_spin_unlock(&n->list_lock); + + if (m == M_FREE) { + stat(s, DEACTIVATE_EMPTY); +@@ -2151,10 +2180,10 @@ static void unfreeze_partials(struct kmem_cache *s, + n2 = get_node(s, page_to_nid(page)); + if (n != n2) { + if (n) +- spin_unlock(&n->list_lock); ++ raw_spin_unlock(&n->list_lock); + + n = n2; +- spin_lock(&n->list_lock); ++ raw_spin_lock(&n->list_lock); + } + + do { +@@ -2183,7 +2212,7 @@ static void unfreeze_partials(struct kmem_cache *s, + } + + if (n) +- spin_unlock(&n->list_lock); ++ raw_spin_unlock(&n->list_lock); + + while (discard_page) { + page = discard_page; +@@ -2222,14 +2251,21 @@ static void put_cpu_partial(struct kmem_cache *s, struct page *page, int drain) + pobjects = oldpage->pobjects; + pages = oldpage->pages; + if (drain && pobjects > s->cpu_partial) { ++ struct slub_free_list *f; + unsigned long flags; ++ LIST_HEAD(tofree); + /* + * partial array is full. Move the existing + * set to the per node partial list. + */ + local_irq_save(flags); + unfreeze_partials(s, this_cpu_ptr(s->cpu_slab)); ++ f = this_cpu_ptr(&slub_free_list); ++ raw_spin_lock(&f->lock); ++ list_splice_init(&f->list, &tofree); ++ raw_spin_unlock(&f->lock); + local_irq_restore(flags); ++ free_delayed(&tofree); + oldpage = NULL; + pobjects = 0; + pages = 0; +@@ -2301,7 +2337,22 @@ static bool has_cpu_slab(int cpu, void *info) + + static void flush_all(struct kmem_cache *s) + { ++ LIST_HEAD(tofree); ++ int cpu; ++ + on_each_cpu_cond(has_cpu_slab, flush_cpu_slab, s, 1, GFP_ATOMIC); ++ for_each_online_cpu(cpu) { ++ struct slub_free_list *f; ++ ++ if (!has_cpu_slab(cpu, s)) ++ continue; ++ ++ f = &per_cpu(slub_free_list, cpu); ++ raw_spin_lock_irq(&f->lock); ++ list_splice_init(&f->list, &tofree); ++ raw_spin_unlock_irq(&f->lock); ++ free_delayed(&tofree); ++ } + } + + /* +@@ -2337,10 +2388,10 @@ static unsigned long count_partial(struct kmem_cache_node *n, + unsigned long x = 0; + struct page *page; + +- spin_lock_irqsave(&n->list_lock, flags); ++ raw_spin_lock_irqsave(&n->list_lock, flags); + list_for_each_entry(page, &n->partial, lru) + x += get_count(page); +- spin_unlock_irqrestore(&n->list_lock, flags); ++ raw_spin_unlock_irqrestore(&n->list_lock, flags); + return x; + } + #endif /* CONFIG_SLUB_DEBUG || CONFIG_SYSFS */ +@@ -2478,8 +2529,10 @@ static inline void *get_freelist(struct kmem_cache *s, struct page *page) + * already disabled (which is the case for bulk allocation). + */ + static void *___slab_alloc(struct kmem_cache *s, gfp_t gfpflags, int node, +- unsigned long addr, struct kmem_cache_cpu *c) ++ unsigned long addr, struct kmem_cache_cpu *c, ++ struct list_head *to_free) + { ++ struct slub_free_list *f; + void *freelist; + struct page *page; + +@@ -2539,6 +2592,13 @@ static void *___slab_alloc(struct kmem_cache *s, gfp_t gfpflags, int node, + VM_BUG_ON(!c->page->frozen); + c->freelist = get_freepointer(s, freelist); + c->tid = next_tid(c->tid); ++ ++out: ++ f = this_cpu_ptr(&slub_free_list); ++ raw_spin_lock(&f->lock); ++ list_splice_init(&f->list, to_free); ++ raw_spin_unlock(&f->lock); ++ + return freelist; + + new_slab: +@@ -2570,7 +2630,7 @@ static void *___slab_alloc(struct kmem_cache *s, gfp_t gfpflags, int node, + deactivate_slab(s, page, get_freepointer(s, freelist)); + c->page = NULL; + c->freelist = NULL; +- return freelist; ++ goto out; + } + + /* +@@ -2582,6 +2642,7 @@ static void *__slab_alloc(struct kmem_cache *s, gfp_t gfpflags, int node, + { + void *p; + unsigned long flags; ++ LIST_HEAD(tofree); + + local_irq_save(flags); + #ifdef CONFIG_PREEMPT +@@ -2593,8 +2654,9 @@ static void *__slab_alloc(struct kmem_cache *s, gfp_t gfpflags, int node, + c = this_cpu_ptr(s->cpu_slab); + #endif + +- p = ___slab_alloc(s, gfpflags, node, addr, c); ++ p = ___slab_alloc(s, gfpflags, node, addr, c, &tofree); + local_irq_restore(flags); ++ free_delayed(&tofree); + return p; + } + +@@ -2780,7 +2842,7 @@ static void __slab_free(struct kmem_cache *s, struct page *page, + + do { + if (unlikely(n)) { +- spin_unlock_irqrestore(&n->list_lock, flags); ++ raw_spin_unlock_irqrestore(&n->list_lock, flags); + n = NULL; + } + prior = page->freelist; +@@ -2812,7 +2874,7 @@ static void __slab_free(struct kmem_cache *s, struct page *page, + * Otherwise the list_lock will synchronize with + * other processors updating the list of slabs. + */ +- spin_lock_irqsave(&n->list_lock, flags); ++ raw_spin_lock_irqsave(&n->list_lock, flags); + + } + } +@@ -2854,7 +2916,7 @@ static void __slab_free(struct kmem_cache *s, struct page *page, + add_partial(n, page, DEACTIVATE_TO_TAIL); + stat(s, FREE_ADD_PARTIAL); + } +- spin_unlock_irqrestore(&n->list_lock, flags); ++ raw_spin_unlock_irqrestore(&n->list_lock, flags); + return; + + slab_empty: +@@ -2869,7 +2931,7 @@ static void __slab_free(struct kmem_cache *s, struct page *page, + remove_full(s, n, page); + } + +- spin_unlock_irqrestore(&n->list_lock, flags); ++ raw_spin_unlock_irqrestore(&n->list_lock, flags); + stat(s, FREE_SLAB); + discard_slab(s, page); + } +@@ -3074,6 +3136,7 @@ int kmem_cache_alloc_bulk(struct kmem_cache *s, gfp_t flags, size_t size, + void **p) + { + struct kmem_cache_cpu *c; ++ LIST_HEAD(to_free); + int i; + + /* memcg and kmem_cache debug support */ +@@ -3097,7 +3160,7 @@ int kmem_cache_alloc_bulk(struct kmem_cache *s, gfp_t flags, size_t size, + * of re-populating per CPU c->freelist + */ + p[i] = ___slab_alloc(s, flags, NUMA_NO_NODE, +- _RET_IP_, c); ++ _RET_IP_, c, &to_free); + if (unlikely(!p[i])) + goto error; + +@@ -3109,6 +3172,7 @@ int kmem_cache_alloc_bulk(struct kmem_cache *s, gfp_t flags, size_t size, + } + c->tid = next_tid(c->tid); + local_irq_enable(); ++ free_delayed(&to_free); + + /* Clear memory outside IRQ disabled fastpath loop */ + if (unlikely(flags & __GFP_ZERO)) { +@@ -3256,7 +3320,7 @@ static void + init_kmem_cache_node(struct kmem_cache_node *n) + { + n->nr_partial = 0; +- spin_lock_init(&n->list_lock); ++ raw_spin_lock_init(&n->list_lock); + INIT_LIST_HEAD(&n->partial); + #ifdef CONFIG_SLUB_DEBUG + atomic_long_set(&n->nr_slabs, 0); +@@ -3600,6 +3664,10 @@ static void list_slab_objects(struct kmem_cache *s, struct page *page, + const char *text) + { + #ifdef CONFIG_SLUB_DEBUG ++#ifdef CONFIG_PREEMPT_RT_BASE ++ /* XXX move out of irq-off section */ ++ slab_err(s, page, text, s->name); ++#else + void *addr = page_address(page); + void *p; + unsigned long *map = kzalloc(BITS_TO_LONGS(page->objects) * +@@ -3620,6 +3688,7 @@ static void list_slab_objects(struct kmem_cache *s, struct page *page, + slab_unlock(page); + kfree(map); + #endif ++#endif + } + + /* +@@ -3633,7 +3702,7 @@ static void free_partial(struct kmem_cache *s, struct kmem_cache_node *n) + struct page *page, *h; + + BUG_ON(irqs_disabled()); +- spin_lock_irq(&n->list_lock); ++ raw_spin_lock_irq(&n->list_lock); + list_for_each_entry_safe(page, h, &n->partial, lru) { + if (!page->inuse) { + remove_partial(n, page); +@@ -3643,7 +3712,7 @@ static void free_partial(struct kmem_cache *s, struct kmem_cache_node *n) + "Objects remaining in %s on __kmem_cache_shutdown()"); + } + } +- spin_unlock_irq(&n->list_lock); ++ raw_spin_unlock_irq(&n->list_lock); + + list_for_each_entry_safe(page, h, &discard, lru) + discard_slab(s, page); +@@ -3901,7 +3970,7 @@ int __kmem_cache_shrink(struct kmem_cache *s, bool deactivate) + for (i = 0; i < SHRINK_PROMOTE_MAX; i++) + INIT_LIST_HEAD(promote + i); + +- spin_lock_irqsave(&n->list_lock, flags); ++ raw_spin_lock_irqsave(&n->list_lock, flags); + + /* + * Build lists of slabs to discard or promote. +@@ -3932,7 +4001,7 @@ int __kmem_cache_shrink(struct kmem_cache *s, bool deactivate) + for (i = SHRINK_PROMOTE_MAX - 1; i >= 0; i--) + list_splice(promote + i, &n->partial); + +- spin_unlock_irqrestore(&n->list_lock, flags); ++ raw_spin_unlock_irqrestore(&n->list_lock, flags); + + /* Release empty slabs */ + list_for_each_entry_safe(page, t, &discard, lru) +@@ -4108,6 +4177,12 @@ void __init kmem_cache_init(void) + { + static __initdata struct kmem_cache boot_kmem_cache, + boot_kmem_cache_node; ++ int cpu; ++ ++ for_each_possible_cpu(cpu) { ++ raw_spin_lock_init(&per_cpu(slub_free_list, cpu).lock); ++ INIT_LIST_HEAD(&per_cpu(slub_free_list, cpu).list); ++ } + + if (debug_guardpage_minorder()) + slub_max_order = 0; +@@ -4354,7 +4429,7 @@ static int validate_slab_node(struct kmem_cache *s, + struct page *page; + unsigned long flags; + +- spin_lock_irqsave(&n->list_lock, flags); ++ raw_spin_lock_irqsave(&n->list_lock, flags); + + list_for_each_entry(page, &n->partial, lru) { + validate_slab_slab(s, page, map); +@@ -4376,7 +4451,7 @@ static int validate_slab_node(struct kmem_cache *s, + s->name, count, atomic_long_read(&n->nr_slabs)); + + out: +- spin_unlock_irqrestore(&n->list_lock, flags); ++ raw_spin_unlock_irqrestore(&n->list_lock, flags); + return count; + } + +@@ -4564,12 +4639,12 @@ static int list_locations(struct kmem_cache *s, char *buf, + if (!atomic_long_read(&n->nr_slabs)) + continue; + +- spin_lock_irqsave(&n->list_lock, flags); ++ raw_spin_lock_irqsave(&n->list_lock, flags); + list_for_each_entry(page, &n->partial, lru) + process_slab(&t, s, page, alloc, map); + list_for_each_entry(page, &n->full, lru) + process_slab(&t, s, page, alloc, map); +- spin_unlock_irqrestore(&n->list_lock, flags); ++ raw_spin_unlock_irqrestore(&n->list_lock, flags); + } + + for (i = 0; i < t.count; i++) { +diff --git a/mm/swap.c b/mm/swap.c +index 75c63bb2a1da..93fe549eb11e 100644 +--- a/mm/swap.c ++++ b/mm/swap.c +@@ -32,6 +32,7 @@ + #include <linux/memcontrol.h> + #include <linux/gfp.h> + #include <linux/uio.h> ++#include <linux/locallock.h> + #include <linux/hugetlb.h> + #include <linux/page_idle.h> + +@@ -50,6 +51,8 @@ static DEFINE_PER_CPU(struct pagevec, lru_deactivate_pvecs); + #ifdef CONFIG_SMP + static DEFINE_PER_CPU(struct pagevec, activate_page_pvecs); + #endif ++static DEFINE_LOCAL_IRQ_LOCK(rotate_lock); ++DEFINE_LOCAL_IRQ_LOCK(swapvec_lock); + + /* + * This path almost never happens for VM activity - pages are normally +@@ -240,11 +243,11 @@ void rotate_reclaimable_page(struct page *page) + unsigned long flags; + + get_page(page); +- local_irq_save(flags); ++ local_lock_irqsave(rotate_lock, flags); + pvec = this_cpu_ptr(&lru_rotate_pvecs); + if (!pagevec_add(pvec, page) || PageCompound(page)) + pagevec_move_tail(pvec); +- local_irq_restore(flags); ++ local_unlock_irqrestore(rotate_lock, flags); + } + } + +@@ -294,12 +297,13 @@ void activate_page(struct page *page) + { + page = compound_head(page); + if (PageLRU(page) && !PageActive(page) && !PageUnevictable(page)) { +- struct pagevec *pvec = &get_cpu_var(activate_page_pvecs); ++ struct pagevec *pvec = &get_locked_var(swapvec_lock, ++ activate_page_pvecs); + + get_page(page); + if (!pagevec_add(pvec, page) || PageCompound(page)) + pagevec_lru_move_fn(pvec, __activate_page, NULL); +- put_cpu_var(activate_page_pvecs); ++ put_locked_var(swapvec_lock, activate_page_pvecs); + } + } + +@@ -326,7 +330,7 @@ void activate_page(struct page *page) + + static void __lru_cache_activate_page(struct page *page) + { +- struct pagevec *pvec = &get_cpu_var(lru_add_pvec); ++ struct pagevec *pvec = &get_locked_var(swapvec_lock, lru_add_pvec); + int i; + + /* +@@ -348,7 +352,7 @@ static void __lru_cache_activate_page(struct page *page) + } + } + +- put_cpu_var(lru_add_pvec); ++ put_locked_var(swapvec_lock, lru_add_pvec); + } + + /* +@@ -390,12 +394,12 @@ EXPORT_SYMBOL(mark_page_accessed); + + static void __lru_cache_add(struct page *page) + { +- struct pagevec *pvec = &get_cpu_var(lru_add_pvec); ++ struct pagevec *pvec = &get_locked_var(swapvec_lock, lru_add_pvec); + + get_page(page); + if (!pagevec_add(pvec, page) || PageCompound(page)) + __pagevec_lru_add(pvec); +- put_cpu_var(lru_add_pvec); ++ put_locked_var(swapvec_lock, lru_add_pvec); + } + + /** +@@ -593,9 +597,15 @@ void lru_add_drain_cpu(int cpu) + unsigned long flags; + + /* No harm done if a racing interrupt already did this */ +- local_irq_save(flags); ++#ifdef CONFIG_PREEMPT_RT_BASE ++ local_lock_irqsave_on(rotate_lock, flags, cpu); + pagevec_move_tail(pvec); +- local_irq_restore(flags); ++ local_unlock_irqrestore_on(rotate_lock, flags, cpu); ++#else ++ local_lock_irqsave(rotate_lock, flags); ++ pagevec_move_tail(pvec); ++ local_unlock_irqrestore(rotate_lock, flags); ++#endif + } + + pvec = &per_cpu(lru_deactivate_file_pvecs, cpu); +@@ -627,11 +637,12 @@ void deactivate_file_page(struct page *page) + return; + + if (likely(get_page_unless_zero(page))) { +- struct pagevec *pvec = &get_cpu_var(lru_deactivate_file_pvecs); ++ struct pagevec *pvec = &get_locked_var(swapvec_lock, ++ lru_deactivate_file_pvecs); + + if (!pagevec_add(pvec, page) || PageCompound(page)) + pagevec_lru_move_fn(pvec, lru_deactivate_file_fn, NULL); +- put_cpu_var(lru_deactivate_file_pvecs); ++ put_locked_var(swapvec_lock, lru_deactivate_file_pvecs); + } + } + +@@ -646,27 +657,31 @@ void deactivate_file_page(struct page *page) + void deactivate_page(struct page *page) + { + if (PageLRU(page) && PageActive(page) && !PageUnevictable(page)) { +- struct pagevec *pvec = &get_cpu_var(lru_deactivate_pvecs); ++ struct pagevec *pvec = &get_locked_var(swapvec_lock, ++ lru_deactivate_pvecs); + + get_page(page); + if (!pagevec_add(pvec, page) || PageCompound(page)) + pagevec_lru_move_fn(pvec, lru_deactivate_fn, NULL); +- put_cpu_var(lru_deactivate_pvecs); ++ put_locked_var(swapvec_lock, lru_deactivate_pvecs); + } + } + + void lru_add_drain(void) + { +- lru_add_drain_cpu(get_cpu()); +- put_cpu(); ++ lru_add_drain_cpu(local_lock_cpu(swapvec_lock)); ++ local_unlock_cpu(swapvec_lock); + } + +-static void lru_add_drain_per_cpu(struct work_struct *dummy) ++#ifdef CONFIG_PREEMPT_RT_BASE ++static inline void remote_lru_add_drain(int cpu, struct cpumask *has_work) + { +- lru_add_drain(); ++ local_lock_on(swapvec_lock, cpu); ++ lru_add_drain_cpu(cpu); ++ local_unlock_on(swapvec_lock, cpu); + } + +-static DEFINE_PER_CPU(struct work_struct, lru_add_drain_work); ++#else + + /* + * lru_add_drain_wq is used to do lru_add_drain_all() from a WQ_MEM_RECLAIM +@@ -686,6 +701,22 @@ static int __init lru_init(void) + } + early_initcall(lru_init); + ++static void lru_add_drain_per_cpu(struct work_struct *dummy) ++{ ++ lru_add_drain(); ++} ++ ++static DEFINE_PER_CPU(struct work_struct, lru_add_drain_work); ++static inline void remote_lru_add_drain(int cpu, struct cpumask *has_work) ++{ ++ struct work_struct *work = &per_cpu(lru_add_drain_work, cpu); ++ ++ INIT_WORK(work, lru_add_drain_per_cpu); ++ queue_work_on(cpu, lru_add_drain_wq, work); ++ cpumask_set_cpu(cpu, has_work); ++} ++#endif ++ + void lru_add_drain_all(void) + { + static DEFINE_MUTEX(lock); +@@ -697,21 +728,18 @@ void lru_add_drain_all(void) + cpumask_clear(&has_work); + + for_each_online_cpu(cpu) { +- struct work_struct *work = &per_cpu(lru_add_drain_work, cpu); +- + if (pagevec_count(&per_cpu(lru_add_pvec, cpu)) || + pagevec_count(&per_cpu(lru_rotate_pvecs, cpu)) || + pagevec_count(&per_cpu(lru_deactivate_file_pvecs, cpu)) || + pagevec_count(&per_cpu(lru_deactivate_pvecs, cpu)) || +- need_activate_page_drain(cpu)) { +- INIT_WORK(work, lru_add_drain_per_cpu); +- queue_work_on(cpu, lru_add_drain_wq, work); +- cpumask_set_cpu(cpu, &has_work); +- } ++ need_activate_page_drain(cpu)) ++ remote_lru_add_drain(cpu, &has_work); + } + ++#ifndef CONFIG_PREEMPT_RT_BASE + for_each_cpu(cpu, &has_work) + flush_work(&per_cpu(lru_add_drain_work, cpu)); ++#endif + + put_online_cpus(); + mutex_unlock(&lock); +diff --git a/mm/truncate.c b/mm/truncate.c +index a01cce450a26..4bda37604f99 100644 +--- a/mm/truncate.c ++++ b/mm/truncate.c +@@ -62,9 +62,12 @@ static void clear_exceptional_entry(struct address_space *mapping, + * protected by mapping->tree_lock. + */ + if (!workingset_node_shadows(node) && +- !list_empty(&node->private_list)) +- list_lru_del(&workingset_shadow_nodes, ++ !list_empty(&node->private_list)) { ++ local_lock(workingset_shadow_lock); ++ list_lru_del(&__workingset_shadow_nodes, + &node->private_list); ++ local_unlock(workingset_shadow_lock); ++ } + __radix_tree_delete_node(&mapping->page_tree, node); + unlock: + spin_unlock_irq(&mapping->tree_lock); +diff --git a/mm/vmalloc.c b/mm/vmalloc.c +index 91f44e78c516..06ec393bb97d 100644 +--- a/mm/vmalloc.c ++++ b/mm/vmalloc.c +@@ -845,7 +845,7 @@ static void *new_vmap_block(unsigned int order, gfp_t gfp_mask) + struct vmap_block *vb; + struct vmap_area *va; + unsigned long vb_idx; +- int node, err; ++ int node, err, cpu; + void *vaddr; + + node = numa_node_id(); +@@ -888,11 +888,12 @@ static void *new_vmap_block(unsigned int order, gfp_t gfp_mask) + BUG_ON(err); + radix_tree_preload_end(); + +- vbq = &get_cpu_var(vmap_block_queue); ++ cpu = get_cpu_light(); ++ vbq = this_cpu_ptr(&vmap_block_queue); + spin_lock(&vbq->lock); + list_add_tail_rcu(&vb->free_list, &vbq->free); + spin_unlock(&vbq->lock); +- put_cpu_var(vmap_block_queue); ++ put_cpu_light(); + + return vaddr; + } +@@ -961,6 +962,7 @@ static void *vb_alloc(unsigned long size, gfp_t gfp_mask) + struct vmap_block *vb; + void *vaddr = NULL; + unsigned int order; ++ int cpu; + + BUG_ON(offset_in_page(size)); + BUG_ON(size > PAGE_SIZE*VMAP_MAX_ALLOC); +@@ -975,7 +977,8 @@ static void *vb_alloc(unsigned long size, gfp_t gfp_mask) + order = get_order(size); + + rcu_read_lock(); +- vbq = &get_cpu_var(vmap_block_queue); ++ cpu = get_cpu_light(); ++ vbq = this_cpu_ptr(&vmap_block_queue); + list_for_each_entry_rcu(vb, &vbq->free, free_list) { + unsigned long pages_off; + +@@ -998,7 +1001,7 @@ static void *vb_alloc(unsigned long size, gfp_t gfp_mask) + break; + } + +- put_cpu_var(vmap_block_queue); ++ put_cpu_light(); + rcu_read_unlock(); + + /* Allocate new block if nothing was found */ +diff --git a/mm/vmstat.c b/mm/vmstat.c +index 89cec42d19ff..fb73631fb90b 100644 +--- a/mm/vmstat.c ++++ b/mm/vmstat.c +@@ -245,6 +245,7 @@ void __mod_zone_page_state(struct zone *zone, enum zone_stat_item item, + long x; + long t; + ++ preempt_disable_rt(); + x = delta + __this_cpu_read(*p); + + t = __this_cpu_read(pcp->stat_threshold); +@@ -254,6 +255,7 @@ void __mod_zone_page_state(struct zone *zone, enum zone_stat_item item, + x = 0; + } + __this_cpu_write(*p, x); ++ preempt_enable_rt(); + } + EXPORT_SYMBOL(__mod_zone_page_state); + +@@ -265,6 +267,7 @@ void __mod_node_page_state(struct pglist_data *pgdat, enum node_stat_item item, + long x; + long t; + ++ preempt_disable_rt(); + x = delta + __this_cpu_read(*p); + + t = __this_cpu_read(pcp->stat_threshold); +@@ -274,6 +277,7 @@ void __mod_node_page_state(struct pglist_data *pgdat, enum node_stat_item item, + x = 0; + } + __this_cpu_write(*p, x); ++ preempt_enable_rt(); + } + EXPORT_SYMBOL(__mod_node_page_state); + +@@ -306,6 +310,7 @@ void __inc_zone_state(struct zone *zone, enum zone_stat_item item) + s8 __percpu *p = pcp->vm_stat_diff + item; + s8 v, t; + ++ preempt_disable_rt(); + v = __this_cpu_inc_return(*p); + t = __this_cpu_read(pcp->stat_threshold); + if (unlikely(v > t)) { +@@ -314,6 +319,7 @@ void __inc_zone_state(struct zone *zone, enum zone_stat_item item) + zone_page_state_add(v + overstep, zone, item); + __this_cpu_write(*p, -overstep); + } ++ preempt_enable_rt(); + } + + void __inc_node_state(struct pglist_data *pgdat, enum node_stat_item item) +@@ -322,6 +328,7 @@ void __inc_node_state(struct pglist_data *pgdat, enum node_stat_item item) + s8 __percpu *p = pcp->vm_node_stat_diff + item; + s8 v, t; + ++ preempt_disable_rt(); + v = __this_cpu_inc_return(*p); + t = __this_cpu_read(pcp->stat_threshold); + if (unlikely(v > t)) { +@@ -330,6 +337,7 @@ void __inc_node_state(struct pglist_data *pgdat, enum node_stat_item item) + node_page_state_add(v + overstep, pgdat, item); + __this_cpu_write(*p, -overstep); + } ++ preempt_enable_rt(); + } + + void __inc_zone_page_state(struct page *page, enum zone_stat_item item) +@@ -350,6 +358,7 @@ void __dec_zone_state(struct zone *zone, enum zone_stat_item item) + s8 __percpu *p = pcp->vm_stat_diff + item; + s8 v, t; + ++ preempt_disable_rt(); + v = __this_cpu_dec_return(*p); + t = __this_cpu_read(pcp->stat_threshold); + if (unlikely(v < - t)) { +@@ -358,6 +367,7 @@ void __dec_zone_state(struct zone *zone, enum zone_stat_item item) + zone_page_state_add(v - overstep, zone, item); + __this_cpu_write(*p, overstep); + } ++ preempt_enable_rt(); + } + + void __dec_node_state(struct pglist_data *pgdat, enum node_stat_item item) +@@ -366,6 +376,7 @@ void __dec_node_state(struct pglist_data *pgdat, enum node_stat_item item) + s8 __percpu *p = pcp->vm_node_stat_diff + item; + s8 v, t; + ++ preempt_disable_rt(); + v = __this_cpu_dec_return(*p); + t = __this_cpu_read(pcp->stat_threshold); + if (unlikely(v < - t)) { +@@ -374,6 +385,7 @@ void __dec_node_state(struct pglist_data *pgdat, enum node_stat_item item) + node_page_state_add(v - overstep, pgdat, item); + __this_cpu_write(*p, overstep); + } ++ preempt_enable_rt(); + } + + void __dec_zone_page_state(struct page *page, enum zone_stat_item item) +diff --git a/mm/workingset.c b/mm/workingset.c +index 617475f529f4..48674bf36fb1 100644 +--- a/mm/workingset.c ++++ b/mm/workingset.c +@@ -334,7 +334,8 @@ void workingset_activation(struct page *page) + * point where they would still be useful. + */ + +-struct list_lru workingset_shadow_nodes; ++struct list_lru __workingset_shadow_nodes; ++DEFINE_LOCAL_IRQ_LOCK(workingset_shadow_lock); + + static unsigned long count_shadow_nodes(struct shrinker *shrinker, + struct shrink_control *sc) +@@ -344,9 +345,9 @@ static unsigned long count_shadow_nodes(struct shrinker *shrinker, + unsigned long pages; + + /* list_lru lock nests inside IRQ-safe mapping->tree_lock */ +- local_irq_disable(); +- shadow_nodes = list_lru_shrink_count(&workingset_shadow_nodes, sc); +- local_irq_enable(); ++ local_lock_irq(workingset_shadow_lock); ++ shadow_nodes = list_lru_shrink_count(&__workingset_shadow_nodes, sc); ++ local_unlock_irq(workingset_shadow_lock); + + if (memcg_kmem_enabled()) { + pages = mem_cgroup_node_nr_lru_pages(sc->memcg, sc->nid, +@@ -438,9 +439,9 @@ static enum lru_status shadow_lru_isolate(struct list_head *item, + spin_unlock(&mapping->tree_lock); + ret = LRU_REMOVED_RETRY; + out: +- local_irq_enable(); ++ local_unlock_irq(workingset_shadow_lock); + cond_resched(); +- local_irq_disable(); ++ local_lock_irq(workingset_shadow_lock); + spin_lock(lru_lock); + return ret; + } +@@ -451,10 +452,10 @@ static unsigned long scan_shadow_nodes(struct shrinker *shrinker, + unsigned long ret; + + /* list_lru lock nests inside IRQ-safe mapping->tree_lock */ +- local_irq_disable(); +- ret = list_lru_shrink_walk(&workingset_shadow_nodes, sc, ++ local_lock_irq(workingset_shadow_lock); ++ ret = list_lru_shrink_walk(&__workingset_shadow_nodes, sc, + shadow_lru_isolate, NULL); +- local_irq_enable(); ++ local_unlock_irq(workingset_shadow_lock); + return ret; + } + +@@ -492,7 +493,7 @@ static int __init workingset_init(void) + pr_info("workingset: timestamp_bits=%d max_order=%d bucket_order=%u\n", + timestamp_bits, max_order, bucket_order); + +- ret = list_lru_init_key(&workingset_shadow_nodes, &shadow_nodes_key); ++ ret = list_lru_init_key(&__workingset_shadow_nodes, &shadow_nodes_key); + if (ret) + goto err; + ret = register_shrinker(&workingset_shadow_shrinker); +@@ -500,7 +501,7 @@ static int __init workingset_init(void) + goto err_list_lru; + return 0; + err_list_lru: +- list_lru_destroy(&workingset_shadow_nodes); ++ list_lru_destroy(&__workingset_shadow_nodes); + err: + return ret; + } +diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c +index b0bc023d25c5..5af6426fbcbe 100644 +--- a/mm/zsmalloc.c ++++ b/mm/zsmalloc.c +@@ -53,6 +53,7 @@ + #include <linux/mount.h> + #include <linux/migrate.h> + #include <linux/pagemap.h> ++#include <linux/locallock.h> + + #define ZSPAGE_MAGIC 0x58 + +@@ -70,9 +71,22 @@ + */ + #define ZS_MAX_ZSPAGE_ORDER 2 + #define ZS_MAX_PAGES_PER_ZSPAGE (_AC(1, UL) << ZS_MAX_ZSPAGE_ORDER) +- + #define ZS_HANDLE_SIZE (sizeof(unsigned long)) + ++#ifdef CONFIG_PREEMPT_RT_FULL ++ ++struct zsmalloc_handle { ++ unsigned long addr; ++ struct mutex lock; ++}; ++ ++#define ZS_HANDLE_ALLOC_SIZE (sizeof(struct zsmalloc_handle)) ++ ++#else ++ ++#define ZS_HANDLE_ALLOC_SIZE (sizeof(unsigned long)) ++#endif ++ + /* + * Object location (<PFN>, <obj_idx>) is encoded as + * as single (unsigned long) handle value. +@@ -327,7 +341,7 @@ static void SetZsPageMovable(struct zs_pool *pool, struct zspage *zspage) {} + + static int create_cache(struct zs_pool *pool) + { +- pool->handle_cachep = kmem_cache_create("zs_handle", ZS_HANDLE_SIZE, ++ pool->handle_cachep = kmem_cache_create("zs_handle", ZS_HANDLE_ALLOC_SIZE, + 0, 0, NULL); + if (!pool->handle_cachep) + return 1; +@@ -351,10 +365,27 @@ static void destroy_cache(struct zs_pool *pool) + + static unsigned long cache_alloc_handle(struct zs_pool *pool, gfp_t gfp) + { +- return (unsigned long)kmem_cache_alloc(pool->handle_cachep, +- gfp & ~(__GFP_HIGHMEM|__GFP_MOVABLE)); ++ void *p; ++ ++ p = kmem_cache_alloc(pool->handle_cachep, ++ gfp & ~(__GFP_HIGHMEM|__GFP_MOVABLE)); ++#ifdef CONFIG_PREEMPT_RT_FULL ++ if (p) { ++ struct zsmalloc_handle *zh = p; ++ ++ mutex_init(&zh->lock); ++ } ++#endif ++ return (unsigned long)p; + } + ++#ifdef CONFIG_PREEMPT_RT_FULL ++static struct zsmalloc_handle *zs_get_pure_handle(unsigned long handle) ++{ ++ return (void *)(handle &~((1 << OBJ_TAG_BITS) - 1)); ++} ++#endif ++ + static void cache_free_handle(struct zs_pool *pool, unsigned long handle) + { + kmem_cache_free(pool->handle_cachep, (void *)handle); +@@ -373,12 +404,18 @@ static void cache_free_zspage(struct zs_pool *pool, struct zspage *zspage) + + static void record_obj(unsigned long handle, unsigned long obj) + { ++#ifdef CONFIG_PREEMPT_RT_FULL ++ struct zsmalloc_handle *zh = zs_get_pure_handle(handle); ++ ++ WRITE_ONCE(zh->addr, obj); ++#else + /* + * lsb of @obj represents handle lock while other bits + * represent object value the handle is pointing so + * updating shouldn't do store tearing. + */ + WRITE_ONCE(*(unsigned long *)handle, obj); ++#endif + } + + /* zpool driver */ +@@ -467,6 +504,7 @@ MODULE_ALIAS("zpool-zsmalloc"); + + /* per-cpu VM mapping areas for zspage accesses that cross page boundaries */ + static DEFINE_PER_CPU(struct mapping_area, zs_map_area); ++static DEFINE_LOCAL_IRQ_LOCK(zs_map_area_lock); + + static bool is_zspage_isolated(struct zspage *zspage) + { +@@ -902,7 +940,13 @@ static unsigned long location_to_obj(struct page *page, unsigned int obj_idx) + + static unsigned long handle_to_obj(unsigned long handle) + { ++#ifdef CONFIG_PREEMPT_RT_FULL ++ struct zsmalloc_handle *zh = zs_get_pure_handle(handle); ++ ++ return zh->addr; ++#else + return *(unsigned long *)handle; ++#endif + } + + static unsigned long obj_to_head(struct page *page, void *obj) +@@ -916,22 +960,46 @@ static unsigned long obj_to_head(struct page *page, void *obj) + + static inline int testpin_tag(unsigned long handle) + { ++#ifdef CONFIG_PREEMPT_RT_FULL ++ struct zsmalloc_handle *zh = zs_get_pure_handle(handle); ++ ++ return mutex_is_locked(&zh->lock); ++#else + return bit_spin_is_locked(HANDLE_PIN_BIT, (unsigned long *)handle); ++#endif + } + + static inline int trypin_tag(unsigned long handle) + { ++#ifdef CONFIG_PREEMPT_RT_FULL ++ struct zsmalloc_handle *zh = zs_get_pure_handle(handle); ++ ++ return mutex_trylock(&zh->lock); ++#else + return bit_spin_trylock(HANDLE_PIN_BIT, (unsigned long *)handle); ++#endif + } + + static void pin_tag(unsigned long handle) + { ++#ifdef CONFIG_PREEMPT_RT_FULL ++ struct zsmalloc_handle *zh = zs_get_pure_handle(handle); ++ ++ return mutex_lock(&zh->lock); ++#else + bit_spin_lock(HANDLE_PIN_BIT, (unsigned long *)handle); ++#endif + } + + static void unpin_tag(unsigned long handle) + { ++#ifdef CONFIG_PREEMPT_RT_FULL ++ struct zsmalloc_handle *zh = zs_get_pure_handle(handle); ++ ++ return mutex_unlock(&zh->lock); ++#else + bit_spin_unlock(HANDLE_PIN_BIT, (unsigned long *)handle); ++#endif + } + + static void reset_page(struct page *page) +@@ -1423,7 +1491,7 @@ void *zs_map_object(struct zs_pool *pool, unsigned long handle, + class = pool->size_class[class_idx]; + off = (class->size * obj_idx) & ~PAGE_MASK; + +- area = &get_cpu_var(zs_map_area); ++ area = &get_locked_var(zs_map_area_lock, zs_map_area); + area->vm_mm = mm; + if (off + class->size <= PAGE_SIZE) { + /* this object is contained entirely within a page */ +@@ -1477,7 +1545,7 @@ void zs_unmap_object(struct zs_pool *pool, unsigned long handle) + + __zs_unmap_object(area, pages, off, class->size); + } +- put_cpu_var(zs_map_area); ++ put_locked_var(zs_map_area_lock, zs_map_area); + + migrate_read_unlock(zspage); + unpin_tag(handle); +diff --git a/net/core/dev.c b/net/core/dev.c +index ea6312057a71..d114a4692cde 100644 +--- a/net/core/dev.c ++++ b/net/core/dev.c +@@ -190,6 +190,7 @@ static unsigned int napi_gen_id = NR_CPUS; + static DEFINE_READ_MOSTLY_HASHTABLE(napi_hash, 8); + + static seqcount_t devnet_rename_seq; ++static DEFINE_MUTEX(devnet_rename_mutex); + + static inline void dev_base_seq_inc(struct net *net) + { +@@ -211,14 +212,14 @@ static inline struct hlist_head *dev_index_hash(struct net *net, int ifindex) + static inline void rps_lock(struct softnet_data *sd) + { + #ifdef CONFIG_RPS +- spin_lock(&sd->input_pkt_queue.lock); ++ raw_spin_lock(&sd->input_pkt_queue.raw_lock); + #endif + } + + static inline void rps_unlock(struct softnet_data *sd) + { + #ifdef CONFIG_RPS +- spin_unlock(&sd->input_pkt_queue.lock); ++ raw_spin_unlock(&sd->input_pkt_queue.raw_lock); + #endif + } + +@@ -888,7 +889,8 @@ int netdev_get_name(struct net *net, char *name, int ifindex) + strcpy(name, dev->name); + rcu_read_unlock(); + if (read_seqcount_retry(&devnet_rename_seq, seq)) { +- cond_resched(); ++ mutex_lock(&devnet_rename_mutex); ++ mutex_unlock(&devnet_rename_mutex); + goto retry; + } + +@@ -1157,20 +1159,17 @@ int dev_change_name(struct net_device *dev, const char *newname) + if (dev->flags & IFF_UP) + return -EBUSY; + +- write_seqcount_begin(&devnet_rename_seq); ++ mutex_lock(&devnet_rename_mutex); ++ __raw_write_seqcount_begin(&devnet_rename_seq); + +- if (strncmp(newname, dev->name, IFNAMSIZ) == 0) { +- write_seqcount_end(&devnet_rename_seq); +- return 0; +- } ++ if (strncmp(newname, dev->name, IFNAMSIZ) == 0) ++ goto outunlock; + + memcpy(oldname, dev->name, IFNAMSIZ); + + err = dev_get_valid_name(net, dev, newname); +- if (err < 0) { +- write_seqcount_end(&devnet_rename_seq); +- return err; +- } ++ if (err < 0) ++ goto outunlock; + + if (oldname[0] && !strchr(oldname, '%')) + netdev_info(dev, "renamed from %s\n", oldname); +@@ -1183,11 +1182,12 @@ int dev_change_name(struct net_device *dev, const char *newname) + if (ret) { + memcpy(dev->name, oldname, IFNAMSIZ); + dev->name_assign_type = old_assign_type; +- write_seqcount_end(&devnet_rename_seq); +- return ret; ++ err = ret; ++ goto outunlock; + } + +- write_seqcount_end(&devnet_rename_seq); ++ __raw_write_seqcount_end(&devnet_rename_seq); ++ mutex_unlock(&devnet_rename_mutex); + + netdev_adjacent_rename_links(dev, oldname); + +@@ -1208,7 +1208,8 @@ int dev_change_name(struct net_device *dev, const char *newname) + /* err >= 0 after dev_alloc_name() or stores the first errno */ + if (err >= 0) { + err = ret; +- write_seqcount_begin(&devnet_rename_seq); ++ mutex_lock(&devnet_rename_mutex); ++ __raw_write_seqcount_begin(&devnet_rename_seq); + memcpy(dev->name, oldname, IFNAMSIZ); + memcpy(oldname, newname, IFNAMSIZ); + dev->name_assign_type = old_assign_type; +@@ -1221,6 +1222,11 @@ int dev_change_name(struct net_device *dev, const char *newname) + } + + return err; ++ ++outunlock: ++ __raw_write_seqcount_end(&devnet_rename_seq); ++ mutex_unlock(&devnet_rename_mutex); ++ return err; + } + + /** +@@ -2268,6 +2274,7 @@ static void __netif_reschedule(struct Qdisc *q) + sd->output_queue_tailp = &q->next_sched; + raise_softirq_irqoff(NET_TX_SOFTIRQ); + local_irq_restore(flags); ++ preempt_check_resched_rt(); + } + + void __netif_schedule(struct Qdisc *q) +@@ -2349,6 +2356,7 @@ void __dev_kfree_skb_irq(struct sk_buff *skb, enum skb_free_reason reason) + __this_cpu_write(softnet_data.completion_queue, skb); + raise_softirq_irqoff(NET_TX_SOFTIRQ); + local_irq_restore(flags); ++ preempt_check_resched_rt(); + } + EXPORT_SYMBOL(__dev_kfree_skb_irq); + +@@ -3082,7 +3090,11 @@ static inline int __dev_xmit_skb(struct sk_buff *skb, struct Qdisc *q, + * This permits qdisc->running owner to get the lock more + * often and dequeue packets faster. + */ ++#ifdef CONFIG_PREEMPT_RT_FULL ++ contended = true; ++#else + contended = qdisc_is_running(q); ++#endif + if (unlikely(contended)) + spin_lock(&q->busylock); + +@@ -3145,8 +3157,10 @@ static void skb_update_prio(struct sk_buff *skb) + #define skb_update_prio(skb) + #endif + ++#ifndef CONFIG_PREEMPT_RT_FULL + DEFINE_PER_CPU(int, xmit_recursion); + EXPORT_SYMBOL(xmit_recursion); ++#endif + + /** + * dev_loopback_xmit - loop back @skb +@@ -3390,8 +3404,7 @@ static int __dev_queue_xmit(struct sk_buff *skb, void *accel_priv) + int cpu = smp_processor_id(); /* ok because BHs are off */ + + if (txq->xmit_lock_owner != cpu) { +- if (unlikely(__this_cpu_read(xmit_recursion) > +- XMIT_RECURSION_LIMIT)) ++ if (unlikely(xmit_rec_read() > XMIT_RECURSION_LIMIT)) + goto recursion_alert; + + skb = validate_xmit_skb(skb, dev); +@@ -3401,9 +3414,9 @@ static int __dev_queue_xmit(struct sk_buff *skb, void *accel_priv) + HARD_TX_LOCK(dev, txq, cpu); + + if (!netif_xmit_stopped(txq)) { +- __this_cpu_inc(xmit_recursion); ++ xmit_rec_inc(); + skb = dev_hard_start_xmit(skb, dev, txq, &rc); +- __this_cpu_dec(xmit_recursion); ++ xmit_rec_dec(); + if (dev_xmit_complete(rc)) { + HARD_TX_UNLOCK(dev, txq); + goto out; +@@ -3777,6 +3790,7 @@ static int enqueue_to_backlog(struct sk_buff *skb, int cpu, + rps_unlock(sd); + + local_irq_restore(flags); ++ preempt_check_resched_rt(); + + atomic_long_inc(&skb->dev->rx_dropped); + kfree_skb(skb); +@@ -3795,7 +3809,7 @@ static int netif_rx_internal(struct sk_buff *skb) + struct rps_dev_flow voidflow, *rflow = &voidflow; + int cpu; + +- preempt_disable(); ++ migrate_disable(); + rcu_read_lock(); + + cpu = get_rps_cpu(skb->dev, skb, &rflow); +@@ -3805,13 +3819,13 @@ static int netif_rx_internal(struct sk_buff *skb) + ret = enqueue_to_backlog(skb, cpu, &rflow->last_qtail); + + rcu_read_unlock(); +- preempt_enable(); ++ migrate_enable(); + } else + #endif + { + unsigned int qtail; +- ret = enqueue_to_backlog(skb, get_cpu(), &qtail); +- put_cpu(); ++ ret = enqueue_to_backlog(skb, get_cpu_light(), &qtail); ++ put_cpu_light(); + } + return ret; + } +@@ -3845,11 +3859,9 @@ int netif_rx_ni(struct sk_buff *skb) + + trace_netif_rx_ni_entry(skb); + +- preempt_disable(); ++ local_bh_disable(); + err = netif_rx_internal(skb); +- if (local_softirq_pending()) +- do_softirq(); +- preempt_enable(); ++ local_bh_enable(); + + return err; + } +@@ -4321,7 +4333,7 @@ static void flush_backlog(void *arg) + skb_queue_walk_safe(&sd->input_pkt_queue, skb, tmp) { + if (skb->dev == dev) { + __skb_unlink(skb, &sd->input_pkt_queue); +- kfree_skb(skb); ++ __skb_queue_tail(&sd->tofree_queue, skb); + input_queue_head_incr(sd); + } + } +@@ -4330,10 +4342,13 @@ static void flush_backlog(void *arg) + skb_queue_walk_safe(&sd->process_queue, skb, tmp) { + if (skb->dev == dev) { + __skb_unlink(skb, &sd->process_queue); +- kfree_skb(skb); ++ __skb_queue_tail(&sd->tofree_queue, skb); + input_queue_head_incr(sd); + } + } ++ ++ if (!skb_queue_empty(&sd->tofree_queue)) ++ raise_softirq_irqoff(NET_RX_SOFTIRQ); + } + + static int napi_gro_complete(struct sk_buff *skb) +@@ -4795,6 +4810,7 @@ static void net_rps_action_and_irq_enable(struct softnet_data *sd) + sd->rps_ipi_list = NULL; + + local_irq_enable(); ++ preempt_check_resched_rt(); + + /* Send pending IPI's to kick RPS processing on remote cpus. */ + while (remsd) { +@@ -4808,6 +4824,7 @@ static void net_rps_action_and_irq_enable(struct softnet_data *sd) + } else + #endif + local_irq_enable(); ++ preempt_check_resched_rt(); + } + + static bool sd_has_rps_ipi_waiting(struct softnet_data *sd) +@@ -4889,6 +4906,7 @@ void __napi_schedule(struct napi_struct *n) + local_irq_save(flags); + ____napi_schedule(this_cpu_ptr(&softnet_data), n); + local_irq_restore(flags); ++ preempt_check_resched_rt(); + } + EXPORT_SYMBOL(__napi_schedule); + +@@ -5229,7 +5247,7 @@ static void net_rx_action(struct softirq_action *h) + list_splice_tail(&repoll, &list); + list_splice(&list, &sd->poll_list); + if (!list_empty(&sd->poll_list)) +- __raise_softirq_irqoff(NET_RX_SOFTIRQ); ++ __raise_softirq_irqoff_ksoft(NET_RX_SOFTIRQ); + + net_rps_action_and_irq_enable(sd); + } +@@ -7736,7 +7754,7 @@ EXPORT_SYMBOL(free_netdev); + void synchronize_net(void) + { + might_sleep(); +- if (rtnl_is_locked()) ++ if (rtnl_is_locked() && !IS_ENABLED(CONFIG_PREEMPT_RT_FULL)) + synchronize_rcu_expedited(); + else + synchronize_rcu(); +@@ -7977,16 +7995,20 @@ static int dev_cpu_callback(struct notifier_block *nfb, + + raise_softirq_irqoff(NET_TX_SOFTIRQ); + local_irq_enable(); ++ preempt_check_resched_rt(); + + /* Process offline CPU's input_pkt_queue */ + while ((skb = __skb_dequeue(&oldsd->process_queue))) { + netif_rx_ni(skb); + input_queue_head_incr(oldsd); + } +- while ((skb = skb_dequeue(&oldsd->input_pkt_queue))) { ++ while ((skb = __skb_dequeue(&oldsd->input_pkt_queue))) { + netif_rx_ni(skb); + input_queue_head_incr(oldsd); + } ++ while ((skb = __skb_dequeue(&oldsd->tofree_queue))) { ++ kfree_skb(skb); ++ } + + return NOTIFY_OK; + } +@@ -8288,8 +8310,9 @@ static int __init net_dev_init(void) + for_each_possible_cpu(i) { + struct softnet_data *sd = &per_cpu(softnet_data, i); + +- skb_queue_head_init(&sd->input_pkt_queue); +- skb_queue_head_init(&sd->process_queue); ++ skb_queue_head_init_raw(&sd->input_pkt_queue); ++ skb_queue_head_init_raw(&sd->process_queue); ++ skb_queue_head_init_raw(&sd->tofree_queue); + INIT_LIST_HEAD(&sd->poll_list); + sd->output_queue_tailp = &sd->output_queue; + #ifdef CONFIG_RPS +diff --git a/net/core/filter.c b/net/core/filter.c +index cb06aceb512a..3585a8982287 100644 +--- a/net/core/filter.c ++++ b/net/core/filter.c +@@ -1592,7 +1592,7 @@ static inline int __bpf_tx_skb(struct net_device *dev, struct sk_buff *skb) + { + int ret; + +- if (unlikely(__this_cpu_read(xmit_recursion) > XMIT_RECURSION_LIMIT)) { ++ if (unlikely(xmit_rec_read() > XMIT_RECURSION_LIMIT)) { + net_crit_ratelimited("bpf: recursion limit reached on datapath, buggy bpf program?\n"); + kfree_skb(skb); + return -ENETDOWN; +@@ -1600,9 +1600,9 @@ static inline int __bpf_tx_skb(struct net_device *dev, struct sk_buff *skb) + + skb->dev = dev; + +- __this_cpu_inc(xmit_recursion); ++ xmit_rec_inc(); + ret = dev_queue_xmit(skb); +- __this_cpu_dec(xmit_recursion); ++ xmit_rec_dec(); + + return ret; + } +diff --git a/net/core/gen_estimator.c b/net/core/gen_estimator.c +index cad8e791f28e..2a9364fe62a5 100644 +--- a/net/core/gen_estimator.c ++++ b/net/core/gen_estimator.c +@@ -84,7 +84,7 @@ struct gen_estimator + struct gnet_stats_basic_packed *bstats; + struct gnet_stats_rate_est64 *rate_est; + spinlock_t *stats_lock; +- seqcount_t *running; ++ net_seqlock_t *running; + int ewma_log; + u32 last_packets; + unsigned long avpps; +@@ -213,7 +213,7 @@ int gen_new_estimator(struct gnet_stats_basic_packed *bstats, + struct gnet_stats_basic_cpu __percpu *cpu_bstats, + struct gnet_stats_rate_est64 *rate_est, + spinlock_t *stats_lock, +- seqcount_t *running, ++ net_seqlock_t *running, + struct nlattr *opt) + { + struct gen_estimator *est; +@@ -309,7 +309,7 @@ int gen_replace_estimator(struct gnet_stats_basic_packed *bstats, + struct gnet_stats_basic_cpu __percpu *cpu_bstats, + struct gnet_stats_rate_est64 *rate_est, + spinlock_t *stats_lock, +- seqcount_t *running, struct nlattr *opt) ++ net_seqlock_t *running, struct nlattr *opt) + { + gen_kill_estimator(bstats, rate_est); + return gen_new_estimator(bstats, cpu_bstats, rate_est, stats_lock, running, opt); +diff --git a/net/core/gen_stats.c b/net/core/gen_stats.c +index 508e051304fb..bc3b17b78c94 100644 +--- a/net/core/gen_stats.c ++++ b/net/core/gen_stats.c +@@ -130,7 +130,7 @@ __gnet_stats_copy_basic_cpu(struct gnet_stats_basic_packed *bstats, + } + + void +-__gnet_stats_copy_basic(const seqcount_t *running, ++__gnet_stats_copy_basic(net_seqlock_t *running, + struct gnet_stats_basic_packed *bstats, + struct gnet_stats_basic_cpu __percpu *cpu, + struct gnet_stats_basic_packed *b) +@@ -143,10 +143,10 @@ __gnet_stats_copy_basic(const seqcount_t *running, + } + do { + if (running) +- seq = read_seqcount_begin(running); ++ seq = net_seq_begin(running); + bstats->bytes = b->bytes; + bstats->packets = b->packets; +- } while (running && read_seqcount_retry(running, seq)); ++ } while (running && net_seq_retry(running, seq)); + } + EXPORT_SYMBOL(__gnet_stats_copy_basic); + +@@ -164,7 +164,7 @@ EXPORT_SYMBOL(__gnet_stats_copy_basic); + * if the room in the socket buffer was not sufficient. + */ + int +-gnet_stats_copy_basic(const seqcount_t *running, ++gnet_stats_copy_basic(net_seqlock_t *running, + struct gnet_dump *d, + struct gnet_stats_basic_cpu __percpu *cpu, + struct gnet_stats_basic_packed *b) +diff --git a/net/core/skbuff.c b/net/core/skbuff.c +index 3864b4b68fa1..55c73ade9faa 100644 +--- a/net/core/skbuff.c ++++ b/net/core/skbuff.c +@@ -64,6 +64,7 @@ + #include <linux/errqueue.h> + #include <linux/prefetch.h> + #include <linux/if_vlan.h> ++#include <linux/locallock.h> + + #include <net/protocol.h> + #include <net/dst.h> +@@ -360,6 +361,8 @@ struct napi_alloc_cache { + + static DEFINE_PER_CPU(struct page_frag_cache, netdev_alloc_cache); + static DEFINE_PER_CPU(struct napi_alloc_cache, napi_alloc_cache); ++static DEFINE_LOCAL_IRQ_LOCK(netdev_alloc_lock); ++static DEFINE_LOCAL_IRQ_LOCK(napi_alloc_cache_lock); + + static void *__netdev_alloc_frag(unsigned int fragsz, gfp_t gfp_mask) + { +@@ -367,10 +370,10 @@ static void *__netdev_alloc_frag(unsigned int fragsz, gfp_t gfp_mask) + unsigned long flags; + void *data; + +- local_irq_save(flags); ++ local_lock_irqsave(netdev_alloc_lock, flags); + nc = this_cpu_ptr(&netdev_alloc_cache); + data = __alloc_page_frag(nc, fragsz, gfp_mask); +- local_irq_restore(flags); ++ local_unlock_irqrestore(netdev_alloc_lock, flags); + return data; + } + +@@ -389,9 +392,13 @@ EXPORT_SYMBOL(netdev_alloc_frag); + + static void *__napi_alloc_frag(unsigned int fragsz, gfp_t gfp_mask) + { +- struct napi_alloc_cache *nc = this_cpu_ptr(&napi_alloc_cache); ++ struct napi_alloc_cache *nc; ++ void *data; + +- return __alloc_page_frag(&nc->page, fragsz, gfp_mask); ++ nc = &get_locked_var(napi_alloc_cache_lock, napi_alloc_cache); ++ data = __alloc_page_frag(&nc->page, fragsz, gfp_mask); ++ put_locked_var(napi_alloc_cache_lock, napi_alloc_cache); ++ return data; + } + + void *napi_alloc_frag(unsigned int fragsz) +@@ -438,13 +445,13 @@ struct sk_buff *__netdev_alloc_skb(struct net_device *dev, unsigned int len, + if (sk_memalloc_socks()) + gfp_mask |= __GFP_MEMALLOC; + +- local_irq_save(flags); ++ local_lock_irqsave(netdev_alloc_lock, flags); + + nc = this_cpu_ptr(&netdev_alloc_cache); + data = __alloc_page_frag(nc, len, gfp_mask); + pfmemalloc = nc->pfmemalloc; + +- local_irq_restore(flags); ++ local_unlock_irqrestore(netdev_alloc_lock, flags); + + if (unlikely(!data)) + return NULL; +@@ -485,9 +492,10 @@ EXPORT_SYMBOL(__netdev_alloc_skb); + struct sk_buff *__napi_alloc_skb(struct napi_struct *napi, unsigned int len, + gfp_t gfp_mask) + { +- struct napi_alloc_cache *nc = this_cpu_ptr(&napi_alloc_cache); ++ struct napi_alloc_cache *nc; + struct sk_buff *skb; + void *data; ++ bool pfmemalloc; + + len += NET_SKB_PAD + NET_IP_ALIGN; + +@@ -505,7 +513,10 @@ struct sk_buff *__napi_alloc_skb(struct napi_struct *napi, unsigned int len, + if (sk_memalloc_socks()) + gfp_mask |= __GFP_MEMALLOC; + ++ nc = &get_locked_var(napi_alloc_cache_lock, napi_alloc_cache); + data = __alloc_page_frag(&nc->page, len, gfp_mask); ++ pfmemalloc = nc->page.pfmemalloc; ++ put_locked_var(napi_alloc_cache_lock, napi_alloc_cache); + if (unlikely(!data)) + return NULL; + +@@ -516,7 +527,7 @@ struct sk_buff *__napi_alloc_skb(struct napi_struct *napi, unsigned int len, + } + + /* use OR instead of assignment to avoid clearing of bits in mask */ +- if (nc->page.pfmemalloc) ++ if (pfmemalloc) + skb->pfmemalloc = 1; + skb->head_frag = 1; + +@@ -760,23 +771,26 @@ EXPORT_SYMBOL(consume_skb); + + void __kfree_skb_flush(void) + { +- struct napi_alloc_cache *nc = this_cpu_ptr(&napi_alloc_cache); ++ struct napi_alloc_cache *nc; + ++ nc = &get_locked_var(napi_alloc_cache_lock, napi_alloc_cache); + /* flush skb_cache if containing objects */ + if (nc->skb_count) { + kmem_cache_free_bulk(skbuff_head_cache, nc->skb_count, + nc->skb_cache); + nc->skb_count = 0; + } ++ put_locked_var(napi_alloc_cache_lock, napi_alloc_cache); + } + + static inline void _kfree_skb_defer(struct sk_buff *skb) + { +- struct napi_alloc_cache *nc = this_cpu_ptr(&napi_alloc_cache); ++ struct napi_alloc_cache *nc; + + /* drop skb->head and call any destructors for packet */ + skb_release_all(skb); + ++ nc = &get_locked_var(napi_alloc_cache_lock, napi_alloc_cache); + /* record skb to CPU local list */ + nc->skb_cache[nc->skb_count++] = skb; + +@@ -791,6 +805,7 @@ static inline void _kfree_skb_defer(struct sk_buff *skb) + nc->skb_cache); + nc->skb_count = 0; + } ++ put_locked_var(napi_alloc_cache_lock, napi_alloc_cache); + } + void __kfree_skb_defer(struct sk_buff *skb) + { +diff --git a/net/core/sock.c b/net/core/sock.c +index fd7b41edf1ce..e425d259a9f0 100644 +--- a/net/core/sock.c ++++ b/net/core/sock.c +@@ -2508,12 +2508,11 @@ void lock_sock_nested(struct sock *sk, int subclass) + if (sk->sk_lock.owned) + __lock_sock(sk); + sk->sk_lock.owned = 1; +- spin_unlock(&sk->sk_lock.slock); ++ spin_unlock_bh(&sk->sk_lock.slock); + /* + * The sk_lock has mutex_lock() semantics here: + */ + mutex_acquire(&sk->sk_lock.dep_map, subclass, 0, _RET_IP_); +- local_bh_enable(); + } + EXPORT_SYMBOL(lock_sock_nested); + +diff --git a/net/ipv4/icmp.c b/net/ipv4/icmp.c +index 38abe70e595f..443259a04862 100644 +--- a/net/ipv4/icmp.c ++++ b/net/ipv4/icmp.c +@@ -69,6 +69,7 @@ + #include <linux/jiffies.h> + #include <linux/kernel.h> + #include <linux/fcntl.h> ++#include <linux/sysrq.h> + #include <linux/socket.h> + #include <linux/in.h> + #include <linux/inet.h> +@@ -77,6 +78,7 @@ + #include <linux/string.h> + #include <linux/netfilter_ipv4.h> + #include <linux/slab.h> ++#include <linux/locallock.h> + #include <net/snmp.h> + #include <net/ip.h> + #include <net/route.h> +@@ -204,6 +206,8 @@ static const struct icmp_control icmp_pointers[NR_ICMP_TYPES+1]; + * + * On SMP we have one ICMP socket per-cpu. + */ ++static DEFINE_LOCAL_IRQ_LOCK(icmp_sk_lock); ++ + static struct sock *icmp_sk(struct net *net) + { + return *this_cpu_ptr(net->ipv4.icmp_sk); +@@ -215,12 +219,14 @@ static inline struct sock *icmp_xmit_lock(struct net *net) + + local_bh_disable(); + ++ local_lock(icmp_sk_lock); + sk = icmp_sk(net); + + if (unlikely(!spin_trylock(&sk->sk_lock.slock))) { + /* This can happen if the output path signals a + * dst_link_failure() for an outgoing ICMP packet. + */ ++ local_unlock(icmp_sk_lock); + local_bh_enable(); + return NULL; + } +@@ -230,6 +236,7 @@ static inline struct sock *icmp_xmit_lock(struct net *net) + static inline void icmp_xmit_unlock(struct sock *sk) + { + spin_unlock_bh(&sk->sk_lock.slock); ++ local_unlock(icmp_sk_lock); + } + + int sysctl_icmp_msgs_per_sec __read_mostly = 1000; +@@ -358,6 +365,7 @@ static void icmp_push_reply(struct icmp_bxm *icmp_param, + struct sock *sk; + struct sk_buff *skb; + ++ local_lock(icmp_sk_lock); + sk = icmp_sk(dev_net((*rt)->dst.dev)); + if (ip_append_data(sk, fl4, icmp_glue_bits, icmp_param, + icmp_param->data_len+icmp_param->head_len, +@@ -380,6 +388,7 @@ static void icmp_push_reply(struct icmp_bxm *icmp_param, + skb->ip_summed = CHECKSUM_NONE; + ip_push_pending_frames(sk, fl4); + } ++ local_unlock(icmp_sk_lock); + } + + /* +@@ -891,6 +900,30 @@ static bool icmp_redirect(struct sk_buff *skb) + } + + /* ++ * 32bit and 64bit have different timestamp length, so we check for ++ * the cookie at offset 20 and verify it is repeated at offset 50 ++ */ ++#define CO_POS0 20 ++#define CO_POS1 50 ++#define CO_SIZE sizeof(int) ++#define ICMP_SYSRQ_SIZE 57 ++ ++/* ++ * We got a ICMP_SYSRQ_SIZE sized ping request. Check for the cookie ++ * pattern and if it matches send the next byte as a trigger to sysrq. ++ */ ++static void icmp_check_sysrq(struct net *net, struct sk_buff *skb) ++{ ++ int cookie = htonl(net->ipv4.sysctl_icmp_echo_sysrq); ++ char *p = skb->data; ++ ++ if (!memcmp(&cookie, p + CO_POS0, CO_SIZE) && ++ !memcmp(&cookie, p + CO_POS1, CO_SIZE) && ++ p[CO_POS0 + CO_SIZE] == p[CO_POS1 + CO_SIZE]) ++ handle_sysrq(p[CO_POS0 + CO_SIZE]); ++} ++ ++/* + * Handle ICMP_ECHO ("ping") requests. + * + * RFC 1122: 3.2.2.6 MUST have an echo server that answers ICMP echo +@@ -917,6 +950,11 @@ static bool icmp_echo(struct sk_buff *skb) + icmp_param.data_len = skb->len; + icmp_param.head_len = sizeof(struct icmphdr); + icmp_reply(&icmp_param, skb); ++ ++ if (skb->len == ICMP_SYSRQ_SIZE && ++ net->ipv4.sysctl_icmp_echo_sysrq) { ++ icmp_check_sysrq(net, skb); ++ } + } + /* should there be an ICMP stat for ignored echos? */ + return true; +diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c +index 1cb67de106fe..332a485323f0 100644 +--- a/net/ipv4/sysctl_net_ipv4.c ++++ b/net/ipv4/sysctl_net_ipv4.c +@@ -681,6 +681,13 @@ static struct ctl_table ipv4_net_table[] = { + .proc_handler = proc_dointvec + }, + { ++ .procname = "icmp_echo_sysrq", ++ .data = &init_net.ipv4.sysctl_icmp_echo_sysrq, ++ .maxlen = sizeof(int), ++ .mode = 0644, ++ .proc_handler = proc_dointvec ++ }, ++ { + .procname = "icmp_ignore_bogus_error_responses", + .data = &init_net.ipv4.sysctl_icmp_ignore_bogus_error_responses, + .maxlen = sizeof(int), +diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c +index 7158d4f8dae4..0dc007fc6704 100644 +--- a/net/ipv4/tcp_ipv4.c ++++ b/net/ipv4/tcp_ipv4.c +@@ -62,6 +62,7 @@ + #include <linux/init.h> + #include <linux/times.h> + #include <linux/slab.h> ++#include <linux/locallock.h> + + #include <net/net_namespace.h> + #include <net/icmp.h> +@@ -565,6 +566,7 @@ void tcp_v4_send_check(struct sock *sk, struct sk_buff *skb) + } + EXPORT_SYMBOL(tcp_v4_send_check); + ++static DEFINE_LOCAL_IRQ_LOCK(tcp_sk_lock); + /* + * This routine will send an RST to the other tcp. + * +@@ -692,6 +694,8 @@ static void tcp_v4_send_reset(const struct sock *sk, struct sk_buff *skb) + offsetof(struct inet_timewait_sock, tw_bound_dev_if)); + + arg.tos = ip_hdr(skb)->tos; ++ ++ local_lock(tcp_sk_lock); + local_bh_disable(); + ip_send_unicast_reply(*this_cpu_ptr(net->ipv4.tcp_sk), + skb, &TCP_SKB_CB(skb)->header.h4.opt, +@@ -701,6 +705,7 @@ static void tcp_v4_send_reset(const struct sock *sk, struct sk_buff *skb) + __TCP_INC_STATS(net, TCP_MIB_OUTSEGS); + __TCP_INC_STATS(net, TCP_MIB_OUTRSTS); + local_bh_enable(); ++ local_unlock(tcp_sk_lock); + + #ifdef CONFIG_TCP_MD5SIG + out: +@@ -776,6 +781,7 @@ static void tcp_v4_send_ack(struct net *net, + if (oif) + arg.bound_dev_if = oif; + arg.tos = tos; ++ local_lock(tcp_sk_lock); + local_bh_disable(); + ip_send_unicast_reply(*this_cpu_ptr(net->ipv4.tcp_sk), + skb, &TCP_SKB_CB(skb)->header.h4.opt, +@@ -784,6 +790,7 @@ static void tcp_v4_send_ack(struct net *net, + + __TCP_INC_STATS(net, TCP_MIB_OUTSEGS); + local_bh_enable(); ++ local_unlock(tcp_sk_lock); + } + + static void tcp_v4_timewait_ack(struct sock *sk, struct sk_buff *skb) +diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c +index 9dce3b157908..525efa5309ac 100644 +--- a/net/mac80211/rx.c ++++ b/net/mac80211/rx.c +@@ -4064,7 +4064,7 @@ void ieee80211_rx_napi(struct ieee80211_hw *hw, struct ieee80211_sta *pubsta, + struct ieee80211_supported_band *sband; + struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); + +- WARN_ON_ONCE(softirq_count() == 0); ++ WARN_ON_ONCE_NONRT(softirq_count() == 0); + + if (WARN_ON(status->band >= NUM_NL80211_BANDS)) + goto drop; +diff --git a/net/netfilter/core.c b/net/netfilter/core.c +index f39276d1c2d7..10880c89d62f 100644 +--- a/net/netfilter/core.c ++++ b/net/netfilter/core.c +@@ -22,11 +22,17 @@ + #include <linux/proc_fs.h> + #include <linux/mutex.h> + #include <linux/slab.h> ++#include <linux/locallock.h> + #include <net/net_namespace.h> + #include <net/sock.h> + + #include "nf_internals.h" + ++#ifdef CONFIG_PREEMPT_RT_BASE ++DEFINE_LOCAL_IRQ_LOCK(xt_write_lock); ++EXPORT_PER_CPU_SYMBOL(xt_write_lock); ++#endif ++ + static DEFINE_MUTEX(afinfo_mutex); + + const struct nf_afinfo __rcu *nf_afinfo[NFPROTO_NUMPROTO] __read_mostly; +diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c +index 33a4697d5539..475cb74bf825 100644 +--- a/net/packet/af_packet.c ++++ b/net/packet/af_packet.c +@@ -63,6 +63,7 @@ + #include <linux/if_packet.h> + #include <linux/wireless.h> + #include <linux/kernel.h> ++#include <linux/delay.h> + #include <linux/kmod.h> + #include <linux/slab.h> + #include <linux/vmalloc.h> +@@ -695,7 +696,7 @@ static void prb_retire_rx_blk_timer_expired(unsigned long data) + if (BLOCK_NUM_PKTS(pbd)) { + while (atomic_read(&pkc->blk_fill_in_prog)) { + /* Waiting for skb_copy_bits to finish... */ +- cpu_relax(); ++ cpu_chill(); + } + } + +@@ -957,7 +958,7 @@ static void prb_retire_current_block(struct tpacket_kbdq_core *pkc, + if (!(status & TP_STATUS_BLK_TMO)) { + while (atomic_read(&pkc->blk_fill_in_prog)) { + /* Waiting for skb_copy_bits to finish... */ +- cpu_relax(); ++ cpu_chill(); + } + } + prb_close_block(pkc, pbd, po, status); +diff --git a/net/rds/ib_rdma.c b/net/rds/ib_rdma.c +index 977f69886c00..f3e7a36b0396 100644 +--- a/net/rds/ib_rdma.c ++++ b/net/rds/ib_rdma.c +@@ -34,6 +34,7 @@ + #include <linux/slab.h> + #include <linux/rculist.h> + #include <linux/llist.h> ++#include <linux/delay.h> + + #include "rds_single_path.h" + #include "ib_mr.h" +@@ -210,7 +211,7 @@ static inline void wait_clean_list_grace(void) + for_each_online_cpu(cpu) { + flag = &per_cpu(clean_list_grace, cpu); + while (test_bit(CLEAN_LIST_BUSY_BIT, flag)) +- cpu_relax(); ++ cpu_chill(); + } + } + +diff --git a/net/rxrpc/security.c b/net/rxrpc/security.c +index 814d285ff802..d4d088e9be85 100644 +--- a/net/rxrpc/security.c ++++ b/net/rxrpc/security.c +@@ -19,9 +19,6 @@ + #include <keys/rxrpc-type.h> + #include "ar-internal.h" + +-static LIST_HEAD(rxrpc_security_methods); +-static DECLARE_RWSEM(rxrpc_security_sem); +- + static const struct rxrpc_security *rxrpc_security_types[] = { + [RXRPC_SECURITY_NONE] = &rxrpc_no_security, + #ifdef CONFIG_RXKAD +diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c +index 12ebde845523..99f3ce50c6c4 100644 +--- a/net/sched/sch_api.c ++++ b/net/sched/sch_api.c +@@ -975,7 +975,7 @@ qdisc_create(struct net_device *dev, struct netdev_queue *dev_queue, + rcu_assign_pointer(sch->stab, stab); + } + if (tca[TCA_RATE]) { +- seqcount_t *running; ++ net_seqlock_t *running; + + err = -EOPNOTSUPP; + if (sch->flags & TCQ_F_MQROOT) +diff --git a/net/sched/sch_generic.c b/net/sched/sch_generic.c +index 657c13362b19..cbab8d4d5864 100644 +--- a/net/sched/sch_generic.c ++++ b/net/sched/sch_generic.c +@@ -426,7 +426,11 @@ struct Qdisc noop_qdisc = { + .list = LIST_HEAD_INIT(noop_qdisc.list), + .q.lock = __SPIN_LOCK_UNLOCKED(noop_qdisc.q.lock), + .dev_queue = &noop_netdev_queue, ++#ifdef CONFIG_PREEMPT_RT_BASE ++ .running = __SEQLOCK_UNLOCKED(noop_qdisc.running), ++#else + .running = SEQCNT_ZERO(noop_qdisc.running), ++#endif + .busylock = __SPIN_LOCK_UNLOCKED(noop_qdisc.busylock), + }; + EXPORT_SYMBOL(noop_qdisc); +@@ -620,9 +624,17 @@ struct Qdisc *qdisc_alloc(struct netdev_queue *dev_queue, + lockdep_set_class(&sch->busylock, + dev->qdisc_tx_busylock ?: &qdisc_tx_busylock); + ++#ifdef CONFIG_PREEMPT_RT_BASE ++ seqlock_init(&sch->running); ++ lockdep_set_class(&sch->running.seqcount, ++ dev->qdisc_running_key ?: &qdisc_running_key); ++ lockdep_set_class(&sch->running.lock, ++ dev->qdisc_running_key ?: &qdisc_running_key); ++#else + seqcount_init(&sch->running); + lockdep_set_class(&sch->running, + dev->qdisc_running_key ?: &qdisc_running_key); ++#endif + + sch->ops = ops; + sch->enqueue = ops->enqueue; +@@ -917,7 +929,7 @@ void dev_deactivate_many(struct list_head *head) + /* Wait for outstanding qdisc_run calls. */ + list_for_each_entry(dev, head, close_list) + while (some_qdisc_is_busy(dev)) +- yield(); ++ msleep(1); + } + + void dev_deactivate(struct net_device *dev) +diff --git a/net/sunrpc/svc_xprt.c b/net/sunrpc/svc_xprt.c +index c3f652395a80..2dd84493528e 100644 +--- a/net/sunrpc/svc_xprt.c ++++ b/net/sunrpc/svc_xprt.c +@@ -396,7 +396,7 @@ void svc_xprt_do_enqueue(struct svc_xprt *xprt) + goto out; + } + +- cpu = get_cpu(); ++ cpu = get_cpu_light(); + pool = svc_pool_for_cpu(xprt->xpt_server, cpu); + + atomic_long_inc(&pool->sp_stats.packets); +@@ -432,7 +432,7 @@ void svc_xprt_do_enqueue(struct svc_xprt *xprt) + + atomic_long_inc(&pool->sp_stats.threads_woken); + wake_up_process(rqstp->rq_task); +- put_cpu(); ++ put_cpu_light(); + goto out; + } + rcu_read_unlock(); +@@ -453,7 +453,7 @@ void svc_xprt_do_enqueue(struct svc_xprt *xprt) + goto redo_search; + } + rqstp = NULL; +- put_cpu(); ++ put_cpu_light(); + out: + trace_svc_xprt_do_enqueue(xprt, rqstp); + } +diff --git a/scripts/mkcompile_h b/scripts/mkcompile_h +index 6fdc97ef6023..523e0420d7f0 100755 +--- a/scripts/mkcompile_h ++++ b/scripts/mkcompile_h +@@ -4,7 +4,8 @@ TARGET=$1 + ARCH=$2 + SMP=$3 + PREEMPT=$4 +-CC=$5 ++RT=$5 ++CC=$6 + + vecho() { [ "${quiet}" = "silent_" ] || echo "$@" ; } + +@@ -57,6 +58,7 @@ UTS_VERSION="#$VERSION" + CONFIG_FLAGS="" + if [ -n "$SMP" ] ; then CONFIG_FLAGS="SMP"; fi + if [ -n "$PREEMPT" ] ; then CONFIG_FLAGS="$CONFIG_FLAGS PREEMPT"; fi ++if [ -n "$RT" ] ; then CONFIG_FLAGS="$CONFIG_FLAGS RT"; fi + UTS_VERSION="$UTS_VERSION $CONFIG_FLAGS $TIMESTAMP" + + # Truncate to maximum length +diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c +index c61fd50f771f..1583de410f62 100644 +--- a/sound/core/pcm_native.c ++++ b/sound/core/pcm_native.c +@@ -135,7 +135,7 @@ EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock); + void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream) + { + if (!substream->pcm->nonatomic) +- local_irq_disable(); ++ local_irq_disable_nort(); + snd_pcm_stream_lock(substream); + } + EXPORT_SYMBOL_GPL(snd_pcm_stream_lock_irq); +@@ -150,7 +150,7 @@ void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream) + { + snd_pcm_stream_unlock(substream); + if (!substream->pcm->nonatomic) +- local_irq_enable(); ++ local_irq_enable_nort(); + } + EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irq); + +@@ -158,7 +158,7 @@ unsigned long _snd_pcm_stream_lock_irqsave(struct snd_pcm_substream *substream) + { + unsigned long flags = 0; + if (!substream->pcm->nonatomic) +- local_irq_save(flags); ++ local_irq_save_nort(flags); + snd_pcm_stream_lock(substream); + return flags; + } +@@ -176,7 +176,7 @@ void snd_pcm_stream_unlock_irqrestore(struct snd_pcm_substream *substream, + { + snd_pcm_stream_unlock(substream); + if (!substream->pcm->nonatomic) +- local_irq_restore(flags); ++ local_irq_restore_nort(flags); + } + EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irqrestore); + diff --git a/target/linux/patches/4.8.5/startup.patch b/target/linux/patches/4.8.6/startup.patch index e54ac19a6..e54ac19a6 100644 --- a/target/linux/patches/4.8.5/startup.patch +++ b/target/linux/patches/4.8.6/startup.patch diff --git a/target/linux/patches/4.8.5/vdso2.patch b/target/linux/patches/4.8.6/vdso2.patch index 35df488a8..35df488a8 100644 --- a/target/linux/patches/4.8.5/vdso2.patch +++ b/target/linux/patches/4.8.6/vdso2.patch |