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authorWaldemar Brodkorb <wbx@uclibc-ng.org>2016-11-01 21:49:14 +0100
committerWaldemar Brodkorb <wbx@uclibc-ng.org>2016-11-01 21:49:14 +0100
commit21a6e6df534b1921f486c4eac3cb8d01e96743a7 (patch)
treecaba3851a794e70028263ea89fcc61a9a8f5398b /target/linux
parent05ddeceb9dea89bb01539355591d588990544646 (diff)
linux: update realtime patch, reported by Oliver
Diffstat (limited to 'target/linux')
-rw-r--r--target/linux/patches/4.4.28/patch-realtime7643
1 files changed, 3737 insertions, 3906 deletions
diff --git a/target/linux/patches/4.4.28/patch-realtime b/target/linux/patches/4.4.28/patch-realtime
index f4cb92ae5..9dd3be37b 100644
--- a/target/linux/patches/4.4.28/patch-realtime
+++ b/target/linux/patches/4.4.28/patch-realtime
@@ -1,371 +1,6 @@
- From:
- https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/
-
-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/kernel-parameters.txt b/Documentation/kernel-parameters.txt
-index 0e4102ae1a61..26b5f39d57a8 100644
---- a/Documentation/kernel-parameters.txt
-+++ b/Documentation/kernel-parameters.txt
-@@ -1629,6 +1629,15 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
- ip= [IP_PNP]
- See Documentation/filesystems/nfs/nfsroot.txt.
-
-+ irqaffinity= [SMP] Set the default irq affinity mask
-+ Format:
-+ <cpu number>,...,<cpu number>
-+ or
-+ <cpu number>-<cpu number>
-+ (must be a positive range in ascending order)
-+ or a mixture
-+ <cpu number>,...,<cpu number>-<cpu number>
-+
- irqfixup [HW]
- When an interrupt is not handled search all handlers
- for it. Intended to get systems with badly broken
-diff --git a/Documentation/sysrq.txt b/Documentation/sysrq.txt
-index 13f5619b2203..f64d075ba647 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 695c64ec160c..45b60fceb84b 100644
---- a/Makefile
-+++ b/Makefile
-@@ -768,6 +768,9 @@ KBUILD_CFLAGS += $(call cc-option,-Werror=strict-prototypes)
- # Prohibit date/time macros, which would make the build non-deterministic
- KBUILD_CFLAGS += $(call cc-option,-Werror=date-time)
-
-+# enforce correct pointer usage
-+KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types)
-+
- # use the deterministic mode of AR if available
- KBUILD_ARFLAGS := $(call ar-option,D)
-
-diff --git a/arch/Kconfig b/arch/Kconfig
-index 4e949e58b192..3b26d76933fb 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 34e1569a11ee..79c4603e9453 100644
---- a/arch/arm/Kconfig
-+++ b/arch/arm/Kconfig
-@@ -33,7 +33,7 @@ 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 && !CPU_ENDIAN_BE32
-+ select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL && !CPU_ENDIAN_BE32 && !PREEMPT_RT_BASE
- select HAVE_ARCH_KGDB if !CPU_ENDIAN_BE32
- select HAVE_ARCH_SECCOMP_FILTER if (AEABI && !OABI_COMPAT)
- select HAVE_ARCH_TRACEHOOK
-@@ -68,6 +68,7 @@ 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
+diff -Nur linux-4.4.28.orig/arch/arm/include/asm/switch_to.h linux-4.4.28/arch/arm/include/asm/switch_to.h
+--- linux-4.4.28.orig/arch/arm/include/asm/switch_to.h 2016-10-28 09:53:25.000000000 +0200
++++ linux-4.4.28/arch/arm/include/asm/switch_to.h 2016-11-01 21:26:56.728210258 +0100
@@ -3,6 +3,13 @@
#include <linux/thread_info.h>
@@ -380,7 +15,7 @@ index 12ebfcc1d539..c962084605bc 100644
/*
* 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
+@@ -25,6 +32,7 @@
#define switch_to(prev,next,last) \
do { \
__complete_pending_tlbi(); \
@@ -388,11 +23,10 @@ index 12ebfcc1d539..c962084605bc 100644
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 {
+diff -Nur linux-4.4.28.orig/arch/arm/include/asm/thread_info.h linux-4.4.28/arch/arm/include/asm/thread_info.h
+--- linux-4.4.28.orig/arch/arm/include/asm/thread_info.h 2016-10-28 09:53:25.000000000 +0200
++++ linux-4.4.28/arch/arm/include/asm/thread_info.h 2016-11-01 21:26:56.748211548 +0100
+@@ -49,6 +49,7 @@
struct thread_info {
unsigned long flags; /* low level flags */
int preempt_count; /* 0 => preemptable, <0 => bug */
@@ -400,7 +34,7 @@ index 776757d1604a..1f36a4eccc72 100644
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 *,
+@@ -142,7 +143,8 @@
#define TIF_SYSCALL_TRACE 4 /* syscall trace active */
#define TIF_SYSCALL_AUDIT 5 /* syscall auditing active */
#define TIF_SYSCALL_TRACEPOINT 6 /* syscall tracepoint instrumentation */
@@ -410,7 +44,7 @@ index 776757d1604a..1f36a4eccc72 100644
#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 *,
+@@ -152,6 +154,7 @@
#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
@@ -418,7 +52,7 @@ index 776757d1604a..1f36a4eccc72 100644
#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 *,
+@@ -167,7 +170,8 @@
* Change these and you break ASM code in entry-common.S
*/
#define _TIF_WORK_MASK (_TIF_NEED_RESCHED | _TIF_SIGPENDING | \
@@ -428,11 +62,30 @@ index 776757d1604a..1f36a4eccc72 100644
#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 871b8267d211..4dbe70de7318 100644
---- a/arch/arm/kernel/asm-offsets.c
-+++ b/arch/arm/kernel/asm-offsets.c
-@@ -65,6 +65,7 @@ int main(void)
+diff -Nur linux-4.4.28.orig/arch/arm/Kconfig linux-4.4.28/arch/arm/Kconfig
+--- linux-4.4.28.orig/arch/arm/Kconfig 2016-10-28 09:53:25.000000000 +0200
++++ linux-4.4.28/arch/arm/Kconfig 2016-11-01 21:26:56.696208202 +0100
+@@ -33,7 +33,7 @@
+ 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 && !CPU_ENDIAN_BE32
++ select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL && !CPU_ENDIAN_BE32 && !PREEMPT_RT_BASE
+ select HAVE_ARCH_KGDB if !CPU_ENDIAN_BE32
+ select HAVE_ARCH_SECCOMP_FILTER if (AEABI && !OABI_COMPAT)
+ select HAVE_ARCH_TRACEHOOK
+@@ -68,6 +68,7 @@
+ 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-4.4.28.orig/arch/arm/kernel/asm-offsets.c linux-4.4.28/arch/arm/kernel/asm-offsets.c
+--- linux-4.4.28.orig/arch/arm/kernel/asm-offsets.c 2016-10-28 09:53:25.000000000 +0200
++++ linux-4.4.28/arch/arm/kernel/asm-offsets.c 2016-11-01 21:26:56.760212322 +0100
+@@ -65,6 +65,7 @@
BLANK();
DEFINE(TI_FLAGS, offsetof(struct thread_info, flags));
DEFINE(TI_PREEMPT, offsetof(struct thread_info, preempt_count));
@@ -440,11 +93,10 @@ index 871b8267d211..4dbe70de7318 100644
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 3ce377f7251f..d044cea59f54 100644
---- a/arch/arm/kernel/entry-armv.S
-+++ b/arch/arm/kernel/entry-armv.S
-@@ -215,11 +215,18 @@ __irq_svc:
+diff -Nur linux-4.4.28.orig/arch/arm/kernel/entry-armv.S linux-4.4.28/arch/arm/kernel/entry-armv.S
+--- linux-4.4.28.orig/arch/arm/kernel/entry-armv.S 2016-10-28 09:53:25.000000000 +0200
++++ linux-4.4.28/arch/arm/kernel/entry-armv.S 2016-11-01 21:26:56.764212578 +0100
+@@ -215,11 +215,18 @@
#ifdef CONFIG_PREEMPT
get_thread_info tsk
ldr r8, [tsk, #TI_PREEMPT] @ get preempt count
@@ -465,7 +117,7 @@ index 3ce377f7251f..d044cea59f54 100644
#endif
svc_exit r5, irq = 1 @ return from exception
-@@ -234,8 +241,14 @@ svc_preempt:
+@@ -234,8 +241,14 @@
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
@@ -481,11 +133,10 @@ index 3ce377f7251f..d044cea59f54 100644
#endif
__und_fault:
-diff --git a/arch/arm/kernel/entry-common.S b/arch/arm/kernel/entry-common.S
-index 30a7228eaceb..c3bd6cbfce4b 100644
---- a/arch/arm/kernel/entry-common.S
-+++ b/arch/arm/kernel/entry-common.S
-@@ -36,7 +36,9 @@ ret_fast_syscall:
+diff -Nur linux-4.4.28.orig/arch/arm/kernel/entry-common.S linux-4.4.28/arch/arm/kernel/entry-common.S
+--- linux-4.4.28.orig/arch/arm/kernel/entry-common.S 2016-10-28 09:53:25.000000000 +0200
++++ linux-4.4.28/arch/arm/kernel/entry-common.S 2016-11-01 21:26:56.764212578 +0100
+@@ -36,7 +36,9 @@
UNWIND(.cantunwind )
disable_irq_notrace @ disable interrupts
ldr r1, [tsk, #TI_FLAGS] @ re-check for syscall tracing
@@ -496,7 +147,7 @@ index 30a7228eaceb..c3bd6cbfce4b 100644
bne fast_work_pending
/* perform architecture specific actions before user return */
-@@ -62,8 +64,11 @@ ret_fast_syscall:
+@@ -62,8 +64,11 @@
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
@@ -509,11 +160,10 @@ index 30a7228eaceb..c3bd6cbfce4b 100644
UNWIND(.fnend )
ENDPROC(ret_fast_syscall)
-diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c
-index 4adfb46e3ee9..15f1d94b47c5 100644
---- a/arch/arm/kernel/process.c
-+++ b/arch/arm/kernel/process.c
-@@ -319,6 +319,30 @@ unsigned long arch_randomize_brk(struct mm_struct *mm)
+diff -Nur linux-4.4.28.orig/arch/arm/kernel/process.c linux-4.4.28/arch/arm/kernel/process.c
+--- linux-4.4.28.orig/arch/arm/kernel/process.c 2016-10-28 09:53:25.000000000 +0200
++++ linux-4.4.28/arch/arm/kernel/process.c 2016-11-01 21:26:56.772213095 +0100
+@@ -319,6 +319,30 @@
}
#ifdef CONFIG_MMU
@@ -544,11 +194,10 @@ index 4adfb46e3ee9..15f1d94b47c5 100644
#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)
+diff -Nur linux-4.4.28.orig/arch/arm/kernel/signal.c linux-4.4.28/arch/arm/kernel/signal.c
+--- linux-4.4.28.orig/arch/arm/kernel/signal.c 2016-10-28 09:53:25.000000000 +0200
++++ linux-4.4.28/arch/arm/kernel/signal.c 2016-11-01 21:26:56.772213095 +0100
+@@ -572,7 +572,8 @@
*/
trace_hardirqs_off();
do {
@@ -558,11 +207,10 @@ index 7b8f2141427b..96541e00b74a 100644
schedule();
} else {
if (unlikely(!user_mode(regs)))
-diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
-index b26361355dae..e5754e3b03c4 100644
---- a/arch/arm/kernel/smp.c
-+++ b/arch/arm/kernel/smp.c
-@@ -230,8 +230,6 @@ int __cpu_disable(void)
+diff -Nur linux-4.4.28.orig/arch/arm/kernel/smp.c linux-4.4.28/arch/arm/kernel/smp.c
+--- linux-4.4.28.orig/arch/arm/kernel/smp.c 2016-10-28 09:53:25.000000000 +0200
++++ linux-4.4.28/arch/arm/kernel/smp.c 2016-11-01 21:26:56.772213095 +0100
+@@ -230,8 +230,6 @@
flush_cache_louis();
local_flush_tlb_all();
@@ -571,7 +219,7 @@ index b26361355dae..e5754e3b03c4 100644
return 0;
}
-@@ -247,6 +245,9 @@ void __cpu_die(unsigned int cpu)
+@@ -247,6 +245,9 @@
pr_err("CPU%u: cpu didn't die\n", cpu);
return;
}
@@ -581,11 +229,10 @@ index b26361355dae..e5754e3b03c4 100644
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[];
+diff -Nur linux-4.4.28.orig/arch/arm/kernel/unwind.c linux-4.4.28/arch/arm/kernel/unwind.c
+--- linux-4.4.28.orig/arch/arm/kernel/unwind.c 2016-10-28 09:53:25.000000000 +0200
++++ linux-4.4.28/arch/arm/kernel/unwind.c 2016-11-01 21:26:56.776213352 +0100
+@@ -93,7 +93,7 @@
static const struct unwind_idx *__origin_unwind_idx;
extern const struct unwind_idx __stop_unwind_idx[];
@@ -594,7 +241,7 @@ index 0bee233fef9a..314cfb232a63 100644
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)
+@@ -201,7 +201,7 @@
/* module unwind tables */
struct unwind_table *table;
@@ -603,7 +250,7 @@ index 0bee233fef9a..314cfb232a63 100644
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)
+@@ -213,7 +213,7 @@
break;
}
}
@@ -612,7 +259,7 @@ index 0bee233fef9a..314cfb232a63 100644
}
pr_debug("%s: idx = %p\n", __func__, idx);
-@@ -529,9 +529,9 @@ struct unwind_table *unwind_table_add(unsigned long start, unsigned long size,
+@@ -529,9 +529,9 @@
tab->begin_addr = text_addr;
tab->end_addr = text_addr + text_size;
@@ -624,7 +271,7 @@ index 0bee233fef9a..314cfb232a63 100644
return tab;
}
-@@ -543,9 +543,9 @@ void unwind_table_del(struct unwind_table *tab)
+@@ -543,9 +543,9 @@
if (!tab)
return;
@@ -636,11 +283,10 @@ index 0bee233fef9a..314cfb232a63 100644
kfree(tab);
}
-diff --git a/arch/arm/kvm/arm.c b/arch/arm/kvm/arm.c
-index e06fd299de08..bb43bc396f06 100644
---- a/arch/arm/kvm/arm.c
-+++ b/arch/arm/kvm/arm.c
-@@ -498,18 +498,18 @@ static void kvm_arm_resume_guest(struct kvm *kvm)
+diff -Nur linux-4.4.28.orig/arch/arm/kvm/arm.c linux-4.4.28/arch/arm/kvm/arm.c
+--- linux-4.4.28.orig/arch/arm/kvm/arm.c 2016-10-28 09:53:25.000000000 +0200
++++ linux-4.4.28/arch/arm/kvm/arm.c 2016-11-01 21:26:56.776213352 +0100
+@@ -496,18 +496,18 @@
struct kvm_vcpu *vcpu;
kvm_for_each_vcpu(i, vcpu, kvm) {
@@ -663,7 +309,7 @@ index e06fd299de08..bb43bc396f06 100644
(!vcpu->arch.pause)));
}
-@@ -568,7 +568,7 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
+@@ -566,7 +566,7 @@
* involves poking the GIC, which must be done in a
* non-preemptible context.
*/
@@ -672,7 +318,7 @@ index e06fd299de08..bb43bc396f06 100644
kvm_timer_flush_hwstate(vcpu);
kvm_vgic_flush_hwstate(vcpu);
-@@ -587,7 +587,7 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
+@@ -585,7 +585,7 @@
local_irq_enable();
kvm_timer_sync_hwstate(vcpu);
kvm_vgic_sync_hwstate(vcpu);
@@ -681,7 +327,7 @@ index e06fd299de08..bb43bc396f06 100644
continue;
}
-@@ -641,7 +641,7 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
+@@ -639,7 +639,7 @@
kvm_vgic_sync_hwstate(vcpu);
@@ -690,11 +336,10 @@ index e06fd299de08..bb43bc396f06 100644
ret = handle_exit(vcpu, run, ret);
}
-diff --git a/arch/arm/kvm/psci.c b/arch/arm/kvm/psci.c
-index a9b3b905e661..c2b131527a64 100644
---- a/arch/arm/kvm/psci.c
-+++ b/arch/arm/kvm/psci.c
-@@ -70,7 +70,7 @@ static unsigned long kvm_psci_vcpu_on(struct kvm_vcpu *source_vcpu)
+diff -Nur linux-4.4.28.orig/arch/arm/kvm/psci.c linux-4.4.28/arch/arm/kvm/psci.c
+--- linux-4.4.28.orig/arch/arm/kvm/psci.c 2016-10-28 09:53:25.000000000 +0200
++++ linux-4.4.28/arch/arm/kvm/psci.c 2016-11-01 21:26:56.780213616 +0100
+@@ -70,7 +70,7 @@
{
struct kvm *kvm = source_vcpu->kvm;
struct kvm_vcpu *vcpu = NULL;
@@ -703,7 +348,7 @@ index a9b3b905e661..c2b131527a64 100644
unsigned long cpu_id;
unsigned long context_id;
phys_addr_t target_pc;
-@@ -119,7 +119,7 @@ static unsigned long kvm_psci_vcpu_on(struct kvm_vcpu *source_vcpu)
+@@ -119,7 +119,7 @@
smp_mb(); /* Make sure the above is visible */
wq = kvm_arch_vcpu_wq(vcpu);
@@ -712,22 +357,9 @@ index a9b3b905e661..c2b131527a64 100644
return PSCI_RET_SUCCESS;
}
-diff --git a/arch/arm/mach-at91/Kconfig b/arch/arm/mach-at91/Kconfig
-index 28656c2b54a0..3f501305ca26 100644
---- a/arch/arm/mach-at91/Kconfig
-+++ b/arch/arm/mach-at91/Kconfig
-@@ -99,6 +99,7 @@ config HAVE_AT91_USB_CLK
- config COMMON_CLK_AT91
- bool
- select COMMON_CLK
-+ select MFD_SYSCON
-
- config HAVE_AT91_SMD
- bool
-diff --git a/arch/arm/mach-at91/at91rm9200.c b/arch/arm/mach-at91/at91rm9200.c
-index c1a7c6cc00e1..63b4fa25b48a 100644
---- a/arch/arm/mach-at91/at91rm9200.c
-+++ b/arch/arm/mach-at91/at91rm9200.c
+diff -Nur linux-4.4.28.orig/arch/arm/mach-at91/at91rm9200.c linux-4.4.28/arch/arm/mach-at91/at91rm9200.c
+--- linux-4.4.28.orig/arch/arm/mach-at91/at91rm9200.c 2016-10-28 09:53:25.000000000 +0200
++++ linux-4.4.28/arch/arm/mach-at91/at91rm9200.c 2016-11-01 21:26:56.784213869 +0100
@@ -12,7 +12,6 @@
#include <linux/of_platform.h>
@@ -736,7 +368,7 @@ index c1a7c6cc00e1..63b4fa25b48a 100644
#include "generic.h"
#include "soc.h"
-@@ -33,7 +32,6 @@ static void __init at91rm9200_dt_device_init(void)
+@@ -33,7 +32,6 @@
of_platform_populate(NULL, of_default_bus_match_table, NULL, soc_dev);
@@ -744,11 +376,10 @@ index c1a7c6cc00e1..63b4fa25b48a 100644
at91rm9200_pm_init();
}
-diff --git a/arch/arm/mach-at91/at91sam9.c b/arch/arm/mach-at91/at91sam9.c
-index 7eb64f763034..cada2a6412b3 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)
+diff -Nur linux-4.4.28.orig/arch/arm/mach-at91/at91sam9.c linux-4.4.28/arch/arm/mach-at91/at91sam9.c
+--- linux-4.4.28.orig/arch/arm/mach-at91/at91sam9.c 2016-10-28 09:53:25.000000000 +0200
++++ linux-4.4.28/arch/arm/mach-at91/at91sam9.c 2016-11-01 21:26:56.784213869 +0100
+@@ -62,8 +62,6 @@
soc_dev = soc_device_to_device(soc);
of_platform_populate(NULL, of_default_bus_match_table, NULL, soc_dev);
@@ -757,10 +388,9 @@ index 7eb64f763034..cada2a6412b3 100644
}
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
+diff -Nur linux-4.4.28.orig/arch/arm/mach-at91/generic.h linux-4.4.28/arch/arm/mach-at91/generic.h
+--- linux-4.4.28.orig/arch/arm/mach-at91/generic.h 2016-10-28 09:53:25.000000000 +0200
++++ linux-4.4.28/arch/arm/mach-at91/generic.h 2016-11-01 21:26:56.784213869 +0100
@@ -11,27 +11,18 @@
#ifndef _AT91_GENERIC_H
#define _AT91_GENERIC_H
@@ -791,10 +421,20 @@ index b0fa7dc7286d..28ca57a2060f 100644
#endif
#endif /* _AT91_GENERIC_H */
-diff --git a/arch/arm/mach-at91/pm.c b/arch/arm/mach-at91/pm.c
-index 23726fb31741..f06270198bf1 100644
---- a/arch/arm/mach-at91/pm.c
-+++ b/arch/arm/mach-at91/pm.c
+diff -Nur linux-4.4.28.orig/arch/arm/mach-at91/Kconfig linux-4.4.28/arch/arm/mach-at91/Kconfig
+--- linux-4.4.28.orig/arch/arm/mach-at91/Kconfig 2016-10-28 09:53:25.000000000 +0200
++++ linux-4.4.28/arch/arm/mach-at91/Kconfig 2016-11-01 21:26:56.784213869 +0100
+@@ -99,6 +99,7 @@
+ config COMMON_CLK_AT91
+ bool
+ select COMMON_CLK
++ select MFD_SYSCON
+
+ config HAVE_AT91_SMD
+ bool
+diff -Nur linux-4.4.28.orig/arch/arm/mach-at91/pm.c linux-4.4.28/arch/arm/mach-at91/pm.c
+--- linux-4.4.28.orig/arch/arm/mach-at91/pm.c 2016-10-28 09:53:25.000000000 +0200
++++ linux-4.4.28/arch/arm/mach-at91/pm.c 2016-11-01 21:26:56.788214125 +0100
@@ -31,10 +31,13 @@
#include <asm/mach/irq.h>
#include <asm/fncpy.h>
@@ -809,7 +449,7 @@ index 23726fb31741..f06270198bf1 100644
/*
* FIXME: this is needed to communicate between the pinctrl driver and
* the PM implementation in the machine. Possibly part of the PM
-@@ -87,7 +90,7 @@ static int at91_pm_verify_clocks(void)
+@@ -87,7 +90,7 @@
unsigned long scsr;
int i;
@@ -818,7 +458,7 @@ index 23726fb31741..f06270198bf1 100644
/* USB must not be using PLLB */
if ((scsr & at91_pm_data.uhp_udp_mask) != 0) {
-@@ -101,8 +104,7 @@ static int at91_pm_verify_clocks(void)
+@@ -101,8 +104,7 @@
if ((scsr & (AT91_PMC_PCK0 << i)) == 0)
continue;
@@ -828,7 +468,7 @@ index 23726fb31741..f06270198bf1 100644
if (css != AT91_PMC_CSS_SLOW) {
pr_err("AT91: PM - Suspend-to-RAM with PCK%d src %d\n", i, css);
return 0;
-@@ -145,8 +147,8 @@ static void at91_pm_suspend(suspend_state_t state)
+@@ -145,8 +147,8 @@
flush_cache_all();
outer_disable();
@@ -839,7 +479,7 @@ index 23726fb31741..f06270198bf1 100644
outer_resume();
}
-@@ -353,6 +355,21 @@ static __init void at91_dt_ramc(void)
+@@ -353,6 +355,21 @@
at91_pm_set_standby(standby);
}
@@ -861,7 +501,7 @@ index 23726fb31741..f06270198bf1 100644
static void __init at91_pm_sram_init(void)
{
struct gen_pool *sram_pool;
-@@ -399,13 +416,36 @@ static void __init at91_pm_sram_init(void)
+@@ -399,13 +416,36 @@
&at91_pm_suspend_in_sram, at91_pm_suspend_in_sram_sz);
}
@@ -900,7 +540,7 @@ index 23726fb31741..f06270198bf1 100644
if (at91_suspend_sram_fn)
suspend_set_ops(&at91_pm_ops);
else
-@@ -424,7 +464,7 @@ void __init at91rm9200_pm_init(void)
+@@ -424,7 +464,7 @@
at91_pm_data.uhp_udp_mask = AT91RM9200_PMC_UHP | AT91RM9200_PMC_UDP;
at91_pm_data.memctrl = AT91_MEMCTRL_MC;
@@ -909,7 +549,7 @@ index 23726fb31741..f06270198bf1 100644
}
void __init at91sam9260_pm_init(void)
-@@ -432,7 +472,7 @@ void __init at91sam9260_pm_init(void)
+@@ -432,7 +472,7 @@
at91_dt_ramc();
at91_pm_data.memctrl = AT91_MEMCTRL_SDRAMC;
at91_pm_data.uhp_udp_mask = AT91SAM926x_PMC_UHP | AT91SAM926x_PMC_UDP;
@@ -918,7 +558,7 @@ index 23726fb31741..f06270198bf1 100644
}
void __init at91sam9g45_pm_init(void)
-@@ -440,7 +480,7 @@ void __init at91sam9g45_pm_init(void)
+@@ -440,7 +480,7 @@
at91_dt_ramc();
at91_pm_data.uhp_udp_mask = AT91SAM926x_PMC_UHP;
at91_pm_data.memctrl = AT91_MEMCTRL_DDRSDR;
@@ -927,7 +567,7 @@ index 23726fb31741..f06270198bf1 100644
}
void __init at91sam9x5_pm_init(void)
-@@ -448,5 +488,13 @@ void __init at91sam9x5_pm_init(void)
+@@ -448,5 +488,13 @@
at91_dt_ramc();
at91_pm_data.uhp_udp_mask = AT91SAM926x_PMC_UHP | AT91SAM926x_PMC_UDP;
at91_pm_data.memctrl = AT91_MEMCTRL_DDRSDR;
@@ -942,11 +582,10 @@ index 23726fb31741..f06270198bf1 100644
+ 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 d9cf6799aec0..df8fdf1cf66d 100644
---- a/arch/arm/mach-at91/sama5.c
-+++ b/arch/arm/mach-at91/sama5.c
-@@ -51,7 +51,7 @@ static void __init sama5_dt_device_init(void)
+diff -Nur linux-4.4.28.orig/arch/arm/mach-at91/sama5.c linux-4.4.28/arch/arm/mach-at91/sama5.c
+--- linux-4.4.28.orig/arch/arm/mach-at91/sama5.c 2016-10-28 09:53:25.000000000 +0200
++++ linux-4.4.28/arch/arm/mach-at91/sama5.c 2016-11-01 21:26:56.788214125 +0100
+@@ -51,7 +51,7 @@
soc_dev = soc_device_to_device(soc);
of_platform_populate(NULL, of_default_bus_match_table, NULL, soc_dev);
@@ -955,11 +594,10 @@ index d9cf6799aec0..df8fdf1cf66d 100644
}
static const char *const sama5_dt_board_compat[] __initconst = {
-diff --git a/arch/arm/mach-exynos/platsmp.c b/arch/arm/mach-exynos/platsmp.c
-index 98a2c0cbb833..310dce500d3e 100644
---- a/arch/arm/mach-exynos/platsmp.c
-+++ b/arch/arm/mach-exynos/platsmp.c
-@@ -230,7 +230,7 @@ static void __iomem *scu_base_addr(void)
+diff -Nur linux-4.4.28.orig/arch/arm/mach-exynos/platsmp.c linux-4.4.28/arch/arm/mach-exynos/platsmp.c
+--- linux-4.4.28.orig/arch/arm/mach-exynos/platsmp.c 2016-10-28 09:53:25.000000000 +0200
++++ linux-4.4.28/arch/arm/mach-exynos/platsmp.c 2016-11-01 21:26:56.796214642 +0100
+@@ -230,7 +230,7 @@
return (void __iomem *)(S5P_VA_SCU);
}
@@ -968,7 +606,7 @@ index 98a2c0cbb833..310dce500d3e 100644
static void exynos_secondary_init(unsigned int cpu)
{
-@@ -243,8 +243,8 @@ static void exynos_secondary_init(unsigned int cpu)
+@@ -243,8 +243,8 @@
/*
* Synchronise with the boot thread.
*/
@@ -979,7 +617,7 @@ index 98a2c0cbb833..310dce500d3e 100644
}
int exynos_set_boot_addr(u32 core_id, unsigned long boot_addr)
-@@ -308,7 +308,7 @@ static int exynos_boot_secondary(unsigned int cpu, struct task_struct *idle)
+@@ -308,7 +308,7 @@
* Set synchronisation state between this boot processor
* and the secondary one
*/
@@ -988,7 +626,7 @@ index 98a2c0cbb833..310dce500d3e 100644
/*
* The secondary processor is waiting to be released from
-@@ -335,7 +335,7 @@ static int exynos_boot_secondary(unsigned int cpu, struct task_struct *idle)
+@@ -335,7 +335,7 @@
if (timeout == 0) {
printk(KERN_ERR "cpu1 power enable failed");
@@ -997,7 +635,7 @@ index 98a2c0cbb833..310dce500d3e 100644
return -ETIMEDOUT;
}
}
-@@ -381,7 +381,7 @@ static int exynos_boot_secondary(unsigned int cpu, struct task_struct *idle)
+@@ -381,7 +381,7 @@