diff options
| author | Guo Ren <ren_guo@c-sky.com> | 2018-08-07 20:43:21 +0800 |
|---|---|---|
| committer | Waldemar Brodkorb <wbx@openadk.org> | 2018-08-16 21:42:42 +0200 |
| commit | 85baf42330a75ffa55e75625b80e743780dcccbf (patch) | |
| tree | 2dfcaf6de54c720801cc86fa80e7ee7813abbfa9 | |
| parent | 13c46fbc1e5a021f2b9ed32d83aecc93ae5e655d (diff) | |
sched_setaffinity: use the same style with glibc's
Call getpid() in INTERNAL_SYSCALL will break the argument regs,
because gcc couldn't save destoryed regs for system call asm.
Ref to glibc, we could just remove all the check code.
Signed-off-by: Guo Ren <ren_guo@c-sky.com>
| -rw-r--r-- | libc/sysdeps/linux/common/sched_setaffinity.c | 34 |
1 files changed, 0 insertions, 34 deletions
diff --git a/libc/sysdeps/linux/common/sched_setaffinity.c b/libc/sysdeps/linux/common/sched_setaffinity.c index 3d513ef4b..39f6ec8fa 100644 --- a/libc/sysdeps/linux/common/sched_setaffinity.c +++ b/libc/sysdeps/linux/common/sched_setaffinity.c @@ -27,42 +27,8 @@ static __always_inline _syscall3(int, __syscall_sched_setaffinity, __kernel_pid_t, pid, size_t, cpusetsize, const cpu_set_t *, cpuset) -static size_t __kernel_cpumask_size; - int sched_setaffinity(pid_t pid, size_t cpusetsize, const cpu_set_t *cpuset) { - size_t cnt; - int res; - size_t psize = 128; - void *p = alloca (psize); - - if (unlikely (__kernel_cpumask_size == 0)) { - - INTERNAL_SYSCALL_DECL (err); - while (res = INTERNAL_SYSCALL (sched_getaffinity, err, 3, getpid (), - psize, p), - INTERNAL_SYSCALL_ERROR_P (res, err) - && INTERNAL_SYSCALL_ERRNO (res, err) == EINVAL) - p = extend_alloca (p, psize, 2 * psize); - - if (res == 0 || INTERNAL_SYSCALL_ERROR_P (res, err)) { - __set_errno (INTERNAL_SYSCALL_ERRNO (res, err)); - return -1; - } - - __kernel_cpumask_size = res; - } - - /* We now know the size of the kernel cpumask_t. Make sure the user - does not request to set a bit beyond that. */ - for (cnt = __kernel_cpumask_size; cnt < cpusetsize; ++cnt) - if (((char *) cpuset)[cnt] != '\0') { - /* Found a nonzero byte. This means the user request cannot be - fulfilled. */ - __set_errno (EINVAL); - return -1; - } - return __syscall_sched_setaffinity(pid, cpusetsize, cpuset); } #endif |