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authorGuo Ren <ren_guo@c-sky.com>2018-08-07 12:43:21 (GMT)
committerWaldemar Brodkorb <wbx@openadk.org>2018-08-16 19:42:42 (GMT)
commit85baf42330a75ffa55e75625b80e743780dcccbf (patch)
tree2dfcaf6de54c720801cc86fa80e7ee7813abbfa9
parent13c46fbc1e5a021f2b9ed32d83aecc93ae5e655d (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.c34
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 3d513ef..39f6ec8 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