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 &lt;ren_guo(a)c-sky.com&gt; --- libc/sysdeps/linux/common/sched_setaffinity.c | 34 --------------------------- 1 file changed, 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 -- 2.7.4