sys_sched_getaffinity
asmlinkage long sys_sched_getaffinity(pid_t pid, unsigned int len,
__SC_COMP(__NR_sched_getaffinity, sys_sched_getaffinity, \
__SC_COMP(__NR_sched_getaffinity, sys_sched_getaffinity, \
} while (sys_sched_getaffinity(0, len, m) == -1 && errno == EINVAL);