futex_wait_requeue_pi
extern int futex_wait_requeue_pi(u32 __user *uaddr, unsigned int flags, u32
return futex_wait_requeue_pi(uaddr, flags, val, timeout, val3,
ret = futex_wait_requeue_pi(&futex1, 0, &futex2,
args->ret = futex_wait_requeue_pi(&f1, old_val, &f2, args->timeout,
res = futex_wait_requeue_pi(&f1, old_val, &(f2), NULL,
res = futex_wait_requeue_pi(&f1, f1, &futex_pi, &to, FUTEX_CLOCK_REALTIME);
res = futex_wait_requeue_pi(&f1, f1, &futex_pi, &to, 0);