futex_unlock_pi
extern int futex_unlock_pi(u32 __user *uaddr, unsigned int flags);
return futex_unlock_pi(uaddr, flags);
ret = futex_unlock_pi(w->futex, futex_flag);
futex_unlock_pi(&futex2, futex_flag);
futex_unlock_pi(&f2, FUTEX_PRIVATE_FLAG);
futex_unlock_pi(&f2, FUTEX_PRIVATE_FLAG);
futex_unlock_pi(&f2, FUTEX_PRIVATE_FLAG);
ret2 = futex_unlock_pi(&f2, FUTEX_PRIVATE_FLAG);
futex_unlock_pi(&f2, FUTEX_PRIVATE_FLAG);
futex_unlock_pi(&f2, FUTEX_PRIVATE_FLAG);