Symbol: UMTX_OP_MUTEX_UNLOCK
lib/libthr/thread/thr_umtx.c
163
return (_umtx_op_err(mtx, UMTX_OP_MUTEX_UNLOCK, 0, 0, 0));
sys/kern/kern_umtx.c
4911
[UMTX_OP_MUTEX_UNLOCK] = __umtx_op_unlock_umutex,