Symbol: UMTX_OP_RW_UNLOCK
lib/libthr/thread/thr_umtx.c
322
return (_umtx_op_err(rwlock, UMTX_OP_RW_UNLOCK, 0, NULL, NULL));
sys/kern/kern_umtx.c
4919
[UMTX_OP_RW_UNLOCK] = __umtx_op_rw_unlock,