Symbol: UMTX_OP_WAIT
lib/libthr/thread/thr_umtx.c
188
return (_umtx_op_err(__DEVOLATILE(void *, mtx), UMTX_OP_WAIT, id, 0,
sys/kern/kern_umtx.c
4907
[UMTX_OP_WAIT] = __umtx_op_wait,