Symbol: sys__umtx_op
sys/kern/init_sysent.c
523
{ .sy_narg = AS(_umtx_op_args), .sy_call = (sy_call_t *)sys__umtx_op, .sy_auevent = AUE_NULL, .sy_flags = SYF_CAPENABLED, .sy_thrcnt = SY_THR_STATIC }, /* 454 = _umtx_op */
sys/sys/sysproto.h
2209
int sys__umtx_op(struct thread *, struct _umtx_op_args *);