Symbol: sys_umtx_wakeup
sys/kern/init_sysent.c
487
{ AS(umtx_wakeup_args), 4, (sy_call_t *)sys_umtx_wakeup }, /* 470 = umtx_wakeup */
sys/sys/sysproto.h
1705
int sys_umtx_wakeup (struct sysmsg *sysmsg, const struct umtx_wakeup_args *);