Symbol: sys_mq_notify
sys/kern/init_sysent.c
532
{ AS(mq_notify_args), 4, (sy_call_t *)sys_mq_notify }, /* 515 = mq_notify */
sys/sys/sysproto.h
1749
int sys_mq_notify (struct sysmsg *sysmsg, const struct mq_notify_args *);