Symbol: sys_mq_unlink
sys/kern/init_sysent.c
529
{ AS(mq_unlink_args), 4, (sy_call_t *)sys_mq_unlink }, /* 512 = mq_unlink */
sys/sys/sysproto.h
1746
int sys_mq_unlink (struct sysmsg *sysmsg, const struct mq_unlink_args *);