Symbol: sys_mq_open
sys/kern/init_sysent.c
527
{ AS(mq_open_args), 4, (sy_call_t *)sys_mq_open }, /* 510 = mq_open */
sys/sys/sysproto.h
1744
int sys_mq_open (struct sysmsg *sysmsg, const struct mq_open_args *);