Symbol: MNTSCAN_NOUNLOCK
sys/kern/vfs_cache.c
1597
MNTSCAN_NOUNLOCK);
sys/kern/vfs_cache.c
4037
MNTSCAN_FORWARD | MNTSCAN_NOBUSY | MNTSCAN_NOUNLOCK);
sys/kern/vfs_mount.c
742
int dounlock = ((how & MNTSCAN_NOUNLOCK) == 0);