Symbol: MNT_EXTENDED_SHARED
sys/kern/vfs_lookup.c
840
return (!MNT_EXTENDED_SHARED(mp));
sys/kern/vfs_vnops.c
533
!MNT_EXTENDED_SHARED(vp->v_mount)) &&
sys/kern/vfs_vnops.c
577
lock_flags = vp->v_type != VFIFO && MNT_EXTENDED_SHARED(vp->v_mount) ?