MNT_UNBINDABLE    140 fs/pnode.c     			mnt->mnt_flags |= MNT_UNBINDABLE;
MNT_UNBINDABLE    142 fs/pnode.c     			mnt->mnt_flags &= ~MNT_UNBINDABLE;
MNT_UNBINDABLE     18 fs/pnode.h     #define IS_MNT_UNBINDABLE(mnt) (mnt->mnt_flags & MNT_UNBINDABLE)