4633 	struct mount *new_mnt, *root_mnt, *old_mnt, *root_parent, *ex_parent;  in path_pivot_root()  local
4651 	root_mnt = real_mount(root.mnt);  in path_pivot_root()
4653 	root_parent = root_mnt->mnt_parent;  in path_pivot_root()
4658 	if (!check_mnt(root_mnt) || !check_mnt(new_mnt))  in path_pivot_root()
4664 	if (new_mnt == root_mnt || old_mnt == root_mnt)  in path_pivot_root()
4668 	if (!mnt_has_parent(root_mnt))  in path_pivot_root()
4682 	if (root_mnt->mnt.mnt_flags & MNT_LOCKED) {  in path_pivot_root()
4684 		root_mnt->mnt.mnt_flags &= ~MNT_LOCKED;  in path_pivot_root()
4687 	attach_mnt(new_mnt, root_parent, root_mnt->mnt_mp);  in path_pivot_root()
4688 	umount_mnt(root_mnt);  in path_pivot_root()
4690 	attach_mnt(root_mnt, old_mnt, old_mp.mp);  in path_pivot_root()
4695 	mnt_notify_add(root_mnt);  in path_pivot_root()