[PATCH review 07/11] mnt: Simplify umount_tree

[Eric W. Biederman]

Replace the open coded __detach_mnt with __detach_mnt.

Cc: stable at vger.kernel.org
Signed-off-by: "Eric W. Biederman" <ebiederm at xmission.com>
---
 fs/namespace.c | 10 +---------
 1 file changed, 1 insertion(+), 9 deletions(-)

diff --git a/fs/namespace.c b/fs/namespace.c
index c3f526ce0522..9fae55f2242e 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -1368,16 +1368,8 @@ static void umount_tree(struct mount *mnt, enum umount_tree_flags how)
 		if (how & UMOUNT_SYNC)
 			p->mnt.mnt_flags |= MNT_SYNC_UMOUNT;
 		if (mnt_has_parent(p)) {
-			hlist_del_init(&p->mnt_mp_list);
-			put_mountpoint(p->mnt_mp);
 			mnt_add_count(p->mnt_parent, -1);
-			/* move the reference to mountpoint into ->mnt_ex_mountpoint */
-			p->mnt_ex_mountpoint.dentry = p->mnt_mountpoint;
-			p->mnt_ex_mountpoint.mnt = &p->mnt_parent->mnt;
-			p->mnt_mountpoint = p->mnt.mnt_root;
-			p->mnt_parent = p;
-			p->mnt_mp = NULL;
-			hlist_del_init_rcu(&p->mnt_hash);
+			__detach_mnt(p, &p->mnt_ex_mountpoint);
 		}
 		change_mnt_propagation(p, MS_PRIVATE);
 	}
-- 
2.2.1