From 2763c4a9410da465c4816f4e93ef76e4669493ca Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Tue, 7 Apr 2009 12:21:18 -0400
Subject: [PATCH] --- yaml --- r: 147813 b: refs/heads/master c:
 dd5cae6e9772ecc62fd374f7a8ec10eb51c96c4d h: refs/heads/master i:   147811:
 dd3f01c9ebef4019e94ec38d0c9830ca156c2fe0 v: v3

---
 [refs]               | 2 +-
 trunk/fs/namespace.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/[refs] b/[refs]
index f85061e85d9b..4b3bbff26657 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 5b857119538daac7118c1364d7ff3613f12b84d3
+refs/heads/master: dd5cae6e9772ecc62fd374f7a8ec10eb51c96c4d
diff --git a/trunk/fs/namespace.c b/trunk/fs/namespace.c
index 134d494158d9..88a904d5aa23 100644
--- a/trunk/fs/namespace.c
+++ b/trunk/fs/namespace.c
@@ -1698,7 +1698,7 @@ int do_add_mount(struct vfsmount *newmnt, struct path *path,
 	       follow_down(&path->mnt, &path->dentry))
 		;
 	err = -EINVAL;
-	if (!check_mnt(path->mnt))
+	if (!(mnt_flags & MNT_SHRINKABLE) && !check_mnt(path->mnt))
 		goto unlock;
 
 	/* Refuse the same filesystem on the same mount point */