diff --git a/[refs] b/[refs]
index af664ee99321..bd251886aebd 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: ed42c879b7b1463aa7a15fdbbeb2b1914d60be8a
+refs/heads/master: ac0811538b40bb92d339d22364026ed91dfdd147
diff --git a/trunk/fs/namespace.c b/trunk/fs/namespace.c
index 2b4635e43ae8..7fd56eeb21bf 100644
--- a/trunk/fs/namespace.c
+++ b/trunk/fs/namespace.c
@@ -847,6 +847,7 @@ static void expire_mount(struct vfsmount *mnt, struct list_head *mounts)
 
 		/* delete from the namespace */
 		list_del_init(&mnt->mnt_list);
+		mnt->mnt_namespace = NULL;
 		detach_mnt(mnt, &old_nd);
 		spin_unlock(&vfsmount_lock);
 		path_release(&old_nd);