diff --git a/[refs] b/[refs]
index 9718c31b41de..326384038eac 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 6d59e7f582ef1c1988542d0fc3b36d0087b757ce
+refs/heads/master: 1a60a280778ff90270fc7390d9ec102f713a5a29
diff --git a/trunk/fs/namespace.c b/trunk/fs/namespace.c
index 678f7ce060f2..af2fb3707d0a 100644
--- a/trunk/fs/namespace.c
+++ b/trunk/fs/namespace.c
@@ -1091,20 +1091,20 @@ struct vfsmount *copy_tree(struct vfsmount *mnt, struct dentry *dentry,
 struct vfsmount *collect_mounts(struct vfsmount *mnt, struct dentry *dentry)
 {
 	struct vfsmount *tree;
-	down_read(&namespace_sem);
+	down_write(&namespace_sem);
 	tree = copy_tree(mnt, dentry, CL_COPY_ALL | CL_PRIVATE);
-	up_read(&namespace_sem);
+	up_write(&namespace_sem);
 	return tree;
 }
 
 void drop_collected_mounts(struct vfsmount *mnt)
 {
 	LIST_HEAD(umount_list);
-	down_read(&namespace_sem);
+	down_write(&namespace_sem);
 	spin_lock(&vfsmount_lock);
 	umount_tree(mnt, 0, &umount_list);
 	spin_unlock(&vfsmount_lock);
-	up_read(&namespace_sem);
+	up_write(&namespace_sem);
 	release_mounts(&umount_list);
 }