From 1a60a280778ff90270fc7390d9ec102f713a5a29 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sat, 22 Mar 2008 16:19:49 -0400
Subject: [PATCH] [PATCH] lock exclusively in collect_mounts() and
 drop_collected_mounts()

Taking namespace_sem shared there isn't worth the trouble, especially with
vfsmount ID allocation about to be added.  That way we know that umount_tree(),
copy_tree() and clone_mnt() are _always_ serialized by namespace_sem.
umount_tree() still needs vfsmount_lock (it manipulates hash chains, among
other things), but that's a separate story.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
Reading git-format-patch failed