From 8ad08d8a0c3823e9b06ef84c362c9361be323d2d Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sat, 16 Jan 2010 12:56:08 -0500
Subject: [PATCH] may_umount() needs namespace_sem

otherwise it races with clone_mnt() changing mnt_share/mnt_slaves

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