From: Theodore Ts'o <tytso@mit.edu>
Date: Thu, 27 Dec 2012 06:42:48 +0000 (-0500)
Subject: ext4: lock i_mutex when truncating orphan inodes
X-Git-Tag: v3.2.47~56
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=547bb54d9d41a867765cb414754472a437ad279f;p=pandora-kernel.git

ext4: lock i_mutex when truncating orphan inodes

commit 721e3eba21e43532e438652dd8f1fcdfce3187e7 upstream.

Commit c278531d39 added a warning when ext4_flush_unwritten_io() is
called without i_mutex being taken.  It had previously not been taken
during orphan cleanup since races weren't possible at that point in
the mount process, but as a result of this c278531d39, we will now see
a kernel WARN_ON in this case.  Take the i_mutex in
ext4_orphan_cleanup() to suppress this warning.

Reported-by: Alexander Beregalov <a.beregalov@gmail.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Reviewed-by: Zheng Liu <wenqing.lz@taobao.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

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