From 7020933156ac2a8a7386314933e49948bf0438f7 Mon Sep 17 00:00:00 2001
From: Russell Cattelan <cattelan@redhat.com>
Date: Thu, 9 Nov 2006 11:28:08 -0500
Subject: [PATCH] [GFS2] Fix race in logging code

The log lock is dropped prior to io submittion, but
this exposes a hole in which the log data structures
may be going away due to a truncate.
Store the buffer head in a local pointer prior to
dropping the lock and relay on the buffer_head lock
for consitency on the buffer head.

Signed-Off-By: Russell Cattelan <cattelan@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
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