From: Tristan Ye <tristan.ye@oracle.com>
Date: Fri, 10 Sep 2010 02:16:33 +0000 (+0800)
Subject: Ocfs2: Handle empty list in lockres_seq_start() for dlmdebug.c
X-Git-Tag: v2.6.36-rc6~36^2~6
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=228ac6357718df2d5c8d70210fa51b2225aab5ee;p=pandora-kernel.git

Ocfs2: Handle empty list in lockres_seq_start() for dlmdebug.c

This patch tries to handle the case in which list 'dlm->tracking_list' is
empty, to avoid accessing an invalid pointer. It fixes the following oops:

http://oss.oracle.com/bugzilla/show_bug.cgi?id=1287

Signed-off-by: Tristan Ye <tristan.ye@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
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