From: Steven Whitehouse <swhiteho@redhat.com>
Date: Wed, 8 Nov 2006 15:26:54 +0000 (-0500)
Subject: [GFS2] Fix page lock/glock deadlock
X-Git-Tag: v2.6.20-rc1~145^2^2~5^2~41
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2ca99501fa5422e84f18333918a503433449e2b5;p=pandora-kernel.git

[GFS2] Fix page lock/glock deadlock

This fixes a race between the glock and the page lock encountered
during truncate in gfs2_readpage and gfs2_prepare_write. The gfs2_readpages
function doesn't need the same fix since it only uses a try lock anyway, so
it will fail back to gfs2_readpage in the case of a potential deadlock.

This bug was spotted by Russell Cattelan.

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