From: Josef Bacik <jbacik@fusionio.com>
Date: Fri, 20 Jul 2012 20:05:36 +0000 (-0400)
Subject: Btrfs: don't return true in releasepage unless we actually freed the eb
X-Git-Tag: v3.6-rc1~81^2~10
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e64860aa05048fa7a8483ca698b17c2caf5625cf;p=pandora-kernel.git

Btrfs: don't return true in releasepage unless we actually freed the eb

I noticed while looking at an extent_buffer race that we will
unconditionally return 1 if we get down to release_extent_buffer after
clearing the tree ref.  However we can easily race in here and get a ref on
the eb and not actually free the eb.  So make release_extent_buffer return 1
if it free'd the eb and 0 if not so we can be a little kinder to the vm.
Thanks,

Signed-off-by: Josef Bacik <jbacik@fusionio.com>
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