From: Arne Jansen <sensille@gmx.net>
Date: Sat, 25 Feb 2012 08:09:30 +0000 (+0100)
Subject: btrfs: fix race in reada
X-Git-Tag: v3.4-rc5~6^2~24
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8c9c2bf7a3c4f7e9d158c0be9c49f372fb943ad2;p=pandora-kernel.git

btrfs: fix race in reada

When inserting into the radix tree returns EEXIST, get the existing
entry without giving up the spinlock in between.
There was a race for both the zones trees and the extent tree.

Signed-off-by: Arne Jansen <sensille@gmx.net>
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Reading git-diff-tree failed