From 6f1fed775316d58ba356b2ce62de600ad00f003a Mon Sep 17 00:00:00 2001
From: Josef Bacik <jbacik@fusionio.com>
Date: Wed, 26 Sep 2012 11:07:06 -0400
Subject: [PATCH] Btrfs: don't lookup csums for prealloc extents

The tree logging stuff was looking up csums to copy over for prealloc
extents which is just work we don't need to be doing.  Thanks,

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