From: Miao Xie <miaox@cn.fujitsu.com>
Date: Thu, 25 Jul 2013 11:22:33 +0000 (+0800)
Subject: Btrfs: add branch prediction hints in the read page end IO function
X-Git-Tag: v3.12-rc1~40^2~93
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f2a09da9d0cba17ad4041e7e54f1ca840b12d0be;p=pandora-kernel.git

Btrfs: add branch prediction hints in the read page end IO function

This patch add some branch prediction hints into the end IO function
of the read page, it reduced the percentage of the branch misses from
5.5% to 4.9%.

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
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