From: Miao Xie <miaox@cn.fujitsu.com>
Date: Thu, 24 Jul 2014 03:37:10 +0000 (+0800)
Subject: Btrfs: make the device lock and its protected data in the same cacheline
X-Git-Tag: fixes-against-v3.18-rc2~120^2~91
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d5ee37bcb1dff9c1d1cac5f7e5752309f1ff66b6;p=pandora-kernel.git

Btrfs: make the device lock and its protected data in the same cacheline

The lock in btrfs_device structure was far away from its protected data, it would
make CPU load the cache line twice when we accessed them, move them together.

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Chris Mason <clm@fb.com>
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