From: Miao Xie <miaox@cn.fujitsu.com>
Date: Tue, 15 Jan 2013 06:27:25 +0000 (+0000)
Subject: Btrfs: Add ACCESS_ONCE() to transaction->abort accesses
X-Git-Tag: v3.8-rc5~1^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8d25a086eb104297e3ba1fdd180b04cfaaa84797;p=pandora-kernel.git

Btrfs: Add ACCESS_ONCE() to transaction->abort accesses

We may access and update transaction->aborted on the different CPUs without
lock, so we need ACCESS_ONCE() wrapper to prevent the compiler from creating
unsolicited accesses and make sure we can get the right value.

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