From: Shaohua Li <shaohua.li@intel.com>
Date: Tue, 22 Mar 2011 07:35:35 +0000 (+0100)
Subject: block: fix non-atomic access to genhd inflight structures
X-Git-Tag: v2.6.39-rc1~80^2~6
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1e9bb8808ac11094d711d20d580e7b45a4992d0c;p=pandora-kernel.git

block: fix non-atomic access to genhd inflight structures

After the stack plugging introduction, these are called lockless.
Ensure that the counters are updated atomically.

Signed-off-by: Shaohua Li<shaohua.li@intel.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
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