From: Ming Lei <tom.leiming@gmail.com>
Date: Tue, 27 May 2014 15:35:14 +0000 (+0800)
Subject: block: only allocate/free mq_usage_counter in blk-mq
X-Git-Tag: omap-for-v3.16/fixes-against-rc1~39^2~49^2~21
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3d2936f457a847d9d88a9cc127e0eb7a0ebba0ff;p=pandora-kernel.git

block: only allocate/free mq_usage_counter in blk-mq

The percpu counter is only used for blk-mq, so move
its allocation and free inside blk-mq, and don't
allocate it for legacy queue device.

Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
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