From: Christoph Hellwig <hch@lst.de>
Date: Wed, 16 Apr 2014 16:48:08 +0000 (-0600)
Subject: blk-mq: add blk_mq_delay_queue
X-Git-Tag: omap-for-v3.16/fixes-against-rc1~39^2~47^2~60
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=70f4db639c5b2479e08657392cbf3ba3cceea11c;p=pandora-kernel.git

blk-mq: add blk_mq_delay_queue

Add a blk-mq equivalent to blk_delay_queue so that the scsi layer can ask
to be kicked again after a delay.

Signed-off-by: Christoph Hellwig <hch@lst.de>

Modified by me to kill the unnecessary preempt disable/enable
in the delayed workqueue handler.

Signed-off-by: Jens Axboe <axboe@fb.com>
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