From: Christoph Hellwig <hch@lst.de>
Date: Tue, 15 Apr 2014 20:14:00 +0000 (-0600)
Subject: blk-mq: split out tag initialization, support shared tags
X-Git-Tag: omap-for-v3.16/fixes-against-rc1~39^2~47^2~68
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=24d2f90309b23f2cfe016b2aebc5f0d6e01c57fd;p=pandora-kernel.git

blk-mq: split out tag initialization, support shared tags

Add a new blk_mq_tag_set structure that gets set up before we initialize
the queue.  A single blk_mq_tag_set structure can be shared by multiple
queues.

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

Modular export of blk_mq_{alloc,free}_tagset added by me.

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