From: Jens Axboe <axboe@fb.com>
Date: Wed, 30 Apr 2014 19:43:56 +0000 (-0600)
Subject: blk-mq: refactor request insertion/merging
X-Git-Tag: omap-for-v3.16/fixes-against-rc1~39^2~49^2~52
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c6d600c6;p=pandora-kernel.git

blk-mq: refactor request insertion/merging

Refactor the logic around adding a new bio to a software queue,
so we nest the ctx->lock where we really need it (merge and
insertion) and don't hold it when we don't (init and IO start
accounting).

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