From: Jens Axboe <axboe@fb.com>
Date: Wed, 29 Oct 2014 17:18:26 +0000 (-0600)
Subject: blk-mq: add BLK_MQ_F_DEFER_ISSUE support flag
X-Git-Tag: omap-for-v3.19/fixes-rc1~95^2~23
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e167dfb53cb85fde7b15f644e9dbef7ba31896b6;p=pandora-kernel.git

blk-mq: add BLK_MQ_F_DEFER_ISSUE support flag

Drivers can now tell blk-mq if they take advantage of the deferred
issue through 'last' or not. If they do, don't do queue-direct
for sync IO. This is a preparation patch for the nvme conversion.

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