From: Jens Axboe <axboe@fb.com>
Date: Fri, 6 Jun 2014 13:57:37 +0000 (-0600)
Subject: block: add blk_rq_set_block_pc()
X-Git-Tag: omap-for-v3.16/fixes-against-rc1~56^2~10
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f27b087b81b70513b8c61ec20596c868f7b93474;p=pandora-kernel.git

block: add blk_rq_set_block_pc()

With the optimizations around not clearing the full request at alloc
time, we are leaving some of the needed init for REQ_TYPE_BLOCK_PC
up to the user allocating the request.

Add a blk_rq_set_block_pc() that sets the command type to
REQ_TYPE_BLOCK_PC, and properly initializes the members associated
with this type of request. Update callers to use this function instead
of manipulating rq->cmd_type directly.

Includes fixes from Christoph Hellwig <hch@lst.de> for my half-assed
attempt.

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