linux-kernel - Re: [PATCH v1 4/9] blk-mq: introduce init_flush_rq_fn callback in 'blk_mq

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Message-ID: <53EE3312.2070108@kernel.dk>
Date:	Fri, 15 Aug 2014 10:19:30 -0600
From:	Jens Axboe <axboe@...nel.dk>
To:	Ming Lei <ming.lei@...onical.com>, linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Dave Kleikamp <dave.kleikamp@...cle.com>
CC:	Zach Brown <zab@...bo.net>, Benjamin LaHaise <bcrl@...ck.org>,
	Christoph Hellwig <hch@...radead.org>,
	Kent Overstreet <kmo@...erainc.com>, linux-aio@...ck.org,
	linux-fsdevel@...r.kernel.org, Dave Chinner <david@...morbit.com>
Subject: Re: [PATCH v1 4/9] blk-mq: introduce init_flush_rq_fn callback in
 'blk_mq_ops'

On 08/14/2014 09:50 AM, Ming Lei wrote:
> Currently pdu of the flush rq is simlpy copied from another rq,
> it isn't enough to initialize pointer field well, so introduce
> the callback for driver to handle the case easily.

This is the only patch I don't really like. Can't we make do with
calling ->init_request() for this instead of having to add another
(weird) hook?

-- 
Jens Axboe

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