linux-kernel - Re: [PATCH 1/4] block: make __blk_rq_prep

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Message-ID: <20100827175711.GB23680@redhat.com>
Date:	Fri, 27 Aug 2010 13:57:11 -0400
From:	Mike Snitzer <snitzer@...hat.com>
To:	Tejun Heo <tj@...nel.org>
Cc:	jaxboe@...ionio.com, k-ueda@...jp.nec.com, j-nomura@...jp.nec.com,
	jamie@...reable.org, linux-kernel@...r.kernel.org,
	linux-fsdevel@...r.kernel.org, linux-raid@...r.kernel.org,
	hch@....de
Subject: Re: [PATCH 1/4] block: make __blk_rq_prep_clone() copy most command
 flags

On Fri, Aug 27 2010 at  1:10pm -0400,
Tejun Heo <tj@...nel.org> wrote:

> Currently __blk_rq_prep_clone() copies only REQ_WRITE and REQ_DISCARD.
> There's no reason to omit other command flags and REQ_FUA needs to be
> copied to implement FUA support in request-based dm.
> 
> REQ_COMMON_MASK which specifies flags to be copied from bio to request
> already identifies all the command flags.  Define REQ_CLONE_MASK to be
> the same as REQ_COMMON_MASK for clarity and make __blk_rq_prep_clone()
> copy all flags in the mask.
> 
> Signed-off-by: Tejun Heo <tj@...nel.org>

Looks great.

Acked-by: Mike Snitzer <snitzer@...hat.com>
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