From mboxrd@z Thu Jan  1 00:00:00 1970
From: Mike Snitzer <snitzer@redhat.com>
Subject: Re: use WRITE_FLUSH instead of REQ_FLUSH
Date: Mon, 7 Jan 2013 09:23:49 -0500
Message-ID: <20130107142348.GA5097@redhat.com>
References: <Pine.LNX.4.64.1301070009230.7490@file.rdu.redhat.com>
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To: Mikulas Patocka <mpatocka@redhat.com>
Cc: dm-devel@redhat.com, "Kasatkin, Dmitry" <dmitry.kasatkin@intel.com>, "Alasdair G. Kergon" <agk@redhat.com>
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On Mon, Jan 07 2013 at 12:12am -0500,
Mikulas Patocka <mpatocka@redhat.com> wrote:

> Hi Alasdair
> 
> Please push this patch to 3.8 kernel. (I already sent it before, but it 
> was forgotten somehow).
> 
> Mikulas
> 
> ---
> 
> dm-bufio: use WRITE_FLUSH instead of REQ_FLUSH
> 
> Use WRITE_FLUSH instead of REQ_FLUSH to make it consistent with the rest
> of the kernel. There is no functional change - the kernel accepts either
> WRITE_FLUSH or REQ_FLUSH.

Well the important distinction is the flush bio is originating in
dm-bufio whereas other DM targets that test for REQ_FLUSH are just
passing the flush through.  Saying as much makes the need for this patch
more explicit.