From mboxrd@z Thu Jan  1 00:00:00 1970
Date: Sat, 9 Jan 2016 00:04:26 -0800
From: Christoph Hellwig <hch@infradead.org>
To: mchristi@redhat.com
Cc: linux-f2fs-devel@lists.sourceforge.net, linux-ext4@vger.kernel.org,
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Subject: Re: [PATCH 34/35] block: add QUEUE_FLAGs for flush and fua
Message-ID: <20160109080426.GA6207@infradead.org>
References: <1452027218-32303-1-git-send-email-mchristi@redhat.com>
 <1452027218-32303-35-git-send-email-mchristi@redhat.com>
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On Tue, Jan 05, 2016 at 02:53:37PM -0600, mchristi@redhat.com wrote:
> From: Mike Christie <mchristi@redhat.com>
> 
> The last patch added a REQ_OP_FLUSH for request_fn drivers
> and the next patch renames REQ_FLUSH to REQ_PREFLUSH which
> will be used by file systems and make_request_fn drivers.
> 
> This leaves REQ_FLUSH/REQ_FUA defined for drivers to tell
> the block layer if flush/fua is supported. The names are
> confusing and I bet will will accidentally be used by
> people to request flushes. To avoid that, this patch adds
> QUEUE_FLAGs for flush and fua which drivers will use to
> indicate what they support.
> 
> Signed-off-by: Mike Christie <mchristi@redhat.com>

Yes, this was rather confusing before.  Looks great fix the fix for th
kbuild complaint:

Reviewed-by: Christoph Hellwig <hch@lst.de>