linux-kernel - Re: [PATCH 29/30] block: remove the BLKDEV_IFL

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Date:	Wed, 25 Aug 2010 17:59:20 +0200
From:	Christoph Hellwig <hch@....de>
To:	Tejun Heo <tj@...nel.org>
Cc:	jaxboe@...ionio.com, linux-kernel@...r.kernel.org,
	linux-fsdevel@...r.kernel.org, linux-scsi@...r.kernel.org,
	linux-ide@...r.kernel.org, linux-raid@...r.kernel.org, hch@....de,
	James.Bottomley@...e.de, tytso@....edu, chris.mason@...cle.com,
	swhiteho@...hat.com, konishi.ryusuke@....ntt.co.jp,
	dm-devel@...hat.com, vst@...b.net, jack@...e.cz,
	rwheeler@...hat.com, hare@...e.de, neilb@...e.de,
	rusty@...tcorp.com.au, mst@...hat.com, jeremy@...p.org,
	snitzer@...hat.com, k-ueda@...jp.nec.com,
	Christoph Hellwig <hch@...radead.org>
Subject: Re: [PATCH 29/30] block: remove the BLKDEV_IFL_BARRIER flag

On Wed, Aug 25, 2010 at 05:47:46PM +0200, Tejun Heo wrote:
> From: Christoph Hellwig <hch@...radead.org>
> 
> Remove support for barriers on discards, which is unused now.  Also
> remove the DISCARD_NOBARRIER I/O type in favour of just setting the
> rw flags up locally in blkdev_issue_discard.
> 
> tj: Also remove DISCARD_SECURE and use REQ_SECURE directly.

REQ_SECURE was just added for mmc.  I assume they plan to submit the
driver support soon.

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