linux-kernel - Re: [PATCH 4/5] block: make blkdev_get/put() handle exclusive access

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Message-ID: <20101109103620.GA18355@infradead.org>
Date:	Tue, 9 Nov 2010 05:36:20 -0500
From:	Christoph Hellwig <hch@...radead.org>
To:	Tejun Heo <tj@...nel.org>
Cc:	Christoph Hellwig <hch@...radead.org>, axboe@...nel.dk,
	linux-kernel@...r.kernel.org, petero2@...ia.com,
	schwidefsky@...ibm.com, heiko.carstens@...ibm.com, jack@...e.cz,
	akpm@...ux-foundation.org, adilger.kernel@...ger.ca, tytso@....edu,
	mfasheh@...e.com, joel.becker@...cle.com, aelder@....com,
	dm-devel@...hat.com, drbd-dev@...ts.linbit.com, neilb@...e.de,
	leochen@...adcom.com, sbranden@...adcom.com,
	chris.mason@...cle.com, swhiteho@...hat.com,
	shaggy@...ux.vnet.ibm.com, joern@...fs.org,
	konishi.ryusuke@....ntt.co.jp, reiserfs-devel@...r.kernel.org,
	viro@...iv.linux.org.uk
Subject: Re: [PATCH 4/5] block: make blkdev_get/put() handle exclusive access

On Tue, Nov 09, 2010 at 11:34:06AM +0100, Tejun Heo wrote:
> So, after the above points, I decided to keep @mode.  It is a bit
> awkward but the other way didn't seem too hip either.  Any better
> ideas?

Let's keep it for now and revisit it later.

> That will make the number of functions multiplied by two -
> blkdev_get_by_path_stacked() and blkdev_get_by_dev_stacked().  The
> symlinking for stacked drivers is an oddball feature which is and will
> be only used by md and dm.  So, I think it's better to keep it
> separate and oddball.

Oh well.  I still don't like it, but let keeps it simple to make
progress for now.

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