linux-kernel - Re: PM/hibernate swapfile regression

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Date:	Tue, 21 Jul 2009 17:55:36 -0400
From:	Christoph Hellwig <hch@...radead.org>
To:	Alan Jenkins <alan-jenkins@...fmail.co.uk>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	linux-kernel@...r.kernel.org,
	Hans-Joachim Picht <hans@...ux.vnet.ibm.com>,
	pm list <linux-pm@...ts.linux-foundation.org>,
	Arnd Schneider <arnd@...ibm.com>, linux-fsdevel@...r.kernel.org
Subject: Re: PM/hibernate swapfile regression

On Tue, Jul 21, 2009 at 11:50:29AM +0100, Alan Jenkins wrote:
> +struct block_device *bdcopy(struct block_device *bdev)
> +{
> +	atomic_inc(&bdev->bd_inode->i_count);
> +	return bdev;
> +}
> +
> +EXPORT_SYMBOL(bdcopy);

The function name doesn't make any sense.  You don't copy anything
here, but you grab a reference to it.  A better name would be bdgrab,
mirroing the names of functions like igrab.  A kerneldoc comment
documenting it would also be very helpful.

Why do you export it?  The swapfile code is not actually modular.

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