linux-kernel - Re: [RFC PATCH] block: all callers should check blkdev_issue

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Message-ID: <20120626155115.GA17242@infradead.org>
Date:	Tue, 26 Jun 2012 11:51:15 -0400
From:	Christoph Hellwig <hch@...radead.org>
To:	Mike Snitzer <snitzer@...hat.com>
Cc:	axboe@...nel.dk, linux-kernel@...r.kernel.org,
	linux-fsdevel@...r.kernel.org, tj@...nel.org, hch@...radead.org,
	jmoyer@...hat.com, vgoyal@...hat.com, dm-devel@...hat.com
Subject: Re: [RFC PATCH] block: all callers should check blkdev_issue_flush's
 return

On Tue, Jun 26, 2012 at 11:27:25AM -0400, Mike Snitzer wrote:
> It is concerning that a FLUSH may fail but the blkdev_issue_flush
> callers assume it will always succeed.
> 
> Each blkdev_issue_flush caller should come to terms with the reality
> that a FLUSH may fail -- the file_operations' .fsync methods in
> particular.  nilfs2 is the only filesystem that checks
> blkdev_issue_flush's return.

Good spot, but it would be way better if you actually provided patches
to fix this instead of just adding more compiler warnings.

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