Re: bdev->bd_inode_backing_dev_info?

[Christoph Hellwig]

On Mon, Sep 14, 2009 at 11:41:19AM +0200, Jens Axboe wrote:
> Hi,
> 
> This looks a bit odd, what is the purpose of that? It also appears
> currently to be unused, it's never set to anything but NULL.

It was introduced in:

commit 520808bf20e90fdbdb320264ba7dd5cf9d47dcac
Author: Andrew Morton <akpm@xxxxxxxx>
Date:   Fri May 21 00:46:17 2004 -0700

    [PATCH] block device layer: separate backing_dev_info infrastructure

and already never set in that commit.

I'd say nuke it.
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