[PATCH] Add ext2/3/4-specific _check_extN_filesystem function

[Christoph Hellwig]

On Wed, Aug 26, 2009 at 10:05:33PM -0400, Theodore Tso wrote:
> Sorry, work has gotten busy and I'm trying to get some last patches
> whipped into shape before the merge window opens.  I probably won't
> have time to look at this for at least a week or two.  So if you want
> to merge this version in for now, I'll try to clean it up when I have
> a chance.

Ok, I've put it in now.