[PATCH 07/19] xfs: verify AGFL blocks as they are read from disk

[Christoph Hellwig]

On Tue, Oct 09, 2012 at 02:50:58PM +1100, Dave Chinner wrote:
> From: Dave Chinner <dchinner at redhat.com>
> 
> Add an AGFL block verify callback function and pass it into the
> buffer read functions. Add a debug only check for valid block
> numbers in the AGFL.

The check isn't executed only for debug builds, but rather all
the time.  I'm not sure that this actually is a good idea.