[PATCH 02/19] xfs: make buffer read verication an IO completion function

[Christoph Hellwig]

On Tue, Oct 09, 2012 at 02:50:53PM +1100, Dave Chinner wrote:
> From: Dave Chinner <dchinner at redhat.com>
> 
> Rather than have to detect if the buffer has just been read from
> disk by futzing with buffer state, supply the read functions with a
> verification callback and attach that to the buffer to be run if the
> buffer has to be read from disk into memory.
> 
> If the verify function fails, then the buffer will be marked with an
> EFSCORRUPTED error to indicate that the buffer did not pass
> verification and should be considered tainted.

The commit message seems to be a bit confusing for a patch that does
nothing but adding a function pointer to the read functions which isn't
set yet.  I suspect it should have a description what's actually going
on just in this patch as well, and just mention the above as the purpose
for it.

Otherwise looks fine,

Reviewed-by: Christoph Hellwig <hch at lst.de>