[PATCH 9/9] Replace log checksumming code with CRCs.

[Bill O'Donnell]

On Fri, Sep 26, 2008 at 12:56:50AM +0200, Christoph Hellwig wrote:
| From: Dave Chinner <dgc at sgi.com>
| 
| The log has debug only checksum validation; replace this with
| stronger CRCs and always use it.
| 
| So far we only checksum the payload in every log buffer.  For the final
| version this needs to be extended to include the headers, too.
| 
| 
| [hch: minor adaptions]

looks good.