[patch 06/12] xfs: add the xlog_grant_head structure

[Ben Myers]

On Mon, Dec 12, 2011 at 09:13:53AM -0500, Christoph Hellwig wrote:
> Add a new data structure to allow sharing code between the log grant and
> regrant code.

Each xlog_grant_head structure contains the three related items
currently defined separately for each of the reserve and write grant
heads in the log. 

Looks good.

Reviewed-by: Ben Myers <bpm at sgi.com>