switch the block layer to use kmap_local_page v2

[Martin K. Petersen]

Christoph,

> this series switches the core block layer code and all users of the
> existing bvec kmap helpers to use kmap_local_page.  Drivers that
> currently use open coded kmap_atomic calls will converted in a follow
> on series.

Looks OK to me.

Reviewed-by: Martin K. Petersen <martin.petersen at oracle.com>

-- 
Martin K. Petersen	Oracle Linux Engineering