switch the block layer to use kmap_local_page v3

[Jens Axboe]

On 7/26/21 11:56 PM, Christoph Hellwig wrote:
> Hi all,
> 
> 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.
> 
> To do so a new kunmap variant is added that calls
> flush_kernel_dcache_page.  I'm not entirely sure where to call
> flush_dcache_page vs flush_kernel_dcache_page, so I've tried to follow
> the documentation here, but additional feedback would be welcome.
> 
> Note that the ps3disk has a minir conflict with the
> flush_kernel_dcache_page removal in linux-next through the -mm tree.
> I had hoped that change would go into 5.14, but it seems like it is
> being held for 5.15.

Applied for 5.15, thanks.

-- 
Jens Axboe