Hi Dan,

On Wed, 06 May 2015 16:04:59 -0400 Dan Williams <dan.j.williams@intel.com> wrote:
>
> diff --git a/include/asm-generic/pfn.h b/include/asm-generic/pfn.h
> new file mode 100644
> index 000000000000..91171e0285d9
> --- /dev/null
> +++ b/include/asm-generic/pfn.h
> @@ -0,0 +1,51 @@
> +#ifndef __ASM_PFN_H
> +#define __ASM_PFN_H
> +
> +#ifndef __pfn_to_phys
> +#define __pfn_to_phys(pfn)      ((dma_addr_t)(pfn) << PAGE_SHIFT)

Why dma_addr_t and not phys_addr_t?  i.e. it could use a comment if it
is correct.
-- 
Cheers,
Stephen Rothwell                    sfr@canb.auug.org.au