Re: [PATCH] microblaze: Wire CMA allocator

[Christoph Hellwig]

On Tue, Jan 14, 2020 at 12:57:28PM +0100, Michal Simek wrote:
> Based on commit 04e3543e228f ("microblaze: use the generic dma coherent remap allocator")
> CMA can be easily enabled by calling dma_contiguous_reserve() at the end of
> mmu_init(). High limit is end of lowmem space which is completely unused at
> this point of time.
> 
> Signed-off-by: Michal Simek <michal.simek@xxxxxxxxxx>
> ---
> 
> Christoph: Can you please review this patch?

Looks sensible to me.  If you touch this area anyway I have a request,
though:

> +++ b/arch/microblaze/include/asm/Kbuild
> @@ -7,6 +7,7 @@ generic-y += bugs.h
>  generic-y += compat.h
>  generic-y += device.h
>  generic-y += div64.h
> +generic-y += dma-contiguous.h

Can you add a prep patch to add a

mandatory-y += dma-contiguous.h

to include/asm-generic/Kbuild and remove the generic-y in all the
arch files?  That reduces the arch churn a little.