[RFC PATCH V4 3/6] RISC-V: Support a new config option for non-coherent DMA

[Christoph Hellwig]

On Sat, Sep 11, 2021 at 05:21:36PM +0800, guoren at kernel.org wrote:
> +	select DMA_GLOBAL_POOL
> +	select DMA_DIRECT_REMAP

No need to select DMA_GLOBAL_POOL when DMA_DIRECT_REMAP is select.

Also a patch just to add a option that is not selected and won't build
if selected does not make sense.