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

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Date:   Wed, 15 Sep 2021 09:48:27 +0200
From:   Christoph Hellwig <hch@....de>
To:     guoren@...nel.org
Cc:     anup.patel@....com, atish.patra@....com, palmerdabbelt@...gle.com,
        christoph.muellner@...ll.eu, philipp.tomsich@...ll.eu, hch@....de,
        liush@...winnertech.com, wefu@...hat.com, lazyparser@...il.com,
        drew@...gleboard.org, linux-riscv@...ts.infradead.org,
        linux-kernel@...r.kernel.org, taiten.peng@...onical.com,
        aniket.ponkshe@...onical.com, heinrich.schuchardt@...onical.com,
        gordan.markus@...onical.com, Guo Ren <guoren@...ux.alibaba.com>
Subject: Re: [RFC PATCH V4 3/6] RISC-V: Support a new config option for
 non-coherent DMA

On Sat, Sep 11, 2021 at 05:21:36PM +0800, guoren@...nel.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.