Subject: Re: [PATCH v2 3/5] dma-mapping: Provide CONFIG_ARCH_DMA_DEFAULT_COHERENT

From: Christoph Hellwig <[email-masked]>
Date: Wed, 1 Mar 2023 14:03:45 +0100

> +config ARCH_DMA_DEFAULT_COHERENT
> +	bool

Please add a comment here explaining when an architecture should
ѕelect this symbol.