Re: [PATCH 5/7] dma-mapping: Provide CONFIG_ARCH_DMA_DEFAULT_COHERENT

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To: Jiaxun Yang <jiaxun.yang@xxxxxxxxxxx>
Subject: Re: [PATCH 5/7] dma-mapping: Provide CONFIG_ARCH_DMA_DEFAULT_COHERENT
From: Christoph Hellwig <hch@xxxxxx>
Date: Tue, 21 Feb 2023 18:58:42 +0100
Cc: linux-mips@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, linuxppc-dev@xxxxxxxxxxxxxxxx, tsbogend@xxxxxxxxxxxxxxxx, mpe@xxxxxxxxxxxxxx, paul.walmsley@xxxxxxxxxx, palmer@xxxxxxxxxxx, robh+dt@xxxxxxxxxx, hch@xxxxxx, m.szyprowski@xxxxxxxxxxx, robin.murphy@xxxxxxx
In-reply-to: <20230221124613.2859-6-jiaxun.yang@flygoat.com>
References: <20230221124613.2859-1-jiaxun.yang@flygoat.com> <20230221124613.2859-6-jiaxun.yang@flygoat.com>
User-agent: Mutt/1.5.17 (2007-11-01)

On Tue, Feb 21, 2023 at 12:46:11PM +0000, Jiaxun Yang wrote:
> Provide a kconfig option to allow arches to manipulate default
> value of dma_default_coherent in Kconfig.

I don't see the win over just doing this by setting dma_default_coherent
in the early boot code.

Follow-Ups:
- Re: [PATCH 5/7] dma-mapping: Provide CONFIG_ARCH_DMA_DEFAULT_COHERENT
  - From: Jiaxun Yang

References:
- [PATCH 0/7] MIPS DMA coherence fixes
  - From: Jiaxun Yang
- [PATCH 5/7] dma-mapping: Provide CONFIG_ARCH_DMA_DEFAULT_COHERENT
  - From: Jiaxun Yang

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