linux-kernel - Re: [PATCH 5/7] dma-mapping: Provide CONFIG_ARCH_DMA_DEFAULT

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Message-ID: <20230221175842.GD15247@lst.de>
Date:   Tue, 21 Feb 2023 18:58:42 +0100
From:   Christoph Hellwig <hch@....de>
To:     Jiaxun Yang <jiaxun.yang@...goat.com>
Cc:     linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, tsbogend@...ha.franken.de,
        mpe@...erman.id.au, paul.walmsley@...ive.com, palmer@...belt.com,
        robh+dt@...nel.org, hch@....de, m.szyprowski@...sung.com,
        robin.murphy@....com
Subject: Re: [PATCH 5/7] dma-mapping: Provide
 CONFIG_ARCH_DMA_DEFAULT_COHERENT

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.