linux-kernel - Re: [PATCH v2 2/5] dma-mapping: Provide a fallback dma_default

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Date:   Wed, 1 Mar 2023 14:03:15 +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, linux-riscv@...ts.infradead.org
Subject: Re: [PATCH v2 2/5] dma-mapping: Provide a fallback
 dma_default_coherent

On Thu, Feb 23, 2023 at 11:36:41AM +0000, Jiaxun Yang wrote:
> dma_default_coherent was decleared unconditionally at kernel/dma/mapping.c
> but only decleared when any of non-coherent options is enabled in dma-map-ops.h.

Overly lone line here.

>  }
>  #else
> +#define dma_default_coherent true
>  static inline bool dev_is_dma_coherent(struct device *dev)

Please keep an empty line before the function declaration.