Re: [PATCH v2 2/5] dma-mapping: Provide a fallback dma_default_coherent

[Christoph Hellwig]

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.