linux-kernel - Re: [PATCH 2/5] dma-mapping: move the dma

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Date:   Fri, 31 Aug 2018 13:11:55 -0700
From:   Paul Burton <paul.burton@...s.com>
To:     Christoph Hellwig <hch@....de>
Cc:     iommu@...ts.linux-foundation.org,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Robin Murphy <robin.murphy@....com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-mips@...ux-mips.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/5] dma-mapping: move the dma_coherent flag to struct
 device

Hi Christoph,

On Mon, Aug 27, 2018 at 04:50:29PM +0200, Christoph Hellwig wrote:
> Various architectures support both coherent and non-coherent dma on
> a per-device basis.  Move the dma_noncoherent flag from mips the
> mips archdata field to struct device proper to prepare the
> infrastructure for reuse on other architectures.

"mips the mips"

> diff --git a/include/linux/dma-noncoherent.h b/include/linux/dma-noncoherent.h
> index a0aa00cc909d..f99748e9c08e 100644
> --- a/include/linux/dma-noncoherent.h
> +++ b/include/linux/dma-noncoherent.h
> @@ -4,6 +4,24 @@
>  
>  #include <linux/dma-mapping.h>
>  
> +#ifdef CONFIG_ARCH_HAS_DMA_COHERENCE_H
> +#include <asm/dma-coherence.h>
> +#else
> +#if defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_DEVICE) || \
> +    defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU) || \
> +    defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU_ALL)

#elif ?

Thanks,
    Paul