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Date:   Fri, 3 May 2019 12:36:55 +0100
From:   Catalin Marinas <>
To:     Christoph Hellwig <>
Cc:     Robin Murphy <>,
        Joerg Roedel <>,
        Will Deacon <>,
        Tom Lendacky <>,,,
Subject: Re: [PATCH 02/25] dma-mapping: add a Kconfig symbol to indicated
 arch_dma_prep_coherent presence

On Tue, Apr 30, 2019 at 06:51:51AM -0400, Christoph Hellwig wrote:
> Add a Kconfig symbol that indicates an architecture provides a
> arch_dma_prep_coherent implementation, and provide a stub otherwise.
> This will allow the generic dma-iommu code to use it while still
> allowing to be built for cache coherent architectures.
> Signed-off-by: Christoph Hellwig <>
> Reviewed-by: Robin Murphy <>

Acked-by: Catalin Marinas <>

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