linux-kernel - Re: [PATCH 3/9] dma-mapping: move the remap helpers to a separate file

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Message-ID: <20181201165939.GC20912@lst.de>
Date:   Sat, 1 Dec 2018 17:59:39 +0100
From:   Christoph Hellwig <hch@....de>
To:     Robin Murphy <robin.murphy@....com>
Cc:     Christoph Hellwig <hch@....de>, iommu@...ts.linux-foundation.org,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>, Guo Ren <ren_guo@...ky.com>,
        Laura Abbott <labbott@...hat.com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/9] dma-mapping: move the remap helpers to a separate
 file

On Fri, Nov 30, 2018 at 07:05:06PM +0000, Robin Murphy wrote:
> On 05/11/2018 12:19, Christoph Hellwig wrote:
>> The dma remap code only really makes sense for not cache coherent
>> architectures,
>
> And coherent ones with highmem, presumably? That can at least be the case 
> on 32-bit Arm, where coherent LPAE systems do exist (e.g. Calxeda Midway).

Ok, I've updated the commit log.