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Date: Wed, 4 Oct 2017 11:06:31 +0200
From: "'Christoph Hellwig'" <hch@lst.de>
To: David Laight <David.Laight@ACULAB.COM>
Cc: "'Christoph Hellwig'" <hch@lst.de>,
        "iommu@lists.linux-foundation.org" <iommu@lists.linux-foundation.org>,
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Subject: Re: [PATCH 04/11] ia64: make dma_cache_sync a no-op
Message-ID: <20171004090631.GA23669@lst.de>
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On Wed, Oct 04, 2017 at 08:59:24AM +0000, David Laight wrote:
> Are you sure about this one?

Yes.  And if you are not you haven't read either of the cover letter,
the DMA-API documentation, or the reply from Thomas to your mail
yesterday.