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Date: Sun, 17 Sep 2017 22:22:45 -0700 From: Christoph Hellwig <hch@...radead.org> To: Huacai Chen <chenhc@...ote.com> Cc: Marek Szyprowski <m.szyprowski@...sung.com>, Robin Murphy <robin.murphy@....com>, Andrew Morton <akpm@...ux-foundation.org>, Fuxin Zhang <zhangfx@...ote.com>, linux-kernel@...r.kernel.org, stable@...r.kernel.org Subject: Re: [PATCH V5 1/3] dma-mapping: Introduce device_is_coherent() as a helper On Mon, Sep 18, 2017 at 12:21:40PM +0800, Huacai Chen wrote: > We will use device_is_coherent() as a helper function, in order to set > an appropriate dma alignment in dmapool and block queue (other patches > in this series). > > There is a MIPS-specific plat_device_is_coherent(), but we need a more > generic solution, so add and use a new function pointer in dma_map_ops. This is still missing any explanation on what this API could do with the information, and both of the callers in the series don't actually need it.
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