linux-kernel - Re: [PATCH v5 3/9] dma-mapping: add dma_{map,unmap}

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Date:	Mon, 7 Mar 2016 23:38:47 -0800
From:	Christoph Hellwig <hch@...radead.org>
To:	Niklas S??derlund <niklas.soderlund+renesas@...natech.se>
Cc:	vinod.koul@...el.com, linux-renesas-soc@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	dmaengine@...r.kernel.org, iommu@...ts.linux-foundation.org,
	robin.murphy@....com, laurent.pinchart@...asonboard.com,
	geert+renesas@...der.be, linus.walleij@...aro.org,
	dan.j.williams@...el.com, arnd@...db.de, linux-arch@...r.kernel.org
Subject: Re: [PATCH v5 3/9] dma-mapping: add dma_{map,unmap}_resource

Please add some documentation on where/how this should be used.  It's
not a very obvious interface.