From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christoph Hellwig Subject: Re: [PATCH 2/5] dma-mapping: consolidate dma_{alloc,free}_noncoherent Date: Thu, 13 Aug 2015 19:55:41 +0200 Message-ID: <20150813175541.GA21103@lst.de> References: <1439478248-15183-1-git-send-email-hch@lst.de> <1439478248-15183-3-git-send-email-hch@lst.de> <20150813152040.GQ7557@n2100.arm.linux.org.uk> Mime-Version: 1.0 Return-path: Content-Disposition: inline In-Reply-To: <20150813152040.GQ7557@n2100.arm.linux.org.uk> Sender: linux-ia64-owner@vger.kernel.org List-ID: Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Russell King - ARM Linux Cc: Christoph Hellwig , akpm@linux-foundation.org, arnd@arndb.de, catalin.marinas@arm.com, will.deacon@arm.com, ysato@users.sourceforge.jp, monstr@monstr.eu, jonas@southpole.se, cmetcalf@ezchip.com, gxt@mprc.pku.edu.cn, x86@kernel.org, linux-alpha@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, linux-mips@linux-mips.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-kernel@vger.kernel.org On Thu, Aug 13, 2015 at 04:20:40PM +0100, Russell King - ARM Linux wrote: > > -/* > > - * Dummy noncoherent implementation. We don't provide a dma_cache_sync > > - * function so drivers using this API are highlighted with build warnings. > > - */ > > I'd like a similar comment to remain after this patch explaining that we > don't support non-coherent allocations and that it'll be highlighted by > the lack of dma_cache_sync, otherwise I'm sure we'll start to get patches > to add the thing. I'll keep a modified version of this comment in the ARM dma-mapping.h in addition to an explanation near the new common dma_alloc_noncoherent definition, thanks!