From mboxrd@z Thu Jan 1 00:00:00 1970 From: Arnd Bergmann Subject: Re: [PATCH 4/7] io-64-nonatomic: Add relaxed accessor variants Date: Mon, 25 Apr 2016 18:11:55 +0200 Message-ID: <6110512.c3CSTNRIy3@wuerfel> References: <44173fd4e8efd27d670cadc6b30e215243a14099.1460391217.git.robin.murphy@arm.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <44173fd4e8efd27d670cadc6b30e215243a14099.1460391217.git.robin.murphy-5wv7dgnIgG8@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org To: Robin Murphy Cc: Hitoshi Mitake , will.deacon-5wv7dgnIgG8@public.gmane.org, Christoph Hellwig , iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, tchalamarla-M3mlKVOIwJVv6pq1l3V1OdBPR1lH4CV8@public.gmane.org, brian.starkey-5wv7dgnIgG8@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, Darren Hart List-Id: iommu@lists.linux-foundation.org On Wednesday 13 April 2016 18:13:00 Robin Murphy wrote: > Whilst commit 9439eb3ab9d1 ("asm-generic: io: implement relaxed > accessor macros as conditional wrappers") makes the *_relaxed forms of > I/O accessors universally available to drivers, in cases where writeq() > is implemented via the io-64-nonatomic helpers, writeq_relaxed() will > end up falling back to writel() regardless of whether writel_relaxed() > is available (identically for s/write/read/). > > Add corresponding relaxed forms of the nonatomic helpers to delegate > to the equivalent 32-bit accessors as appropriate. > > CC: Arnd Bergmann > CC: Christoph Hellwig > CC: Darren Hart > CC: Hitoshi Mitake > Signed-off-by: Robin Murphy > --- > Acked-by: Arnd Bergmann From mboxrd@z Thu Jan 1 00:00:00 1970 From: arnd@arndb.de (Arnd Bergmann) Date: Mon, 25 Apr 2016 18:11:55 +0200 Subject: [PATCH 4/7] io-64-nonatomic: Add relaxed accessor variants In-Reply-To: <44173fd4e8efd27d670cadc6b30e215243a14099.1460391217.git.robin.murphy@arm.com> References: <44173fd4e8efd27d670cadc6b30e215243a14099.1460391217.git.robin.murphy@arm.com> Message-ID: <6110512.c3CSTNRIy3@wuerfel> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Wednesday 13 April 2016 18:13:00 Robin Murphy wrote: > Whilst commit 9439eb3ab9d1 ("asm-generic: io: implement relaxed > accessor macros as conditional wrappers") makes the *_relaxed forms of > I/O accessors universally available to drivers, in cases where writeq() > is implemented via the io-64-nonatomic helpers, writeq_relaxed() will > end up falling back to writel() regardless of whether writel_relaxed() > is available (identically for s/write/read/). > > Add corresponding relaxed forms of the nonatomic helpers to delegate > to the equivalent 32-bit accessors as appropriate. > > CC: Arnd Bergmann > CC: Christoph Hellwig > CC: Darren Hart > CC: Hitoshi Mitake > Signed-off-by: Robin Murphy > --- > Acked-by: Arnd Bergmann