From mboxrd@z Thu Jan 1 00:00:00 1970 From: hch@lst.de (Christoph Hellwig) Date: Tue, 17 Apr 2018 21:55:29 +0200 Subject: [PATCH 01/12] iommu-common: move to arch/sparc In-Reply-To: <20180416.095833.969403163564136309.davem@davemloft.net> References: <20180415145947.1248-1-hch@lst.de> <20180415145947.1248-2-hch@lst.de> <20180416.095833.969403163564136309.davem@davemloft.net> Message-ID: <20180417195529.GA31335@lst.de> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Mon, Apr 16, 2018 at 09:58:33AM -0400, David Miller wrote: > From: Anshuman Khandual > Date: Mon, 16 Apr 2018 14:26:07 +0530 > > > On 04/15/2018 08:29 PM, Christoph Hellwig wrote: > >> This code is only used by sparc, and all new iommu drivers should use the > >> drivers/iommu/ framework. Also remove the unused exports. > >> > >> Signed-off-by: Christoph Hellwig > > > > Right, these functions are used only from SPARC architecture. Simple > > git grep confirms it as well. Hence it makes sense to move them into > > arch code instead. > > Well, we put these into a common location and used type friendly for > powerpc because we hoped powerpc would convert over to using this > common piece of code as well. > > But nobody did the powerpc work. > > If you look at the powerpc iommu support, it's the same code basically > for entry allocation. I could also introduce a new config symbol and keep it in common code, but it has been there for a while without any new user. Right now it just means we built the code for everyone who selects CONFIG_IOMMU_HELPER, which is just about anyone these days.