From mboxrd@z Thu Jan 1 00:00:00 1970 From: arnd@arndb.de (Arnd Bergmann) Date: Thu, 13 Jun 2013 14:47:35 +0200 Subject: [PATCH] ARM: optimize memset_io()/memcpy_fromio()/memcpy_toio() In-Reply-To: <20130613110501.GZ18614@n2100.arm.linux.org.uk> References: <51B76972.3040002@gmail.com> <20130613110501.GZ18614@n2100.arm.linux.org.uk> Message-ID: <2184363.o70cB30E6f@wuerfel> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Thursday 13 June 2013 12:05:02 Russell King - ARM Linux wrote: > Yes, unfortunately it should be selectable by platform, though it needs > to be done carefully. Some ARM platforms can't cope with full 32-bit > accesses to MMIO. > > I don't think any of those intersect with the single zImage project, so > those should be fine to have it always enabled - it's only the older > platforms that might have issues. Are those all StrongARM and XScale based platforms? If so, I definitely don't expect them to go multiplatform. Can we combine this with the existing CONFIG_NEED_MACH_IO_H? Arnd