From mboxrd@z Thu Jan 1 00:00:00 1970 From: mail@pawelmoll.com (Pawel Moll) Date: Mon, 20 Sep 2010 12:31:35 +0100 Subject: [RFC] mmaping with VIVT cache In-Reply-To: <20100920105019.GB30793@n2100.arm.linux.org.uk> References: <589851.42712.qm@web120206.mail.ne1.yahoo.com> <20100917210649.GA18343@n2100.arm.linux.org.uk> <20100920105019.GB30793@n2100.arm.linux.org.uk> Message-ID: <289feaf81f35dca3b83a210929832c5b@cox.rootnode.net> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org > pgprot_noncached will be unsafe on ARMv6 and ARMv7 architectures when > used for mapping existing memory, as you'll be violating an architectural > restriction (having aliasing mappings of memory as 'Strongly ordered' > when there is a pre-existing 'Memory' type mapping.) > adead.org/mailman/listinfo/linux-arm-kernel Oh, I'm not concerned about it - it was a custom hack in order to get a "sh-customer" running. I've just mentioned it as an example that the problem is real and encountered by different people in different places... Pawe?