From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755081AbZBZTzV (ORCPT ); Thu, 26 Feb 2009 14:55:21 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752842AbZBZTzH (ORCPT ); Thu, 26 Feb 2009 14:55:07 -0500 Received: from moutng.kundenserver.de ([212.227.17.8]:63552 "EHLO moutng.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752649AbZBZTzG (ORCPT ); Thu, 26 Feb 2009 14:55:06 -0500 From: Arnd Bergmann To: Vinay Venkataraghavan Subject: Re: Page protection flags in linux on an x86 platform Date: Thu, 26 Feb 2009 20:54:53 +0100 User-Agent: KMail/1.9.9 Cc: linux kernel References: <356809.23263.qm@web39808.mail.mud.yahoo.com> In-Reply-To: <356809.23263.qm@web39808.mail.mud.yahoo.com> X-Face: I@=L^?./?$U,EK.)V[4*>`zSqm0>65YtkOe>TFD'!aw?7OVv#~5xd\s,[~w]-J!)|%=]>=?utf-8?q?+=0A=09=7EohchhkRGW=3F=7C6=5FqTmkd=5Ft=3FLZC=23Q-=60=2E=60Y=2Ea=5E?= =?utf-8?q?3zb?=) =?utf-8?q?+U-JVN=5DWT=25cw=23=5BYo0=267C=26bL12wWGlZi=0A=09=7EJ=3B=5Cwg?= =?utf-8?q?=3B3zRnz?=,J"CT_)=\H'1/{?SR7GDu?WIopm.HaBG=QYj"NZD_[zrM\Gip^U MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200902262054.53412.arnd@arndb.de> X-Provags-ID: V01U2FsdGVkX18Vm17PcYDAugfx0Fot5IlUdLDpexY1vIGrEII jUGixClHWytHKfmBpaTOkQE9SzwH18ADjBk+LRj6UJkV4blwt3 r1SKFUi6K5Eu2z7VdSWoA== Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thursday 26 February 2009, Vinay Venkataraghavan wrote: > I am trying to port some PPC code to x86 based linux. My question is that I am need to create some page mappings using remap_pfn_range. In the code for the PPC, > the protection flags being specified are: > > __pgprot(_PAGE_NO_CACHE | _PAGE_GUARDED); To make your code portable, use pgprot_noncached(), which works on all architectures. Arnd <><