Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758180AbaGOUKu (ORCPT ); Tue, 15 Jul 2014 16:10:50 -0400 Received: from terminus.zytor.com ([198.137.202.10]:58481 "EHLO mail.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756546AbaGOUKs (ORCPT ); Tue, 15 Jul 2014 16:10:48 -0400 Message-ID: <53C58A9C.6070906@zytor.com> Date: Tue, 15 Jul 2014 13:10:04 -0700 From: "H. Peter Anvin" User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.6.0 MIME-Version: 1.0 To: Andy Lutomirski , Toshi Kani CC: Thomas Gleixner , Ingo Molnar , Andrew Morton , Arnd Bergmann , Konrad Rzeszutek Wilk , plagnioj@jcrosoft.com, tomi.valkeinen@ti.com, "linux-mm@kvack.org" , "linux-kernel@vger.kernel.org" , Stefan Bader , Dave Airlie , Borislav Petkov Subject: Re: [RFC PATCH 0/11] Support Write-Through mapping on x86 References: <1405452884-25688-1-git-send-email-toshi.kani@hp.com> In-Reply-To: X-Enigmail-Version: 1.6 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 07/15/2014 12:53 PM, Andy Lutomirski wrote: > > Note that MTRRs are already partially deprecated: all drivers *should* > be using arch_phys_wc_add, not mtrr_add, and arch_phys_wc_add is a > no-op on systems with working PAT. > > Unfortunately, I never finished excising mtrr_add. Finishing the job > wouldn't be very hard. > The use of MTRRs in drivers is separate from the MTRR global setup done by the firmware, though. -hpa -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/