Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754939Ab0FNGiP (ORCPT ); Mon, 14 Jun 2010 02:38:15 -0400 Received: from eddie.linux-mips.org ([78.24.191.182]:51521 "EHLO eddie.linux-mips.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753213Ab0FNGiO (ORCPT ); Mon, 14 Jun 2010 02:38:14 -0400 Date: Mon, 14 Jun 2010 07:38:13 +0100 (BST) From: "Maciej W. Rozycki" To: Kenji Kaneshige cc: "H. Peter Anvin" , Thomas Gleixner , Ingo Molnar , linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, jbarnes@virtuousgeek.org Subject: Re: [PATCH 2/4] x86: ioremap: fix physical address check In-Reply-To: <4C158BCF.6000303@jp.fujitsu.com> Message-ID: References: <4C11FF10.4060203@jp.fujitsu.com> <4C11FFC0.1030006@jp.fujitsu.com> <4C1275BF.3070605@zytor.com> <4C158BCF.6000303@jp.fujitsu.com> User-Agent: Alpine 2.00 (LFD 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 603 Lines: 15 On Mon, 14 Jun 2010, Kenji Kaneshige wrote: > - Architectural limit of physical address in x86 32-bit mode is 40-bit > (depnds on processor version). According to documentation I happen to have handy this limit is actually 52 bits (and space is currently available in the data structures used for a possible future extension up to 63 bits). Maciej -- 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/