From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753664AbYASTNI (ORCPT ); Sat, 19 Jan 2008 14:13:08 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751150AbYASTM5 (ORCPT ); Sat, 19 Jan 2008 14:12:57 -0500 Received: from one.firstfloor.org ([213.235.205.2]:39768 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750929AbYASTM4 (ORCPT ); Sat, 19 Jan 2008 14:12:56 -0500 Date: Sat, 19 Jan 2008 20:16:21 +0100 From: Andi Kleen To: Ingo Molnar Cc: Andi Kleen , venkatesh.pallipadi@intel.com, suresh.b.siddha@intel.com, tglx@linutronix.de, linux-kernel@vger.kernel.org Subject: Re: ACPI early ioremap problems Message-ID: <20080119191621.GA3865@one.firstfloor.org> References: <20080119030843.GA2028@basil.nowhere.org> <20080119150328.GA32370@elte.hu> <20080119152649.GA1375@one.firstfloor.org> <20080119153055.GA12054@elte.hu> <20080119154651.GA1626@one.firstfloor.org> <20080119184543.GA3751@elte.hu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20080119184543.GA3751@elte.hu> User-Agent: Mutt/1.4.2.1i Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > hm, so are you saying that on 64-bit there's in essence no usable > ioremap facility between zap_low_mappings() and paging_init()? > (early_ioremap() is not usable anymore, and ioremap() is not yet > usable.) I guess we'll have to pick up the 32-bit early_ioremap() code > for 64-bit as well. No early_ioremap() should work. Or rather used to work. It does map into the kernel mapping which is not zapped. It just broke recently. But it definitely used to work because several users used it before paging_init() even before the recent PAT changes. -Andi