From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754623AbYGaLaI (ORCPT ); Thu, 31 Jul 2008 07:30:08 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753565AbYGaL3r (ORCPT ); Thu, 31 Jul 2008 07:29:47 -0400 Received: from mx2.mail.elte.hu ([157.181.151.9]:41924 "EHLO mx2.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753237AbYGaL3q (ORCPT ); Thu, 31 Jul 2008 07:29:46 -0400 Date: Thu, 31 Jul 2008 13:29:28 +0200 From: Ingo Molnar To: Jesse Barnes Cc: linux-kernel@vger.kernel.org, the arch/x86 maintainers , Arjan van de Ven , Yinghai Lu , greg@kroah.com Subject: Re: [bug] PCI hotplug, ibmphp_access_ebda: WARNING: at arch/x86/mm/ioremap.c:182 __ioremap_caller+0x2d1/0x340() Message-ID: <20080731112928.GC24030@elte.hu> References: <20080726131512.GA29472@elte.hu> <200807281531.32640.jbarnes@virtuousgeek.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200807281531.32640.jbarnes@virtuousgeek.org> User-Agent: Mutt/1.5.18 (2008-05-17) X-ELTE-VirusStatus: clean X-ELTE-SpamScore: -1.5 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-1.5 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.2.3 -1.5 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Jesse Barnes wrote: > On Saturday, July 26, 2008 6:15 am Ingo Molnar wrote: > > FYI, -tip testing triggered the new warning below on a testbox. I > > suspect it's related to recent commits in drivers/pci/hotplug/. > > I'm wondering, why does a driver map the EBDA? That's a really lowlevel > > thing. > > AFAICT, this driver digs around in there for hotplug controller > configuration (cc'ing Greg since he appears to be one of the original > authors). It's a custom platform driver too, that may be the only > method available there. Is there a shadow copy of the EDBA somewhere > we should be using instead? not that i know of, but it could be provided i guess. Enumerating and making all hw configuration data available reliably would be a plus i guess. Ingo