Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030192AbWEKIfn (ORCPT ); Thu, 11 May 2006 04:35:43 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1030193AbWEKIfm (ORCPT ); Thu, 11 May 2006 04:35:42 -0400 Received: from e35.co.us.ibm.com ([32.97.110.153]:61151 "EHLO e35.co.us.ibm.com") by vger.kernel.org with ESMTP id S1030192AbWEKIfm (ORCPT ); Thu, 11 May 2006 04:35:42 -0400 Message-ID: <4462F7F4.7050908@in.ibm.com> Date: Thu, 11 May 2006 14:08:12 +0530 From: Sachin Sant User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.12) Gecko/20051205 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Russell King CC: Sharyathi Nagesh , linux-kernel@vger.kernel.org, Arjan van de Ven Subject: Re: Bug while executing : cat /proc/iomem on 2.6.17-rc1/rc2 References: <444DFD53.2000108@in.ibm.com> <1145962096.3114.19.camel@laptopd505.fenrus.org> <1147332468.17798.13.camel@localhost.localdomain> <20060511073205.GA28693@flint.arm.linux.org.uk> In-Reply-To: <20060511073205.GA28693@flint.arm.linux.org.uk> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1282 Lines: 43 Russell King wrote: >Only the root should have a NULL parent, so this is just covering up some >other problem - you have a resource which somehow has illegally ended up >with a NULL parent pointer while it's been registered. > >Maybe try adding: > > if (p->parent == NULL) { > printk("resource with null parent: %lx-%lx: %s\n", > p->start, p->end, p->name); > break; > } > >just before the test in that loop, and then finding out why that resource >is becoming invalid. > > > I get this output in dmesg with the above code. resource with null parent: 0-57ffffff: System RAM resource with null parent: 0-57ffffff: System RAM x236:/home/sharyathi/linux-2.6.17-rc1/kernel # cat /proc/iomem 00000000-0009dbff : System RAM 0009dc00-0009ffff : reserved 000a0000-000bffff : Video RAM area 000c0000-000cafff : Video ROM 000cb000-000cc5ff : Adapter ROM 000f0000-000fffff : System ROM 00100000-c7fcb5ff : System RAM 00100000-004ff436 : Kernel code 004ff437-0068881f : Kernel data x236:/home/sharyathi/linux-2.6.17-rc1/kernel # - 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/