From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760818AbYESNpX (ORCPT ); Mon, 19 May 2008 09:45:23 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754674AbYESNpG (ORCPT ); Mon, 19 May 2008 09:45:06 -0400 Received: from bzq-179-150-194.static.bezeqint.net ([212.179.150.194]:15063 "EHLO il.qumranet.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752350AbYESNpF (ORCPT ); Mon, 19 May 2008 09:45:05 -0400 Message-ID: <4831845F.6030904@qumranet.com> Date: Mon, 19 May 2008 16:45:03 +0300 From: Avi Kivity User-Agent: Thunderbird 2.0.0.14 (X11/20080501) MIME-Version: 1.0 To: Ingo Molnar CC: Andrew Morton , linux-kernel@vger.kernel.org, Sam Ravnborg Subject: Re: [PATCH] Make LIST_POISON less deadly References: <1211125094-32167-1-git-send-email-avi@qumranet.com> <20080519130151.GE13546@elte.hu> In-Reply-To: <20080519130151.GE13546@elte.hu> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Ingo Molnar wrote: > i'd suggest to add an ARCH_ILLEGAL_POINTER define instead, which > defaults to zero and gets added to pointer-ish poison values. That makes > it both simpler and also it does not need any include/asm changes > because ARCH_ILLEGAL_POINTER can be set from the Kconfig space. > Any idea how to override a value in Kconfig? We can do it for bool values but not strings. e.g. lib/Kconfig: config ILLEGAL_POINTER_VALUE hex default 0 arch/x86/Kconfig: config X86 select ILLEGAL_POINTER_VALUE=0x80000000000000000000000000 if X86_64 ? I could do it with a boolean signifying existence and a hex for the value, but I'd rather not. -- error compiling committee.c: too many arguments to function