From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752087AbYLYJbl (ORCPT ); Thu, 25 Dec 2008 04:31:41 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751719AbYLYJbd (ORCPT ); Thu, 25 Dec 2008 04:31:33 -0500 Received: from pfepb.post.tele.dk ([195.41.46.236]:36982 "EHLO pfepb.post.tele.dk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751613AbYLYJbc (ORCPT ); Thu, 25 Dec 2008 04:31:32 -0500 Date: Thu, 25 Dec 2008 10:33:01 +0100 From: Sam Ravnborg To: Ingo Molnar Cc: paulmck@linux.vnet.ibm.com, linux-kernel@vger.kernel.org, tglx@linutronix.de, akpm@linux-foundation.org, ralf@linux-mips.org, kernel@wantstofly.org, hskinnemoen@atmel.com, cooloney@kernel.org, tony.luck@intel.com, geert@linux-m68k.org, zippel@linux-m68k.org, jwboyer@linux.vnet.ibm.com, mporter@kernel.crashing.org, grant.likely@secretlab.ca, paulus@samba.org, benh@kernel.crashing.org, dhowells@redhat.com, yasutake.koichi@jp.panasonic.com, lethal@linux-sh.org, hpa@zytor.com Subject: Re: [PATCH -tip] Switch arm defconfig files from CONFIG_CLASSIC_RCU to CONFIG_TREE_RCU. Message-ID: <20081225093301.GB27896@uranus.ravnborg.org> References: <1229991147545-git-send-email-paulmck@linux.vnet.ibm.com> <12299911471985-git-send-email-paulmck@linux.vnet.ibm.com> <20081223142542.GC29151@elte.hu> <20081225083611.GA14968@elte.hu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20081225083611.GA14968@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 On Thu, Dec 25, 2008 at 09:36:11AM +0100, Ingo Molnar wrote: > > below is the fix for another small buglet that hits architectures that do > not include kernel/Kconfig.preempt. What is needed to let all architectures include Kconfig.preempt? We should not advertise preemption if not supported, but we could do this by a simple Kconfig symbol: config HAVE_PREEMPT bool And let all architectures that supports preemption do: config "ARCH" select HAVE_PREEMPT But maybe there is a simpler solution Sam