From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752320AbZIHWJm (ORCPT ); Tue, 8 Sep 2009 18:09:42 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752039AbZIHWJl (ORCPT ); Tue, 8 Sep 2009 18:09:41 -0400 Received: from e9.ny.us.ibm.com ([32.97.182.139]:41744 "EHLO e9.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751168AbZIHWJk (ORCPT ); Tue, 8 Sep 2009 18:09:40 -0400 Date: Tue, 8 Sep 2009 15:09:43 -0700 From: "Paul E. McKenney" To: Valdis.Kletnieks@vt.edu Cc: Roman Zippel , Andrew Morton , linux-kernel@vger.kernel.org, linux-kbuild@vger.kernel.org Subject: Re: Odd Kconfig output.. Message-ID: <20090908220943.GJ6753@linux.vnet.ibm.com> Reply-To: paulmck@linux.vnet.ibm.com References: <12284.1252155974@turing-police.cc.vt.edu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <12284.1252155974@turing-police.cc.vt.edu> User-Agent: Mutt/1.5.15+20070412 (2007-04-11) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat, Sep 05, 2009 at 09:06:14AM -0400, Valdis.Kletnieks@vt.edu wrote: > Saw this while doing a 'make oldconfig' moving from -mmotm0827 to -mmotm0903: > > RCU Implementation > > 1. Tree-based hierarchical RCU (TREE_RCU) > 2. Preemptable tree-based hierarchical RCU (TREE_PREEMPT_RCU) (NEW) > choice[1-2]: ? > > There is no help available for this kernel option. > Prompt: RCU Implementation > Defined at init/Kconfig:329 > Location: > -> General setup > -> RCU Subsystem > Selected by: m [=m] > > Where did that 'Selected by:' come from? Or is that just an artifact of > the way Kconfig implements 'choice'? Many of the architectures use a "select" clause for RCU, usually selecting CLASSIC_RCU. Could that be the issue? Thanx, Paul