From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751799AbbIBF0T (ORCPT ); Wed, 2 Sep 2015 01:26:19 -0400 Received: from e39.co.us.ibm.com ([32.97.110.160]:38092 "EHLO e39.co.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750805AbbIBF0S (ORCPT ); Wed, 2 Sep 2015 01:26:18 -0400 X-Helo: d03dlp01.boulder.ibm.com X-MailFrom: paulmck@linux.vnet.ibm.com X-RcptTo: linux-next@vger.kernel.org Date: Tue, 1 Sep 2015 22:26:13 -0700 From: "Paul E. McKenney" To: Stephen Rothwell Cc: linux-next@vger.kernel.org, linux-kernel@vger.kernel.org, Davidlohr Bueso Subject: Re: linux-next: build failure after merge of the rcu tree Message-ID: <20150902052612.GK4029@linux.vnet.ibm.com> Reply-To: paulmck@linux.vnet.ibm.com References: <20150901135006.78be270e@canb.auug.org.au> <20150901074946.GF4029@linux.vnet.ibm.com> <20150902135800.068f0f4a@canb.auug.org.au> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20150902135800.068f0f4a@canb.auug.org.au> User-Agent: Mutt/1.5.21 (2010-09-15) X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 15090205-0033-0000-0000-000005B7E201 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Sep 02, 2015 at 01:58:00PM +1000, Stephen Rothwell wrote: > Hi Paul, > > On Tue, 1 Sep 2015 00:49:46 -0700 "Paul E. McKenney" wrote: > > > > On Tue, Sep 01, 2015 at 01:50:06PM +1000, Stephen Rothwell wrote: > > > > > > After merging the rcu tree, today's linux-next build (x86_64 allmodconfig) > > > failed like this: > > > > > > ERROR: "sched_setscheduler_nocheck" [kernel/locking/locktorture.ko] undefined! > > > ERROR: "percpu_down_write" [kernel/locking/locktorture.ko] undefined! > > > ERROR: "percpu_up_write" [kernel/locking/locktorture.ko] undefined! > > > ERROR: "percpu_down_read" [kernel/locking/locktorture.ko] undefined! > > > ERROR: "percpu_up_read" [kernel/locking/locktorture.ko] undefined! > > > ERROR: "__percpu_init_rwsem" [kernel/locking/locktorture.ko] undefined! > > > > > > Caused by commits > > > > > > 04be76a9b067 ("locktorture: Support rtmutex torturing") > > > 40b2996f9b32 ("locktorture: Add torture tests for percpu_rwsem") > > > > > > and maybe more. > > > > > > I have used the rcu tree from next-20150831 for today. > > > > It is looking like I will be deferring these to v4.4, apologies for > > the hassle! > > This still fails to build but now I only get the error about > sched_setscheduler_nocheck. OK, now I actually have deferred these to v4.4. Davidlohr, the error is due to sched_setscheduler_nocheck() not being exported, so that Stephen gets this failure when building modules. This is 04be76a9b067 (locktorture: Support rtmutex torturing) in -rcu. Thoughts? Thanx, Paul