From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755345Ab3AMSMz (ORCPT ); Sun, 13 Jan 2013 13:12:55 -0500 Received: from e31.co.us.ibm.com ([32.97.110.149]:38562 "EHLO e31.co.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752526Ab3AMSMx (ORCPT ); Sun, 13 Jan 2013 13:12:53 -0500 Date: Sun, 13 Jan 2013 10:12:45 -0800 From: "Paul E. McKenney" To: Fabio Estevam Cc: paul.mckenney@linaro.org, linux-arm-kernel@lists.infradead.org, linux-kernel Subject: Re: Build error on kernel/rcutree.c Message-ID: <20130113181245.GK3384@linux.vnet.ibm.com> Reply-To: paulmck@linux.vnet.ibm.com References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) X-Content-Scanned: Fidelis XPS MAILER x-cbid: 13011318-7282-0000-0000-000013195DB1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sun, Jan 13, 2013 at 04:03:24PM -0200, Fabio Estevam wrote: > Hi Paul, > > When building ARM imx_v4_v5_defconfig the following error shows up on > linux-next 20130111: > > kernel/rcutree.c:808:2: error: implicit declaration of function > 'rcu_jiffies_till_stall_check' [-Werror=implicit-function-declaration] > kernel/rcutree.c:941:6: error: 'rcu_cpu_stall_suppress' undeclared > (first use in this function) > > Is this a known issue? Yes, the fix is in -rcu and should make it to -next soon. In the meantime, you can work around the problem by avoiding selecting CONFIG_TREE_PREEMPT_RCU=y on SMP=n builds -- use CONFIG_TINY_PREEMPT_RCU instead. Thanx, Paul