From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4D385C2BB85 for ; Tue, 7 Apr 2020 14:28:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 22D552078C for ; Tue, 7 Apr 2020 14:28:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1586269735; bh=G6M+/h+GzYxHgmHQGEXmYLT3cbRilcHwYyAogjKX4uk=; h=Date:From:To:Cc:Subject:Reply-To:References:In-Reply-To:List-ID: From; b=st/TN5TboLfxEEyA/jccka5OP4LLQUP72ZEKRRA9cG1gObv45LgLOsJ6xoY2NyNt6 /Lb4wmRP2MqcLxfC9XxS6BaV3vr8j2XUFn88xQidxo9P06piJxUFYwkcTYiGTdQ/aq QfLSlDP8GIUMYFEWtvCOJ9/h8pcxgYha5xlziyOY= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729185AbgDGO2x (ORCPT ); Tue, 7 Apr 2020 10:28:53 -0400 Received: from mail.kernel.org ([198.145.29.99]:47528 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729163AbgDGO2t (ORCPT ); Tue, 7 Apr 2020 10:28:49 -0400 Received: from paulmck-ThinkPad-P72.home (50-39-105-78.bvtn.or.frontiernet.net [50.39.105.78]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 47C902078C; Tue, 7 Apr 2020 14:28:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1586269729; bh=G6M+/h+GzYxHgmHQGEXmYLT3cbRilcHwYyAogjKX4uk=; h=Date:From:To:Cc:Subject:Reply-To:References:In-Reply-To:From; b=poTrtYyI1ZrO76LYau4vYTfIgauSey2imTJW2W6bU6HLOPNJYCbV71duGry1rsQ0i 79kyUuBSHzuG+gY0ZHtEtXPUvxUppvV0Epen2BHsUW5Qm0CIZkN1HhkI+usUUvfXP+ 2Vl/yfMfHKUBgv/3L5YBENuCmdFQXbeY2EHFi4iY= Received: by paulmck-ThinkPad-P72.home (Postfix, from userid 1000) id 2187435226A6; Tue, 7 Apr 2020 07:28:49 -0700 (PDT) Date: Tue, 7 Apr 2020 07:28:49 -0700 From: "Paul E. McKenney" To: kbuild test robot Cc: kbuild-all@lists.01.org, linux-kernel@vger.kernel.org Subject: Re: [rcu:dev.2020.04.05b 101/101] kprobes.c:undefined reference to `.synchronize_rcu_tasks' Message-ID: <20200407142849.GR19865@paulmck-ThinkPad-P72> Reply-To: paulmck@kernel.org References: <202004071208.Y3tnrrx2%lkp@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <202004071208.Y3tnrrx2%lkp@intel.com> User-Agent: Mutt/1.9.4 (2018-02-28) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Apr 07, 2020 at 12:06:11PM +0800, kbuild test robot wrote: > Hi Paul, > > It's probably a bug fix that unveils the link errors. Looks like my fault, actually, but your "unveils" point is right on, as it appears that this change exposed a bug in an earlier commit. Will fix, and thank you for the testing! Thanx, Paul > tree: https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git dev.2020.04.05b > head: 805020c8028f6e95a8fc57132af5f896a8ad6391 > commit: 805020c8028f6e95a8fc57132af5f896a8ad6391 [101/101] squash! rcu-tasks: Add an RCU Tasks Trace to simplify protection of tracing hooks > config: powerpc-defconfig (attached as .config) > compiler: powerpc64-linux-gcc (GCC) 9.3.0 > reproduce: > wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross > chmod +x ~/bin/make.cross > git checkout 805020c8028f6e95a8fc57132af5f896a8ad6391 > # save the attached .config to linux build tree > GCC_VERSION=9.3.0 make.cross ARCH=powerpc > > If you fix the issue, kindly add following tag as appropriate > Reported-by: kbuild test robot > > All errors (new ones prefixed by >>): > > powerpc64-linux-ld: warning: orphan section `.gnu.hash' from `linker stubs' being placed in section `.gnu.hash' > powerpc64-linux-ld: kernel/kprobes.o: in function `.kprobe_optimizer': > >> kprobes.c:(.text+0x2bc8): undefined reference to `.synchronize_rcu_tasks' > powerpc64-linux-ld: kernel/bpf/trampoline.o: in function `.bpf_trampoline_put': > >> trampoline.c:(.text+0x630): undefined reference to `.synchronize_rcu_tasks' > powerpc64-linux-ld: kernel/bpf/trampoline.o: in function `.bpf_trampoline_update': > trampoline.c:(.text+0x908): undefined reference to `.synchronize_rcu_tasks' > > --- > 0-DAY CI Kernel Test Service, Intel Corporation > https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org