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=-2.1 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=no 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 D7FFDC33CB3 for ; Fri, 17 Jan 2020 22:16:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A8EB5222C3 for ; Fri, 17 Jan 2020 22:16:20 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="oKyPNlVD" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726982AbgAQWQR (ORCPT ); Fri, 17 Jan 2020 17:16:17 -0500 Received: from bombadil.infradead.org ([198.137.202.133]:50132 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726861AbgAQWQR (ORCPT ); Fri, 17 Jan 2020 17:16:17 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=Content-Transfer-Encoding: Content-Type:In-Reply-To:MIME-Version:Date:Message-ID:From:References:Cc:To: Subject:Sender:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=CFwRKOc+gezyceo0kC40ZLd3xOsAPmQzS5kapaZ2B18=; b=oKyPNlVDNwLxSQvsjfAkGK9aF R9eBYNoE5+kpCUwwuCM4AIBAFTneRiyrGJFIsrpgGpiY5vl652zEBt5pFSlhiGeGXy8CW1OjBk3iQ P/mwDGmpeXiizWRqFXXiZq5GZ/nCoznlISFqOqczXQzwAEKz4cjuJtZc988M18xUs01YsUj3eeJPP k5rUNPFnZIkmxfG8BzmfOUyVedBRIrP7PicBbfBevLz5OkFNdhy4PMuLb2AB73bfVZh67MXl9jMop LqLNId60/MmxANfdKyra+NdBP9yZ465zbOrudluqx7J0gwtqrMApT0L59lqQWDWHhdzNZxc4xqkSO qyuO8rj6w==; Received: from [2601:1c0:6280:3f0::ed68] by bombadil.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1isZuG-0001rZ-79; Fri, 17 Jan 2020 22:15:56 +0000 Subject: Re: mmotm 2019-12-10-19-14 uploaded (objtool: func() falls through) To: Josh Poimboeuf Cc: Andrew Morton , broonie@kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-next@vger.kernel.org, mhocko@suse.cz, mm-commits@vger.kernel.org, sfr@canb.auug.org.au, Peter Zijlstra References: <20191211031432.iyKVQ6m9n%akpm@linux-foundation.org> <07777464-b9d8-ff1d-41d9-f62cc44f09f3@infradead.org> <20191212184859.zjj2ycfkvpcns5bk@treble> <042c6cd7-c983-03f1-6a79-5642549f57c4@infradead.org> <20191212205811.4vrrb4hou3tbiada@treble> <20200117181121.3h72dajey7oticbf@treble> From: Randy Dunlap Message-ID: Date: Fri, 17 Jan 2020 14:15:54 -0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.3.0 MIME-Version: 1.0 In-Reply-To: <20200117181121.3h72dajey7oticbf@treble> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-next-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-next@vger.kernel.org On 1/17/20 10:11 AM, Josh Poimboeuf wrote: > On Thu, Dec 12, 2019 at 02:58:11PM -0600, Josh Poimboeuf wrote: >> On Thu, Dec 12, 2019 at 12:21:17PM -0800, Randy Dunlap wrote: >>> On 12/12/19 10:48 AM, Josh Poimboeuf wrote: >>>> On Wed, Dec 11, 2019 at 08:31:08AM -0800, Randy Dunlap wrote: >>>>> On 12/10/19 7:14 PM, Andrew Morton wrote: >>>>>> The mm-of-the-moment snapshot 2019-12-10-19-14 has been uploaded to >>>>>> >>>>>> http://www.ozlabs.org/~akpm/mmotm/ >>>>>> >>>>>> mmotm-readme.txt says >>>>>> >>>>>> README for mm-of-the-moment: >>>>>> >>>>>> http://www.ozlabs.org/~akpm/mmotm/ >>>>>> >>>>>> This is a snapshot of my -mm patch queue. Uploaded at random hopefully >>>>>> more than once a week. >>>>>> >>>>>> You will need quilt to apply these patches to the latest Linus release (5.x >>>>>> or 5.x-rcY). The series file is in broken-out.tar.gz and is duplicated in >>>>>> http://ozlabs.org/~akpm/mmotm/series >>>>>> >>>>>> The file broken-out.tar.gz contains two datestamp files: .DATE and >>>>>> .DATE-yyyy-mm-dd-hh-mm-ss. Both contain the string yyyy-mm-dd-hh-mm-ss, >>>>>> followed by the base kernel version against which this patch series is to >>>>>> be applied. >>>>> >>>>> on x86_64: >>>>> >>>>> drivers/hwmon/f71882fg.o: warning: objtool: f71882fg_update_device() falls through to next function show_pwm_auto_point_temp_hyst() >>>>> drivers/ide/ide-probe.o: warning: objtool: hwif_register_devices() falls through to next function hwif_release_dev() >>>>> drivers/ide/ide-probe.o: warning: objtool: ide_host_remove() falls through to next function ide_disable_port() >>>> >>>> Randy, can you share the .o files? >>> >>> Sure. They are attached. >> >> These look like compiler bugs to me... execution is falling off the edge >> of the functions for no apparent reason. Could potentially be triggered >> by the '#define if' trace code. > > Randy, do you happen to have a config which triggers the above bugs? I > can reduce the test cases and open a GCC bug. > No, but I'll try to recreate the issue and get back to you. -- ~Randy