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=-2.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_MUTT 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 8F0BBC04AB4 for ; Fri, 17 May 2019 15:22:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6030D21734 for ; Fri, 17 May 2019 15:22:07 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="qy0bVweP" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729225AbfEQPWG (ORCPT ); Fri, 17 May 2019 11:22:06 -0400 Received: from mail-qt1-f193.google.com ([209.85.160.193]:37402 "EHLO mail-qt1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728749AbfEQPWG (ORCPT ); Fri, 17 May 2019 11:22:06 -0400 Received: by mail-qt1-f193.google.com with SMTP id o7so8433928qtp.4; Fri, 17 May 2019 08:22:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:date:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=tVu9EkldM3onnvk8BPzbzIwspJMsVrSFyKHg7EYG2tA=; b=qy0bVwePhtQ9I7p12Ufs0t1LtV47n7M6OOXey7QmvOHmkhU1FOd7DK9DU1gy5VhAIt 8zv3Am1MJNtddZexuwUyDbvTpPINHvWrA1S0pO8PTPNt3EjC4k5Ecm85q2bgnoPWCSH5 qZFgCMAFiVB/Dn65U7qDV6NyouMSAY7ntW+aFOrjKZB63eCzp27OSOgJN5X7y1S5MiqM CwAQyONH0sSmt2doRrE+UYSGPQu6+6EBoLD/S4XCHHbaMTuaYV5TsK9V95Zfoy9fYv79 plPeNJAAtPkQm+JtcYS8F2p5ScPhVxwkegXp2O8ihmWZ7fajdDy7+Uw090ZPhlm6MNyf 41xw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:date:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=tVu9EkldM3onnvk8BPzbzIwspJMsVrSFyKHg7EYG2tA=; b=UWIrOoI0/i0CbGMjaHtyVAu1a+gSkkg4SewSK5aPdILE2e61tyZF0lwSqKV+/WLhs8 TmV3niJI+QV4SWv5/EYxlxRra3kW36dBzarhOfEQiQRwNTFAZkAGTBwOHex4B1wWkhOi rD6adwu5UGU/Y/qRD3YCeSNBXxvw8lrls+hes4lBtSJrK7oc+iPIC0TncbtEAK2NBOWw 5hXU/9eLAFn4J3iS+m7MKv4jHAFv5hXo7d8ZUVffl4wcniNdEVecDhwbbEUcoZaSfRMS Qh4WhIfSvLbn02vOaZLLtVTbxtcme3ZtCceuJycakZrk/8/IlXvSWNGMmuWipaHnU1rr fpBQ== X-Gm-Message-State: APjAAAXn3LC6zJsX8bhp2iaB478GoBoJ721XhL90b3Mkk9nO0FtzAijV jkv4/R7I/7Bifj5vkGx1p88= X-Google-Smtp-Source: APXvYqz0Hl1IYJlqcHlwcyahYtK5SEW/55qvDt4wBQckSvdhrSXx6zCeJEp/bUrgKrHh5ssple74PA== X-Received: by 2002:a0c:e64f:: with SMTP id c15mr40321600qvn.239.1558106525270; Fri, 17 May 2019 08:22:05 -0700 (PDT) Received: from quaco.ghostprotocols.net ([177.195.211.69]) by smtp.gmail.com with ESMTPSA id v22sm6089750qtj.29.2019.05.17.08.22.03 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Fri, 17 May 2019 08:22:04 -0700 (PDT) From: Arnaldo Carvalho de Melo X-Google-Original-From: Arnaldo Carvalho de Melo Received: by quaco.ghostprotocols.net (Postfix, from userid 1000) id 6ECEB404A1; Fri, 17 May 2019 12:22:00 -0300 (-03) Date: Fri, 17 May 2019 12:22:00 -0300 To: Miguel Ojeda Cc: Greg KH , Peter Zijlstra , Ivan Babrou , Josh Poimboeuf , Ingo Molnar , Alexander Shishkin , Jiri Olsa , Namhyung Kim , linux-kernel , Linux Kbuild mailing list , kernel-team Subject: Re: Linux 4.19 and GCC 9 Message-ID: <20190517152200.GI8945@kernel.org> References: <20190516225013.nvhwqi5tfwtby6qb@treble> <20190517050931.GB32367@kroah.com> <20190517073813.GB2589@hirez.programming.kicks-ass.net> <20190517085126.GA3249@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Url: http://acmel.wordpress.com User-Agent: Mutt/1.11.3 (2019-02-01) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Em Fri, May 17, 2019 at 11:01:45AM +0200, Miguel Ojeda escreveu: > On Fri, May 17, 2019 at 10:51 AM Greg KH wrote: > > > > On Fri, May 17, 2019 at 10:35:29AM +0200, Miguel Ojeda wrote: > > > On Fri, May 17, 2019 at 9:38 AM Peter Zijlstra wrote: > > > > > > > > Right; if there is anything you can reproduce on linus.git I'll happily > > > > have a look. If it doesn't reproduce all you have to do is find the > > > > patches that make it work and ask Greg. > > > > > > Just to clarify: Linus' master is clean of these issues with GCC 9.1.1. > > > > Great! Care to find the patches that did that work and send me the git > > commit ids so that I can queue them up? I don't have gcc9 here yet on > > my systems, so I can not test for this. > > I am unsure about the perf and the objtools parts (Peter/Josh?), but I'm not noticing these while building upstream perf with gcc 9.1.1 on at least fedora:30. 33 fedora:30 : Ok gcc (GCC) 9.1.1 20190503 (Red Hat 9.1.1-1) > about the -Wmissing-attributes I cleaned, they were these: > a6e60d84989f ("include/linux/module.h: copy __init/__exit attrs to > init/cleanup_module") > c0d9782f5b6d ("Compiler Attributes: add support for __copy (gcc >= 9)") > ff98e20ef208 ("lib/crc32.c: mark crc32_le_base/__crc32c_le_base > aliases as __pure") > > Cheers, > Miguel -- - Arnaldo