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=-2.7 required=3.0 tests=BAYES_00,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 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 CAAA6C71156 for ; Wed, 25 Nov 2020 01:07:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7FEBA2151B for ; Wed, 25 Nov 2020 01:07:15 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="PLHqMkuV" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728076AbgKYBGH (ORCPT ); Tue, 24 Nov 2020 20:06:07 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57236 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727789AbgKYBGB (ORCPT ); Tue, 24 Nov 2020 20:06:01 -0500 Received: from mail-qk1-x742.google.com (mail-qk1-x742.google.com [IPv6:2607:f8b0:4864:20::742]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 402E8C0613D6; Tue, 24 Nov 2020 17:06:01 -0800 (PST) Received: by mail-qk1-x742.google.com with SMTP id q5so1433321qkc.12; Tue, 24 Nov 2020 17:06:01 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=44pFzPZOXy9WMyxuVZ4PJwmHwfPvC91GWhNSdpkVBXk=; b=PLHqMkuVQ6uE1aGa3jPkk7oL0rd2+0aQGjbXwXCM1BqpOEf5R6gUmrb1tTrj75nDjD aG6VHTDP2JdODJ/e29C1vfEMjWhTPlycM3mNfL2JW5BhFtstP0di/Kwb3XYGnsRoKRp5 7FVJzAE2cPEDrpLIYX3jwoIfPno8H9ArdOwpkc9HelZA+M7Eq52S4RmPBHauFrK9tfW3 8wrBLWN/Mq7Fl9GTodmgwwudDuqrVUSiSILvkeQCl7qFs3/IjbI7/AG3m5iLRdEEw+2H RzsA5+EdKfz0DIt5iJKomdRqiV67cH8ZcnWPF2PnARf/ANxCrT7QZJCkY0VU2DrQ9d/L oW2A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=44pFzPZOXy9WMyxuVZ4PJwmHwfPvC91GWhNSdpkVBXk=; b=SP1p0mv6tcasA0zjctwklRPuqCucLzpbUEoeQuQCE403Vw1wJTOPenb/wB6UzHrH8V CEbDrvJHOMLkjUXMv7x5f9d9EHCKeZkhnj/wqmh3M1e50j4BhlGw6c7I8JJPA0109e/d vfnCZxaNcIXUjMdU/MMen6CpRA8fenGalTBDz4LguBNbZkiHJCemof4ebdpdoAek8wac lj1DqcsebfpC1b5u7uV2IfcXIhm9qvUbNNRSTDX6SkbjRAZMWj9TDrYZWq+GNROX+xdb vNBFoaqkps142vfQF8ENhHQJbj3IMSLO+BWQamS8FMFTWRfk1aG5nJzC5oXJ/NYESCd0 LWOg== X-Gm-Message-State: AOAM53315a5CQglNJi6muaFhDfWMEm+HjvKkK02zci4+0RKe4Cgw0n+l lUmVUCbrWBL7dwzg9uJUS+Yz0m6xY+JSD8teb/Q= X-Google-Smtp-Source: ABdhPJxG2tW9FM1fAqThCcvqKAPI/OeE1R4V2//A8ePZuSketjr0yKUxoxj6t2hcKlYt9sKRSewQcSyhG/w+5cGdzqU= X-Received: by 2002:a25:aac5:: with SMTP id t63mr1046305ybi.22.1606266360499; Tue, 24 Nov 2020 17:06:00 -0800 (PST) MIME-Version: 1.0 References: <202011201129.B13FDB3C@keescook> <20201120115142.292999b2@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com> <202011220816.8B6591A@keescook> <9b57fd4914b46f38d54087d75e072d6e947cb56d.camel@HansenPartnership.com> <0147972a72bc13f3629de8a32dee6f1f308994b5.camel@HansenPartnership.com> <20201123130348.GA3119@embeddedor> <8f5611bb015e044fa1c0a48147293923c2d904e4.camel@HansenPartnership.com> <202011241327.BB28F12F6@keescook> In-Reply-To: From: Miguel Ojeda Date: Wed, 25 Nov 2020 02:05:49 +0100 Message-ID: Subject: Re: [Intel-wired-lan] [PATCH 000/141] Fix fall-through warnings for Clang To: Finn Thain Cc: Kees Cook , James Bottomley , "Gustavo A. R. Silva" , Joe Perches , Jakub Kicinski , alsa-devel@alsa-project.org, linux-atm-general@lists.sourceforge.net, reiserfs-devel@vger.kernel.org, linux-iio@vger.kernel.org, linux-wireless , linux-fbdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-kernel , Nathan Chancellor , linux-ide@vger.kernel.org, dm-devel@redhat.com, keyrings@vger.kernel.org, linux-mtd@lists.infradead.org, GR-everest-linux-l2@marvell.com, wcn36xx@lists.infradead.org, samba-technical@lists.samba.org, linux-i3c@lists.infradead.org, linux1394-devel@lists.sourceforge.net, linux-afs@lists.infradead.org, usb-storage@lists.one-eyed-alien.net, drbd-dev@lists.linbit.com, devel@driverdev.osuosl.org, linux-cifs@vger.kernel.org, rds-devel@oss.oracle.com, Nick Desaulniers , linux-scsi@vger.kernel.org, linux-rdma@vger.kernel.org, oss-drivers@netronome.com, bridge@lists.linux-foundation.org, linux-security-module@vger.kernel.org, amd-gfx@lists.freedesktop.org, linux-stm32@st-md-mailman.stormreply.com, cluster-devel@redhat.com, linux-acpi@vger.kernel.org, coreteam@netfilter.org, intel-wired-lan@lists.osuosl.org, linux-input , Miguel Ojeda , tipc-discussion@lists.sourceforge.net, Ext4 Developers List , Linux Media Mailing List , linux-watchdog@vger.kernel.org, selinux@vger.kernel.org, linux-arm-msm@vger.kernel.org, intel-gfx@lists.freedesktop.org, linux-geode@lists.infradead.org, linux-can@vger.kernel.org, linux-block@vger.kernel.org, linux-gpio@vger.kernel.org, op-tee@lists.trustedfirmware.org, linux-mediatek@lists.infradead.org, xen-devel@lists.xenproject.org, nouveau@lists.freedesktop.org, linux-hams@vger.kernel.org, ceph-devel@vger.kernel.org, virtualization@lists.linux-foundation.org, Linux ARM , linux-hwmon@vger.kernel.org, "maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)" , linux-nfs@vger.kernel.org, GR-Linux-NIC-Dev@marvell.com, Linux-MM , Network Development , linux-decnet-user@lists.sourceforge.net, linux-mmc@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-sctp@vger.kernel.org, linux-usb@vger.kernel.org, netfilter-devel@vger.kernel.org, Linux Crypto Mailing List , patches@opensource.cirrus.com, linux-integrity@vger.kernel.org, target-devel@vger.kernel.org, linux-hardening@vger.kernel.org, Jonathan Cameron , Greg KH Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: On Wed, Nov 25, 2020 at 12:53 AM Finn Thain wrote: > > I'm saying that supporting the official language spec makes more sense > than attempting to support a multitude of divergent interpretations of the > spec (i.e. gcc, clang, coverity etc.) Making the kernel strictly conforming is a ship that sailed long ago, for several reasons. Anyway, supporting several compilers and other tools, regardless of extensions, is valuable. > I'm also saying that the reason why we use -std=gnu89 is that existing > code was written in that language, not in ad hoc languages comprised of > collections of extensions that change with every release. No, we aren't particularly tied to `gnu89` or anything like that. We could actually go for `gnu11` already, since the minimum GCC and Clang support it. Even if a bit of code needs fixing, that shouldn't be a problem if someone puts the work. In other words, the kernel code is not frozen, nor are the features it uses from compilers. They do, in fact, change from time to time. > Thank you for checking. I found a free version that's only 6 weeks old: You're welcome! There are quite a few new attributes coming, mostly following C++ ones. > It will be interesting to see whether 6.7.11.5 changes once the various > implementations reach agreement. Not sure what you mean. The standard does not evolve through implementations' agreement (although standardizing existing practice is one of the best arguments to back a change). Cheers, Miguel