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=-0.9 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,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 CB6CCC433FF for ; Wed, 31 Jul 2019 20:02:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A5EEB214DA for ; Wed, 31 Jul 2019 20:02:13 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="HX/EPF1G" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730545AbfGaUCL (ORCPT ); Wed, 31 Jul 2019 16:02:11 -0400 Received: from mail-pl1-f194.google.com ([209.85.214.194]:40518 "EHLO mail-pl1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730526AbfGaUCJ (ORCPT ); Wed, 31 Jul 2019 16:02:09 -0400 Received: by mail-pl1-f194.google.com with SMTP id a93so30903318pla.7 for ; Wed, 31 Jul 2019 13:02:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=wxJGZH7300Hgl5asMFjAs9ArUsIJe/EH5/uSYQ1iyTY=; b=HX/EPF1G9PXWWCeOuwtSGUYRGPz8KC0ErJdpABtKhERiS3N871Qmms8DCCGQlhE8LV I9IaFsrGl2wuuUB/Us84dpAaxGjTlPfCwe/nfUhmTCqX+Pr7R5VGvA/6OPrHfFph1rjd H8gKwwHigNku3W/W2ISHwc82SSQBos0giQSHo= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=wxJGZH7300Hgl5asMFjAs9ArUsIJe/EH5/uSYQ1iyTY=; b=uj9cHTHabm2ru+g2uqjpirBBbD5llc2lnUEByBkzRDm9w/LtLlX/bBn0PSmyTM7m6i 4oW7oSw9ik2AqX0sW+fEk6A4vEHhFRDB5kwyW31ML1zZb/noBFTvAYakjnNda/tH16qk QakQRAWn3xVYqInAe/FKOWdOCtv1ldslW1akd7SiriW+pRU7hJxvlifRkxdVA7gk54Hk u96rqEzPyIOEJuplNtdh7lyrcEIdEjkqnKYYTXwN6jymG9+qINce2fZwgXrxCR00PpR6 lpbRmV7qRWSiYLW22obKULtaFLbVvTjPRlEigwtB5nc0HEPTi+r/Xxy8HKa+dCPKL7zu 4SSQ== X-Gm-Message-State: APjAAAViMcTpaC+/qnWN3NdMDTlQ34AqDU+KT22eSw9W6siybePvJTYI LWf3zoxNAih1lvCi3AQANwdU/A== X-Google-Smtp-Source: APXvYqwj1zep+ZZXF3Ri3+Jyb3qYUQRgfqwHDJSbxfZDvAjGESsg9IbU6tepVSR5HREw2MVEik1giA== X-Received: by 2002:a17:902:4401:: with SMTP id k1mr98479912pld.193.1564603329180; Wed, 31 Jul 2019 13:02:09 -0700 (PDT) Received: from www.outflux.net (smtp.outflux.net. [198.145.64.163]) by smtp.gmail.com with ESMTPSA id 196sm74088643pfy.167.2019.07.31.13.02.08 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Wed, 31 Jul 2019 13:02:08 -0700 (PDT) Date: Wed, 31 Jul 2019 13:02:07 -0700 From: Kees Cook To: Peter Zijlstra Cc: hpa@zytor.com, Joe Perches , Pavel Machek , Linus Torvalds , Miguel Ojeda , Borislav Petkov , Thomas Gleixner , Ingo Molnar , "Gustavo A . R . Silva" , Arnaldo Carvalho de Melo , Kan Liang , Namhyung Kim , Jiri Olsa , Alexander Shishkin , Shawn Landden , x86@kernel.org, linux-kernel@vger.kernel.org Subject: Re: [RFC PATCH] compiler_attributes.h: Add 'fallthrough' pseudo keyword for switch/case use Message-ID: <201907311301.EC1D84F@keescook> References: <1d2830aadbe9d8151728a7df5b88528fc72a0095.1564549413.git.joe@perches.com> <20190731171429.GA24222@amd> <765E740C-4259-4835-A58D-432006628BAC@zytor.com> <20190731184832.GZ31381@hirez.programming.kicks-ass.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190731184832.GZ31381@hirez.programming.kicks-ass.net> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Jul 31, 2019 at 08:48:32PM +0200, Peter Zijlstra wrote: > On Wed, Jul 31, 2019 at 11:24:36AM -0700, hpa@zytor.com wrote: > > >> > +/* > > >> > + * Add the pseudo keyword 'fallthrough' so case statement blocks > > >> > + * must end with any of these keywords: > > >> > + * break; > > >> > + * fallthrough; > > >> > + * goto