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 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 75CF9C48BD5 for ; Tue, 25 Jun 2019 17:12:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4C9A220883 for ; Tue, 25 Jun 2019 17:12:47 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="a3SMLs+d" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731643AbfFYRMq (ORCPT ); Tue, 25 Jun 2019 13:12:46 -0400 Received: from mail-pl1-f196.google.com ([209.85.214.196]:46271 "EHLO mail-pl1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727540AbfFYRMp (ORCPT ); Tue, 25 Jun 2019 13:12:45 -0400 Received: by mail-pl1-f196.google.com with SMTP id e5so9166014pls.13 for ; Tue, 25 Jun 2019 10:12:45 -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=evJZ611ieJocegJ3LQNW9Eg/UNskUaGIHgsK7ypKVgI=; b=a3SMLs+dWET/7V/UepBDzEvuFcGfzDN4wp15+eaj/zWii+KNOggB6WL1bG8BG9Ikxv bArAc5hMvi9DlkF9+F10Tj6n2UQrQ/wQkE7aKpZPZr3zidP+7DsZcmW/EUH0sCUlAN5x 0+vu/8lI2jV7wnCfiIEWnBsL25pL670ITGdOM= 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=evJZ611ieJocegJ3LQNW9Eg/UNskUaGIHgsK7ypKVgI=; b=lQVA9i8KSo/sUF8ydjd50YbV5EfBxa4iq/SpEswVY/WKcnl6LDOP34Vdxjzn4f2b8g i3GVwmyK/RxcXXe0UlX6tSNWXMR9yeXJsu5qLCMU5l9whOh9M69OEFWxcOqUyoNXq+eN Q6EbQ0uXIMnIK9V1bbxja1p8sKqhzyI9YhjMYbZ8jNhTNwG8MR/Hb3ZlcKfNVTc3zLjN dgaB+XSYUqKqDWARRiEp36elVvhexuR6m1H3PhEXV63WkcJvQ7Pf3dWqApsx9SW9Ei8M bGDl0EvJt3LVCgKw3kpD70GWrTgafhpFERiK0U8QOb3sEnsL6tYjmsITe0o7q5RddDDB axdA== X-Gm-Message-State: APjAAAWpXJGZuhuiVWbaHnvelLchBJN+0ke7dGL9exnWpVt1mud+nezF NxSgftQNe4/Up03V+/QpRZ646Q== X-Google-Smtp-Source: APXvYqwXQYcCcg4xky16h6RsWQUwWMNys8Mo6oo9mRuYdIHGyVw26Oun6x/a7fQXH5k8iQjfjEAP7g== X-Received: by 2002:a17:902:9041:: with SMTP id w1mr143570404plz.132.1561482764938; Tue, 25 Jun 2019 10:12:44 -0700 (PDT) Received: from www.outflux.net (smtp.outflux.net. [198.145.64.163]) by smtp.gmail.com with ESMTPSA id o14sm2846752pjp.29.2019.06.25.10.12.43 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Tue, 25 Jun 2019 10:12:43 -0700 (PDT) Date: Tue, 25 Jun 2019 10:12:42 -0700 From: Kees Cook To: Peter Zijlstra Cc: Miguel Ojeda , "Gustavo A. R. Silva" , Joe Perches , Ingo Molnar , Arnaldo Carvalho de Melo , Alexander Shishkin , Jiri Olsa , Namhyung Kim , Thomas Gleixner , Borislav Petkov , "H. Peter Anvin" , "maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)" , Kan Liang , linux-kernel , Shawn Landden Subject: Re: [PATCH] perf/x86/intel: Mark expected switch fall-throughs Message-ID: <201906251009.BCB7438@keescook> References: <20190624161913.GA32270@embeddedor> <20190624193123.GI3436@hirez.programming.kicks-ass.net> <20190624203737.GL3436@hirez.programming.kicks-ass.net> <3dc75cd4-9a8d-f454-b5fb-64c3e6d1f416@embeddedor.com> <20190625071846.GN3436@hirez.programming.kicks-ass.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190625071846.GN3436@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 Tue, Jun 25, 2019 at 09:18:46AM +0200, Peter Zijlstra wrote: > Can it build a kernel without patches yet? That is, why should I care > what LLVM does? Yes. LLVM trunk builds and boots x86 now. As for distro availability, AIUI, the asm-goto feature missed the 9.0 LLVM branch point, so it'll appear in the following release. -- Kees Cook