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=-2.4 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,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 53CE0C43331 for ; Thu, 2 Apr 2020 13:40:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 28C5220784 for ; Thu, 2 Apr 2020 13:40:59 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=alien8.de header.i=@alien8.de header.b="p9Ndyypo" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388732AbgDBNk6 (ORCPT ); Thu, 2 Apr 2020 09:40:58 -0400 Received: from mail.skyhub.de ([5.9.137.197]:48220 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388704AbgDBNk4 (ORCPT ); Thu, 2 Apr 2020 09:40:56 -0400 Received: from zn.tnic (p200300EC2F0A0E0081B68A69B956B416.dip0.t-ipconnect.de [IPv6:2003:ec:2f0a:e00:81b6:8a69:b956:b416]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.skyhub.de (SuperMail on ZX Spectrum 128k) with ESMTPSA id 1280B1EC036E; Thu, 2 Apr 2020 15:40:55 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=dkim; t=1585834855; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:in-reply-to:in-reply-to: references:references; bh=uvDwDvayPnasF2wlj/alAw6qSHbI8V86P3t492TnSQE=; b=p9NdyyponqEKJhwCaYtXDMl6RzVPPouWs1gryeBcmwkiGFQmuSZm/1SpTar/1mUxX2Wgn7 16eVmTYc4jlSTBLH1fo1zcMWpJWG9biAmGJp5E8LidojFGQOHTlImtru2fZzDM0vYVcjdl bTvcn3/YQkDsy0FnP4TYSTl4BHZJ++U= Date: Thu, 2 Apr 2020 15:40:51 +0200 From: Borislav Petkov To: Linus Torvalds Cc: Thomas Gleixner , Ingo Molnar , Al Viro , Andy Lutomirski , Linux Kernel Mailing List , Peter Zijlstra , Andrew Morton , Michael Matz Subject: Re: [GIT PULL] x86 cleanups for v5.7 Message-ID: <20200402134051.GC9352@zn.tnic> References: <20200331080111.GA20569@gmail.com> <87v9mioj5r.fsf@nanos.tec.linutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Apr 01, 2020 at 05:16:24PM -0700, Linus Torvalds wrote: > Nobody else has a working compiler to even test that patch, because > even upstream tip-of-the-day llvm mis-generates code (I have a patch > that makes it generate ok code, but that one isn't good enough to > actually go upstream in llvm). Btw, looking at this: https://reviews.llvm.org/rG50cac248773 and talking to a gcc guy (CCed), it should be also relatively easy to do the fallthrough variant in gcc too so you could open a feature request for that in the gcc bugzilla. HTH. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette