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=-3.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,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 6C056C43461 for ; Tue, 15 Sep 2020 21:52:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 258842078E for ; Tue, 15 Sep 2020 21:52:21 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="JMx5zfQ9" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728080AbgIOVwA (ORCPT ); Tue, 15 Sep 2020 17:52:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47076 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728130AbgIOVvP (ORCPT ); Tue, 15 Sep 2020 17:51:15 -0400 Received: from mail-qk1-x732.google.com (mail-qk1-x732.google.com [IPv6:2607:f8b0:4864:20::732]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9F6DDC061788 for ; Tue, 15 Sep 2020 14:50:58 -0700 (PDT) Received: by mail-qk1-x732.google.com with SMTP id w12so6010185qki.6 for ; Tue, 15 Sep 2020 14:50:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:from:date:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=Zss3uHpc3ttf17gwYIy/82ETb9atEX8U54o98v0HqrI=; b=JMx5zfQ9BbjulbIHdSy28ZcOznZ5f/Xq/6bQkDVISIJi/F6I+QwAqWdwZgSziPAwI4 q6qj+407GzYNZpUbx1+GlMj+qTcnd/tJqcvfpDyAi7wX+5/LrauFbagH2upSl0nw+EJM MZCBN2RA3v9kKzKA9BwuNSqT7l4rpEz/IL/7AHpbJPuUsngNsVOHYyY+1EmxEKvQn1sC +f63PjgfPZUyD3/DR0ksbL68deXDnhkoEFQLbDcVbbo2dRUtJ270M0W3SyTSu6UJHYvb B0ettbnl/CEZ7NvWzNTMQHloMSnB1GVPSXnGld9tuAZBKJMpVxRETkfqgptrg5qf1OAM zgXQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:from:date:to:cc:subject:message-id :references:mime-version:content-disposition:in-reply-to; bh=Zss3uHpc3ttf17gwYIy/82ETb9atEX8U54o98v0HqrI=; b=TZR4cfN2hPOWiTyuwupXRT2zNJWeYi8kADKz261oD993d6er9flo/xLw+G32iihkez NmKVmo6ZUaBmDLKLPlxzG6jn434IbUq9VNGNHllI/QWHt833D9IxP0Q/WXRSaMQgNyhV VeASS39/gJDAz4GGejHyrPUPtxUZIaTtMcxvPCNUFpkOC8H0TX7cGY30eqHCMz7Mfok4 alS4tzUgO7tR8hzsDv6p3lt9jZz34A1Eoney+oAKfvs5nOTiubDfLM13tlGiWdWddUZn YIAgv6KT0VqG1BNFMqHtQNExmp97GXZcZ5z+gt7KL5uwF6TiI6DOeVwe5jUrPfevpi42 9fgg== X-Gm-Message-State: AOAM532Vvz12azJVRGi5av1mOkBV21WPNBvVOg38YlZn0LxONdCtoIKl z7AnuPU9OLLYfmyLt9oqD/s= X-Google-Smtp-Source: ABdhPJzYrBdnyxvf9ORk3FEMnVid6O7hmMVUBWDu3Mb28AsA7U+nutHMqdw2PHZU7WHYLQWk0sK4Ug== X-Received: by 2002:a05:620a:a45:: with SMTP id j5mr20266791qka.367.1600206656635; Tue, 15 Sep 2020 14:50:56 -0700 (PDT) Received: from rani.riverdale.lan ([2001:470:1f07:5f3::b55f]) by smtp.gmail.com with ESMTPSA id m24sm9337458qtn.59.2020.09.15.14.50.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 15 Sep 2020 14:50:56 -0700 (PDT) From: Arvind Sankar X-Google-Original-From: Arvind Sankar Date: Tue, 15 Sep 2020 17:50:54 -0400 To: Borislav Petkov Cc: Nick Desaulniers , Josh Poimboeuf , Rong Chen , kernel test robot , "Li, Philip" , x86-ml , LKML , clang-built-linux , Marco Elver Subject: Re: [tip:x86/seves] BUILD SUCCESS WITH WARNING e6eb15c9ba3165698488ae5c34920eea20eaa38e Message-ID: <20200915215054.GA1104608@rani.riverdale.lan> References: <5f60c4e0.Ru0MTgSE9A7mqhpG%lkp@intel.com> <20200915135519.GJ14436@zn.tnic> <20200915141816.GC28738@shao2-debian> <20200915160554.GN14436@zn.tnic> <20200915170248.gcv54pvyckteyhk3@treble> <20200915204912.GA14436@zn.tnic> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20200915204912.GA14436@zn.tnic> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Sep 15, 2020 at 10:49:12PM +0200, Borislav Petkov wrote: > > (Btw, clang doesn't need to add that "xor %eax,%eax" - panic() should not be > returning, ever. :-)) > I think this is because panic() is varargs, and clang doesn't support gcc's -mskip-rax-setup. The normal ABI requires the caller to set RAX to the number of arguments in vector registers. https://patchwork.ozlabs.org/project/gcc/patch/20141218131150.GA32638@intel.com/