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=-3.8 required=3.0 tests=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,USER_AGENT_GIT 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 A8D5BC32751 for ; Wed, 31 Jul 2019 05:46:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 75D622067D for ; Wed, 31 Jul 2019 05:46:36 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="JtWLln2y" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726419AbfGaFqe (ORCPT ); Wed, 31 Jul 2019 01:46:34 -0400 Received: from mail-pf1-f195.google.com ([209.85.210.195]:33043 "EHLO mail-pf1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725290AbfGaFqe (ORCPT ); Wed, 31 Jul 2019 01:46:34 -0400 Received: by mail-pf1-f195.google.com with SMTP id g2so31197844pfq.0 for ; Tue, 30 Jul 2019 22:46:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=uao5bjHpVUOK+0NKYRiD++G1RQ9m6s2L9wyXdVkAQpA=; b=JtWLln2yoEty9uAo7+ZPWwi0Q/RCE9qewEGcFD8mqWk/2mZCRc/x/AYiv7nDRtAcI/ dCf0sdyo6j1RNGOEkRixlwotC0CFKny139MgNU/3+VmQE8JB3sLT3Ook0sB9GhLbGwhP 5N3+HhQChxvh23eLc2Hb4QhJJanOJDEI70wxRabvXMSt3hppgs2SyCA+dpVxXwZPWe4s hGGWg7dZlVLMKj3AQFqy9we5gofcBfNzccGkmY7jNsbFKeAu5US/FVBLnuN47jtyFkOr r8NYCI9E7DqQkNO5rXBkoIHXCkWSKA29u6oQDjHDEC8AWxTXTXXhfreH33EENdS6fJFV 06gw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=uao5bjHpVUOK+0NKYRiD++G1RQ9m6s2L9wyXdVkAQpA=; b=qP2OadYWenSsHi1tXGhJAFcNVyut2WKXtM49GQDfjpSI1tPw0pqyjAhGFFhUFJn637 6AMrLW3AbUdnG4eitgTVwIhUsKu2bPj3qEx4wfDjeJGSik6YljQfyAnScGV82WqxeCQp OKcZH9by9k2eEeQtkyjlGqpkD+DURJ/bpKB3h53+SMa6/twdmhEX6+teDKk6rqVSoGwH M9TcTLuR1MWVnzO6OiK3rjU2M0TYw36SycnGSgzuOrOKA8lRTRP//inFrvlG8H6BP93t JAdiSAPDyYXFIIhjdgi+/v8NIDFMF8/FBZac0/IPwbowUZnHNKONtESw/bOoQGCjHDvI MHIg== X-Gm-Message-State: APjAAAWqqh6E4vwkUjQpoMrbyHGYGzrj9O2nvIZtNF82rJTl0xRgjCaQ WujmQkjje4VHn2Y2OUNWZAs= X-Google-Smtp-Source: APXvYqypyhLbNH6a1NPexSpbeMe9IpVtPIzWfHam7ICgtSGzg97ENqrRgMYd+jntVe8DO/vJfCRZ9g== X-Received: by 2002:aa7:9359:: with SMTP id 25mr44250596pfn.261.1564551993984; Tue, 30 Jul 2019 22:46:33 -0700 (PDT) Received: from blueforge.nvidia.com (searspoint.nvidia.com. [216.228.112.21]) by smtp.gmail.com with ESMTPSA id k70sm648127pje.14.2019.07.30.22.46.33 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Tue, 30 Jul 2019 22:46:33 -0700 (PDT) From: john.hubbard@gmail.com X-Google-Original-From: jhubbard@nvidia.com To: "H . Peter Anvin" Cc: Thomas Gleixner , Ingo Molnar , Borislav Petkov , x86@kernel.org, LKML , John Hubbard Subject: [PATCH v2 0/1] x86/boot: save fields explicitly, zero out everything else Date: Tue, 30 Jul 2019 22:46:26 -0700 Message-Id: <20190731054627.5627-1-jhubbard@nvidia.com> X-Mailer: git-send-email 2.22.0 MIME-Version: 1.0 X-NVConfidentiality: public Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: John Hubbard Hi, This uses the "save each field explicitly" approach that we discussed during the first review [1]. As in [1], this is motivated by a desire to clear the compiler warnings when building with gcc 9. This is difficult to properly test. I've done a basic boot test, but if there are actually errors in which items get zeroed or not, I don't have a good test to uncover that. [1] https://lore.kernel.org/r/alpine.DEB.2.21.1907260036500.1791@nanos.tec.linutronix.de John Hubbard (1): x86/boot: save fields explicitly, zero out everything else arch/x86/include/asm/bootparam_utils.h | 62 +++++++++++++++++++------- 1 file changed, 47 insertions(+), 15 deletions(-) -- 2.22.0