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=-8.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 8E071C004C9 for ; Tue, 7 May 2019 06:01:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5ACA6214AE for ; Tue, 7 May 2019 06:01:25 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="K4n96ez5" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726888AbfEGGBX (ORCPT ); Tue, 7 May 2019 02:01:23 -0400 Received: from mail-pg1-f193.google.com ([209.85.215.193]:41654 "EHLO mail-pg1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726812AbfEGGBR (ORCPT ); Tue, 7 May 2019 02:01:17 -0400 Received: by mail-pg1-f193.google.com with SMTP id z3so4012531pgp.8 for ; Mon, 06 May 2019 23:01:17 -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; bh=UdlhNmncQt68SNh9Q/6nsPN42unpZnH30BwmpVsaWqg=; b=K4n96ez51FxYMSjV3AwWRVwu6aK7Sv3T3F40tH9NH8ExfkH6Y0pSeyuAX2ulXGiXgZ ddqJ9y2IvS73rx/MJg9VBNfVn7m+ohjwG1KX+KSIQ+0d2GIwN3MP6LqgxfOW3eA8YO8X d5LyIpElXCazVoF7i1pRb0ZVBUFZhwhz09mZzCIEhnQVhWbR6H4gd0F+zAUqWh6PqRVz opyGTK6m5aFIfxcNn8ZlhO73Ug16Jt5bRMNUeMCGUmZ3CmuVEpqk0tihpLSOFSGmBwaj +mB09oPvNhoKVigRS9fpicLYHpf28UFfQkeubRYepnjbqLI0cu0TWjZBygrfUdr96wxN KzZQ== 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; bh=UdlhNmncQt68SNh9Q/6nsPN42unpZnH30BwmpVsaWqg=; b=c0Fag87wWtAE6W6KZM4+UzumuwBSWDkpIbvB6ENyrOFtaHoWRDwjfA9n/1OLqMORyE 8ij5bFaaEm1172d26fFqJTPHYLlBjczJ8DMBb8yrDmFcUV3rXFEy2r5Gk2kay3yoQpQB gkpN1Kkc2hBOAhC8rCtw2jyLXkMYedUujQH6vq75AFu4A3nT02Vl1LQmXwxEtS1Pinrd iCzuRJ5flcZnomW1H3jLiZ3+W20098DW/5Ukkk9ESrVq4LLEeF3rA0uJbXfI5/N4npvx YPVgQ+AzIFGGAMYQSO0ECaqk5eBYQohd897VKTFZVWG+o8OdgGT4LxsgbqWLLtKS78a0 NBfA== X-Gm-Message-State: APjAAAVAGJ90r2nDZKDcUeP3S3G4+13uYiSvVah1lGPWzo/U5ZNb1qgH BgNf6x/cMRk8h0NvI/ByuA== X-Google-Smtp-Source: APXvYqxkSRBG5Y+LBRYnfawHEhwPlKbopAjaFHdRmODBvET7Q/5U3ABNq51poGlBhwo+tU9oEj19Xw== X-Received: by 2002:a63:2cc9:: with SMTP id s192mr33552150pgs.24.1557208877228; Mon, 06 May 2019 23:01:17 -0700 (PDT) Received: from mylaptop.redhat.com ([209.132.188.80]) by smtp.gmail.com with ESMTPSA id b18sm8997409pfp.32.2019.05.06.23.01.13 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 06 May 2019 23:01:16 -0700 (PDT) From: Pingfan Liu To: x86@kernel.org Cc: Pingfan Liu , Thomas Gleixner , Ingo Molnar , Borislav Petkov , "H. Peter Anvin" , Jordan Borgner , linux-kernel@vger.kernel.org Subject: [PATCH 1/2] x86/boot: move early_serial_base to .data section Date: Tue, 7 May 2019 14:00:59 +0800 Message-Id: <1557208860-12846-1-git-send-email-kernelfans@gmail.com> X-Mailer: git-send-email 2.7.4 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org arch/x86/boot/compressed/head_64.S clears BSS after relocated. If early serial is set up before clearing BSS, the early_serial_base will be reset to 0. Initializing early_serial_base as -1 to push it to .data section. Signed-off-by: Pingfan Liu Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Borislav Petkov Cc: "H. Peter Anvin" Cc: Jordan Borgner Cc: linux-kernel@vger.kernel.org --- arch/x86/boot/compressed/early_serial_console.c | 2 +- arch/x86/boot/early_serial_console.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/x86/boot/compressed/early_serial_console.c b/arch/x86/boot/compressed/early_serial_console.c index 261e81f..624e334 100644 --- a/arch/x86/boot/compressed/early_serial_console.c +++ b/arch/x86/boot/compressed/early_serial_console.c @@ -1,5 +1,5 @@ #include "misc.h" -int early_serial_base; +int early_serial_base = -1; #include "../early_serial_console.c" diff --git a/arch/x86/boot/early_serial_console.c b/arch/x86/boot/early_serial_console.c index 023bf1c..d8de15a 100644 --- a/arch/x86/boot/early_serial_console.c +++ b/arch/x86/boot/early_serial_console.c @@ -149,6 +149,6 @@ void console_init(void) { parse_earlyprintk(); - if (!early_serial_base) + if (early_serial_base <= 0) parse_console_uart8250(); } -- 2.7.4