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=-11.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 6C482C34047 for ; Wed, 19 Feb 2020 16:55:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4CABA24676 for ; Wed, 19 Feb 2020 16:55:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726761AbgBSQz0 (ORCPT ); Wed, 19 Feb 2020 11:55:26 -0500 Received: from Galois.linutronix.de ([193.142.43.55]:38823 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726700AbgBSQzV (ORCPT ); Wed, 19 Feb 2020 11:55:21 -0500 Received: from [5.158.153.53] (helo=tip-bot2.lab.linutronix.de) by Galois.linutronix.de with esmtpsa (TLS1.2:DHE_RSA_AES_256_CBC_SHA256:256) (Exim 4.80) (envelope-from ) id 1j4Sd2-0000GM-40; Wed, 19 Feb 2020 17:55:16 +0100 Received: from [127.0.1.1] (localhost [IPv6:::1]) by tip-bot2.lab.linutronix.de (Postfix) with ESMTP id B88D01C20C6; Wed, 19 Feb 2020 17:55:15 +0100 (CET) Date: Wed, 19 Feb 2020 16:55:15 -0000 From: "tip-bot2 for Arvind Sankar" Reply-to: linux-kernel@vger.kernel.org To: linux-tip-commits@vger.kernel.org Subject: [tip: x86/boot] x86/boot/compressed: Remove unnecessary sections from bzImage Cc: Arvind Sankar , Borislav Petkov , Kees Cook , x86 , LKML In-Reply-To: <20200109150218.16544-2-nivedita@alum.mit.edu> References: <20200109150218.16544-2-nivedita@alum.mit.edu> MIME-Version: 1.0 Message-ID: <158213131544.13786.16073593038276169304.tip-bot2@tip-bot2> X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-Linutronix-Spam-Score: -1.0 X-Linutronix-Spam-Level: - X-Linutronix-Spam-Status: No , -1.0 points, 5.0 required, ALL_TRUSTED=-1,SHORTCIRCUIT=-0.0001 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The following commit has been merged into the x86/boot branch of tip: Commit-ID: e11831d0ada3efc7f9268f35c80257f7e1b1dd0c Gitweb: https://git.kernel.org/tip/e11831d0ada3efc7f9268f35c80257f7e1b1dd0c Author: Arvind Sankar AuthorDate: Thu, 09 Jan 2020 10:02:18 -05:00 Committer: Borislav Petkov CommitterDate: Wed, 19 Feb 2020 17:35:30 +01:00 x86/boot/compressed: Remove unnecessary sections from bzImage Discarding the sections that are unused in the compressed kernel saves about 10 KiB on 32-bit and 6 KiB on 64-bit, mostly from .eh_frame. Signed-off-by: Arvind Sankar Signed-off-by: Borislav Petkov Acked-by: Kees Cook Link: https://lkml.kernel.org/r/20200109150218.16544-2-nivedita@alum.mit.edu --- arch/x86/boot/compressed/vmlinux.lds.S | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/x86/boot/compressed/vmlinux.lds.S b/arch/x86/boot/compressed/vmlinux.lds.S index 508cfa6..12a2060 100644 --- a/arch/x86/boot/compressed/vmlinux.lds.S +++ b/arch/x86/boot/compressed/vmlinux.lds.S @@ -73,4 +73,9 @@ SECTIONS #endif . = ALIGN(PAGE_SIZE); /* keep ZO size page aligned */ _end = .; + + /* Discard all remaining sections */ + /DISCARD/ : { + *(*) + } }