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=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, 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 595D1C282DD for ; Thu, 9 Jan 2020 15:02:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 38BB12077B for ; Thu, 9 Jan 2020 15:02:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730608AbgAIPCY (ORCPT ); Thu, 9 Jan 2020 10:02:24 -0500 Received: from mail-qv1-f68.google.com ([209.85.219.68]:33927 "EHLO mail-qv1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730273AbgAIPCW (ORCPT ); Thu, 9 Jan 2020 10:02:22 -0500 Received: by mail-qv1-f68.google.com with SMTP id o18so3081122qvf.1 for ; Thu, 09 Jan 2020 07:02:21 -0800 (PST) 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:in-reply-to :references:mime-version:content-transfer-encoding; bh=kq0gWjFvasYsms+f/wE6GRRcFpiCXufjwhyt2Hb0yVU=; b=DEZVAly1nipDho5rwZxCz+fYCqHamOfa8Asgm0/xPo2c0q+OWVsABBil6mVC1VSg9o XAbq8Wy4myMiec7340PMgZBYuB5zUku0QQNRBwlOOZEWIhyf9ZrpeuwtZzZ1J686guhj 34R4S/xzCYRSqcCt/8/PyZTvpbjI+d+jbwnDvFhTUJT1Opwga/gOBdNumCi1NywaS2nF Tm1W5q7ksPjZJDUxARqSqvK9KgkV+NcpXrV4zhie1zu2p9+UEJ2S9b3ZVBbVugv2lv8P e1Oo2rXAXriOg0GWxtEkJb6ANHQr8PJjm04xCVwNerjtuNHpu0Jh5/hF2gA0DJb0r4EN SxOQ== X-Gm-Message-State: APjAAAVDTEvFm8X5NwKyqxJWphCGbCsGZeQfjk0rl1DHMXuU+QW4LhfL BNXshPcP9SDj8MiV/tJZbhc= X-Google-Smtp-Source: APXvYqzAbTu+pnRg6HwaDPyoSqbHllys/+WgvuiHUYYRqiWGhj1drhijbNCXTD84M6TWwCSmw0JF8g== X-Received: by 2002:ad4:5562:: with SMTP id w2mr9248570qvy.147.1578582141192; Thu, 09 Jan 2020 07:02:21 -0800 (PST) Received: from rani.riverdale.lan ([2001:470:1f07:5f3::b55f]) by smtp.gmail.com with ESMTPSA id t73sm3217837qke.71.2020.01.09.07.02.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 09 Jan 2020 07:02:20 -0800 (PST) From: Arvind Sankar To: Thomas Gleixner , Ingo Molnar , Borislav Petkov , "H. Peter Anvin" Cc: x86@kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 2/2] x86/boot/compressed: Remove unnecessary sections from bzImage Date: Thu, 9 Jan 2020 10:02:18 -0500 Message-Id: <20200109150218.16544-2-nivedita@alum.mit.edu> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20200109150218.16544-1-nivedita@alum.mit.edu> References: <20200109150218.16544-1-nivedita@alum.mit.edu> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 --- 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 508cfa6828c5..12a20603d92e 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/ : { + *(*) + } } -- 2.24.1