Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755662Ab0G1XsU (ORCPT ); Wed, 28 Jul 2010 19:48:20 -0400 Received: from mail-fx0-f46.google.com ([209.85.161.46]:33096 "EHLO mail-fx0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751768Ab0G1XsP (ORCPT ); Wed, 28 Jul 2010 19:48:15 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=googlemail.com; s=gamma; h=from:to:cc:subject:date:message-id:x-mailer; b=I/aIt7ccNX4kJ14PoSMPvRU9QfrhTghhM4vrvC4rQ2ZT2Xoncnq2dSPM7LgvUKDqDh bwOFdimVlYk9DozOdgcIgOpT97xpMVVr91U8ozdqKSmKO55eJufLkZ9iiysOGvxJPfZE cHlq2DRiIrFm6OqrZAKwhtgS9e3IPsP/JnZO8= From: Denys Vlasenko To: Michal Marek , linux-kbuild , linux-arch@vger.kernel.org, Parisc List Cc: lkml , Sam Ravnborg , Tim Abbott , Tim Bird , James Bottomley , Matt Fleming , Arnd Bergmann , Anders Kaseorg , Andi Kleen , Stephen Rothwell , Denys Vlasenko Subject: [PATCH 0/4] function/data-sections Date: Thu, 29 Jul 2010 01:47:52 +0200 Message-Id: <1280360876-2571-1-git-send-email-vda.linux@googlemail.com> X-Mailer: git-send-email 1.6.2.5 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3775 Lines: 81 Hi Michal, Please take this patch series onto linux-kbuild. Most of work needed for working -ffunction-sections -fdata-sections build is already in the mainline, but a few bits are still missing. In order to have a working kernel with this make invocation: make KCFLAGS="-ffunction-sections -fdata-sections" we need these patches: modpost: support objects with more than 64k sections This patch is in -mm, it still did not reach mainline, thus resending. Sam suggested some readability improvements. module linker script: coalesce function and data sections kernel linker stripts: accomodate function and data sections boot linker stripts: accomodate function and data sections Please see individual patches for more detailed changelogs. A rough idea what sort of size savings are achievable with section garbage collection: Kernel: text data bss dec hex filename 8299299 857324 785348 9941971 97b3d3 2.6.35-rc4/vmlinux 7566908 832388 717844 9117140 8b1dd4 2.6.35-rc4-fsgs/vmlinux -9.2% -2.9% -9.0% -8.6% The largest module in the build: 451009 54640 2224 507873 7bfe1 2.6.35-rc4/fs/xfs/xfs.ko 450521 54292 2202 507015 7bc87 2.6.35-rc4-fsgs/fs/xfs/xfs.ko (negligible size change since section garbage collection for modules is not done. TODO: figure out how to do it) Signed-off-by: Denys Vlasenko Acked-by: Sam Ravnborg Denys Vlasenko (4): modpost: support objects with more than 64k sections module linker script: coalesce sections kernel linker stripts: accomodate function and data sections boot linker stripts: accomodate function and data sections arch/alpha/boot/bootloader.lds | 6 +- arch/arm/boot/bootp/bootp.lds | 1 + arch/cris/boot/compressed/decompress_v10.lds | 3 + arch/cris/boot/compressed/decompress_v32.lds | 3 + arch/cris/boot/rescue/rescue_v10.lds | 2 + arch/cris/boot/rescue/rescue_v32.lds | 3 + arch/frv/kernel/vmlinux.lds.S | 1 - arch/h8300/boot/compressed/vmlinux.lds | 2 + arch/h8300/boot/compressed/vmlinux.scr | 1 + arch/ia64/hp/sim/boot/bootloader.lds | 6 +- arch/ia64/scripts/check-segrel.lds | 4 +- arch/m32r/boot/compressed/vmlinux.lds.S | 6 +- arch/m32r/boot/compressed/vmlinux.scr | 1 + arch/m68knommu/kernel/vmlinux.lds.S | 1 + arch/mips/lasat/image/romscript.normal | 1 + arch/mn10300/boot/compressed/vmlinux.lds | 1 + arch/parisc/kernel/vmlinux.lds.S | 1 + arch/powerpc/boot/zImage.coff.lds.S | 2 + arch/powerpc/boot/zImage.lds.S | 2 + arch/powerpc/boot/zImage.ps3.lds.S | 2 + arch/sh/boot/compressed/vmlinux.scr | 1 + arch/sh/kernel/vsyscall/vsyscall.lds.S | 2 +- arch/x86/boot/setup.ld | 3 +- arch/x86/kernel/acpi/realmode/wakeup.lds.S | 1 + arch/x86/kernel/vmlinux.lds.S | 1 + arch/xtensa/boot/boot-elf/boot.lds.S | 5 +- arch/xtensa/boot/boot-redboot/boot.ld | 5 +- include/asm-generic/vmlinux.lds.h | 18 ++++- scripts/mod/file2alias.c | 6 +- scripts/mod/modpost.c | 102 +++++++++++++++++++------- scripts/mod/modpost.h | 43 +++++++++++ scripts/module-common.lds | 23 ++++++ 32 files changed, 213 insertions(+), 46 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/