From mboxrd@z Thu Jan 1 00:00:00 1970 From: Nicholas Piggin Subject: [PATCH 0/4] LD_DEAD_CODE_DATA_ELIMINATION fixes and enabling for powerpc Date: Fri, 20 Apr 2018 17:34:10 +1000 Message-ID: <20180420073414.23169-1-npiggin@gmail.com> Return-path: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: linuxppc-dev-bounces+glppe-linuxppc-embedded-2=m.gmane.org@lists.ozlabs.org Sender: "Linuxppc-dev" To: linuxppc-dev@lists.ozlabs.org Cc: linux-arch@vger.kernel.org, Nicolas Pitre , Nicholas Piggin , linux-kbuild@vger.kernel.org List-Id: linux-arch.vger.kernel.org A few people have been interested in this again. And I promised if it remains dead code it should be removed, so I would like to have another try. I think I got snagged on the modules problem last time and did not take the time to work it out, this time I just turned off the compile options for modules (the linker option was never set anyway so no loss). This includes some linker script catches and ideas from others, I didn't documnt them all, but thanks for looking. I would be interested to help other archs get this working too, if anybody needs some help. Thanks, Nick Nicholas Piggin (4): kbuild: Fix asm-generic/vmlinux.lds.h for LD_DEAD_CODE_DATA_ELIMINATION kbuild: LD_DEAD_CODE_DATA_ELIMINATION no -ffunction-sections/-fdata-sections for module build kbuild: Allow LD_DEAD_CODE_DATA_ELIMINATION to be selectable if enabled powerpc: Allow LD_DEAD_CODE_DATA_ELIMINATION to be selected Makefile | 4 +-- arch/Kconfig | 15 ---------- arch/powerpc/Kconfig | 1 + arch/powerpc/kernel/vmlinux.lds.S | 22 +++++++------- include/asm-generic/vmlinux.lds.h | 49 ++++++++++++++++++------------- init/Kconfig | 27 +++++++++++++++++ 6 files changed, 70 insertions(+), 48 deletions(-) -- 2.17.0 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pg0-f65.google.com ([74.125.83.65]:35856 "EHLO mail-pg0-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753964AbeDTHe1 (ORCPT ); Fri, 20 Apr 2018 03:34:27 -0400 From: Nicholas Piggin Subject: [PATCH 0/4] LD_DEAD_CODE_DATA_ELIMINATION fixes and enabling for powerpc Date: Fri, 20 Apr 2018 17:34:10 +1000 Message-ID: <20180420073414.23169-1-npiggin@gmail.com> Sender: linux-arch-owner@vger.kernel.org List-ID: To: linuxppc-dev@lists.ozlabs.org Cc: Nicholas Piggin , linux-arch@vger.kernel.org, linux-kbuild@vger.kernel.org, Christophe Leroy , Nicolas Pitre Message-ID: <20180420073410.pRBDKIDOAf8G1oy3hkCUR6_MpsE2VagEk8JXQ0W4DzE@z> A few people have been interested in this again. And I promised if it remains dead code it should be removed, so I would like to have another try. I think I got snagged on the modules problem last time and did not take the time to work it out, this time I just turned off the compile options for modules (the linker option was never set anyway so no loss). This includes some linker script catches and ideas from others, I didn't documnt them all, but thanks for looking. I would be interested to help other archs get this working too, if anybody needs some help. Thanks, Nick Nicholas Piggin (4): kbuild: Fix asm-generic/vmlinux.lds.h for LD_DEAD_CODE_DATA_ELIMINATION kbuild: LD_DEAD_CODE_DATA_ELIMINATION no -ffunction-sections/-fdata-sections for module build kbuild: Allow LD_DEAD_CODE_DATA_ELIMINATION to be selectable if enabled powerpc: Allow LD_DEAD_CODE_DATA_ELIMINATION to be selected Makefile | 4 +-- arch/Kconfig | 15 ---------- arch/powerpc/Kconfig | 1 + arch/powerpc/kernel/vmlinux.lds.S | 22 +++++++------- include/asm-generic/vmlinux.lds.h | 49 ++++++++++++++++++------------- init/Kconfig | 27 +++++++++++++++++ 6 files changed, 70 insertions(+), 48 deletions(-) -- 2.17.0