From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S936092AbdGTMuR (ORCPT ); Thu, 20 Jul 2017 08:50:17 -0400 Received: from mx1.redhat.com ([209.132.183.28]:57940 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S935144AbdGTMuN (ORCPT ); Thu, 20 Jul 2017 08:50:13 -0400 DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 6AA233D941 Authentication-Results: ext-mx06.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx06.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=dhowells@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com 6AA233D941 Subject: [PATCH 0/5] Consolidate init_task handling From: David Howells To: mingo@kernel.org Cc: linux-arch@vger.kernel.org, dhowells@redhat.com, linux-ia64@vger.kernel.org, linux-kernel@vger.kernel.org Date: Thu, 20 Jul 2017 13:50:11 +0100 Message-ID: <150055501157.20414.14957264566013145790.stgit@warthog.procyon.org.uk> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.30]); Thu, 20 Jul 2017 12:50:13 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Ingo, Is this something that could be taken into the tip tree? It's a series of patches that consolidate init_task handling: (1) Alter the INIT_TASK_DATA linker script macro to set init_thread_union and init_stack rather than defining these in C. Insert init_task and init_thread_into into the init_stack area in the linker script as appropriate to the configuration, with different section markers so that they end up correctly ordered. We can then get merge ia64's init_task.c into the main one. We then have a bunch of single-use INIT_*() macros that seem only to be macros because they used to be used per-arch. We can then unroll these in place of the user and get rid of a few lines and a lot of backslashes. (2) Unroll INIT_TASK(). (3) Unroll various small INIT_*() macros that are defined conditionally. Unroll them and surround them by #if[n]def/#endif in the .c file as it takes fewer lines. (4) Unroll INIT_SIGNALS() and INIT_SIGHAND(). (5) Unroll INIT_STRUCT_PID. The patches can be found here also: http://git.kernel.org/cgit/linux/kernel/git/dhowells/linux-fs.git/log/?h=init_task David --- David Howells (5): Construct init thread stack in the linker script rather than by union Unroll INIT_TASK() in init/init_task.c Unroll various INIT_* macros Unroll the INIT_SIGNALS and INIT_SIGHAND macros Unroll INIT_STRUCT_PID arch/Kconfig | 4 arch/alpha/include/asm/thread_info.h | 3 arch/arc/include/asm/thread_info.h | 3 arch/arm/include/asm/thread_info.h | 3 arch/arm64/include/asm/thread_info.h | 2 arch/blackfin/include/asm/thread_info.h | 2 arch/c6x/include/asm/thread_info.h | 3 arch/cris/include/asm/processor.h | 2 arch/cris/include/asm/thread_info.h | 2 arch/frv/include/asm/thread_info.h | 3 arch/h8300/include/asm/thread_info.h | 3 arch/hexagon/include/asm/thread_info.h | 3 arch/ia64/Kconfig | 2 arch/ia64/Makefile | 2 arch/ia64/include/asm/thread_info.h | 4 arch/ia64/kernel/Makefile | 2 arch/ia64/kernel/init_task.c | 43 ----- arch/ia64/kernel/vmlinux.lds.S | 1 arch/m32r/include/asm/thread_info.h | 3 arch/m68k/include/asm/thread_info.h | 4 arch/metag/include/asm/thread_info.h | 3 arch/microblaze/include/asm/thread_info.h | 3 arch/mips/include/asm/thread_info.h | 3 arch/mn10300/include/asm/thread_info.h | 2 arch/nios2/include/asm/thread_info.h | 3 arch/openrisc/include/asm/processor.h | 2 arch/openrisc/include/asm/thread_info.h | 2 arch/parisc/include/asm/thread_info.h | 3 arch/powerpc/include/asm/thread_info.h | 3 arch/s390/include/asm/thread_info.h | 2 arch/score/include/asm/thread_info.h | 3 arch/sh/include/asm/thread_info.h | 3 arch/sparc/include/asm/thread_info_32.h | 3 arch/sparc/include/asm/thread_info_64.h | 3 arch/tile/include/asm/thread_info.h | 3 arch/um/include/asm/processor-generic.h | 2 arch/um/include/asm/thread_info.h | 9 - arch/um/include/asm/vmlinux.lds.h | 2 arch/um/kernel/dyn.lds.S | 2 arch/um/kernel/um_arch.c | 2 arch/um/kernel/uml.lds.S | 2 arch/unicore32/include/asm/thread_info.h | 3 arch/x86/include/asm/thread_info.h | 2 arch/xtensa/include/asm/thread_info.h | 3 include/asm-generic/vmlinux.lds.h | 4 include/linux/ftrace.h | 12 - include/linux/init_task.h | 264 +---------------------------- include/linux/irqflags.h | 2 include/linux/lockdep.h | 3 include/linux/sched.h | 9 + init/Makefile | 2 init/init_task.c | 173 ++++++++++++++++++- kernel/pid.c | 15 ++ 53 files changed, 219 insertions(+), 427 deletions(-) delete mode 100644 arch/ia64/kernel/init_task.c create mode 100644 arch/um/include/asm/vmlinux.lds.h