Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754578Ab3JHHq5 (ORCPT ); Tue, 8 Oct 2013 03:46:57 -0400 Received: from us02smtp2.synopsys.com ([198.182.60.77]:39174 "EHLO alvesta.synopsys.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751885Ab3JHHqy (ORCPT ); Tue, 8 Oct 2013 03:46:54 -0400 From: Vineet Gupta To: Ingo Molnar , Peter Zijlstra , Andrew Morton , Paul Mundt CC: , , Vineet Gupta Subject: [PATCH v2 0/3] Move ARCH specific fpu_counter out of task_struct Date: Tue, 8 Oct 2013 13:16:26 +0530 Message-ID: <1381218389-16585-1-git-send-email-vgupta@synopsys.com> X-Mailer: git-send-email 1.8.1.2 MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.12.197.243] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1876 Lines: 51 Hi, When debugging a ARC SMP 3.11 build failure due to a ST insn dealing with task_struct.thread going out of range, I spotted @fpu_counter in task_struct which only SH/x86 happen to use, and can be easily moved out into corresponding ARCH specific thread_struct. This saves 4 bytes per task_struct instantiated, for all the other 18 arches. While the change is relatively strightforward, I've failed to connect with SH arch folks / Paul Mundt, latter's SH email keeps bouncing back. Hence I'm taking the liberty to use his alternate email (as listed on his github page) and I appologize in advance if this causes any inconvenience. Changes in v2: - Rabased to 3.12-rc4 - Added ACK from Ingo on patch 2/3 Version 1 can be found here: https://lkml.org/lkml/2013/9/17/49 Thx, -Vineet Vineet Gupta (3): sh: Move fpu_counter into ARCH specific thread_struct x86: Move fpu_counter into ARCH specific thread_struct sched: Remove ARCH specific fpu_counter from task_struct arch/sh/include/asm/fpu.h | 2 +- arch/sh/include/asm/processor_32.h | 10 ++++++++++ arch/sh/include/asm/processor_64.h | 10 ++++++++++ arch/sh/kernel/cpu/fpu.c | 2 +- arch/sh/kernel/process_32.c | 6 +++--- arch/x86/include/asm/fpu-internal.h | 10 +++++----- arch/x86/include/asm/processor.h | 9 +++++++++ arch/x86/kernel/i387.c | 2 +- arch/x86/kernel/process_32.c | 4 ++-- arch/x86/kernel/process_64.c | 2 +- arch/x86/kernel/traps.c | 2 +- include/linux/sched.h | 9 --------- 12 files changed, 44 insertions(+), 24 deletions(-) -- 1.8.1.2 -- 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/