From patchwork Mon Jun 27 09:26:15 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jisheng Zhang X-Patchwork-Id: 9200135 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id E92BB60B16 for ; Mon, 27 Jun 2016 09:30:45 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D4CB628470 for ; Mon, 27 Jun 2016 09:30:45 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id C92E928578; Mon, 27 Jun 2016 09:30:45 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id ACD5B28488 for ; Mon, 27 Jun 2016 09:30:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751738AbcF0Jaf (ORCPT ); Mon, 27 Jun 2016 05:30:35 -0400 Received: from mx0b-0016f401.pphosted.com ([67.231.156.173]:60107 "EHLO mx0b-0016f401.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751590AbcF0JaT (ORCPT ); Mon, 27 Jun 2016 05:30:19 -0400 Received: from pps.filterd (m0045851.ppops.net [127.0.0.1]) by mx0b-0016f401.pphosted.com (8.16.0.17/8.16.0.17) with SMTP id u5R9RH1Q009101; Mon, 27 Jun 2016 02:30:13 -0700 Received: from sc-exch04.marvell.com ([199.233.58.184]) by mx0b-0016f401.pphosted.com with ESMTP id 23ssfend40-11 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-SHA384 bits=256 verify=NOT); Mon, 27 Jun 2016 02:30:13 -0700 Received: from SC-EXCH02.marvell.com (10.93.176.82) by SC-EXCH04.marvell.com (10.93.176.84) with Microsoft SMTP Server (TLS) id 15.0.1104.5; Mon, 27 Jun 2016 02:30:10 -0700 Received: from maili.marvell.com (10.93.176.43) by SC-EXCH02.marvell.com (10.93.176.82) with Microsoft SMTP Server id 15.0.1104.5 via Frontend Transport; Mon, 27 Jun 2016 02:30:10 -0700 Received: from xhacker.marvell.com (unknown [10.37.130.171]) by maili.marvell.com (Postfix) with ESMTP id 5195F3F703F; Mon, 27 Jun 2016 02:30:09 -0700 (PDT) From: Jisheng Zhang To: , , , CC: , , Jisheng Zhang Subject: [PATCH 3/3] intel_pstate: Declare pid_params/pstate_funcs/hwp_active __read_mostly Date: Mon, 27 Jun 2016 17:26:15 +0800 Message-ID: <1467019575-664-4-git-send-email-jszhang@marvell.com> X-Mailer: git-send-email 2.8.1 In-Reply-To: <1467019575-664-1-git-send-email-jszhang@marvell.com> References: <1467019575-664-1-git-send-email-jszhang@marvell.com> MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2016-06-27_06:, , signatures=0 X-Proofpoint-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=0 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1604210000 definitions=main-1606270107 Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP pid_params is written once by copy_pid_params() during initialization, and thereafter is mostly read by hot path intel_pstate_update_util(). The read of pid_params gets more after commit a4675fbc4a7a ("cpufreq: intel_pstate: Replace timers with utilization update callbacks") pstate_funcs is written once by copy_cpu_funcs() during initialization, and thereafter is mostly read by hot path intel_pstate_update_util() hwp_active is written to once and thereafter is read by the driver during initialization and thereafter is mostly read by hot path intel_pstate_update_util(). The fact that they are mostly read and not written to makes them candidates for __read_mostly declarations. Signed-off-by: Jisheng Zhang --- drivers/cpufreq/intel_pstate.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c index 861bcba..2eda50d 100644 --- a/drivers/cpufreq/intel_pstate.c +++ b/drivers/cpufreq/intel_pstate.c @@ -281,9 +281,9 @@ struct cpu_defaults { static inline int32_t get_target_pstate_use_performance(struct cpudata *cpu); static inline int32_t get_target_pstate_use_cpu_load(struct cpudata *cpu); -static struct pstate_adjust_policy pid_params; -static struct pstate_funcs pstate_funcs; -static int hwp_active; +static struct pstate_adjust_policy pid_params __read_mostly; +static struct pstate_funcs pstate_funcs __read_mostly; +static int hwp_active __read_mostly; #ifdef CONFIG_ACPI static bool acpi_ppc;