From patchwork Fri May 25 10:19:58 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sebastian Sewior X-Patchwork-Id: 10426939 X-Patchwork-Delegate: rjw@sisk.pl 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 C253C6032C for ; Fri, 25 May 2018 10:20:41 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id ABF012962A for ; Fri, 25 May 2018 10:20:41 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 9F39F29640; Fri, 25 May 2018 10:20:41 +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=-7.9 required=2.0 tests=BAYES_00, MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=unavailable 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 516542962A for ; Fri, 25 May 2018 10:20:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S936159AbeEYKUG (ORCPT ); Fri, 25 May 2018 06:20:06 -0400 Received: from Galois.linutronix.de ([146.0.238.70]:55289 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S936153AbeEYKUE (ORCPT ); Fri, 25 May 2018 06:20:04 -0400 Received: from localhost ([127.0.0.1] helo=bazinga.breakpoint.cc) by Galois.linutronix.de with esmtp (Exim 4.80) (envelope-from ) id 1fM9pK-00061r-6V; Fri, 25 May 2018 12:20:02 +0200 From: Sebastian Andrzej Siewior To: linux-pm@vger.kernel.org Cc: linux-kernel@vger.kernel.org, "Rafael J. Wysocki" , Viresh Kumar , "Paul E. McKenney" , Thomas Gleixner , bigeasy@linutronix.de Subject: [PATCH 2/2] cpufreq: Use static SRCU initializer Date: Fri, 25 May 2018 12:19:58 +0200 Message-Id: <20180525101958.13277-3-bigeasy@linutronix.de> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20180525101958.13277-1-bigeasy@linutronix.de> References: <20180525101958.13277-1-bigeasy@linutronix.de> MIME-Version: 1.0 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 Use the static SRCU initializer for `cpufreq_transition_notifier_list'. This avoids the init_cpufreq_transition_notifier_list() initcall. Its only purpose is to initialize the SRCU notifier once during boot and set another variable which is used as an indicator whether the init was perfromed before cpufreq_register_notifier() was used. Cc: "Rafael J. Wysocki" CC: Viresh Kumar Signed-off-by: Sebastian Andrzej Siewior Acked-by: Viresh Kumar --- drivers/cpufreq/cpufreq.c | 13 +------------ 1 file changed, 1 insertion(+), 12 deletions(-) diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index 075d18f6ba7a..3f7b502cfb1e 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -89,16 +89,7 @@ static void cpufreq_governor_limits(struct cpufreq_policy *policy); * The mutex locks both lists. */ static BLOCKING_NOTIFIER_HEAD(cpufreq_policy_notifier_list); -static struct srcu_notifier_head cpufreq_transition_notifier_list; - -static bool init_cpufreq_transition_notifier_list_called; -static int __init init_cpufreq_transition_notifier_list(void) -{ - srcu_init_notifier_head(&cpufreq_transition_notifier_list); - init_cpufreq_transition_notifier_list_called = true; - return 0; -} -pure_initcall(init_cpufreq_transition_notifier_list); +SRCU_NOTIFIER_HEAD_STATIC(cpufreq_transition_notifier_list); static int off __read_mostly; static int cpufreq_disabled(void) @@ -1764,8 +1755,6 @@ int cpufreq_register_notifier(struct notifier_block *nb, unsigned int list) if (cpufreq_disabled()) return -EINVAL; - WARN_ON(!init_cpufreq_transition_notifier_list_called); - switch (list) { case CPUFREQ_TRANSITION_NOTIFIER: mutex_lock(&cpufreq_fast_switch_lock);