From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752501AbcBECWl (ORCPT ); Thu, 4 Feb 2016 21:22:41 -0500 Received: from v094114.home.net.pl ([79.96.170.134]:44911 "HELO v094114.home.net.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1752319AbcBECVi (ORCPT ); Thu, 4 Feb 2016 21:21:38 -0500 From: "Rafael J. Wysocki" To: Linux PM list Cc: Linux Kernel Mailing List , Viresh Kumar , Srinivas Pandruvada , Juri Lelli , Steve Muckle , Saravana Kannan Subject: [PATCH v2 3/10] cpufreq: governor: Avoid passing dbs_data pointers around unnecessarily Date: Fri, 05 Feb 2016 03:15:24 +0100 Message-ID: <2409601.HbxMdSfn4m@vostro.rjw.lan> User-Agent: KMail/4.11.5 (Linux/4.5.0-rc1+; KDE/4.11.5; x86_64; ; ) In-Reply-To: <9008098.QDD8C89zDx@vostro.rjw.lan> References: <3705929.bslqXH980s@vostro.rjw.lan> <9008098.QDD8C89zDx@vostro.rjw.lan> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="utf-8" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Rafael J. Wysocki Do not pass struct dbs_data pointers to the family of functions implementing governor operations in cpufreq_governor.c as they can take that pointer from policy->governor by themselves. The cpufreq_governor_init() case is slightly more complicated, since policy->governor may be NULL when it is invoked, but then it can reach the pointer in question via its cdata argument just fine. While at it, rework cpufreq_governor_dbs() to avoid a pointless policy_governor check in the CPUFREQ_GOV_POLICY_INIT case. Signed-off-by: Rafael J. Wysocki --- drivers/cpufreq/cpufreq_governor.c | 68 ++++++++++++++----------------------- 1 file changed, 27 insertions(+), 41 deletions(-) Index: linux-pm/drivers/cpufreq/cpufreq_governor.c =================================================================== --- linux-pm.orig/drivers/cpufreq/cpufreq_governor.c +++ linux-pm/drivers/cpufreq/cpufreq_governor.c @@ -325,9 +325,9 @@ static void free_common_dbs_info(struct } static int cpufreq_governor_init(struct cpufreq_policy *policy, - struct dbs_data *dbs_data, struct common_dbs_data *cdata) { + struct dbs_data *dbs_data = cdata->gdbs_data; unsigned int latency; int ret; @@ -399,9 +399,9 @@ free_dbs_data: return ret; } -static int cpufreq_governor_exit(struct cpufreq_policy *policy, - struct dbs_data *dbs_data) +static int cpufreq_governor_exit(struct cpufreq_policy *policy) { + struct dbs_data *dbs_data = policy->governor_data; struct common_dbs_data *cdata = dbs_data->cdata; struct cpu_dbs_info *cdbs = cdata->get_cpu_cdbs(policy->cpu); @@ -428,9 +428,9 @@ static int cpufreq_governor_exit(struct return 0; } -static int cpufreq_governor_start(struct cpufreq_policy *policy, - struct dbs_data *dbs_data) +static int cpufreq_governor_start(struct cpufreq_policy *policy) { + struct dbs_data *dbs_data = policy->governor_data; struct common_dbs_data *cdata = dbs_data->cdata; unsigned int sampling_rate, ignore_nice, j, cpu = policy->cpu; struct cpu_dbs_info *cdbs = cdata->get_cpu_cdbs(cpu); @@ -497,9 +497,9 @@ static int cpufreq_governor_start(struct return 0; } -static int cpufreq_governor_stop(struct cpufreq_policy *policy, - struct dbs_data *dbs_data) +static int cpufreq_governor_stop(struct cpufreq_policy *policy) { + struct dbs_data *dbs_data = policy->governor_data; struct cpu_dbs_info *cdbs = dbs_data->cdata->get_cpu_cdbs(policy->cpu); struct cpu_common_dbs_info *shared = cdbs->shared; @@ -513,9 +513,9 @@ static int cpufreq_governor_stop(struct return 0; } -static int cpufreq_governor_limits(struct cpufreq_policy *policy, - struct dbs_data *dbs_data) +static int cpufreq_governor_limits(struct cpufreq_policy *policy) { + struct dbs_data *dbs_data = policy->governor_data; struct common_dbs_data *cdata = dbs_data->cdata; unsigned int cpu = policy->cpu; struct cpu_dbs_info *cdbs = cdata->get_cpu_cdbs(cpu); @@ -540,45 +540,31 @@ static int cpufreq_governor_limits(struc int cpufreq_governor_dbs(struct cpufreq_policy *policy, struct common_dbs_data *cdata, unsigned int event) { - struct dbs_data *dbs_data; - int ret; + int ret = -EINVAL; /* Lock governor to block concurrent initialization of governor */ mutex_lock(&dbs_data_mutex); - if (have_governor_per_policy()) - dbs_data = policy->governor_data; - else - dbs_data = cdata->gdbs_data; - - if (!dbs_data && (event != CPUFREQ_GOV_POLICY_INIT)) { - ret = -EINVAL; - goto unlock; - } - - switch (event) { - case CPUFREQ_GOV_POLICY_INIT: - ret = cpufreq_governor_init(policy, dbs_data, cdata); - break; - case CPUFREQ_GOV_POLICY_EXIT: - ret = cpufreq_governor_exit(policy, dbs_data); - break; - case CPUFREQ_GOV_START: - ret = cpufreq_governor_start(policy, dbs_data); - break; - case CPUFREQ_GOV_STOP: - ret = cpufreq_governor_stop(policy, dbs_data); - break; - case CPUFREQ_GOV_LIMITS: - ret = cpufreq_governor_limits(policy, dbs_data); - break; - default: - ret = -EINVAL; + if (event == CPUFREQ_GOV_POLICY_INIT) { + ret = cpufreq_governor_init(policy, cdata); + } else if (policy->governor_data) { + switch (event) { + case CPUFREQ_GOV_POLICY_EXIT: + ret = cpufreq_governor_exit(policy); + break; + case CPUFREQ_GOV_START: + ret = cpufreq_governor_start(policy); + break; + case CPUFREQ_GOV_STOP: + ret = cpufreq_governor_stop(policy); + break; + case CPUFREQ_GOV_LIMITS: + ret = cpufreq_governor_limits(policy); + break; + } } -unlock: mutex_unlock(&dbs_data_mutex); - return ret; } EXPORT_SYMBOL_GPL(cpufreq_governor_dbs);