Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757274Ab3IPPKm (ORCPT ); Mon, 16 Sep 2013 11:10:42 -0400 Received: from mail-pd0-f173.google.com ([209.85.192.173]:46472 "EHLO mail-pd0-f173.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757207Ab3IPPKh (ORCPT ); Mon, 16 Sep 2013 11:10:37 -0400 From: Viresh Kumar To: rjw@sisk.pl, tixy@linaro.org Cc: linaro-kernel@lists.linaro.org, patches@linaro.org, cpufreq@vger.kernel.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, srivatsa.bhat@linux.vnet.ibm.com, Viresh Kumar Subject: [PATCH 2/2] cpufreq: make return type of lock_policy_rwsem_{read|write}() as void Date: Mon, 16 Sep 2013 20:40:17 +0530 Message-Id: X-Mailer: git-send-email 1.7.12.rc2.18.g61b472e In-Reply-To: <075032be4fd288074b8f699d4f4ba0179518df6f.1379344038.git.viresh.kumar@linaro.org> References: <075032be4fd288074b8f699d4f4ba0179518df6f.1379344038.git.viresh.kumar@linaro.org> In-Reply-To: <075032be4fd288074b8f699d4f4ba0179518df6f.1379344038.git.viresh.kumar@linaro.org> References: <075032be4fd288074b8f699d4f4ba0179518df6f.1379344038.git.viresh.kumar@linaro.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4443 Lines: 154 lock_policy_rwsem_{read|write}() currently has return type of int but it always return zero and hence its return type must be void instead. This patch makes its return type void and fixes all users of it as well. Reported-by: Jon Medhurst Signed-off-by: Viresh Kumar --- drivers/cpufreq/cpufreq.c | 38 +++++++++++--------------------------- 1 file changed, 11 insertions(+), 27 deletions(-) diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index c18bf7b..598af5c 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -67,13 +67,11 @@ static DEFINE_PER_CPU(char[CPUFREQ_NAME_LEN], cpufreq_cpu_governor); static DEFINE_PER_CPU(struct rw_semaphore, cpu_policy_rwsem); #define lock_policy_rwsem(mode, cpu) \ -static int lock_policy_rwsem_##mode(int cpu) \ +static void lock_policy_rwsem_##mode(int cpu) \ { \ struct cpufreq_policy *policy = per_cpu(cpufreq_cpu_data, cpu); \ BUG_ON(!policy); \ down_##mode(&per_cpu(cpu_policy_rwsem, policy->cpu)); \ - \ - return 0; \ } lock_policy_rwsem(read, cpu); @@ -653,13 +651,12 @@ static ssize_t show(struct kobject *kobj, struct attribute *attr, char *buf) { struct cpufreq_policy *policy = to_policy(kobj); struct freq_attr *fattr = to_attr(attr); - ssize_t ret = -EINVAL; + ssize_t ret; if (!down_read_trylock(&cpufreq_rwsem)) - goto exit; + return -EINVAL; - if (lock_policy_rwsem_read(policy->cpu) < 0) - goto up_read; + lock_policy_rwsem_read(policy->cpu); if (fattr->show) ret = fattr->show(policy, buf); @@ -667,10 +664,8 @@ static ssize_t show(struct kobject *kobj, struct attribute *attr, char *buf) ret = -EIO; unlock_policy_rwsem_read(policy->cpu); - -up_read: up_read(&cpufreq_rwsem); -exit: + return ret; } @@ -689,8 +684,7 @@ static ssize_t store(struct kobject *kobj, struct attribute *attr, if (!down_read_trylock(&cpufreq_rwsem)) goto unlock; - if (lock_policy_rwsem_write(policy->cpu) < 0) - goto up_read; + lock_policy_rwsem_write(policy->cpu); if (fattr->store) ret = fattr->store(policy, buf, count); @@ -699,7 +693,6 @@ static ssize_t store(struct kobject *kobj, struct attribute *attr, unlock_policy_rwsem_write(policy->cpu); -up_read: up_read(&cpufreq_rwsem); unlock: put_online_cpus(); @@ -1143,7 +1136,7 @@ static int cpufreq_nominate_new_policy_cpu(struct cpufreq_policy *policy, if (ret) { pr_err("%s: Failed to move kobj: %d", __func__, ret); - WARN_ON(lock_policy_rwsem_write(old_cpu)); + lock_policy_rwsem_write(old_cpu); cpumask_set_cpu(old_cpu, policy->cpus); unlock_policy_rwsem_write(old_cpu); @@ -1196,7 +1189,7 @@ static int __cpufreq_remove_dev_prepare(struct device *dev, policy->governor->name, CPUFREQ_NAME_LEN); #endif - WARN_ON(lock_policy_rwsem_write(cpu)); + lock_policy_rwsem_write(cpu); cpus = cpumask_weight(policy->cpus); if (cpus > 1) @@ -1459,14 +1452,11 @@ unsigned int cpufreq_get(unsigned int cpu) if (!down_read_trylock(&cpufreq_rwsem)) return 0; - if (unlikely(lock_policy_rwsem_read(cpu))) - goto out_policy; + lock_policy_rwsem_read(cpu); ret_freq = __cpufreq_get(cpu); unlock_policy_rwsem_read(cpu); - -out_policy: up_read(&cpufreq_rwsem); return ret_freq; @@ -1690,14 +1680,12 @@ int cpufreq_driver_target(struct cpufreq_policy *policy, { int ret = -EINVAL; - if (unlikely(lock_policy_rwsem_write(policy->cpu))) - goto fail; + lock_policy_rwsem_write(policy->cpu); ret = __cpufreq_driver_target(policy, target_freq, relation); unlock_policy_rwsem_write(policy->cpu); -fail: return ret; } EXPORT_SYMBOL_GPL(cpufreq_driver_target); @@ -1988,10 +1976,7 @@ int cpufreq_update_policy(unsigned int cpu) goto no_policy; } - if (unlikely(lock_policy_rwsem_write(cpu))) { - ret = -EINVAL; - goto fail; - } + lock_policy_rwsem_write(cpu); pr_debug("updating policy for CPU %u\n", cpu); memcpy(&new_policy, policy, sizeof(*policy)); @@ -2020,7 +2005,6 @@ int cpufreq_update_policy(unsigned int cpu) unlock_policy_rwsem_write(cpu); -fail: cpufreq_cpu_put(policy); no_policy: return ret; -- 1.7.12.rc2.18.g61b472e -- 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/