NFS: Kill the obsolete NFS_PARANOIA

[powerpc.git] / drivers / cpufreq / cpufreq_ondemand.c

diff --git a/drivers/cpufreq/cpufreq_ondemand.c b/drivers/cpufreq/cpufreq_ondemand.c
index a480834..8532bb7 100644 (file)
--- a/drivers/cpufreq/cpufreq_ondemand.c
+++ b/drivers/cpufreq/cpufreq_ondemand.c
@@ -432,13 +432,16 @@ static void do_dbs_timer(struct work_struct *work)
        /* We want all CPUs to do sampling nearly on same jiffy */
        int delay = usecs_to_jiffies(dbs_tuners_ins.sampling_rate);
 
-       /* Permit rescheduling of this work item */
-       work_release(work);
-
        delay -= jiffies % delay;
 
-       if (!dbs_info->enable)
+       if (lock_policy_rwsem_write(cpu) < 0)
+               return;
+
+       if (!dbs_info->enable) {
+               unlock_policy_rwsem_write(cpu);
                return;
+       }
+
        /* Common NORMAL_SAMPLE setup */
        dbs_info->sample_type = DBS_NORMAL_SAMPLE;
        if (!dbs_tuners_ins.powersave_bias ||
@@ -455,6 +458,7 @@ static void do_dbs_timer(struct work_struct *work)
                                        CPUFREQ_RELATION_H);
        }
        queue_delayed_work_on(cpu, kondemand_wq, &dbs_info->work, delay);
+       unlock_policy_rwsem_write(cpu);
 }
 
 static inline void dbs_timer_init(struct cpu_dbs_info_s *dbs_info)
@@ -463,9 +467,10 @@ static inline void dbs_timer_init(struct cpu_dbs_info_s *dbs_info)
        int delay = usecs_to_jiffies(dbs_tuners_ins.sampling_rate);
        delay -= jiffies % delay;
 
+       dbs_info->enable = 1;
        ondemand_powersave_bias_init();
        dbs_info->sample_type = DBS_NORMAL_SAMPLE;
-       INIT_DELAYED_WORK_NAR(&dbs_info->work, do_dbs_timer);
+       INIT_DELAYED_WORK_DEFERRABLE(&dbs_info->work, do_dbs_timer);
        queue_delayed_work_on(dbs_info->cpu, kondemand_wq, &dbs_info->work,
                              delay);
 }
@@ -474,7 +479,6 @@ static inline void dbs_timer_exit(struct cpu_dbs_info_s *dbs_info)
 {
        dbs_info->enable = 0;
        cancel_delayed_work(&dbs_info->work);
-       flush_workqueue(kondemand_wq);
 }
 
 static int cpufreq_governor_dbs(struct cpufreq_policy *policy,
@@ -503,21 +507,9 @@ static int cpufreq_governor_dbs(struct cpufreq_policy *policy,
 
                mutex_lock(&dbs_mutex);
                dbs_enable++;
-               if (dbs_enable == 1) {
-                       kondemand_wq = create_workqueue("kondemand");
-                       if (!kondemand_wq) {
-                               printk(KERN_ERR
-                                        "Creation of kondemand failed\n");
-                               dbs_enable--;
-                               mutex_unlock(&dbs_mutex);
-                               return -ENOSPC;
-                       }
-               }
 
                rc = sysfs_create_group(&policy->kobj, &dbs_attr_group);
                if (rc) {
-                       if (dbs_enable == 1)
-                               destroy_workqueue(kondemand_wq);
                        dbs_enable--;
                        mutex_unlock(&dbs_mutex);
                        return rc;
@@ -532,7 +524,6 @@ static int cpufreq_governor_dbs(struct cpufreq_policy *policy,
                        j_dbs_info->prev_cpu_wall = get_jiffies_64();
                }
                this_dbs_info->cpu = cpu;
-               this_dbs_info->enable = 1;
                /*
                 * Start the timerschedule work, when this governor
                 * is used for first time
@@ -562,9 +553,6 @@ static int cpufreq_governor_dbs(struct cpufreq_policy *policy,
                dbs_timer_exit(this_dbs_info);
                sysfs_remove_group(&policy->kobj, &dbs_attr_group);
                dbs_enable--;
-               if (dbs_enable == 0)
-                       destroy_workqueue(kondemand_wq);
-
                mutex_unlock(&dbs_mutex);
 
                break;
@@ -593,12 +581,18 @@ static struct cpufreq_governor cpufreq_gov_dbs = {
 
 static int __init cpufreq_gov_dbs_init(void)
 {
+       kondemand_wq = create_workqueue("kondemand");
+       if (!kondemand_wq) {
+               printk(KERN_ERR "Creation of kondemand failed\n");
+               return -EFAULT;
+       }
        return cpufreq_register_governor(&cpufreq_gov_dbs);
 }
 
 static void __exit cpufreq_gov_dbs_exit(void)
 {
        cpufreq_unregister_governor(&cpufreq_gov_dbs);
+       destroy_workqueue(kondemand_wq);
 }
 
 
@@ -610,3 +604,4 @@ MODULE_LICENSE("GPL");
 
 module_init(cpufreq_gov_dbs_init);
 module_exit(cpufreq_gov_dbs_exit);
+