[CPUFREQ] change cpu freq arrays to per_cpu variables

Change cpufreq_policy and cpufreq_governor pointer tables
from arrays to per_cpu variables in the cpufreq subsystem.

Also some minor complaints from checkpatch.pl fixed.

Based on:
	git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git
	git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86.git

Signed-off-by: Mike Travis <travis@sgi.com>
Signed-off-by: Dave Jones <davej@redhat.com>

3 files changed, 42 insertions, 39 deletions

diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index 7fce038fa57e..6b73d163fa83 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -38,10 +38,10 @@
  * also protects the cpufreq_cpu_data array.
  */
 static struct cpufreq_driver *cpufreq_driver;
-static struct cpufreq_policy *cpufreq_cpu_data[NR_CPUS];
+static DEFINE_PER_CPU(struct cpufreq_policy *, cpufreq_cpu_data);
 #ifdef CONFIG_HOTPLUG_CPU
 /* This one keeps track of the previously set governor of a removed CPU */
-static struct cpufreq_governor *cpufreq_cpu_governor[NR_CPUS];
+static DEFINE_PER_CPU(struct cpufreq_governor *, cpufreq_cpu_governor);
 #endif
 static DEFINE_SPINLOCK(cpufreq_driver_lock);
 
@@ -135,7 +135,7 @@ struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu)
         struct cpufreq_policy *data;
         unsigned long flags;
 
-        if (cpu >= NR_CPUS)
+        if (cpu >= nr_cpu_ids)
                 goto err_out;
 
         /* get the cpufreq driver */
@@ -149,7 +149,7 @@ struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu)
 
 
         /* get the CPU */
-        data = cpufreq_cpu_data[cpu];
+        data = per_cpu(cpufreq_cpu_data, cpu);
 
         if (!data)
                 goto err_out_put_module;
@@ -327,7 +327,7 @@ void cpufreq_notify_transition(struct cpufreq_freqs *freqs, unsigned int state)
         dprintk("notification %u of frequency transition to %u kHz\n",
                 state, freqs->new);
 
-        policy = cpufreq_cpu_data[freqs->cpu];
+        policy = per_cpu(cpufreq_cpu_data, freqs->cpu);
         switch (state) {
 
         case CPUFREQ_PRECHANGE:
@@ -828,8 +828,8 @@ static int cpufreq_add_dev(struct sys_device *sys_dev)
 #ifdef CONFIG_SMP
 
 #ifdef CONFIG_HOTPLUG_CPU
-        if (cpufreq_cpu_governor[cpu]){
-                policy->governor = cpufreq_cpu_governor[cpu];
+        if (per_cpu(cpufreq_cpu_governor, cpu)) {
+                policy->governor = per_cpu(cpufreq_cpu_governor, cpu);
                 dprintk("Restoring governor %s for cpu %d\n",
                        policy->governor->name, cpu);
         }
@@ -854,7 +854,7 @@ static int cpufreq_add_dev(struct sys_device *sys_dev)
 
                         spin_lock_irqsave(&cpufreq_driver_lock, flags);
                         managed_policy->cpus = policy->cpus;
-                        cpufreq_cpu_data[cpu] = managed_policy;
+                        per_cpu(cpufreq_cpu_data, cpu) = managed_policy;
                         spin_unlock_irqrestore(&cpufreq_driver_lock, flags);
 
                         dprintk("CPU already managed, adding link\n");
@@ -899,7 +899,7 @@ static int cpufreq_add_dev(struct sys_device *sys_dev)
 
         spin_lock_irqsave(&cpufreq_driver_lock, flags);
         for_each_cpu_mask(j, policy->cpus) {
-                cpufreq_cpu_data[j] = policy;
+                per_cpu(cpufreq_cpu_data, j) = policy;
                 per_cpu(policy_cpu, j) = policy->cpu;
         }
         spin_unlock_irqrestore(&cpufreq_driver_lock, flags);
@@ -946,7 +946,7 @@ static int cpufreq_add_dev(struct sys_device *sys_dev)
 err_out_unregister:
         spin_lock_irqsave(&cpufreq_driver_lock, flags);
         for_each_cpu_mask(j, policy->cpus)
-                cpufreq_cpu_data[j] = NULL;
+                per_cpu(cpufreq_cpu_data, j) = NULL;
         spin_unlock_irqrestore(&cpufreq_driver_lock, flags);
 
         kobject_put(&policy->kobj);
@@ -989,7 +989,7 @@ static int __cpufreq_remove_dev(struct sys_device *sys_dev)
         dprintk("unregistering CPU %u\n", cpu);
 
         spin_lock_irqsave(&cpufreq_driver_lock, flags);
-        data = cpufreq_cpu_data[cpu];
+        data = per_cpu(cpufreq_cpu_data, cpu);
 
         if (!data) {
                 spin_unlock_irqrestore(&cpufreq_driver_lock, flags);
@@ -997,7 +997,7 @@ static int __cpufreq_remove_dev(struct sys_device *sys_dev)
                 unlock_policy_rwsem_write(cpu);
                 return -EINVAL;
         }
-        cpufreq_cpu_data[cpu] = NULL;
+        per_cpu(cpufreq_cpu_data, cpu) = NULL;
 
 
 #ifdef CONFIG_SMP
@@ -1019,19 +1019,19 @@ static int __cpufreq_remove_dev(struct sys_device *sys_dev)
 #ifdef CONFIG_SMP
 
 #ifdef CONFIG_HOTPLUG_CPU
-        cpufreq_cpu_governor[cpu] = data->governor;
+        per_cpu(cpufreq_cpu_governor, cpu) = data->governor;
 #endif
 
         /* if we have other CPUs still registered, we need to unlink them,
          * or else wait_for_completion below will lock up. Clean the
-         * cpufreq_cpu_data[] while holding the lock, and remove the sysfs
-         * links afterwards.
+         * per_cpu(cpufreq_cpu_data) while holding the lock, and remove
+         * the sysfs links afterwards.
          */
         if (unlikely(cpus_weight(data->cpus) > 1)) {
                 for_each_cpu_mask(j, data->cpus) {
                         if (j == cpu)
                                 continue;
-                        cpufreq_cpu_data[j] = NULL;
+                        per_cpu(cpufreq_cpu_data, j) = NULL;
                 }
         }
 
@@ -1043,7 +1043,7 @@ static int __cpufreq_remove_dev(struct sys_device *sys_dev)
                                 continue;
                         dprintk("removing link for cpu %u\n", j);
 #ifdef CONFIG_HOTPLUG_CPU
-                        cpufreq_cpu_governor[j] = data->governor;
+                        per_cpu(cpufreq_cpu_governor, j) = data->governor;
 #endif
                         cpu_sys_dev = get_cpu_sysdev(j);
                         sysfs_remove_link(&cpu_sys_dev->kobj, "cpufreq");
@@ -1153,7 +1153,7 @@ EXPORT_SYMBOL(cpufreq_quick_get);
 
 static unsigned int __cpufreq_get(unsigned int cpu)
 {
-        struct cpufreq_policy *policy = cpufreq_cpu_data[cpu];
+        struct cpufreq_policy *policy = per_cpu(cpufreq_cpu_data, cpu);
         unsigned int ret_freq = 0;
 
         if (!cpufreq_driver->get)
@@ -1822,16 +1822,19 @@ int cpufreq_register_driver(struct cpufreq_driver *driver_data)
         cpufreq_driver = driver_data;
         spin_unlock_irqrestore(&cpufreq_driver_lock, flags);
 
-        ret = sysdev_driver_register(&cpu_sysdev_class,&cpufreq_sysdev_driver);
+        ret = sysdev_driver_register(&cpu_sysdev_class,
+                                        &cpufreq_sysdev_driver);
 
         if ((!ret) && !(cpufreq_driver->flags & CPUFREQ_STICKY)) {
                 int i;
                 ret = -ENODEV;
 
                 /* check for at least one working CPU */
-                for (i=0; i<NR_CPUS; i++)
-                        if (cpufreq_cpu_data[i])
+                for (i = 0; i < nr_cpu_ids; i++)
+                        if (cpu_possible(i) && per_cpu(cpufreq_cpu_data, i)) {
                                 ret = 0;
+                                break;
+                        }
 
                 /* if all ->init() calls failed, unregister */
                 if (ret) {
diff --git a/drivers/cpufreq/cpufreq_stats.c b/drivers/cpufreq/cpufreq_stats.c
index ae70d63a8b26..c0ff97d375d7 100644
--- a/drivers/cpufreq/cpufreq_stats.c
+++ b/drivers/cpufreq/cpufreq_stats.c
@@ -43,7 +43,7 @@ struct cpufreq_stats {
 #endif
 };
 
-static struct cpufreq_stats *cpufreq_stats_table[NR_CPUS];
+static DEFINE_PER_CPU(struct cpufreq_stats *, cpufreq_stats_table);
 
 struct cpufreq_stats_attribute {
         struct attribute attr;
@@ -58,7 +58,7 @@ cpufreq_stats_update (unsigned int cpu)
 
         cur_time = get_jiffies_64();
         spin_lock(&cpufreq_stats_lock);
-        stat = cpufreq_stats_table[cpu];
+        stat = per_cpu(cpufreq_stats_table, cpu);
         if (stat->time_in_state)
                 stat->time_in_state[stat->last_index] =
                         cputime64_add(stat->time_in_state[stat->last_index],
@@ -71,11 +71,11 @@ cpufreq_stats_update (unsigned int cpu)
 static ssize_t
 show_total_trans(struct cpufreq_policy *policy, char *buf)
 {
-        struct cpufreq_stats *stat = cpufreq_stats_table[policy->cpu];
+        struct cpufreq_stats *stat = per_cpu(cpufreq_stats_table, policy->cpu);
         if (!stat)
                 return 0;
         return sprintf(buf, "%d\n",
-                        cpufreq_stats_table[stat->cpu]->total_trans);
+                        per_cpu(cpufreq_stats_table, stat->cpu)->total_trans);
 }
 
 static ssize_t
@@ -83,7 +83,7 @@ show_time_in_state(struct cpufreq_policy *policy, char *buf)
 {
         ssize_t len = 0;
         int i;
-        struct cpufreq_stats *stat = cpufreq_stats_table[policy->cpu];
+        struct cpufreq_stats *stat = per_cpu(cpufreq_stats_table, policy->cpu);
         if (!stat)
                 return 0;
         cpufreq_stats_update(stat->cpu);
@@ -101,7 +101,7 @@ show_trans_table(struct cpufreq_policy *policy, char *buf)
         ssize_t len = 0;
         int i, j;
 
-        struct cpufreq_stats *stat = cpufreq_stats_table[policy->cpu];
+        struct cpufreq_stats *stat = per_cpu(cpufreq_stats_table, policy->cpu);
         if (!stat)
                 return 0;
         cpufreq_stats_update(stat->cpu);
@@ -170,7 +170,7 @@ freq_table_get_index(struct cpufreq_stats *stat, unsigned int freq)
 
 static void cpufreq_stats_free_table(unsigned int cpu)
 {
-        struct cpufreq_stats *stat = cpufreq_stats_table[cpu];
+        struct cpufreq_stats *stat = per_cpu(cpufreq_stats_table, cpu);
         struct cpufreq_policy *policy = cpufreq_cpu_get(cpu);
         if (policy && policy->cpu == cpu)
                 sysfs_remove_group(&policy->kobj, &stats_attr_group);
@@ -178,7 +178,7 @@ static void cpufreq_stats_free_table(unsigned int cpu)
                 kfree(stat->time_in_state);
                 kfree(stat);
         }
-        cpufreq_stats_table[cpu] = NULL;
+        per_cpu(cpufreq_stats_table, cpu) = NULL;
         if (policy)
                 cpufreq_cpu_put(policy);
 }
@@ -192,7 +192,7 @@ cpufreq_stats_create_table (struct cpufreq_policy *policy,
         struct cpufreq_policy *data;
         unsigned int alloc_size;
         unsigned int cpu = policy->cpu;
-        if (cpufreq_stats_table[cpu])
+        if (per_cpu(cpufreq_stats_table, cpu))
                 return -EBUSY;
         if ((stat = kzalloc(sizeof(struct cpufreq_stats), GFP_KERNEL)) == NULL)
                 return -ENOMEM;
@@ -207,7 +207,7 @@ cpufreq_stats_create_table (struct cpufreq_policy *policy,
                 goto error_out;
 
         stat->cpu = cpu;
-        cpufreq_stats_table[cpu] = stat;
+        per_cpu(cpufreq_stats_table, cpu) = stat;
 
         for (i=0; table[i].frequency != CPUFREQ_TABLE_END; i++) {
                 unsigned int freq = table[i].frequency;
@@ -251,7 +251,7 @@ error_out:
         cpufreq_cpu_put(data);
 error_get_fail:
         kfree(stat);
-        cpufreq_stats_table[cpu] = NULL;
+        per_cpu(cpufreq_stats_table, cpu) = NULL;
         return ret;
 }
 
@@ -284,7 +284,7 @@ cpufreq_stat_notifier_trans (struct notifier_block *nb, unsigned long val,
         if (val != CPUFREQ_POSTCHANGE)
                 return 0;
 
-        stat = cpufreq_stats_table[freq->cpu];
+        stat = per_cpu(cpufreq_stats_table, freq->cpu);
         if (!stat)
                 return 0;
 
diff --git a/drivers/cpufreq/freq_table.c b/drivers/cpufreq/freq_table.c
index ae6cd60d5c14..fe485c9515d1 100644
--- a/drivers/cpufreq/freq_table.c
+++ b/drivers/cpufreq/freq_table.c
@@ -169,7 +169,7 @@ int cpufreq_frequency_table_target(struct cpufreq_policy *policy,
 }
 EXPORT_SYMBOL_GPL(cpufreq_frequency_table_target);
 
-static struct cpufreq_frequency_table *show_table[NR_CPUS];
+static DEFINE_PER_CPU(struct cpufreq_frequency_table *, show_table);
 /**
  * show_available_freqs - show available frequencies for the specified CPU
  */
@@ -180,10 +180,10 @@ static ssize_t show_available_freqs (struct cpufreq_policy *policy, char *buf)
         ssize_t count = 0;
         struct cpufreq_frequency_table *table;
 
-        if (!show_table[cpu])
+        if (!per_cpu(show_table, cpu))
                 return -ENODEV;
 
-        table = show_table[cpu];
+        table = per_cpu(show_table, cpu);
 
         for (i=0; (table[i].frequency != CPUFREQ_TABLE_END); i++) {
                 if (table[i].frequency == CPUFREQ_ENTRY_INVALID)
@@ -212,20 +212,20 @@ void cpufreq_frequency_table_get_attr(struct cpufreq_frequency_table *table,
                                       unsigned int cpu)
 {
         dprintk("setting show_table for cpu %u to %p\n", cpu, table);
-        show_table[cpu] = table;
+        per_cpu(show_table, cpu) = table;
 }
 EXPORT_SYMBOL_GPL(cpufreq_frequency_table_get_attr);
 
 void cpufreq_frequency_table_put_attr(unsigned int cpu)
 {
         dprintk("clearing show_table for cpu %u\n", cpu);
-        show_table[cpu] = NULL;
+        per_cpu(show_table, cpu) = NULL;
 }
 EXPORT_SYMBOL_GPL(cpufreq_frequency_table_put_attr);
 
 struct cpufreq_frequency_table *cpufreq_frequency_get_table(unsigned int cpu)
 {
-        return show_table[cpu];
+        return per_cpu(show_table, cpu);
 }
 EXPORT_SYMBOL_GPL(cpufreq_frequency_get_table);