acpi-wmi: Unmark as 'experimental'

[safe/jmp/linux-2.6] / drivers / cpufreq / cpufreq_stats.c

diff --git a/drivers/cpufreq/cpufreq_stats.c b/drivers/cpufreq/cpufreq_stats.c
index d2f0cbd..c0ff97d 100644 (file)
--- a/drivers/cpufreq/cpufreq_stats.c
+++ b/drivers/cpufreq/cpufreq_stats.c
@@ -25,8 +25,7 @@ static spinlock_t cpufreq_stats_lock;
 
 #define CPUFREQ_STATDEVICE_ATTR(_name,_mode,_show) \
 static struct freq_attr _attr_##_name = {\
-       .attr = {.name = __stringify(_name), .owner = THIS_MODULE, \
-               .mode = _mode, }, \
+       .attr = {.name = __stringify(_name), .mode = _mode, }, \
        .show = _show,\
 };
 
@@ -44,7 +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;
@@ -59,7 +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],
@@ -72,11 +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
@@ -84,7 +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);
@@ -102,7 +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);
@@ -115,7 +114,7 @@ show_trans_table(struct cpufreq_policy *policy, char *buf)
                                stat->freq_table[i]);
        }
        if (len >= PAGE_SIZE)
-               return len;
+               return PAGE_SIZE;
 
        len += snprintf(buf + len, PAGE_SIZE - len, "\n");
 
@@ -132,8 +131,12 @@ show_trans_table(struct cpufreq_policy *policy, char *buf)
                        len += snprintf(buf + len, PAGE_SIZE - len, "%9u ",
                                        stat->trans_table[i*stat->max_state+j]);
                }
+               if (len >= PAGE_SIZE)
+                       break;
                len += snprintf(buf + len, PAGE_SIZE - len, "\n");
        }
+       if (len >= PAGE_SIZE)
+               return PAGE_SIZE;
        return len;
 }
 CPUFREQ_STATDEVICE_ATTR(trans_table,0444,show_trans_table);
@@ -165,10 +168,9 @@ freq_table_get_index(struct cpufreq_stats *stat, unsigned int freq)
        return -1;
 }
 
-static void
-cpufreq_stats_free_table (unsigned int cpu)
+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);
@@ -176,7 +178,7 @@ 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);
 }
@@ -190,7 +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;
@@ -205,7 +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;
@@ -249,7 +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;
 }
 
@@ -282,11 +284,11 @@ 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;
 
-       old_index = freq_table_get_index(stat, freq->old);
+       old_index = stat->last_index;
        new_index = freq_table_get_index(stat, freq->new);
 
        cpufreq_stats_update(freq->cpu);
@@ -306,8 +308,9 @@ cpufreq_stat_notifier_trans (struct notifier_block *nb, unsigned long val,
        return 0;
 }
 
-static int cpufreq_stat_cpu_callback(struct notifier_block *nfb,
-                                       unsigned long action, void *hcpu)
+static int __cpuinit cpufreq_stat_cpu_callback(struct notifier_block *nfb,
+                                              unsigned long action,
+                                              void *hcpu)
 {
        unsigned int cpu = (unsigned long)hcpu;
 
@@ -324,7 +327,7 @@ static int cpufreq_stat_cpu_callback(struct notifier_block *nfb,
        return NOTIFY_OK;
 }
 
-static struct notifier_block cpufreq_stat_cpu_notifier =
+static struct notifier_block cpufreq_stat_cpu_notifier __refdata =
 {
        .notifier_call = cpufreq_stat_cpu_callback,
 };
@@ -357,8 +360,7 @@ __init cpufreq_stats_init(void)
 
        register_hotcpu_notifier(&cpufreq_stat_cpu_notifier);
        for_each_online_cpu(cpu) {
-               cpufreq_stat_cpu_callback(&cpufreq_stat_cpu_notifier,
-                               CPU_ONLINE, (void *)(long)cpu);
+               cpufreq_update_policy(cpu);
        }
        return 0;
 }
@@ -373,13 +375,12 @@ __exit cpufreq_stats_exit(void)
                        CPUFREQ_TRANSITION_NOTIFIER);
        unregister_hotcpu_notifier(&cpufreq_stat_cpu_notifier);
        for_each_online_cpu(cpu) {
-               cpufreq_stat_cpu_callback(&cpufreq_stat_cpu_notifier,
-                                               CPU_DEAD, (void *)(long)cpu);
+               cpufreq_stats_free_table(cpu);
        }
 }
 
 MODULE_AUTHOR ("Zou Nan hai <nanhai.zou@intel.com>");
-MODULE_DESCRIPTION ("'cpufreq_stats' - A driver to export cpufreq stats"
+MODULE_DESCRIPTION ("'cpufreq_stats' - A driver to export cpufreq stats "
                                "through sysfs filesystem");
 MODULE_LICENSE ("GPL");