| /* |
| * drivers/cpufreq/cpufreq_stats.c |
| * |
| * Copyright (C) 2003-2004 Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>. |
| * (C) 2004 Zou Nan hai <nanhai.zou@intel.com>. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/slab.h> |
| #include <linux/cpu.h> |
| #include <linux/sysfs.h> |
| #include <linux/cpufreq.h> |
| #include <linux/module.h> |
| #include <linux/jiffies.h> |
| #include <linux/percpu.h> |
| #include <linux/kobject.h> |
| #include <linux/spinlock.h> |
| #include <linux/notifier.h> |
| #include <linux/sort.h> |
| #include <linux/err.h> |
| #include <asm/cputime.h> |
| |
| static spinlock_t cpufreq_stats_lock; |
| |
| struct cpufreq_stats { |
| unsigned int cpu; |
| unsigned int total_trans; |
| unsigned long long last_time; |
| unsigned int max_state; |
| unsigned int state_num; |
| unsigned int last_index; |
| u64 *time_in_state; |
| unsigned int *freq_table; |
| #ifdef CONFIG_CPU_FREQ_STAT_DETAILS |
| unsigned int *trans_table; |
| #endif |
| }; |
| |
| struct all_cpufreq_stats { |
| unsigned int state_num; |
| cputime64_t *time_in_state; |
| unsigned int *freq_table; |
| }; |
| |
| struct all_freq_table { |
| unsigned int *freq_table; |
| unsigned int table_size; |
| }; |
| |
| static struct all_freq_table *all_freq_table; |
| |
| static DEFINE_PER_CPU(struct all_cpufreq_stats *, all_cpufreq_stats); |
| static DEFINE_PER_CPU(struct cpufreq_stats *, cpufreq_stats_table); |
| |
| struct cpufreq_stats_attribute { |
| struct attribute attr; |
| ssize_t(*show) (struct cpufreq_stats *, char *); |
| }; |
| |
| static int cpufreq_stats_update(unsigned int cpu) |
| { |
| struct cpufreq_stats *stat; |
| struct all_cpufreq_stats *all_stat; |
| unsigned long long cur_time; |
| |
| cur_time = get_jiffies_64(); |
| spin_lock(&cpufreq_stats_lock); |
| stat = per_cpu(cpufreq_stats_table, cpu); |
| all_stat = per_cpu(all_cpufreq_stats, cpu); |
| if (!stat) { |
| spin_unlock(&cpufreq_stats_lock); |
| return 0; |
| } |
| if (stat->time_in_state) { |
| stat->time_in_state[stat->last_index] += |
| cur_time - stat->last_time; |
| if (all_stat) |
| all_stat->time_in_state[stat->last_index] += |
| cur_time - stat->last_time; |
| } |
| stat->last_time = cur_time; |
| spin_unlock(&cpufreq_stats_lock); |
| return 0; |
| } |
| |
| static ssize_t show_total_trans(struct cpufreq_policy *policy, char *buf) |
| { |
| struct cpufreq_stats *stat = per_cpu(cpufreq_stats_table, policy->cpu); |
| if (!stat) |
| return 0; |
| return sprintf(buf, "%d\n", |
| per_cpu(cpufreq_stats_table, stat->cpu)->total_trans); |
| } |
| |
| static ssize_t show_time_in_state(struct cpufreq_policy *policy, char *buf) |
| { |
| ssize_t len = 0; |
| int i; |
| struct cpufreq_stats *stat = per_cpu(cpufreq_stats_table, policy->cpu); |
| if (!stat) |
| return 0; |
| cpufreq_stats_update(stat->cpu); |
| for (i = 0; i < stat->state_num; i++) { |
| len += sprintf(buf + len, "%u %llu\n", stat->freq_table[i], |
| (unsigned long long) |
| cputime64_to_clock_t(stat->time_in_state[i])); |
| } |
| return len; |
| } |
| |
| static int get_index_all_cpufreq_stat(struct all_cpufreq_stats *all_stat, |
| unsigned int freq) |
| { |
| int i; |
| if (!all_stat) |
| return -1; |
| for (i = 0; i < all_stat->state_num; i++) { |
| if (all_stat->freq_table[i] == freq) |
| return i; |
| } |
| return -1; |
| } |
| |
| static ssize_t show_all_time_in_state(struct kobject *kobj, |
| struct kobj_attribute *attr, char *buf) |
| { |
| ssize_t len = 0; |
| unsigned int i, cpu, freq, index; |
| struct all_cpufreq_stats *all_stat; |
| struct cpufreq_policy *policy; |
| |
| len += scnprintf(buf + len, PAGE_SIZE - len, "freq\t\t"); |
| for_each_possible_cpu(cpu) { |
| len += scnprintf(buf + len, PAGE_SIZE - len, "cpu%d\t\t", cpu); |
| if (cpu_online(cpu)) |
| cpufreq_stats_update(cpu); |
| } |
| |
| if (!all_freq_table) |
| goto out; |
| for (i = 0; i < all_freq_table->table_size; i++) { |
| freq = all_freq_table->freq_table[i]; |
| len += scnprintf(buf + len, PAGE_SIZE - len, "\n%u\t\t", freq); |
| for_each_possible_cpu(cpu) { |
| policy = cpufreq_cpu_get(cpu); |
| if (policy == NULL) |
| continue; |
| all_stat = per_cpu(all_cpufreq_stats, policy->cpu); |
| index = get_index_all_cpufreq_stat(all_stat, freq); |
| if (index != -1) { |
| len += scnprintf(buf + len, PAGE_SIZE - len, |
| "%llu\t\t", (unsigned long long) |
| cputime64_to_clock_t(all_stat->time_in_state[index])); |
| } else { |
| len += scnprintf(buf + len, PAGE_SIZE - len, |
| "N/A\t\t"); |
| } |
| cpufreq_cpu_put(policy); |
| } |
| } |
| |
| out: |
| len += scnprintf(buf + len, PAGE_SIZE - len, "\n"); |
| return len; |
| } |
| |
| #ifdef CONFIG_CPU_FREQ_STAT_DETAILS |
| static ssize_t show_trans_table(struct cpufreq_policy *policy, char *buf) |
| { |
| ssize_t len = 0; |
| int i, j; |
| |
| struct cpufreq_stats *stat = per_cpu(cpufreq_stats_table, policy->cpu); |
| if (!stat) |
| return 0; |
| cpufreq_stats_update(stat->cpu); |
| len += snprintf(buf + len, PAGE_SIZE - len, " From : To\n"); |
| len += snprintf(buf + len, PAGE_SIZE - len, " : "); |
| for (i = 0; i < stat->state_num; i++) { |
| if (len >= PAGE_SIZE) |
| break; |
| len += snprintf(buf + len, PAGE_SIZE - len, "%9u ", |
| stat->freq_table[i]); |
| } |
| if (len >= PAGE_SIZE) |
| return PAGE_SIZE; |
| |
| len += snprintf(buf + len, PAGE_SIZE - len, "\n"); |
| |
| for (i = 0; i < stat->state_num; i++) { |
| if (len >= PAGE_SIZE) |
| break; |
| |
| len += snprintf(buf + len, PAGE_SIZE - len, "%9u: ", |
| stat->freq_table[i]); |
| |
| for (j = 0; j < stat->state_num; j++) { |
| if (len >= PAGE_SIZE) |
| break; |
| 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_freq_attr_ro(trans_table); |
| #endif |
| |
| cpufreq_freq_attr_ro(total_trans); |
| cpufreq_freq_attr_ro(time_in_state); |
| |
| static struct attribute *default_attrs[] = { |
| &total_trans.attr, |
| &time_in_state.attr, |
| #ifdef CONFIG_CPU_FREQ_STAT_DETAILS |
| &trans_table.attr, |
| #endif |
| NULL |
| }; |
| static struct attribute_group stats_attr_group = { |
| .attrs = default_attrs, |
| .name = "stats" |
| }; |
| |
| static struct kobj_attribute _attr_all_time_in_state = __ATTR(all_time_in_state, |
| 0444, show_all_time_in_state, NULL); |
| |
| static int freq_table_get_index(struct cpufreq_stats *stat, unsigned int freq) |
| { |
| int index; |
| for (index = 0; index < stat->state_num; index++) |
| if (stat->freq_table[index] > freq) |
| break; |
| return index - 1; /* below lowest freq in table: return -1 */ |
| } |
| |
| /* should be called late in the CPU removal sequence so that the stats |
| * memory is still available in case someone tries to use it. |
| */ |
| static void cpufreq_stats_free_table(unsigned int cpu) |
| { |
| struct cpufreq_stats *stat; |
| |
| spin_lock(&cpufreq_stats_lock); |
| stat = per_cpu(cpufreq_stats_table, cpu); |
| per_cpu(cpufreq_stats_table, cpu) = NULL; |
| spin_unlock(&cpufreq_stats_lock); |
| |
| if (stat) { |
| pr_debug("%s: Free stat table\n", __func__); |
| kfree(stat->time_in_state); |
| kfree(stat); |
| per_cpu(cpufreq_stats_table, cpu) = NULL; |
| } |
| } |
| |
| /* must be called early in the CPU removal sequence (before |
| * cpufreq_remove_dev) so that policy is still valid. |
| */ |
| static void cpufreq_stats_free_sysfs(unsigned int cpu) |
| { |
| struct cpufreq_policy *policy = cpufreq_cpu_get(cpu); |
| |
| if (!policy) |
| return; |
| |
| if (!cpufreq_frequency_get_table(cpu)) |
| goto put_ref; |
| |
| if (!policy_is_shared(policy)) { |
| pr_debug("%s: Free sysfs stat\n", __func__); |
| sysfs_remove_group(&policy->kobj, &stats_attr_group); |
| } |
| |
| put_ref: |
| cpufreq_cpu_put(policy); |
| } |
| |
| static void cpufreq_allstats_free(void) |
| { |
| int cpu; |
| struct all_cpufreq_stats *all_stat; |
| |
| sysfs_remove_file(cpufreq_global_kobject, |
| &_attr_all_time_in_state.attr); |
| |
| for_each_possible_cpu(cpu) { |
| all_stat = per_cpu(all_cpufreq_stats, cpu); |
| if (!all_stat) |
| continue; |
| kfree(all_stat->time_in_state); |
| kfree(all_stat); |
| per_cpu(all_cpufreq_stats, cpu) = NULL; |
| } |
| if (all_freq_table) { |
| kfree(all_freq_table->freq_table); |
| kfree(all_freq_table); |
| all_freq_table = NULL; |
| } |
| } |
| |
| static int cpufreq_stats_create_table(struct cpufreq_policy *policy, |
| struct cpufreq_frequency_table *table) |
| { |
| unsigned int i, j, k, l, count = 0, ret = 0; |
| struct cpufreq_stats *stat; |
| struct cpufreq_policy *data; |
| unsigned int alloc_size; |
| unsigned int cpu = policy->cpu; |
| if (per_cpu(cpufreq_stats_table, cpu)) |
| return -EBUSY; |
| stat = kzalloc(sizeof(struct cpufreq_stats), GFP_KERNEL); |
| if ((stat) == NULL) |
| return -ENOMEM; |
| |
| data = cpufreq_cpu_get(cpu); |
| if (data == NULL) { |
| ret = -EINVAL; |
| goto error_get_fail; |
| } |
| |
| ret = sysfs_create_group(&data->kobj, &stats_attr_group); |
| if (ret) |
| goto error_out; |
| |
| stat->cpu = cpu; |
| per_cpu(cpufreq_stats_table, cpu) = stat; |
| |
| for (i = 0; table[i].frequency != CPUFREQ_TABLE_END; i++) { |
| unsigned int freq = table[i].frequency; |
| if (freq == CPUFREQ_ENTRY_INVALID) |
| continue; |
| count++; |
| } |
| |
| alloc_size = count * sizeof(int) + count * sizeof(u64); |
| |
| #ifdef CONFIG_CPU_FREQ_STAT_DETAILS |
| alloc_size += count * count * sizeof(int); |
| #endif |
| stat->max_state = count; |
| stat->time_in_state = kzalloc(alloc_size, GFP_KERNEL); |
| if (!stat->time_in_state) { |
| ret = -ENOMEM; |
| goto error_out; |
| } |
| stat->freq_table = (unsigned int *)(stat->time_in_state + count); |
| |
| #ifdef CONFIG_CPU_FREQ_STAT_DETAILS |
| stat->trans_table = stat->freq_table + count; |
| #endif |
| j = 0; |
| for (i = 0; table[i].frequency != CPUFREQ_TABLE_END; i++) { |
| unsigned int freq = table[i].frequency; |
| if (freq == CPUFREQ_ENTRY_INVALID) |
| continue; |
| |
| /* Insert in sorted stat->freq_table */ |
| for (k = 0; k < j && stat->freq_table[k] < freq; k++) |
| ; |
| if (stat->freq_table[k] == freq) |
| continue; |
| for (l = j; l > k; l--) |
| stat->freq_table[l] = stat->freq_table[l - 1]; |
| stat->freq_table[k] = freq; |
| j++; |
| } |
| stat->state_num = j; |
| spin_lock(&cpufreq_stats_lock); |
| stat->last_time = get_jiffies_64(); |
| stat->last_index = freq_table_get_index(stat, policy->cur); |
| spin_unlock(&cpufreq_stats_lock); |
| cpufreq_cpu_put(data); |
| return 0; |
| error_out: |
| cpufreq_cpu_put(data); |
| error_get_fail: |
| kfree(stat); |
| per_cpu(cpufreq_stats_table, cpu) = NULL; |
| return ret; |
| } |
| |
| static void cpufreq_stats_update_policy_cpu(struct cpufreq_policy *policy) |
| { |
| struct cpufreq_stats *stat = per_cpu(cpufreq_stats_table, |
| policy->last_cpu); |
| |
| pr_debug("Updating stats_table for new_cpu %u from last_cpu %u\n", |
| policy->cpu, policy->last_cpu); |
| per_cpu(cpufreq_stats_table, policy->cpu) = per_cpu(cpufreq_stats_table, |
| policy->last_cpu); |
| per_cpu(cpufreq_stats_table, policy->last_cpu) = NULL; |
| stat->cpu = policy->cpu; |
| } |
| |
| static int compare_for_sort(const void *lhs_ptr, const void *rhs_ptr) |
| { |
| unsigned int lhs = *(const unsigned int *)(lhs_ptr); |
| unsigned int rhs = *(const unsigned int *)(rhs_ptr); |
| if (lhs < rhs) |
| return -1; |
| if (lhs > rhs) |
| return 1; |
| return 0; |
| } |
| |
| static bool check_all_freq_table(unsigned int freq) |
| { |
| int i; |
| for (i = 0; i < all_freq_table->table_size; i++) { |
| if (freq == all_freq_table->freq_table[i]) |
| return true; |
| } |
| return false; |
| } |
| |
| static void create_all_freq_table(void) |
| { |
| all_freq_table = kzalloc(sizeof(struct all_freq_table), |
| GFP_KERNEL); |
| if (!all_freq_table) |
| pr_warn("could not allocate memory for all_freq_table\n"); |
| return; |
| } |
| |
| static void add_all_freq_table(unsigned int freq) |
| { |
| unsigned int size; |
| size = sizeof(unsigned int) * (all_freq_table->table_size + 1); |
| all_freq_table->freq_table = krealloc(all_freq_table->freq_table, |
| size, GFP_ATOMIC); |
| if (IS_ERR(all_freq_table->freq_table)) { |
| pr_warn("Could not reallocate memory for freq_table\n"); |
| all_freq_table->freq_table = NULL; |
| return; |
| } |
| all_freq_table->freq_table[all_freq_table->table_size++] = freq; |
| } |
| |
| static void cpufreq_allstats_create(unsigned int cpu) |
| { |
| int i , j = 0; |
| unsigned int alloc_size, count = 0; |
| struct cpufreq_frequency_table *table = cpufreq_frequency_get_table(cpu); |
| struct all_cpufreq_stats *all_stat; |
| bool sort_needed = false; |
| |
| if (!table) |
| return; |
| |
| for (i = 0; table[i].frequency != CPUFREQ_TABLE_END; i++) { |
| unsigned int freq = table[i].frequency; |
| if (freq == CPUFREQ_ENTRY_INVALID) |
| continue; |
| count++; |
| } |
| |
| all_stat = kzalloc(sizeof(struct all_cpufreq_stats), |
| GFP_KERNEL); |
| if (!all_stat) { |
| pr_warn("Cannot allocate memory for cpufreq stats\n"); |
| return; |
| } |
| |
| /*Allocate memory for freq table per cpu as well as clockticks per freq*/ |
| alloc_size = count * sizeof(int) + count * sizeof(cputime64_t); |
| all_stat->time_in_state = kzalloc(alloc_size, GFP_KERNEL); |
| if (!all_stat->time_in_state) { |
| pr_warn("Cannot allocate memory for cpufreq time_in_state\n"); |
| kfree(all_stat); |
| all_stat = NULL; |
| return; |
| } |
| all_stat->freq_table = (unsigned int *) |
| (all_stat->time_in_state + count); |
| |
| spin_lock(&cpufreq_stats_lock); |
| for (i = 0; table[i].frequency != CPUFREQ_TABLE_END; i++) { |
| unsigned int freq = table[i].frequency; |
| if (freq == CPUFREQ_ENTRY_INVALID) |
| continue; |
| all_stat->freq_table[j++] = freq; |
| if (all_freq_table && !check_all_freq_table(freq)) { |
| add_all_freq_table(freq); |
| sort_needed = true; |
| } |
| } |
| if (sort_needed) |
| sort(all_freq_table->freq_table, all_freq_table->table_size, |
| sizeof(unsigned int), &compare_for_sort, NULL); |
| all_stat->state_num = j; |
| per_cpu(all_cpufreq_stats, cpu) = all_stat; |
| spin_unlock(&cpufreq_stats_lock); |
| } |
| |
| static int cpufreq_stat_notifier_policy(struct notifier_block *nb, |
| unsigned long val, void *data) |
| { |
| int ret; |
| struct cpufreq_policy *policy = data; |
| struct cpufreq_frequency_table *table; |
| unsigned int cpu = policy->cpu; |
| |
| if (val == CPUFREQ_UPDATE_POLICY_CPU) { |
| cpufreq_stats_update_policy_cpu(policy); |
| return 0; |
| } |
| |
| if (val != CPUFREQ_NOTIFY) |
| return 0; |
| table = cpufreq_frequency_get_table(cpu); |
| if (!table) |
| return 0; |
| |
| if (!per_cpu(all_cpufreq_stats, cpu)) |
| cpufreq_allstats_create(cpu); |
| |
| ret = cpufreq_stats_create_table(policy, table); |
| if (ret) |
| return ret; |
| return 0; |
| } |
| |
| static int cpufreq_stat_notifier_trans(struct notifier_block *nb, |
| unsigned long val, void *data) |
| { |
| struct cpufreq_freqs *freq = data; |
| struct cpufreq_stats *stat; |
| int old_index, new_index; |
| |
| if (val != CPUFREQ_POSTCHANGE) |
| return 0; |
| |
| cpufreq_stats_update(freq->cpu); |
| |
| spin_lock(&cpufreq_stats_lock); |
| stat = per_cpu(cpufreq_stats_table, freq->cpu); |
| if (!stat) { |
| spin_unlock(&cpufreq_stats_lock); |
| return 0; |
| } |
| |
| old_index = stat->last_index; |
| new_index = freq_table_get_index(stat, freq->new); |
| |
| if (old_index == new_index) { |
| spin_unlock(&cpufreq_stats_lock); |
| return 0; |
| } |
| |
| stat->last_index = new_index; |
| #ifdef CONFIG_CPU_FREQ_STAT_DETAILS |
| if (old_index >= 0 && new_index >= 0) |
| stat->trans_table[old_index * stat->max_state + new_index]++; |
| #endif |
| stat->total_trans++; |
| spin_unlock(&cpufreq_stats_lock); |
| return 0; |
| } |
| |
| static int cpufreq_stats_create_table_cpu(unsigned int cpu) |
| { |
| struct cpufreq_policy *policy; |
| struct cpufreq_frequency_table *table; |
| int ret = -ENODEV; |
| |
| policy = cpufreq_cpu_get(cpu); |
| if (!policy) |
| return -ENODEV; |
| |
| table = cpufreq_frequency_get_table(cpu); |
| if (!table) |
| goto out; |
| |
| if (!per_cpu(all_cpufreq_stats, cpu)) |
| cpufreq_allstats_create(cpu); |
| |
| ret = cpufreq_stats_create_table(policy, table); |
| |
| out: |
| cpufreq_cpu_put(policy); |
| return ret; |
| } |
| |
| static int __cpuinit cpufreq_stat_cpu_callback(struct notifier_block *nfb, |
| unsigned long action, |
| void *hcpu) |
| { |
| unsigned int cpu = (unsigned long)hcpu; |
| |
| switch (action) { |
| case CPU_ONLINE: |
| case CPU_ONLINE_FROZEN: |
| cpufreq_update_policy(cpu); |
| break; |
| case CPU_DOWN_PREPARE: |
| case CPU_DOWN_PREPARE_FROZEN: |
| cpufreq_stats_free_sysfs(cpu); |
| break; |
| case CPU_DEAD: |
| case CPU_DEAD_FROZEN: |
| cpufreq_stats_free_table(cpu); |
| break; |
| case CPU_DOWN_FAILED: |
| case CPU_DOWN_FAILED_FROZEN: |
| cpufreq_stats_create_table_cpu(cpu); |
| break; |
| } |
| return NOTIFY_OK; |
| } |
| |
| /* priority=1 so this will get called before cpufreq_remove_dev */ |
| static struct notifier_block cpufreq_stat_cpu_notifier __refdata = { |
| .notifier_call = cpufreq_stat_cpu_callback, |
| .priority = 1, |
| }; |
| |
| static struct notifier_block notifier_policy_block = { |
| .notifier_call = cpufreq_stat_notifier_policy |
| }; |
| |
| static struct notifier_block notifier_trans_block = { |
| .notifier_call = cpufreq_stat_notifier_trans |
| }; |
| |
| static int __init cpufreq_stats_init(void) |
| { |
| int ret; |
| unsigned int cpu; |
| |
| spin_lock_init(&cpufreq_stats_lock); |
| ret = cpufreq_register_notifier(¬ifier_policy_block, |
| CPUFREQ_POLICY_NOTIFIER); |
| if (ret) |
| return ret; |
| |
| register_hotcpu_notifier(&cpufreq_stat_cpu_notifier); |
| for_each_online_cpu(cpu) |
| cpufreq_update_policy(cpu); |
| |
| ret = cpufreq_register_notifier(¬ifier_trans_block, |
| CPUFREQ_TRANSITION_NOTIFIER); |
| if (ret) { |
| cpufreq_unregister_notifier(¬ifier_policy_block, |
| CPUFREQ_POLICY_NOTIFIER); |
| unregister_hotcpu_notifier(&cpufreq_stat_cpu_notifier); |
| for_each_online_cpu(cpu) |
| cpufreq_stats_free_table(cpu); |
| return ret; |
| } |
| |
| create_all_freq_table(); |
| ret = sysfs_create_file(cpufreq_global_kobject, |
| &_attr_all_time_in_state.attr); |
| if (ret) |
| pr_warn("Error creating sysfs file for cpufreq stats\n"); |
| |
| return 0; |
| } |
| static void __exit cpufreq_stats_exit(void) |
| { |
| unsigned int cpu; |
| |
| cpufreq_unregister_notifier(¬ifier_policy_block, |
| CPUFREQ_POLICY_NOTIFIER); |
| cpufreq_unregister_notifier(¬ifier_trans_block, |
| CPUFREQ_TRANSITION_NOTIFIER); |
| unregister_hotcpu_notifier(&cpufreq_stat_cpu_notifier); |
| for_each_online_cpu(cpu) { |
| cpufreq_stats_free_table(cpu); |
| cpufreq_stats_free_sysfs(cpu); |
| } |
| cpufreq_allstats_free(); |
| } |
| |
| MODULE_AUTHOR("Zou Nan hai <nanhai.zou@intel.com>"); |
| MODULE_DESCRIPTION("'cpufreq_stats' - A driver to export cpufreq stats " |
| "through sysfs filesystem"); |
| MODULE_LICENSE("GPL"); |
| |
| module_init(cpufreq_stats_init); |
| module_exit(cpufreq_stats_exit); |