diff mbox series

[V3,2/5] cpufreq: stats: Remove locking

Message ID d2dadb9656aa49a8ba1a5ddaf9ccab6c32383539.1601884370.git.viresh.kumar@linaro.org
State Accepted
Commit 381abb942a392377f614b62c87692f4f2e8aa59b
Headers show
Series cpufreq: Record stats with fast-switching | expand

Commit Message

Viresh Kumar Oct. 5, 2020, 7:56 a.m. UTC 
The locking isn't required anymore as stats can get updated only from
one place at a time. Remove it.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
---
 drivers/cpufreq/cpufreq_stats.c | 6 ------
 1 file changed, 6 deletions(-)
diff mbox series

Patch

diff --git a/drivers/cpufreq/cpufreq_stats.c b/drivers/cpufreq/cpufreq_stats.c
index 498d962ba224..45a067855367 100644
--- a/drivers/cpufreq/cpufreq_stats.c
+++ b/drivers/cpufreq/cpufreq_stats.c
@@ -19,7 +19,6 @@  struct cpufreq_stats {
 	unsigned int state_num;
 	unsigned int last_index;
 	u64 *time_in_state;
-	spinlock_t lock;
 	unsigned int *freq_table;
 	unsigned int *trans_table;
 
@@ -41,7 +40,6 @@  static void cpufreq_stats_reset_table(struct cpufreq_stats *stats)
 {
 	unsigned int count = stats->max_state;
 
-	spin_lock(&stats->lock);
 	memset(stats->time_in_state, 0, count * sizeof(u64));
 	memset(stats->trans_table, 0, count * count * sizeof(int));
 	stats->last_time = get_jiffies_64();
@@ -50,7 +48,6 @@  static void cpufreq_stats_reset_table(struct cpufreq_stats *stats)
 	/* Adjust for the time elapsed since reset was requested */
 	WRITE_ONCE(stats->reset_pending, 0);
 	cpufreq_stats_update(stats, READ_ONCE(stats->reset_time));
-	spin_unlock(&stats->lock);
 }
 
 static ssize_t show_total_trans(struct cpufreq_policy *policy, char *buf)
@@ -244,7 +241,6 @@  void cpufreq_stats_create_table(struct cpufreq_policy *policy)
 	stats->state_num = i;
 	stats->last_time = get_jiffies_64();
 	stats->last_index = freq_table_get_index(stats, policy->cur);
-	spin_lock_init(&stats->lock);
 
 	policy->stats = stats;
 	ret = sysfs_create_group(&policy->kobj, &stats_attr_group);
@@ -277,11 +273,9 @@  void cpufreq_stats_record_transition(struct cpufreq_policy *policy,
 	if (old_index == -1 || new_index == -1 || old_index == new_index)
 		return;
 
-	spin_lock(&stats->lock);
 	cpufreq_stats_update(stats, stats->last_time);
 
 	stats->last_index = new_index;
 	stats->trans_table[old_index * stats->max_state + new_index]++;
 	stats->total_trans++;
-	spin_unlock(&stats->lock);
 }