diff mbox series

[V3,3/5] cpufreq: stats: Mark few conditionals with unlikely()

Message ID bcd08a46937c3c4f36853e8be1b11aef5a290248.1601884370.git.viresh.kumar@linaro.org
State New
Headers show
Series cpufreq: Record stats with fast-switching | expand

Commit Message

Viresh Kumar Oct. 5, 2020, 7:56 a.m. UTC 
Since this will be part of scheduler's hotpath in some cases, use
unlikely() for few of the obvious conditionals.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
---
 drivers/cpufreq/cpufreq_stats.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/drivers/cpufreq/cpufreq_stats.c b/drivers/cpufreq/cpufreq_stats.c
index 45a067855367..bba04da3a278 100644
--- a/drivers/cpufreq/cpufreq_stats.c
+++ b/drivers/cpufreq/cpufreq_stats.c
@@ -260,7 +260,7 @@  void cpufreq_stats_record_transition(struct cpufreq_policy *policy,
 	struct cpufreq_stats *stats = policy->stats;
 	int old_index, new_index;
 
-	if (!stats)
+	if (unlikely(!stats))
 		return;
 
 	if (unlikely(READ_ONCE(stats->reset_pending)))
@@ -270,7 +270,7 @@  void cpufreq_stats_record_transition(struct cpufreq_policy *policy,
 	new_index = freq_table_get_index(stats, new_freq);
 
 	/* We can't do stats->time_in_state[-1]= .. */
-	if (old_index == -1 || new_index == -1 || old_index == new_index)
+	if (unlikely(old_index == -1 || new_index == -1 || old_index == new_index))
 		return;
 
 	cpufreq_stats_update(stats, stats->last_time);