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Subject[PATCH V3 3/5] cpufreq: stats: Mark few conditionals with unlikely()
Date
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 --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);
--
2.25.0.rc1.19.g042ed3e048af
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