tree 26eac4f608f20377a8575db5fff40b7e4182e1e4
parent 9225913d386537f84f0eb72f022a8b4b9e684846
author Viresh Kumar <viresh.kumar@linaro.org> 1420558754 +0530
committer Rafael J. Wysocki <rafael.j.wysocki@intel.com> 1422050805 +0100

cpufreq: stats: don't update stats on false notifiers

We need to call cpufreq_stats_update() to update 'time_in_state' for the last
frequency. This is achieved by calling it from cpufreq_stat_notifier_trans(),
which is called after frequency transition.

But if we detect that the cpu's frequency haven't really changed and its a false
POSTCHANGE notification, we don't really need to update time_in_state.

It wouldn't cause any harm in calling cpufreq_stats_update() but we can avoid
calling it here and call it when the frequency really changes. The result will
be the same but more efficient.

Reviewed-by: Prarit Bhargava <prarit@redhat.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>