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| author | Viresh Kumar <viresh.kumar@linaro.org> | 2015-01-06 16:39:15 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2015-01-23 23:06:45 +0100 |
| commit | 490285c65e2398a533035dd9d75cb606a61ea39a (patch) | |
| tree | e18fa0f20423f9838e3bafe5e7f036fc4b75ae33 /drivers/cpufreq/cpufreq_governor.h | |
| parent | cpufreq: stats: don't update stats on false notifiers (diff) | |
| download | linux-490285c65e2398a533035dd9d75cb606a61ea39a.tar.xz linux-490285c65e2398a533035dd9d75cb606a61ea39a.zip | |
cpufreq: stats: drop unnecessary locking
There is no possibility of any race on updating last_index, trans_table or
total_trans as these are updated only by cpufreq_stat_notifier_trans() which
will be called sequentially.
The only place where locking is still relevant is: cpufreq_stats_update(), which
updates time_in_state and last_time. This can be called by two thread in
parallel, that may result in races.
The two threads being:
- sysfs read of time_in_state
- and frequency transition that calls cpufreq_stat_notifier_trans().
Remove locking from the first case mentioned above.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/cpufreq/cpufreq_governor.h')
0 files changed, 0 insertions, 0 deletions