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authorViresh Kumar <[email protected]>2016-02-11 17:31:13 +0530
committerRafael J. Wysocki <[email protected]>2016-03-09 14:41:01 +0100
commit99522fe6788f5bf627dce7c20ed9484c933511a3 (patch)
tree55353e0c03780e911cf855135f32f02565fd9603 /tools/perf/scripts/python/call-graph-from-postgresql.py
parent49f18560f8bac5315047edfb673dd13d56cbcbc9 (diff)
cpufreq: Remove cpufreq_governor_lock
We used to drop policy->rwsem just before calling __cpufreq_governor() in some cases earlier and so it was possible that __cpufreq_governor() ran concurrently via separate threads for the same policy. In order to guarantee valid state transitions for governors, 'governor_enabled' was required to be protected using some locking and cpufreq_governor_lock was added for that. But now __cpufreq_governor() is always called under policy->rwsem, and 'governor_enabled' is protected against races even without cpufreq_governor_lock. Get rid of the extra lock now. Signed-off-by: Viresh Kumar <[email protected]> Tested-by: Juri Lelli <[email protected]> Tested-by: Shilpasri G Bhat <[email protected]> [ rjw : Changelog ] Signed-off-by: Rafael J. Wysocki <[email protected]>
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