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| author | Viresh Kumar <viresh.kumar@linaro.org> | 2013-07-02 16:36:28 +0530 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-07-04 13:12:44 +0200 |
| commit | 266c13d767be61a17d8e6f2310b9b7c46278273b (patch) | |
| tree | 924a27434d5846f69b541012494d6ea1f2cb10cf /include/linux/cpufreq.h | |
| parent | f991fae5c6d42dfc5029150b05a78cf3f6c18cc9 (diff) | |
| download | lwn-266c13d767be61a17d8e6f2310b9b7c46278273b.tar.gz lwn-266c13d767be61a17d8e6f2310b9b7c46278273b.zip | |
cpufreq: Fix serialization of frequency transitions
Commit 7c30ed ("cpufreq: make sure frequency transitions are serialized")
interacts poorly with systems that have a single core freqency for all
cores. On such systems we have a single policy for all cores with
several CPUs. When we do a frequency transition the governor calls the
pre and post change notifiers which causes cpufreq_notify_transition()
per CPU. Since the policy is the same for all of them all CPUs after
the first and the warnings added are generated by checking a per-policy
flag the warnings will be triggered for all cores after the first.
Fix this by allowing notifier to be called for n times. Where n is the number of
cpus in policy->cpus.
Reported-and-tested-by: Mark Brown <broonie@linaro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'include/linux/cpufreq.h')
| -rw-r--r-- | include/linux/cpufreq.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h index 4d7390bc1727..90d5a15120d5 100644 --- a/include/linux/cpufreq.h +++ b/include/linux/cpufreq.h @@ -119,7 +119,7 @@ struct cpufreq_policy { struct kobject kobj; struct completion kobj_unregister; - bool transition_ongoing; /* Tracks transition status */ + int transition_ongoing; /* Tracks transition status */ }; #define CPUFREQ_ADJUST (0) |