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authorViresh Kumar <viresh.kumar@linaro.org>2013-07-02 15:06:28 +0400
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2013-07-04 15:12:44 +0400
commit266c13d767be61a17d8e6f2310b9b7c46278273b (patch)
tree924a27434d5846f69b541012494d6ea1f2cb10cf /include/linux/cpufreq.h
parentf991fae5c6d42dfc5029150b05a78cf3f6c18cc9 (diff)
downloadlinux-266c13d767be61a17d8e6f2310b9b7c46278273b.tar.xz
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.h2
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)