[RFC PATCH 11/19] cpufreq: assert policy->rwsem is held in __cpufreq_governor

[Juri Lelli]

__cpufreq_governor works on policy, so policy->rwsem has to be held.
Add assertion for such condition.

Cc: "Rafael J. Wysocki" <rjw@xxxxxxxxxxxxx>
Cc: Viresh Kumar <viresh.kumar@xxxxxxxxxx>
Signed-off-by: Juri Lelli <juri.lelli@xxxxxxx>
---
 drivers/cpufreq/cpufreq.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index f1f9fbc..e7fc5c9 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -1950,6 +1950,9 @@ static int __cpufreq_governor(struct cpufreq_policy *policy,
 	/* Don't start any governor operations if we are entering suspend */
 	if (cpufreq_suspended)
 		return 0;
+
+	lockdep_assert_held(&policy->rwsem);
+
 	/*
 	 * Governor might not be initiated here if ACPI _PPC changed
 	 * notification happened, so check it.
-- 
2.2.2