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cpufreq: Detect spurious invocations of update_policy_cpu()

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The function update_policy_cpu() is expected to be called when the policy->cpu
of a cpufreq policy is to be changed: ie., the new CPU nominated to become the
policy->cpu is different from the old one.

Print a warning if it is invoked with new_cpu == old_cpu, since such an
invocation might hint at a faulty logic in the caller.

Suggested-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Srivatsa S. Bhat 2013-09-12 17:29:09 +05:30 committed by Rafael J. Wysocki
parent 8910836226
commit 99ec899eaf
1 changed files with 1 additions and 1 deletions
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2
drivers/cpufreq/cpufreq.c
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@ -969,7 +969,7 @@ static void cpufreq_policy_free(struct cpufreq_policy *policy)
static void update_policy_cpu(struct cpufreq_policy *policy, unsigned int cpu)
{
if (cpu == policy->cpu)
if (WARN_ON(cpu == policy->cpu))
return;
/*