cpufreq: Notify all policy->cpus in cpufreq_notify_transition()

policy->cpus contains all online cpus that have single shared clock line. And
their frequencies are always updated together.

Many SMP system's cpufreq drivers take care of this in individual drivers but
the best place for this code is in cpufreq core.

This patch modifies cpufreq_notify_transition() to notify frequency change for
all cpus in policy->cpus and hence updates all users of this API.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Stephen Warren <swarren@nvidia.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

1 files changed, 7 insertions, 6 deletions

diff --git a/arch/sparc/kernel/us2e_cpufreq.c b/arch/sparc/kernel/us2e_cpufreq.c
index 489fc15f3194..abe963d7b87c 100644
--- a/arch/sparc/kernel/us2e_cpufreq.c
+++ b/arch/sparc/kernel/us2e_cpufreq.c
@@ -248,8 +248,10 @@ static unsigned int us2e_freq_get(unsigned int cpu)
         return clock_tick / estar_to_divisor(estar);
 }
 
-static void us2e_set_cpu_divider_index(unsigned int cpu, unsigned int index)
+static void us2e_set_cpu_divider_index(struct cpufreq_policy *policy,
+                unsigned int index)
 {
+        unsigned int cpu = policy->cpu;
         unsigned long new_bits, new_freq;
         unsigned long clock_tick, divisor, old_divisor, estar;
         cpumask_t cpus_allowed;
@@ -272,14 +274,13 @@ static void us2e_set_cpu_divider_index(unsigned int cpu, unsigned int index)
 
         freqs.old = clock_tick / old_divisor;
         freqs.new = new_freq;
-        freqs.cpu = cpu;
-        cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);
+        cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE);
 
         if (old_divisor != divisor)
                 us2e_transition(estar, new_bits, clock_tick * 1000,
                                 old_divisor, divisor);
 
-        cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);
+        cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
 
         set_cpus_allowed_ptr(current, &cpus_allowed);
 }
@@ -295,7 +296,7 @@ static int us2e_freq_target(struct cpufreq_policy *policy,
                                            target_freq, relation, &new_index))
                 return -EINVAL;
 
-        us2e_set_cpu_divider_index(policy->cpu, new_index);
+        us2e_set_cpu_divider_index(policy, new_index);
 
         return 0;
 }
@@ -335,7 +336,7 @@ static int __init us2e_freq_cpu_init(struct cpufreq_policy *policy)
 static int us2e_freq_cpu_exit(struct cpufreq_policy *policy)
 {
         if (cpufreq_us2e_driver)
-                us2e_set_cpu_divider_index(policy->cpu, 0);
+                us2e_set_cpu_divider_index(policy, 0);
 
         return 0;
 }