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, 2 insertions, 9 deletions

diff --git a/drivers/cpufreq/acpi-cpufreq.c b/drivers/cpufreq/acpi-cpufreq.c
index 57a8774f0b4e..11b8b4b54ceb 100644
--- a/drivers/cpufreq/acpi-cpufreq.c
+++ b/drivers/cpufreq/acpi-cpufreq.c
@@ -423,7 +423,6 @@ static int acpi_cpufreq_target(struct cpufreq_policy *policy,
         struct drv_cmd cmd;
         unsigned int next_state = 0; /* Index into freq_table */
         unsigned int next_perf_state = 0; /* Index into perf table */
-        unsigned int i;
         int result = 0;
 
         pr_debug("acpi_cpufreq_target %d (%d)\n", target_freq, policy->cpu);
@@ -486,10 +485,7 @@ static int acpi_cpufreq_target(struct cpufreq_policy *policy,
 
         freqs.old = perf->states[perf->state].core_frequency * 1000;
         freqs.new = data->freq_table[next_state].frequency;
-        for_each_cpu(i, policy->cpus) {
-                freqs.cpu = i;
-                cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);
-        }
+        cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE);
 
         drv_write(&cmd);
 
@@ -502,10 +498,7 @@ static int acpi_cpufreq_target(struct cpufreq_policy *policy,
                 }
         }
 
-        for_each_cpu(i, policy->cpus) {
-                freqs.cpu = i;
-                cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);
-        }
+        cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
         perf->state = next_perf_state;
 
 out: