Revert "cpufreq: Use cpufreq_policy_list for iterating over policies"

Revert commit eb60852 (cpufreq: Use cpufreq_policy_list for iterating
over policies), because it breaks system suspend/resume on multiple
machines.

It either causes resume to block indefinitely or causes the BUG_ON()
in lock_policy_rwsem_##mode() to trigger on sysfs accesses to cpufreq
attributes.

Conflicts:
	drivers/cpufreq/cpufreq.c

1 files changed, 5 insertions, 4 deletions

diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index 37a687467329..c0ef84d601b7 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -969,8 +969,8 @@ static int __cpufreq_add_dev(struct device *dev, struct subsys_interface *sif,
         struct cpufreq_policy *policy;
         unsigned long flags;
 #ifdef CONFIG_HOTPLUG_CPU
-        struct cpufreq_policy *tpolicy;
         struct cpufreq_governor *gov;
+        int sibling;
 #endif
 
         if (cpu_is_offline(cpu))
@@ -993,10 +993,11 @@ static int __cpufreq_add_dev(struct device *dev, struct subsys_interface *sif,
 #ifdef CONFIG_HOTPLUG_CPU
         /* Check if this cpu was hot-unplugged earlier and has siblings */
         read_lock_irqsave(&cpufreq_driver_lock, flags);
-        list_for_each_entry(tpolicy, &cpufreq_policy_list, policy_list) {
-                if (cpumask_test_cpu(cpu, tpolicy->related_cpus)) {
+        for_each_online_cpu(sibling) {
+                struct cpufreq_policy *cp = per_cpu(cpufreq_cpu_data, sibling);
+                if (cp && cpumask_test_cpu(cpu, cp->related_cpus)) {
                         read_unlock_irqrestore(&cpufreq_driver_lock, flags);
-                        ret = cpufreq_add_policy_cpu(tpolicy, cpu, dev, frozen);
+                        ret = cpufreq_add_policy_cpu(cp, cpu, dev, frozen);
                         up_read(&cpufreq_rwsem);
                         return ret;
                 }