cpufreq: create cpu/cpufreq/policyX directories
The cpufreq sysfs interface had been a bit inconsistent as one of the
CPUs for a policy had a real directory within its sysfs 'cpuX' directory
and all other CPUs had links to it. That also made the code a bit
complex as we need to take care of moving the sysfs directory if the CPU
containing the real directory is getting physically hot-unplugged.
Solve this by creating 'policyX' directories (per-policy) in
/sys/devices/system/cpu/cpufreq/ directory, where X is the CPU for which
the policy was first created.
This also removes the need of keeping kobj_cpu and we can remove it now.
Suggested-by: Saravana Kannan <skannan@codeaurora.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Saravana Kannan <skannan@codeaurora.org>
Acked-by: is more of a general agreement from the person that he is
Reviewed-by: is a more strict tag and implies that the reviewer has
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index 04222e7..4fa2215 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -910,9 +910,6 @@
/* Some related CPUs might not be present (physically hotplugged) */
for_each_cpu(j, policy->real_cpus) {
- if (j == policy->kobj_cpu)
- continue;
-
ret = add_cpu_dev_symlink(policy, j);
if (ret)
break;
@@ -926,12 +923,8 @@
unsigned int j;
/* Some related CPUs might not be present (physically hotplugged) */
- for_each_cpu(j, policy->real_cpus) {
- if (j == policy->kobj_cpu)
- continue;
-
+ for_each_cpu(j, policy->real_cpus)
remove_cpu_dev_symlink(policy, j);
- }
}
static int cpufreq_add_dev_interface(struct cpufreq_policy *policy)
@@ -1047,8 +1040,8 @@
if (!zalloc_cpumask_var(&policy->real_cpus, GFP_KERNEL))
goto err_free_rcpumask;
- ret = kobject_init_and_add(&policy->kobj, &ktype_cpufreq, &dev->kobj,
- "cpufreq");
+ ret = kobject_init_and_add(&policy->kobj, &ktype_cpufreq,
+ cpufreq_global_kobject, "policy%u", cpu);
if (ret) {
pr_err("%s: failed to init policy->kobj: %d\n", __func__, ret);
goto err_free_real_cpus;
@@ -1062,10 +1055,6 @@
INIT_WORK(&policy->update, handle_update);
policy->cpu = cpu;
-
- /* Set this once on allocation */
- policy->kobj_cpu = cpu;
-
return policy;
err_free_real_cpus:
@@ -1417,22 +1406,7 @@
return;
}
- if (cpu != policy->kobj_cpu) {
- remove_cpu_dev_symlink(policy, cpu);
- } else {
- /*
- * The CPU owning the policy object is going away. Move it to
- * another suitable CPU.
- */
- unsigned int new_cpu = cpumask_first(policy->real_cpus);
- struct device *new_dev = get_cpu_device(new_cpu);
-
- dev_dbg(dev, "%s: Moving policy object to CPU%u\n", __func__, new_cpu);
-
- sysfs_remove_link(&new_dev->kobj, "cpufreq");
- policy->kobj_cpu = new_cpu;
- WARN_ON(kobject_move(&policy->kobj, &new_dev->kobj));
- }
+ remove_cpu_dev_symlink(policy, cpu);
}
static void handle_update(struct work_struct *work)