[Xen-devel] [PATCH 5/9] x86/intel_pstate: relocate the driver register/unregister function

[Wei Wang <wei.w.wang@xxxxxxxxx>]

Register/unregister the CPU hotplug notifier when the driver is registered, and 
move the driver register/unregister function to the cpufreq.c.

Signed-off-by: Wei Wang <wei.w.wang@xxxxxxxxx>
---
 xen/drivers/cpufreq/cpufreq.c      | 27 +++++++++++++++++++++++----
 xen/include/acpi/cpufreq/cpufreq.h | 28 ++--------------------------
 2 files changed, 25 insertions(+), 30 deletions(-)

diff --git a/xen/drivers/cpufreq/cpufreq.c b/xen/drivers/cpufreq/cpufreq.c
index ab66884..1a03404 100644
--- a/xen/drivers/cpufreq/cpufreq.c
+++ b/xen/drivers/cpufreq/cpufreq.c
@@ -630,12 +630,31 @@ static struct notifier_block cpu_nfb = {
     .notifier_call = cpu_callback
 };
 
-static int __init cpufreq_presmp_init(void)
+int cpufreq_register_driver(struct cpufreq_driver *driver_data)
 {
-    void *cpu = (void *)(long)smp_processor_id();
-    cpu_callback(&cpu_nfb, CPU_ONLINE, cpu);
+    if (!driver_data || !driver_data->init
+        || !driver_data->verify || !driver_data->exit
+        || (!driver_data->target == !driver_data->setpolicy))
+        return -EINVAL;
+
+    if (cpufreq_driver)
+        return -EBUSY;
+
+    cpufreq_driver = driver_data;
+
     register_cpu_notifier(&cpu_nfb);
+
     return 0;
 }
-presmp_initcall(cpufreq_presmp_init);
 
+int cpufreq_unregister_driver(struct cpufreq_driver *driver)
+{
+    if (!cpufreq_driver || (driver != cpufreq_driver))
+        return -EINVAL;
+
+    cpufreq_driver = NULL;
+
+    unregister_cpu_notifier(&cpu_nfb);
+
+    return 0;
+}
diff --git a/xen/include/acpi/cpufreq/cpufreq.h 
b/xen/include/acpi/cpufreq/cpufreq.h
index 29d184c..e288964 100644
--- a/xen/include/acpi/cpufreq/cpufreq.h
+++ b/xen/include/acpi/cpufreq/cpufreq.h
@@ -166,32 +166,8 @@ struct cpufreq_driver {
 
 extern struct cpufreq_driver *cpufreq_driver;
 
-static __inline__ 
-int cpufreq_register_driver(struct cpufreq_driver *driver_data)
-{
-    if (!driver_data         || 
-        !driver_data->init   || 
-        !driver_data->exit   || 
-        !driver_data->verify || 
-        !driver_data->target)
-        return -EINVAL;
-
-    if (cpufreq_driver)
-        return -EBUSY;
-
-    cpufreq_driver = driver_data;
-    return 0;
-}
-
-static __inline__ 
-int cpufreq_unregister_driver(struct cpufreq_driver *driver)
-{
-    if (!cpufreq_driver || (driver != cpufreq_driver))
-        return -EINVAL;
-
-    cpufreq_driver = NULL;
-    return 0;
-}
+extern int cpufreq_register_driver(struct cpufreq_driver *driver_data);
+extern int cpufreq_unregister_driver(struct cpufreq_driver *driver);
 
 static __inline__
 void cpufreq_verify_within_limits(struct cpufreq_policy *policy,
-- 
1.9.1


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