#include "cpuidle.h"
-struct cpuidle_driver *cpuidle_curr_driver;
+static struct cpuidle_driver *cpuidle_curr_driver;
DEFINE_SPINLOCK(cpuidle_driver_lock);
/**
EXPORT_SYMBOL_GPL(cpuidle_register_driver);
+/**
+ * cpuidle_get_driver - return the current driver
+ */
+struct cpuidle_driver *cpuidle_get_driver(void)
+{
+ return cpuidle_curr_driver;
+}
+EXPORT_SYMBOL_GPL(cpuidle_get_driver);
+
/**
* cpuidle_unregister_driver - unregisters a driver
* @drv: the driver
*/
void cpuidle_unregister_driver(struct cpuidle_driver *drv)
{
- if (!drv)
+ if (drv != cpuidle_curr_driver) {
+ WARN(1, "invalid cpuidle_unregister_driver(%s)\n",
+ drv->name);
return;
+ }
spin_lock(&cpuidle_driver_lock);
cpuidle_curr_driver = NULL;