Revert to Fedora kernel-2.6.17-1.2187_FC5 patched with vs2.0.2.1; there are too many...

[linux-2.6.git] / kernel / power / pm.c

diff --git a/kernel/power/pm.c b/kernel/power/pm.c
index c50d152..84063ac 100644 (file)
--- a/kernel/power/pm.c
+++ b/kernel/power/pm.c
@@ -75,6 +75,42 @@ struct pm_dev *pm_register(pm_dev_t type,
        return dev;
 }
 
+static void __pm_unregister(struct pm_dev *dev)
+{
+       if (dev) {
+               list_del(&dev->entry);
+               kfree(dev);
+       }
+}
+
+/**
+ *     pm_unregister_all - unregister all devices with matching callback
+ *     @callback: callback function pointer
+ *
+ *     Unregister every device that would call the callback passed. This
+ *     is primarily meant as a helper function for loadable modules. It
+ *     enables a module to give up all its managed devices without keeping
+ *     its own private list.
+ */
+ 
+void pm_unregister_all(pm_callback callback)
+{
+       struct list_head *entry;
+
+       if (!callback)
+               return;
+
+       mutex_lock(&pm_devs_lock);
+       entry = pm_devs.next;
+       while (entry != &pm_devs) {
+               struct pm_dev *dev = list_entry(entry, struct pm_dev, entry);
+               entry = entry->next;
+               if (dev->callback == callback)
+                       __pm_unregister(dev);
+       }
+       mutex_unlock(&pm_devs_lock);
+}
+
 /**
  *     pm_send - send request to a single device
  *     @dev: device to send to
@@ -203,6 +239,7 @@ int pm_send_all(pm_request_t rqst, void *data)
 }
 
 EXPORT_SYMBOL(pm_register);
+EXPORT_SYMBOL(pm_unregister_all);
 EXPORT_SYMBOL(pm_send_all);
 EXPORT_SYMBOL(pm_active);