Hibernation: Add PM_RESTORE_PREPARE and PM_POST_RESTORE notifiers (rev. 2)

Add PM_RESTORE_PREPARE and PM_POST_RESTORE notifiers to the PM core, to be used
in analogy with the existing PM_HIBERNATION_PREPARE and PM_POST_HIBERNATION
notifiers.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: "Rafael J. Wysocki" <rjw@sisk.pl>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/Documentation/power/notifiers.txt b/Documentation/power/notifiers.txt
index 9293e4b..ae1b7ec 100644
--- a/Documentation/power/notifiers.txt
+++ b/Documentation/power/notifiers.txt
@@ -28,6 +28,14 @@
 			hibernation.  Device drivers' .resume() callbacks have
 			been executed and tasks have been thawed.
 
+PM_RESTORE_PREPARE	The system is going to restore a hibernation image.
+			If all goes well the restored kernel will issue a
+			PM_POST_HIBERNATION notification.
+
+PM_POST_RESTORE		An error occurred during the hibernation restore.
+			Device drivers' .resume() callbacks have been executed
+			and tasks have been thawed.
+
 PM_SUSPEND_PREPARE	The system is preparing for a suspend.
 
 PM_POST_SUSPEND		The system has just resumed or an error occured during