-struct ao_task __xdata blink_0_task;
-struct ao_task __xdata blink_1_task;
-struct ao_task __xdata wakeup_task;
-struct ao_task __xdata beep_task;
-struct ao_task __xdata echo_task;
+struct ao_task blink_0_task;
+struct ao_task blink_1_task;
+struct ao_task wakeup_task;
+struct ao_task beep_task;
+struct ao_task echo_task;