gru_lock_async_resource 1063 drivers/misc/sgi-gru/grukservices.c 	gru_lock_async_resource(han, &cb0, NULL);
gru_lock_async_resource  191 drivers/misc/sgi-gru/grukservices.h extern void gru_lock_async_resource(unsigned long han,  void **cb, void **dsr);