port_lock_key      39 drivers/tty/serial/serial_core.c static struct lock_class_key port_lock_key;
port_lock_key    2071 drivers/tty/serial/serial_core.c 		lockdep_set_class(&port->lock, &port_lock_key);
port_lock_key    2832 drivers/tty/serial/serial_core.c 		lockdep_set_class(&uport->lock, &port_lock_key);