diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
index 585bfd0..f51bf2e 100644
--- a/include/linux/serial_core.h
+++ b/include/linux/serial_core.h
@@ -383,6 +383,16 @@
 	void			*private_data;		/* generic platform data pointer */
 };
 
+static inline int serial_port_in(struct uart_port *up, int offset)
+{
+	return up->serial_in(up, offset);
+}
+
+static inline void serial_port_out(struct uart_port *up, int offset, int value)
+{
+	up->serial_out(up, offset, value);
+}
+
 /*
  * This is the state information which is persistent across opens.
  */