1 files changed, 18 insertions, 0 deletions

diff --git a/sys/alpha/include/bus.h b/sys/alpha/include/bus.h
index 53eefd857541..8c6d3240b289 100644
--- a/sys/alpha/include/bus.h
+++ b/sys/alpha/include/bus.h
@@ -91,6 +91,24 @@ typedef u_int32_t		bus_space_handle_t;
 #define BUS_SPACE_UNRESTRICTED	(~0UL)
 
 /*
+ * Map a region of device bus space into CPU virtual address space.
+ */
+
+static __inline int bus_space_map(bus_space_tag_t t, bus_addr_t addr,
+				  bus_size_t size, int flags,
+				  bus_space_handle_t *bshp);
+
+static __inline int
+bus_space_map(bus_space_tag_t t __unused, bus_addr_t addr,
+	      bus_size_t size __unused, int flags __unused,
+	      bus_space_handle_t *bshp)
+{
+
+	*bshp = addr;
+	return (0);
+}
+
+/*
  * Unmap a region of device bus space.
  */