diff --git a/[refs] b/[refs]
index 72f1e57ab0bb..478c6d1667be 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 24ed6ddd9cbf084f1a2dfa3ef66287e5277002e1
+refs/heads/master: 59433a59b073b88cb32efd03af8ac9b13d56f4cf
diff --git a/trunk/arch/m68k/Kconfig.bus b/trunk/arch/m68k/Kconfig.bus
index 8294f0c1785e..3adb499584fb 100644
--- a/trunk/arch/m68k/Kconfig.bus
+++ b/trunk/arch/m68k/Kconfig.bus
@@ -2,6 +2,15 @@ if MMU
 
 comment "Bus Support"
 
+config DIO
+	bool "DIO bus support"
+	depends on HP300
+	default y
+	help
+	  Say Y here to enable support for the "DIO" expansion bus used in
+	  HP300 machines. If you are using such a system you almost certainly
+	  want this.
+
 config NUBUS
 	bool
 	depends on MAC