diff -Nur linux-3.10.30.orig/fs/Kconfig linux-3.10.30/fs/Kconfig
--- linux-3.10.30.orig/fs/Kconfig	2014-02-13 22:48:15.000000000 +0100
+++ linux-3.10.30/fs/Kconfig	2014-05-19 20:41:23.637038598 +0200
@@ -51,7 +51,7 @@
 	def_bool n
 
 config EXPORTFS
-	tristate
+	def_bool y
 
 config FILE_LOCKING
 	bool "Enable POSIX file locking API" if EXPERT