--- zzzz-none-000/linux-2.6.32.61/include/net/route.h	2013-06-10 09:43:48.000000000 +0000
+++ ar9-7330-650/linux-2.6.32.61/include/net/route.h	2010-09-22 09:05:41.000000000 +0000
@@ -75,6 +75,11 @@
 	/* Miscellaneous cached information */
 	__be32			rt_spec_dst; /* RFC1122 specific destination */
 	struct inet_peer	*peer; /* long-living peer info */
+#ifdef	CONFIG_MAPPING
+	unsigned char		mapping;
+	__u32			src_prefix;
+	__u32			dst_prefix;
+#endif
 };
 
 struct ip_rt_acct