openvswitch: fix a compilation error when CONFIG_INET is not setW!

Fix a openvswitch compilation error when CONFIG_INET is not set:

=====================================================
   In file included from include/net/geneve.h:4:0,
                       from net/openvswitch/flow_netlink.c:45:
		          include/net/udp_tunnel.h: In function 'udp_tunnel_handle_offloads':
			  >> include/net/udp_tunnel.h:100:2: error: implicit declaration of function 'iptunnel_handle_offloads' [-Werror=implicit-function-declaration]
			  >>      return iptunnel_handle_offloads(skb, udp_csum, type);
			  >>           ^
			  >>           >> include/net/udp_tunnel.h:100:2: warning: return makes pointer from integer without a cast
			  >>           >>    cc1: some warnings being treated as errors

=====================================================

Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Andy Zhou <azhou@nicira.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 21 insertions, 15 deletions

diff --git a/include/net/geneve.h b/include/net/geneve.h
index ce98865318bf..112132cf8e2e 100644
--- a/include/net/geneve.h
+++ b/include/net/geneve.h
@@ -1,22 +1,10 @@
 #ifndef __NET_GENEVE_H
 #define __NET_GENEVE_H  1
 
+#ifdef CONFIG_INET
 #include <net/udp_tunnel.h>
+#endif
 
-struct geneve_sock;
-
-typedef void (geneve_rcv_t)(struct geneve_sock *gs, struct sk_buff *skb);
-
-struct geneve_sock {
-        struct hlist_node       hlist;
-        geneve_rcv_t            *rcv;
-        void                    *rcv_data;
-        struct work_struct      del_work;
-        struct socket           *sock;
-        struct rcu_head         rcu;
-        atomic_t                refcnt;
-        struct udp_offload      udp_offloads;
-};
 
 /* Geneve Header:
  *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
@@ -74,6 +62,22 @@ struct genevehdr {
         struct geneve_opt options[];
 };
 
+#ifdef CONFIG_INET
+struct geneve_sock;
+
+typedef void (geneve_rcv_t)(struct geneve_sock *gs, struct sk_buff *skb);
+
+struct geneve_sock {
+        struct hlist_node       hlist;
+        geneve_rcv_t            *rcv;
+        void                    *rcv_data;
+        struct work_struct      del_work;
+        struct socket           *sock;
+        struct rcu_head         rcu;
+        atomic_t                refcnt;
+        struct udp_offload      udp_offloads;
+};
+
 #define GENEVE_VER 0
 #define GENEVE_BASE_HLEN (sizeof(struct udphdr) + sizeof(struct genevehdr))
 
@@ -88,4 +92,6 @@ int geneve_xmit_skb(struct geneve_sock *gs, struct rtable *rt,
                     __u8 ttl, __be16 df, __be16 src_port, __be16 dst_port,
                     __be16 tun_flags, u8 vni[3], u8 opt_len, u8 *opt,
                     bool xnet);
-#endif
+#endif /*ifdef CONFIG_INET */
+
+#endif /*ifdef__NET_GENEVE_H */