openvswitch: Constify various function arguments

Help produce better optimized code.

Signed-off-by: Thomas Graf <tgraf@noironetworks.com>
Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
diff --git a/net/openvswitch/datapath.h b/net/openvswitch/datapath.h
index 8de9f7e..8389c1d 100644
--- a/net/openvswitch/datapath.h
+++ b/net/openvswitch/datapath.h
@@ -149,7 +149,7 @@
 #define rcu_dereference_ovsl(p)					\
 	rcu_dereference_check(p, lockdep_ovsl_is_held())
 
-static inline struct net *ovs_dp_get_net(struct datapath *dp)
+static inline struct net *ovs_dp_get_net(const struct datapath *dp)
 {
 	return read_pnet(&dp->net);
 }
@@ -192,7 +192,7 @@
 					 u8 cmd);
 
 int ovs_execute_actions(struct datapath *dp, struct sk_buff *skb,
-			struct sw_flow_actions *acts, struct sw_flow_key *);
+			const struct sw_flow_actions *, struct sw_flow_key *);
 
 void ovs_dp_notify_wq(struct work_struct *work);