xfrm: Const'ify address arguments to ->dst_lookup()

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index 567f08b..18f115a 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -267,8 +267,8 @@
 	struct dst_ops		*dst_ops;
 	void			(*garbage_collect)(struct net *net);
 	struct dst_entry	*(*dst_lookup)(struct net *net, int tos,
-					       xfrm_address_t *saddr,
-					       xfrm_address_t *daddr);
+					       const xfrm_address_t *saddr,
+					       const xfrm_address_t *daddr);
 	int			(*get_saddr)(struct net *net, xfrm_address_t *saddr, xfrm_address_t *daddr);
 	void			(*decode_session)(struct sk_buff *skb,
 						  struct flowi *fl,
diff --git a/net/ipv4/xfrm4_policy.c b/net/ipv4/xfrm4_policy.c
index 1e9844d..63aa88e 100644
--- a/net/ipv4/xfrm4_policy.c
+++ b/net/ipv4/xfrm4_policy.c
@@ -19,8 +19,8 @@
 static struct xfrm_policy_afinfo xfrm4_policy_afinfo;
 
 static struct dst_entry *xfrm4_dst_lookup(struct net *net, int tos,
-					  xfrm_address_t *saddr,
-					  xfrm_address_t *daddr)
+					  const xfrm_address_t *saddr,
+					  const xfrm_address_t *daddr)
 {
 	struct flowi fl = {
 		.fl4_dst = daddr->a4,
diff --git a/net/ipv6/xfrm6_policy.c b/net/ipv6/xfrm6_policy.c
index f2fa904..c128ca1 100644
--- a/net/ipv6/xfrm6_policy.c
+++ b/net/ipv6/xfrm6_policy.c
@@ -27,8 +27,8 @@
 static struct xfrm_policy_afinfo xfrm6_policy_afinfo;
 
 static struct dst_entry *xfrm6_dst_lookup(struct net *net, int tos,
-					  xfrm_address_t *saddr,
-					  xfrm_address_t *daddr)
+					  const xfrm_address_t *saddr,
+					  const xfrm_address_t *daddr)
 {
 	struct flowi fl = {};
 	struct dst_entry *dst;