xfrm: Mark flowi arg to xfrm_expand_policies() const.

Signed-off-by: David S. Miller <davem@davemloft.net>

net/xfrm/xfrm_policy.c

diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index 4a5092a..84e4f74 100644
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -941,7 +941,7 @@
 }
 
 static struct xfrm_policy *
-__xfrm_policy_lookup(struct net *net, struct flowi *fl, u16 family, u8 dir)
+__xfrm_policy_lookup(struct net *net, const struct flowi *fl, u16 family, u8 dir)
 {
 #ifdef CONFIG_XFRM_SUB_POLICY
 	struct xfrm_policy *pol;
@@ -1542,7 +1542,7 @@
 #endif
 }
 
-static int xfrm_expand_policies(struct flowi *fl, u16 family,
+static int xfrm_expand_policies(const struct flowi *fl, u16 family,
 				struct xfrm_policy **pols,
 				int *num_pols, int *num_xfrms)
 {