[IPSEC]: Add xfrm_init_state

This patch adds xfrm_init_state which is simply a wrapper that calls
xfrm_get_type and subsequently x->type->init_state.  It also gets rid
of the unused args argument.

Abstracting it out allows us to add common initialisation code, e.g.,
to set family-specific flags.

The add_time setting in xfrm_user.c was deleted because it's already
set by xfrm_state_alloc.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: James Morris <jmorris@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/ipcomp.c b/net/ipv4/ipcomp.c
index 1a23c52..2065944 100644
--- a/net/ipv4/ipcomp.c
+++ b/net/ipv4/ipcomp.c
@@ -236,15 +236,10 @@
 	t->props.mode = 1;
 	t->props.saddr.a4 = x->props.saddr.a4;
 	t->props.flags = x->props.flags;
-	
-	t->type = xfrm_get_type(IPPROTO_IPIP, t->props.family);
-	if (t->type == NULL)
-		goto error;
-		
-	if (t->type->init_state(t, NULL))
+
+	if (xfrm_init_state(t))
 		goto error;
 
-	t->km.state = XFRM_STATE_VALID;
 	atomic_set(&t->tunnel_users, 1);
 out:
 	return t;
@@ -422,7 +417,7 @@
 	kfree(ipcd);
 }
 
-static int ipcomp_init_state(struct xfrm_state *x, void *args)
+static int ipcomp_init_state(struct xfrm_state *x)
 {
 	int err;
 	struct ipcomp_data *ipcd;