lwt: Remove unused len field

The field is initialized by ILA and MPLS but never used. Remove it.
Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/lwtunnel.h

@@ -24,11 +24,10 @@ enum {
 struct lwtunnel_state {
 	__u16		type;
 	__u16		flags;
+	__u16		headroom;
 	atomic_t	refcnt;
 	int		(*orig_output)(struct net *net, struct sock *sk, struct sk_buff *skb);
 	int		(*orig_input)(struct sk_buff *);
-	int             len;
-	__u16		headroom;
 	struct		rcu_head rcu;
 	__u8            data[0];
 };

net/ipv6/ila/ila_lwt.c

@@ -122,7 +122,6 @@ static int ila_build_state(struct net_device *dev, struct nlattr *nla,
 	struct ila_lwt *ilwt;
 	struct ila_params *p;
 	struct nlattr *tb[ILA_ATTR_MAX + 1];
-	size_t encap_len = sizeof(*ilwt);
 	struct lwtunnel_state *newts;
 	const struct fib6_config *cfg6 = cfg;
 	struct ila_addr *iaddr;
@@ -155,7 +154,7 @@ static int ila_build_state(struct net_device *dev, struct nlattr *nla,
 	if (!tb[ILA_ATTR_LOCATOR])
 		return -EINVAL;
 
-	newts = lwtunnel_state_alloc(encap_len);
+	newts = lwtunnel_state_alloc(sizeof(*ilwt));
 	if (!newts)
 		return -ENOMEM;
 
@@ -166,7 +165,6 @@ static int ila_build_state(struct net_device *dev, struct nlattr *nla,
 		return ret;
 	}
 
-	newts->len = encap_len;
 	p = ila_params_lwtunnel(newts);
 
 	p->locator.v64 = (__force __be64)nla_get_u64(tb[ILA_ATTR_LOCATOR]);

net/mpls/mpls_iptunnel.c

@@ -133,7 +133,6 @@ static int mpls_build_state(struct net_device *dev, struct nlattr *nla,
 	struct mpls_iptunnel_encap *tun_encap_info;
 	struct nlattr *tb[MPLS_IPTUNNEL_MAX + 1];
 	struct lwtunnel_state *newts;
-	int tun_encap_info_len;
 	int ret;
 
 	ret = nla_parse_nested(tb, MPLS_IPTUNNEL_MAX, nla,
@@ -144,13 +143,11 @@ static int mpls_build_state(struct net_device *dev, struct nlattr *nla,
 	if (!tb[MPLS_IPTUNNEL_DST])
 		return -EINVAL;
 
-	tun_encap_info_len = sizeof(*tun_encap_info);
 
-	newts = lwtunnel_state_alloc(tun_encap_info_len);
+	newts = lwtunnel_state_alloc(sizeof(*tun_encap_info));
 	if (!newts)
 		return -ENOMEM;
 
-	newts->len = tun_encap_info_len;
 	tun_encap_info = mpls_lwtunnel_encap(newts);
 	ret = nla_get_labels(tb[MPLS_IPTUNNEL_DST], MAX_NEW_LABELS,
 			     &tun_encap_info->labels, tun_encap_info->label);