diff --git a/include/uapi/linux/l2tp.h b/include/uapi/linux/l2tp.h
index 7d570c7bd117cf68510c9ee9e8b808ce90c0d89e..8bb8c7cfabe515fc737e3ce21b4fd6f3607aab3f 100644
--- a/include/uapi/linux/l2tp.h
+++ b/include/uapi/linux/l2tp.h
@@ -60,14 +60,14 @@ struct sockaddr_l2tpip6 {
 /*
  * Commands.
  * Valid TLVs of each command are:-
- * TUNNEL_CREATE	- CONN_ID, pw_type, netns, ifname, ipinfo, udpinfo, udpcsum, vlanid
+ * TUNNEL_CREATE	- CONN_ID, pw_type, netns, ifname, ipinfo, udpinfo, udpcsum
  * TUNNEL_DELETE	- CONN_ID
  * TUNNEL_MODIFY	- CONN_ID, udpcsum
  * TUNNEL_GETSTATS	- CONN_ID, (stats)
  * TUNNEL_GET		- CONN_ID, (...)
- * SESSION_CREATE	- SESSION_ID, PW_TYPE, data_seq, cookie, peer_cookie, l2spec
+ * SESSION_CREATE	- SESSION_ID, PW_TYPE, cookie, peer_cookie, l2spec
  * SESSION_DELETE	- SESSION_ID
- * SESSION_MODIFY	- SESSION_ID, data_seq
+ * SESSION_MODIFY	- SESSION_ID
  * SESSION_GET		- SESSION_ID, (...)
  * SESSION_GETSTATS	- SESSION_ID, (stats)
  *
@@ -95,7 +95,7 @@ enum {
 	L2TP_ATTR_PW_TYPE,		/* u16, enum l2tp_pwtype */
 	L2TP_ATTR_ENCAP_TYPE,		/* u16, enum l2tp_encap_type */
 	L2TP_ATTR_OFFSET,		/* u16 (not used) */
-	L2TP_ATTR_DATA_SEQ,		/* u16 */
+	L2TP_ATTR_DATA_SEQ,		/* u16 (not used) */
 	L2TP_ATTR_L2SPEC_TYPE,		/* u8, enum l2tp_l2spec_type */
 	L2TP_ATTR_L2SPEC_LEN,		/* u8 (not used) */
 	L2TP_ATTR_PROTO_VERSION,	/* u8 */
@@ -105,7 +105,7 @@ enum {
 	L2TP_ATTR_SESSION_ID,		/* u32 */
 	L2TP_ATTR_PEER_SESSION_ID,	/* u32 */
 	L2TP_ATTR_UDP_CSUM,		/* u8 */
-	L2TP_ATTR_VLAN_ID,		/* u16 */
+	L2TP_ATTR_VLAN_ID,		/* u16 (not used) */
 	L2TP_ATTR_COOKIE,		/* 0, 4 or 8 bytes */
 	L2TP_ATTR_PEER_COOKIE,		/* 0, 4 or 8 bytes */
 	L2TP_ATTR_DEBUG,		/* u32, enum l2tp_debug_flags */
@@ -120,7 +120,7 @@ enum {
 	L2TP_ATTR_UDP_SPORT,		/* u16 */
 	L2TP_ATTR_UDP_DPORT,		/* u16 */
 	L2TP_ATTR_MTU,			/* u16 */
-	L2TP_ATTR_MRU,			/* u16 */
+	L2TP_ATTR_MRU,			/* u16 (not used) */
 	L2TP_ATTR_STATS,		/* nested */
 	L2TP_ATTR_IP6_SADDR,		/* struct in6_addr */
 	L2TP_ATTR_IP6_DADDR,		/* struct in6_addr */
@@ -169,6 +169,7 @@ enum l2tp_encap_type {
 	L2TP_ENCAPTYPE_IP,
 };
 
+/* For L2TP_ATTR_DATA_SEQ. Unused. */
 enum l2tp_seqmode {
 	L2TP_SEQ_NONE = 0,
 	L2TP_SEQ_IP = 1,
diff --git a/net/l2tp/l2tp_core.c b/net/l2tp/l2tp_core.c
index d10f4ed52d9202c359fb8e3c15f320fa0985d183..c61a467fd9b8198fd535c50ca2f2d1140930594d 100644
--- a/net/l2tp/l2tp_core.c
+++ b/net/l2tp/l2tp_core.c
@@ -1675,7 +1675,6 @@ struct l2tp_session *l2tp_session_create(int priv_size, struct l2tp_tunnel *tunn
 			session->pwtype = cfg->pw_type;
 			session->debug = cfg->debug;
 			session->mtu = cfg->mtu;
-			session->mru = cfg->mru;
 			session->send_seq = cfg->send_seq;
 			session->recv_seq = cfg->recv_seq;
 			session->lns_mode = cfg->lns_mode;
diff --git a/net/l2tp/l2tp_core.h b/net/l2tp/l2tp_core.h
index d85fde793a8c94493aa72b77486261b2b51e0a6d..fa5ae9432d389ac6458cf0926cacb2cbbf67aa11 100644
--- a/net/l2tp/l2tp_core.h
+++ b/net/l2tp/l2tp_core.h
@@ -45,10 +45,6 @@ struct l2tp_tunnel;
  */
 struct l2tp_session_cfg {
 	enum l2tp_pwtype	pw_type;
-	unsigned int		data_seq:2;	/* data sequencing level
-						 * 0 => none, 1 => IP only,
-						 * 2 => all
-						 */
 	unsigned int		recv_seq:1;	/* expect receive packets with
 						 * sequence numbers? */
 	unsigned int		send_seq:1;	/* send packets with sequence
@@ -58,7 +54,6 @@ struct l2tp_session_cfg {
 						 * control of LNS. */
 	int			debug;		/* bitmask of debug message
 						 * categories */
-	u16			vlan_id;	/* VLAN pseudowire only */
 	u16			l2specific_type; /* Layer 2 specific type */
 	u8			cookie[8];	/* optional cookie */
 	int			cookie_len;	/* 0, 4 or 8 bytes */
@@ -67,7 +62,6 @@ struct l2tp_session_cfg {
 	int			reorder_timeout; /* configured reorder timeout
 						  * (in jiffies) */
 	int			mtu;
-	int			mru;
 	char			*ifname;
 };
 
@@ -99,10 +93,6 @@ struct l2tp_session {
 
 	char			name[32];	/* for logging */
 	char			ifname[IFNAMSIZ];
-	unsigned int		data_seq:2;	/* data sequencing level
-						 * 0 => none, 1 => IP only,
-						 * 2 => all
-						 */
 	unsigned int		recv_seq:1;	/* expect receive packets with
 						 * sequence numbers? */
 	unsigned int		send_seq:1;	/* send packets with sequence
@@ -116,7 +106,6 @@ struct l2tp_session {
 						  * (in jiffies) */
 	int			reorder_skip;	/* set if skip to next nr */
 	int			mtu;
-	int			mru;
 	enum l2tp_pwtype	pwtype;
 	struct l2tp_stats	stats;
 	struct hlist_node	global_hlist;	/* Global hash list node */
diff --git a/net/l2tp/l2tp_debugfs.c b/net/l2tp/l2tp_debugfs.c
index b5d7dde003ef9f2fa6c39bf5940ee523cbc7ea53..aee271741f5b194cd8ce1e392dafe2292d0221ac 100644
--- a/net/l2tp/l2tp_debugfs.c
+++ b/net/l2tp/l2tp_debugfs.c
@@ -191,12 +191,10 @@ static void l2tp_dfs_seq_session_show(struct seq_file *m, void *v)
 	if (session->send_seq || session->recv_seq)
 		seq_printf(m, "   nr %hu, ns %hu\n", session->nr, session->ns);
 	seq_printf(m, "   refcnt %d\n", refcount_read(&session->ref_count));
-	seq_printf(m, "   config %d/%d/%c/%c/%s/%s %08x %u\n",
-		   session->mtu, session->mru,
+	seq_printf(m, "   config %d/0/%c/%c/-/%s %08x %u\n",
+		   session->mtu,
 		   session->recv_seq ? 'R' : '-',
 		   session->send_seq ? 'S' : '-',
-		   session->data_seq == 1 ? "IPSEQ" :
-		   session->data_seq == 2 ? "DATASEQ" : "-",
 		   session->lns_mode ? "LNS" : "LAC",
 		   session->debug,
 		   jiffies_to_msecs(session->reorder_timeout));
diff --git a/net/l2tp/l2tp_netlink.c b/net/l2tp/l2tp_netlink.c
index 5b9900889e311f964c4d7640f152a60edfb02740..a7c409215336e3a9c7ee7d901a520218940dd91f 100644
--- a/net/l2tp/l2tp_netlink.c
+++ b/net/l2tp/l2tp_netlink.c
@@ -560,9 +560,6 @@ static int l2tp_nl_cmd_session_create(struct sk_buff *skb, struct genl_info *inf
 	}
 
 	if (tunnel->version > 2) {
-		if (info->attrs[L2TP_ATTR_DATA_SEQ])
-			cfg.data_seq = nla_get_u8(info->attrs[L2TP_ATTR_DATA_SEQ]);
-
 		if (info->attrs[L2TP_ATTR_L2SPEC_TYPE]) {
 			cfg.l2specific_type = nla_get_u8(info->attrs[L2TP_ATTR_L2SPEC_TYPE]);
 			if (cfg.l2specific_type != L2TP_L2SPECTYPE_DEFAULT &&
@@ -594,9 +591,6 @@ static int l2tp_nl_cmd_session_create(struct sk_buff *skb, struct genl_info *inf
 		}
 		if (info->attrs[L2TP_ATTR_IFNAME])
 			cfg.ifname = nla_data(info->attrs[L2TP_ATTR_IFNAME]);
-
-		if (info->attrs[L2TP_ATTR_VLAN_ID])
-			cfg.vlan_id = nla_get_u16(info->attrs[L2TP_ATTR_VLAN_ID]);
 	}
 
 	if (info->attrs[L2TP_ATTR_DEBUG])
@@ -617,9 +611,6 @@ static int l2tp_nl_cmd_session_create(struct sk_buff *skb, struct genl_info *inf
 	if (info->attrs[L2TP_ATTR_MTU])
 		cfg.mtu = nla_get_u16(info->attrs[L2TP_ATTR_MTU]);
 
-	if (info->attrs[L2TP_ATTR_MRU])
-		cfg.mru = nla_get_u16(info->attrs[L2TP_ATTR_MRU]);
-
 #ifdef CONFIG_MODULES
 	if (l2tp_nl_cmd_ops[cfg.pw_type] == NULL) {
 		genl_unlock();
@@ -693,9 +684,6 @@ static int l2tp_nl_cmd_session_modify(struct sk_buff *skb, struct genl_info *inf
 	if (info->attrs[L2TP_ATTR_DEBUG])
 		session->debug = nla_get_u32(info->attrs[L2TP_ATTR_DEBUG]);
 
-	if (info->attrs[L2TP_ATTR_DATA_SEQ])
-		session->data_seq = nla_get_u8(info->attrs[L2TP_ATTR_DATA_SEQ]);
-
 	if (info->attrs[L2TP_ATTR_RECV_SEQ])
 		session->recv_seq = nla_get_u8(info->attrs[L2TP_ATTR_RECV_SEQ]);
 
@@ -713,9 +701,6 @@ static int l2tp_nl_cmd_session_modify(struct sk_buff *skb, struct genl_info *inf
 	if (info->attrs[L2TP_ATTR_MTU])
 		session->mtu = nla_get_u16(info->attrs[L2TP_ATTR_MTU]);
 
-	if (info->attrs[L2TP_ATTR_MRU])
-		session->mru = nla_get_u16(info->attrs[L2TP_ATTR_MRU]);
-
 	ret = l2tp_session_notify(&l2tp_nl_family, info,
 				  session, L2TP_CMD_SESSION_MODIFY);
 
@@ -746,9 +731,7 @@ static int l2tp_nl_session_send(struct sk_buff *skb, u32 portid, u32 seq, int fl
 			session->peer_session_id) ||
 	    nla_put_u32(skb, L2TP_ATTR_DEBUG, session->debug) ||
 	    nla_put_u16(skb, L2TP_ATTR_PW_TYPE, session->pwtype) ||
-	    nla_put_u16(skb, L2TP_ATTR_MTU, session->mtu) ||
-	    (session->mru &&
-	     nla_put_u16(skb, L2TP_ATTR_MRU, session->mru)))
+	    nla_put_u16(skb, L2TP_ATTR_MTU, session->mtu))
 		goto nla_put_failure;
 
 	if ((session->ifname[0] &&
diff --git a/net/l2tp/l2tp_ppp.c b/net/l2tp/l2tp_ppp.c
index 000c9829304c013ec83e32d22a4057f09e484284..44cac66284a503cd7e0eff4fc150590926bd663a 100644
--- a/net/l2tp/l2tp_ppp.c
+++ b/net/l2tp/l2tp_ppp.c
@@ -127,8 +127,6 @@ struct pppol2tp_session {
 						 * PPPoX socket */
 	struct sock		*__sk;		/* Copy of .sk, for cleanup */
 	struct rcu_head		rcu;		/* For asynchronous release */
-	int			flags;		/* accessed by PPPIOCGFLAGS.
-						 * Unused. */
 };
 
 static int pppol2tp_xmit(struct ppp_channel *chan, struct sk_buff *skb);
@@ -572,10 +570,9 @@ static void pppol2tp_session_init(struct l2tp_session *session)
 	if (dst) {
 		u32 pmtu = dst_mtu(dst);
 
-		if (pmtu) {
+		if (pmtu)
 			session->mtu = pmtu - PPPOL2TP_HEADER_OVERHEAD;
-			session->mru = pmtu - PPPOL2TP_HEADER_OVERHEAD;
-		}
+
 		dst_release(dst);
 	}
 }
@@ -783,7 +780,6 @@ static int pppol2tp_connect(struct socket *sock, struct sockaddr *uservaddr,
 	} else {
 		/* Default MTU must allow space for UDP/L2TP/PPP headers */
 		cfg.mtu = 1500 - PPPOL2TP_HEADER_OVERHEAD;
-		cfg.mru = cfg.mtu;
 		cfg.pw_type = L2TP_PWTYPE_PPP;
 
 		session = l2tp_session_create(sizeof(struct pppol2tp_session),
@@ -887,8 +883,6 @@ static int pppol2tp_session_create(struct net *net, struct l2tp_tunnel *tunnel,
 	/* Default MTU values. */
 	if (cfg->mtu == 0)
 		cfg->mtu = 1500 - PPPOL2TP_HEADER_OVERHEAD;
-	if (cfg->mru == 0)
-		cfg->mru = cfg->mtu;
 
 	/* Allocate and initialize a new session context. */
 	session = l2tp_session_create(sizeof(struct pppol2tp_session),
@@ -1057,7 +1051,6 @@ static int pppol2tp_session_ioctl(struct l2tp_session *session,
 	int err = 0;
 	struct sock *sk;
 	int val = (int) arg;
-	struct pppol2tp_session *ps = l2tp_session_priv(session);
 	struct l2tp_tunnel *tunnel = session->tunnel;
 	struct pppol2tp_ioc_stats stats;
 
@@ -1104,51 +1097,18 @@ static int pppol2tp_session_ioctl(struct l2tp_session *session,
 		break;
 
 	case PPPIOCGMRU:
-		err = -ENXIO;
-		if (!(sk->sk_state & PPPOX_CONNECTED))
-			break;
-
-		err = -EFAULT;
-		if (put_user(session->mru, (int __user *) arg))
-			break;
-
-		l2tp_info(session, L2TP_MSG_CONTROL, "%s: get mru=%d\n",
-			  session->name, session->mru);
-		err = 0;
-		break;
-
-	case PPPIOCSMRU:
-		err = -ENXIO;
-		if (!(sk->sk_state & PPPOX_CONNECTED))
-			break;
-
-		err = -EFAULT;
-		if (get_user(val, (int __user *) arg))
-			break;
-
-		session->mru = val;
-		l2tp_info(session, L2TP_MSG_CONTROL, "%s: set mru=%d\n",
-			  session->name, session->mru);
-		err = 0;
-		break;
-
 	case PPPIOCGFLAGS:
 		err = -EFAULT;
-		if (put_user(ps->flags, (int __user *) arg))
+		if (put_user(0, (int __user *)arg))
 			break;
-
-		l2tp_info(session, L2TP_MSG_CONTROL, "%s: get flags=%d\n",
-			  session->name, ps->flags);
 		err = 0;
 		break;
 
+	case PPPIOCSMRU:
 	case PPPIOCSFLAGS:
 		err = -EFAULT;
-		if (get_user(val, (int __user *) arg))
+		if (get_user(val, (int __user *)arg))
 			break;
-		ps->flags = val;
-		l2tp_info(session, L2TP_MSG_CONTROL, "%s: set flags=%d\n",
-			  session->name, ps->flags);
 		err = 0;
 		break;
 
@@ -1732,8 +1692,8 @@ static void pppol2tp_seq_session_show(struct seq_file *m, void *v)
 		   tunnel->peer_tunnel_id,
 		   session->peer_session_id,
 		   state, user_data_ok);
-	seq_printf(m, "   %d/%d/%c/%c/%s %08x %u\n",
-		   session->mtu, session->mru,
+	seq_printf(m, "   %d/0/%c/%c/%s %08x %u\n",
+		   session->mtu,
 		   session->recv_seq ? 'R' : '-',
 		   session->send_seq ? 'S' : '-',
 		   session->lns_mode ? "LNS" : "LAC",