diff --git a/include/linux/tcp.h b/include/linux/tcp.h
index bc35e470..a051321 100644
--- a/include/linux/tcp.h
+++ b/include/linux/tcp.h
@@ -197,7 +197,8 @@
 	u8	do_early_retrans:1,/* Enable RFC5827 early-retransmit  */
 		syn_data:1,	/* SYN includes data */
 		syn_fastopen:1,	/* SYN includes Fast Open option */
-		syn_data_acked:1;/* data in SYN is acked by SYN-ACK */
+		syn_data_acked:1,/* data in SYN is acked by SYN-ACK */
+		is_cwnd_limited:1;/* forward progress limited by snd_cwnd? */
 	u32	tlp_high_seq;	/* snd_nxt at the time of TLP retransmit. */
 
 /* RTT measurement */
@@ -209,6 +210,8 @@
 
 	u32	packets_out;	/* Packets which are "in flight"	*/
 	u32	retrans_out;	/* Retransmitted packets out		*/
+	u32	max_packets_out;  /* max packets_out in last window */
+	u32	max_packets_seq;  /* right edge of max_packets_out flight */
 
 	u16	urg_data;	/* Saved octet of OOB data and control flags */
 	u8	ecn_flags;	/* ECN status bits.			*/
@@ -230,7 +233,6 @@
 	u32	snd_cwnd_clamp; /* Do not allow snd_cwnd to grow above this */
 	u32	snd_cwnd_used;
 	u32	snd_cwnd_stamp;
-	u32	lsnd_pending;	/* packets inflight or unsent since last xmit */
 	u32	prior_cwnd;	/* Congestion window at start of Recovery. */
 	u32	prr_delivered;	/* Number of newly delivered packets to
 				 * receiver in Recovery. */