diff --git a/[refs] b/[refs]
index 3568f507799b..9a232d8c0bd0 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: b4e26f5ea0dbdd1e813c5571fb467022d8eb948a
+refs/heads/master: a56476962e92a6c389a1a561274d4a27607b7b5f
diff --git a/trunk/net/ipv4/tcp_input.c b/trunk/net/ipv4/tcp_input.c
index b27be2f819ac..1dba7fd438da 100644
--- a/trunk/net/ipv4/tcp_input.c
+++ b/trunk/net/ipv4/tcp_input.c
@@ -1957,15 +1957,6 @@ static inline void tcp_ack_packets_out(struct sock *sk, struct tcp_sock *tp)
 	}
 }
 
-/* There is one downside to this scheme.  Although we keep the
- * ACK clock ticking, adjusting packet counters and advancing
- * congestion window, we do not liberate socket send buffer
- * space.
- *
- * Mucking with skb->truesize and sk->sk_wmem_alloc et al.
- * then making a write space wakeup callback is a possible
- * future enhancement.  WARNING: it is not trivial to make.
- */
 static int tcp_tso_acked(struct sock *sk, struct sk_buff *skb,
 			 __u32 now, __s32 *seq_rtt)
 {