tcp: tcp_init_wl / tcp_update_wl argument cleanup

The above functions from include/net/tcp.h have been defined with an
argument that they never use. The argument is 'u32 ack' which is never
used inside the function body, and thus it can be removed. The rest of
the patch involves the necessary changes to the function callers of the
above two functions.
Signed-off-by: NHantzis Fotis <xantzis@ceid.upatras.gr>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

include/net/tcp.h

@@ -825,12 +825,12 @@ static inline void tcp_push_pending_frames(struct sock *sk)
 	__tcp_push_pending_frames(sk, tcp_current_mss(sk, 1), tp->nonagle);
 }
 
-static inline void tcp_init_wl(struct tcp_sock *tp, u32 ack, u32 seq)
+static inline void tcp_init_wl(struct tcp_sock *tp, u32 seq)
 {
 	tp->snd_wl1 = seq;
 }
 
-static inline void tcp_update_wl(struct tcp_sock *tp, u32 ack, u32 seq)
+static inline void tcp_update_wl(struct tcp_sock *tp, u32 seq)
 {
 	tp->snd_wl1 = seq;
 }

net/ipv4/tcp_input.c

@@ -3416,7 +3416,7 @@ static int tcp_ack_update_window(struct sock *sk, struct sk_buff *skb, u32 ack,
 
 	if (tcp_may_update_window(tp, ack, ack_seq, nwin)) {
 		flag |= FLAG_WIN_UPDATE;
-		tcp_update_wl(tp, ack, ack_seq);
+		tcp_update_wl(tp, ack_seq);
 
 		if (tp->snd_wnd != nwin) {
 			tp->snd_wnd = nwin;
@@ -3621,7 +3621,7 @@ static int tcp_ack(struct sock *sk, struct sk_buff *skb, int flag)
 		 * No more checks are required.
 		 * Note, we use the fact that SND.UNA>=SND.WL2.
 		 */
-		tcp_update_wl(tp, ack, ack_seq);
+		tcp_update_wl(tp, ack_seq);
 		tp->snd_una = ack;
 		flag |= FLAG_WIN_UPDATE;
 
@@ -5418,7 +5418,7 @@ static int tcp_rcv_synsent_state_process(struct sock *sk, struct sk_buff *skb,
 		 * never scaled.
 		 */
 		tp->snd_wnd = ntohs(th->window);
-		tcp_init_wl(tp, TCP_SKB_CB(skb)->ack_seq, TCP_SKB_CB(skb)->seq);
+		tcp_init_wl(tp, TCP_SKB_CB(skb)->seq);
 
 		if (!tp->rx_opt.wscale_ok) {
 			tp->rx_opt.snd_wscale = tp->rx_opt.rcv_wscale = 0;
@@ -5679,8 +5679,7 @@ int tcp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
 				tp->snd_una = TCP_SKB_CB(skb)->ack_seq;
 				tp->snd_wnd = ntohs(th->window) <<
 					      tp->rx_opt.snd_wscale;
-				tcp_init_wl(tp, TCP_SKB_CB(skb)->ack_seq,
-					    TCP_SKB_CB(skb)->seq);
+				tcp_init_wl(tp, TCP_SKB_CB(skb)->seq);
 
 				/* tcp_ack considers this ACK as duplicate
 				 * and does not calculate rtt.

net/ipv4/tcp_minisocks.c

@@ -399,7 +399,7 @@ struct sock *tcp_create_openreq_child(struct sock *sk, struct request_sock *req,
 
 		tcp_prequeue_init(newtp);
 
-		tcp_init_wl(newtp, treq->snt_isn, treq->rcv_isn);
+		tcp_init_wl(newtp, treq->rcv_isn);
 
 		newtp->srtt = 0;
 		newtp->mdev = TCP_TIMEOUT_INIT;

net/ipv4/tcp_output.c

@@ -2337,7 +2337,7 @@ static void tcp_connect_init(struct sock *sk)
 	sk->sk_err = 0;
 	sock_reset_flag(sk, SOCK_DONE);
 	tp->snd_wnd = 0;
-	tcp_init_wl(tp, tp->write_seq, 0);
+	tcp_init_wl(tp, 0);
 	tp->snd_una = tp->write_seq;
 	tp->snd_sml = tp->write_seq;
 	tp->snd_up = tp->write_seq;