tcp: remove ack_time from struct tcp_sacktag_state

It is no longer needed, everything uses tp->tcp_mstamp instead.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Soheil Hassas Yeganeh <soheil@google.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 0 insertions, 4 deletions

diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index f4e1836c696c..f475f0b53bfe 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -1131,7 +1131,6 @@ struct tcp_sacktag_state {
          */
         struct skb_mstamp first_sackt;
         struct skb_mstamp last_sackt;
-        struct skb_mstamp ack_time; /* Timestamp when the S/ACK was received */
         struct rate_sample *rate;
         int     flag;
 };
@@ -3572,8 +3571,6 @@ static int tcp_ack(struct sock *sk, const struct sk_buff *skb, int flag)
         if (after(ack, tp->snd_nxt))
                 goto invalid_ack;
 
-        skb_mstamp_get(&sack_state.ack_time);
-
         if (icsk->icsk_pending == ICSK_TIME_LOSS_PROBE)
                 tcp_rearm_rto(sk);
 
@@ -3684,7 +3681,6 @@ old_ack:
          * If data was DSACKed, see if we can undo a cwnd reduction.
          */
         if (TCP_SKB_CB(skb)->sacked) {
-                skb_mstamp_get(&sack_state.ack_time);
                 flag |= tcp_sacktag_write_queue(sk, skb, prior_snd_una,
                                                 &sack_state);
                 tcp_fastretrans_alert(sk, acked, is_dupack, &flag, &rexmit);