tcp: remove TCP_SKB_CB(skb)->when

After commit 740b0f1841f6 ("tcp: switch rtt estimations to usec resolution"),
we no longer need to maintain timestamps in two different fields.

TCP_SKB_CB(skb)->when can be removed, as same information sits in skb_mstamp.stamp_jiffies

Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 1 deletions

diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index 9c8b9f1dcf69..f97003ad0af5 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -2967,7 +2967,8 @@ void tcp_rearm_rto(struct sock *sk)
                 if (icsk->icsk_pending == ICSK_TIME_EARLY_RETRANS ||
                     icsk->icsk_pending == ICSK_TIME_LOSS_PROBE) {
                         struct sk_buff *skb = tcp_write_queue_head(sk);
-                        const u32 rto_time_stamp = TCP_SKB_CB(skb)->when + rto;
+                        const u32 rto_time_stamp =
+                                tcp_skb_timestamp(skb) + rto;
                         s32 delta = (s32)(rto_time_stamp - tcp_time_stamp);
                         /* delta may not be positive if the socket is locked
                          * when the retrans timer fires and is rescheduled.