kernel: remove support for kernel 4.9

[openwrt/staging/dedeckeh.git] / target / linux / generic / backport-4.9 / 024-6-tcp-tcp_mtu_probe-is-likely-to-exit-early.patch

diff --git a/target/linux/generic/backport-4.9/024-6-tcp-tcp_mtu_probe-is-likely-to-exit-early.patch b/target/linux/generic/backport-4.9/024-6-tcp-tcp_mtu_probe-is-likely-to-exit-early.patch
deleted file mode 100644 (file)
index 5669b89..0000000
--- a/target/linux/generic/backport-4.9/024-6-tcp-tcp_mtu_probe-is-likely-to-exit-early.patch
+++ /dev/null
@@ -1,55 +0,0 @@
-From 12a59abc22d6664f7d3944f625ceefee92de8820 Mon Sep 17 00:00:00 2001
-From: Eric Dumazet <edumazet@google.com>
-Date: Sat, 3 Dec 2016 11:14:55 -0800
-Subject: [PATCH 06/10] tcp: tcp_mtu_probe() is likely to exit early
-
-Adding a likely() in tcp_mtu_probe() moves its code which used to
-be inlined in front of tcp_write_xmit()
-
-We still have a cache line miss to access icsk->icsk_mtup.enabled,
-we will probably have to reorganize fields to help data locality.
-
-Signed-off-by: Eric Dumazet <edumazet@google.com>
-Signed-off-by: David S. Miller <davem@davemloft.net>
----
- net/ipv4/tcp_output.c | 18 +++++++++---------
- 1 file changed, 9 insertions(+), 9 deletions(-)
-
---- a/net/ipv4/tcp_output.c
-+++ b/net/ipv4/tcp_output.c
-@@ -1974,26 +1974,26 @@ static bool tcp_can_coalesce_send_queue_
-  */
- static int tcp_mtu_probe(struct sock *sk)
- {
--      struct tcp_sock *tp = tcp_sk(sk);
-       struct inet_connection_sock *icsk = inet_csk(sk);
-+      struct tcp_sock *tp = tcp_sk(sk);
-       struct sk_buff *skb, *nskb, *next;
-       struct net *net = sock_net(sk);
--      int len;
-       int probe_size;
-       int size_needed;
--      int copy;
-+      int copy, len;
-       int mss_now;
-       int interval;
- 
-       /* Not currently probing/verifying,
-        * not in recovery,
-        * have enough cwnd, and
--       * not SACKing (the variable headers throw things off) */
--      if (!icsk->icsk_mtup.enabled ||
--          icsk->icsk_mtup.probe_size ||
--          inet_csk(sk)->icsk_ca_state != TCP_CA_Open ||
--          tp->snd_cwnd < 11 ||
--          tp->rx_opt.num_sacks || tp->rx_opt.dsack)
-+       * not SACKing (the variable headers throw things off)
-+       */
-+      if (likely(!icsk->icsk_mtup.enabled ||
-+                 icsk->icsk_mtup.probe_size ||
-+                 inet_csk(sk)->icsk_ca_state != TCP_CA_Open ||
-+                 tp->snd_cwnd < 11 ||
-+                 tp->rx_opt.num_sacks || tp->rx_opt.dsack))
-               return -1;
- 
-       /* Use binary search for probe_size between tcp_mss_base,