kernel: remove support for kernel 4.9

No target uses kernel 4.9 anymore.

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>

1 files changed, 0 insertions, 48 deletions

diff --git a/target/linux/generic/backport-4.9/024-2-tcp-tsq-remove-one-locked-operation-in-tcp_wfree.patch b/target/linux/generic/backport-4.9/024-2-tcp-tsq-remove-one-locked-operation-in-tcp_wfree.patch
deleted file mode 100644
index dfd9abf943..0000000000
--- a/target/linux/generic/backport-4.9/024-2-tcp-tsq-remove-one-locked-operation-in-tcp_wfree.patch
+++ /dev/null
@@ -1,48 +0,0 @@
-From 408f0a6c21e124cc4f6c7aa370b38aa47e55428d Mon Sep 17 00:00:00 2001
-From: Eric Dumazet <edumazet@google.com>
-Date: Sat, 3 Dec 2016 11:14:51 -0800
-Subject: [PATCH 02/10] tcp: tsq: remove one locked operation in tcp_wfree()
-
-Instead of atomically clear TSQ_THROTTLED and atomically set TSQ_QUEUED
-bits, use one cmpxchg() to perform a single locked operation.
-
-Since the following patch will also set TCP_TSQ_DEFERRED here,
-this cmpxchg() will make this addition free.
-
-Signed-off-by: Eric Dumazet <edumazet@google.com>
-Signed-off-by: David S. Miller <davem@davemloft.net>
----
- net/ipv4/tcp_output.c | 13 ++++++++++---
- 1 file changed, 10 insertions(+), 3 deletions(-)
-
---- a/net/ipv4/tcp_output.c
-+++ b/net/ipv4/tcp_output.c
-@@ -866,6 +866,7 @@ void tcp_wfree(struct sk_buff *skb)
- {
- 	struct sock *sk = skb->sk;
- 	struct tcp_sock *tp = tcp_sk(sk);
-+	unsigned long flags, nval, oval;
- 	int wmem;
- 
- 	/* Keep one reference on sk_wmem_alloc.
-@@ -883,11 +884,17 @@ void tcp_wfree(struct sk_buff *skb)
- 	if (wmem >= SKB_TRUESIZE(1) && this_cpu_ksoftirqd() == current)
- 		goto out;
- 
--	if (test_and_clear_bit(TSQ_THROTTLED, &tp->tsq_flags) &&
--	    !test_and_set_bit(TSQ_QUEUED, &tp->tsq_flags)) {
--		unsigned long flags;
-+	for (oval = READ_ONCE(tp->tsq_flags);; oval = nval) {
- 		struct tsq_tasklet *tsq;
- 
-+		if (!(oval & TSQF_THROTTLED) || (oval & TSQF_QUEUED))
-+			goto out;
-+
-+		nval = (oval & ~TSQF_THROTTLED) | TSQF_QUEUED;
-+		nval = cmpxchg(&tp->tsq_flags, oval, nval);
-+		if (nval != oval)
-+			continue;
-+
- 		/* queue this socket to tasklet queue */
- 		local_irq_save(flags);
- 		tsq = this_cpu_ptr(&tsq_tasklet);