kernel: drop everything not on kernel version 4.14

 * Remove testing patches for kernel version 4.19
 * remove targets ar7, ixp4xx, orion
Those targets are still on kernel 4.9, patches for 4.14 were not ready
in time. They may be readded once people prepare and test patches for
kernel 4.14.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

1 files changed, 0 insertions, 38 deletions

diff --git a/target/linux/generic/backport-4.9/024-4-tcp-tsq-avoid-one-atomic-in-tcp_wfree.patch b/target/linux/generic/backport-4.9/024-4-tcp-tsq-avoid-one-atomic-in-tcp_wfree.patch
deleted file mode 100644
index 87452ac853..0000000000
--- a/target/linux/generic/backport-4.9/024-4-tcp-tsq-avoid-one-atomic-in-tcp_wfree.patch
+++ /dev/null
@@ -1,38 +0,0 @@
-From a9b204d1564702b704ad6fe74f10a102c7b87ba3 Mon Sep 17 00:00:00 2001
-From: Eric Dumazet <edumazet@google.com>
-Date: Sat, 3 Dec 2016 11:14:53 -0800
-Subject: [PATCH 04/10] tcp: tsq: avoid one atomic in tcp_wfree()
-
-Under high load, tcp_wfree() has an atomic operation trying
-to schedule a tasklet over and over.
-
-We can schedule it only if our per cpu list was empty.
-
-Signed-off-by: Eric Dumazet <edumazet@google.com>
-Signed-off-by: David S. Miller <davem@davemloft.net>
----
- net/ipv4/tcp_output.c | 5 ++++-
- 1 file changed, 4 insertions(+), 1 deletion(-)
-
---- a/net/ipv4/tcp_output.c
-+++ b/net/ipv4/tcp_output.c
-@@ -885,6 +885,7 @@ void tcp_wfree(struct sk_buff *skb)
- 
- 	for (oval = READ_ONCE(tp->tsq_flags);; oval = nval) {
- 		struct tsq_tasklet *tsq;
-+		bool empty;
- 
- 		if (!(oval & TSQF_THROTTLED) || (oval & TSQF_QUEUED))
- 			goto out;
-@@ -897,8 +898,10 @@ void tcp_wfree(struct sk_buff *skb)
- 		/* queue this socket to tasklet queue */
- 		local_irq_save(flags);
- 		tsq = this_cpu_ptr(&tsq_tasklet);
-+		empty = list_empty(&tsq->head);
- 		list_add(&tp->tsq_node, &tsq->head);
--		tasklet_schedule(&tsq->tasklet);
-+		if (empty)
-+			tasklet_schedule(&tsq->tasklet);
- 		local_irq_restore(flags);
- 		return;
- 	}