kernel: delete Linux 5.4 config and patches

As the upcoming release will be based on Linux 5.10 only, remove all
kernel configuration as well as patches for Linux 5.4.
There were no targets still actively using Linux 5.4.

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

1 files changed, 0 insertions, 66 deletions

diff --git a/target/linux/generic/backport-5.4/080-wireguard-0130-wireguard-use-synchronize_net-rather-than-synchroniz.patch b/target/linux/generic/backport-5.4/080-wireguard-0130-wireguard-use-synchronize_net-rather-than-synchroniz.patch
deleted file mode 100644
index 309fe36198..0000000000
--- a/target/linux/generic/backport-5.4/080-wireguard-0130-wireguard-use-synchronize_net-rather-than-synchroniz.patch
+++ /dev/null
@@ -1,66 +0,0 @@
-From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
-From: "Jason A. Donenfeld" <Jason@zx2c4.com>
-Date: Fri, 4 Jun 2021 17:17:33 +0200
-Subject: [PATCH] wireguard: use synchronize_net rather than synchronize_rcu
-
-commit 24b70eeeb4f46c09487f8155239ebfb1f875774a upstream.
-
-Many of the synchronization points are sometimes called under the rtnl
-lock, which means we should use synchronize_net rather than
-synchronize_rcu. Under the hood, this expands to using the expedited
-flavor of function in the event that rtnl is held, in order to not stall
-other concurrent changes.
-
-This fixes some very, very long delays when removing multiple peers at
-once, which would cause some operations to take several minutes.
-
-Fixes: e7096c131e51 ("net: WireGuard secure network tunnel")
-Cc: stable@vger.kernel.org
-Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
-Signed-off-by: David S. Miller <davem@davemloft.net>
-Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
----
- drivers/net/wireguard/peer.c   | 6 +++---
- drivers/net/wireguard/socket.c | 2 +-
- 2 files changed, 4 insertions(+), 4 deletions(-)
-
---- a/drivers/net/wireguard/peer.c
-+++ b/drivers/net/wireguard/peer.c
-@@ -88,7 +88,7 @@ static void peer_make_dead(struct wg_pee
- 	/* Mark as dead, so that we don't allow jumping contexts after. */
- 	WRITE_ONCE(peer->is_dead, true);
- 
--	/* The caller must now synchronize_rcu() for this to take effect. */
-+	/* The caller must now synchronize_net() for this to take effect. */
- }
- 
- static void peer_remove_after_dead(struct wg_peer *peer)
-@@ -160,7 +160,7 @@ void wg_peer_remove(struct wg_peer *peer
- 	lockdep_assert_held(&peer->device->device_update_lock);
- 
- 	peer_make_dead(peer);
--	synchronize_rcu();
-+	synchronize_net();
- 	peer_remove_after_dead(peer);
- }
- 
-@@ -178,7 +178,7 @@ void wg_peer_remove_all(struct wg_device
- 		peer_make_dead(peer);
- 		list_add_tail(&peer->peer_list, &dead_peers);
- 	}
--	synchronize_rcu();
-+	synchronize_net();
- 	list_for_each_entry_safe(peer, temp, &dead_peers, peer_list)
- 		peer_remove_after_dead(peer);
- }
---- a/drivers/net/wireguard/socket.c
-+++ b/drivers/net/wireguard/socket.c
-@@ -430,7 +430,7 @@ void wg_socket_reinit(struct wg_device *
- 	if (new4)
- 		wg->incoming_port = ntohs(inet_sk(new4)->inet_sport);
- 	mutex_unlock(&wg->socket_update_lock);
--	synchronize_rcu();
-+	synchronize_net();
- 	sock_free(old4);
- 	sock_free(old6);
- }