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>
(cherry picked from commit 3a14580411adfb75f9a44eded9f41245b9e44606)

1 files changed, 0 insertions, 125 deletions

diff --git a/target/linux/generic/backport-5.4/080-wireguard-0131-wireguard-peer-allocate-in-kmem_cache.patch b/target/linux/generic/backport-5.4/080-wireguard-0131-wireguard-peer-allocate-in-kmem_cache.patch
deleted file mode 100644
index 32ae327037..0000000000
--- a/target/linux/generic/backport-5.4/080-wireguard-0131-wireguard-peer-allocate-in-kmem_cache.patch
+++ /dev/null
@@ -1,125 +0,0 @@
-From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
-From: "Jason A. Donenfeld" <Jason@zx2c4.com>
-Date: Fri, 4 Jun 2021 17:17:34 +0200
-Subject: [PATCH] wireguard: peer: allocate in kmem_cache
-
-commit a4e9f8e3287c9eb6bf70df982870980dd3341863 upstream.
-
-With deployments having upwards of 600k peers now, this somewhat heavy
-structure could benefit from more fine-grained allocations.
-Specifically, instead of using a 2048-byte slab for a 1544-byte object,
-we can now use 1544-byte objects directly, thus saving almost 25%
-per-peer, or with 600k peers, that's a savings of 303 MiB. This also
-makes wireguard's memory usage more transparent in tools like slabtop
-and /proc/slabinfo.
-
-Fixes: 8b5553ace83c ("wireguard: queueing: get rid of per-peer ring buffers")
-Suggested-by: Arnd Bergmann <arnd@arndb.de>
-Suggested-by: Matthew Wilcox <willy@infradead.org>
-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/main.c |  7 +++++++
- drivers/net/wireguard/peer.c | 21 +++++++++++++++++----
- drivers/net/wireguard/peer.h |  3 +++
- 3 files changed, 27 insertions(+), 4 deletions(-)
-
---- a/drivers/net/wireguard/main.c
-+++ b/drivers/net/wireguard/main.c
-@@ -28,6 +28,10 @@ static int __init mod_init(void)
- #endif
- 	wg_noise_init();
- 
-+	ret = wg_peer_init();
-+	if (ret < 0)
-+		goto err_peer;
-+
- 	ret = wg_device_init();
- 	if (ret < 0)
- 		goto err_device;
-@@ -44,6 +48,8 @@ static int __init mod_init(void)
- err_netlink:
- 	wg_device_uninit();
- err_device:
-+	wg_peer_uninit();
-+err_peer:
- 	return ret;
- }
- 
-@@ -51,6 +57,7 @@ static void __exit mod_exit(void)
- {
- 	wg_genetlink_uninit();
- 	wg_device_uninit();
-+	wg_peer_uninit();
- }
- 
- module_init(mod_init);
---- a/drivers/net/wireguard/peer.c
-+++ b/drivers/net/wireguard/peer.c
-@@ -15,6 +15,7 @@
- #include <linux/rcupdate.h>
- #include <linux/list.h>
- 
-+static struct kmem_cache *peer_cache;
- static atomic64_t peer_counter = ATOMIC64_INIT(0);
- 
- struct wg_peer *wg_peer_create(struct wg_device *wg,
-@@ -29,10 +30,10 @@ struct wg_peer *wg_peer_create(struct wg
- 	if (wg->num_peers >= MAX_PEERS_PER_DEVICE)
- 		return ERR_PTR(ret);
- 
--	peer = kzalloc(sizeof(*peer), GFP_KERNEL);
-+	peer = kmem_cache_zalloc(peer_cache, GFP_KERNEL);
- 	if (unlikely(!peer))
- 		return ERR_PTR(ret);
--	if (dst_cache_init(&peer->endpoint_cache, GFP_KERNEL))
-+	if (unlikely(dst_cache_init(&peer->endpoint_cache, GFP_KERNEL)))
- 		goto err;
- 
- 	peer->device = wg;
-@@ -64,7 +65,7 @@ struct wg_peer *wg_peer_create(struct wg
- 	return peer;
- 
- err:
--	kfree(peer);
-+	kmem_cache_free(peer_cache, peer);
- 	return ERR_PTR(ret);
- }
- 
-@@ -193,7 +194,8 @@ static void rcu_release(struct rcu_head
- 	/* The final zeroing takes care of clearing any remaining handshake key
- 	 * material and other potentially sensitive information.
- 	 */
--	kzfree(peer);
-+	memzero_explicit(peer, sizeof(*peer));
-+	kmem_cache_free(peer_cache, peer);
- }
- 
- static void kref_release(struct kref *refcount)
-@@ -225,3 +227,14 @@ void wg_peer_put(struct wg_peer *peer)
- 		return;
- 	kref_put(&peer->refcount, kref_release);
- }
-+
-+int __init wg_peer_init(void)
-+{
-+	peer_cache = KMEM_CACHE(wg_peer, 0);
-+	return peer_cache ? 0 : -ENOMEM;
-+}
-+
-+void wg_peer_uninit(void)
-+{
-+	kmem_cache_destroy(peer_cache);
-+}
---- a/drivers/net/wireguard/peer.h
-+++ b/drivers/net/wireguard/peer.h
-@@ -80,4 +80,7 @@ void wg_peer_put(struct wg_peer *peer);
- void wg_peer_remove(struct wg_peer *peer);
- void wg_peer_remove_all(struct wg_device *wg);
- 
-+int wg_peer_init(void);
-+void wg_peer_uninit(void);
-+
- #endif /* _WG_PEER_H */