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, 53 deletions

diff --git a/target/linux/generic/backport-5.4/604-v5.12-net-fix-hangup-on-napi_disable-for-threaded-napi.patch b/target/linux/generic/backport-5.4/604-v5.12-net-fix-hangup-on-napi_disable-for-threaded-napi.patch
deleted file mode 100644
index 5c48fdf5c1..0000000000
--- a/target/linux/generic/backport-5.4/604-v5.12-net-fix-hangup-on-napi_disable-for-threaded-napi.patch
+++ /dev/null
@@ -1,53 +0,0 @@
-From: Paolo Abeni <pabeni@redhat.com>
-Date: Fri, 9 Apr 2021 17:24:17 +0200
-Subject: [PATCH] net: fix hangup on napi_disable for threaded napi
-
-napi_disable() is subject to an hangup, when the threaded
-mode is enabled and the napi is under heavy traffic.
-
-If the relevant napi has been scheduled and the napi_disable()
-kicks in before the next napi_threaded_wait() completes - so
-that the latter quits due to the napi_disable_pending() condition,
-the existing code leaves the NAPI_STATE_SCHED bit set and the
-napi_disable() loop waiting for such bit will hang.
-
-This patch addresses the issue by dropping the NAPI_STATE_DISABLE
-bit test in napi_thread_wait(). The later napi_threaded_poll()
-iteration will take care of clearing the NAPI_STATE_SCHED.
-
-This also addresses a related problem reported by Jakub:
-before this patch a napi_disable()/napi_enable() pair killed
-the napi thread, effectively disabling the threaded mode.
-On the patched kernel napi_disable() simply stops scheduling
-the relevant thread.
-
-v1 -> v2:
-  - let the main napi_thread_poll() loop clear the SCHED bit
-
-Reported-by: Jakub Kicinski <kuba@kernel.org>
-Fixes: 29863d41bb6e ("net: implement threaded-able napi poll loop support")
-Signed-off-by: Paolo Abeni <pabeni@redhat.com>
-Reviewed-by: Eric Dumazet <edumazet@google.com>
-Link: https://lore.kernel.org/r/883923fa22745a9589e8610962b7dc59df09fb1f.1617981844.git.pabeni@redhat.com
-Signed-off-by: Jakub Kicinski <kuba@kernel.org>
----
-
---- a/net/core/dev.c
-+++ b/net/core/dev.c
-@@ -6521,7 +6521,7 @@ static int napi_thread_wait(struct napi_
- 
- 	set_current_state(TASK_INTERRUPTIBLE);
- 
--	while (!kthread_should_stop() && !napi_disable_pending(napi)) {
-+	while (!kthread_should_stop()) {
- 		/* Testing SCHED_THREADED bit here to make sure the current
- 		 * kthread owns this napi and could poll on this napi.
- 		 * Testing SCHED bit is not enough because SCHED bit might be
-@@ -6539,6 +6539,7 @@ static int napi_thread_wait(struct napi_
- 		set_current_state(TASK_INTERRUPTIBLE);
- 	}
- 	__set_current_state(TASK_RUNNING);
-+
- 	return -1;
- }
-