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, 177 deletions

diff --git a/target/linux/generic/backport-5.4/602-v5.12-net-add-sysfs-attribute-to-control-napi-threaded-mod.patch b/target/linux/generic/backport-5.4/602-v5.12-net-add-sysfs-attribute-to-control-napi-threaded-mod.patch
deleted file mode 100644
index bdc34a15ea..0000000000
--- a/target/linux/generic/backport-5.4/602-v5.12-net-add-sysfs-attribute-to-control-napi-threaded-mod.patch
+++ /dev/null
@@ -1,177 +0,0 @@
-From: Wei Wang <weiwan@google.com>
-Date: Mon, 8 Feb 2021 11:34:10 -0800
-Subject: [PATCH] net: add sysfs attribute to control napi threaded mode
-
-This patch adds a new sysfs attribute to the network device class.
-Said attribute provides a per-device control to enable/disable the
-threaded mode for all the napi instances of the given network device,
-without the need for a device up/down.
-User sets it to 1 or 0 to enable or disable threaded mode.
-Note: when switching between threaded and the current softirq based mode
-for a napi instance, it will not immediately take effect if the napi is
-currently being polled. The mode switch will happen for the next time
-napi_schedule() is called.
-
-Co-developed-by: Paolo Abeni <pabeni@redhat.com>
-Signed-off-by: Paolo Abeni <pabeni@redhat.com>
-Co-developed-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
-Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
-Co-developed-by: Felix Fietkau <nbd@nbd.name>
-Signed-off-by: Felix Fietkau <nbd@nbd.name>
-Signed-off-by: Wei Wang <weiwan@google.com>
-Reviewed-by: Alexander Duyck <alexanderduyck@fb.com>
-Signed-off-by: David S. Miller <davem@davemloft.net>
----
-
---- a/Documentation/ABI/testing/sysfs-class-net
-+++ b/Documentation/ABI/testing/sysfs-class-net
-@@ -301,3 +301,18 @@ Contact:	netdev@vger.kernel.org
- Description:
- 		32-bit unsigned integer counting the number of times the link has
- 		been down
-+
-+What:		/sys/class/net/<iface>/threaded
-+Date:		Jan 2021
-+KernelVersion:	5.12
-+Contact:	netdev@vger.kernel.org
-+Description:
-+		Boolean value to control the threaded mode per device. User could
-+		set this value to enable/disable threaded mode for all napi
-+		belonging to this device, without the need to do device up/down.
-+
-+		Possible values:
-+		== ==================================
-+		0  threaded mode disabled for this dev
-+		1  threaded mode enabled for this dev
-+		== ==================================
---- a/include/linux/netdevice.h
-+++ b/include/linux/netdevice.h
-@@ -498,6 +498,8 @@ static inline bool napi_complete(struct
-  */
- bool napi_hash_del(struct napi_struct *napi);
- 
-+int dev_set_threaded(struct net_device *dev, bool threaded);
-+
- /**
-  *	napi_disable - prevent NAPI from scheduling
-  *	@n: NAPI context
---- a/net/core/dev.c
-+++ b/net/core/dev.c
-@@ -3914,8 +3914,9 @@ static inline void ____napi_schedule(str
- 
- 	if (test_bit(NAPI_STATE_THREADED, &napi->state)) {
- 		/* Paired with smp_mb__before_atomic() in
--		 * napi_enable(). Use READ_ONCE() to guarantee
--		 * a complete read on napi->thread. Only call
-+		 * napi_enable()/dev_set_threaded().
-+		 * Use READ_ONCE() to guarantee a complete
-+		 * read on napi->thread. Only call
- 		 * wake_up_process() when it's not NULL.
- 		 */
- 		thread = READ_ONCE(napi->thread);
-@@ -6293,6 +6294,49 @@ static void init_gro_hash(struct napi_st
- 	napi->gro_bitmask = 0;
- }
- 
-+int dev_set_threaded(struct net_device *dev, bool threaded)
-+{
-+	struct napi_struct *napi;
-+	int err = 0;
-+
-+	if (dev->threaded == threaded)
-+		return 0;
-+
-+	if (threaded) {
-+		list_for_each_entry(napi, &dev->napi_list, dev_list) {
-+			if (!napi->thread) {
-+				err = napi_kthread_create(napi);
-+				if (err) {
-+					threaded = false;
-+					break;
-+				}
-+			}
-+		}
-+	}
-+
-+	dev->threaded = threaded;
-+
-+	/* Make sure kthread is created before THREADED bit
-+	 * is set.
-+	 */
-+	smp_mb__before_atomic();
-+
-+	/* Setting/unsetting threaded mode on a napi might not immediately
-+	 * take effect, if the current napi instance is actively being
-+	 * polled. In this case, the switch between threaded mode and
-+	 * softirq mode will happen in the next round of napi_schedule().
-+	 * This should not cause hiccups/stalls to the live traffic.
-+	 */
-+	list_for_each_entry(napi, &dev->napi_list, dev_list) {
-+		if (threaded)
-+			set_bit(NAPI_STATE_THREADED, &napi->state);
-+		else
-+			clear_bit(NAPI_STATE_THREADED, &napi->state);
-+	}
-+
-+	return err;
-+}
-+
- void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
- 		    int (*poll)(struct napi_struct *, int), int weight)
- {
---- a/net/core/net-sysfs.c
-+++ b/net/core/net-sysfs.c
-@@ -557,6 +557,45 @@ static ssize_t phys_switch_id_show(struc
- }
- static DEVICE_ATTR_RO(phys_switch_id);
- 
-+static ssize_t threaded_show(struct device *dev,
-+			     struct device_attribute *attr, char *buf)
-+{
-+	struct net_device *netdev = to_net_dev(dev);
-+	ssize_t ret = -EINVAL;
-+
-+	if (!rtnl_trylock())
-+		return restart_syscall();
-+
-+	if (dev_isalive(netdev))
-+		ret = sprintf(buf, fmt_dec, netdev->threaded);
-+
-+	rtnl_unlock();
-+	return ret;
-+}
-+
-+static int modify_napi_threaded(struct net_device *dev, unsigned long val)
-+{
-+	int ret;
-+
-+	if (list_empty(&dev->napi_list))
-+		return -EOPNOTSUPP;
-+
-+	if (val != 0 && val != 1)
-+		return -EOPNOTSUPP;
-+
-+	ret = dev_set_threaded(dev, val);
-+
-+	return ret;
-+}
-+
-+static ssize_t threaded_store(struct device *dev,
-+			      struct device_attribute *attr,
-+			      const char *buf, size_t len)
-+{
-+	return netdev_store(dev, attr, buf, len, modify_napi_threaded);
-+}
-+static DEVICE_ATTR_RW(threaded);
-+
- static struct attribute *net_class_attrs[] __ro_after_init = {
- 	&dev_attr_netdev_group.attr,
- 	&dev_attr_type.attr,
-@@ -587,6 +626,7 @@ static struct attribute *net_class_attrs
- 	&dev_attr_proto_down.attr,
- 	&dev_attr_carrier_up_count.attr,
- 	&dev_attr_carrier_down_count.attr,
-+	&dev_attr_threaded.attr,
- 	NULL,
- };
- ATTRIBUTE_GROUPS(net_class);