[openwrt/openwrt] kernel: backport the dev_set_threaded export to 5.10

[LEDE Commits]

nbd pushed a commit to openwrt/openwrt.git, branch master:
https://git.openwrt.org/8327e0fb72f0de674150431f363fdfa6f3431b9c

commit 8327e0fb72f0de674150431f363fdfa6f3431b9c
Author: Felix Fietkau <nbd at nbd.name>
AuthorDate: Sat Dec 10 17:36:07 2022 +0100

    kernel: backport the dev_set_threaded export to 5.10
    
    Fixes mt76 build error
    
    Signed-off-by: Felix Fietkau <nbd at nbd.name>
---
 ...-v5.12-net-export-dev_set_threaded-symbol.patch | 24 ++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/target/linux/generic/backport-5.10/605-v5.12-net-export-dev_set_threaded-symbol.patch b/target/linux/generic/backport-5.10/605-v5.12-net-export-dev_set_threaded-symbol.patch
new file mode 100644
index 0000000000..2846679c6f
--- /dev/null
+++ b/target/linux/generic/backport-5.10/605-v5.12-net-export-dev_set_threaded-symbol.patch
@@ -0,0 +1,24 @@
+From: Lorenzo Bianconi <lorenzo at kernel.org>
+Date: Sun, 14 Mar 2021 15:49:19 +0100
+Subject: [PATCH] net: export dev_set_threaded symbol
+
+For wireless devices (e.g. mt76 driver) multiple net_devices belongs to
+the same wireless phy and the napi object is registered in a dummy
+netdevice related to the wireless phy.
+Export dev_set_threaded in order to be reused in device drivers enabling
+threaded NAPI.
+
+Signed-off-by: Lorenzo Bianconi <lorenzo at kernel.org>
+Signed-off-by: David S. Miller <davem at davemloft.net>
+---
+
+--- a/net/core/dev.c
++++ b/net/core/dev.c
+@@ -6819,6 +6819,7 @@ int dev_set_threaded(struct net_device *
+ 
+ 	return err;
+ }
++EXPORT_SYMBOL(dev_set_threaded);
+ 
+ void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
+ 		    int (*poll)(struct napi_struct *, int), int weight)