compile for help

[yw1573]

root@8adee85ab397:~/ovpn-dco-master# make KERNEL_SRC=../linux-6.4.1
/home/xxxx/ovpn-dco-master/gen-compat-autoconf.sh /home/xxxx/ovpn-dco-master/compat-autoconf.h
make -C ../linux-6.4.1 M=/home/xxxx/ovpn-dco-master PWD=/home/xxxx/ovpn-dco-master REVISION= CONFIG_OVPN_DCO_V2=m INSTALL_MOD_DIR=updates/	modules
make[1]: Entering directory '/home/xxxx/linux-6.4.1'
  MODPOST /home/xxxx/ovpn-dco-master/Module.symvers
ERROR: modpost: "setup_udp_tunnel_sock" [/home/xxxx/ovpn-dco-master/drivers/net/ovpn-dco/ovpn-dco-v2.ko] undefined!
ERROR: modpost: "udp_tunnel_xmit_skb" [/home/xxxx/ovpn-dco-master/drivers/net/ovpn-dco/ovpn-dco-v2.ko] undefined!
ERROR: modpost: "udp_tunnel6_xmit_skb" [/home/xxxx/ovpn-dco-master/drivers/net/ovpn-dco/ovpn-dco-v2.ko] undefined!
make[2]: *** [scripts/Makefile.modpost:136: /home/xxxx/ovpn-dco-master/Module.symvers] Error 1
make[1]: *** [Makefile:1978: modpost] Error 2
make[1]: Leaving directory '/home/xxxx/linux-6.4.1'
make: *** [Makefile:59: all] Error 2

[yw1573]

#38