Compile bpf_load of kernel

How can I compile the linux/samples/bpf/bpf_load module or other sample modules? Can I add this as kernel module? How would it look like?

define KernelPackage/bpf-load
  SUBMENU:=$(OTHER_MENU)
  TITLE:=BPF Loader
  KCONFIG:=CONFIG_BPF_LOAD
  FILES:=$(LINUX_DIR)/samples/bpf/bpf_load.ko
  AUTOLOAD:=$(call AutoLoad,50,bpf-load,1)
endef

define KernelPackage/bpf-load/description
  BPF-Loader
endef

Does not work... ^^

I just added some bpf programm from the samples as kernel module.
It compiles sucessfully. I hoped that the Makefile in the directory would be called and I get the intermediate compiling results (vm file and userspace programm)... But I can not find it. :confused: