reproduce (this is a W=1 build):
        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests
        # https://github.com/cilium/linux/commit/65332eb9360ea7f0f0bcea9de6c4b2ec7a8ca936
        git remote add cilium https://github.com/cilium/linux.git
        git fetch --no-tags cilium pr/netkit-xdp
        git checkout 65332eb9360ea7f0f0bcea9de6c4b2ec7a8ca936
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-7.5.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=arm olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-7.5.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash drivers/net/