reproduce (this is a W=1 build):
        git remote add bpf https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git
        git fetch bpf master
        git checkout bpf/master
        b4 shazam https://lore.kernel.org/r/20251022125209.2649287-2-maciej.fijalkowski@intel.com

        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests

        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-10.5.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=arm olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-10.5.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash fs/