reproduce (this is a W=1 build):
        git remote add arm64 https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git
        git fetch arm64 for-next/core
        git checkout arm64/for-next/core
        b4 shazam https://lore.kernel.org/r/20231114153253.241262-3-bhe@redhat.com
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=x86_64 olddefconfig
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash