reproduce (this is a W=1 build):
        # https://github.com/jimc/linux/commit/bc5ee628d6230f6c491f1b868aa7a201bf2ee513
        git remote add jimc https://github.com/jimc/linux.git
        git fetch --no-tags jimc ksyms-tune
        git checkout bc5ee628d6230f6c491f1b868aa7a201bf2ee513

        # 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