reproduce (this is a W=1 build):
        # https://github.com/weiny2/linux-kernel/commit/5f1c19a1fb8cb1ce084d9d55922793703fcf9af0
        git remote add weiny2 https://github.com/weiny2/linux-kernel.git
        git fetch --no-tags weiny2 fuad-mroth-2M
        git checkout 5f1c19a1fb8cb1ce084d9d55922793703fcf9af0
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=i386 olddefconfig
        make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash