reproduce (this is a W=1 build):
        # https://github.com/krzk/linux/commit/82aff4b129f138d605adcb618c42f9f8bf851002
        git remote add krzk-github https://github.com/krzk/linux
        git fetch --no-tags krzk-github b4/asoc-wsa88xx-version
        git checkout 82aff4b129f138d605adcb618c42f9f8bf851002
        # 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