reproduce (this is a W=1 build):
        # https://github.com/davidhildenbrand/linux/commit/68d25ad59a06bda87b5dc92a9a6e6fa43034c889
        git remote add davidhildenbrand https://github.com/davidhildenbrand/linux
        git fetch --no-tags davidhildenbrand folio_walk
        git checkout 68d25ad59a06bda87b5dc92a9a6e6fa43034c889
        # 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