reproduce (this is a W=1 build):
        # https://github.com/rgushchin/linux/commit/f8f699c3c785a375e31b42825752cba88f18e1d8
        git remote add rgushchin https://github.com/rgushchin/linux.git
        git fetch --no-tags rgushchin bpfoom.4.rebased
        git checkout f8f699c3c785a375e31b42825752cba88f18e1d8

        # 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