reproduce (this is a W=1 build):
        # https://github.com/rgushchin/linux/commit/87f4eb904747c1edafa64353f98883c560d750cc
        git remote add rgushchin https://github.com/rgushchin/linux.git
        git fetch --no-tags rgushchin bpfoom.3.2
        git checkout 87f4eb904747c1edafa64353f98883c560d750cc

        # 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 mm/