reproduce (this is a W=1 build):
        # https://github.com/rgushchin/linux/commit/b85abf2b8f53a5a54b8d13de4310b18bcd71067e
        git remote add rgushchin https://github.com/rgushchin/linux.git
        git fetch --no-tags rgushchin bpfoom.2.6
        git checkout b85abf2b8f53a5a54b8d13de4310b18bcd71067e

        # 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/