reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd.git/commit/?id=94de21c76e54641539032105ccd3f36801fa9d85
        git remote add jarkko-tpmdd https://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd.git
        git fetch --no-tags jarkko-tpmdd lgp-v2
        git checkout 94de21c76e54641539032105ccd3f36801fa9d85
        # 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/