reproduce (this is a W=1 build):
        # https://github.com/robertosassu/linux/commit/255b2931b1b6cbe340c9ca968872f9d4fc7e4891
        git remote add robertosassu https://github.com/robertosassu/linux
        git fetch --no-tags robertosassu ima-evm-lsms-v9-devel-v2
        git checkout 255b2931b1b6cbe340c9ca968872f9d4fc7e4891
        # 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 security/integrity/ima/