reproduce (this is a W=1 build):
        # https://github.com/robertosassu/linux/commit/0387b5fab703d305adb5d6fcba119dda4cf2eb05
        git remote add robertosassu https://github.com/robertosassu/linux
        git fetch --no-tags robertosassu ima-staging-v2-devel-v9
        git checkout 0387b5fab703d305adb5d6fcba119dda4cf2eb05

        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests

        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.5.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=nios2 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.5.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=nios2 SHELL=/bin/bash security/integrity/ima/