reproduce (this is a W=1 build):
        # https://github.com/intel-lab-lkp/linux/commit/a89290bb17ae209a158be7be88616bce4b03e431
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Blaise-Boscaccy/crypto-pkcs7-add-flag-for-validated-trust-on-a-signed-info-block/20260502-054022
        git checkout a89290bb17ae209a158be7be88616bce4b03e431

        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests
        # apt-get install llvm-dev

        # save the config file
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-14.2.0 ~/lkp-tests/kbuild/make.cross W=1 ARCH=s390 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-14.2.0 ~/lkp-tests/kbuild/make.cross W=1 ARCH=s390 
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-14.2.0 ~/lkp-tests/kbuild/make.cross W=1 headers_install
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-14.2.0 ~/lkp-tests/kbuild/make.cross W=1 -C tools/testing/selftests