reproduce (this is a W=1 build):
        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests
        # https://git.kernel.org/pub/scm/linux/kernel/git/vishal/linux.git/commit/?id=82a0cdb33619455fb73bd3f54ae580e2ddc7dcb1
        git remote add vishal https://git.kernel.org/pub/scm/linux/kernel/git/vishal/linux.git
        git fetch --no-tags vishal vv/dax_abi
        git checkout 82a0cdb33619455fb73bd3f54ae580e2ddc7dcb1
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-13.2.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=microblaze olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-13.2.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=microblaze SHELL=/bin/bash lib/