reproduce (this is a W=1 build):
        # https://github.com/norov/linux/commit/3a8c8f12c46acd1541dbea31afaa96e8c4bf8177
        git remote add norov https://github.com/norov/linux
        git fetch --no-tags norov total_cpus
        git checkout 3a8c8f12c46acd1541dbea31afaa96e8c4bf8177

        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=$HOME/0day COMPILER=gcc-15.1.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=sparc olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-15.1.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=sparc SHELL=/bin/bash kernel/