reproduce (this is a W=1 build):
        # https://github.com/brauner/linux/commit/b26c6a1c1caee2608dc18803b2756df8ee9c9ecc
        git remote add brauner-github https://github.com/brauner/linux.git
        git fetch --no-tags brauner-github work.fd.prepare.scoped
        git checkout b26c6a1c1caee2608dc18803b2756df8ee9c9ecc

        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=$HOME/0day COMPILER=gcc-14.3.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=powerpc olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-14.3.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=powerpc SHELL=/bin/bash arch/powerpc/platforms/pseries/