reproduce (this is a W=1 build):
        # https://github.com/intel-lab-lkp/linux/commit/bfe7d05f0badc6b80147a4856394d1824a853f27
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Jori-Koolstra/vfs-syscalls-add-mkdirat_fd/20260403-081814
        git checkout bfe7d05f0badc6b80147a4856394d1824a853f27

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

        # save the config file
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-14.2.0 ~/lkp-tests/kbuild/make.cross W=1 ARCH=powerpc olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-14.2.0 ~/lkp-tests/kbuild/make.cross W=1 headers_install
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-14.2.0 ~/lkp-tests/kbuild/make.cross W=1 -C tools/thermal/lib
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-14.2.0 ~/lkp-tests/kbuild/make.cross W=1 -C tools/lib/api
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-14.2.0 ~/lkp-tests/kbuild/make.cross W=1 tools/all