reproduce (this is a W=1 build):
        # https://github.com/intel-lab-lkp/linux/commit/e8494bc5b81ab087f8fda3da91fb0349f6e08b83
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review odion-efficios-com/rseq-uapi-add-rseq-operation-definitions/20260828-113339
        git checkout e8494bc5b81ab087f8fda3da91fb0349f6e08b83

        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=$HOME/0day COMPILER=gcc-16.1.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=openrisc olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-16.1.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=openrisc SHELL=/bin/bash kernel/