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/jaegeuk/f2fs.git/commit/?id=5c7fd57eb036a7b736d39f31bee7e52708ec3877
        git remote add jaegeuk-f2fs https://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs.git
        git fetch --no-tags jaegeuk-f2fs dev-test
        git checkout 5c7fd57eb036a7b736d39f31bee7e52708ec3877
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.4.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=loongarch olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.4.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=loongarch SHELL=/bin/bash fs/