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-stable.git/commit/?id=4c646eceff35f0bfee4c67285c6963ac2db6849e
        git remote add jaegeuk-f2fs-stable https://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs-stable.git
        git fetch --no-tags jaegeuk-f2fs-stable linux-5.10.y
        git checkout 4c646eceff35f0bfee4c67285c6963ac2db6849e
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-18 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=x86_64 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-18 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash fs/