reproduce (this is a W=1 build):
        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests
        git remote add xfs-linux https://git.kernel.org/pub/scm/fs/xfs/xfs-linux.git
        git fetch xfs-linux for-next
        git checkout xfs-linux/for-next
        b4 shazam https://lore.kernel.org/r/20240824034100.1163020-6-hch@lst.de
        # 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/xfs/