reproduce (this is a W=1 build):
        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests
        # clang-22 might not be officially released. Try a lower version if installation fails.
        # https://github.com/ceph/ceph-client/commit/e362128c76ee58396cd3e9e0d3dc74727d5dcb36
        git remote add ceph-client https://github.com/ceph/ceph-client.git
        git fetch --no-tags ceph-client tls-tracing-only
        git checkout e362128c76ee58396cd3e9e0d3dc74727d5dcb36
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-22 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=hexagon olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-22 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash lib/rtlog/