reproduce (this is a W=1 build):
        # https://github.com/bytedance/kernel/commit/9cffac2e6f2df386d7cf4c2cf90d5fe2c1d6b793
        git remote add bytedance https://github.com/bytedance/kernel.git
        git fetch --no-tags bytedance 5.15-velinux
        git checkout 9cffac2e6f2df386d7cf4c2cf90d5fe2c1d6b793
        # clang-22 might not be officially released. Try a lower version if installation fails.
        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=$HOME/0day COMPILER=clang-22 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=x86_64 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-22 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash mm/