reproduce (this is a W=1 build):
        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests
        git remote add westeri-thunderbolt https://git.kernel.org/pub/scm/linux/kernel/git/westeri/thunderbolt.git
        git fetch westeri-thunderbolt next
        git checkout westeri-thunderbolt/next
        b4 shazam https://lore.kernel.org/r/26b7f215-4f83-413c-9dab-737d790053c0@web.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 drivers/thunderbolt/