reproduce (this is a W=1 build):
        # https://github.com/gdamjan/linux/commit/f7bddb11dc3d768f1af5f0a4eb2c6984689ab88b
        git remote add gdamjan https://github.com/gdamjan/linux
        git fetch --no-tags gdamjan v6.19/thinkpad-x9-14
        git checkout f7bddb11dc3d768f1af5f0a4eb2c6984689ab88b

        # install sparc64 cross compiling tool for clang build
        # apt-get install binutils-sparc64-linux-gnu
        # 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=$HOME/0day COMPILER=clang-22 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=sparc64 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-22 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=sparc64 SHELL=/bin/bash drivers/media/i2c/