reproduce (this is a W=1 build):
        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests
        git remote add andi-shyti git://git.kernel.org/pub/scm/linux/kernel/git/andi.shyti/linux.git
        git fetch andi-shyti i2c/i2c-host
        git checkout andi-shyti/i2c/i2c-host
        b4 shazam https://lore.kernel.org/r/20240516181907.3468796-38-eajames@linux.ibm.com
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-18 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=i386 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-18 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=i386 SHELL=/bin/bash drivers/fsi/