reproduce (this is a W=1 build):
        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests
        git remote add arm-perf https://git.kernel.org/pub/scm/linux/kernel/git/will/linux.git
        git fetch arm-perf for-next/perf
        git checkout arm-perf/for-next/perf
        b4 shazam https://lore.kernel.org/r/20250110130756.333265-1-east.moutain.yang@gmail.com
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-19 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=x86_64 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-19 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/iommu/amd/