reproduce (this is a W=1 build):
        git checkout cb85ca4c0a349e246cd35161088aa3689ae5c580
        b4 shazam https://lore.kernel.org/r/20251017-qbv-fixes-v3-2-d3a42e32646a@altera.com

        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=$HOME/0day COMPILER=clang-20 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=x86_64 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-20 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash arch/x86/kvm/ drivers/net/ethernet/stmicro/stmmac/ kernel/bpf/