reproduce (this is a W=1 build):
        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests
        # https://github.com/l1k/linux/commit/d3a669b8ded4ab05c102071648f1a737062fdab2
        git remote add l1k https://github.com/l1k/linux
        git fetch --no-tags l1k aer_reset_v1
        git checkout d3a669b8ded4ab05c102071648f1a737062fdab2
        # 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 drivers/infiniband/hw/hfi1/