reproduce (this is a W=1 build):
        # https://github.com/norov/linux/commit/a5726454470c6c99d404038eb519dda7dac6c9b3
        git remote add norov https://github.com/norov/linux
        git fetch --no-tags norov bitmap-for-next
        git checkout a5726454470c6c99d404038eb519dda7dac6c9b3

        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