reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux.git/commit/?id=6ca67552105bac78ffe5e3c4621c94df665291d1
        git remote add axboe https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux.git
        git fetch --no-tags axboe rw_iter
        git checkout 6ca67552105bac78ffe5e3c4621c94df665291d1

        # install um cross compiling tool for clang build
        # apt-get install binutils-um-linux-gnu
        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=$HOME/0day COMPILER=clang-19 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=um olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-19 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=um SHELL=/bin/bash drivers/gpu/drm/msm/ drivers/net/wireless/ath/ath12k/ drivers/net/wireless/intel/iwlegacy/ drivers/net/wireless/intel/iwlwifi/ drivers/net/wireless/mediatek/mt76/mt7915/ drivers/net/wireless/mediatek/mt76/mt7996/