reproduce (this is a W=1 build):
        git remote add arm git://git.armlinux.org.uk/~rmk/linux-arm.git
        git fetch arm for-next
        git checkout arm/for-next
        b4 shazam https://lore.kernel.org/r/20260410114336.983057-1-brian.ruley@gehealthcare.com

        # install loongarch cross compiling tool for clang build
        # apt-get install binutils-loongarch-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=$HOME/0day COMPILER=clang-19 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=loongarch olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-19 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=loongarch SHELL=/bin/bash mm/