reproduce (this is a W=1 build):
        # https://github.com/zen-kernel/zen-kernel/commit/659df19f49db49a4bef8a3f327c7e71b85962a04
        git remote add zen https://github.com/zen-kernel/zen-kernel
        git fetch --no-tags zen 7.3/prjc
        git checkout 659df19f49db49a4bef8a3f327c7e71b85962a04

        # 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=$HOME/0day COMPILER=clang-22 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=loongarch olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-22 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=loongarch SHELL=/bin/bash kernel/trace/