reproduce (this is a W=1 build):
        git remote add linux-nvme git://git.infradead.org/nvme.git
        git fetch --no-tags linux-nvme for-next
        git checkout 736f81bd474d83c6af18ebb27730479f3fd187e5

        # install mips cross compiling tool for clang build
        # apt-get install binutils-mips-linux-gnu
        # clang-23 might not be officially released. Try a lower version if installation fails.
        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=$HOME/0day COMPILER=clang-23 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=mips olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-23 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=mips SHELL=/bin/bash