reproduce (this is a W=1 build):
        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests
        # https://github.com/krzk/linux/commit/c2c4065e701bb4eb3d2790fb163d39fe858fff2e
        git remote add krzk-github https://github.com/krzk/linux
        git fetch --no-tags krzk-github n/phy-exynos-usbdrd-fix
        git checkout c2c4065e701bb4eb3d2790fb163d39fe858fff2e
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-14.2.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=loongarch olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-14.2.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=loongarch SHELL=/bin/bash