reproduce (this is a W=1 build):
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch linux-review laixiangwu/serial-sc16is7xx-Fix-clock-leak-on-invalid-clock-frequency/20261030-165507
        git checkout linux-review/laixiangwu/serial-sc16is7xx-Fix-clock-leak-on-invalid-clock-frequency/20261030-165507
        b4 shazam https://lore.kernel.org/r/20261113103855.2144-1-laixiangwu@cmss.chinamobile.com

        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=$HOME/0day COMPILER=gcc-11.5.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=nios2 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.5.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=nios2 SHELL=/bin/bash drivers/tty/serial/