reproduce (this is a W=1 build):
        git checkout 8f0b4cce4481fb22653697cced8d0d04027cb1e8
        b4 shazam https://lore.kernel.org/r/20260130132857.13124-8-ilpo.jarvinen@linux.intel.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=$HOME/0day COMPILER=gcc-8.5.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=parisc olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-8.5.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=parisc SHELL=/bin/bash drivers/tty/serial/8250/