reproduce (this is a W=1 build):
        git checkout 1e391b34f6aa043c7afa40a2103163a0ef06d179
        b4 shazam https://lore.kernel.org/r/20240806-samsung-tty-cleanup-v1-2-a68d3abf31fe@linaro.org
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=i386 olddefconfig
        make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash drivers/tty/serial/