reproduce (this is a W=1 build):
        git checkout 7fd2df204f342fc17d1a0bfcd474b24232fb0f32
        b4 shazam https://lore.kernel.org/r/20260505-printk_delay-v1-1-5dba51d7f17c@thegoodpenguin.co.uk

        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=$HOME/0day COMPILER=gcc-15.2.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=arc olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-15.2.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=arc SHELL=/bin/bash kernel/printk/