reproduce (this is a W=1 build):
        git checkout bf2602a3cb2381fb1a04bf1c39a290518d2538d1
        b4 shazam https://lore.kernel.org/r/20250924-b4-asi-page-alloc-v1-13-2d861768041f@google.com
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=x86_64 olddefconfig
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash mm/