reproduce (this is a W=1 build):
        git checkout 82f2b0b97b36ee3fcddf0f0780a9a0825d52fec3
        b4 shazam https://lore.kernel.org/r/25c5e747-107f-4450-8eb0-11b2f0dab14d@neon.tech
        # 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 arch/x86/mm/