reproduce (this is a W=1 build):
        git remote add jack-fs https://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs.git
        git fetch jack-fs fsnotify
        git checkout jack-fs/fsnotify
        b4 shazam https://lore.kernel.org/r/1bc2855779e7ba1d80592be7d6257b43f1a91886.1721931241.git.josef@toxicpanda.com
        # 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 fs/notify/