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/20241122225958.1775625-2-song@kernel.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 fs/notify/fanotify/ fs/xfs/