[PATCH] CPT: core changes to allow checkpointing inotify interface
1. Cosmetic changes to export nessecary structs and variables
(time to start to think about moving those cpt bits to core to avoid
pollution. cpt interface could be ugly, but it is _one_ interface)
2. There is one essential change: each watchpoint refers to dentry/mnt.
The drawback: it means fs umount is blocked while some directory
on it is watched. With current uses of inotify it is not a problem.