[PATCH] new helper - inotify_evict_watch()

Kicks the watch out without dropping it.  Called under ->inotify_mutex
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/inotify.c

@@ -701,6 +701,14 @@ s32 inotify_clone_watch(struct inotify_watch *old, struct inotify_watch *new)
 	return ret;
 }
 
+void inotify_evict_watch(struct inotify_watch *watch)
+{
+	get_inotify_watch(watch);
+	mutex_lock(&watch->ih->mutex);
+	inotify_remove_watch_locked(watch->ih, watch);
+	mutex_unlock(&watch->ih->mutex);
+}
+
 /**
  * inotify_rm_wd - remove a watch from an inotify instance
  * @ih: inotify handle

include/linux/inotify.h

@@ -121,6 +121,7 @@ extern __s32 inotify_find_update_watch(struct inotify_handle *, struct inode *,
 extern __s32 inotify_add_watch(struct inotify_handle *, struct inotify_watch *,
 			       struct inode *, __u32);
 extern __s32 inotify_clone_watch(struct inotify_watch *, struct inotify_watch *);
+extern void inotify_evict_watch(struct inotify_watch *);
 extern int inotify_rm_watch(struct inotify_handle *, struct inotify_watch *);
 extern int inotify_rm_wd(struct inotify_handle *, __u32);
 extern void inotify_remove_watch_locked(struct inotify_handle *,