[PATCH] inotify (3/5): add interfaces to kernel API

Add inotify_init_watch() so caller can use inotify_watch refcounts
before calling inotify_add_watch().

Add inotify_find_watch() to find an existing watch for an (ih,inode)
pair.  This is similar to inotify_find_update_watch(), but does not
update the watch's mask if one is found.

Add inotify_rm_watch() to remove a watch via the watch pointer instead
of the watch descriptor.

Signed-off-by: Amy Griffis <amy.griffis@hp.com>
Acked-by: Robert Love <rml@novell.com>
Acked-by: John McCutchan <john@johnmccutchan.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/inotify_user.c b/fs/inotify_user.c
index 8b83c71..9e9931e 100644
--- a/fs/inotify_user.c
+++ b/fs/inotify_user.c
@@ -380,6 +380,7 @@
 
 	atomic_inc(&dev->user->inotify_watches);
 
+	inotify_init_watch(&watch->wdata);
 	ret = inotify_add_watch(dev->ih, &watch->wdata, inode, mask);
 	if (ret < 0)
 		free_inotify_user_watch(&watch->wdata);