115  * xenbus_watch_path - register a watch
117  * @path: path to watch
118  * @watch: watch to register
122  * Register a @watch on the given path, using the given xenbus_watch structure
125  * On success, the given @path will be saved as @watch->node, and remains the
126  * caller's to free.  On error, @watch->node will be NULL, the device will
132 		      struct xenbus_watch *watch,  in xenbus_watch_path()  argument
140 	watch->node = path;  in xenbus_watch_path()
141 	watch->will_handle = will_handle;  in xenbus_watch_path()
142 	watch->callback = callback;  in xenbus_watch_path()
144 	err = register_xenbus_watch(watch);  in xenbus_watch_path()
147 		watch->node = NULL;  in xenbus_watch_path()
148 		watch->will_handle = NULL;  in xenbus_watch_path()
149 		watch->callback = NULL;  in xenbus_watch_path()
150 		xenbus_dev_fatal(dev, err, "adding watch on %s", path);  in xenbus_watch_path()
159  * xenbus_watch_pathfmt - register a watch on a sprintf-formatted path
161  * @watch: watch to register
164  * @pathfmt: format of path to watch
166  * Register a watch on the given @path, using the given xenbus_watch
170  * as @watch->node, and becomes the caller's to kfree().
171  * On error, watch->node will be NULL, so the caller has nothing to
178 			 struct xenbus_watch *watch,  in xenbus_watch_pathfmt()  argument
194 		xenbus_dev_fatal(dev, -ENOMEM, "allocating path for watch");  in xenbus_watch_pathfmt()
197 	err = xenbus_watch_path(dev, path, watch, will_handle, callback);  in xenbus_watch_pathfmt()