9  * the event happened.  When inotify gets an event it will need to add that
10  * event to the group notify queue.  Since a single event might need to be on
11  * multiple group's notification queues we can't add the event directly to each
13  * has a pointer back to the original event.  Since the majority of events are
15  * event_holder into each event.  This means we have a single allocation instead
58 			    struct fsnotify_event *event)  in fsnotify_destroy_event()  argument
61 	if (!event || event == group->overflow_event)  in fsnotify_destroy_event()
64 	 * If the event is still queued, we have a problem... Do an unreliable  in fsnotify_destroy_event()
67 	 * from the list by a different CPU than the one freeing the event.  in fsnotify_destroy_event()
69 	if (!list_empty(&event->list)) {  in fsnotify_destroy_event()
71 		WARN_ON(!list_empty(&event->list));  in fsnotify_destroy_event()
74 	group->ops->free_event(event);  in fsnotify_destroy_event()
78  * Add an event to the group notification queue.  The group can later pull this
79  * event off the queue to deal with.  The function returns 0 if the event was
80  * added to the queue, 1 if the event was merged with some other queued event,
81  * 2 if the event was not queued - either the queue of events has overflown
85 		       struct fsnotify_event *event,  in fsnotify_add_event()  argument
92 	pr_debug("%s: group=%p event=%p\n", __func__, group, event);  in fsnotify_add_event()
101 	if (event == group->overflow_event ||  in fsnotify_add_event()
104 		/* Queue overflow event only if it isn't already queued */  in fsnotify_add_event()
109 		event = group->overflow_event;  in fsnotify_add_event()
114 		ret = merge(list, event);  in fsnotify_add_event()
123 	list_add_tail(&event->list, list);  in fsnotify_add_event()
132 				  struct fsnotify_event *event)  in fsnotify_remove_queued_event()  argument
136 	 * We need to init list head for the case of overflow event so that  in fsnotify_remove_queued_event()
139 	list_del_init(&event->list);  in fsnotify_remove_queued_event()
144  * Remove and return the first event from the notification list.  It is the
145  * responsibility of the caller to destroy the obtained event
149 	struct fsnotify_event *event;  in fsnotify_remove_first_event()  local
155 	event = list_first_entry(&group->notification_list,  in fsnotify_remove_first_event()
157 	fsnotify_remove_queued_event(group, event);  in fsnotify_remove_first_event()
158 	return event;  in fsnotify_remove_first_event()
162  * This will not remove the event, that must be done with
175  * event notifications.
179 	struct fsnotify_event *event;  in fsnotify_flush_notify()  local
183 		event = fsnotify_remove_first_event(group);  in fsnotify_flush_notify()
185 		fsnotify_destroy_event(group, event);  in fsnotify_flush_notify()