[PATCH 3/6] fsnotify: Create function to remove event from notification list

[Jan Kara <jack@suse.cz>]

Create function to remove event from the notification list. Later it will
be used from more places.

Signed-off-by: Jan Kara <jack@suse.cz>
---
 fs/notify/notification.c         | 20 +++++++++++++-------
 include/linux/fsnotify_backend.h |  3 +++
 2 files changed, 16 insertions(+), 7 deletions(-)

diff --git a/fs/notify/notification.c b/fs/notify/notification.c
index 3c3e36745f59..2195a5cf745a 100644
--- a/fs/notify/notification.c
+++ b/fs/notify/notification.c
@@ -141,6 +141,18 @@ int fsnotify_add_event(struct fsnotify_group *group,
 	return ret;
 }
 
+void fsnotify_remove_queued_event(struct fsnotify_group *group,
+				  struct fsnotify_event *event)
+{
+	assert_spin_locked(&group->notification_lock);
+	/*
+	 * We need to init list head for the case of overflow event so that
+	 * check in fsnotify_add_event() works
+	 */
+	list_del_init(&event->list);
+	group->q_len--;
+}
+
 /*
  * Remove and return the first event from the notification list.  It is the
  * responsibility of the caller to destroy the obtained event
@@ -155,13 +167,7 @@ struct fsnotify_event *fsnotify_remove_first_event(struct fsnotify_group *group)
 
 	event = list_first_entry(&group->notification_list,
 				 struct fsnotify_event, list);
-	/*
-	 * We need to init list head for the case of overflow event so that
-	 * check in fsnotify_add_event() works
-	 */
-	list_del_init(&event->list);
-	group->q_len--;
-
+	fsnotify_remove_queued_event(group, event);
 	return event;
 }
 
diff --git a/include/linux/fsnotify_backend.h b/include/linux/fsnotify_backend.h
index 7639774e7475..cddf839bac96 100644
--- a/include/linux/fsnotify_backend.h
+++ b/include/linux/fsnotify_backend.h
@@ -416,6 +416,9 @@ extern bool fsnotify_notify_queue_is_empty(struct fsnotify_group *group);
 extern struct fsnotify_event *fsnotify_peek_first_event(struct fsnotify_group *group);
 /* return AND dequeue the first event on the notification queue */
 extern struct fsnotify_event *fsnotify_remove_first_event(struct fsnotify_group *group);
+/* Remove event queued in the notification list */
+extern void fsnotify_remove_queued_event(struct fsnotify_group *group,
+					 struct fsnotify_event *event);
 
 /* functions used to manipulate the marks attached to inodes */
 
-- 
2.16.4