3 files changed, 24 insertions, 16 deletions

diff --git a/fs/notify/inotify/inotify.h b/fs/notify/inotify/inotify.h
index 485eef3f440..ed855ef6f07 100644
--- a/fs/notify/inotify/inotify.h
+++ b/fs/notify/inotify/inotify.h
@@ -27,6 +27,6 @@ extern int inotify_handle_event(struct fsnotify_group *group,
 				struct fsnotify_mark *inode_mark,
 				struct fsnotify_mark *vfsmount_mark,
 				u32 mask, void *data, int data_type,
-				const unsigned char *file_name);
+				const unsigned char *file_name, u32 cookie);
 
 extern const struct fsnotify_ops inotify_fsnotify_ops;
diff --git a/fs/notify/inotify/inotify_fsnotify.c b/fs/notify/inotify/inotify_fsnotify.c
index aad1a35e9af..43ab1e1a07a 100644
--- a/fs/notify/inotify/inotify_fsnotify.c
+++ b/fs/notify/inotify/inotify_fsnotify.c
@@ -53,15 +53,13 @@ static bool event_compare(struct fsnotify_event *old_fsn,
 	return false;
 }
 
-static struct fsnotify_event *inotify_merge(struct list_head *list,
-					    struct fsnotify_event *event)
+static int inotify_merge(struct list_head *list,
+			  struct fsnotify_event *event)
 {
 	struct fsnotify_event *last_event;
 
 	last_event = list_entry(list->prev, struct fsnotify_event, list);
-	if (!event_compare(last_event, event))
-		return NULL;
-	return last_event;
+	return event_compare(last_event, event);
 }
 
 int inotify_handle_event(struct fsnotify_group *group,
@@ -69,13 +67,12 @@ int inotify_handle_event(struct fsnotify_group *group,
 			 struct fsnotify_mark *inode_mark,
 			 struct fsnotify_mark *vfsmount_mark,
 			 u32 mask, void *data, int data_type,
-			 const unsigned char *file_name)
+			 const unsigned char *file_name, u32 cookie)
 {
 	struct inotify_inode_mark *i_mark;
 	struct inotify_event_info *event;
-	struct fsnotify_event *added_event;
 	struct fsnotify_event *fsn_event;
-	int ret = 0;
+	int ret;
 	int len = 0;
 	int alloc_len = sizeof(struct inotify_event_info);
 
@@ -106,22 +103,21 @@ int inotify_handle_event(struct fsnotify_group *group,
 	fsn_event = &event->fse;
 	fsnotify_init_event(fsn_event, inode, mask);
 	event->wd = i_mark->wd;
+	event->sync_cookie = cookie;
 	event->name_len = len;
 	if (len)
 		strcpy(event->name, file_name);
 
-	added_event = fsnotify_add_notify_event(group, fsn_event, inotify_merge);
-	if (added_event) {
+	ret = fsnotify_add_notify_event(group, fsn_event, inotify_merge);
+	if (ret) {
 		/* Our event wasn't used in the end. Free it. */
 		fsnotify_destroy_event(group, fsn_event);
-		if (IS_ERR(added_event))
-			ret = PTR_ERR(added_event);
 	}
 
 	if (inode_mark->mask & IN_ONESHOT)
 		fsnotify_destroy_mark(inode_mark, group);
 
-	return ret;
+	return 0;
 }
 
 static void inotify_freeing_mark(struct fsnotify_mark *fsn_mark, struct fsnotify_group *group)
diff --git a/fs/notify/inotify/inotify_user.c b/fs/notify/inotify/inotify_user.c
index 497395c8274..cc423a30a0c 100644
--- a/fs/notify/inotify/inotify_user.c
+++ b/fs/notify/inotify/inotify_user.c
@@ -57,7 +57,7 @@ static struct kmem_cache *inotify_inode_mark_cachep __read_mostly;
 
 static int zero;
 
-ctl_table inotify_table[] = {
+struct ctl_table inotify_table[] = {
 	{
 		.procname	= "max_user_instances",
 		.data		= &inotify_max_user_instances,
@@ -495,7 +495,7 @@ void inotify_ignored_and_remove_idr(struct fsnotify_mark *fsn_mark,
 
 	/* Queue ignore event for the watch */
 	inotify_handle_event(group, NULL, fsn_mark, NULL, FS_IN_IGNORED,
-			     NULL, FSNOTIFY_EVENT_NONE, NULL);
+			     NULL, FSNOTIFY_EVENT_NONE, NULL, 0);
 
 	i_mark = container_of(fsn_mark, struct inotify_inode_mark, fsn_mark);
 	/* remove this mark from the idr */
@@ -633,11 +633,23 @@ static int inotify_update_watch(struct fsnotify_group *group, struct inode *inod
 static struct fsnotify_group *inotify_new_group(unsigned int max_events)
 {
 	struct fsnotify_group *group;
+	struct inotify_event_info *oevent;
 
 	group = fsnotify_alloc_group(&inotify_fsnotify_ops);
 	if (IS_ERR(group))
 		return group;
 
+	oevent = kmalloc(sizeof(struct inotify_event_info), GFP_KERNEL);
+	if (unlikely(!oevent)) {
+		fsnotify_destroy_group(group);
+		return ERR_PTR(-ENOMEM);
+	}
+	group->overflow_event = &oevent->fse;
+	fsnotify_init_event(group->overflow_event, NULL, FS_Q_OVERFLOW);
+	oevent->wd = -1;
+	oevent->sync_cookie = 0;
+	oevent->name_len = 0;
+
 	group->max_events = max_events;
 
 	spin_lock_init(&group->inotify_data.idr_lock);