fsnotify: remove pointless NULL initializers

We usually rely on the fact that struct members not specified in the
initializer are set to NULL.  So do that with fsnotify function pointers
as well.

Signed-off-by: Jan Kara <jack@suse.cz>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Eric Paris <eparis@parisplace.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

fs/notify/dnotify/dnotify.c

@@ -138,9 +138,6 @@ static void dnotify_free_mark(struct fsnotify_mark *fsn_mark)
 
 static struct fsnotify_ops dnotify_fsnotify_ops = {
 	.handle_event = dnotify_handle_event,
-	.free_group_priv = NULL,
-	.freeing_mark = NULL,
-	.free_event = NULL,
 };
 
 /*

fs/notify/fanotify/fanotify.c

@@ -230,5 +230,4 @@ const struct fsnotify_ops fanotify_fsnotify_ops = {
 	.handle_event = fanotify_handle_event,
 	.free_group_priv = fanotify_free_group_priv,
 	.free_event = fanotify_free_event,
-	.freeing_mark = NULL,
 };

kernel/audit_tree.c

@@ -936,8 +936,6 @@ static void audit_tree_freeing_mark(struct fsnotify_mark *entry, struct fsnotify
 
 static const struct fsnotify_ops audit_tree_ops = {
 	.handle_event = audit_tree_handle_event,
-	.free_group_priv = NULL,
-	.free_event = NULL,
 	.freeing_mark = audit_tree_freeing_mark,
 };
 

kernel/audit_watch.c

@@ -505,9 +505,6 @@ static int audit_watch_handle_event(struct fsnotify_group *group,
 
 static const struct fsnotify_ops audit_watch_fsnotify_ops = {
 	.handle_event = 	audit_watch_handle_event,
-	.free_group_priv = 	NULL,
-	.freeing_mark = 	NULL,
-	.free_event = 		NULL,
 };
 
 static int __init audit_watch_init(void)