fsnotify: Move ->free_mark callback to fsnotify_ops

Pointer to ->free_mark callback unnecessarily occupies one long in each
fsnotify_mark although they are the same for all marks from one
notification group. Move the callback pointer to fsnotify_ops.

Reviewed-by: Miklos Szeredi <mszeredi@redhat.com>
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
diff --git a/kernel/audit_fsnotify.c b/kernel/audit_fsnotify.c
index 2522cea..4aad0a4 100644
--- a/kernel/audit_fsnotify.c
+++ b/kernel/audit_fsnotify.c
@@ -103,8 +103,7 @@ struct audit_fsnotify_mark *audit_alloc_mark(struct audit_krule *krule, char *pa
 		goto out;
 	}
 
-	fsnotify_init_mark(&audit_mark->mark, audit_fsnotify_group,
-			   audit_fsnotify_free_mark);
+	fsnotify_init_mark(&audit_mark->mark, audit_fsnotify_group);
 	audit_mark->mark.mask = AUDIT_FS_EVENTS;
 	audit_mark->path = pathname;
 	audit_update_mark(audit_mark, dentry->d_inode);
@@ -203,6 +202,7 @@ static int audit_mark_handle_event(struct fsnotify_group *group,
 
 static const struct fsnotify_ops audit_mark_fsnotify_ops = {
 	.handle_event =	audit_mark_handle_event,
+	.free_mark = audit_fsnotify_free_mark,
 };
 
 static int __init audit_fsnotify_init(void)