kzalloc() conversion in ipc/

@@ -946,10 +946,9 @@ static inline int get_undo_list(struct s
 	undo_list = current->sysvsem.undo_list;
 	if (!undo_list) {
 		size = sizeof(struct sem_undo_list);
-		undo_list = (struct sem_undo_list *) kmalloc(size, GFP_KERNEL);
+		undo_list = kzalloc(size, GFP_KERNEL);
 		if (undo_list == NULL)
 			return -ENOMEM;
-		memset(undo_list, 0, size);
 		spin_lock_init(&undo_list->lock);
 		atomic_set(&undo_list->refcnt, 1);
 		current->sysvsem.undo_list = undo_list;