--- zzzz-none-000/linux-4.9.279/drivers/mtd/ubi/vmt.c	2021-08-08 06:38:54.000000000 +0000
+++ puma7-arm-6591-750/linux-4.9.279/drivers/mtd/ubi/vmt.c	2023-02-08 10:58:13.000000000 +0000
@@ -19,6 +19,11 @@
  */
 
 /*
+ * Includes Intel Corporation's changes/modifications dated: 2017.
+ * Changed/modified portions - Copyright (c) 2017, Intel Corporation.
+ */
+
+/*
  * This file contains implementation of volume creation, deletion, updating and
  * resizing.
  */
@@ -29,7 +34,11 @@
 #include <linux/export.h>
 #include "ubi.h"
 
+#ifdef CONFIG_MTD_UBI_DEBUG
 static int self_check_volumes(struct ubi_device *ubi);
+#else
+#define self_check_volumes(ubi) 0
+#endif
 
 static ssize_t vol_attribute_show(struct device *dev,
 				  struct device_attribute *attr, char *buf);
@@ -796,6 +805,8 @@
 	return -EINVAL;
 }
 
+#ifdef CONFIG_MTD_UBI_DEBUG
+
 /**
  * self_check_volumes - check information about all volumes.
  * @ubi: UBI device description object
@@ -817,3 +828,4 @@
 
 	return err;
 }
+#endif