--- zzzz-none-000/linux-5.15.111/drivers/mtd/ubi/vmt.c	2023-05-11 14:00:40.000000000 +0000
+++ puma7-atom-6670-761/linux-5.15.111/drivers/mtd/ubi/vmt.c	2024-02-07 10:23:08.000000000 +0000
@@ -16,7 +16,11 @@
 #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);
@@ -774,6 +778,8 @@
 	return -EINVAL;
 }
 
+#ifdef CONFIG_MTD_UBI_DEBUG
+
 /**
  * self_check_volumes - check information about all volumes.
  * @ubi: UBI device description object
@@ -795,3 +801,4 @@
 
 	return err;
 }
+#endif