-struct memmap_attribute memmap_start_attr = __ATTR_RO(start);
-struct memmap_attribute memmap_end_attr = __ATTR_RO(end);
-struct memmap_attribute memmap_type_attr = __ATTR_RO(type);
+static struct memmap_attribute memmap_start_attr = __ATTR_RO(start);
+static struct memmap_attribute memmap_end_attr = __ATTR_RO(end);
+static struct memmap_attribute memmap_type_attr = __ATTR_RO(type);