--- zzzz-none-000/linux-4.4.271/fs/pstore/platform.c	2021-06-03 06:22:09.000000000 +0000
+++ hawkeye-5590-750/linux-4.4.271/fs/pstore/platform.c	2023-04-19 10:22:30.000000000 +0000
@@ -509,6 +509,13 @@
 }
 EXPORT_SYMBOL_GPL(pstore_unregister);
 
+ssize_t pstore_copy(enum pstore_type_id type, u64 id, void **buf)
+{
+	if (!psinfo->copy)
+		return -EOPNOTSUPP;
+	return psinfo->copy(type, id, buf, psinfo);
+}
+
 /*
  * Read all the records from the persistent store. Create
  * files in our filesystem.  Don't warn about -EEXIST errors