diff --git a/lib/crc64.c b/lib/crc64.c
new file mode 100644
index 000000000000..03f078303bd3
--- /dev/null
+++ b/lib/crc64.c

@@ -0,0 +1,71 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Normal 64bit CRC calculation.
+ *
+ * This is a basic crc64 implementation following ECMA-182 specification,
+ * which can be found from,
+ * http://www.ecma-international.org/publications/standards/Ecma-182.htm
+ *
+ * Dr. Ross N. Williams has a great document to introduce the idea of CRC
+ * algorithm, here the CRC64 code is also inspired by the table-driven
+ * algorithm and detail example from this paper. This paper can be found
+ * from,
+ * http://www.ross.net/crc/download/crc_v3.txt
+ *
+ * crc64table_le[256] is the lookup table of a table-driver 64bit CRC
+ * calculation, which is generated by gen_crc64table.c in kernel build
+ * time. The polynomial of crc64 arithmetic is from ECMA-182 specification
+ * as well, which is defined as,
+ *
+ * x^64 + x^62 + x^57 + x^55 + x^54 + x^53 + x^52 + x^47 + x^46 + x^45 +
+ * x^40 + x^39 + x^38 + x^37 + x^35 + x^33 + x^32 + x^31 + x^29 + x^27 +
+ * x^24 + x^23 + x^22 + x^21 + x^19 + x^17 + x^13 + x^12 + x^10 + x^9 +
+ * x^7 + x^4 + x + 1
+ *
+ * Copyright 2018 SUSE Linux.
+ *   Author: Coly Li <colyli@suse.de>
+ *
+ */
+
+#include <linux/module.h>
+#include <uapi/linux/types.h>
+#include "crc64table.h"
+
+MODULE_DESCRIPTION("CRC64 calculations");
+MODULE_LICENSE("GPL");
+
+__le64 crc64_le_update(__le64 crc, const void *_p, size_t len)
+{
+	size_t i, t;
+
+	const unsigned char *p = _p;
+
+	for (i = 0; i < len; i++) {
+		t = ((crc >> 56) ^ (__le64)(*p++)) & 0xFF;
+		crc = crc64table_le[t] ^ (crc << 8);
+	}
+
+	return crc;
+}
+EXPORT_SYMBOL_GPL(crc64_le_update);
+
+__le64 crc64_le(const void *p, size_t len)
+{
+	__le64 crc = 0x0000000000000000ULL;