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diff --git a/include/tables_csum.h b/include/tables_csum.h
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+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
+ */
+
+#ifndef _TABLES_CSUM_H_
+#define _TABLES_CSUM_H_
+
+/**
+ * table_compute_checksum() - Compute a table checksum
+ *
+ * This computes an 8-bit checksum for the configuration table.
+ * All bytes in the configuration table, including checksum itself and
+ * reserved bytes must add up to zero.
+ *
+ * @v: configuration table base address
+ * @len: configuration table size
+ * @return: the 8-bit checksum
+ */
+u8 table_compute_checksum(const void *v, const int len);
+
+#endif