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diff --git a/storage/innobase/include/trx0purge.ic b/storage/innobase/include/trx0purge.ic
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+++ b/storage/innobase/include/trx0purge.ic
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+/*****************************************************************************
+
+Copyright (c) 1996, 2009, Oracle and/or its affiliates. All Rights Reserved.
+
+This program is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free Software
+Foundation; version 2 of the License.
+
+This program is distributed in the hope that it will be useful, but WITHOUT
+ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License along with
+this program; if not, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA
+
+*****************************************************************************/
+
+/**************************************************//**
+@file include/trx0purge.ic
+Purge old versions
+
+Created 3/26/1996 Heikki Tuuri
+*******************************************************/
+
+#include "trx0undo.h"
+
+/********************************************************************//**
+Calculates the file address of an undo log header when we have the file
+address of its history list node.
+@return	file address of the log */
+UNIV_INLINE
+fil_addr_t
+trx_purge_get_log_from_hist(
+/*========================*/
+	fil_addr_t	node_addr)	/*!< in: file address of the history
+					list node of the log */
+{
+	node_addr.boffset -= TRX_UNDO_HISTORY_NODE;
+
+	return(node_addr);
+}
+
+#ifdef UNIV_DEBUG
+/********************************************************************//**
+address of its history list node.
+@return	TRUE if purge_sys_t::limit <= purge_sys_t::iter*/
+UNIV_INLINE
+ibool
+trx_purge_check_limit(void)
+/*=======================*/
+{
+	ut_ad(purge_sys->limit.trx_no <= purge_sys->iter.trx_no);
+
+	if (purge_sys->limit.trx_no == purge_sys->iter.trx_no) {
+		ut_ad(purge_sys->limit.undo_no <= purge_sys->iter.undo_no);
+	}
+
+	return(TRUE);
+}
+#endif /* UNIV_DEBUG */
+