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diff --git a/storage/innobase/include/trx0rseg.ic b/storage/innobase/include/trx0rseg.ic
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+++ b/storage/innobase/include/trx0rseg.ic
@@ -0,0 +1,72 @@
+/*****************************************************************************
+
+Copyright (c) 1996, 2013, Oracle and/or its affiliates. All Rights Reserved.
+Copyright (c) 2017, 2020, MariaDB Corporation.
+
+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, Fifth Floor, Boston, MA 02110-1335 USA
+
+*****************************************************************************/
+
+/**************************************************//**
+@file include/trx0rseg.ic
+Rollback segment
+
+Created 3/26/1996 Heikki Tuuri
+*******************************************************/
+
+#include "srv0srv.h"
+#include "mtr0log.h"
+
+/** Gets a rollback segment header.
+@param[in]	space		space where placed
+@param[in]	page_no		page number of the header
+@param[in,out]	mtr		mini-transaction
+@return rollback segment header, page x-latched */
+UNIV_INLINE
+buf_block_t*
+trx_rsegf_get(fil_space_t* space, uint32_t page_no, mtr_t* mtr)
+{
+	ut_ad(space == fil_system.sys_space || space == fil_system.temp_space
+	      || srv_is_undo_tablespace(space->id)
+	      || !srv_was_started);
+
+	buf_block_t* block = buf_page_get(page_id_t(space->id, page_no),
+					  0, RW_X_LATCH, mtr);
+
+	buf_block_dbg_add_level(block, SYNC_RSEG_HEADER);
+	return block;
+}
+
+/** Gets a newly created rollback segment header.
+@param[in]	space		space where placed
+@param[in]	page_no		page number of the header
+@param[in,out]	mtr		mini-transaction
+@return rollback segment header, page x-latched */
+UNIV_INLINE
+buf_block_t*
+trx_rsegf_get_new(
+	ulint			space,
+	uint32_t		page_no,
+	mtr_t*			mtr)
+{
+	buf_block_t*	block;
+
+	ut_ad(space <= srv_undo_tablespaces_active || space == SRV_TMP_SPACE_ID
+	      || !srv_was_started);
+	ut_ad(space <= TRX_SYS_MAX_UNDO_SPACES || space == SRV_TMP_SPACE_ID);
+
+	block = buf_page_get(page_id_t(space, page_no), 0, RW_X_LATCH, mtr);
+
+	buf_block_dbg_add_level(block, SYNC_RSEG_HEADER_NEW);
+	return block;
+}