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diff --git a/storage/innobase/include/buf0flu.ic b/storage/innobase/include/buf0flu.ic
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+++ b/storage/innobase/include/buf0flu.ic
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+/*****************************************************************************
+
+Copyright (c) 1995, 2015, Oracle and/or its affiliates. All Rights Reserved.
+Copyright (c) 2019, 2021, 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/buf0flu.ic
+The database buffer pool flush algorithm
+
+Created 11/5/1995 Heikki Tuuri
+*******************************************************/
+
+#include "assume_aligned.h"
+#include "buf0buf.h"
+#include "srv0srv.h"
+
+/********************************************************************//**
+This function should be called at a mini-transaction commit, if a page was
+modified in it. Puts the block to the list of modified blocks, if it is not
+already in it. */
+UNIV_INLINE
+void
+buf_flush_note_modification(
+/*========================*/
+	buf_block_t*	block,		/*!< in: block which is modified */
+	lsn_t		start_lsn,	/*!< in: start lsn of the mtr that
+					modified this block */
+	lsn_t		end_lsn)	/*!< in: end lsn of the mtr that
+					modified this block */
+{
+	ut_ad(!srv_read_only_mode);
+	ut_ad(block->page.state() == BUF_BLOCK_FILE_PAGE);
+	ut_ad(block->page.buf_fix_count());
+	ut_ad(mach_read_from_8(block->frame + FIL_PAGE_LSN) <= end_lsn);
+	mach_write_to_8(block->frame + FIL_PAGE_LSN, end_lsn);
+	if (UNIV_LIKELY_NULL(block->page.zip.data)) {
+		memcpy_aligned<8>(FIL_PAGE_LSN + block->page.zip.data,
+				  FIL_PAGE_LSN + block->frame, 8);
+	}
+
+	const lsn_t oldest_modification = block->page.oldest_modification();
+
+	if (oldest_modification > 1) {
+		ut_ad(oldest_modification <= start_lsn);
+	} else if (fsp_is_system_temporary(block->page.id().space())) {
+		block->page.set_temp_modified();
+	} else {
+		buf_pool.insert_into_flush_list(block, start_lsn);
+	}
+
+	srv_stats.buf_pool_write_requests.inc();
+}