--- linux-4.9.37/drivers/dma-buf/sw_sync.h	1970-01-01 03:00:00.000000000 +0300
+++ linux-4.9.y/drivers/dma-buf/sw_sync.h	2021-06-07 13:01:33.000000000 +0300
@@ -0,0 +1,43 @@
+/*
+ * include/linux/sw_sync.h
+ *
+ * Copyright (C) 2012 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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.
+ *
+ */
+
+#ifndef _LINUX_SW_SYNC_H
+#define _LINUX_SW_SYNC_H
+
+#include <linux/types.h>
+#include <linux/kconfig.h>
+#include "sync.h"
+#include "_sw_sync.h"
+#include <linux/sync_file.h>
+
+struct sw_sync_timeline {
+	struct	sync_timeline	obj;
+
+	u32			value;
+};
+
+struct sw_sync_pt {
+	struct sync_pt		pt;
+
+	u32			value;
+};
+
+struct sw_sync_timeline *bsp_sw_sync_timeline_create(const char *name);
+void bsp_sw_sync_timeline_inc(struct sw_sync_timeline *obj, u32 inc);
+
+struct sync_pt *bsp_sw_sync_pt_create(struct sw_sync_timeline *obj, u32 value);
+
+#endif /* _LINUX_SW_SYNC_H */