--- zzzz-none-000/linux-4.4.60/include/linux/device-mapper.h	2017-04-08 07:53:53.000000000 +0000
+++ scorpion-7490-727/linux-4.4.60/include/linux/device-mapper.h	2021-02-04 17:41:59.000000000 +0000
@@ -603,4 +603,6 @@
 	return (n << SECTOR_SHIFT);
 }
 
+void dm_end_request(struct request *clone, int error);
+
 #endif	/* _LINUX_DEVICE_MAPPER_H */