--- linux-4.9.37/drivers/fence/Makefile 1970-01-01 03:00:00.000000000 +0300
+++ linux-4.9.y/drivers/fence/Makefile 2021-06-07 13:01:33.000000000 +0300
@@ -0,0 +1,2 @@
+
+obj-y += sw_sync.o sync.o sync_debug.o