v4.19.13 snapshot.
diff --git a/drivers/target/loopback/Makefile b/drivers/target/loopback/Makefile
new file mode 100644
index 0000000..6abebdf
--- /dev/null
+++ b/drivers/target/loopback/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_LOOPBACK_TARGET)	+= tcm_loop.o