diff --git a/driver/xilinx_dma/README.md b/driver/xilinx_dma/README.md
index caa15d2..f1c25af 100644
--- a/driver/xilinx_dma/README.md
+++ b/driver/xilinx_dma/README.md
@@ -1,3 +1,6 @@
+
+===============Following are obsolete content=================
+
 Currently used driver xilinx_dma-orig.c is based on 552d3f11e374ca0d435aa93a571507819eabdda2 of https://github.com/Xilinx/linux-xlnx )
 
 instruction to generate our customized xilinx dma driver: