diff --git a/include/linux/libata.h b/include/linux/libata.h
index a539031..1464a75 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -405,6 +405,7 @@
 	unsigned long		mwdma_mask;
 	unsigned long		udma_mask;
 	const struct ata_port_operations *port_ops;
+	void 			*private_data;
 };
 
 struct ata_timing {