diff --git a/include/linux/libata.h b/include/linux/libata.h
index eae7a05..47e0292 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -746,6 +746,7 @@
 	/* Flags that change dynamically, protected by ap->lock */
 	unsigned int		pflags; /* ATA_PFLAG_xxx */
 	unsigned int		print_id; /* user visible unique port ID */
+	unsigned int            local_port_no; /* host local port num */
 	unsigned int		port_no; /* 0 based port no. inside the host */
 
 #ifdef CONFIG_ATA_SFF