dcb: data center bridging ops should be r/o

The data center bridging ops structure can be const

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Acked-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ixgbe/ixgbe.h b/drivers/net/ixgbe/ixgbe.h
index 385be60..28f32da 100644
--- a/drivers/net/ixgbe/ixgbe.h
+++ b/drivers/net/ixgbe/ixgbe.h
@@ -397,7 +397,7 @@
 extern struct ixgbe_info ixgbe_82598_info;
 extern struct ixgbe_info ixgbe_82599_info;
 #ifdef CONFIG_IXGBE_DCB
-extern struct dcbnl_rtnl_ops dcbnl_ops;
+extern const struct dcbnl_rtnl_ops dcbnl_ops;
 extern int ixgbe_copy_dcb_cfg(struct ixgbe_dcb_config *src_dcb_cfg,
                               struct ixgbe_dcb_config *dst_dcb_cfg,
                               int tc_max);
diff --git a/drivers/net/ixgbe/ixgbe_dcb_nl.c b/drivers/net/ixgbe/ixgbe_dcb_nl.c
index a6bc1ef..3c7a79a 100644
--- a/drivers/net/ixgbe/ixgbe_dcb_nl.c
+++ b/drivers/net/ixgbe/ixgbe_dcb_nl.c
@@ -563,7 +563,7 @@
 	return rval;
 }
 
-struct dcbnl_rtnl_ops dcbnl_ops = {
+const struct dcbnl_rtnl_ops dcbnl_ops = {
 	.getstate	= ixgbe_dcbnl_get_state,
 	.setstate	= ixgbe_dcbnl_set_state,
 	.getpermhwaddr	= ixgbe_dcbnl_get_perm_hw_addr,
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 94958c1..b332eef 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -909,7 +909,7 @@
 
 #ifdef CONFIG_DCB
 	/* Data Center Bridging netlink ops */
-	struct dcbnl_rtnl_ops *dcbnl_ops;
+	const struct dcbnl_rtnl_ops *dcbnl_ops;
 #endif
 
 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)