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>

drivers/net/ixgbe/ixgbe.h

@@ -397,7 +397,7 @@ enum ixgbe_boards {
 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);

drivers/net/ixgbe/ixgbe_dcb_nl.c

@@ -563,7 +563,7 @@ static u8 ixgbe_dcbnl_setapp(struct net_device *netdev,
 	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,

include/linux/netdevice.h

@@ -909,7 +909,7 @@ struct net_device
 
 #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)