static struct genl_family dp_flow_genl_family;
 static struct genl_family dp_datapath_genl_family;
 
-static struct genl_multicast_group ovs_dp_flow_multicast_group = {
-       .name = OVS_FLOW_MCGROUP
+static const struct genl_multicast_group ovs_dp_flow_multicast_group = {
+       .name = OVS_FLOW_MCGROUP,
 };
 
-static struct genl_multicast_group ovs_dp_datapath_multicast_group = {
-       .name = OVS_DATAPATH_MCGROUP
+static const struct genl_multicast_group ovs_dp_datapath_multicast_group = {
+       .name = OVS_DATAPATH_MCGROUP,
 };
 
-struct genl_multicast_group ovs_dp_vport_multicast_group = {
-       .name = OVS_VPORT_MCGROUP
+static const struct genl_multicast_group ovs_dp_vport_multicast_group = {
+       .name = OVS_VPORT_MCGROUP,
 };
 
 /* Check if need to build a reply message.
        [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG },
 };
 
-static struct genl_ops dp_flow_genl_ops[] = {
+static const struct genl_ops dp_flow_genl_ops[] = {
        { .cmd = OVS_FLOW_CMD_NEW,
          .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
          .policy = flow_policy,
        [OVS_DP_ATTR_USER_FEATURES] = { .type = NLA_U32 },
 };
 
-static struct genl_ops dp_datapath_genl_ops[] = {
+static const struct genl_ops dp_datapath_genl_ops[] = {
        { .cmd = OVS_DP_CMD_NEW,
          .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
          .policy = datapath_policy,
        [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED },
 };
 
-static struct genl_ops dp_vport_genl_ops[] = {
+static const struct genl_ops dp_vport_genl_ops[] = {
        { .cmd = OVS_VPORT_CMD_NEW,
          .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
          .policy = vport_policy,