net: Do not call fib6_info_hw_flags_set() when IPv6 is disabled

With the next patch mlxsw and netdevsim will fail in compilation if
CONFIG_IPV6 is disabled.

Do not call fib6_info_hw_flags_set() when IPv6 is disabled.
Signed-off-by: Amit Cohen <amcohen@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c

@@ -4988,6 +4988,7 @@ mlxsw_sp_fib4_entry_hw_flags_clear(struct mlxsw_sp *mlxsw_sp,
 	fib_alias_hw_flags_set(mlxsw_sp_net(mlxsw_sp), &fri);
 }
 
+#if IS_ENABLED(CONFIG_IPV6)
 static void
 mlxsw_sp_fib6_entry_hw_flags_set(struct mlxsw_sp *mlxsw_sp,
 				 struct mlxsw_sp_fib_entry *fib_entry)
@@ -5007,7 +5008,15 @@ mlxsw_sp_fib6_entry_hw_flags_set(struct mlxsw_sp *mlxsw_sp,
 		fib6_info_hw_flags_set(mlxsw_sp_net(mlxsw_sp), mlxsw_sp_rt6->rt,
 				       should_offload, !should_offload);
 }
+#else
+static void
+mlxsw_sp_fib6_entry_hw_flags_set(struct mlxsw_sp *mlxsw_sp,
+				 struct mlxsw_sp_fib_entry *fib_entry)
+{
+}
+#endif
 
+#if IS_ENABLED(CONFIG_IPV6)
 static void
 mlxsw_sp_fib6_entry_hw_flags_clear(struct mlxsw_sp *mlxsw_sp,
 				   struct mlxsw_sp_fib_entry *fib_entry)
@@ -5021,6 +5030,13 @@ mlxsw_sp_fib6_entry_hw_flags_clear(struct mlxsw_sp *mlxsw_sp,
 		fib6_info_hw_flags_set(mlxsw_sp_net(mlxsw_sp), mlxsw_sp_rt6->rt,
 				       false, false);
 }
+#else
+static void
+mlxsw_sp_fib6_entry_hw_flags_clear(struct mlxsw_sp *mlxsw_sp,
+				   struct mlxsw_sp_fib_entry *fib_entry)
+{
+}
+#endif
 
 static void
 mlxsw_sp_fib_entry_hw_flags_set(struct mlxsw_sp *mlxsw_sp,

drivers/net/netdevsim/fib.c

@@ -585,6 +585,7 @@ static int nsim_fib6_rt_append(struct nsim_fib_data *data,
 	return err;
 }
 
+#if IS_ENABLED(CONFIG_IPV6)
 static void nsim_fib6_rt_hw_flags_set(struct nsim_fib_data *data,
 				      const struct nsim_fib6_rt *fib6_rt,
 				      bool trap)
@@ -595,6 +596,13 @@ static void nsim_fib6_rt_hw_flags_set(struct nsim_fib_data *data,
 	list_for_each_entry(fib6_rt_nh, &fib6_rt->nh_list, list)
 		fib6_info_hw_flags_set(net, fib6_rt_nh->rt, false, trap);
 }
+#else
+static void nsim_fib6_rt_hw_flags_set(struct nsim_fib_data *data,
+				      const struct nsim_fib6_rt *fib6_rt,
+				      bool trap)
+{
+}
+#endif
 
 static int nsim_fib6_rt_add(struct nsim_fib_data *data,
 			    struct nsim_fib6_rt *fib6_rt)