We already define IFLA_PROMISCUITY and some other of these masks in
order to allow building with older headers. Define IFLA_EXT_MASK too,
which was added in the same kernel version as IFLA_PROMISCUITY (v3.10).
#endif
#if !HAVE_DECL_IFLA_PHYS_PORT_ID
#endif
#if !HAVE_DECL_IFLA_PHYS_PORT_ID
+#define IFLA_EXT_MASK 29
#undef IFLA_PROMISCUITY
#define IFLA_PROMISCUITY 30
#define IFLA_NUM_TX_QUEUES 31
#undef IFLA_PROMISCUITY
#define IFLA_PROMISCUITY 30
#define IFLA_NUM_TX_QUEUES 31