net: fix build with pedantic

The following error popped when compiling with -pedantic:

In file included from
 drivers/net/mlx5/mlx5_flow_dv.c:28:0:
 include/rte_gre.h:20:2:
 error: type of bit-field 'res2' is a GCC  extension [-Werror=pedantic]
 uint16_t res2:4; /**< Reserved */

Fixing by adding the __extension__ attribute.

Fixes: 894f71a3805d ("net: add GRE header structure")
Cc: stable@dpdk.org
Signed-off-by: Shahaf Shuler <shahafs@mellanox.com>
Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>

diff --git a/lib/librte_net/rte_gre.h b/lib/librte_net/rte_gre.h
index 69499bb..05aa9d1 100644 (file)
--- a/lib/librte_net/rte_gre.h
+++ b/lib/librte_net/rte_gre.h
@@ -15,6 +15,7 @@ extern "C" {
 /**
  * GRE Header
  */
+__extension__
 struct gre_hdr {
 #if RTE_BYTE_ORDER == RTE_LITTLE_ENDIAN
        uint16_t res2:4; /**< Reserved */