From: Xiaoyu Min <jackmin@mellanox.com>
Date: Mon, 15 Oct 2018 01:45:23 +0000 (+0000)
Subject: net/mlx5: fix build with zero-size array
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=0eef26d073ea65d966cd512303c30ea7ca924e1d;p=dpdk.git

net/mlx5: fix build with zero-size array

If the build environment doesn't have 'linux/tc_act/tc_pedit.h' header,
compiler will use needed structs defined in mlx5_flow_tcf.c.

However, there is a zero-size array defined in one struct and
ISO C forbids this when -Wpedantic is set by debug mode.

Simply put __extension__ keyword before the struct in question.

Fixes: 2ed2fe5f0a9c ("net/mlx5: rewrite IP address UDP/TCP port by E-Switch")

Signed-off-by: Xiaoyu Min <jackmin@mellanox.com>
---

diff --git a/drivers/net/mlx5/mlx5_flow_tcf.c b/drivers/net/mlx5/mlx5_flow_tcf.c
index 1e1102e079..4b51a854e8 100644
--- a/drivers/net/mlx5/mlx5_flow_tcf.c
+++ b/drivers/net/mlx5/mlx5_flow_tcf.c
@@ -93,19 +93,20 @@ enum pedit_cmd {
 };
 
 struct tc_pedit_key {
-	__u32           mask;  /* AND */
-	__u32           val;   /*XOR */
-	__u32           off;  /*offset */
-	__u32           at;
-	__u32           offmask;
-	__u32           shift;
+	__u32 mask; /* AND */
+	__u32 val; /*XOR */
+	__u32 off; /*offset */
+	__u32 at;
+	__u32 offmask;
+	__u32 shift;
 };
 
+__extension__
 struct tc_pedit_sel {
 	tc_gen;
-	unsigned char           nkeys;
-	unsigned char           flags;
-	struct tc_pedit_key     keys[0];
+	unsigned char nkeys;
+	unsigned char flags;
+	struct tc_pedit_key keys[0];
 };
 
 #endif /* HAVE_TC_ACT_VLAN */