net/mlx5e: Replace zero-length arrays with DECLARE_FLEX_ARRAY() helper

Zero-length arrays are deprecated and we are moving towards adopting
C99 flexible-array members, instead. So, replace zero-length arrays
declarations in anonymous union with the new DECLARE_FLEX_ARRAY()
helper macro.

This helper allows for flexible-array members in unions.

Link: https://github.com/KSPP/linux/issues/193
Link: https://github.com/KSPP/linux/issues/222
Link: https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.h b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.h
index 48241317a53545ce7c46e40c9a60aafbcf301650..0db41fa4a9a64e152acfac728573e581acf85ca2 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.h
@@ -97,8 +97,8 @@ struct mlx5_flow_attr {
        } lag;
        /* keep this union last */
        union {
-               struct mlx5_esw_flow_attr esw_attr[0];
-               struct mlx5_nic_flow_attr nic_attr[0];
+               DECLARE_FLEX_ARRAY(struct mlx5_esw_flow_attr, esw_attr);
+               DECLARE_FLEX_ARRAY(struct mlx5_nic_flow_attr, nic_attr);
        };
 };