Re: [PATCH] mlx4: style: replace zero-length array with flexible-array member.

[Tariq Toukan]

On 12/30/2020 8:28 AM, YANG LI wrote:
> There is a regular need in the kernel to provide a way to declare
> having a dynamically sized set of trailing elements in a structure.
> Kernel code should always use "flexible array members"[1] for these
> cases. The older style of one-element or zero-length arrays should
> no longer be used[2].
>
> [1] https://en.wikipedia.org/wiki/Flexible_array_member
> [2] https://www.kernel.org/doc/html/v5.9/process/
>      deprecated.html#zero-length-and-one-element-arrays
>
> Signed-off-by: YANG LI <abaci-bugfix@xxxxxxxxxxxxxxxxx>
> Reported-by: Abaci <abaci@xxxxxxxxxxxxxxxxx>
> ---
>   drivers/net/ethernet/mellanox/mlx4/mlx4_en.h | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h b/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h
> index e8ed2319..4029a8b 100644
> --- a/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h
> +++ b/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h
> @@ -314,7 +314,7 @@ struct mlx4_en_tx_ring {
>   
>   struct mlx4_en_rx_desc {
>   	/* actual number of entries depends on rx ring stride */
> -	struct mlx4_wqe_data_seg data[0];
> +	struct mlx4_wqe_data_seg data[];
>   };
>   
>   struct mlx4_en_rx_ring {

Reviewed-by: Tariq Toukan <tariqt@xxxxxxxxxx>

Thanks.