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

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Date:   Wed, 30 Dec 2020 14:28:51 +0800
From:   YANG LI <abaci-bugfix@...ux.alibaba.com>
To:     kuba@...nel.org
Cc:     davem@...emloft.net, tariqt@...dia.com, ast@...nel.org,
        daniel@...earbox.net, hawk@...nel.org, john.fastabend@...il.com,
        andrii@...nel.org, kafai@...com, songliubraving@...com, yhs@...com,
        kpsingh@...nel.org, netdev@...r.kernel.org,
        linux-rdma@...r.kernel.org, linux-kernel@...r.kernel.org,
        bpf@...r.kernel.org, YANG LI <abaci-bugfix@...ux.alibaba.com>
Subject: [PATCH] mlx4: style: replace zero-length array with flexible-array member.

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@...ux.alibaba.com>
Reported-by: Abaci <abaci@...ux.alibaba.com>
---
 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 {
-- 
1.8.3.1