netdev - [net-next 12/15] net/mlx5e: Replace zero-length array with flexible-array member

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Date:   Tue, 10 Jan 2023 21:30:42 -0800
From:   Saeed Mahameed <saeed@...nel.org>
To:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Eric Dumazet <edumazet@...gle.com>
Cc:     Saeed Mahameed <saeedm@...dia.com>, netdev@...r.kernel.org,
        Tariq Toukan <tariqt@...dia.com>,
        "Gustavo A. R. Silva" <gustavoars@...nel.org>
Subject: [net-next 12/15] net/mlx5e: Replace zero-length array with flexible-array member

From: "Gustavo A. R. Silva" <gustavoars@...nel.org>

Zero-length arrays are deprecated[1] and we are moving towards
adopting C99 flexible-array members instead. So, replace zero-length
array declaration in struct mlx5e_flow_meter_aso_obj with flex-array
member.

This helps with the ongoing efforts to tighten the FORTIFY_SOURCE
routines on memcpy() and help us make progress towards globally
enabling -fstrict-flex-arrays=3 [2].

Link: https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays [1]
Link: https://gcc.gnu.org/pipermail/gcc-patches/2022-October/602902.html [2]
Link: https://github.com/KSPP/linux/issues/78
Signed-off-by: Gustavo A. R. Silva <gustavoars@...nel.org>
Signed-off-by: Saeed Mahameed <saeedm@...dia.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/en/tc/meter.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/tc/meter.c b/drivers/net/ethernet/mellanox/mlx5/core/en/tc/meter.c
index 78af8a3175bf..7758a425bfa8 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/tc/meter.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/tc/meter.c
@@ -28,7 +28,7 @@ struct mlx5e_flow_meter_aso_obj {
 	int base_id;
 	int total_meters;
 
-	unsigned long meters_map[0]; /* must be at the end of this struct */
+	unsigned long meters_map[]; /* must be at the end of this struct */
 };
 
 struct mlx5e_flow_meters {
-- 
2.39.0