netdev - [PATCH net-next 3/3] net/mlx5: E-Switch, Reduce ingress acl modify metadata stack usage

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Message-ID: <20190711193937.29802-4-saeedm@mellanox.com>
Date:   Thu, 11 Jul 2019 19:39:59 +0000
From:   Saeed Mahameed <saeedm@...lanox.com>
To:     "David S. Miller" <davem@...emloft.net>
CC:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        Saeed Mahameed <saeedm@...lanox.com>,
        Jianbo Liu <jianbol@...lanox.com>
Subject: [PATCH net-next 3/3] net/mlx5: E-Switch, Reduce ingress acl modify
 metadata stack usage

Fix the following compiler warning:
In function ‘esw_vport_add_ingress_acl_modify_metadata’:
the frame size of 1084 bytes is larger than 1024 bytes [-Wframe-larger-than=]

Since the structure is never written to, we can statically allocate
it to avoid the stack usage.

Fixes: 7445cfb1169c ("net/mlx5: E-Switch, Tag packet with vport number in VF vports and uplink ingress ACLs")
Signed-off-by: Saeed Mahameed <saeedm@...lanox.com>
Reviewed-by: Jianbo Liu <jianbol@...lanox.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
index 8ed4497929b9..5f78e76019c5 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
@@ -1785,8 +1785,8 @@ static int esw_vport_add_ingress_acl_modify_metadata(struct mlx5_eswitch *esw,
 						     struct mlx5_vport *vport)
 {
 	u8 action[MLX5_UN_SZ_BYTES(set_action_in_add_action_in_auto)] = {};
+	static const struct mlx5_flow_spec spec = {};
 	struct mlx5_flow_act flow_act = {};
-	struct mlx5_flow_spec spec = {};
 	int err = 0;
 
 	MLX5_SET(set_action_in, action, action_type, MLX5_ACTION_TYPE_SET);
-- 
2.21.0