linux-kernel - Re: [PATCH] net/mlx4: Use ARRAY

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Date:   Tue, 17 Aug 2021 17:39:18 -0700
From:   Joe Perches <joe@...ches.com>
To:     Jason Wang <wangborong@...rlc.com>, kuba@...nel.org
Cc:     davem@...emloft.net, tariqt@...dia.com, netdev@...r.kernel.org,
        linux-rdma@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net/mlx4: Use ARRAY_SIZE to get an array's size

On Tue, 2021-08-17 at 20:11 +0800, Jason Wang wrote:
> The ARRAY_SIZE macro is defined to get an array's size which is
> more compact and more formal in linux source. Thus, we can replace
> the long sizeof(arr)/sizeof(arr[0]) with the compact ARRAY_SIZE.
[]
> diff --git a/drivers/net/ethernet/mellanox/mlx4/qp.c b/drivers/net/ethernet/mellanox/mlx4/qp.c
[]
> @@ -739,7 +739,7 @@ static void mlx4_cleanup_qp_zones(struct mlx4_dev *dev)
>  		int i;
>  
> 
>  		for (i = 0;
> -		     i < sizeof(qp_table->zones_uids)/sizeof(qp_table->zones_uids[0]);
> +		     i < ARRAY_SIZE(qp_table->zones_uids);
>  		     i++) {

trivia:  could now be a single line

		for (i = 0; i < ARRAY_SIZE(qp_table->zones_uids); i++) {