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Date: Sat, 1 Jun 2024 12:35:57 +0100
From: Simon Horman <horms@kernel.org>
To: Joe Damato <jdamato@fastly.com>
Cc: linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
	nalramli@fastly.com, Saeed Mahameed <saeedm@nvidia.com>,
	Tariq Toukan <tariqt@nvidia.com>, Leon Romanovsky <leon@kernel.org>,
	"David S. Miller" <davem@davemloft.net>,
	Eric Dumazet <edumazet@google.com>,
	Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
	"open list:MELLANOX MLX5 core VPI driver" <linux-rdma@vger.kernel.org>
Subject: Re: [RFC net-next v3 1/2] net/mlx5e: Add helpers to calculate txq
 and ch idx
Message-ID: <20240601113557.GE491852@kernel.org>
References: <20240529031628.324117-1-jdamato@fastly.com>
 <20240529031628.324117-2-jdamato@fastly.com>
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In-Reply-To: <20240529031628.324117-2-jdamato@fastly.com>

On Wed, May 29, 2024 at 03:16:26AM +0000, Joe Damato wrote:
> Add two helpers to:
> 
> 1. Compute the txq_ix given a channel and a tc offset (tc_to_txq_ix).
> 2. Compute the channel index and tc offset given a txq_ix
>    (txq_ix_to_chtc_ix).
> 
> The first helper, tc_to_txq_ix, is used in place of the mathematical
> expressionin mlx5e_open_sqs when txq_ix values are computed.
> 
> The second helper, txq_ix_to_chtc_ix, will be used in a following patch.

Hi Joe,

I think it would be best to add txq_ix_to_chtc_ix as part of patch that
uses it, because the current arrangement will cause allmodconfigs with
clang-18 and W=1 to fail due to txq_ix_to_chtc_ix being unused.

...