linux-kernel - Re: [PATCH v4 net-next 05/11] net/nebula-matrix: add channel layer

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Message-ID: <0adbe485-867f-48f5-a805-d45bfd300452@lunn.ch>
Date: Fri, 6 Feb 2026 04:47:58 +0100
From: Andrew Lunn <andrew@...n.ch>
To: "illusion.wang" <illusion.wang@...ula-matrix.com>
Cc: dimon.zhao@...ula-matrix.com, alvin.wang@...ula-matrix.com,
	sam.chen@...ula-matrix.com, netdev@...r.kernel.org,
	andrew+netdev@...n.ch, corbet@....net, kuba@...nel.org,
	linux-doc@...r.kernel.org, lorenzo@...nel.org, pabeni@...hat.com,
	horms@...nel.org, vadim.fedorenko@...ux.dev,
	lukas.bulwahn@...hat.com, edumazet@...gle.com,
	open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4 net-next 05/11] net/nebula-matrix: add channel layer

> +static int nbl_chan_init_msg_handler(struct nbl_channel_mgt *chan_mgt)
> +{
> +	struct nbl_common_info *common = chan_mgt->common;
> +	struct nbl_hash_tbl_key tbl_key;
> +	int ret = 0;
> +
> +	NBL_HASH_TBL_KEY_INIT(&tbl_key, common->dev, sizeof(u16),
> +			      sizeof(struct nbl_chan_msg_node_data),
> +			      NBL_CHAN_HANDLER_TBL_BUCKET_SIZE);


> +#define NBL_HASH_TBL_KEY_INIT(key, dev_arg, key_size_arg, data_size_arg,\
> +			      bucket_size_arg)		\
> +do {									\
> +	typeof(key)	__key   = key;					\
> +	__key->dev		= dev_arg;				\
> +	__key->key_size		= key_size_arg;				\
> +	__key->data_size	= data_size_arg;			\
> +	__key->bucket_size	= bucket_size_arg;			\
> +	__key->resv		= 0;					\
> +} while (0)


Why a macro? This could be a function. I don't see anything magical
here.

	Andrew