netdev - Re: [PATCH v2 1/3] genetlink: Add per family bind/unbind callbacks

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Date: Tue, 6 Feb 2024 18:42:02 -0800
From: Jakub Kicinski <kuba@...nel.org>
To: Stanislaw Gruszka <stanislaw.gruszka@...ux.intel.com>
Cc: linux-pm@...r.kernel.org, "Rafael J. Wysocki" <rafael@...nel.org>,
 Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>, Ricardo Neri
 <ricardo.neri-calderon@...ux.intel.com>, Daniel Lezcano
 <daniel.lezcano@...aro.org>, "David S. Miller" <davem@...emloft.net>, Eric
 Dumazet <edumazet@...gle.com>, Paolo Abeni <pabeni@...hat.com>, Jiri Pirko
 <jiri@...nulli.us>, Johannes Berg <johannes@...solutions.net>, Florian
 Westphal <fw@...len.de>, netdev@...r.kernel.org
Subject: Re: [PATCH v2 1/3] genetlink: Add per family bind/unbind callbacks

On Tue,  6 Feb 2024 14:36:03 +0100 Stanislaw Gruszka wrote:
> +static void genl_unbind(struct net *net, int group)
> +{
> +	const struct genl_family *family;
> +	unsigned int id;
> +
> +	down_read(&cb_lock);
> +
> +	idr_for_each_entry(&genl_fam_idr, family, id) {
> +		const struct genl_multicast_group *grp;
> +		int i;
> +
> +		if (family->n_mcgrps == 0)
> +			continue;
> +
> +		i = group - family->mcgrp_offset;
> +		if (i < 0 || i >= family->n_mcgrps)
> +			continue;
> +
> +		grp = &family->mcgrps[i];
> +
> +		if (family->unbind)
> +			family->unbind(i);
> +
> +		break;

Compiler says:

net/netlink/genetlink.c:1857:52: warning: variable ‘grp’ set but not used [-Wunused-but-set-variable]
 1857 |                 const struct genl_multicast_group *grp;
      |                                                    ^~~
-- 
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