linux-kernel - Re: [PATCH] include: net: add dsa_cpu

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Message-ID: <YGz53WOsrZ0lVfyL@lunn.ch>
Date:   Wed, 7 Apr 2021 02:16:29 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Ansuel Smith <ansuelsmth@...il.com>
Cc:     Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] include: net: add dsa_cpu_ports function

On Tue, Apr 06, 2021 at 05:49:03AM +0200, Ansuel Smith wrote:
> In preparation for the future when dsa will support multi cpu port,
> dsa_cpu_ports can be useful for switch that has multiple cpu port to
> retrieve the cpu mask for ACL and bridge table.
> 
> Signed-off-by: Ansuel Smith <ansuelsmth@...il.com>
> ---
>  include/net/dsa.h | 12 ++++++++++++
>  1 file changed, 12 insertions(+)
> 
> diff --git a/include/net/dsa.h b/include/net/dsa.h
> index 83a933e563fe..d71b1acd9c3e 100644
> --- a/include/net/dsa.h
> +++ b/include/net/dsa.h
> @@ -446,6 +446,18 @@ static inline u32 dsa_user_ports(struct dsa_switch *ds)
>  	return mask;
>  }
>  
> +static inline u32 dsa_cpu_ports(struct dsa_switch *ds)
> +{
> +	u32 mask = 0;
> +	int p;
> +
> +	for (p = 0; p < ds->num_ports; p++)
> +		if (dsa_is_cpu_port(ds, p))
> +			mask |= BIT(p);
> +
> +	return mask;
> +}

Hi Ansuel

We don't add a function unless it has a user. Please call it from somewhere.

   Andrew