linux-kernel - Re: [net-next PATCH 1/2] net: ethtool: add define for link speed mode number

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Message-ID: <ZXoPwmDsy7geZe6N@shell.armlinux.org.uk>
Date:   Wed, 13 Dec 2023 20:10:42 +0000
From:   "Russell King (Oracle)" <linux@...linux.org.uk>
To:     Christian Marangi <ansuelsmth@...il.com>
Cc:     Andrew Lunn <andrew@...n.ch>,
        Heiner Kallweit <hkallweit1@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Vladimir Oltean <vladimir.oltean@....com>,
        Vincent Mailhol <mailhol.vincent@...adoo.fr>,
        Kees Cook <keescook@...omium.org>,
        Piergiorgio Beruto <piergiorgio.beruto@...il.com>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [net-next PATCH 1/2] net: ethtool: add define for link speed
 mode number

NAK.

You *clearly* didn't look before you leaped.

On Wed, Dec 13, 2023 at 07:15:53PM +0100, Christian Marangi wrote:
> +enum ethtool_link_speeds {
> +	SPEED_10 = 0,
> +	SPEED_100,
> +	SPEED_1000,
...

and from the context immediately below, included in your patch:
>  #define SPEED_10		10
           ^^^^^^^^
>  #define SPEED_100		100
           ^^^^^^^^^
>  #define SPEED_1000		1000
           ^^^^^^^^^^

Your enumerated values will be overridden by the preprocessor
definitions.

Moreover, SPEED_xxx is an already taken namespace and part of the UAPI,
and thus can _not_ be changed. Convention is that SPEED_x will be
defined as the numeric speed.

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
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