linux-kernel - Re: [PATCH net-next v2 2/2] net: dsa: Rename IFLA_DSA_MASTER to IFLA_DSA

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Date:   Wed, 11 Oct 2023 16:30:03 -0700
From:   Stephen Hemminger <stephen@...workplumber.org>
To:     Florian Fainelli <florian.fainelli@...adcom.com>
Cc:     netdev@...r.kernel.org, Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Broadcom internal kernel review list 
        <bcm-kernel-feedback-list@...adcom.com>,
        linux-kernel@...r.kernel.org (open list:ARM/Mediatek SoC support),
        linux-arm-kernel@...ts.infradead.org (moderated list:ARM/Mediatek SoC
        support)
Subject: Re: [PATCH net-next v2 2/2] net: dsa: Rename IFLA_DSA_MASTER to
 IFLA_DSA_CONDUIT

On Wed, 11 Oct 2023 15:20:26 -0700
Florian Fainelli <florian.fainelli@...adcom.com> wrote:

>  enum {
>  	IFLA_DSA_UNSPEC,
> -	IFLA_DSA_MASTER,
> +	IFLA_DSA_CONDUIT,
> +	/* Deprecated, use IFLA_DSA_CONDUIT insted */
> +	IFLA_DSA_MASTER = IFLA_DSA_CONDUIT,
>  	__IFLA_DSA_MAX,
>  };

minor nit s/insted/instead/

I don't know if it would be acceptable in the kernel UAPI but what
we did in DPDK for similar situation to cause warning on use of deprecated value.



/**
 *  Macro to mark macros and defines scheduled for removal
 */
#if defined(RTE_CC_GCC) || defined(RTE_CC_CLANG)
#define RTE_PRAGMA(x)  _Pragma(#x)
#define RTE_PRAGMA_WARNING(w) RTE_PRAGMA(GCC warning #w)
#define RTE_DEPRECATED(x)  RTE_PRAGMA_WARNING(#x is deprecated)
#else
#define RTE_DEPRECATED(x)
#endif

...
#define RTE_DEV_WHITELISTED \
	RTE_DEPRECATED(RTE_DEV_WHITELISTED) RTE_DEV_ALLOWED
#define RTE_DEV_BLACKLISTED \
	RTE_DEPRECATED(RTE_DEV_BLACKLISTED) RTE_DEV_BLOCKED