linux-kernel - Re: [PATCH] net: mscc: ocelot: remove incompatible prototypes

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Date:   Tue, 18 Apr 2023 19:17:15 +0300
From:   Vladimir Oltean <vladimir.oltean@....com>
To:     Arnd Bergmann <arnd@...nel.org>
Cc:     Claudiu Manoil <claudiu.manoil@....com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        UNGLinuxDriver@...rochip.com,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Jacob Keller <jacob.e.keller@...el.com>,
        Arnd Bergmann <arnd@...db.de>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net: mscc: ocelot: remove incompatible prototypes

On Mon, Apr 17, 2023 at 10:55:25PM +0200, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@...db.de>
> 
> The types for the register argument changed recently, but there are
> still incompatible prototypes that got left behind, and gcc-13 warns
> about these:
> 
> In file included from drivers/net/ethernet/mscc/ocelot.c:13:
> drivers/net/ethernet/mscc/ocelot.h:97:5: error: conflicting types for 'ocelot_port_readl' due to enum/integer mismatch; have 'u32(struct ocelot_port *, u32)' {aka 'unsigned int(struct ocelot_port *, unsigned int)'} [-Werror=enum-int-mismatch]
>    97 | u32 ocelot_port_readl(struct ocelot_port *port, u32 reg);
>       |     ^~~~~~~~~~~~~~~~~
> 
> Just remove the two prototypes, and rely on the copy in the global
> header.
> 
> Fixes: 9ecd05794b8d ("net: mscc: ocelot: strengthen type of "u32 reg" in I/O accessors")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> ---

Interesting, I didn't even realize we had these duplicated there. Thanks.
FWIW, they were duplicated in commit 5e2563650232 ("net: mscc: ocelot:
publish structure definitions to include/soc/mscc/ocelot.h") and haven't
bothered anybody since then.

Reviewed-by: Vladimir Oltean <vladimir.oltean@....com>