linux-kernel - Re: [EXTERNAL] Re: [PATCH net] net: ethernet: ti: Fix mixed module-builtin object

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Message-ID: <80f7b668-8589-4f32-82ad-ecb895ec656f@ti.com>
Date:   Wed, 18 Oct 2023 09:59:03 +0530
From:   MD Danish Anwar <danishanwar@...com>
To:     Arnd Bergmann <arnd@...db.de>, Andrew Lunn <andrew@...n.ch>,
        Wolfram Sang <wsa+renesas@...g-engineering.com>,
        Simon Horman <horms@...nel.org>, Roger Quadros <rogerq@...com>,
        Vignesh Raghavendra <vigneshr@...com>,
        Paolo Abeni <pabeni@...hat.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Eric Dumazet <edumazet@...gle.com>,
        "David S . Miller" <davem@...emloft.net>
CC:     <linux-kernel@...r.kernel.org>, Netdev <netdev@...r.kernel.org>,
        <srk@...com>, <r-gunasekaran@...com>,
        Roger Quadros <rogerq@...nel.org>
Subject: Re: [EXTERNAL] Re: [PATCH net] net: ethernet: ti: Fix mixed
 module-builtin object

On 17/10/23 5:08 pm, Arnd Bergmann wrote:
> On Fri, Oct 13, 2023, at 13:10, MD Danish Anwar wrote:
>> On 13/10/23 16:08, Arnd Bergmann wrote:
>>> On Fri, Oct 13, 2023, at 12:05, MD Danish Anwar wrote:
>>>> With CONFIG_TI_K3_AM65_CPSW_NUSS=y and CONFIG_TI_ICSSG_PRUETH=m,
>>>> k3-cppi-desc-pool.o is linked to a module and also to vmlinux even though
>>>> the expected CFLAGS are different between builtins and modules.
>>>>
>>>> The build system is complaining about the following:
>>>>
>>>> k3-cppi-desc-pool.o is added to multiple modules: icssg-prueth
>>>> ti-am65-cpsw-nuss
>>>>
>>>> Introduce the new module, k3-cppi-desc-pool, to provide the common
>>>> functions to ti-am65-cpsw-nuss and icssg-prueth.
>>>>
>>>> Signed-off-by: MD Danish Anwar <danishanwar@...com>
>>>
>>> I submitted a different patch for this a while ago:
>>> https://lore.kernel.org/lkml/20230612124024.520720-3-arnd@kernel.org/
>>>
>>> I think I never sent a v2 of that, but I still have a
>>> working version in my local tree. I've replaced my version
>>> with yours for testing now, to see if you still need something
>>> beyond that.
>>>
>>
>> I see your patch addresses different modules. My patch introduces a new
>> module for k3-cppi-desc-pool which is used by both am65-cpsw-nuss and
>> icssg-prueth driver. Where as your patch addresses modules common across
>> different cpsw drivers (davinci-emac, cpsw, cpsw-switchdev, netcp,
>> netcp_ethss and am65-cpsw-nuss). So I think that both these patches are
>> addressing differet warnings.
> 
> Right, I can resend my patch (or Alexander Lobakin can rebase his version)
> after yours makes it in. Note that your patch introduces a warning about
> a missing license and description for the new module, so you should
> probably include this hunk:
> 

Sure Arnd, I'll add this and send v2.

> --- a/drivers/net/ethernet/ti/k3-cppi-desc-pool.c
> +++ b/drivers/net/ethernet/ti/k3-cppi-desc-pool.c
> @@ -131,3 +131,6 @@ size_t k3_cppi_desc_pool_avail(struct k3_cppi_desc_pool *pool)
>         return gen_pool_avail(pool->gen_pool) / pool->desc_size;
>  }
>  EXPORT_SYMBOL_GPL(k3_cppi_desc_pool_avail);
> +
> +MODULE_LICENSE("GPL");
> +MODULE_DESCRIPTION("TI K3 CPPI5 descriptors pool API");

-- 
Thanks and Regards,
Danish