linux-kernel - Re: [PATCH v2 1/2] powerpc/powermac: add missing g5_phy_disable

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Date:   Thu, 23 Sep 2021 15:32:03 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
To:     Michael Ellerman <mpe@...erman.id.au>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Rob Herring <robh+dt@...nel.org>,
        Frank Rowand <frowand.list@...il.com>,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        "Aneesh Kumar K.V" <aneesh.kumar@...ux.ibm.com>,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org
Subject: Re: [PATCH v2 1/2] powerpc/powermac: add missing
 g5_phy_disable_cpu1() declaration

On 23/09/2021 15:21, Michael Ellerman wrote:
> Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com> writes:
>> g5_phy_disable_cpu1() is used outside of platforms/powermac/feature.c,
>> so it should have a declaration to fix W=1 warning:
>>
>>   arch/powerpc/platforms/powermac/feature.c:1533:6:
>>     error: no previous prototype for ‘g5_phy_disable_cpu1’ [-Werror=missing-prototypes]
>>
>> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
>>
>> ---
>>
>> Changes since v1:
>> 1. Drop declaration in powermac/smp.c
> 
> Sorry I missed v1, so I'm going to ask for more changes :}
> 
>>  arch/powerpc/include/asm/pmac_feature.h | 4 ++++
> 
> Putting it here exposes it to the whole kernel, but it's only needed
> inside arch/powerpc/platforms/powermac.
> 
> The right place for the prototype is arch/powerpc/platforms/powermac/pmac.h,
> which is for platform internal prototypes.

I'll fix it up.

> 
>>  arch/powerpc/platforms/powermac/smp.c   | 2 --
>>  2 files changed, 4 insertions(+), 2 deletions(-)
>>
>> diff --git a/arch/powerpc/include/asm/pmac_feature.h b/arch/powerpc/include/asm/pmac_feature.h
>> index e08e829261b6..7703e5bf1203 100644
>> --- a/arch/powerpc/include/asm/pmac_feature.h
>> +++ b/arch/powerpc/include/asm/pmac_feature.h
>> @@ -143,6 +143,10 @@
>>   */
>>  struct device_node;
>>  
>> +#ifdef CONFIG_PPC64
>> +void g5_phy_disable_cpu1(void);
>> +#endif /* CONFIG_PPC64 */
> 
> The ifdef around the prototype doesn't gain much, and is extra visual
> noise, so I'd rather without it.


Sure.


Best regards,
Krzysztof