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Date:   Sat, 30 Jan 2021 15:21:55 -0800
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Michael Ellerman <mpe@...erman.id.au>,
        Yury Norov <yury.norov@...il.com>,
        linuxppc-dev@...ts.ozlabs.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Cc:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>
Subject: Re: [PATCH] powerpc: fix AKEBONO build failures

On 1/21/21 5:14 PM, Michael Ellerman wrote:
> Randy Dunlap <rdunlap@...radead.org> writes:
>> On 1/20/21 1:29 PM, Yury Norov wrote:
>>> Hi all,
>>>
>>> I found the power pc build broken on today's
>>> linux-next (647060f3b592).
>>
>> Darn, I was building linux-5.11-rc4.
>>
>> I'll try linux-next after I send this.
>>
>> ---
>> From: Randy Dunlap <rdunlap@...radead.org>
>>
>> Fulfill AKEBONO Kconfig requirements.
>>
>> Fixes these Kconfig warnings (and more) and fixes the subsequent
>> build errors:
>>
>> WARNING: unmet direct dependencies detected for NETDEVICES
>>    Depends on [n]: NET [=n]
>>    Selected by [y]:
>>    - AKEBONO [=y] && PPC_47x [=y]
>>
>> WARNING: unmet direct dependencies detected for MMC_SDHCI
>>    Depends on [n]: MMC [=n] && HAS_DMA [=y]
>>    Selected by [y]:
>>    - AKEBONO [=y] && PPC_47x [=y]
>>
>> Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
>> Cc: Michael Ellerman <mpe@...erman.id.au>
>> Cc: Benjamin Herrenschmidt <benh@...nel.crashing.org>
>> Cc: Paul Mackerras <paulus@...ba.org>
>> Cc: linuxppc-dev@...ts.ozlabs.org
>> Cc: Yury Norov <yury.norov@...il.com>
>> ---
>>   arch/powerpc/platforms/44x/Kconfig |    2 ++
>>   1 file changed, 2 insertions(+)
>>
>> --- lnx-511-rc4.orig/arch/powerpc/platforms/44x/Kconfig
>> +++ lnx-511-rc4/arch/powerpc/platforms/44x/Kconfig
>> @@ -206,6 +206,7 @@ config AKEBONO
>>   	select PPC4xx_HSTA_MSI
>>   	select I2C
>>   	select I2C_IBM_IIC
>> +	select NET
>>   	select NETDEVICES
>>   	select ETHERNET
>>   	select NET_VENDOR_IBM
> 
> I think the problem here is too much use of select, for things that
> should instead be in the defconfig.
> 
> The patch below results in the same result for make
> 44x/akebono_defconfig. Does it fix the original issue?

Hi Michael,
Sorry for the delay.

Changing the akebono_defconfig doesn't cause the missing symbols
to be set -- the defconfig is not being used here.

I guess that if you have users who set CONFIG_AKEBONO and expect
it to build cleanly, you will need something like my patch or the
patch that Florian just posted.

Changing the akebono_defconfig also would not help 'make randconfig'
builds to build cleanly if they had happened to enable AKEBONO.


> We don't need to add ETHERNET or NET_VENDOR_IBM to the defconfig because
> they're both default y.
> 
> cheers

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