linux-kernel - Re: [PATCH] powerpc: fix AKEBONO build failures

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Date:   Fri, 22 Jan 2021 12:14:23 +1100
From:   Michael Ellerman <mpe@...erman.id.au>
To:     Randy Dunlap <rdunlap@...radead.org>,
        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>,
        linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH] powerpc: fix AKEBONO build failures

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?

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

cheers


diff --git a/arch/powerpc/configs/44x/akebono_defconfig b/arch/powerpc/configs/44x/akebono_defconfig
index 3894ba8f8ffc..6b08a85f4ce6 100644
--- a/arch/powerpc/configs/44x/akebono_defconfig
+++ b/arch/powerpc/configs/44x/akebono_defconfig
@@ -21,6 +21,7 @@ CONFIG_IRQ_ALL_CPUS=y
 # CONFIG_COMPACTION is not set
 # CONFIG_SUSPEND is not set
 CONFIG_NET=y
+CONFIG_NETDEVICES=y
 CONFIG_PACKET=y
 CONFIG_UNIX=y
 CONFIG_INET=y
@@ -98,6 +99,8 @@ CONFIG_USB_OHCI_HCD=y
 # CONFIG_USB_OHCI_HCD_PCI is not set
 CONFIG_USB_STORAGE=y
 CONFIG_MMC=y
+CONFIG_MMC_SDHCI=y
+CONFIG_MMC_SDHCI_PLTFM=y
 CONFIG_RTC_CLASS=y
 CONFIG_RTC_DRV_M41T80=y
 CONFIG_EXT2_FS=y
diff --git a/arch/powerpc/platforms/44x/Kconfig b/arch/powerpc/platforms/44x/Kconfig
index 78ac6d67a935..509b329c112f 100644
--- a/arch/powerpc/platforms/44x/Kconfig
+++ b/arch/powerpc/platforms/44x/Kconfig
@@ -206,15 +206,10 @@ config AKEBONO
        select PPC4xx_HSTA_MSI
        select I2C
        select I2C_IBM_IIC
-       select NETDEVICES
-       select ETHERNET
-       select NET_VENDOR_IBM
        select IBM_EMAC_EMAC4 if IBM_EMAC
        select USB if USB_SUPPORT
        select USB_OHCI_HCD_PLATFORM if USB_OHCI_HCD
        select USB_EHCI_HCD_PLATFORM if USB_EHCI_HCD
-       select MMC_SDHCI
-       select MMC_SDHCI_PLTFM
        select ATA
        select SATA_AHCI_PLATFORM
        help