linux-kernel - Re: linux-next: Tree for Jun 2 (arch/powerpc/kernel/iommu.c)

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Date:   Sun, 4 Jun 2023 14:55:32 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Timothy Pearson <tpearson@...torengineering.com>,
        Michael Ellerman <mpe@...erman.id.au>
Cc:     Stephen Rothwell <sfr@...b.auug.org.au>,
        Linux Next Mailing List <linux-next@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>,
        Alexey Kardashevskiy <aik@...abs.ru>
Subject: Re: linux-next: Tree for Jun 2 (arch/powerpc/kernel/iommu.c)



On 6/3/23 20:57, Timothy Pearson wrote:
> 
> 
> ----- Original Message -----
>> From: "Michael Ellerman" <mpe@...erman.id.au>
>> To: "Randy Dunlap" <rdunlap@...radead.org>, "Stephen Rothwell" <sfr@...b.auug.org.au>, "Linux Next Mailing List"
>> <linux-next@...r.kernel.org>
>> Cc: "linux-kernel" <linux-kernel@...r.kernel.org>, "linuxppc-dev" <linuxppc-dev@...ts.ozlabs.org>, "Alexey
>> Kardashevskiy" <aik@...abs.ru>, "Timothy Pearson" <tpearson@...torengineering.com>
>> Sent: Saturday, June 3, 2023 7:22:51 PM
>> Subject: Re: linux-next: Tree for Jun 2 (arch/powerpc/kernel/iommu.c)
> 
>> Randy Dunlap <rdunlap@...radead.org> writes:
>>> On 6/1/23 21:01, Stephen Rothwell wrote:
>>>> Hi all,
>>>>
>>>> Changes since 20230601:
>>>>
>>>
>>> On powerpc64, a randconfig failed with:
>>>
>>> In file included from ../include/linux/list.h:5,
>>>                  from ../include/linux/preempt.h:11,
>>>                  from ../include/linux/spinlock.h:56,
>>>                  from ../include/linux/mmzone.h:8,
>>>                  from ../include/linux/gfp.h:7,
>>>                  from ../include/linux/slab.h:15,
>>>                  from ../arch/powerpc/kernel/iommu.c:15:
>>> ../arch/powerpc/kernel/iommu.c: In function
>>> 'spapr_tce_setup_phb_iommus_initcall':
>>> ../arch/powerpc/kernel/iommu.c:1391:36: error: 'hose_list' undeclared (first use
>>> in this function); did you mean 'zonelist'?
>>>  1391 |         list_for_each_entry(hose, &hose_list, list_node) {
>>>       |                                    ^~~~~~~~~
>> ...
>>
>> hose_list is in pci-common.c which is built when PCI=y.
>>
>> PSERIES and POWERNV force PCI=y.
>>
>> But this config has neither:
>>
>> # CONFIG_PPC_POWERNV is not set
>> # CONFIG_PPC_PSERIES is not set
>> CONFIG_HAVE_PCI=y
>> # CONFIG_PCI is not set
>> # CONFIG_COMMON_CLK_RS9_PCIE is not set
>>
>>
>> Probably the spapr_tce code should be wrapped in an #ifdef that is only
>> enabled when POWERNV || PSERIES is enabled.
>>
>> cheers
> 
> Sounds reasonable, I was going to look into this further over the weekend.  I can put together a patch for Monday if that works?

Works for me. Go for it.
Thanks.

-- 
~Randy