linux-kernel - Re: Linux 5.16-rc3

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Date:   Sun, 28 Nov 2021 20:17:33 -0800
From:   Guenter Roeck <linux@...ck-us.net>
To:     Randy Dunlap <rdunlap@...radead.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Sergio Paracuellos <sergio.paracuellos@...il.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Bjorn Helgaas <bhelgaas@...gle.com>
Subject: Re: Linux 5.16-rc3

On 11/28/21 7:07 PM, Randy Dunlap wrote:
> 
> 
> On 11/28/21 17:59, Guenter Roeck wrote:
>> On Sun, Nov 28, 2021 at 02:21:20PM -0800, Linus Torvalds wrote:
>>> So rc3 is usually a bit larger than rc2 just because people had some
>>> time to start finding things.
>>>
>>> So too this time, although it's not like this is a particularly big
>>> rc3. Possibly partly due to the past week having been Thanksgiving
>>> week here in the US. But the size is well within the normal range, so
>>> if that's a factor, it's not been a big one.
>>>
>>> The diff for rc3 is mostly drivers, although part of that is just
>>> because of the removal of a left-over MIPS Netlogic driver which makes
>>> the stats look a bit wonky, and is over a third of the whole diff just
>>> in itself.
>>>
>>> If you ignore that part, the statistics look a bit more normal, but
>>> drivers still dominate (network drivers, sound and gpu are the big
>>> ones, but there is noise all over). Other than that there's once again
>>> a fair amount of selftest (mostly networking), along with core
>>> networking, some arch updates - the bulk of it from a single arm64
>>> uaccess patch, although that's mostly because it's all pretty small -
>>> and random other changes.
>>>
>>> Full shortlog below.
>>>
>>> Please test,
>>>
>>
>> Build results:
>>     total: 153 pass: 152 fail: 1
>> Failed builds:
>>     mips:allmodconfig
>> Qemu test results:
>>     total: 482 pass: 482 fail: 0
>>
>> Building mips:allmodconfig ... failed
>> --------------
>> Error log:
>> ERROR: modpost: missing MODULE_LICENSE() in drivers/pci/controller/pcie-mt7621.o
>> ERROR: modpost: "mips_cm_unlock_other" [drivers/pci/controller/pcie-mt7621.ko] undefined!
>> ERROR: modpost: "mips_cpc_base" [drivers/pci/controller/pcie-mt7621.ko] undefined!
>> ERROR: modpost: "mips_cm_lock_other" [drivers/pci/controller/pcie-mt7621.ko] undefined!
>> ERROR: modpost: "mips_cm_is64" [drivers/pci/controller/pcie-mt7621.ko] undefined!
>> ERROR: modpost: "mips_gcr_base" [drivers/pci/controller/pcie-mt7621.ko] undefined!
>>
>> There is still no fix for the mips:allmodconfig build problem as far
>> as I can see. It is a bit odd, because the fix would be as simple as
>>
>>   config PCIE_MT7621
>> -    tristate "MediaTek MT7621 PCIe Controller"
>> -    depends on (RALINK && SOC_MT7621) || (MIPS && COMPILE_TEST)
>> +    bool "MediaTek MT7621 PCIe Controller"
>> +    depends on SOC_MT7621 || (MIPS && COMPILE_TEST)
>>       select PHY_MT7621_PCI
>>       default SOC_MT7621
>>       help
>>
>> Context: tristate doesn't make sense here because both RALINK and
>> SOC_MT7621 are bool. Also, RALINK is redundant because SOC_MT7621
>> already depends on it. The compile failure is due to missing exported
>> symbols, and it is only seen if PCIE_MT7621=m - which is only possible
>> if COMPILE_TEST=y. In other words, the dependencies above are set such
>> that test builds, and only test builds, fail.
>>
>> The problem was introduced with commit 2bdd5238e756 ("PCI: mt7621:
>> Add MediaTek MT7621 PCIe host controller driver"). Copying some of
>> those responsible to see if we can expect a solution sometime soon.
> 
> 
> I sent a patch for this a couple of weeks ago and Sergio replied to it
> here:
> 
> https://lore.kernel.org/linux-pci/CAMhs-H8TA0S23FjSRKGKeKAWWdUxET6YnivLQoFuy_fSVJOPXw@mail.gmail.com/
> 
> saying that is a different patch out there but that it had not
> been reviewed yet.
> 

All proposals I have seen assume that PCIE_MT7621=m. As I said, I think
that it is pointless to do that because the driver can only be built
as module if COMPILE_TEST=y. We should not [have to] export symbols
because of that.

Guenter