linux-kernel - Re: Linux 5.16-rc3

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Message-ID: <CAMhs-H_drYWiiJVbLQYPqfEHF=DM-yCg1bwVZMCqdqHOUACyWQ@mail.gmail.com>
Date:   Wed, 1 Dec 2021 22:38:08 +0100
From:   Sergio Paracuellos <sergio.paracuellos@...il.com>
To:     Guenter Roeck <linux@...ck-us.net>
Cc:     Bjorn Helgaas <helgaas@...nel.org>,
        Randy Dunlap <rdunlap@...radead.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        linux-pci <linux-pci@...r.kernel.org>
Subject: Re: Linux 5.16-rc3

On Wed, Dec 1, 2021 at 9:50 PM Guenter Roeck <linux@...ck-us.net> wrote:
>
> On 12/1/21 12:38 PM, Bjorn Helgaas wrote:
> > [+cc linux-pci]
> >
> > On Mon, Nov 29, 2021 at 01:18:12PM +0100, Sergio Paracuellos wrote:
> >> On Mon, Nov 29, 2021 at 5:17 AM Guenter Roeck <linux@...ck-us.net> wrote:
> >>> On 11/28/21 7:07 PM, Randy Dunlap wrote:
> >>>> On 11/28/21 17:59, Guenter Roeck wrote:
> >>>>> ...
> >>>>> 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.
> >
> > Can we do a minimal patch along the lines of the above for v5.16?
> >
>
> I would suggest to either do that or, if module support is mandatory,
> revert the patch and re-apply it if and when it can be built as module.

Understood. Let's apply a simple fix for 5.16 and a real fix for 5.17.

I have just sent:
https://lore.kernel.org/linux-pci/20211201213402.22802-1-sergio.paracuellos@gmail.com/T/#u

Best regards,
    Sergio Paracuellos
>
> Guenter