linux-kernel - Re: [PATCH] include/linux/vfio.h: Guard powerpc-specific functions with CONFIG_VFIO_SPAPR

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Date:   Thu, 8 Jun 2017 09:45:47 -0300
From:   Murilo Opsfelder Araújo <mopsfelder@...il.com>
To:     Michael Ellerman <mpe@...erman.id.au>,
        Alexey Kardashevskiy <aik@...abs.ru>,
        kbuild test robot <lkp@...el.com>
Cc:     kbuild-all@...org, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org, Alex Williamson <alex.williamson@...hat.com>,
        linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH] include/linux/vfio.h: Guard powerpc-specific functions
 with CONFIG_VFIO_SPAPR_EEH

On 06/08/2017 08:41 AM, Michael Ellerman wrote:
> Alexey Kardashevskiy <aik@...abs.ru> writes:
> 
>> Hi,
>>
>> How did you manage to have CONFIG_EEH=y and CONFIG_VFIO_SPAPR_EEH=n? "make
>> oldconfig" fixes this to CONFIG_VFIO_SPAPR_EEH=y.
> 
> Hmm, Murilo did you confirm the bug still happens on upstream with that
> rand config?

Yes, it's still happening with next-20170607.

For me, `make oldconfig` hasn't changed it to CONFIG_VFIO_SPAPR_EEH=y. See:

    $ git clean -dfxq
    $ git reset --hard origin/master
    HEAD is now at 8d1b80c Add linux-next specific files for 20170607

    $ curl http://kisskb.ellerman.id.au/kisskb/buildresult/12982362/config/ -o .config
    $ grep -E 'EEH|SPAPR' .config
    CONFIG_EEH=y
    # CONFIG_SPAPR_TCE_IOMMU is not set

    $ yes '' | make oldconfig

    $ grep -E 'EEH|SPAPR' .config
    CONFIG_EEH=y
    # CONFIG_SPAPR_TCE_IOMMU is not set

    $ make -j 160 ARCH=powerpc
    ...
    drivers/vfio/pci/vfio_pci.o: In function `.vfio_pci_release':
    vfio_pci.c:(.text+0xa98): undefined reference to `.vfio_spapr_pci_eeh_release'
    drivers/vfio/pci/vfio_pci.o: In function `.vfio_pci_open':
    vfio_pci.c:(.text+0x1420): undefined reference to `.vfio_spapr_pci_eeh_open'
    make: *** [vmlinux] Error 1

-- 
Murilo