linux-kernel - Re: [PATCH v2] powerpc/powernv/pci: use ifdef to avoid dead code

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Date:   Mon, 20 Jul 2020 11:15:59 +1000
From:   "Oliver O'Halloran" <oohall@...il.com>
To:     Greg Thelen <gthelen@...gle.com>
Cc:     Michael Ellerman <mpe@...erman.id.au>,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] powerpc/powernv/pci: use ifdef to avoid dead code

On Sun, Jul 19, 2020 at 5:13 AM Greg Thelen <gthelen@...gle.com> wrote:
>
> Oliver O'Halloran <oohall@...il.com> wrote:
>
> > On Mon, Jun 15, 2020 at 9:33 AM Greg Thelen <gthelen@...gle.com> wrote:
> >>
> >> Commit dc3d8f85bb57 ("powerpc/powernv/pci: Re-work bus PE
> >> configuration") removed a couple pnv_ioda_setup_bus_dma() calls.  The
> >> only remaining calls are behind CONFIG_IOMMU_API.  Thus builds without
> >> CONFIG_IOMMU_API see:
> >>   arch/powerpc/platforms/powernv/pci-ioda.c:1888:13: error: 'pnv_ioda_setup_bus_dma' defined but not used
> >>
> >> Move pnv_ioda_setup_bus_dma() under CONFIG_IOMMU_API to avoid dead code.
> >
> > Doh! Thanks for the fix.
> >
> > Reviewed-by: Oliver O'Halloran <oohall@...il.com>
>
> Is there anything else needed from me on this patch?
> Given that it fixes a 5.8 commit I figured it'd be 5.8 material.

Oh sorry, I completely forgot about this patch. I sent another series
that included a more-or-less identical fix after the kbuild robot sent
a reminder:

http://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=187630&state=*

That's current in powerpc/next, but if it's causing a build break then
I agree it should probably go into 5.8 too.

Oliver