Re: [PATCH] PCI: export pci_find_host_bridge() to fix MFD build error

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On Wed, Oct 21, 2020 at 12:08:45PM +0200, Thomas Bogendoerfer wrote:
> On Tue, Oct 20, 2020 at 09:02:19AM +0100, Christoph Hellwig wrote:
> > On Sun, Oct 18, 2020 at 11:14:53PM -0700, Randy Dunlap wrote:
> > > Fix a build error in drivers/mfd/ioc.o by exporting
> > > pci_find_host_bridge().
> > > 
> > > ERROR: modpost: "pci_find_host_bridge" [drivers/mfd/ioc3.ko] undefined!
> > 
> > I think the mfd code should be fixed to not depend on such an internal
> > symbol instead.
> 
> are you talking about the EXPORT_SYMBOL or the usage of
> pci_find_host_bridge() outside of drivers/pci ? If the latter the
> function is used in arm/arm64 code and pci controller code... so
> I doesn't look like a pure internal symbol to me.

All of those are built-in and related bits aren't exported at all, or
at best EXPORT_SYMBOL_GPL.  I think just not allowing the ioc3 mfd to
be built modular might be the easiest fix here.  Especially as for IP27
and co kernel it is everything but optional anyway.



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