linux-kernel - Re: [PATCH] PCI: export pci_find_host

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Message-ID: <20201021100844.GA3693@alpha.franken.de>
Date:   Wed, 21 Oct 2020 12:08:45 +0200
From:   Thomas Bogendoerfer <tsbogend@...ha.franken.de>
To:     Christoph Hellwig <hch@...radead.org>
Cc:     Randy Dunlap <rdunlap@...radead.org>, linux-kernel@...r.kernel.org,
        kernel test robot <lkp@...el.com>,
        Paul Burton <paulburton@...nel.org>,
        linux-mips@...r.kernel.org, Bjorn Helgaas <bhelgaas@...gle.com>,
        linux-pci@...r.kernel.org
Subject: Re: [PATCH] PCI: export pci_find_host_bridge() to fix MFD build error

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.

Thomas.

-- 
Crap can work. Given enough thrust pigs will fly, but it's not necessarily a
good idea.                                                [ RFC1925, 2.3 ]