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From: Randy Dunlap <rdunlap@infradead.org>
To: Christoph Hellwig <hch@infradead.org>
Cc: linux-kernel@vger.kernel.org, kernel test robot <lkp@intel.com>,
	Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
	Paul Burton <paulburton@kernel.org>,
	linux-mips@vger.kernel.org, Bjorn Helgaas <bhelgaas@google.com>,
	linux-pci@vger.kernel.org, Lee Jones <lee.jones@linaro.org>,
	Thomas Bogendoerfer <tbogendoerfer@suse.de>
Subject: Re: [PATCH] PCI: export pci_find_host_bridge() to fix MFD build error
Date: Tue, 20 Oct 2020 08:51:33 -0700	[thread overview]
Message-ID: <84b55881-21ba-aa5b-7b56-7d8e411771f9@infradead.org> (raw)
In-Reply-To: <45b16450-320b-86fd-603e-4fb311c6f4bd@infradead.org>

On 10/20/20 7:06 AM, Randy Dunlap wrote:
> On 10/20/20 1:02 AM, 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.
>>
> 
> Thanks for commenting. and I am not surprised.
> 
> Adding Cc: for Thomas and Lee.

BTW, if someone wants to use the MFD ioc3 driver now,
without any source code patches, they can just build it in
(SGI_MFD_IOC3=y) instead of building it as a loadable module.

It builds successfully and can use pci_find_host_bridge().
pci_find_host_bridge() just isn't exported for loadable modules.

So this could be useful (PCI=y):

config SGI_MFD_IOC3
	tristate "SGI IOC3 core driver"
	depends on PCI=y && MIPS && 64BIT
	select MFD_CORE

-- 
~Randy


  reply	other threads:[~2020-10-20 15:51 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-19  6:14 Randy Dunlap
2020-10-20  8:02 ` Christoph Hellwig
2020-10-20 14:06   ` Randy Dunlap
2020-10-20 15:51     ` Randy Dunlap [this message]
2020-10-20 16:04       ` Randy Dunlap
2020-10-21 10:08   ` Thomas Bogendoerfer
2020-10-23  6:47     ` Christoph Hellwig

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