linux-kernel - Re: [PATCH v6 6/6] pci: Add support for creating a generic host

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Date:	Tue, 11 Mar 2014 07:50:24 +0100
From:	Arnd Bergmann <arnd@...db.de>
To:	linux-arm-kernel@...ts.infradead.org
Cc:	Liviu Dudau <liviu@...au.co.uk>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	linaro-kernel <linaro-kernel@...ts.linaro.org>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	linux-pci <linux-pci@...r.kernel.org>,
	Liviu Dudau <Liviu.Dudau@....com>,
	LKML <linux-kernel@...r.kernel.org>,
	Will Deacon <Will.Deacon@....com>,
	Tanmay Inamdar <tinamdar@....com>,
	Catalin Marinas <Catalin.Marinas@....com>,
	Bjorn Helgaas <bhelgaas@...gle.com>
Subject: Re: [PATCH v6 6/6] pci: Add support for creating a generic host_bridge from device tree

On Monday 10 March 2014 21:56:00 Liviu Dudau wrote:
> 
> PCI_IOBASE is always defined. See the discussion with Russell on this subject.
> 
> include/asm-generic/io.h has at line 118:
> 
> #ifndef PCI_IOBASE
> #define PCI_IOBASE ((void __iomem *) 0)
> #endif

That is only defined for those that use asm-generic/pci.h, which most architectures
don't.
 
> I will go with my idea tomorrow. arm64 overwrite the implementation anyway, I
> find it cleaner rather than having to do #ifdefs and/or ifs.

I'd really hope we can get to a point where arm64 doesn't need any architecture
specific code for this. It doesn't do anything special.

	Arnd
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