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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <2664356.LLPHGvlG5M@wuerfel>
Date:	Tue, 11 Mar 2014 11:43:39 +0100
From:	Arnd Bergmann <arnd@...db.de>
To:	linux-arm-kernel@...ts.infradead.org
Cc:	Liviu Dudau <Liviu.Dudau@....com>, Liviu Dudau <liviu@...au.co.uk>,
	linaro-kernel <linaro-kernel@...ts.linaro.org>,
	Catalin Marinas <Catalin.Marinas@....com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	linux-pci <linux-pci@...r.kernel.org>,
	Will Deacon <Will.Deacon@....com>,
	LKML <linux-kernel@...r.kernel.org>,
	Tanmay Inamdar <tinamdar@....com>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Bjorn Helgaas <bhelgaas@...gle.com>
Subject: Re: [PATCH v6 6/6] pci: Add support for creating a generic host_bridge from device tree

On Tuesday 11 March 2014 09:46:41 Liviu Dudau wrote:
> On Tue, Mar 11, 2014 at 06:50:24AM +0000, Arnd Bergmann wrote:
> > 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 think it is defined for anyone that #includes <asm-generic/io.h>. There is no other
> #ifdef around that.
> 

My mistake, I meant to write asm-generic/io.h.

On a related note, I would actually prefer to get rid of this PCI_IOBASE
default and move it into the architectures that really want it like this.
The default when PCI_IOBASE is not set IMHO should be to also not provide
inb/outb and ioport_map() helpers, but we need a little more infrastructure
to actually make the kernel build in all valid configuration when we remove them.

	Arnd
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/