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Date:	Tue, 22 Jul 2014 19:29:35 +0800
From:	Chen Gang <>
To:	Arnd Bergmann <>
CC:	Lennox Wu <>,
	Richard Weinberger <>,
	Lars-Peter Clausen <>,
	Guenter Roeck <>,
	Greg Kroah-Hartman <>,
	Dmitry Torokhov <>,,
	Benjamin Herrenschmidt <>,
	Tom Gundersen <>,
	Thierry Reding <>,
	Marek Vasut <>,
	Liqin Chen <>,,,,,,
	"" <>,, Martin Schwidefsky <>,, Geert Uytterhoeven <>,,
Subject: Re: [PATCH] drivers: Let several drivers depends on HAS_IOMEM for

On 07/22/2014 06:32 PM, Arnd Bergmann wrote:
> On Sunday 20 July 2014 17:45:40 Chen Gang wrote:
>>> Next, I shall:
>>>  - Remove HAS_IOMEM and NO_IOMEM from kernel, firstly.
>>>  - Try to make dummy IOMEM functions for score architecture.
>>>  - Continue discussing with UML for it.
>> Oh, sorry, I forgot, after remove IOMEM from kernel, also s390 and tile
>> need implement dummy IOMEM if !PCI.
>> If possible, I shall try to implement the dummy IOMEM in 'asm-generic',
>> and let uml, score, s390 and tile use them when they need.
> Sorry for going round in circles, but looking back at the original patches,
> adding the extra 'depends on HAS_IOMEM' does seem much better than the
> other suggestions that came afterwards.
> In particular, removing HAS_IOMEM and NO_IOMEM sounds like an awful idea
> to me. I'd rather add a HAS_IOPORT in addition to also catch architectures
> that have no support for PC-style PIO.

Welcome any other members (especially driver members) ideas and
suggestions -- driver members and architecture members have different
tastes and different roles.

For me, if no additional reply, I prefer to keep current status, and
still add 'depends on HAS_IOMEM' for each driver which need it, but I am
not sure whether driver members can bear it.

Chen Gang

Open, share, and attitude like air, water, and life which God blessed
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