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Re: [PATCH] I/O helpers rework

Subject: Re: [PATCH] I/O helpers rework
From: Atsushi Nemoto <>
Date: Tue, 11 Jan 2005 09:53:11 +0900 (JST)
In-reply-to: <>
Original-recipient: rfc822;
References: <> <> <>
>>>>> On Mon, 10 Jan 2005 18:11:14 +0000 (GMT), "Maciej W. Rozycki" 
>>>>> <> said:
>> Well, maybe the 'volatile' have no sense, but some archs (including
>> i386, of course :-)) and some drivers use it.  Adding the
>> 'volatile' will remove some compiler warnings.

macro>  As will removing "volatile" from broken ports.


>> And I have some custom boards which really needs different swapping
>> properties (PCI regions need SWAP_IO_SPACE, but ISA region does
>> not, for example).  I agree that those boards were misdesigned but
>> I want to run Linux on it without modifying existing drivers.

macro>  Hmm, that's strange -- does the system glue ISA otherwise than
macro> behind a PCI-ISA bridge?  So far I've only spotted a single
macro> PCI/ISA system wiring the buses as "peers", namely the ancient
macro> Intel's i82420EX for 486-class processors.

Yes.  The system have ISA devices connected via local bus (like ROMs).
Also I have an another system which have two PCI controllers with
different endian conversion (what mad hardware!).

Atsushi Nemoto

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