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From: Pierre Ossman <>
To: Christoph Hellwig <>
Cc: Geert Uytterhoeven <>,
	LKML <>,
Subject: Re: [Wbsd-devel] [PATCH 540] MMC_WBSD depends on ISA
Date: Sat, 29 Jan 2005 17:27:46 +0100	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

Christoph Hellwig wrote:

>On Sat, Jan 29, 2005 at 05:08:32PM +0100, Pierre Ossman wrote:
>>For i386 and x86_64 it's defined as virt_to_phys in asm/io.h without any 
>>#ifdef:s protecting it.
>Not all the world is a PC
Then the dependency should in that case be on architectures. It is 
connected similar to a floppy (which is not dependent on ISA and uses 

The point is that isa_virt_to_bus() is the method used by devices 
connected in the same way. This works on the platforms where the device 
can be found (i386 and x86_64). We can not make it dependent on ISA 
since you cannot enable ISA on all platforms where it exists (i.e. 
x86_64). Either fix that or make the driver depend on architecture the 
same way floppy does.

Using the generic DMA API might be a viable option now that x86_64 seems 
to be fixed. But it doesn't have a good track record so I'm not prepared 
to commit any changes until I have time to properly test it. There might 
still be assumptions about PCI lurking around.


  reply	other threads:[~2005-01-29 16:27 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-01-07 22:50 [PATCH 540] MMC_WBSD depends on ISA Geert Uytterhoeven
2005-01-10  7:14 ` [Wbsd-devel] " Pierre Ossman
2005-01-29 13:37   ` Pierre Ossman
2005-01-29 13:57     ` Christoph Hellwig
2005-01-29 14:54       ` Russell King
2005-01-29 15:00         ` Christoph Hellwig
2005-01-29 15:13           ` Russell King
2005-01-29 15:16             ` Christoph Hellwig
2005-01-29 15:31           ` Pierre Ossman
2005-01-29 15:57             ` Christoph Hellwig
2005-01-29 16:08               ` Pierre Ossman
2005-01-29 16:13                 ` Christoph Hellwig
2005-01-29 16:27                   ` Pierre Ossman [this message]
2005-01-30  9:37             ` Geert Uytterhoeven

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