Re: [PATCH] x86, pci-hotplug, calgary / rio: fix EBDA ioremap()

[Ingo Molnar]

* Arjan van de Ven <arjan@xxxxxxxxxxxxxxx> wrote:

>>>
>>> mapping the EBDA is rather ... un-nice from that driver, so i guess  
>>> you check does the right thing in flagging possible crap.
>>
>> it does:
>>
>>     addr:  0x9f800
>>      end:  0xaf5e7
>> p->start:  0x9f800
>>   p->end:  0x9ffff
>>
>> resources are laid out like this:
>>
>>   0009f800-0009ffff : reserved
>>   000a0000-000bffff : Video RAM area
>>
>> so the driver over-maps into the Video RAM...
>
> ... and makes that uncachable (while it probably was WC before)

ah, neat angle, i did not consider that. One more entry into the '10 
good reasons why ioremap-ing RAM is bad' list.

	Ingo
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