Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern AMD64with MCP51 laptops

[Alan Cox]

> In any case, my machine does not have an ISA bus.  Why should it?  It's 
> a laptop!

Yes it does. The branding spec said "No ISA bus" so it was renamed "LPC"
and hidden internally, but its alive and well.

> has already serviced the bus and delivered data!  Why put many 
> microseconds into the bus, locking out other ISA transactions (and PCI 
> maybe too) with an out to port 80?

Historically processors didn't have a high precision time source so it
was the normal way to do it on all PC operating systems

> Some of the code in linux is really nice, really clean, really 
> well-thought out.  Some is ... well, I'm not trolling for a fight.

Like all things, it doesn't always age well 8)
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