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Subject: Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern AMD64
 with MCP51 laptops
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> Yes, it's now clear that all of this is so.  Regrettably, it's used in 
> dozens of drivers, most having nothing to do with an ISA/LPC bus.
> 
> If it really is specific to the ISA architecture, then it should only be 
> used in architecture specific code.

ISA/LPC is not architecture specific. In fact ISA/LPC bus components get
everywhere because the PC market drives the cost per unit for those
components down to nearly nothing.