Re: [patch 2/2] 8250_pnp: register x86 COM ports at the conventionalttyS names

[H. Peter Anvin]

Bjorn Helgaas wrote:
> > > +
> > Arguably, the right thing is to use the addresses present in the array 
> > at address 0x400.  In particular, COM3 and COM4 aren't always at those 
> > addresses.
>
> Wow.  I bow before your storehouse of x86 arcana :-)
>
> I guess you're referring to the "BIOS data area," which I'd never
> heard of before (but fortunately, Google knows).
>
> What would you think about doing this only for COM1 and COM2?  The
> only real value for doing this in the first place is so "console=ttyS0"
> always goes to COM1, even if we don't have SERIAL_PORT_DFNS.  User-
> space ought to use some sort of udev magic if it cares about persistent
> naming.

Well, there are four ports that the BIOS have slots for, and if so, we 
probably should use them.

	-hpa
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