Re: [PATCH 2/4] x86_64 boot -v2: Add linked list of struct setup_data

[H. Peter Anvin]

Paul Jackson wrote:
> Huang wrote:
> > On Sat, 2008-03-29 at 23:31 -0500, Paul Jackson wrote:
> > > Huang wrote:
> > > > +/* setup data types */
> > > > +#define SETUP_NONE			0
> > > This define seems unused?
> > I think this can prevent somebody to use 0 as type id.
>
> Why is it a good idea to prevent a 0 type id?

It is usually handy to have an ID to use as ignore, or not present, and 
for that to be zero.

	-hpa
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