Re: [PATCH 07/21] X86_64, UV: Disable Obsolete APIC ID fixup code used only on UV1

[Ingo Molnar]

* Mike Travis <tra...@sgi.com> wrote:

> +config X86_UV1_SUPPORTED
> +     bool "SGI Ultraviolet Series 1 Supported"
> +     depends on X86_UV

So I still think it's much simpler if we simply eliminate this Kconfig 
complication and have it all compatible. AFAICS the runtime impact on newer 
systems comes down mostly to a single unlikely branch:

>  static unsigned int x2apic_get_apic_id(unsigned long x)
>  {
> -     unsigned int id;
> +     if (likely(!uv1_apic_driver))
> +             return x;

Thanks,

        Ingo