Re: [PATCH] Use x2apic_supported() in the default_apic_id_valid() function.

[Yinghai Lu]

On Thu, Mar 15, 2012 at 11:03 AM, Steffen Persvold <sp@xxxxxxxxxxxxx> wrote:
> Use x2apic_supported() in the default_apic_id_valid() function. If x2apic mode is disabled (via nox2apic for example), x2apic_supported() will return false.
>
> This allows us to substitute the check in arch/x86/kernel/acpi/boot.c::acpi_parse_x2apic and avoid feigning the x2apic cpu feature in the NumaChip apic code.
>
> Signed-off-by: Steffen Persvold <sp@xxxxxxxxxxxxx>
> Reviewed-by: Daniel J Blueman <daniel@xxxxxxxxxxxxxxxxxx>

I double checked on system with x2apic preenabled,
nox2apic in boot command line still works well and it
skips starting APs with apic id > 255.

Acked-by: Yinghai Lu <yinghai@xxxxxxxxxx>
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