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ACPI: processor: introduce arch_has_acpi_pdc

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arch dependent helper function that tells us if we should attempt to
evaluate _PDC on this machine or not.

The x86 implementation assumes that the CPUs in the machine must be
homogeneous, and that you cannot mix CPUs of different vendors.

Cc: Tony Luck <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: "H. Peter Anvin" <[email protected]>
Signed-off-by: Alex Chiang <[email protected]>
Signed-off-by: Len Brown <[email protected]>
This commit is contained in:
Alex Chiang 2009-12-20 12:19:14 -07:00 • committed by Len Brown
commit 1d9cb470a7
4 changed files with 13 additions and 3 deletions
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3
drivers/acpi/processor_pdc.c
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@ -69,6 +69,9 @@ static int acpi_processor_eval_pdc(struct acpi_processor *pr)
void acpi_processor_set_pdc(struct acpi_processor *pr)
{
if (arch_has_acpi_pdc() == false)
return;
arch_acpi_processor_init_pdc(pr);
acpi_processor_eval_pdc(pr);
arch_acpi_processor_cleanup_pdc(pr);