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authorAlex Chiang <achiang@hp.com>2009-12-20 12:19:14 -0700
committerLen Brown <len.brown@intel.com>2009-12-22 03:24:10 -0500
commit1d9cb470a755409ce97c3376174b1e234bd20371 (patch)
treecc0f35e02fed9b833be7bafda72b4980c4667ec9 /drivers/acpi
parent78f1699659963fff97975df44db6d5dbe7218e55 (diff)
ACPI: processor: introduce arch_has_acpi_pdc
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 <tony.luck@intel.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Alex Chiang <achiang@hp.com> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi')
-rw-r--r--drivers/acpi/processor_pdc.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/acpi/processor_pdc.c b/drivers/acpi/processor_pdc.c
index b416c32dda04..931e735e9e37 100644
--- a/drivers/acpi/processor_pdc.c
+++ b/drivers/acpi/processor_pdc.c
@@ -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);