diff --git a/arch/ia64/include/asm/acpi.h b/arch/ia64/include/asm/acpi.h
index 3b7888294648..7ae58892ba8d 100644
--- a/arch/ia64/include/asm/acpi.h
+++ b/arch/ia64/include/asm/acpi.h
@@ -133,6 +133,10 @@ extern int __initdata nid_to_pxm_map[MAX_NUMNODES];
 #endif
 
 static inline bool arch_has_acpi_pdc(void) { return true; }
+static inline void arch_acpi_set_pdc_bits(u32 *buf)
+{
+	buf[2] |= ACPI_PDC_EST_CAPABILITY_SMP;
+}
 
 #define acpi_unlazy_tlb(x)
 
diff --git a/arch/ia64/kernel/acpi-processor.c b/arch/ia64/kernel/acpi-processor.c
index ebe23f58bd6e..7ba5accebf66 100644
--- a/arch/ia64/kernel/acpi-processor.c
+++ b/arch/ia64/kernel/acpi-processor.c
@@ -14,24 +14,6 @@
 #include <acpi/processor.h>
 #include <asm/acpi.h>
 
-static void init_intel_pdc(struct acpi_processor *pr)
-{
-	u32 *buf = (u32 *)pr->pdc->pointer->buffer.pointer;
-
-	buf[2] |= ACPI_PDC_EST_CAPABILITY_SMP;
-
-	return;
-}
-
-/* Initialize _PDC data based on the CPU vendor */
-void arch_acpi_processor_init_pdc(struct acpi_processor *pr)
-{
-	init_intel_pdc(pr);
-	return;
-}
-
-EXPORT_SYMBOL(arch_acpi_processor_init_pdc);
-
 void arch_acpi_processor_cleanup_pdc(struct acpi_processor *pr)
 {
 	if (pr->pdc) {
diff --git a/arch/x86/include/asm/acpi.h b/arch/x86/include/asm/acpi.h
index d787e6e92bd1..56f462cf22d2 100644
--- a/arch/x86/include/asm/acpi.h
+++ b/arch/x86/include/asm/acpi.h
@@ -149,6 +149,25 @@ static inline bool arch_has_acpi_pdc(void)
 		c->x86_vendor == X86_VENDOR_CENTAUR);
 }
 
+static inline void arch_acpi_set_pdc_bits(u32 *buf)
+{
+	struct cpuinfo_x86 *c = &cpu_data(0);
+
+	buf[2] |= ACPI_PDC_C_CAPABILITY_SMP;
+
+	if (cpu_has(c, X86_FEATURE_EST))
+		buf[2] |= ACPI_PDC_EST_CAPABILITY_SWSMP;
+
+	if (cpu_has(c, X86_FEATURE_ACPI))
+		buf[2] |= ACPI_PDC_T_FFH;
+
+	/*
+	 * If mwait/monitor is unsupported, C2/C3_FFH will be disabled
+	 */
+	if (!cpu_has(c, X86_FEATURE_MWAIT))
+		buf[2] &= ~(ACPI_PDC_C_C2C3_FFH);
+}
+
 #else /* !CONFIG_ACPI */
 
 #define acpi_lapic 0
diff --git a/arch/x86/kernel/acpi/processor.c b/arch/x86/kernel/acpi/processor.c
index d722ca8cb4c7..0f57307f8224 100644
--- a/arch/x86/kernel/acpi/processor.c
+++ b/arch/x86/kernel/acpi/processor.c
@@ -12,40 +12,6 @@
 #include <acpi/processor.h>
 #include <asm/acpi.h>
 
-static void init_intel_pdc(struct acpi_processor *pr, struct cpuinfo_x86 *c)
-{
-	u32 *buf = (u32 *)pr->pdc->pointer->buffer.pointer;
-
-	buf[2] |= ACPI_PDC_C_CAPABILITY_SMP;
-
-	if (cpu_has(c, X86_FEATURE_EST))
-		buf[2] |= ACPI_PDC_EST_CAPABILITY_SWSMP;
-
-	if (cpu_has(c, X86_FEATURE_ACPI))
-		buf[2] |= ACPI_PDC_T_FFH;
-
-	/*
-	 * If mwait/monitor is unsupported, C2/C3_FFH will be disabled
-	 */
-	if (!cpu_has(c, X86_FEATURE_MWAIT))
-		buf[2] &= ~(ACPI_PDC_C_C2C3_FFH);
-
-	return;
-}
-
-
-/* Initialize _PDC data based on the CPU vendor */
-void arch_acpi_processor_init_pdc(struct acpi_processor *pr)
-{
-	struct cpuinfo_x86 *c = &cpu_data(pr->id);
-
-	init_intel_pdc(pr, c);
-
-	return;
-}
-
-EXPORT_SYMBOL(arch_acpi_processor_init_pdc);
-
 void arch_acpi_processor_cleanup_pdc(struct acpi_processor *pr)
 {
 	if (pr->pdc) {
diff --git a/drivers/acpi/processor_pdc.c b/drivers/acpi/processor_pdc.c
index ccda7c95d073..48df08ebcec4 100644
--- a/drivers/acpi/processor_pdc.c
+++ b/drivers/acpi/processor_pdc.c
@@ -40,6 +40,9 @@ static void acpi_set_pdc_bits(u32 *buf)
 
 	/* Enable coordination with firmware's _TSD info */
 	buf[2] = ACPI_PDC_SMP_T_SWCOORD;
+
+	/* Twiddle arch-specific bits needed for _PDC */
+	arch_acpi_set_pdc_bits(buf);
 }
 
 static void acpi_processor_init_pdc(struct acpi_processor *pr)
@@ -81,9 +84,6 @@ static void acpi_processor_init_pdc(struct acpi_processor *pr)
 	obj_list->pointer = obj;
 	pr->pdc = obj_list;
 
-	/* Now let the arch do the bit-twiddling to buf[] */
-	arch_acpi_processor_init_pdc(pr);
-
 	return;
 }
 
diff --git a/include/acpi/processor.h b/include/acpi/processor.h
index a1b748a7a766..50edd734aec6 100644
--- a/include/acpi/processor.h
+++ b/include/acpi/processor.h
@@ -257,7 +257,6 @@ int acpi_processor_notify_smm(struct module *calling_module);
 DECLARE_PER_CPU(struct acpi_processor *, processors);
 extern struct acpi_processor_errata errata;
 
-void arch_acpi_processor_init_pdc(struct acpi_processor *pr);
 void arch_acpi_processor_cleanup_pdc(struct acpi_processor *pr);
 
 #ifdef ARCH_HAS_POWER_INIT