diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 3671506fb8df34ed859e132846459f7df6be82d9..f4dd851384dbddb36f945634fc15b2e5793ae6c7 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -238,10 +238,6 @@ config SMP
 
 	  If you don't know what to do here, say N.
 
-config X86_HAS_BOOT_CPU_ID
-	def_bool y
-	depends on X86_VOYAGER
-
 config SPARSE_IRQ
 	bool "Support sparse irq numbering"
 	depends on PCI_MSI || HT_IRQ
diff --git a/arch/x86/include/asm/cpu.h b/arch/x86/include/asm/cpu.h
index f03b23e328645e319118d5ed06729b2a7e34887c..b185091bf19ce39f67a325ecd6aafb7c13f8cd23 100644
--- a/arch/x86/include/asm/cpu.h
+++ b/arch/x86/include/asm/cpu.h
@@ -32,10 +32,6 @@ extern void arch_unregister_cpu(int);
 
 DECLARE_PER_CPU(int, cpu_state);
 
-#ifdef CONFIG_X86_HAS_BOOT_CPU_ID
-extern unsigned char boot_cpu_id;
-#else
-#define boot_cpu_id				0
-#endif
+extern unsigned int boot_cpu_id;
 
 #endif /* _ASM_X86_CPU_H */
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index eeb180b1d7aaae0da5af6b448896312bb8f0431f..609e5af60282c3dc14327e89f8c8ac8744d385a1 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -112,6 +112,20 @@
 #define ARCH_SETUP
 #endif
 
+unsigned int boot_cpu_id __read_mostly;
+
+#ifdef CONFIG_X86_64
+int default_cpu_present_to_apicid(int mps_cpu)
+{
+	return __default_cpu_present_to_apicid(mps_cpu);
+}
+
+int default_check_phys_apicid_present(int boot_cpu_physical_apicid)
+{
+	return __default_check_phys_apicid_present(boot_cpu_physical_apicid);
+}
+#endif
+
 #ifndef CONFIG_DEBUG_BOOT_PARAMS
 struct boot_params __initdata boot_params;
 #else
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index e90b3e50b54fc9e7447b94448957708d2c93ecb1..bc7e220ba0b4990aa70fdeabbdeef0dff4360ffd 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -905,18 +905,6 @@ static int __cpuinit do_boot_cpu(int apicid, int cpu)
 	return boot_error;
 }
 
-#ifdef CONFIG_X86_64
-int default_cpu_present_to_apicid(int mps_cpu)
-{
-	return __default_cpu_present_to_apicid(mps_cpu);
-}
-
-int default_check_phys_apicid_present(int boot_cpu_physical_apicid)
-{
-	return __default_check_phys_apicid_present(boot_cpu_physical_apicid);
-}
-#endif
-
 int __cpuinit native_cpu_up(unsigned int cpu)
 {
 	int apicid = apic->cpu_present_to_apicid(cpu);