diff --git a/arch/x86/kernel/mpparse_32.c b/arch/x86/kernel/mpparse_32.c
index 728aa9900934..f7eceabc7da9 100644
--- a/arch/x86/kernel/mpparse_32.c
+++ b/arch/x86/kernel/mpparse_32.c
@@ -70,8 +70,10 @@ unsigned int num_processors;
 
 unsigned disabled_cpus __cpuinitdata;
 
-/* Bitmask of physically existing CPUs */
+/* Make it easy to share the UP and SMP code: */
+#ifndef CONFIG_X86_SMP
 physid_mask_t phys_cpu_present_map;
+#endif
 
 #ifndef CONFIG_SMP
 DEFINE_PER_CPU(u16, x86_bios_cpu_apicid) = BAD_APICID;
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index 61b9a5b6fc07..8b6eefd9e906 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -85,6 +85,10 @@ u16 x86_bios_cpu_apicid_init[NR_CPUS] __initdata
 void *x86_bios_cpu_apicid_early_ptr;
 DEFINE_PER_CPU(u16, x86_bios_cpu_apicid) = BAD_APICID;
 EXPORT_PER_CPU_SYMBOL(x86_bios_cpu_apicid);
+
+/* Bitmask of physically existing CPUs */
+physid_mask_t phys_cpu_present_map;
+
 u8 apicid_2_node[MAX_APICID];
 #endif