diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index f52a6fb..cfcfbef 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -818,6 +818,7 @@
 		get_smp_config();
 #endif
 
+	prefill_possible_map();
 #ifdef CONFIG_X86_64
 	init_cpu_to_node();
 #endif
diff --git a/arch/x86/kernel/setup_percpu.c b/arch/x86/kernel/setup_percpu.c
index 43aca2d..5fc310f 100644
--- a/arch/x86/kernel/setup_percpu.c
+++ b/arch/x86/kernel/setup_percpu.c
@@ -162,16 +162,6 @@
 	char *ptr;
 	int cpu;
 
-	/* no processor from mptable or madt */
-	if (!num_processors)
-		num_processors = 1;
-
-#ifdef CONFIG_HOTPLUG_CPU
-	prefill_possible_map();
-#else
-	nr_cpu_ids = num_processors;
-#endif
-
 	/* Setup cpu_pda map */
 	setup_cpu_pda_map();
 
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index 3b19441..e1200b2 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -1278,12 +1278,20 @@
 	int i;
 	int possible;
 
+	/* no processor from mptable or madt */
+	if (!num_processors)
+		num_processors = 1;
+
+#ifdef CONFIG_HOTPLUG_CPU
 	if (additional_cpus == -1) {
 		if (disabled_cpus > 0)
 			additional_cpus = disabled_cpus;
 		else
 			additional_cpus = 0;
 	}
+#else
+	additional_cpus = 0;
+#endif
 	possible = num_processors + additional_cpus;
 	if (possible > NR_CPUS)
 		possible = NR_CPUS;
diff --git a/include/asm-x86/smp.h b/include/asm-x86/smp.h
index fad45f6..b324a06 100644
--- a/include/asm-x86/smp.h
+++ b/include/asm-x86/smp.h
@@ -119,6 +119,10 @@
 {
 	return cpus_weight(cpu_callout_map);
 }
+#else
+static inline void prefill_possible_map(void)
+{
+}
 #endif /* CONFIG_SMP */
 
 extern unsigned disabled_cpus __cpuinitdata;