x86: add hard_smp_prossor_id with MACRO in io_apic_xx.c

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

arch/x86/kernel/apic_32.c

@@ -1600,6 +1600,13 @@ void __cpuinit generic_processor_info(int apicid, int version)
 	cpu_set(cpu, cpu_present_map);
 }
 
+#ifdef CONFIG_X86_64
+int hard_smp_processor_id(void)
+{
+	return read_apic_id();
+}
+#endif
+
 /*
  * Power management
  */

arch/x86/kernel/apic_64.c

@@ -1612,10 +1612,12 @@ void __cpuinit generic_processor_info(int apicid, int version)
 	cpu_set(cpu, cpu_present_map);
 }
 
+#ifdef CONFIG_X86_64
 int hard_smp_processor_id(void)
 {
 	return read_apic_id();
 }
+#endif
 
 /*
  * Power management