x86: call nmi_watchdog_default in i386

this does not exist, so it will be an empty macro
Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

arch/x86/kernel/smpboot_32.c

@@ -876,6 +876,7 @@ static void __init smp_boot_cpus(unsigned int max_cpus)
    who understands all this stuff should rewrite it properly. --RR 15/Jul/02 */
 void __init native_smp_prepare_cpus(unsigned int max_cpus)
 {
+	nmi_watchdog_default();
 	smp_commenced_mask = cpumask_of_cpu(0);
 	cpu_callin_map = cpumask_of_cpu(0);
 	mb();

include/asm-x86/nmi.h

@@ -39,6 +39,9 @@ static inline void unset_nmi_pm_callback(struct pm_dev *dev)
 #ifdef CONFIG_X86_64
 extern void default_do_nmi(struct pt_regs *);
 extern void die_nmi(char *str, struct pt_regs *regs, int do_panic);
+extern void nmi_watchdog_default(void);
+#else
+#define nmi_watchdog_default() do {} while (0)
 #endif
 
 extern int check_nmi_watchdog(void);
@@ -50,7 +53,6 @@ extern int reserve_perfctr_nmi(unsigned int);
 extern void release_perfctr_nmi(unsigned int);
 extern int reserve_evntsel_nmi(unsigned int);
 extern void release_evntsel_nmi(unsigned int);
-extern void nmi_watchdog_default(void);
 
 extern void setup_apic_nmi_watchdog(void *);
 extern void stop_apic_nmi_watchdog(void *);