1 files changed, 3 insertions, 0 deletions
diff --git a/kern/startup.c b/kern/startup.c
index 08743586..50f3eb26 100644
--- a/kern/startup.c
+++ b/kern/startup.c
@@ -126,11 +126,14 @@ void setup_main(void)
 	 */
 	PMAP_ACTIVATE_KERNEL(master_cpu);
 
+
+	#if NCPUS > 1
         /*
          * After virtual memory is up, do extra initializations:
          * currently it maps LAPIC (in acpi_rsdp.c)
          */
         extra_setup();
+	#endif
 
 	init_timers();
 	init_timeout();