Index: sys/x86/x86/mp_x86.c
===================================================================
--- sys/x86/x86/mp_x86.c
+++ sys/x86/x86/mp_x86.c
@@ -1007,10 +1007,10 @@
 	KASSERT(PCPU_GET(idlethread) != NULL, ("no idle thread"));
 	PCPU_SET(curthread, PCPU_GET(idlethread));
 
-	mca_init();
-
 	mtx_lock_spin(&ap_boot_mtx);
 
+	mca_init();
+
 	/* Init local apic for irq's */
 	lapic_setup(1);