diff --git a/arch/parisc/kernel/smp.c b/arch/parisc/kernel/smp.c
index 0bb1d63907f8..4dc7b7942b4c 100644
--- a/arch/parisc/kernel/smp.c
+++ b/arch/parisc/kernel/smp.c
@@ -31,6 +31,7 @@
 #include <linux/delay.h>
 #include <linux/bitops.h>
 #include <linux/ftrace.h>
+#include <linux/cpu.h>
 
 #include <linux/atomic.h>
 #include <asm/current.h>
@@ -295,8 +296,13 @@ smp_cpu_init(int cpunum)
 
 		printk(KERN_CRIT "CPU#%d already initialized!\n", cpunum);
 		machine_halt();
-	}  
+	}
+
+	notify_cpu_starting(cpunum);
+
+	ipi_call_lock();
 	set_cpu_online(cpunum, true);
+	ipi_call_unlock();
 
 	/* Initialise the idle task for this CPU */
 	atomic_inc(&init_mm.mm_count);