diff --git a/arch/s390/include/asm/smp.h b/arch/s390/include/asm/smp.h
index c13c79025348..cd835f4fb11a 100644
--- a/arch/s390/include/asm/smp.h
+++ b/arch/s390/include/asm/smp.h
@@ -24,7 +24,6 @@ extern int __cpu_up(unsigned int cpu, struct task_struct *tidle);
 extern void arch_send_call_function_single_ipi(int cpu);
 extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
 
-extern void smp_call_online_cpu(void (*func)(void *), void *);
 extern void smp_call_ipl_cpu(void (*func)(void *), void *);
 extern void smp_emergency_stop(void);
 
diff --git a/arch/s390/kernel/ipl.c b/arch/s390/kernel/ipl.c
index 3a7d6e172211..f17bb7bf9392 100644
--- a/arch/s390/kernel/ipl.c
+++ b/arch/s390/kernel/ipl.c
@@ -2112,7 +2112,7 @@ void do_restart(void *arg)
 	tracing_off();
 	debug_locks_off();
 	lgr_info_log();
-	smp_call_online_cpu(__do_restart, arg);
+	smp_call_ipl_cpu(__do_restart, arg);
 }
 
 /* on halt */
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index c3c54adf67bc..1e1290525423 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -382,21 +382,6 @@ static int pcpu_set_smt(unsigned int mtid)
 	return cc;
 }
 
-/*
- * Call function on an online CPU.
- */
-void smp_call_online_cpu(void (*func)(void *), void *data)
-{
-	struct pcpu *pcpu;
-
-	/* Use the current cpu if it is online. */
-	pcpu = pcpu_find_address(cpu_online_mask, stap());
-	if (!pcpu)
-		/* Use the first online cpu. */
-		pcpu = pcpu_devices + cpumask_first(cpu_online_mask);
-	pcpu_delegate(pcpu, func, data, (unsigned long) restart_stack);
-}
-
 /*
  * Call function on the ipl CPU.
  */