diff --git a/drivers/acpi/processor_core.c b/drivers/acpi/processor_core.c
index 9dd0fa93b9e1c1e2a9bd459638918ba47c25125e..1c0008edccdaba616da88da593d1b1ce06d4eaa0 100644
--- a/drivers/acpi/processor_core.c
+++ b/drivers/acpi/processor_core.c
@@ -1014,9 +1014,9 @@ static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu)
 
 static int acpi_processor_handle_eject(struct acpi_processor *pr)
 {
-	if (cpu_online(pr->id)) {
-		return (-EINVAL);
-	}
+	if (cpu_online(pr->id))
+		cpu_down(pr->id);
+
 	arch_unregister_cpu(pr->id);
 	acpi_unmap_lsapic(pr->id);
 	return (0);
diff --git a/kernel/cpu.c b/kernel/cpu.c
index b11f06dc149add3a29c072e2ec9356499dd9dbc1..cfb1d43ab801b69f24c47c0cdb17332c25f6f99e 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -299,6 +299,7 @@ int __ref cpu_down(unsigned int cpu)
 	cpu_maps_update_done();
 	return err;
 }
+EXPORT_SYMBOL(cpu_down);
 #endif /*CONFIG_HOTPLUG_CPU*/
 
 /* Requires cpu_add_remove_lock to be held */