diff --git a/[refs] b/[refs]
index 059e46632199..4116da2ef531 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: d42510a0f58c2583c37c8e9b7548e3a68545863a
+refs/heads/master: 785fcccd68bd4dc436f75fd4cd40e8557966c86d
diff --git a/trunk/drivers/acpi/processor_perflib.c b/trunk/drivers/acpi/processor_perflib.c
index f02c5ea9084f..41aaaba74b19 100644
--- a/trunk/drivers/acpi/processor_perflib.c
+++ b/trunk/drivers/acpi/processor_perflib.c
@@ -624,7 +624,7 @@ int acpi_processor_preregister_performance(
 	struct acpi_processor *match_pr;
 	struct acpi_psd_package *match_pdomain;
 
-	down(&performance_sem);
+	mutex_lock(&performance_mutex);
 
 	retval = 0;
 
@@ -772,7 +772,7 @@ int acpi_processor_preregister_performance(
 		pr->performance = NULL; /* Will be set for real in register */
 	}
 
-	up(&performance_sem);
+	mutex_unlock(&performance_mutex);
 	return retval;
 }
 EXPORT_SYMBOL(acpi_processor_preregister_performance);