--- zzzz-none-000/linux-2.6.39.4/drivers/acpi/acpica/utmutex.c	2011-08-03 19:43:28.000000000 +0000
+++ puma6-arm-6490-729/linux-2.6.39.4/drivers/acpi/acpica/utmutex.c	2021-11-10 13:23:10.000000000 +0000
@@ -287,7 +287,7 @@
 
 acpi_status acpi_ut_release_mutex(acpi_mutex_handle mutex_id)
 {
-	acpi_thread_id this_thread_id;
+	acpi_thread_id this_thread_id __maybe_unused;
 
 	ACPI_FUNCTION_NAME(ut_release_mutex);