diff --git a/include/acpi/acinterp.h b/include/acpi/acinterp.h
index 4409830..73967c8 100644
--- a/include/acpi/acinterp.h
+++ b/include/acpi/acinterp.h
@@ -446,10 +446,14 @@
 /*
  * exutils - interpreter/scanner utilities
  */
-acpi_status acpi_ex_enter_interpreter(void);
+void acpi_ex_enter_interpreter(void);
 
 void acpi_ex_exit_interpreter(void);
 
+void acpi_ex_reacquire_interpreter(void);
+
+void acpi_ex_relinquish_interpreter(void);
+
 void acpi_ex_truncate_for32bit_table(union acpi_operand_object *obj_desc);
 
 u8 acpi_ex_acquire_global_lock(u32 rule);