2 files changed, 8 insertions, 5 deletions

diff --git a/drivers/acpi/acpica/hwsleep.c b/drivers/acpi/acpica/hwsleep.c
index 51868f48159c..26e249e69ead 100644
--- a/drivers/acpi/acpica/hwsleep.c
+++ b/drivers/acpi/acpica/hwsleep.c
@@ -90,6 +90,7 @@ acpi_set_firmware_waking_vector(u32 physical_address)
 
 ACPI_EXPORT_SYMBOL(acpi_set_firmware_waking_vector)
 
+#if ACPI_MACHINE_WIDTH == 64
 /*******************************************************************************
  *
  * FUNCTION:    acpi_set_firmware_waking_vector64
@@ -100,7 +101,8 @@ ACPI_EXPORT_SYMBOL(acpi_set_firmware_waking_vector)
  * RETURN:      Status
  *
  * DESCRIPTION: Sets the 64-bit X_firmware_waking_vector field of the FACS, if
- *              it exists in the table.
+ *              it exists in the table. This function is intended for use with
+ *              64-bit host operating systems.
  *
  ******************************************************************************/
 acpi_status
@@ -124,6 +126,7 @@ acpi_set_firmware_waking_vector64(u64 physical_address)
 }
 
 ACPI_EXPORT_SYMBOL(acpi_set_firmware_waking_vector64)
+#endif
 
 /*******************************************************************************
  *
diff --git a/include/acpi/acpixf.h b/include/acpi/acpixf.h
index 8f9df6235255..e10c89691043 100644
--- a/include/acpi/acpixf.h
+++ b/include/acpi/acpixf.h
@@ -351,11 +351,11 @@ acpi_status acpi_get_register_unlocked(u32 register_id, u32 *return_value);
 
 acpi_status acpi_set_register(u32 register_id, u32 value);
 
-acpi_status
-acpi_set_firmware_waking_vector(u32 physical_address);
+acpi_status acpi_set_firmware_waking_vector(u32 physical_address);
 
-acpi_status
-acpi_set_firmware_waking_vector64(u64 physical_address);
+#if ACPI_MACHINE_WIDTH == 64
+acpi_status acpi_set_firmware_waking_vector64(u64 physical_address);
+#endif
 
 acpi_status acpi_read(u32 *value, struct acpi_generic_address *reg);