diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index e61e7b8a2eaf129f6355b1d6f4cdbaf21329a5dc..4cefb98f274d9b69fef09ca8c3d88420d67619c3 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -311,9 +311,7 @@ static void acpi_bus_osc_support(void)
 	capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PPC_OST_SUPPORT;
 #endif
 
-#ifdef ACPI_HOTPLUG_OST
 	capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_HOTPLUG_OST_SUPPORT;
-#endif
 
 	if (!ghes_disable)
 		capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_APEI_SUPPORT;
@@ -410,7 +408,7 @@ static void acpi_bus_notify(acpi_handle handle, u32 type, void *data)
 	return;
 
  err:
-	acpi_evaluate_hotplug_ost(handle, type, ost_code, NULL);
+	acpi_evaluate_ost(handle, type, ost_code, NULL);
 }
 
 /* --------------------------------------------------------------------------
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 3fc530a8d362b15dff064584de7bd40417143933..f2d8d1c1c3918321a815bf059c6a66f4564789d1 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -463,8 +463,8 @@ static int acpi_generic_hotplug_event(struct acpi_device *adev, u32 type)
 			dev_info(&adev->dev, "Eject disabled\n");
 			return -EPERM;
 		}
-		acpi_evaluate_hotplug_ost(adev->handle, ACPI_NOTIFY_EJECT_REQUEST,
-					  ACPI_OST_SC_EJECT_IN_PROGRESS, NULL);
+		acpi_evaluate_ost(adev->handle, ACPI_NOTIFY_EJECT_REQUEST,
+				  ACPI_OST_SC_EJECT_IN_PROGRESS, NULL);
 		return acpi_scan_hot_remove(adev);
 	}
 	return -EINVAL;
@@ -512,7 +512,7 @@ void acpi_device_hotplug(void *data, u32 src)
 		ost_code = ACPI_OST_SC_SUCCESS;
 
  err_out:
-	acpi_evaluate_hotplug_ost(adev->handle, src, ost_code, NULL);
+	acpi_evaluate_ost(adev->handle, src, ost_code, NULL);
 
  out:
 	acpi_bus_put_acpi_device(adev);
@@ -572,8 +572,8 @@ acpi_eject_store(struct device *d, struct device_attribute *attr,
 		return count;
 
 	put_device(&acpi_device->dev);
-	acpi_evaluate_hotplug_ost(acpi_device->handle, ACPI_OST_EC_OSPM_EJECT,
-				  ACPI_OST_SC_NON_SPECIFIC_FAILURE, NULL);
+	acpi_evaluate_ost(acpi_device->handle, ACPI_OST_EC_OSPM_EJECT,
+			  ACPI_OST_SC_NON_SPECIFIC_FAILURE, NULL);
 	return status == AE_NO_MEMORY ? -ENOMEM : -EAGAIN;
 }
 
diff --git a/drivers/acpi/utils.c b/drivers/acpi/utils.c
index 19d0169740805fe3f1d331f3b646cd53a5d04aff..0f5f78fa6545cf4d30da8f56b426033ac7f7132e 100644
--- a/drivers/acpi/utils.c
+++ b/drivers/acpi/utils.c
@@ -422,7 +422,7 @@ acpi_get_physical_device_location(acpi_handle handle, struct acpi_pld_info **pld
 EXPORT_SYMBOL(acpi_get_physical_device_location);
 
 /**
- * acpi_evaluate_hotplug_ost: Evaluate _OST for hotplug operations
+ * acpi_evaluate_ost: Evaluate _OST for hotplug operations
  * @handle: ACPI device handle
  * @source_event: source event code
  * @status_code: status code
diff --git a/drivers/xen/xen-acpi-cpuhotplug.c b/drivers/xen/xen-acpi-cpuhotplug.c
index 80875fb770ed931681c75db5aa4209c15acfc7a7..3e62ee4b3b6641208e6833b639e25e5203f75ec9 100644
--- a/drivers/xen/xen-acpi-cpuhotplug.c
+++ b/drivers/xen/xen-acpi-cpuhotplug.c
@@ -313,7 +313,7 @@ static void acpi_processor_hotplug_notify(acpi_handle handle,
 		goto out;
 	}
 
-	(void) acpi_evaluate_hotplug_ost(handle, event, ost_code, NULL);
+	(void) acpi_evaluate_ost(handle, event, ost_code, NULL);
 
 out:
 	acpi_scan_lock_release();
diff --git a/drivers/xen/xen-acpi-memhotplug.c b/drivers/xen/xen-acpi-memhotplug.c
index f8d18626969a48819ae5810f1d424dc4eacf3f31..34e40b733f9a8f27cdfb142f8ce67f081188d63b 100644
--- a/drivers/xen/xen-acpi-memhotplug.c
+++ b/drivers/xen/xen-acpi-memhotplug.c
@@ -285,7 +285,7 @@ static void acpi_memory_device_notify(acpi_handle handle, u32 event, void *data)
 		return;
 	}
 
-	(void) acpi_evaluate_hotplug_ost(handle, event, ost_code, NULL);
+	(void) acpi_evaluate_ost(handle, event, ost_code, NULL);
 	return;
 }
 
diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
index 5225fe06e4fff7695e9da1610ca02d6d17b65cb0..4308a9aacc9a1276c241090324b499701fdbd145 100644
--- a/include/acpi/acpi_bus.h
+++ b/include/acpi/acpi_bus.h
@@ -51,14 +51,6 @@ acpi_evaluate_reference(acpi_handle handle,
 acpi_status
 acpi_evaluate_ost(acpi_handle handle, u32 source_event, u32 status_code,
 		  struct acpi_buffer *status_buf);
-#ifdef ACPI_HOTPLUG_OST
-#define	acpi_evaluate_hotplug_ost	acpi_evaluate_ost
-#else
-static inline acpi_status
-acpi_evaluate_hotplug_ost(acpi_handle handle, u32 source_event,
-			u32 status_code, struct acpi_buffer *status_buf)
-{ return AE_OK; }
-#endif
 
 acpi_status
 acpi_get_physical_device_location(acpi_handle handle, struct acpi_pld_info **pld);