v4.19.13 snapshot.
diff --git a/drivers/acpi/container.c b/drivers/acpi/container.c
new file mode 100644
index 0000000..12c2409
--- /dev/null
+++ b/drivers/acpi/container.c
@@ -0,0 +1,132 @@
+/*
+ * container.c - ACPI Generic Container Driver
+ *
+ * Copyright (C) 2004 Anil S Keshavamurthy (anil.s.keshavamurthy@intel.com)
+ * Copyright (C) 2004 Keiichiro Tokunaga (tokunaga.keiich@jp.fujitsu.com)
+ * Copyright (C) 2004 Motoyuki Ito (motoyuki@soft.fujitsu.com)
+ * Copyright (C) 2004 FUJITSU LIMITED
+ * Copyright (C) 2004, 2013 Intel Corp.
+ * Author: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ */
+#include <linux/acpi.h>
+#include <linux/container.h>
+
+#include "internal.h"
+
+#define _COMPONENT ACPI_CONTAINER_COMPONENT
+ACPI_MODULE_NAME("container");
+
+static const struct acpi_device_id container_device_ids[] = {
+ {"ACPI0004", 0},
+ {"PNP0A05", 0},
+ {"PNP0A06", 0},
+ {"", 0},
+};
+
+#ifdef CONFIG_ACPI_CONTAINER
+
+static int acpi_container_offline(struct container_dev *cdev)
+{
+ struct acpi_device *adev = ACPI_COMPANION(&cdev->dev);
+ struct acpi_device *child;
+
+ /* Check all of the dependent devices' physical companions. */
+ list_for_each_entry(child, &adev->children, node)
+ if (!acpi_scan_is_offline(child, false))
+ return -EBUSY;
+
+ return 0;
+}
+
+static void acpi_container_release(struct device *dev)
+{
+ kfree(to_container_dev(dev));
+}
+
+static int container_device_attach(struct acpi_device *adev,
+ const struct acpi_device_id *not_used)
+{
+ struct container_dev *cdev;
+ struct device *dev;
+ int ret;
+
+ if (adev->flags.is_dock_station)
+ return 0;
+
+ cdev = kzalloc(sizeof(*cdev), GFP_KERNEL);
+ if (!cdev)
+ return -ENOMEM;
+
+ cdev->offline = acpi_container_offline;
+ dev = &cdev->dev;
+ dev->bus = &container_subsys;
+ dev_set_name(dev, "%s", dev_name(&adev->dev));
+ ACPI_COMPANION_SET(dev, adev);
+ dev->release = acpi_container_release;
+ ret = device_register(dev);
+ if (ret) {
+ put_device(dev);
+ return ret;
+ }
+ adev->driver_data = dev;
+ return 1;
+}
+
+static void container_device_detach(struct acpi_device *adev)
+{
+ struct device *dev = acpi_driver_data(adev);
+
+ adev->driver_data = NULL;
+ if (dev)
+ device_unregister(dev);
+}
+
+static void container_device_online(struct acpi_device *adev)
+{
+ struct device *dev = acpi_driver_data(adev);
+
+ kobject_uevent(&dev->kobj, KOBJ_ONLINE);
+}
+
+static struct acpi_scan_handler container_handler = {
+ .ids = container_device_ids,
+ .attach = container_device_attach,
+ .detach = container_device_detach,
+ .hotplug = {
+ .enabled = true,
+ .demand_offline = true,
+ .notify_online = container_device_online,
+ },
+};
+
+void __init acpi_container_init(void)
+{
+ acpi_scan_add_handler(&container_handler);
+}
+
+#else
+
+static struct acpi_scan_handler container_handler = {
+ .ids = container_device_ids,
+};
+
+void __init acpi_container_init(void)
+{
+ acpi_scan_add_handler_with_hotplug(&container_handler, "container");
+}
+
+#endif /* CONFIG_ACPI_CONTAINER */