1 files changed, 0 insertions, 1039 deletions

diff --git a/libdde_linux26/contrib/drivers/base/bus.c b/libdde_linux26/contrib/drivers/base/bus.c
deleted file mode 100644
index 83f32b89..00000000
--- a/libdde_linux26/contrib/drivers/base/bus.c
+++ /dev/null
@@ -1,1039 +0,0 @@
-/*
- * bus.c - bus driver management
- *
- * Copyright (c) 2002-3 Patrick Mochel
- * Copyright (c) 2002-3 Open Source Development Labs
- * Copyright (c) 2007 Greg Kroah-Hartman <gregkh@suse.de>
- * Copyright (c) 2007 Novell Inc.
- *
- * This file is released under the GPLv2
- *
- */
-
-#include <linux/device.h>
-#include <linux/module.h>
-#include <linux/errno.h>
-#include <linux/init.h>
-#include <linux/string.h>
-#include "base.h"
-#include "power/power.h"
-
-#define to_bus_attr(_attr) container_of(_attr, struct bus_attribute, attr)
-#define to_bus(obj) container_of(obj, struct bus_type_private, subsys.kobj)
-
-/*
- * sysfs bindings for drivers
- */
-
-#define to_drv_attr(_attr) container_of(_attr, struct driver_attribute, attr)
-
-
-static int __must_check bus_rescan_devices_helper(struct device *dev,
-						void *data);
-
-static struct bus_type *bus_get(struct bus_type *bus)
-{
-	if (bus) {
-		kset_get(&bus->p->subsys);
-		return bus;
-	}
-	return NULL;
-}
-
-static void bus_put(struct bus_type *bus)
-{
-	if (bus)
-		kset_put(&bus->p->subsys);
-}
-
-static ssize_t drv_attr_show(struct kobject *kobj, struct attribute *attr,
-			     char *buf)
-{
-	struct driver_attribute *drv_attr = to_drv_attr(attr);
-	struct driver_private *drv_priv = to_driver(kobj);
-	ssize_t ret = -EIO;
-
-	if (drv_attr->show)
-		ret = drv_attr->show(drv_priv->driver, buf);
-	return ret;
-}
-
-static ssize_t drv_attr_store(struct kobject *kobj, struct attribute *attr,
-			      const char *buf, size_t count)
-{
-	struct driver_attribute *drv_attr = to_drv_attr(attr);
-	struct driver_private *drv_priv = to_driver(kobj);
-	ssize_t ret = -EIO;
-
-	if (drv_attr->store)
-		ret = drv_attr->store(drv_priv->driver, buf, count);
-	return ret;
-}
-
-static struct sysfs_ops driver_sysfs_ops = {
-	.show	= drv_attr_show,
-	.store	= drv_attr_store,
-};
-
-static void driver_release(struct kobject *kobj)
-{
-	struct driver_private *drv_priv = to_driver(kobj);
-
-	pr_debug("driver: '%s': %s\n", kobject_name(kobj), __func__);
-	kfree(drv_priv);
-}
-
-static struct kobj_type driver_ktype = {
-	.sysfs_ops	= &driver_sysfs_ops,
-	.release	= driver_release,
-};
-
-/*
- * sysfs bindings for buses
- */
-static ssize_t bus_attr_show(struct kobject *kobj, struct attribute *attr,
-			     char *buf)
-{
-	struct bus_attribute *bus_attr = to_bus_attr(attr);
-	struct bus_type_private *bus_priv = to_bus(kobj);
-	ssize_t ret = 0;
-
-	if (bus_attr->show)
-		ret = bus_attr->show(bus_priv->bus, buf);
-	return ret;
-}
-
-static ssize_t bus_attr_store(struct kobject *kobj, struct attribute *attr,
-			      const char *buf, size_t count)
-{
-	struct bus_attribute *bus_attr = to_bus_attr(attr);
-	struct bus_type_private *bus_priv = to_bus(kobj);
-	ssize_t ret = 0;
-
-	if (bus_attr->store)
-		ret = bus_attr->store(bus_priv->bus, buf, count);
-	return ret;
-}
-
-static struct sysfs_ops bus_sysfs_ops = {
-	.show	= bus_attr_show,
-	.store	= bus_attr_store,
-};
-
-int bus_create_file(struct bus_type *bus, struct bus_attribute *attr)
-{
-	int error;
-	if (bus_get(bus)) {
-		error = sysfs_create_file(&bus->p->subsys.kobj, &attr->attr);
-		bus_put(bus);
-	} else
-		error = -EINVAL;
-	return error;
-}
-EXPORT_SYMBOL_GPL(bus_create_file);
-
-void bus_remove_file(struct bus_type *bus, struct bus_attribute *attr)
-{
-	if (bus_get(bus)) {
-		sysfs_remove_file(&bus->p->subsys.kobj, &attr->attr);
-		bus_put(bus);
-	}
-}
-EXPORT_SYMBOL_GPL(bus_remove_file);
-
-static struct kobj_type bus_ktype = {
-	.sysfs_ops	= &bus_sysfs_ops,
-};
-
-static int bus_uevent_filter(struct kset *kset, struct kobject *kobj)
-{
-	struct kobj_type *ktype = get_ktype(kobj);
-
-	if (ktype == &bus_ktype)
-		return 1;
-	return 0;
-}
-
-static struct kset_uevent_ops bus_uevent_ops = {
-	.filter = bus_uevent_filter,
-};
-
-static struct kset *bus_kset;
-
-
-#ifdef CONFIG_HOTPLUG
-/* Manually detach a device from its associated driver. */
-static ssize_t driver_unbind(struct device_driver *drv,
-			     const char *buf, size_t count)
-{
-	struct bus_type *bus = bus_get(drv->bus);
-	struct device *dev;
-	int err = -ENODEV;
-
-	dev = bus_find_device_by_name(bus, NULL, buf);
-	if (dev && dev->driver == drv) {
-		if (dev->parent)	/* Needed for USB */
-			down(&dev->parent->sem);
-		device_release_driver(dev);
-		if (dev->parent)
-			up(&dev->parent->sem);
-		err = count;
-	}
-	put_device(dev);
-	bus_put(bus);
-	return err;
-}
-static DRIVER_ATTR(unbind, S_IWUSR, NULL, driver_unbind);
-
-/*
- * Manually attach a device to a driver.
- * Note: the driver must want to bind to the device,
- * it is not possible to override the driver's id table.
- */
-static ssize_t driver_bind(struct device_driver *drv,
-			   const char *buf, size_t count)
-{
-	struct bus_type *bus = bus_get(drv->bus);
-	struct device *dev;
-	int err = -ENODEV;
-
-	dev = bus_find_device_by_name(bus, NULL, buf);
-	if (dev && dev->driver == NULL) {
-		if (dev->parent)	/* Needed for USB */
-			down(&dev->parent->sem);
-		down(&dev->sem);
-		err = driver_probe_device(drv, dev);
-		up(&dev->sem);
-		if (dev->parent)
-			up(&dev->parent->sem);
-
-		if (err > 0) {
-			/* success */
-			err = count;
-		} else if (err == 0) {
-			/* driver didn't accept device */
-			err = -ENODEV;
-		}
-	}
-	put_device(dev);
-	bus_put(bus);
-	return err;
-}
-static DRIVER_ATTR(bind, S_IWUSR, NULL, driver_bind);
-
-static ssize_t show_drivers_autoprobe(struct bus_type *bus, char *buf)
-{
-	return sprintf(buf, "%d\n", bus->p->drivers_autoprobe);
-}
-
-static ssize_t store_drivers_autoprobe(struct bus_type *bus,
-				       const char *buf, size_t count)
-{
-	if (buf[0] == '0')
-		bus->p->drivers_autoprobe = 0;
-	else
-		bus->p->drivers_autoprobe = 1;
-	return count;
-}
-
-static ssize_t store_drivers_probe(struct bus_type *bus,
-				   const char *buf, size_t count)
-{
-	struct device *dev;
-
-	dev = bus_find_device_by_name(bus, NULL, buf);
-	if (!dev)
-		return -ENODEV;
-	if (bus_rescan_devices_helper(dev, NULL) != 0)
-		return -EINVAL;
-	return count;
-}
-#endif
-
-static struct device *next_device(struct klist_iter *i)
-{
-	struct klist_node *n = klist_next(i);
-	return n ? container_of(n, struct device, knode_bus) : NULL;
-}
-
-/**
- * bus_for_each_dev - device iterator.
- * @bus: bus type.
- * @start: device to start iterating from.
- * @data: data for the callback.
- * @fn: function to be called for each device.
- *
- * Iterate over @bus's list of devices, and call @fn for each,
- * passing it @data. If @start is not NULL, we use that device to
- * begin iterating from.
- *
- * We check the return of @fn each time. If it returns anything
- * other than 0, we break out and return that value.
- *
- * NOTE: The device that returns a non-zero value is not retained
- * in any way, nor is its refcount incremented. If the caller needs
- * to retain this data, it should do, and increment the reference
- * count in the supplied callback.
- */
-int bus_for_each_dev(struct bus_type *bus, struct device *start,
-		     void *data, int (*fn)(struct device *, void *))
-{
-	struct klist_iter i;
-	struct device *dev;
-	int error = 0;
-
-	if (!bus)
-		return -EINVAL;
-
-	klist_iter_init_node(&bus->p->klist_devices, &i,
-			     (start ? &start->knode_bus : NULL));
-	while ((dev = next_device(&i)) && !error)
-		error = fn(dev, data);
-	klist_iter_exit(&i);
-	return error;
-}
-EXPORT_SYMBOL_GPL(bus_for_each_dev);
-
-/**
- * bus_find_device - device iterator for locating a particular device.
- * @bus: bus type
- * @start: Device to begin with
- * @data: Data to pass to match function
- * @match: Callback function to check device
- *
- * This is similar to the bus_for_each_dev() function above, but it
- * returns a reference to a device that is 'found' for later use, as
- * determined by the @match callback.
- *
- * The callback should return 0 if the device doesn't match and non-zero
- * if it does.  If the callback returns non-zero, this function will
- * return to the caller and not iterate over any more devices.
- */
-struct device *bus_find_device(struct bus_type *bus,
-			       struct device *start, void *data,
-			       int (*match)(struct device *dev, void *data))
-{
-	struct klist_iter i;
-	struct device *dev;
-
-	if (!bus)
-		return NULL;
-
-	klist_iter_init_node(&bus->p->klist_devices, &i,
-			     (start ? &start->knode_bus : NULL));
-	while ((dev = next_device(&i)))
-		if (match(dev, data) && get_device(dev))
-			break;
-	klist_iter_exit(&i);
-	return dev;
-}
-EXPORT_SYMBOL_GPL(bus_find_device);
-
-static int match_name(struct device *dev, void *data)
-{
-	const char *name = data;
-
-	return sysfs_streq(name, dev_name(dev));
-}
-
-/**
- * bus_find_device_by_name - device iterator for locating a particular device of a specific name
- * @bus: bus type
- * @start: Device to begin with
- * @name: name of the device to match
- *
- * This is similar to the bus_find_device() function above, but it handles
- * searching by a name automatically, no need to write another strcmp matching
- * function.
- */
-struct device *bus_find_device_by_name(struct bus_type *bus,
-				       struct device *start, const char *name)
-{
-	return bus_find_device(bus, start, (void *)name, match_name);
-}
-EXPORT_SYMBOL_GPL(bus_find_device_by_name);
-
-static struct device_driver *next_driver(struct klist_iter *i)
-{
-	struct klist_node *n = klist_next(i);
-	struct driver_private *drv_priv;
-
-	if (n) {
-		drv_priv = container_of(n, struct driver_private, knode_bus);
-		return drv_priv->driver;
-	}
-	return NULL;
-}
-
-/**
- * bus_for_each_drv - driver iterator
- * @bus: bus we're dealing with.
- * @start: driver to start iterating on.
- * @data: data to pass to the callback.
- * @fn: function to call for each driver.
- *
- * This is nearly identical to the device iterator above.
- * We iterate over each driver that belongs to @bus, and call
- * @fn for each. If @fn returns anything but 0, we break out
- * and return it. If @start is not NULL, we use it as the head
- * of the list.
- *
- * NOTE: we don't return the driver that returns a non-zero
- * value, nor do we leave the reference count incremented for that
- * driver. If the caller needs to know that info, it must set it
- * in the callback. It must also be sure to increment the refcount
- * so it doesn't disappear before returning to the caller.
- */
-int bus_for_each_drv(struct bus_type *bus, struct device_driver *start,
-		     void *data, int (*fn)(struct device_driver *, void *))
-{
-	struct klist_iter i;
-	struct device_driver *drv;
-	int error = 0;
-
-	if (!bus)
-		return -EINVAL;
-
-	klist_iter_init_node(&bus->p->klist_drivers, &i,
-			     start ? &start->p->knode_bus : NULL);
-	while ((drv = next_driver(&i)) && !error)
-		error = fn(drv, data);
-	klist_iter_exit(&i);
-	return error;
-}
-EXPORT_SYMBOL_GPL(bus_for_each_drv);
-
-static int device_add_attrs(struct bus_type *bus, struct device *dev)
-{
-	int error = 0;
-	int i;
-
-	if (!bus->dev_attrs)
-		return 0;
-
-	for (i = 0; attr_name(bus->dev_attrs[i]); i++) {
-		error = device_create_file(dev, &bus->dev_attrs[i]);
-		if (error) {
-			while (--i >= 0)
-				device_remove_file(dev, &bus->dev_attrs[i]);
-			break;
-		}
-	}
-	return error;
-}
-
-static void device_remove_attrs(struct bus_type *bus, struct device *dev)
-{
-	int i;
-
-	if (bus->dev_attrs) {
-		for (i = 0; attr_name(bus->dev_attrs[i]); i++)
-			device_remove_file(dev, &bus->dev_attrs[i]);
-	}
-}
-
-#ifdef CONFIG_SYSFS_DEPRECATED
-static int make_deprecated_bus_links(struct device *dev)
-{
-	return sysfs_create_link(&dev->kobj,
-				 &dev->bus->p->subsys.kobj, "bus");
-}
-
-static void remove_deprecated_bus_links(struct device *dev)
-{
-	sysfs_remove_link(&dev->kobj, "bus");
-}
-#else
-static inline int make_deprecated_bus_links(struct device *dev) { return 0; }
-static inline void remove_deprecated_bus_links(struct device *dev) { }
-#endif
-
-/**
- * bus_add_device - add device to bus
- * @dev: device being added
- *
- * - Add the device to its bus's list of devices.
- * - Create link to device's bus.
- */
-int bus_add_device(struct device *dev)
-{
-	struct bus_type *bus = bus_get(dev->bus);
-	int error = 0;
-
-	if (bus) {
-		pr_debug("bus: '%s': add device %s\n", bus->name, dev_name(dev));
-		error = device_add_attrs(bus, dev);
-		if (error)
-			goto out_put;
-		error = sysfs_create_link(&bus->p->devices_kset->kobj,
-						&dev->kobj, dev_name(dev));
-		if (error)
-			goto out_id;
-		error = sysfs_create_link(&dev->kobj,
-				&dev->bus->p->subsys.kobj, "subsystem");
-		if (error)
-			goto out_subsys;
-		error = make_deprecated_bus_links(dev);
-		if (error)
-			goto out_deprecated;
-	}
-	return 0;
-
-out_deprecated:
-	sysfs_remove_link(&dev->kobj, "subsystem");
-out_subsys:
-	sysfs_remove_link(&bus->p->devices_kset->kobj, dev_name(dev));
-out_id:
-	device_remove_attrs(bus, dev);
-out_put:
-	bus_put(dev->bus);
-	return error;
-}
-
-/**
- * bus_attach_device - add device to bus
- * @dev: device tried to attach to a driver
- *
- * - Add device to bus's list of devices.
- * - Try to attach to driver.
- */
-void bus_attach_device(struct device *dev)
-{
-	struct bus_type *bus = dev->bus;
-	int ret = 0;
-
-	if (bus) {
-		if (bus->p->drivers_autoprobe)
-			ret = device_attach(dev);
-		WARN_ON(ret < 0);
-		if (ret >= 0)
-			klist_add_tail(&dev->knode_bus, &bus->p->klist_devices);
-	}
-}
-
-/**
- * bus_remove_device - remove device from bus
- * @dev: device to be removed
- *
- * - Remove symlink from bus's directory.
- * - Delete device from bus's list.
- * - Detach from its driver.
- * - Drop reference taken in bus_add_device().
- */
-void bus_remove_device(struct device *dev)
-{
-	if (dev->bus) {
-		sysfs_remove_link(&dev->kobj, "subsystem");
-		remove_deprecated_bus_links(dev);
-		sysfs_remove_link(&dev->bus->p->devices_kset->kobj,
-				  dev_name(dev));
-		device_remove_attrs(dev->bus, dev);
-		if (klist_node_attached(&dev->knode_bus))
-			klist_del(&dev->knode_bus);
-
-		pr_debug("bus: '%s': remove device %s\n",
-			 dev->bus->name, dev_name(dev));
-		device_release_driver(dev);
-		bus_put(dev->bus);
-	}
-}
-
-static int driver_add_attrs(struct bus_type *bus, struct device_driver *drv)
-{
-	int error = 0;
-	int i;
-
-	if (bus->drv_attrs) {
-		for (i = 0; attr_name(bus->drv_attrs[i]); i++) {
-			error = driver_create_file(drv, &bus->drv_attrs[i]);
-			if (error)
-				goto err;
-		}
-	}
-done:
-	return error;
-err:
-	while (--i >= 0)
-		driver_remove_file(drv, &bus->drv_attrs[i]);
-	goto done;
-}
-
-static void driver_remove_attrs(struct bus_type *bus,
-				struct device_driver *drv)
-{
-	int i;
-
-	if (bus->drv_attrs) {
-		for (i = 0; attr_name(bus->drv_attrs[i]); i++)
-			driver_remove_file(drv, &bus->drv_attrs[i]);
-	}
-}
-
-#ifdef CONFIG_HOTPLUG
-/*
- * Thanks to drivers making their tables __devinit, we can't allow manual
- * bind and unbind from userspace unless CONFIG_HOTPLUG is enabled.
- */
-static int __must_check add_bind_files(struct device_driver *drv)
-{
-	int ret;
-
-	ret = driver_create_file(drv, &driver_attr_unbind);
-	if (ret == 0) {
-		ret = driver_create_file(drv, &driver_attr_bind);
-		if (ret)
-			driver_remove_file(drv, &driver_attr_unbind);
-	}
-	return ret;
-}
-
-static void remove_bind_files(struct device_driver *drv)
-{
-	driver_remove_file(drv, &driver_attr_bind);
-	driver_remove_file(drv, &driver_attr_unbind);
-}
-
-static BUS_ATTR(drivers_probe, S_IWUSR, NULL, store_drivers_probe);
-static BUS_ATTR(drivers_autoprobe, S_IWUSR | S_IRUGO,
-		show_drivers_autoprobe, store_drivers_autoprobe);
-
-static int add_probe_files(struct bus_type *bus)
-{
-	int retval;
-
-	retval = bus_create_file(bus, &bus_attr_drivers_probe);
-	if (retval)
-		goto out;
-
-	retval = bus_create_file(bus, &bus_attr_drivers_autoprobe);
-	if (retval)
-		bus_remove_file(bus, &bus_attr_drivers_probe);
-out:
-	return retval;
-}
-
-static void remove_probe_files(struct bus_type *bus)
-{
-	bus_remove_file(bus, &bus_attr_drivers_autoprobe);
-	bus_remove_file(bus, &bus_attr_drivers_probe);
-}
-#else
-static inline int add_bind_files(struct device_driver *drv) { return 0; }
-static inline void remove_bind_files(struct device_driver *drv) {}
-static inline int add_probe_files(struct bus_type *bus) { return 0; }
-static inline void remove_probe_files(struct bus_type *bus) {}
-#endif
-
-static ssize_t driver_uevent_store(struct device_driver *drv,
-				   const char *buf, size_t count)
-{
-	enum kobject_action action;
-
-	if (kobject_action_type(buf, count, &action) == 0)
-		kobject_uevent(&drv->p->kobj, action);
-	return count;
-}
-static DRIVER_ATTR(uevent, S_IWUSR, NULL, driver_uevent_store);
-
-/**
- * bus_add_driver - Add a driver to the bus.
- * @drv: driver.
- */
-int bus_add_driver(struct device_driver *drv)
-{
-	struct bus_type *bus;
-	struct driver_private *priv;
-	int error = 0;
-
-	bus = bus_get(drv->bus);
-	if (!bus)
-		return -EINVAL;
-
-	pr_debug("bus: '%s': add driver %s\n", bus->name, drv->name);
-
-	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
-	if (!priv) {
-		error = -ENOMEM;
-		goto out_put_bus;
-	}
-	klist_init(&priv->klist_devices, NULL, NULL);
-	priv->driver = drv;
-	drv->p = priv;
-	priv->kobj.kset = bus->p->drivers_kset;
-	error = kobject_init_and_add(&priv->kobj, &driver_ktype, NULL,
-				     "%s", drv->name);
-	if (error)
-		goto out_unregister;
-
-	if (drv->bus->p->drivers_autoprobe) {
-		error = driver_attach(drv);
-		if (error)
-			goto out_unregister;
-	}
-	klist_add_tail(&priv->knode_bus, &bus->p->klist_drivers);
-	module_add_driver(drv->owner, drv);
-
-	error = driver_create_file(drv, &driver_attr_uevent);
-	if (error) {
-		printk(KERN_ERR "%s: uevent attr (%s) failed\n",
-			__func__, drv->name);
-	}
-	error = driver_add_attrs(bus, drv);
-	if (error) {
-		/* How the hell do we get out of this pickle? Give up */
-		printk(KERN_ERR "%s: driver_add_attrs(%s) failed\n",
-			__func__, drv->name);
-	}
-	error = add_bind_files(drv);
-	if (error) {
-		/* Ditto */
-		printk(KERN_ERR "%s: add_bind_files(%s) failed\n",
-			__func__, drv->name);
-	}
-
-	kobject_uevent(&priv->kobj, KOBJ_ADD);
-	return error;
-out_unregister:
-	kobject_put(&priv->kobj);
-out_put_bus:
-	bus_put(bus);
-	return error;
-}
-
-/**
- * bus_remove_driver - delete driver from bus's knowledge.
- * @drv: driver.
- *
- * Detach the driver from the devices it controls, and remove
- * it from its bus's list of drivers. Finally, we drop the reference
- * to the bus we took in bus_add_driver().
- */
-void bus_remove_driver(struct device_driver *drv)
-{
-	if (!drv->bus)
-		return;
-
-	remove_bind_files(drv);
-	driver_remove_attrs(drv->bus, drv);
-	driver_remove_file(drv, &driver_attr_uevent);
-	klist_remove(&drv->p->knode_bus);
-	pr_debug("bus: '%s': remove driver %s\n", drv->bus->name, drv->name);
-	driver_detach(drv);
-	module_remove_driver(drv);
-	kobject_put(&drv->p->kobj);
-	bus_put(drv->bus);
-}
-
-/* Helper for bus_rescan_devices's iter */
-static int __must_check bus_rescan_devices_helper(struct device *dev,
-						  void *data)
-{
-	int ret = 0;
-
-	if (!dev->driver) {
-		if (dev->parent)	/* Needed for USB */
-			down(&dev->parent->sem);
-		ret = device_attach(dev);
-		if (dev->parent)
-			up(&dev->parent->sem);
-	}
-	return ret < 0 ? ret : 0;
-}
-
-/**
- * bus_rescan_devices - rescan devices on the bus for possible drivers
- * @bus: the bus to scan.
- *
- * This function will look for devices on the bus with no driver
- * attached and rescan it against existing drivers to see if it matches
- * any by calling device_attach() for the unbound devices.
- */
-int bus_rescan_devices(struct bus_type *bus)
-{
-	return bus_for_each_dev(bus, NULL, NULL, bus_rescan_devices_helper);
-}
-EXPORT_SYMBOL_GPL(bus_rescan_devices);
-
-/**
- * device_reprobe - remove driver for a device and probe for a new driver
- * @dev: the device to reprobe
- *
- * This function detaches the attached driver (if any) for the given
- * device and restarts the driver probing process.  It is intended
- * to use if probing criteria changed during a devices lifetime and
- * driver attachment should change accordingly.
- */
-int device_reprobe(struct device *dev)
-{
-	if (dev->driver) {
-		if (dev->parent)        /* Needed for USB */
-			down(&dev->parent->sem);
-		device_release_driver(dev);
-		if (dev->parent)
-			up(&dev->parent->sem);
-	}
-	return bus_rescan_devices_helper(dev, NULL);
-}
-EXPORT_SYMBOL_GPL(device_reprobe);
-
-/**
- * find_bus - locate bus by name.
- * @name: name of bus.
- *
- * Call kset_find_obj() to iterate over list of buses to
- * find a bus by name. Return bus if found.
- *
- * Note that kset_find_obj increments bus' reference count.
- */
-#if 0
-struct bus_type *find_bus(char *name)
-{
-	struct kobject *k = kset_find_obj(bus_kset, name);
-	return k ? to_bus(k) : NULL;
-}
-#endif  /*  0  */
-
-
-/**
- * bus_add_attrs - Add default attributes for this bus.
- * @bus: Bus that has just been registered.
- */
-
-static int bus_add_attrs(struct bus_type *bus)
-{
-	int error = 0;
-	int i;
-
-	if (bus->bus_attrs) {
-		for (i = 0; attr_name(bus->bus_attrs[i]); i++) {
-			error = bus_create_file(bus, &bus->bus_attrs[i]);
-			if (error)
-				goto err;
-		}
-	}
-done:
-	return error;
-err:
-	while (--i >= 0)
-		bus_remove_file(bus, &bus->bus_attrs[i]);
-	goto done;
-}
-
-static void bus_remove_attrs(struct bus_type *bus)
-{
-	int i;
-
-	if (bus->bus_attrs) {
-		for (i = 0; attr_name(bus->bus_attrs[i]); i++)
-			bus_remove_file(bus, &bus->bus_attrs[i]);
-	}
-}
-
-static void klist_devices_get(struct klist_node *n)
-{
-	struct device *dev = container_of(n, struct device, knode_bus);
-
-	get_device(dev);
-}
-
-static void klist_devices_put(struct klist_node *n)
-{
-	struct device *dev = container_of(n, struct device, knode_bus);
-
-	put_device(dev);
-}
-
-static ssize_t bus_uevent_store(struct bus_type *bus,
-				const char *buf, size_t count)
-{
-	enum kobject_action action;
-
-	if (kobject_action_type(buf, count, &action) == 0)
-		kobject_uevent(&bus->p->subsys.kobj, action);
-	return count;
-}
-static BUS_ATTR(uevent, S_IWUSR, NULL, bus_uevent_store);
-
-/**
- * bus_register - register a bus with the system.
- * @bus: bus.
- *
- * Once we have that, we registered the bus with the kobject
- * infrastructure, then register the children subsystems it has:
- * the devices and drivers that belong to the bus.
- */
-int bus_register(struct bus_type *bus)
-{
-	int retval;
-	struct bus_type_private *priv;
-
-	priv = kzalloc(sizeof(struct bus_type_private), GFP_KERNEL);
-	if (!priv)
-		return -ENOMEM;
-
-	priv->bus = bus;
-	bus->p = priv;
-
-	BLOCKING_INIT_NOTIFIER_HEAD(&priv->bus_notifier);
-
-	retval = kobject_set_name(&priv->subsys.kobj, "%s", bus->name);
-	if (retval)
-		goto out;
-
-	priv->subsys.kobj.kset = bus_kset;
-	priv->subsys.kobj.ktype = &bus_ktype;
-	priv->drivers_autoprobe = 1;
-
-	retval = kset_register(&priv->subsys);
-	if (retval)
-		goto out;
-
-	retval = bus_create_file(bus, &bus_attr_uevent);
-	if (retval)
-		goto bus_uevent_fail;
-
-	priv->devices_kset = kset_create_and_add("devices", NULL,
-						 &priv->subsys.kobj);
-	if (!priv->devices_kset) {
-		retval = -ENOMEM;
-		goto bus_devices_fail;
-	}
-
-	priv->drivers_kset = kset_create_and_add("drivers", NULL,
-						 &priv->subsys.kobj);
-	if (!priv->drivers_kset) {
-		retval = -ENOMEM;
-		goto bus_drivers_fail;
-	}
-
-	klist_init(&priv->klist_devices, klist_devices_get, klist_devices_put);
-	klist_init(&priv->klist_drivers, NULL, NULL);
-
-	retval = add_probe_files(bus);
-	if (retval)
-		goto bus_probe_files_fail;
-
-	retval = bus_add_attrs(bus);
-	if (retval)
-		goto bus_attrs_fail;
-
-	pr_debug("bus: '%s': registered\n", bus->name);
-	return 0;
-
-bus_attrs_fail:
-	remove_probe_files(bus);
-bus_probe_files_fail:
-	kset_unregister(bus->p->drivers_kset);
-bus_drivers_fail:
-	kset_unregister(bus->p->devices_kset);
-bus_devices_fail:
-	bus_remove_file(bus, &bus_attr_uevent);
-bus_uevent_fail:
-	kset_unregister(&bus->p->subsys);
-	kfree(bus->p);
-out:
-	return retval;
-}
-EXPORT_SYMBOL_GPL(bus_register);
-
-/**
- * bus_unregister - remove a bus from the system
- * @bus: bus.
- *
- * Unregister the child subsystems and the bus itself.
- * Finally, we call bus_put() to release the refcount
- */
-void bus_unregister(struct bus_type *bus)
-{
-	pr_debug("bus: '%s': unregistering\n", bus->name);
-	bus_remove_attrs(bus);
-	remove_probe_files(bus);
-	kset_unregister(bus->p->drivers_kset);
-	kset_unregister(bus->p->devices_kset);
-	bus_remove_file(bus, &bus_attr_uevent);
-	kset_unregister(&bus->p->subsys);
-	kfree(bus->p);
-}
-EXPORT_SYMBOL_GPL(bus_unregister);
-
-int bus_register_notifier(struct bus_type *bus, struct notifier_block *nb)
-{
-	return blocking_notifier_chain_register(&bus->p->bus_notifier, nb);
-}
-EXPORT_SYMBOL_GPL(bus_register_notifier);
-
-int bus_unregister_notifier(struct bus_type *bus, struct notifier_block *nb)
-{
-	return blocking_notifier_chain_unregister(&bus->p->bus_notifier, nb);
-}
-EXPORT_SYMBOL_GPL(bus_unregister_notifier);
-
-struct kset *bus_get_kset(struct bus_type *bus)
-{
-	return &bus->p->subsys;
-}
-EXPORT_SYMBOL_GPL(bus_get_kset);
-
-struct klist *bus_get_device_klist(struct bus_type *bus)
-{
-	return &bus->p->klist_devices;
-}
-EXPORT_SYMBOL_GPL(bus_get_device_klist);
-
-/*
- * Yes, this forcably breaks the klist abstraction temporarily.  It
- * just wants to sort the klist, not change reference counts and
- * take/drop locks rapidly in the process.  It does all this while
- * holding the lock for the list, so objects can't otherwise be
- * added/removed while we're swizzling.
- */
-static void device_insertion_sort_klist(struct device *a, struct list_head *list,
-					int (*compare)(const struct device *a,
-							const struct device *b))
-{
-	struct list_head *pos;
-	struct klist_node *n;
-	struct device *b;
-
-	list_for_each(pos, list) {
-		n = container_of(pos, struct klist_node, n_node);
-		b = container_of(n, struct device, knode_bus);
-		if (compare(a, b) <= 0) {
-			list_move_tail(&a->knode_bus.n_node,
-				       &b->knode_bus.n_node);
-			return;
-		}
-	}
-	list_move_tail(&a->knode_bus.n_node, list);
-}
-
-void bus_sort_breadthfirst(struct bus_type *bus,
-			   int (*compare)(const struct device *a,
-					  const struct device *b))
-{
-	LIST_HEAD(sorted_devices);
-	struct list_head *pos, *tmp;
-	struct klist_node *n;
-	struct device *dev;
-	struct klist *device_klist;
-
-	device_klist = bus_get_device_klist(bus);
-
-	spin_lock(&device_klist->k_lock);
-	list_for_each_safe(pos, tmp, &device_klist->k_list) {
-		n = container_of(pos, struct klist_node, n_node);
-		dev = container_of(n, struct device, knode_bus);
-		device_insertion_sort_klist(dev, &sorted_devices, compare);
-	}
-	list_splice(&sorted_devices, &device_klist->k_list);
-	spin_unlock(&device_klist->k_lock);
-}
-EXPORT_SYMBOL_GPL(bus_sort_breadthfirst);
-
-int __init buses_init(void)
-{
-	bus_kset = kset_create_and_add("bus", &bus_uevent_ops, NULL);
-	if (!bus_kset)
-		return -ENOMEM;
-	return 0;
-}