5 files changed, 34 insertions, 103 deletions

diff --git a/drivers/base/base.h b/drivers/base/base.h
index b676f8f801f..0a5f055dffb 100644
--- a/drivers/base/base.h
+++ b/drivers/base/base.h
@@ -63,32 +63,6 @@ struct class_private {
 #define to_class(obj)   \
         container_of(obj, struct class_private, class_subsys.kobj)
 
-/**
- * struct device_private - structure to hold the private to the driver core portions of the device structure.
- *
- * @klist_children - klist containing all children of this device
- * @knode_parent - node in sibling list
- * @knode_driver - node in driver list
- * @knode_bus - node in bus list
- * @device - pointer back to the struct class that this structure is
- * associated with.
- *
- * Nothing outside of the driver core should ever touch these fields.
- */
-struct device_private {
-        struct klist klist_children;
-        struct klist_node knode_parent;
-        struct klist_node knode_driver;
-        struct klist_node knode_bus;
-        struct device *device;
-};
-#define to_device_private_parent(obj)   \
-        container_of(obj, struct device_private, knode_parent)
-#define to_device_private_driver(obj)   \
-        container_of(obj, struct device_private, knode_driver)
-#define to_device_private_bus(obj)      \
-        container_of(obj, struct device_private, knode_bus)
-
 /* initialisation functions */
 extern int devices_init(void);
 extern int buses_init(void);
diff --git a/drivers/base/bus.c b/drivers/base/bus.c
index 0f0a5044467..83f32b891fa 100644
--- a/drivers/base/bus.c
+++ b/drivers/base/bus.c
@@ -253,14 +253,7 @@ static ssize_t store_drivers_probe(struct bus_type *bus,
 static struct device *next_device(struct klist_iter *i)
 {
         struct klist_node *n = klist_next(i);
-        struct device *dev = NULL;
-        struct device_private *dev_prv;
-
-        if (n) {
-                dev_prv = to_device_private_bus(n);
-                dev = dev_prv->device;
-        }
-        return dev;
+        return n ? container_of(n, struct device, knode_bus) : NULL;
 }
 
 /**
@@ -293,7 +286,7 @@ int bus_for_each_dev(struct bus_type *bus, struct device *start,
                 return -EINVAL;
 
         klist_iter_init_node(&bus->p->klist_devices, &i,
-                             (start ? &start->p->knode_bus : NULL));
+                             (start ? &start->knode_bus : NULL));
         while ((dev = next_device(&i)) && !error)
                 error = fn(dev, data);
         klist_iter_exit(&i);
@@ -327,7 +320,7 @@ struct device *bus_find_device(struct bus_type *bus,
                 return NULL;
 
         klist_iter_init_node(&bus->p->klist_devices, &i,
-                             (start ? &start->p->knode_bus : NULL));
+                             (start ? &start->knode_bus : NULL));
         while ((dev = next_device(&i)))
                 if (match(dev, data) && get_device(dev))
                         break;
@@ -514,8 +507,7 @@ void bus_attach_device(struct device *dev)
                         ret = device_attach(dev);
                 WARN_ON(ret < 0);
                 if (ret >= 0)
-                        klist_add_tail(&dev->p->knode_bus,
-                                       &bus->p->klist_devices);
+                        klist_add_tail(&dev->knode_bus, &bus->p->klist_devices);
         }
 }
 
@@ -536,8 +528,8 @@ void bus_remove_device(struct device *dev)
                 sysfs_remove_link(&dev->bus->p->devices_kset->kobj,
                                   dev_name(dev));
                 device_remove_attrs(dev->bus, dev);
-                if (klist_node_attached(&dev->p->knode_bus))
-                        klist_del(&dev->p->knode_bus);
+                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));
@@ -839,16 +831,14 @@ static void bus_remove_attrs(struct bus_type *bus)
 
 static void klist_devices_get(struct klist_node *n)
 {
-        struct device_private *dev_prv = to_device_private_bus(n);
-        struct device *dev = dev_prv->device;
+        struct device *dev = container_of(n, struct device, knode_bus);
 
         get_device(dev);
 }
 
 static void klist_devices_put(struct klist_node *n)
 {
-        struct device_private *dev_prv = to_device_private_bus(n);
-        struct device *dev = dev_prv->device;
+        struct device *dev = container_of(n, struct device, knode_bus);
 
         put_device(dev);
 }
@@ -1003,20 +993,18 @@ static void device_insertion_sort_klist(struct device *a, struct list_head *list
 {
         struct list_head *pos;
         struct klist_node *n;
-        struct device_private *dev_prv;
         struct device *b;
 
         list_for_each(pos, list) {
                 n = container_of(pos, struct klist_node, n_node);
-                dev_prv = to_device_private_bus(n);
-                b = dev_prv->device;
+                b = container_of(n, struct device, knode_bus);
                 if (compare(a, b) <= 0) {
-                        list_move_tail(&a->p->knode_bus.n_node,
-                                       &b->p->knode_bus.n_node);
+                        list_move_tail(&a->knode_bus.n_node,
+                                       &b->knode_bus.n_node);
                         return;
                 }
         }
-        list_move_tail(&a->p->knode_bus.n_node, list);
+        list_move_tail(&a->knode_bus.n_node, list);
 }
 
 void bus_sort_breadthfirst(struct bus_type *bus,
@@ -1026,7 +1014,6 @@ void bus_sort_breadthfirst(struct bus_type *bus,
         LIST_HEAD(sorted_devices);
         struct list_head *pos, *tmp;
         struct klist_node *n;
-        struct device_private *dev_prv;
         struct device *dev;
         struct klist *device_klist;
 
@@ -1035,8 +1022,7 @@ void bus_sort_breadthfirst(struct bus_type *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_prv = to_device_private_bus(n);
-                dev = dev_prv->device;
+                dev = container_of(n, struct device, knode_bus);
                 device_insertion_sort_klist(dev, &sorted_devices, compare);
         }
         list_splice(&sorted_devices, &device_klist->k_list);
diff --git a/drivers/base/core.c b/drivers/base/core.c
index 61df508fa62..8079afca497 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -109,7 +109,6 @@ static struct sysfs_ops dev_sysfs_ops = {
 static void device_release(struct kobject *kobj)
 {
         struct device *dev = to_dev(kobj);
-        struct device_private *p = dev->p;
 
         if (dev->release)
                 dev->release(dev);
@@ -121,7 +120,6 @@ static void device_release(struct kobject *kobj)
                 WARN(1, KERN_ERR "Device '%s' does not have a release() "
                         "function, it is broken and must be fixed.\n",
                         dev_name(dev));
-        kfree(p);
 }
 
 static struct kobj_type device_ktype = {
@@ -509,16 +507,14 @@ EXPORT_SYMBOL_GPL(device_schedule_callback_owner);
 
 static void klist_children_get(struct klist_node *n)
 {
-        struct device_private *p = to_device_private_parent(n);
-        struct device *dev = p->device;
+        struct device *dev = container_of(n, struct device, knode_parent);
 
         get_device(dev);
 }
 
 static void klist_children_put(struct klist_node *n)
 {
-        struct device_private *p = to_device_private_parent(n);
-        struct device *dev = p->device;
+        struct device *dev = container_of(n, struct device, knode_parent);
 
         put_device(dev);
 }
@@ -540,15 +536,9 @@ static void klist_children_put(struct klist_node *n)
  */
 void device_initialize(struct device *dev)
 {
-        dev->p = kzalloc(sizeof(*dev->p), GFP_KERNEL);
-        if (!dev->p) {
-                WARN_ON(1);
-                return;
-        }
-        dev->p->device = dev;
         dev->kobj.kset = devices_kset;
         kobject_init(&dev->kobj, &device_ktype);
-        klist_init(&dev->p->klist_children, klist_children_get,
+        klist_init(&dev->klist_children, klist_children_get,
                    klist_children_put);
         INIT_LIST_HEAD(&dev->dma_pools);
         init_MUTEX(&dev->sem);
@@ -932,8 +922,7 @@ int device_add(struct device *dev)
         kobject_uevent(&dev->kobj, KOBJ_ADD);
         bus_attach_device(dev);
         if (parent)
-                klist_add_tail(&dev->p->knode_parent,
-                               &parent->p->klist_children);
+                klist_add_tail(&dev->knode_parent, &parent->klist_children);
 
         if (dev->class) {
                 mutex_lock(&dev->class->p->class_mutex);
@@ -1047,7 +1036,7 @@ void device_del(struct device *dev)
         device_pm_remove(dev);
         dpm_sysfs_remove(dev);
         if (parent)
-                klist_del(&dev->p->knode_parent);
+                klist_del(&dev->knode_parent);
         if (MAJOR(dev->devt)) {
                 device_remove_sys_dev_entry(dev);
                 device_remove_file(dev, &devt_attr);
@@ -1108,14 +1097,7 @@ void device_unregister(struct device *dev)
 static struct device *next_device(struct klist_iter *i)
 {
         struct klist_node *n = klist_next(i);
-        struct device *dev = NULL;
-        struct device_private *p;
-
-        if (n) {
-                p = to_device_private_parent(n);
-                dev = p->device;
-        }
-        return dev;
+        return n ? container_of(n, struct device, knode_parent) : NULL;
 }
 
 /**
@@ -1137,7 +1119,7 @@ int device_for_each_child(struct device *parent, void *data,
         struct device *child;
         int error = 0;
 
-        klist_iter_init(&parent->p->klist_children, &i);
+        klist_iter_init(&parent->klist_children, &i);
         while ((child = next_device(&i)) && !error)
                 error = fn(child, data);
         klist_iter_exit(&i);
@@ -1168,7 +1150,7 @@ struct device *device_find_child(struct device *parent, void *data,
         if (!parent)
                 return NULL;
 
-        klist_iter_init(&parent->p->klist_children, &i);
+        klist_iter_init(&parent->klist_children, &i);
         while ((child = next_device(&i)))
                 if (match(child, data) && get_device(child))
                         break;
@@ -1582,10 +1564,9 @@ int device_move(struct device *dev, struct device *new_parent)
         old_parent = dev->parent;
         dev->parent = new_parent;
         if (old_parent)
-                klist_remove(&dev->p->knode_parent);
+                klist_remove(&dev->knode_parent);
         if (new_parent) {
-                klist_add_tail(&dev->p->knode_parent,
-                               &new_parent->p->klist_children);
+                klist_add_tail(&dev->knode_parent, &new_parent->klist_children);
                 set_dev_node(dev, dev_to_node(new_parent));
         }
 
@@ -1597,11 +1578,11 @@ int device_move(struct device *dev, struct device *new_parent)
                 device_move_class_links(dev, new_parent, old_parent);
                 if (!kobject_move(&dev->kobj, &old_parent->kobj)) {
                         if (new_parent)
-                                klist_remove(&dev->p->knode_parent);
+                                klist_remove(&dev->knode_parent);
                         dev->parent = old_parent;
                         if (old_parent) {
-                                klist_add_tail(&dev->p->knode_parent,
-                                               &old_parent->p->klist_children);
+                                klist_add_tail(&dev->knode_parent,
+                                               &old_parent->klist_children);
                                 set_dev_node(dev, dev_to_node(old_parent));
                         }
                 }
diff --git a/drivers/base/dd.c b/drivers/base/dd.c
index 6fdaf76f033..315bed8d5e7 100644
--- a/drivers/base/dd.c
+++ b/drivers/base/dd.c
@@ -28,7 +28,7 @@
 
 static void driver_bound(struct device *dev)
 {
-        if (klist_node_attached(&dev->p->knode_driver)) {
+        if (klist_node_attached(&dev->knode_driver)) {
                 printk(KERN_WARNING "%s: device %s already bound\n",
                         __func__, kobject_name(&dev->kobj));
                 return;
@@ -41,7 +41,7 @@ static void driver_bound(struct device *dev)
                 blocking_notifier_call_chain(&dev->bus->p->bus_notifier,
                                              BUS_NOTIFY_BOUND_DRIVER, dev);
 
-        klist_add_tail(&dev->p->knode_driver, &dev->driver->p->klist_devices);
+        klist_add_tail(&dev->knode_driver, &dev->driver->p->klist_devices);
 }
 
 static int driver_sysfs_add(struct device *dev)
@@ -310,7 +310,7 @@ static void __device_release_driver(struct device *dev)
                         drv->remove(dev);
                 devres_release_all(dev);
                 dev->driver = NULL;
-                klist_remove(&dev->p->knode_driver);
+                klist_remove(&dev->knode_driver);
         }
 }
 
@@ -340,7 +340,6 @@ EXPORT_SYMBOL_GPL(device_release_driver);
  */
 void driver_detach(struct device_driver *drv)
 {
-        struct device_private *dev_prv;
         struct device *dev;
 
         for (;;) {
@@ -349,10 +348,8 @@ void driver_detach(struct device_driver *drv)
                         spin_unlock(&drv->p->klist_devices.k_lock);
                         break;
                 }
-                dev_prv = list_entry(drv->p->klist_devices.k_list.prev,
-                                     struct device_private,
-                                     knode_driver.n_node);
-                dev = dev_prv->device;
+                dev = list_entry(drv->p->klist_devices.k_list.prev,
+                                struct device, knode_driver.n_node);
                 get_device(dev);
                 spin_unlock(&drv->p->klist_devices.k_lock);
 
diff --git a/drivers/base/driver.c b/drivers/base/driver.c
index b76cc69f110..1e2bda780e4 100644
--- a/drivers/base/driver.c
+++ b/drivers/base/driver.c
@@ -19,14 +19,7 @@
 static struct device *next_device(struct klist_iter *i)
 {
         struct klist_node *n = klist_next(i);
-        struct device *dev = NULL;
-        struct device_private *dev_prv;
-
-        if (n) {
-                dev_prv = to_device_private_driver(n);
-                dev = dev_prv->device;
-        }
-        return dev;
+        return n ? container_of(n, struct device, knode_driver) : NULL;
 }
 
 /**
@@ -49,7 +42,7 @@ int driver_for_each_device(struct device_driver *drv, struct device *start,
                 return -EINVAL;
 
         klist_iter_init_node(&drv->p->klist_devices, &i,
-                             start ? &start->p->knode_driver : NULL);
+                             start ? &start->knode_driver : NULL);
         while ((dev = next_device(&i)) && !error)
                 error = fn(dev, data);
         klist_iter_exit(&i);
@@ -83,7 +76,7 @@ struct device *driver_find_device(struct device_driver *drv,
                 return NULL;
 
         klist_iter_init_node(&drv->p->klist_devices, &i,
-                             (start ? &start->p->knode_driver : NULL));
+                             (start ? &start->knode_driver : NULL));
         while ((dev = next_device(&i)))
                 if (match(dev, data) && get_device(dev))
                         break;