driver core: move knode_driver into private structure

Nothing outside of the driver core should ever touch knode_driver, so
move it out of the public eye.

Cc: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

3 files changed, 22 insertions, 8 deletions

diff --git a/drivers/base/base.h b/drivers/base/base.h
index f5cf31c664d7..8af0bb2c0aa8 100644
--- a/drivers/base/base.h
+++ b/drivers/base/base.h
@@ -68,6 +68,7 @@ struct class_private {
  *
  * @klist_children - klist containing all children of this device
  * @knode_parent - node in sibling list
+ * @knode_driver - node in driver list
  * @device - pointer back to the struct class that this structure is
  * associated with.
  *
@@ -76,10 +77,13 @@ struct class_private {
 struct device_private {
         struct klist klist_children;
         struct klist_node knode_parent;
+        struct klist_node knode_driver;
         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)
 
 /* initialisation functions */
 extern int devices_init(void);
diff --git a/drivers/base/dd.c b/drivers/base/dd.c
index 17a8e45cf9c6..bb5f1eb83c03 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->knode_driver)) {
+        if (klist_node_attached(&dev->p->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->knode_driver, &dev->driver->p->klist_devices);
+        klist_add_tail(&dev->p->knode_driver, &dev->driver->p->klist_devices);
 }
 
 static int driver_sysfs_add(struct device *dev)
@@ -311,7 +311,7 @@ static void __device_release_driver(struct device *dev)
                         drv->remove(dev);
                 devres_release_all(dev);
                 dev->driver = NULL;
-                klist_remove(&dev->knode_driver);
+                klist_remove(&dev->p->knode_driver);
         }
 }
 
@@ -341,6 +341,7 @@ EXPORT_SYMBOL_GPL(device_release_driver);
  */
 void driver_detach(struct device_driver *drv)
 {
+        struct device_private *dev_prv;
         struct device *dev;
 
         for (;;) {
@@ -349,8 +350,10 @@ void driver_detach(struct device_driver *drv)
                         spin_unlock(&drv->p->klist_devices.k_lock);
                         break;
                 }
-                dev = list_entry(drv->p->klist_devices.k_list.prev,
-                                struct device, knode_driver.n_node);
+                dev_prv = list_entry(drv->p->klist_devices.k_list.prev,
+                                     struct device_private,
+                                     knode_driver.n_node);
+                dev = dev_prv->device;
                 get_device(dev);
                 spin_unlock(&drv->p->klist_devices.k_lock);
 
diff --git a/drivers/base/driver.c b/drivers/base/driver.c
index 1e2bda780e48..b76cc69f1106 100644
--- a/drivers/base/driver.c
+++ b/drivers/base/driver.c
@@ -19,7 +19,14 @@
 static struct device *next_device(struct klist_iter *i)
 {
         struct klist_node *n = klist_next(i);
-        return n ? container_of(n, struct device, knode_driver) : NULL;
+        struct device *dev = NULL;
+        struct device_private *dev_prv;
+
+        if (n) {
+                dev_prv = to_device_private_driver(n);
+                dev = dev_prv->device;
+        }
+        return dev;
 }
 
 /**
@@ -42,7 +49,7 @@ 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->knode_driver : NULL);
+                             start ? &start->p->knode_driver : NULL);
         while ((dev = next_device(&i)) && !error)
                 error = fn(dev, data);
         klist_iter_exit(&i);
@@ -76,7 +83,7 @@ struct device *driver_find_device(struct device_driver *drv,
                 return NULL;
 
         klist_iter_init_node(&drv->p->klist_devices, &i,
-                             (start ? &start->knode_driver : NULL));
+                             (start ? &start->p->knode_driver : NULL));
         while ((dev = next_device(&i)))
                 if (match(dev, data) && get_device(dev))
                         break;