driver core: create a private portion of struct device

This is to be used to move things out of struct device that no code
outside of the driver core should ever touch.

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

1 files changed, 8 insertions, 0 deletions

diff --git a/drivers/base/core.c b/drivers/base/core.c
index 14aa2b6953c9..6657787e64f8 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -109,6 +109,7 @@ 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);
@@ -120,6 +121,7 @@ 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 = {
@@ -536,6 +538,12 @@ 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->klist_children, klist_children_get,