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, 9 insertions, 0 deletions

diff --git a/drivers/base/core.c b/drivers/base/core.c
index 059966b617f..16d85991010 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 = {
@@ -859,6 +861,13 @@ int device_add(struct device *dev)
         if (!dev)
                 goto done;
 
+        dev->p = kzalloc(sizeof(*dev->p), GFP_KERNEL);
+        if (!dev->p) {
+                error = -ENOMEM;
+                goto done;
+        }
+        dev->p->device = dev;
+
         /*
          * for statically allocated devices, which should all be converted
          * some day, we need to initialize the name. We prevent reading back