forked from luck/tmp_suning_uos_patched
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>
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@ -63,6 +63,18 @@ struct class_private {
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#define to_class(obj) \
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container_of(obj, struct class_private, class_subsys.kobj)
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/**
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* struct device_private - structure to hold the private to the driver core portions of the device structure.
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*
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* @device - pointer back to the struct class that this structure is
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* associated with.
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*
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* Nothing outside of the driver core should ever touch these fields.
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*/
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struct device_private {
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struct device *device;
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};
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/* initialisation functions */
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extern int devices_init(void);
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extern int buses_init(void);
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@ -109,6 +109,7 @@ static struct sysfs_ops dev_sysfs_ops = {
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static void device_release(struct kobject *kobj)
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{
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struct device *dev = to_dev(kobj);
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struct device_private *p = dev->p;
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if (dev->release)
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dev->release(dev);
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@ -120,6 +121,7 @@ static void device_release(struct kobject *kobj)
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WARN(1, KERN_ERR "Device '%s' does not have a release() "
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"function, it is broken and must be fixed.\n",
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dev_name(dev));
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kfree(p);
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}
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static struct kobj_type device_ktype = {
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@ -536,6 +538,12 @@ static void klist_children_put(struct klist_node *n)
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*/
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void device_initialize(struct device *dev)
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{
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dev->p = kzalloc(sizeof(*dev->p), GFP_KERNEL);
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if (!dev->p) {
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WARN_ON(1);
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return;
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}
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dev->p->device = dev;
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dev->kobj.kset = devices_kset;
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kobject_init(&dev->kobj, &device_ktype);
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klist_init(&dev->klist_children, klist_children_get,
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@ -28,6 +28,7 @@
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#define BUS_ID_SIZE 20
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struct device;
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struct device_private;
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struct device_driver;
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struct driver_private;
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struct class;
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@ -371,6 +372,8 @@ struct device {
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struct klist_node knode_bus;
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struct device *parent;
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struct device_private *p;
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struct kobject kobj;
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char bus_id[BUS_ID_SIZE]; /* position on parent bus */
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unsigned uevent_suppress:1;
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