diff options
| -rw-r--r-- | drivers/base/base.h | 12 | ||||
| -rw-r--r-- | drivers/base/core.c | 8 | ||||
| -rw-r--r-- | include/linux/device.h | 3 |
3 files changed, 23 insertions, 0 deletions
diff --git a/drivers/base/base.h b/drivers/base/base.h index 0a5f055dffb..6b20809b5fd 100644 --- a/drivers/base/base.h +++ b/drivers/base/base.h @@ -63,6 +63,18 @@ 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. + * + * @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 device *device; +}; + /* initialisation functions */ extern int devices_init(void); extern int buses_init(void); diff --git a/drivers/base/core.c b/drivers/base/core.c index 14aa2b6953c..6657787e64f 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, diff --git a/include/linux/device.h b/include/linux/device.h index 4e14fad4143..d6d34084fd3 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -28,6 +28,7 @@ #define BUS_ID_SIZE 20 struct device; +struct device_private; struct device_driver; struct driver_private; struct class; @@ -371,6 +372,8 @@ struct device { struct klist_node knode_bus; struct device *parent; + struct device_private *p; + struct kobject kobj; char bus_id[BUS_ID_SIZE]; /* position on parent bus */ unsigned uevent_suppress:1; |