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);
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 = {
static void klist_children_get(struct klist_node *n)
{
- struct device_private *p = to_device_private_parent(n);
- struct device *dev = p->device;
+ struct device *dev = container_of(n, struct device, knode_parent);
get_device(dev);
}
static void klist_children_put(struct klist_node *n)
{
- struct device_private *p = to_device_private_parent(n);
- struct device *dev = p->device;
+ struct device *dev = container_of(n, struct device, knode_parent);
put_device(dev);
}
*/
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->p->klist_children, klist_children_get,
+ klist_init(&dev->klist_children, klist_children_get,
klist_children_put);
INIT_LIST_HEAD(&dev->dma_pools);
init_MUTEX(&dev->sem);
int dev_set_name(struct device *dev, const char *fmt, ...)
{
va_list vargs;
+ char *s;
va_start(vargs, fmt);
vsnprintf(dev->bus_id, sizeof(dev->bus_id), fmt, vargs);
va_end(vargs);
+
+ /* ewww... some of these buggers have / in the name... */
+ while ((s = strchr(dev->bus_id, '/')))
+ *s = '!';
+
return 0;
}
EXPORT_SYMBOL_GPL(dev_set_name);
kobject_uevent(&dev->kobj, KOBJ_ADD);
bus_attach_device(dev);
if (parent)
- klist_add_tail(&dev->p->knode_parent,
- &parent->p->klist_children);
+ klist_add_tail(&dev->knode_parent, &parent->klist_children);
if (dev->class) {
mutex_lock(&dev->class->p->class_mutex);
device_pm_remove(dev);
dpm_sysfs_remove(dev);
if (parent)
- klist_del(&dev->p->knode_parent);
+ klist_del(&dev->knode_parent);
if (MAJOR(dev->devt)) {
device_remove_sys_dev_entry(dev);
device_remove_file(dev, &devt_attr);
static struct device *next_device(struct klist_iter *i)
{
struct klist_node *n = klist_next(i);
- struct device *dev = NULL;
- struct device_private *p;
-
- if (n) {
- p = to_device_private_parent(n);
- dev = p->device;
- }
- return dev;
+ return n ? container_of(n, struct device, knode_parent) : NULL;
}
/**
struct device *child;
int error = 0;
- klist_iter_init(&parent->p->klist_children, &i);
+ klist_iter_init(&parent->klist_children, &i);
while ((child = next_device(&i)) && !error)
error = fn(child, data);
klist_iter_exit(&i);
if (!parent)
return NULL;
- klist_iter_init(&parent->p->klist_children, &i);
+ klist_iter_init(&parent->klist_children, &i);
while ((child = next_device(&i)))
if (match(child, data) && get_device(child))
break;
EXPORT_SYMBOL_GPL(device_create_file);
EXPORT_SYMBOL_GPL(device_remove_file);
+struct root_device
+{
+ struct device dev;
+ struct module *owner;
+};
+
+#define to_root_device(dev) container_of(dev, struct root_device, dev)
+
+static void root_device_release(struct device *dev)
+{
+ kfree(to_root_device(dev));
+}
+
+/**
+ * __root_device_register - allocate and register a root device
+ * @name: root device name
+ * @owner: owner module of the root device, usually THIS_MODULE
+ *
+ * This function allocates a root device and registers it
+ * using device_register(). In order to free the returned
+ * device, use root_device_unregister().
+ *
+ * Root devices are dummy devices which allow other devices
+ * to be grouped under /sys/devices. Use this function to
+ * allocate a root device and then use it as the parent of
+ * any device which should appear under /sys/devices/{name}
+ *
+ * The /sys/devices/{name} directory will also contain a
+ * 'module' symlink which points to the @owner directory
+ * in sysfs.
+ *
+ * Note: You probably want to use root_device_register().
+ */
+struct device *__root_device_register(const char *name, struct module *owner)
+{
+ struct root_device *root;
+ int err = -ENOMEM;
+
+ root = kzalloc(sizeof(struct root_device), GFP_KERNEL);
+ if (!root)
+ return ERR_PTR(err);
+
+ err = dev_set_name(&root->dev, name);
+ if (err) {
+ kfree(root);
+ return ERR_PTR(err);
+ }
+
+ root->dev.release = root_device_release;
+
+ err = device_register(&root->dev);
+ if (err) {
+ put_device(&root->dev);
+ return ERR_PTR(err);
+ }
+
+#ifdef CONFIG_MODULE /* gotta find a "cleaner" way to do this */
+ if (owner) {
+ struct module_kobject *mk = &owner->mkobj;
+
+ err = sysfs_create_link(&root->dev.kobj, &mk->kobj, "module");
+ if (err) {
+ device_unregister(&root->dev);
+ return ERR_PTR(err);
+ }
+ root->owner = owner;
+ }
+#endif
+
+ return &root->dev;
+}
+EXPORT_SYMBOL_GPL(__root_device_register);
+
+/**
+ * root_device_unregister - unregister and free a root device
+ * @dev: device going away
+ *
+ * This function unregisters and cleans up a device that was created by
+ * root_device_register().
+ */
+void root_device_unregister(struct device *dev)
+{
+ struct root_device *root = to_root_device(dev);
+
+ if (root->owner)
+ sysfs_remove_link(&root->dev.kobj, "module");
+
+ device_unregister(dev);
+}
+EXPORT_SYMBOL_GPL(root_device_unregister);
+
static void device_create_release(struct device *dev)
{
old_parent = dev->parent;
dev->parent = new_parent;
if (old_parent)
- klist_remove(&dev->p->knode_parent);
+ klist_remove(&dev->knode_parent);
if (new_parent) {
- klist_add_tail(&dev->p->knode_parent,
- &new_parent->p->klist_children);
+ klist_add_tail(&dev->knode_parent, &new_parent->klist_children);
set_dev_node(dev, dev_to_node(new_parent));
}
device_move_class_links(dev, new_parent, old_parent);
if (!kobject_move(&dev->kobj, &old_parent->kobj)) {
if (new_parent)
- klist_remove(&dev->p->knode_parent);
+ klist_remove(&dev->knode_parent);
dev->parent = old_parent;
if (old_parent) {
- klist_add_tail(&dev->p->knode_parent,
- &old_parent->p->klist_children);
+ klist_add_tail(&dev->knode_parent,
+ &old_parent->klist_children);
set_dev_node(dev, dev_to_node(old_parent));
}
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff