Documentation/core-api/kref.rst

28 	struct kref refcount;
46      kref_init(&data->refcount);
48 This sets the refcount in the kref to 1.
58    increment the refcount with kref_get() before passing it off::
60        kref_get(&data->refcount);
63    refcount cannot go to zero) you may do this without a lock.
67        kref_put(&data->refcount, data_release);
85 	struct my_data *data = container_of(ref, struct my_data, refcount);
95 	kref_put(&data->refcount, data_release);
106 	kref_init(&data->refcount);
108 	kref_get(&data->refcount);
112 	        kref_put(&data->refcount, data_release);
120 	kref_put(&data->refcount, data_release);
127 since we already have a valid pointer that we own a refcount for.  The
144 		kref_get(&data->refcount);
166 	/* We are done with obj, so we pass our refcount off
180 		struct kref      refcount;
190 			kref_get(&entry->refcount);
198 		struct my_data *entry = container_of(ref, struct my_data, refcount);
207 		kref_put(&entry->refcount, release_entry);
224 		if (kref_put(&entry->refcount, release_entry)) {
246 			if (!kref_get_unless_zero(&entry->refcount))
255 		struct my_data *entry = container_of(ref, struct my_data, refcount);
265 		kref_put(&entry->refcount, release_entry);
286 		struct kref refcount;
297 			if (!kref_get_unless_zero(&entry->refcount))
306 		struct my_data *entry = container_of(ref, struct my_data, refcount);
316 		kref_put(&entry->refcount, release_entry_rcu);