void kref_init(struct kref *kref);
void kref_get(struct kref *kref);
-void kref_put(struct kref *kref, void (*release) (struct kref *kref));
+int kref_put(struct kref *kref, void (*release) (struct kref *kref));
#endif /* __KERNEL__ */
#endif /* _KREF_H_ */