+extern int __key_link_begin(struct key *keyring,
+ const struct key_type *type,
+ const char *description,
+ struct keyring_list **_prealloc);
+extern int __key_link_check_live_key(struct key *keyring, struct key *key);
+extern void __key_link(struct key *keyring, struct key *key,
+ struct keyring_list **_prealloc);
+extern void __key_link_end(struct key *keyring,
+ struct key_type *type,
+ struct keyring_list *prealloc);