1 files changed, 14 insertions, 1 deletions

diff --git a/include/linux/key.h b/include/linux/key.h
index b2bb01719561..6ea4eebd3467 100644
--- a/include/linux/key.h
+++ b/include/linux/key.h
@@ -9,7 +9,7 @@
  * 2 of the License, or (at your option) any later version.
  *
  *
- * See Documentation/keys.txt for information on keys/keyrings.
+ * See Documentation/security/keys.txt for information on keys/keyrings.
  */
 
 #ifndef _LINUX_KEY_H
@@ -276,6 +276,19 @@ static inline key_serial_t key_serial(struct key *key)
         return key ? key->serial : 0;
 }
 
+/**
+ * key_is_instantiated - Determine if a key has been positively instantiated
+ * @key: The key to check.
+ *
+ * Return true if the specified key has been positively instantiated, false
+ * otherwise.
+ */
+static inline bool key_is_instantiated(const struct key *key)
+{
+        return test_bit(KEY_FLAG_INSTANTIATED, &key->flags) &&
+                !test_bit(KEY_FLAG_NEGATIVE, &key->flags);
+}
+
 #define rcu_dereference_key(KEY)                                        \
         (rcu_dereference_protected((KEY)->payload.rcudata,              \
                                    rwsem_is_locked(&((struct key *)(KEY))->sem)))