--- zzzz-none-000/linux-3.10.107/crypto/asymmetric_keys/public_key.h	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/crypto/asymmetric_keys/public_key.h	2021-02-04 17:41:59.000000000 +0000
@@ -28,3 +28,9 @@
 };
 
 extern const struct public_key_algorithm RSA_public_key_algorithm;
+
+/*
+ * public_key.c
+ */
+extern int public_key_verify_signature(const struct public_key *pk,
+				       const struct public_key_signature *sig);