restrict_link_by_signature 41 certs/system_keyring.c return restrict_link_by_signature(dest_keyring, type, payload, restrict_link_by_signature 69 certs/system_keyring.c return restrict_link_by_signature(dest_keyring, type, payload, restrict_link_by_signature 57 include/crypto/public_key.h extern int restrict_link_by_signature(struct key *dest_keyring,