KEYS: struct key_preparsed_payload should have two payload pointers

struct key_preparsed_payload should have two payload pointers to correspond
with those in struct key.

Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Steve Dickson <steved@redhat.com>
Acked-by: Jeff Layton <jlayton@primarydata.com>
Reviewed-by: Sage Weil <sage@redhat.com>

security/keys/encrypted-keys/encrypted.c

@@ -811,7 +811,7 @@ static int encrypted_instantiate(struct key *key,
 		goto out;
 	}
 
-	rcu_assign_keypointer(key, epayload);
+	prep->payload[0] = epayload;
 out:
 	kfree(datablob);
 	return ret;