RXRPC_CALL_HAS_USERID
set_bit(RXRPC_CALL_HAS_USERID, &call->flags);
__set_bit(RXRPC_CALL_HAS_USERID, &call->flags);
if (test_and_clear_bit(RXRPC_CALL_HAS_USERID, &call->flags)) {
if (!test_bit(RXRPC_CALL_HAS_USERID, &call->flags))