I started writing this code, but I ran into an issue where:

	lock = gen_expression_from_key(arg, key);

doesnt' work.  The arg is "&icom_port->uart_port" and the key is
"&$->lock".  The check_locking.c code does this as strings, but I want
to do this as expressions...  Anyway, here's the code that I have so
far.

regards,
dan carpenter