Hi Friends, I found the below macro definition in include/linux/const.h #define _AC(X,Y) (X##Y) What exactly this means, as far as i know there is no operator by the symbol ## Can anyone please help me ?. Regards, Shameem -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ