NULLDEV(9F) Kernel Functions for Drivers NULLDEV(9F)


NAME


nulldev - zero return function

SYNOPSIS


#include <sys/conf.h>
#include <sys/ddi.h>


int nulldev();


INTERFACE LEVEL


Architecture independent level 1 (DDI/DKI).

DESCRIPTION


nulldev() returns 0. It is intended to be used in the cb_ops(9S) data
structure of a device driver for device entry points that do nothing.

RETURN VALUES


nulldev() returns a 0.

CONTEXT


nulldev() can be called from any context.

SEE ALSO


nodev(9F), cb_ops(9S)


Writing Device Drivers


April 11, 1991 NULLDEV(9F)