NULLDEV(9F) Kernel Functions for Drivers NULLDEV(9F)
nulldev - zero return function
#include <sys/conf.h>
#include <sys/ddi.h>
int nulldev();
Architecture independent level 1 (DDI/DKI).
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.
nulldev() returns a 0.
nulldev() can be called from any context.
nodev(9F), cb_ops(9S)
Writing Device Drivers
April 11, 1991 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)