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