nochpoll - error return function for non-pollable devices
#include <sys/ddi.h>
#include <sys/sunddi.h>
int nochpoll(dev_t dev, short events, int anyyet, short *reventsp,
struct pollhead **pollhdrp);
Solaris DDI specific (Solaris DDI).
Device number.
Event flags.
Check current events only.
Event flag pointer.
Poll head pointer.
The nochpoll() function is a routine that simply returns the value ENXIO. It is intended to be used in the cb_ops(9S) structure of a device driver for devices that do not support the poll(2) system call.
The nochpoll() function returns ENXIO.
The nochpoll() function can be called from user, interrupt, or kernel context.