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);
illumos DDI specific (illumos DDI).
dev
Device number.
events
Event flags.
anyyet
Check current events only.
reventsp
Event flag pointer.
pollhdrp
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.