centos man page for datagram_poll

DATAGRAM_POLL(9)						 Linux Networking						  DATAGRAM_POLL(9)

NAME
       datagram_poll - generic datagram poll

SYNOPSIS
       unsigned int datagram_poll(struct file * file, struct socket * sock, poll_table * wait);

ARGUMENTS
       file
	   file struct

       sock
	   socket

       wait
	   poll table

DATAGRAM POLL
       Again totally generic. This also handles sequenced packet sockets providing the socket receive queue is only ever holding data ready to
       receive.

NOTE
       when you _don't_ use this routine for this protocol, and you use a different write policy from sock_writeable then please supply your own
       write_space callback.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014							  DATAGRAM_POLL(9)