POLLWRBAND
bits |= POLLWRBAND;
if (bev & POLLWRBAND)
#define EPOLLWRBAND POLLWRBAND
POLLWRBAND|POLLERR|POLLHUP|POLLNVAL)
POLLRDBAND | POLLWRBAND),
case POLLWRBAND:
X(POLLWRBAND) X(POLLINIGNEOF) X(POLLRDHUP) XEND