/* * Do a wakeup when a selectable event occurs. Concurrency issues: * * As per selrecord(), the caller's object lock is held. If there * is a named waiter, we must acquire the associated selcluster's lock * in order to synchronize with selclear() and pollers going to sleep * in sel_do_scan(). * * sip->sel_cluser cannot change at this point, as it is only changed * in selrecord(), and concurrent calls to selrecord() are locked * out by the caller. */