dlm: use wait_event_timeout

 * (LS_RECOVERY_STOP set due to failure of a node in ls_nodes).  When another

 * function thinks it could have completed the waited-on task, they should wake

 * up ls_wait_general to get an immediate response rather than waiting for the

 * timer to detect the result.  A timer wakes us up periodically while waiting

 * to see if we should abort due to a node failure.  This should only be called

 * by the dlm_recoverd thread.

 * timeout.  This uses a timeout so it can check periodically if the wait

 * should abort due to node failure (which doesn't cause a wake_up).

 * This should only be called by the dlm_recoverd thread.

 */

static void dlm_wait_timer_fn(unsigned long data)

{

	struct dlm_ls *ls = (struct dlm_ls *) data;

	mod_timer(&ls->ls_timer, jiffies + (dlm_config.ci_recover_timer * HZ));

	wake_up(&ls->ls_wait_general);

}

int dlm_wait_function(struct dlm_ls *ls, int (*testfn) (struct dlm_ls *ls))

{

	int error = 0;

	int rv;

	init_timer(&ls->ls_timer);

	ls->ls_timer.function = dlm_wait_timer_fn;

	ls->ls_timer.data = (long) ls;

	ls->ls_timer.expires = jiffies + (dlm_config.ci_recover_timer * HZ);

	add_timer(&ls->ls_timer);

	wait_event(ls->ls_wait_general, testfn(ls) || dlm_recovery_stopped(ls));

	del_timer_sync(&ls->ls_timer);

	while (1) {

		rv = wait_event_timeout(ls->ls_wait_general,

					testfn(ls) || dlm_recovery_stopped(ls),

					dlm_config.ci_recover_timer * HZ);

		if (rv)

			break;

	}

	if (dlm_recovery_stopped(ls)) {

		log_debug(ls, "dlm_wait_function aborted");