SEL_RESET
l->l_selflag = SEL_RESET;
if (__predict_true(l->l_selflag == SEL_RESET)) {
l->l_selflag = SEL_RESET;
curlwp->l_selflag = SEL_RESET;
if (selector->l_selflag == SEL_RESET) {
if (__predict_false(events == 0 || oflag == SEL_RESET)) {
l->l_selflag = SEL_RESET;
l->l_selflag = SEL_RESET;