polllock
if (polllock(&stp->sd_pollist, &fn_lock->flk_lock) != 0) {
if (polllock(php, &pty->ptc_lock) != 0) {
if (polllock(&stp->sd_pollist, QLOCK(tq)) != 0) {
if (polllock(&stp->sd_pollist,
if (polllock(&stp->sd_pollist,
if (polllock(&stp->sd_pollist, &stp->sd_lock) != 0) {
if (polllock(&stp->sd_pollist, &stp->sd_lock) != 0) {
extern int polllock(pollhead_t *, kmutex_t *);