KN_ACTIVE
if ((kn->kn_status & KN_ACTIVE) == 0) {
kn->kn_status &= ~(KN_ACTIVE|KN_BUSY);
kn->kn_status &= ~(KN_ACTIVE|KN_BUSY);
kn->kn_status &= ~(KN_ACTIVE|KN_BUSY);
if ((kn->kn_status & (KN_ACTIVE | KN_QUEUED)) == KN_ACTIVE) {
kn->kn_status |= KN_ACTIVE;
kn->kn_status &= ~KN_ACTIVE;