ipsq_enter
success = ipsq_enter(ill, B_FALSE, NEW_OP);
if (ipsq_enter(ill, B_FALSE, NEW_OP))
if (ipsq_enter(ill, B_TRUE, NEW_OP)) {
VERIFY(ipsq_enter(ill, B_FALSE, CUR_OP) == B_TRUE);
boolean_t ipsq_enter)
if (!ipsq_init(ill, ipsq_enter)) {
extern boolean_t ipsq_enter(ill_t *, boolean_t, int);