DDI_IRM_FLAG_WAITERS
pool_p->ipool_flags |= DDI_IRM_FLAG_WAITERS;
!(pool_p->ipool_flags & DDI_IRM_FLAG_WAITERS) &&
if (pool_p->ipool_flags & DDI_IRM_FLAG_WAITERS) {
pool_p->ipool_flags &= ~(DDI_IRM_FLAG_WAITERS);