hammer2_thr_unfreeze
void hammer2_thr_unfreeze(hammer2_thread_t *thr);
hammer2_thr_unfreeze(&hmp->bfthr);
hammer2_thr_unfreeze(&pmp->sync_thrs[i]);
hammer2_thr_unfreeze(
void hammer2_thr_unfreeze(hammer2_thread_t *thr);
hammer2_thr_unfreeze(&hmp->bfthr);