__hists__init
__hists__init(&hists->hists, &hists->list);
__hists__init(&bh->block_hists, &bh->block_list);
__hists__init(&kvm_hists.hists, &kvm_hists.list);
__hists__init(&bh->block_hists, &bh->block_list);
__hists__init(hists, &perf_hpp_list);
int __hists__init(struct hists *hists, struct perf_hpp_list *hpp_list);