linux-master/mm/hugetlb.c

3939 	struct hstate *target_hstate;
3944 	target_hstate = size_to_hstate(PAGE_SIZE << h->demote_order);
3980 	mutex_lock(&target_hstate->resize_lock);
3982 				i += pages_per_huge_page(target_hstate)) {
3985 		if (hstate_is_gigantic(target_hstate))
3987 							target_hstate->order);
3989 			prep_compound_page(subpage, target_hstate->order);
3991 		prep_new_hugetlb_folio(target_hstate, inner_folio, nid);
3994 	mutex_unlock(&target_hstate->resize_lock);
4003 	target_hstate->max_huge_pages +=
4004 		pages_per_huge_page(h) / pages_per_huge_page(target_hstate);