linux-master/mm/hugetlb.c

176 	long ret = delta;
179 		return ret;
187 			ret = -ENOMEM;
199 			ret = delta - spool->rsv_hpages;
202 			ret = 0;	/* reserves already accounted for */
209 	return ret;
221 	long ret = delta;
235 			ret = 0;
237 			ret = spool->rsv_hpages + delta - spool->min_hpages;
250 	return ret;
1917 	long ret;
1927 	ret = hugetlb_vmemmap_restore_folios(h, folio_list, &non_hvo_folios);
1928 	if (ret < 0) {
1934 	 * At this point, list should be empty, ret should be >= 0 and there
1937 	 * Without HVO enabled, ret will be 0 and there is no need to call
1941 	VM_WARN_ON(ret < 0);
1942 	if (!list_empty(&non_hvo_folios) && ret) {
2630 	int ret;
2644 	ret = -ENOMEM;
2686 	ret = 0;
2706 	return ret;
2803 	long ret;
2813 		ret = region_chg(resv, idx, idx + 1, &dummy_out_regions_needed);
2821 		ret = region_add(resv, idx, idx + 1, 1, NULL, NULL);
2823 		VM_BUG_ON(ret < 0);
2827 		ret = 0;
2831 			ret = region_add(resv, idx, idx + 1, 1, NULL, NULL);
2833 			VM_BUG_ON(ret < 0);
2836 			ret = region_del(resv, idx, idx + 1);
2842 			ret = region_del(resv, idx, idx + 1);
2844 			ret = region_add(resv, idx, idx + 1, 1, NULL, NULL);
2846 			VM_BUG_ON(ret < 0);
2854 		return ret;
2870 	if (ret > 0)
2872 	if (ret == 0)
2874 	return ret;
3014 	int ret = 0;
3032 		ret = isolated ? 0 : -EBUSY;
3078 	return ret;
3088 	return ret;
3095 	int ret = -EBUSY;
3120 		ret = 0;
3122 		ret = alloc_and_dissolve_hugetlb_folio(h, folio, list);
3124 	return ret;
3135 	int memcg_charge_ret, ret, idx;
3190 		ret = hugetlb_cgroup_charge_cgroup_rsvd(
3192 		if (ret)
3196 	ret = hugetlb_cgroup_charge_cgroup(idx, pages_per_huge_page(h), &h_cg);
3197 	if (ret)
3338 	int ret;
3345 		ret = page_ref_freeze(page, 1);
3346 		VM_BUG_ON(!ret);
3354 	int ret;
3359 	ret = folio_ref_freeze(folio, 1);
3360 	VM_BUG_ON(!ret);
4936 	int ret;
4941 	ret = proc_hugetlb_doulongvec_minmax(table, write, buffer, length, ppos,
4943 	if (ret)
4947 		ret = __nr_hugepages_store_common(obey_mempolicy, h,
4950 	return ret;
4975 	int ret;
4985 	ret = proc_hugetlb_doulongvec_minmax(table, write, buffer, length, ppos,
4987 	if (ret)
4996 	return ret;
5119 	int ret = -ENOMEM;
5158 	ret = 0;
5164 	return ret;
5377 	int ret = 0;
5406 			ret = -ENOMEM;
5490 					ret = PTR_ERR(new_folio);
5493 				ret = copy_user_large_folio(new_folio,
5497 				if (ret) {
5550 	return ret;
5931 	vm_fault_t ret = 0;
6057 		ret = vmf_error(PTR_ERR(new_folio));
6065 	ret = vmf_anon_prepare(vmf);
6066 	if (unlikely(ret))
6070 		ret = VM_FAULT_HWPOISON_LARGE | VM_FAULT_SET_HINDEX(hstate_index(h));
6116 	return ret;
6205 	vm_fault_t ret = VM_FAULT_SIGBUS;
6255 				ret = 0;
6264 			ret = vmf_anon_prepare(vmf);
6265 			if (unlikely(ret))
6284 				ret = vmf_error(PTR_ERR(folio));
6286 				ret = 0;
6308 				ret = VM_FAULT_SIGBUS;
6323 			ret = VM_FAULT_HWPOISON_LARGE |
6334 				ret = 0;
6350 			ret = VM_FAULT_OOM;
6358 	ret = 0;
6380 		ret = hugetlb_wp(folio, vmf);
6397 	return ret;
6437 	vm_fault_t ret;
6488 				ret = VM_FAULT_HWPOISON_LARGE |
6503 	ret = 0;
6525 			ret = VM_FAULT_HWPOISON_LARGE |
6540 			ret = VM_FAULT_OOM;
6594 			ret = hugetlb_wp(pagecache_folio, &vmf);
6627 	return ret;
6678 	int ret = -ENOMEM;
6704 		ret = -EFAULT;
6715 			ret = -EEXIST;
6721 			ret = -ENOMEM;
6725 		ret = copy_folio_from_user(folio, (const void __user *) src_addr,
6729 		if (unlikely(ret)) {
6730 			ret = -ENOENT;
6742 				ret = -ENOMEM;
6756 			ret = -EEXIST;
6764 			ret = -ENOMEM;
6768 		ret = copy_user_large_folio(folio, *foliop, dst_addr, dst_vma);
6771 		if (ret) {
6796 		ret = -EFAULT;
6806 		ret = hugetlb_add_to_page_cache(folio, mapping, idx);
6807 		if (ret)
6814 	ret = -EIO;
6823 	ret = -EEXIST;
6866 	ret = 0;
6868 	return ret;
7528 	bool ret = true;
7534 		ret = false;
7541 	return ret;
7546 	int ret = 0;
7553 			ret = 0;
7555 			ret = folio_try_get(folio);
7557 			ret = -EBUSY;
7560 	return ret;
7566 	int ret;
7569 	ret = __get_huge_page_for_hwpoison(pfn, flags, migratable_cleared);
7571 	return ret;