683 	int err = 0;  in unmerge_ksm_pages()  local
685 	for (addr = start; addr < end && !err; addr += PAGE_SIZE) {  in unmerge_ksm_pages()
689 			err = -ERESTARTSYS;  in unmerge_ksm_pages()
691 			err = break_ksm(vma, addr);  in unmerge_ksm_pages()
693 	return err;  in unmerge_ksm_pages()
703 	int err;  in remove_stable_node()  local
718 		err = -EBUSY;  in remove_stable_node()
730 		err = 0;  in remove_stable_node()
735 	return err;  in remove_stable_node()
742 	int err = 0;  in remove_all_stable_nodes()  local
749 				err = -EBUSY;  in remove_all_stable_nodes()
757 			err = -EBUSY;  in remove_all_stable_nodes()
760 	return err;  in remove_all_stable_nodes()
768 	int err = 0;  in unmerge_and_remove_all_rmap_items()  local
784 			err = unmerge_ksm_pages(vma,  in unmerge_and_remove_all_rmap_items()
786 			if (err)  in unmerge_and_remove_all_rmap_items()
818 	return err;  in unmerge_and_remove_all_rmap_items()
857 	int err = -EFAULT;  in write_protect_page()  local
904 	err = 0;  in write_protect_page()
911 	return err;  in write_protect_page()
931 	int err = -EFAULT;  in replace_page()  local
966 	err = 0;  in replace_page()
970 	return err;  in replace_page()
986 	int err = -EFAULT;  in try_to_merge_one_page()  local
1030 			err = 0;  in try_to_merge_one_page()
1032 			err = replace_page(vma, page, kpage, orig_pte);  in try_to_merge_one_page()
1035 	if ((vma->vm_flags & VM_LOCKED) && kpage && !err) {  in try_to_merge_one_page()
1048 	return err;  in try_to_merge_one_page()
1062 	int err = -EFAULT;  in try_to_merge_with_ksm_page()  local
1069 	err = try_to_merge_one_page(vma, page, kpage);  in try_to_merge_with_ksm_page()
1070 	if (err)  in try_to_merge_with_ksm_page()
1081 	return err;  in try_to_merge_with_ksm_page()
1099 	int err;  in try_to_merge_two_pages()  local
1101 	err = try_to_merge_with_ksm_page(rmap_item, page, NULL);  in try_to_merge_two_pages()
1102 	if (!err) {  in try_to_merge_two_pages()
1103 		err = try_to_merge_with_ksm_page(tree_rmap_item,  in try_to_merge_two_pages()
1109 		if (err)  in try_to_merge_two_pages()
1112 	return err ? NULL : page;  in try_to_merge_two_pages()
1417 	int err;  in cmp_and_merge_page()  local
1443 		err = try_to_merge_with_ksm_page(rmap_item, page, kpage);  in cmp_and_merge_page()
1444 		if (!err) {  in cmp_and_merge_page()
1741 	int err;  in ksm_madvise()  local
1759 			err = __ksm_enter(mm);  in ksm_madvise()
1760 			if (err)  in ksm_madvise()
1761 				return err;  in ksm_madvise()
1772 			err = unmerge_ksm_pages(vma, start, end);  in ksm_madvise()
1773 			if (err)  in ksm_madvise()
1774 				return err;  in ksm_madvise()
2094 	int err;  in sleep_millisecs_store()  local
2096 	err = kstrtoul(buf, 10, &msecs);  in sleep_millisecs_store()
2097 	if (err || msecs > UINT_MAX)  in sleep_millisecs_store()
2116 	int err;  in pages_to_scan_store()  local
2119 	err = kstrtoul(buf, 10, &nr_pages);  in pages_to_scan_store()
2120 	if (err || nr_pages > UINT_MAX)  in pages_to_scan_store()
2138 	int err;  in run_store()  local
2141 	err = kstrtoul(buf, 10, &flags);  in run_store()
2142 	if (err || flags > UINT_MAX)  in run_store()
2160 			err = unmerge_and_remove_all_rmap_items();  in run_store()
2162 			if (err) {  in run_store()
2164 				count = err;  in run_store()
2188 	int err;  in merge_across_nodes_store()  local
2191 	err = kstrtoul(buf, 10, &knob);  in merge_across_nodes_store()
2192 	if (err)  in merge_across_nodes_store()
2193 		return err;  in merge_across_nodes_store()
2201 			err = -EBUSY;  in merge_across_nodes_store()
2215 				err = -ENOMEM;  in merge_across_nodes_store()
2223 		if (!err) {  in merge_across_nodes_store()
2230 	return err ? err : count;  in merge_across_nodes_store()
2304 	int err;  in ksm_init()  local
2306 	err = ksm_slab_init();  in ksm_init()
2307 	if (err)  in ksm_init()
2313 		err = PTR_ERR(ksm_thread);  in ksm_init()
2318 	err = sysfs_create_group(mm_kobj, &ksm_attr_group);  in ksm_init()
2319 	if (err) {  in ksm_init()
2338 	return err;  in ksm_init()