644 isolate_migratepages_block(struct compact_control *cc, unsigned long low_pfn,  in isolate_migratepages_block()  argument
654 	unsigned long start_pfn = low_pfn;  in isolate_migratepages_block()
676 	for (; low_pfn < end_pfn; low_pfn++) {  in isolate_migratepages_block()
682 		if (!(low_pfn % SWAP_CLUSTER_MAX)  in isolate_migratepages_block()
687 		if (!pfn_valid_within(low_pfn))  in isolate_migratepages_block()
691 		page = pfn_to_page(low_pfn);  in isolate_migratepages_block()
711 				low_pfn += (1UL << freepage_order) - 1;  in isolate_migratepages_block()
742 				low_pfn = ALIGN(low_pfn + 1,  in isolate_migratepages_block()
745 				low_pfn += (1 << compound_order(page)) - 1;  in isolate_migratepages_block()
770 				low_pfn += (1 << compound_order(page)) - 1;  in isolate_migratepages_block()
793 			++low_pfn;  in isolate_migratepages_block()
802 	if (unlikely(low_pfn > end_pfn))  in isolate_migratepages_block()
803 		low_pfn = end_pfn;  in isolate_migratepages_block()
812 	if (low_pfn == end_pfn)  in isolate_migratepages_block()
815 	trace_mm_compaction_isolate_migratepages(start_pfn, low_pfn,  in isolate_migratepages_block()
822 	return low_pfn;  in isolate_migratepages_block()
903 	unsigned long low_pfn;	     /* lowest pfn scanner is able to scan */  in isolate_freepages()  local
921 	low_pfn = ALIGN(cc->migrate_pfn + 1, pageblock_nr_pages);  in isolate_freepages()
928 	for (; block_start_pfn >= low_pfn &&  in isolate_freepages()
988 	if (block_start_pfn < low_pfn)  in isolate_freepages()
1056 	unsigned long low_pfn, end_pfn;  in isolate_migratepages()  local
1066 	low_pfn = cc->migrate_pfn;  in isolate_migratepages()
1069 	end_pfn = ALIGN(low_pfn + 1, pageblock_nr_pages);  in isolate_migratepages()
1076 			low_pfn = end_pfn, end_pfn += pageblock_nr_pages) {  in isolate_migratepages()
1083 		if (!(low_pfn % (SWAP_CLUSTER_MAX * pageblock_nr_pages))  in isolate_migratepages()
1087 		page = pageblock_pfn_to_page(low_pfn, end_pfn, zone);  in isolate_migratepages()
1105 		low_pfn = isolate_migratepages_block(cc, low_pfn, end_pfn,  in isolate_migratepages()
1108 		if (!low_pfn || cc->contended) {  in isolate_migratepages()
1127 	cc->migrate_pfn = (end_pfn <= cc->free_pfn) ? low_pfn : cc->free_pfn;  in isolate_migratepages()