664 isolate_migratepages_block(struct compact_control *cc, unsigned long low_pfn,  in isolate_migratepages_block()  argument
674 	unsigned long start_pfn = low_pfn;  in isolate_migratepages_block()
696 	for (; low_pfn < end_pfn; low_pfn++) {  in isolate_migratepages_block()
704 		if (!(low_pfn % SWAP_CLUSTER_MAX)  in isolate_migratepages_block()
709 		if (!pfn_valid_within(low_pfn))  in isolate_migratepages_block()
713 		page = pfn_to_page(low_pfn);  in isolate_migratepages_block()
733 				low_pfn += (1UL << freepage_order) - 1;  in isolate_migratepages_block()
763 				low_pfn += (1UL << comp_order) - 1;  in isolate_migratepages_block()
797 				low_pfn += (1UL << compound_order(page)) - 1;  in isolate_migratepages_block()
820 			++low_pfn;  in isolate_migratepages_block()
829 	if (unlikely(low_pfn > end_pfn))  in isolate_migratepages_block()
830 		low_pfn = end_pfn;  in isolate_migratepages_block()
839 	if (low_pfn == end_pfn)  in isolate_migratepages_block()
842 	trace_mm_compaction_isolate_migratepages(start_pfn, low_pfn,  in isolate_migratepages_block()
849 	return low_pfn;  in isolate_migratepages_block()
940 	unsigned long low_pfn;	     /* lowest pfn scanner is able to scan */  in isolate_freepages()  local
958 	low_pfn = ALIGN(cc->migrate_pfn + 1, pageblock_nr_pages);  in isolate_freepages()
965 	for (; block_start_pfn >= low_pfn;  in isolate_freepages()
1098 	unsigned long low_pfn, end_pfn;  in isolate_migratepages()  local
1109 	low_pfn = cc->migrate_pfn;  in isolate_migratepages()
1112 	end_pfn = ALIGN(low_pfn + 1, pageblock_nr_pages);  in isolate_migratepages()
1119 			low_pfn = end_pfn, end_pfn += pageblock_nr_pages) {  in isolate_migratepages()
1126 		if (!(low_pfn % (SWAP_CLUSTER_MAX * pageblock_nr_pages))  in isolate_migratepages()
1130 		page = pageblock_pfn_to_page(low_pfn, end_pfn, zone);  in isolate_migratepages()
1148 		isolate_start_pfn = low_pfn;  in isolate_migratepages()
1149 		low_pfn = isolate_migratepages_block(cc, low_pfn, end_pfn,  in isolate_migratepages()
1152 		if (!low_pfn || cc->contended) {  in isolate_migratepages()
1176 	cc->migrate_pfn = low_pfn;  in isolate_migratepages()