53 #define block_start_pfn(pfn, order)	round_down(pfn, 1UL << (order))  macro
725 	unsigned long isolated, pfn, block_start_pfn, block_end_pfn;  in isolate_freepages_range()  local
729 	block_start_pfn = pageblock_start_pfn(pfn);  in isolate_freepages_range()
730 	if (block_start_pfn < cc->zone->zone_start_pfn)  in isolate_freepages_range()
731 		block_start_pfn = cc->zone->zone_start_pfn;  in isolate_freepages_range()
735 				block_start_pfn = block_end_pfn,  in isolate_freepages_range()
746 			block_start_pfn = pageblock_start_pfn(pfn);  in isolate_freepages_range()
752 		if (!pageblock_pfn_to_page(block_start_pfn,  in isolate_freepages_range()
1289 	unsigned long pfn, block_start_pfn, block_end_pfn;  in isolate_migratepages_range()  local
1294 	block_start_pfn = pageblock_start_pfn(pfn);  in isolate_migratepages_range()
1295 	if (block_start_pfn < cc->zone->zone_start_pfn)  in isolate_migratepages_range()
1296 		block_start_pfn = cc->zone->zone_start_pfn;  in isolate_migratepages_range()
1300 				block_start_pfn = block_end_pfn,  in isolate_migratepages_range()
1305 		if (!pageblock_pfn_to_page(block_start_pfn,  in isolate_migratepages_range()
1642 	unsigned long block_start_pfn;	/* start of current pageblock */  in isolate_freepages()  local
1666 	block_start_pfn = pageblock_start_pfn(isolate_start_pfn);  in isolate_freepages()
1667 	block_end_pfn = min(block_start_pfn + pageblock_nr_pages,  in isolate_freepages()
1677 	for (; block_start_pfn >= low_pfn;  in isolate_freepages()
1678 				block_end_pfn = block_start_pfn,  in isolate_freepages()
1679 				block_start_pfn -= pageblock_nr_pages,  in isolate_freepages()
1680 				isolate_start_pfn = block_start_pfn) {  in isolate_freepages()
1687 		if (!(block_start_pfn % (COMPACT_CLUSTER_MAX * pageblock_nr_pages)))  in isolate_freepages()
1690 		page = pageblock_pfn_to_page(block_start_pfn, block_end_pfn,  in isolate_freepages()
1695 			next_pfn = skip_offline_sections_reverse(block_start_pfn);  in isolate_freepages()
1697 				block_start_pfn = max(next_pfn, low_pfn);  in isolate_freepages()
1716 			update_pageblock_skip(cc, page, block_start_pfn -  in isolate_freepages()
1727 					block_start_pfn - pageblock_nr_pages;  in isolate_freepages()
1969 	unsigned long block_start_pfn;  in isolate_migratepages()  local
1984 	block_start_pfn = pageblock_start_pfn(low_pfn);  in isolate_migratepages()
1985 	if (block_start_pfn < cc->zone->zone_start_pfn)  in isolate_migratepages()
1986 		block_start_pfn = cc->zone->zone_start_pfn;  in isolate_migratepages()
2005 			block_start_pfn = block_end_pfn,  in isolate_migratepages()
2016 		page = pageblock_pfn_to_page(block_start_pfn,  in isolate_migratepages()
2021 			next_pfn = skip_offline_sections(block_start_pfn);  in isolate_migratepages()
2577 				block_start_pfn(cc->migrate_pfn, cc->order);  in compact_zone()