48 #define block_start_pfn(pfn, order)	round_down(pfn, 1UL << (order))  macro
50 #define pageblock_start_pfn(pfn)	block_start_pfn(pfn, pageblock_order)
703 	unsigned long isolated, pfn, block_start_pfn, block_end_pfn;  in isolate_freepages_range()  local
707 	block_start_pfn = pageblock_start_pfn(pfn);  in isolate_freepages_range()
708 	if (block_start_pfn < cc->zone->zone_start_pfn)  in isolate_freepages_range()
709 		block_start_pfn = cc->zone->zone_start_pfn;  in isolate_freepages_range()
713 				block_start_pfn = block_end_pfn,  in isolate_freepages_range()
726 			block_start_pfn = pageblock_start_pfn(pfn);  in isolate_freepages_range()
731 		if (!pageblock_pfn_to_page(block_start_pfn,  in isolate_freepages_range()
1139 	unsigned long pfn, block_start_pfn, block_end_pfn;  in isolate_migratepages_range()  local
1143 	block_start_pfn = pageblock_start_pfn(pfn);  in isolate_migratepages_range()
1144 	if (block_start_pfn < cc->zone->zone_start_pfn)  in isolate_migratepages_range()
1145 		block_start_pfn = cc->zone->zone_start_pfn;  in isolate_migratepages_range()
1149 				block_start_pfn = block_end_pfn,  in isolate_migratepages_range()
1154 		if (!pageblock_pfn_to_page(block_start_pfn,  in isolate_migratepages_range()
1496 	unsigned long block_start_pfn;	/* start of current pageblock */  in isolate_freepages()  local
1520 	block_start_pfn = pageblock_start_pfn(isolate_start_pfn);  in isolate_freepages()
1521 	block_end_pfn = min(block_start_pfn + pageblock_nr_pages,  in isolate_freepages()
1531 	for (; block_start_pfn >= low_pfn;  in isolate_freepages()
1532 				block_end_pfn = block_start_pfn,  in isolate_freepages()
1533 				block_start_pfn -= pageblock_nr_pages,  in isolate_freepages()
1534 				isolate_start_pfn = block_start_pfn) {  in isolate_freepages()
1541 		if (!(block_start_pfn % (SWAP_CLUSTER_MAX * pageblock_nr_pages)))  in isolate_freepages()
1544 		page = pageblock_pfn_to_page(block_start_pfn, block_end_pfn,  in isolate_freepages()
1563 			update_pageblock_skip(cc, page, block_start_pfn);  in isolate_freepages()
1573 					block_start_pfn - pageblock_nr_pages;  in isolate_freepages()
1806 	unsigned long block_start_pfn;  in isolate_migratepages()  local
1821 	block_start_pfn = pageblock_start_pfn(low_pfn);  in isolate_migratepages()
1822 	if (block_start_pfn < cc->zone->zone_start_pfn)  in isolate_migratepages()
1823 		block_start_pfn = cc->zone->zone_start_pfn;  in isolate_migratepages()
1842 			block_start_pfn = block_end_pfn,  in isolate_migratepages()
1853 		page = pageblock_pfn_to_page(block_start_pfn,  in isolate_migratepages()
2400 				block_start_pfn(cc->migrate_pfn, cc->order);  in compact_zone()