50 #define block_start_pfn(pfn, order)	round_down(pfn, 1UL << (order))  macro
52 #define pageblock_start_pfn(pfn)	block_start_pfn(pfn, pageblock_order)
700 	unsigned long isolated, pfn, block_start_pfn, block_end_pfn;  in isolate_freepages_range()  local
704 	block_start_pfn = pageblock_start_pfn(pfn);  in isolate_freepages_range()
705 	if (block_start_pfn < cc->zone->zone_start_pfn)  in isolate_freepages_range()
706 		block_start_pfn = cc->zone->zone_start_pfn;  in isolate_freepages_range()
710 				block_start_pfn = block_end_pfn,  in isolate_freepages_range()
723 			block_start_pfn = pageblock_start_pfn(pfn);  in isolate_freepages_range()
728 		if (!pageblock_pfn_to_page(block_start_pfn,  in isolate_freepages_range()
1252 	unsigned long pfn, block_start_pfn, block_end_pfn;  in isolate_migratepages_range()  local
1257 	block_start_pfn = pageblock_start_pfn(pfn);  in isolate_migratepages_range()
1258 	if (block_start_pfn < cc->zone->zone_start_pfn)  in isolate_migratepages_range()
1259 		block_start_pfn = cc->zone->zone_start_pfn;  in isolate_migratepages_range()
1263 				block_start_pfn = block_end_pfn,  in isolate_migratepages_range()
1268 		if (!pageblock_pfn_to_page(block_start_pfn,  in isolate_migratepages_range()
1606 	unsigned long block_start_pfn;	/* start of current pageblock */  in isolate_freepages()  local
1631 	block_start_pfn = pageblock_start_pfn(isolate_start_pfn);  in isolate_freepages()
1632 	block_end_pfn = min(block_start_pfn + pageblock_nr_pages,  in isolate_freepages()
1642 	for (; block_start_pfn >= low_pfn;  in isolate_freepages()
1643 				block_end_pfn = block_start_pfn,  in isolate_freepages()
1644 				block_start_pfn -= pageblock_nr_pages,  in isolate_freepages()
1645 				isolate_start_pfn = block_start_pfn) {  in isolate_freepages()
1652 		if (!(block_start_pfn % (SWAP_CLUSTER_MAX * pageblock_nr_pages)))  in isolate_freepages()
1655 		page = pageblock_pfn_to_page(block_start_pfn, block_end_pfn,  in isolate_freepages()
1678 			update_pageblock_skip(cc, page, block_start_pfn);  in isolate_freepages()
1688 					block_start_pfn - pageblock_nr_pages;  in isolate_freepages()
1924 	unsigned long block_start_pfn;  in isolate_migratepages()  local
1939 	block_start_pfn = pageblock_start_pfn(low_pfn);  in isolate_migratepages()
1940 	if (block_start_pfn < cc->zone->zone_start_pfn)  in isolate_migratepages()
1941 		block_start_pfn = cc->zone->zone_start_pfn;  in isolate_migratepages()
1960 			block_start_pfn = block_end_pfn,  in isolate_migratepages()
1971 		page = pageblock_pfn_to_page(block_start_pfn,  in isolate_migratepages()
2520 				block_start_pfn(cc->migrate_pfn, cc->order);  in compact_zone()