443 	unsigned long blockpfn = *start_pfn;  in isolate_freepages_block()  local
446 	cursor = pfn_to_page(blockpfn);  in isolate_freepages_block()
449 	for (; blockpfn < end_pfn; blockpfn++, cursor++) {  in isolate_freepages_block()
458 		if (!(blockpfn % SWAP_CLUSTER_MAX)  in isolate_freepages_block()
464 		if (!pfn_valid_within(blockpfn))  in isolate_freepages_block()
480 				blockpfn += (1UL << order) - 1;  in isolate_freepages_block()
527 			blockpfn += isolated;  in isolate_freepages_block()
531 		blockpfn += isolated - 1;  in isolate_freepages_block()
550 	if (unlikely(blockpfn > end_pfn))  in isolate_freepages_block()
551 		blockpfn = end_pfn;  in isolate_freepages_block()
553 	trace_mm_compaction_isolate_freepages(*start_pfn, blockpfn,  in isolate_freepages_block()
557 	*start_pfn = blockpfn;  in isolate_freepages_block()
564 	if (strict && blockpfn < end_pfn)  in isolate_freepages_block()
568 	if (blockpfn == end_pfn)  in isolate_freepages_block()