564 	unsigned long blockpfn = *start_pfn;  in isolate_freepages_block()  local
571 	cursor = pfn_to_page(blockpfn);  in isolate_freepages_block()
574 	for (; blockpfn < end_pfn; blockpfn += stride, cursor += stride) {  in isolate_freepages_block()
583 		if (!(blockpfn % SWAP_CLUSTER_MAX)  in isolate_freepages_block()
589 		if (!pfn_valid_within(blockpfn))  in isolate_freepages_block()
602 				blockpfn += (1UL << order) - 1;  in isolate_freepages_block()
639 			blockpfn += isolated;  in isolate_freepages_block()
643 		blockpfn += isolated - 1;  in isolate_freepages_block()
662 	if (unlikely(blockpfn > end_pfn))  in isolate_freepages_block()
663 		blockpfn = end_pfn;  in isolate_freepages_block()
665 	trace_mm_compaction_isolate_freepages(*start_pfn, blockpfn,  in isolate_freepages_block()
669 	*start_pfn = blockpfn;  in isolate_freepages_block()
676 	if (strict && blockpfn < end_pfn)  in isolate_freepages_block()