329 static unsigned long find_smallest_section_pfn(int nid, struct zone *zone,  in find_smallest_section_pfn()  argument
340 		if (zone && zone != page_zone(pfn_to_page(start_pfn)))  in find_smallest_section_pfn()
350 static unsigned long find_biggest_section_pfn(int nid, struct zone *zone,  in find_biggest_section_pfn()  argument
365 		if (zone && zone != page_zone(pfn_to_page(pfn)))  in find_biggest_section_pfn()
374 static void shrink_zone_span(struct zone *zone, unsigned long start_pfn,  in shrink_zone_span()  argument
377 	unsigned long zone_start_pfn = zone->zone_start_pfn;  in shrink_zone_span()
378 	unsigned long z = zone_end_pfn(zone); /* zone_end_pfn namespace clash */  in shrink_zone_span()
381 	int nid = zone_to_nid(zone);  in shrink_zone_span()
383 	zone_span_writelock(zone);  in shrink_zone_span()
391 		pfn = find_smallest_section_pfn(nid, zone, end_pfn,  in shrink_zone_span()
394 			zone->zone_start_pfn = pfn;  in shrink_zone_span()
395 			zone->spanned_pages = zone_end_pfn - pfn;  in shrink_zone_span()
404 		pfn = find_biggest_section_pfn(nid, zone, zone_start_pfn,  in shrink_zone_span()
407 			zone->spanned_pages = pfn - zone_start_pfn + 1;  in shrink_zone_span()
421 		if (page_zone(pfn_to_page(pfn)) != zone)  in shrink_zone_span()
429 		zone_span_writeunlock(zone);  in shrink_zone_span()
434 	zone->zone_start_pfn = 0;  in shrink_zone_span()
435 	zone->spanned_pages = 0;  in shrink_zone_span()
436 	zone_span_writeunlock(zone);  in shrink_zone_span()
442 	struct zone *zone;  in update_pgdat_span()  local
444 	for (zone = pgdat->node_zones;  in update_pgdat_span()
445 	     zone < pgdat->node_zones + MAX_NR_ZONES; zone++) {  in update_pgdat_span()
446 		unsigned long zone_end_pfn = zone->zone_start_pfn +  in update_pgdat_span()
447 					     zone->spanned_pages;  in update_pgdat_span()
450 		if (!zone->spanned_pages)  in update_pgdat_span()
453 			node_start_pfn = zone->zone_start_pfn;  in update_pgdat_span()
460 		if (zone->zone_start_pfn < node_start_pfn)  in update_pgdat_span()
461 			node_start_pfn = zone->zone_start_pfn;  in update_pgdat_span()
468 void __ref remove_pfn_range_from_zone(struct zone *zone,  in remove_pfn_range_from_zone()  argument
472 	struct pglist_data *pgdat = zone->zone_pgdat;  in remove_pfn_range_from_zone()
481 	if (zone_idx(zone) == ZONE_DEVICE)  in remove_pfn_range_from_zone()
485 	clear_zone_contiguous(zone);  in remove_pfn_range_from_zone()
487 	pgdat_resize_lock(zone->zone_pgdat, &flags);  in remove_pfn_range_from_zone()
488 	shrink_zone_span(zone, start_pfn, start_pfn + nr_pages);  in remove_pfn_range_from_zone()
490 	pgdat_resize_unlock(zone->zone_pgdat, &flags);  in remove_pfn_range_from_zone()
492 	set_zone_contiguous(zone);  in remove_pfn_range_from_zone()
639 	struct zone *zone, struct memory_notify *arg)  in node_states_check_changes_online()  argument
641 	int nid = zone_to_nid(zone);  in node_states_check_changes_online()
649 	if (zone_idx(zone) <= ZONE_NORMAL && !node_state(nid, N_NORMAL_MEMORY))  in node_states_check_changes_online()
652 	if (zone_idx(zone) <= ZONE_HIGHMEM && !node_state(nid, N_HIGH_MEMORY))  in node_states_check_changes_online()
669 static void __meminit resize_zone_range(struct zone *zone, unsigned long start_pfn,  in resize_zone_range()  argument
672 	unsigned long old_end_pfn = zone_end_pfn(zone);  in resize_zone_range()
674 	if (zone_is_empty(zone) || start_pfn < zone->zone_start_pfn)  in resize_zone_range()
675 		zone->zone_start_pfn = start_pfn;  in resize_zone_range()
677 	zone->spanned_pages = max(start_pfn + nr_pages, old_end_pfn) - zone->zone_start_pfn;  in resize_zone_range()
696 void __ref move_pfn_range_to_zone(struct zone *zone, unsigned long start_pfn,  in move_pfn_range_to_zone()  argument
699 	struct pglist_data *pgdat = zone->zone_pgdat;  in move_pfn_range_to_zone()
703 	clear_zone_contiguous(zone);  in move_pfn_range_to_zone()
707 	zone_span_writelock(zone);  in move_pfn_range_to_zone()
708 	if (zone_is_empty(zone))  in move_pfn_range_to_zone()
709 		init_currently_empty_zone(zone, start_pfn, nr_pages);  in move_pfn_range_to_zone()
710 	resize_zone_range(zone, start_pfn, nr_pages);  in move_pfn_range_to_zone()
711 	zone_span_writeunlock(zone);  in move_pfn_range_to_zone()
721 	memmap_init_zone(nr_pages, nid, zone_idx(zone), start_pfn,  in move_pfn_range_to_zone()
724 	set_zone_contiguous(zone);  in move_pfn_range_to_zone()
732 static struct zone *default_kernel_zone_for_pfn(int nid, unsigned long start_pfn,  in default_kernel_zone_for_pfn()
739 		struct zone *zone = &pgdat->node_zones[zid];  in default_kernel_zone_for_pfn()  local
741 		if (zone_intersects(zone, start_pfn, nr_pages))  in default_kernel_zone_for_pfn()
742 			return zone;  in default_kernel_zone_for_pfn()
748 static inline struct zone *default_zone_for_pfn(int nid, unsigned long start_pfn,  in default_zone_for_pfn()
751 	struct zone *kernel_zone = default_kernel_zone_for_pfn(nid, start_pfn,  in default_zone_for_pfn()
753 	struct zone *movable_zone = &NODE_DATA(nid)->node_zones[ZONE_MOVABLE];  in default_zone_for_pfn()
772 struct zone * zone_for_pfn_range(int online_type, int nid, unsigned start_pfn,  in zone_for_pfn_range()
788 	struct zone *zone;  in online_pages()  local
806 	zone = zone_for_pfn_range(online_type, nid, pfn, nr_pages);  in online_pages()
807 	move_pfn_range_to_zone(zone, pfn, nr_pages, NULL);  in online_pages()
811 	node_states_check_changes_online(nr_pages, zone, &arg);  in online_pages()
823 	if (!populated_zone(zone)) {  in online_pages()
825 		setup_zone_pageset(zone);  in online_pages()
833 			zone_pcp_reset(zone);  in online_pages()
837 	zone->present_pages += onlined_pages;  in online_pages()
839 	pgdat_resize_lock(zone->zone_pgdat, &flags);  in online_pages()
840 	zone->zone_pgdat->node_present_pages += onlined_pages;  in online_pages()
841 	pgdat_resize_unlock(zone->zone_pgdat, &flags);  in online_pages()
843 	shuffle_zone(zone);  in online_pages()
849 		zone_pcp_update(zone);  in online_pages()
869 	remove_pfn_range_from_zone(zone, pfn, nr_pages);  in online_pages()
877 	struct zone *z;  in reset_node_present_pages()
1166 	struct zone *zone;  in is_pageblock_removable_nolock()  local
1178 	zone = page_zone(page);  in is_pageblock_removable_nolock()
1180 	if (!zone_spans_pfn(zone, pfn))  in is_pageblock_removable_nolock()
1183 	return !has_unmovable_pages(zone, page, 0, MIGRATE_MOVABLE, SKIP_HWPOISON);  in is_pageblock_removable_nolock()
1214 	struct zone *zone = NULL;  in test_pages_in_a_zone()  local
1233 			if (zone && !zone_spans_pfn(zone, pfn + i))  in test_pages_in_a_zone()
1236 			if (zone && page_zone(page) != zone)  in test_pages_in_a_zone()
1238 			if (!zone)  in test_pages_in_a_zone()
1240 			zone = page_zone(page);  in test_pages_in_a_zone()
1245 	if (zone) {  in test_pages_in_a_zone()
1416 		struct zone *zone, struct memory_notify *arg)  in node_states_check_changes_offline()  argument
1418 	struct pglist_data *pgdat = zone->zone_pgdat;  in node_states_check_changes_offline()
1436 	if (zone_idx(zone) <= ZONE_NORMAL && nr_pages >= present_pages)  in node_states_check_changes_offline()
1437 		arg->status_change_nid_normal = zone_to_nid(zone);  in node_states_check_changes_offline()
1449 	if (zone_idx(zone) <= ZONE_HIGHMEM && nr_pages >= present_pages)  in node_states_check_changes_offline()
1450 		arg->status_change_nid_high = zone_to_nid(zone);  in node_states_check_changes_offline()
1466 		arg->status_change_nid = zone_to_nid(zone);  in node_states_check_changes_offline()
1489 	struct zone *zone;  in __offline_pages()  local
1504 	zone = page_zone(pfn_to_page(valid_start));  in __offline_pages()
1505 	node = zone_to_nid(zone);  in __offline_pages()
1520 	node_states_check_changes_offline(nr_pages, zone, &arg);  in __offline_pages()
1575 	spin_lock_irqsave(&zone->lock, flags);  in __offline_pages()
1576 	zone->nr_isolate_pageblock -= nr_isolate_pageblock;  in __offline_pages()
1577 	spin_unlock_irqrestore(&zone->lock, flags);  in __offline_pages()
1581 	zone->present_pages -= offlined_pages;  in __offline_pages()
1583 	pgdat_resize_lock(zone->zone_pgdat, &flags);  in __offline_pages()
1584 	zone->zone_pgdat->node_present_pages -= offlined_pages;  in __offline_pages()
1585 	pgdat_resize_unlock(zone->zone_pgdat, &flags);  in __offline_pages()
1589 	if (!populated_zone(zone)) {  in __offline_pages()
1590 		zone_pcp_reset(zone);  in __offline_pages()
1593 		zone_pcp_update(zone);  in __offline_pages()
1605 	remove_pfn_range_from_zone(zone, start_pfn, nr_pages);  in __offline_pages()