412 static unsigned long find_smallest_section_pfn(int nid, struct zone *zone,  in find_smallest_section_pfn()  argument
423 		if (zone != page_zone(pfn_to_page(start_pfn)))  in find_smallest_section_pfn()
433 static unsigned long find_biggest_section_pfn(int nid, struct zone *zone,  in find_biggest_section_pfn()  argument
448 		if (zone != page_zone(pfn_to_page(pfn)))  in find_biggest_section_pfn()
457 static void shrink_zone_span(struct zone *zone, unsigned long start_pfn,  in shrink_zone_span()  argument
461 	int nid = zone_to_nid(zone);  in shrink_zone_span()
463 	if (zone->zone_start_pfn == start_pfn) {  in shrink_zone_span()
470 		pfn = find_smallest_section_pfn(nid, zone, end_pfn,  in shrink_zone_span()
471 						zone_end_pfn(zone));  in shrink_zone_span()
473 			zone->spanned_pages = zone_end_pfn(zone) - pfn;  in shrink_zone_span()
474 			zone->zone_start_pfn = pfn;  in shrink_zone_span()
476 			zone->zone_start_pfn = 0;  in shrink_zone_span()
477 			zone->spanned_pages = 0;  in shrink_zone_span()
479 	} else if (zone_end_pfn(zone) == end_pfn) {  in shrink_zone_span()
486 		pfn = find_biggest_section_pfn(nid, zone, zone->zone_start_pfn,  in shrink_zone_span()
489 			zone->spanned_pages = pfn - zone->zone_start_pfn + 1;  in shrink_zone_span()
491 			zone->zone_start_pfn = 0;  in shrink_zone_span()
492 			zone->spanned_pages = 0;  in shrink_zone_span()
500 	struct zone *zone;  in update_pgdat_span()  local
502 	for (zone = pgdat->node_zones;  in update_pgdat_span()
503 	     zone < pgdat->node_zones + MAX_NR_ZONES; zone++) {  in update_pgdat_span()
504 		unsigned long end_pfn = zone_end_pfn(zone);  in update_pgdat_span()
507 		if (!zone->spanned_pages)  in update_pgdat_span()
510 			node_start_pfn = zone->zone_start_pfn;  in update_pgdat_span()
517 		if (zone->zone_start_pfn < node_start_pfn)  in update_pgdat_span()
518 			node_start_pfn = zone->zone_start_pfn;  in update_pgdat_span()
525 void __ref remove_pfn_range_from_zone(struct zone *zone,  in remove_pfn_range_from_zone()  argument
530 	struct pglist_data *pgdat = zone->zone_pgdat;  in remove_pfn_range_from_zone()
549 	if (zone_is_zone_device(zone))  in remove_pfn_range_from_zone()
552 	clear_zone_contiguous(zone);  in remove_pfn_range_from_zone()
554 	shrink_zone_span(zone, start_pfn, start_pfn + nr_pages);  in remove_pfn_range_from_zone()
557 	set_zone_contiguous(zone);  in remove_pfn_range_from_zone()
680 	struct zone *zone, struct memory_notify *arg)  in node_states_check_changes_online()  argument
682 	int nid = zone_to_nid(zone);  in node_states_check_changes_online()
689 	if (zone_idx(zone) <= ZONE_NORMAL && !node_state(nid, N_NORMAL_MEMORY))  in node_states_check_changes_online()
702 static void __meminit resize_zone_range(struct zone *zone, unsigned long start_pfn,  in resize_zone_range()  argument
705 	unsigned long old_end_pfn = zone_end_pfn(zone);  in resize_zone_range()
707 	if (zone_is_empty(zone) || start_pfn < zone->zone_start_pfn)  in resize_zone_range()
708 		zone->zone_start_pfn = start_pfn;  in resize_zone_range()
710 	zone->spanned_pages = max(start_pfn + nr_pages, old_end_pfn) - zone->zone_start_pfn;  in resize_zone_range()
747 void __ref move_pfn_range_to_zone(struct zone *zone, unsigned long start_pfn,  in move_pfn_range_to_zone()  argument
751 	struct pglist_data *pgdat = zone->zone_pgdat;  in move_pfn_range_to_zone()
754 	clear_zone_contiguous(zone);  in move_pfn_range_to_zone()
756 	if (zone_is_empty(zone))  in move_pfn_range_to_zone()
757 		init_currently_empty_zone(zone, start_pfn, nr_pages);  in move_pfn_range_to_zone()
758 	resize_zone_range(zone, start_pfn, nr_pages);  in move_pfn_range_to_zone()
767 	if (zone_is_zone_device(zone)) {  in move_pfn_range_to_zone()
780 	memmap_init_range(nr_pages, nid, zone_idx(zone), start_pfn, 0,  in move_pfn_range_to_zone()
783 	set_zone_contiguous(zone);  in move_pfn_range_to_zone()
792 					    struct zone *zone)  in auto_movable_stats_account_zone()  argument
794 	if (zone_idx(zone) == ZONE_MOVABLE) {  in auto_movable_stats_account_zone()
795 		stats->movable_pages += zone->present_pages;  in auto_movable_stats_account_zone()
797 		stats->kernel_early_pages += zone->present_early_pages;  in auto_movable_stats_account_zone()
803 		stats->movable_pages += zone->cma_pages;  in auto_movable_stats_account_zone()
804 		stats->kernel_early_pages -= zone->cma_pages;  in auto_movable_stats_account_zone()
847 	struct zone *zone;  in auto_movable_can_online_movable()  local
853 		for_each_populated_zone(zone)  in auto_movable_can_online_movable()
854 			auto_movable_stats_account_zone(&stats, zone);  in auto_movable_can_online_movable()
857 			zone = pgdat->node_zones + i;  in auto_movable_can_online_movable()
858 			if (populated_zone(zone))  in auto_movable_can_online_movable()
859 				auto_movable_stats_account_zone(&stats, zone);  in auto_movable_can_online_movable()
894 static struct zone *default_kernel_zone_for_pfn(int nid, unsigned long start_pfn,  in default_kernel_zone_for_pfn()
901 		struct zone *zone = &pgdat->node_zones[zid];  in default_kernel_zone_for_pfn()  local
903 		if (zone_intersects(zone, start_pfn, nr_pages))  in default_kernel_zone_for_pfn()
904 			return zone;  in default_kernel_zone_for_pfn()
960 static struct zone *auto_movable_zone_for_pfn(int nid,  in auto_movable_zone_for_pfn()
1021 static inline struct zone *default_zone_for_pfn(int nid, unsigned long start_pfn,  in default_zone_for_pfn()
1024 	struct zone *kernel_zone = default_kernel_zone_for_pfn(nid, start_pfn,  in default_zone_for_pfn()
1026 	struct zone *movable_zone = &NODE_DATA(nid)->node_zones[ZONE_MOVABLE];  in default_zone_for_pfn()
1045 struct zone *zone_for_pfn_range(int online_type, int nid,  in zone_for_pfn_range()
1068 	struct zone *zone = page_zone(page);  in adjust_present_page_count()  local
1069 	const bool movable = zone_idx(zone) == ZONE_MOVABLE;  in adjust_present_page_count()
1076 		zone->present_early_pages += nr_pages;  in adjust_present_page_count()
1077 	zone->present_pages += nr_pages;  in adjust_present_page_count()
1078 	zone->zone_pgdat->node_present_pages += nr_pages;  in adjust_present_page_count()
1087 			      struct zone *zone)  in mhp_init_memmap_on_memory()  argument
1096 	move_pfn_range_to_zone(zone, pfn, nr_pages, NULL, MIGRATE_UNMOVABLE);  in mhp_init_memmap_on_memory()
1133 		       struct zone *zone, struct memory_group *group)  in online_pages()  argument
1137 	const int nid = zone_to_nid(zone);  in online_pages()
1155 	move_pfn_range_to_zone(zone, pfn, nr_pages, NULL, MIGRATE_ISOLATE);  in online_pages()
1159 	node_states_check_changes_online(nr_pages, zone, &arg);  in online_pages()
1170 	spin_lock_irqsave(&zone->lock, flags);  in online_pages()
1171 	zone->nr_isolate_pageblock += nr_pages / pageblock_nr_pages;  in online_pages()
1172 	spin_unlock_irqrestore(&zone->lock, flags);  in online_pages()
1179 	if (!populated_zone(zone)) {  in online_pages()
1181 		setup_zone_pageset(zone);  in online_pages()
1200 	shuffle_zone(zone);  in online_pages()
1219 	remove_pfn_range_from_zone(zone, pfn, nr_pages);  in online_pages()
1811 		struct zone *zone, struct memory_notify *arg)  in node_states_check_changes_offline()  argument
1813 	struct pglist_data *pgdat = zone->zone_pgdat;  in node_states_check_changes_offline()
1830 	if (zone_idx(zone) <= ZONE_NORMAL && nr_pages >= present_pages)  in node_states_check_changes_offline()
1831 		arg->status_change_nid_normal = zone_to_nid(zone);  in node_states_check_changes_offline()
1845 		arg->status_change_nid = zone_to_nid(zone);  in node_states_check_changes_offline()
1867 			struct zone *zone, struct memory_group *group)  in offline_pages()  argument
1871 	const int node = zone_to_nid(zone);  in offline_pages()
1911 	if (WARN_ON_ONCE(page_zone(pfn_to_page(start_pfn)) != zone ||  in offline_pages()
1912 			 page_zone(pfn_to_page(end_pfn - 1)) != zone)) {  in offline_pages()
1922 	zone_pcp_disable(zone);  in offline_pages()
1937 	node_states_check_changes_offline(nr_pages, zone, &arg);  in offline_pages()
2001 	spin_lock_irqsave(&zone->lock, flags);  in offline_pages()
2002 	zone->nr_isolate_pageblock -= nr_pages / pageblock_nr_pages;  in offline_pages()
2003 	spin_unlock_irqrestore(&zone->lock, flags);  in offline_pages()
2006 	zone_pcp_enable(zone);  in offline_pages()
2015 	if (!populated_zone(zone)) {  in offline_pages()
2016 		zone_pcp_reset(zone);  in offline_pages()
2029 	remove_pfn_range_from_zone(zone, start_pfn, nr_pages);  in offline_pages()
2039 	zone_pcp_enable(zone);  in offline_pages()