#ifndef _LINUX_MMZONE_H
#define _LINUX_MMZONE_H

#ifndef __ASSEMBLY__
#ifndef __GENERATING_BOUNDS_H

#include <linux/spinlock.h>
#include <linux/list.h>
#include <linux/wait.h>
#include <linux/bitops.h>
#include <linux/cache.h>
#include <linux/threads.h>
#include <linux/numa.h>
#include <linux/init.h>
#include <linux/seqlock.h>
#include <linux/nodemask.h>
#include <linux/pageblock-flags.h>
#include <generated/bounds.h>
#include <linux/atomic.h>
#include <asm/page.h>

#ifndef CONFIG_FORCE_MAX_ZONEORDER
#define MAX_ORDER 11
#else
#define MAX_ORDER CONFIG_FORCE_MAX_ZONEORDER
#endif
#define MAX_ORDER_NR_PAGES (1 << (MAX_ORDER - 1))

#define PAGE_ALLOC_COSTLY_ORDER 3

enum {
	MIGRATE_UNMOVABLE,
	MIGRATE_RECLAIMABLE,
	MIGRATE_MOVABLE,
	MIGRATE_PCPTYPES,	
	MIGRATE_RESERVE = MIGRATE_PCPTYPES,
#ifdef CONFIG_CMA
	MIGRATE_CMA,
#endif
	MIGRATE_ISOLATE,	
	MIGRATE_TYPES
};

#ifdef CONFIG_CMA
#  define is_migrate_cma(migratetype) unlikely((migratetype) == MIGRATE_CMA)
#  define cma_wmark_pages(zone)	zone->min_cma_pages
#else
#  define is_migrate_cma(migratetype) false
#  define cma_wmark_pages(zone) 0
#endif

#define for_each_migratetype_order(order, type) \
	for (order = 0; order < MAX_ORDER; order++) \
		for (type = 0; type < MIGRATE_TYPES; type++)

extern int page_group_by_mobility_disabled;

static inline int get_pageblock_migratetype(struct page *page)
{
	return get_pageblock_flags_group(page, PB_migrate, PB_migrate_end);
}

struct free_area {
	struct list_head	free_list[MIGRATE_TYPES];
	unsigned long		nr_free;
};

struct pglist_data;

#if defined(CONFIG_SMP)
struct zone_padding {
	char x[0];
} ____cacheline_internodealigned_in_smp;
#define ZONE_PADDING(name)	struct zone_padding name;
#else
#define ZONE_PADDING(name)
#endif

enum zone_stat_item {
	
	NR_FREE_PAGES,
	NR_LRU_BASE,
	NR_INACTIVE_ANON = NR_LRU_BASE, 
	NR_ACTIVE_ANON,		
	NR_INACTIVE_FILE,	
	NR_ACTIVE_FILE,		
	NR_UNEVICTABLE,		
	NR_MLOCK,		
	NR_ANON_PAGES,	
	NR_FILE_MAPPED,	
	NR_FILE_PAGES,
	NR_FILE_DIRTY,
	NR_WRITEBACK,
	NR_SLAB_RECLAIMABLE,
	NR_SLAB_UNRECLAIMABLE,
	NR_PAGETABLE,		
	NR_KERNEL_STACK,
	
	NR_UNSTABLE_NFS,	
	NR_BOUNCE,
	NR_VMSCAN_WRITE,
	NR_VMSCAN_IMMEDIATE,	
	NR_WRITEBACK_TEMP,	
	NR_ISOLATED_ANON,	
	NR_ISOLATED_FILE,	
	NR_SHMEM,		
	NR_DIRTIED,		
	NR_WRITTEN,		
#ifdef CONFIG_NUMA
	NUMA_HIT,		
	NUMA_MISS,		
	NUMA_FOREIGN,		
	NUMA_INTERLEAVE_HIT,	
	NUMA_LOCAL,		
	NUMA_OTHER,		
#endif
	NR_ANON_TRANSPARENT_HUGEPAGES,
	NR_FREE_CMA_PAGES,
	NR_VM_ZONE_STAT_ITEMS };

#define LRU_BASE 0
#define LRU_ACTIVE 1
#define LRU_FILE 2

enum lru_list {
	LRU_INACTIVE_ANON = LRU_BASE,
	LRU_ACTIVE_ANON = LRU_BASE + LRU_ACTIVE,
	LRU_INACTIVE_FILE = LRU_BASE + LRU_FILE,
	LRU_ACTIVE_FILE = LRU_BASE + LRU_FILE + LRU_ACTIVE,
	LRU_UNEVICTABLE,
	NR_LRU_LISTS
};

#define for_each_lru(lru) for (lru = 0; lru < NR_LRU_LISTS; lru++)

#define for_each_evictable_lru(lru) for (lru = 0; lru <= LRU_ACTIVE_FILE; lru++)

static inline int is_file_lru(enum lru_list lru)
{
	return (lru == LRU_INACTIVE_FILE || lru == LRU_ACTIVE_FILE);
}

static inline int is_active_lru(enum lru_list lru)
{
	return (lru == LRU_ACTIVE_ANON || lru == LRU_ACTIVE_FILE);
}

static inline int is_unevictable_lru(enum lru_list lru)
{
	return (lru == LRU_UNEVICTABLE);
}

struct lruvec {
	struct list_head lists[NR_LRU_LISTS];
};

#define LRU_ALL_FILE (BIT(LRU_INACTIVE_FILE) | BIT(LRU_ACTIVE_FILE))
#define LRU_ALL_ANON (BIT(LRU_INACTIVE_ANON) | BIT(LRU_ACTIVE_ANON))
#define LRU_ALL_EVICTABLE (LRU_ALL_FILE | LRU_ALL_ANON)
#define LRU_ALL	     ((1 << NR_LRU_LISTS) - 1)

/* Isolate clean file */
#define ISOLATE_CLEAN		((__force isolate_mode_t)0x1)
/* Isolate unmapped file */
#define ISOLATE_UNMAPPED	((__force isolate_mode_t)0x2)
/* Isolate for asynchronous migration */
#define ISOLATE_ASYNC_MIGRATE	((__force isolate_mode_t)0x4)
/* Isolate unevictable pages */
#define ISOLATE_UNEVICTABLE	((__force isolate_mode_t)0x8)

typedef unsigned __bitwise__ isolate_mode_t;

enum zone_watermarks {
	WMARK_MIN,
	WMARK_LOW,
	WMARK_HIGH,
	NR_WMARK
};

#define min_wmark_pages(z) (z->watermark[WMARK_MIN])
#define low_wmark_pages(z) (z->watermark[WMARK_LOW])
#define high_wmark_pages(z) (z->watermark[WMARK_HIGH])

struct per_cpu_pages {
	int count;		
	int high;		
	int batch;		

	
	struct list_head lists[MIGRATE_PCPTYPES];
};

struct per_cpu_pageset {
	struct per_cpu_pages pcp;
#ifdef CONFIG_NUMA
	s8 expire;
#endif
#ifdef CONFIG_SMP
	s8 stat_threshold;
	s8 vm_stat_diff[NR_VM_ZONE_STAT_ITEMS];
#endif
};

#endif 

enum zone_type {
#ifdef CONFIG_ZONE_DMA
	ZONE_DMA,
#endif
#ifdef CONFIG_ZONE_DMA32
	ZONE_DMA32,
#endif
	ZONE_NORMAL,
#ifdef CONFIG_HIGHMEM
	ZONE_HIGHMEM,
#endif
	ZONE_MOVABLE,
	__MAX_NR_ZONES
};

#ifndef __GENERATING_BOUNDS_H


#if MAX_NR_ZONES < 2
#define ZONES_SHIFT 0
#elif MAX_NR_ZONES <= 2
#define ZONES_SHIFT 1
#elif MAX_NR_ZONES <= 4
#define ZONES_SHIFT 2
#else
#error ZONES_SHIFT -- too many zones configured adjust calculation
#endif

struct zone_reclaim_stat {
	unsigned long		recent_rotated[2];
	unsigned long		recent_scanned[2];
};

struct zone {
	

	
	unsigned long watermark[NR_WMARK];

	unsigned long percpu_drift_mark;

	unsigned long		lowmem_reserve[MAX_NR_ZONES];

	unsigned long		dirty_balance_reserve;

#ifdef CONFIG_NUMA
	int node;
	unsigned long		min_unmapped_pages;
	unsigned long		min_slab_pages;
#endif
	struct per_cpu_pageset __percpu *pageset;
	spinlock_t		lock;
	int                     all_unreclaimable; /* All pages pinned */
#if defined CONFIG_COMPACTION || defined CONFIG_CMA
	/* Set to true when the PG_migrate_skip bits should be cleared */
	bool			compact_blockskip_flush;

	/* pfns where compaction scanners should start */
	unsigned long		compact_cached_free_pfn;
	unsigned long		compact_cached_migrate_pfn;
#endif
#ifdef CONFIG_MEMORY_HOTPLUG
	
	seqlock_t		span_seqlock;
#endif
#ifdef CONFIG_CMA
	unsigned long		min_cma_pages;
	bool			cma_alloc;
#endif
	struct free_area	free_area[MAX_ORDER];

#ifndef CONFIG_SPARSEMEM
	unsigned long		*pageblock_flags;
#endif 

#ifdef CONFIG_COMPACTION
	unsigned int		compact_considered;
	unsigned int		compact_defer_shift;
	int			compact_order_failed;
#endif

	ZONE_PADDING(_pad1_)

	
	spinlock_t		lru_lock;
	struct lruvec		lruvec;

	struct zone_reclaim_stat reclaim_stat;

	unsigned long		pages_scanned;	   
	unsigned long		flags;		   

	
	atomic_long_t		vm_stat[NR_VM_ZONE_STAT_ITEMS];

	unsigned int inactive_ratio;


	ZONE_PADDING(_pad2_)
	

	wait_queue_head_t	* wait_table;
	unsigned long		wait_table_hash_nr_entries;
	unsigned long		wait_table_bits;

	struct pglist_data	*zone_pgdat;
	
	unsigned long		zone_start_pfn;

	/*
	 * zone_start_pfn, spanned_pages and present_pages are all
	 * protected by span_seqlock.  It is a seqlock because it has
	 * to be read outside of zone->lock, and it is done in the main
	 * allocator path.  But, it is written quite infrequently.
	 *
	 * The lock is declared along with zone->lock because it is
	 * frequently read in proximity to zone->lock.  It's good to
	 * give them a chance of being in the same cacheline.
	 */
	unsigned long		spanned_pages;	
	unsigned long		present_pages;	

	const char		*name;
} ____cacheline_internodealigned_in_smp;

typedef enum {
	ZONE_RECLAIM_LOCKED,		
	ZONE_OOM_LOCKED,		
	ZONE_CONGESTED,			
} zone_flags_t;

static inline void zone_set_flag(struct zone *zone, zone_flags_t flag)
{
	set_bit(flag, &zone->flags);
}

static inline int zone_test_and_set_flag(struct zone *zone, zone_flags_t flag)
{
	return test_and_set_bit(flag, &zone->flags);
}

static inline void zone_clear_flag(struct zone *zone, zone_flags_t flag)
{
	clear_bit(flag, &zone->flags);
}

static inline int zone_is_reclaim_congested(const struct zone *zone)
{
	return test_bit(ZONE_CONGESTED, &zone->flags);
}

static inline int zone_is_reclaim_locked(const struct zone *zone)
{
	return test_bit(ZONE_RECLAIM_LOCKED, &zone->flags);
}

static inline int zone_is_oom_locked(const struct zone *zone)
{
	return test_bit(ZONE_OOM_LOCKED, &zone->flags);
}

#ifdef CONFIG_SMP
unsigned long zone_nr_free_pages(struct zone *zone);
#else
#define zone_nr_free_pages(zone) zone_page_state(zone, NR_FREE_PAGES)
#endif 

#define DEF_PRIORITY 12

#define MAX_ZONES_PER_ZONELIST (MAX_NUMNODES * MAX_NR_ZONES)

#ifdef CONFIG_NUMA

#define MAX_ZONELISTS 2




struct zonelist_cache {
	unsigned short z_to_n[MAX_ZONES_PER_ZONELIST];		
	DECLARE_BITMAP(fullzones, MAX_ZONES_PER_ZONELIST);	
	unsigned long last_full_zap;		
};
#else
#define MAX_ZONELISTS 1
struct zonelist_cache;
#endif

struct zoneref {
	struct zone *zone;	
	int zone_idx;		
};

struct zonelist {
	struct zonelist_cache *zlcache_ptr;		     
	struct zoneref _zonerefs[MAX_ZONES_PER_ZONELIST + 1];
#ifdef CONFIG_NUMA
	struct zonelist_cache zlcache;			     
#endif
};

#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
struct node_active_region {
	unsigned long start_pfn;
	unsigned long end_pfn;
	int nid;
};
#endif 

#ifndef CONFIG_DISCONTIGMEM
extern struct page *mem_map;
#endif

struct bootmem_data;
typedef struct pglist_data {
	struct zone node_zones[MAX_NR_ZONES];
	struct zonelist node_zonelists[MAX_ZONELISTS];
	int nr_zones;
#ifdef CONFIG_FLAT_NODE_MEM_MAP	
	struct page *node_mem_map;
#ifdef CONFIG_CGROUP_MEM_RES_CTLR
	struct page_cgroup *node_page_cgroup;
#endif
#endif
#ifndef CONFIG_NO_BOOTMEM
	struct bootmem_data *bdata;
#endif
#ifdef CONFIG_MEMORY_HOTPLUG
	spinlock_t node_size_lock;
#endif
	unsigned long node_start_pfn;
	unsigned long node_present_pages; 
	unsigned long node_spanned_pages; 
	int node_id;
	wait_queue_head_t kswapd_wait;
	struct task_struct *kswapd;	
	int kswapd_max_order;
	enum zone_type classzone_idx;
} pg_data_t;

#define node_present_pages(nid)	(NODE_DATA(nid)->node_present_pages)
#define node_spanned_pages(nid)	(NODE_DATA(nid)->node_spanned_pages)
#ifdef CONFIG_FLAT_NODE_MEM_MAP
#define pgdat_page_nr(pgdat, pagenr)	((pgdat)->node_mem_map + (pagenr))
#else
#define pgdat_page_nr(pgdat, pagenr)	pfn_to_page((pgdat)->node_start_pfn + (pagenr))
#endif
#define nid_page_nr(nid, pagenr) 	pgdat_page_nr(NODE_DATA(nid),(pagenr))

#define node_start_pfn(nid)	(NODE_DATA(nid)->node_start_pfn)

#define node_end_pfn(nid) ({\
	pg_data_t *__pgdat = NODE_DATA(nid);\
	__pgdat->node_start_pfn + __pgdat->node_spanned_pages;\
})

#include <linux/memory_hotplug.h>

extern struct mutex zonelists_mutex;
void build_all_zonelists(void *data);
void wakeup_kswapd(struct zone *zone, int order, enum zone_type classzone_idx);
bool zone_watermark_ok(struct zone *z, int order, unsigned long mark,
		int classzone_idx, int alloc_flags);
bool zone_watermark_ok_safe(struct zone *z, int order, unsigned long mark,
		int classzone_idx, int alloc_flags);
enum memmap_context {
	MEMMAP_EARLY,
	MEMMAP_HOTPLUG,
};
extern int init_currently_empty_zone(struct zone *zone, unsigned long start_pfn,
				     unsigned long size,
				     enum memmap_context context);

#ifdef CONFIG_HAVE_MEMORY_PRESENT
void memory_present(int nid, unsigned long start, unsigned long end);
#else
static inline void memory_present(int nid, unsigned long start, unsigned long end) {}
#endif

#ifdef CONFIG_HAVE_MEMORYLESS_NODES
int local_memory_node(int node_id);
#else
static inline int local_memory_node(int node_id) { return node_id; };
#endif

#ifdef CONFIG_NEED_NODE_MEMMAP_SIZE
unsigned long __init node_memmap_size_bytes(int, unsigned long, unsigned long);
#endif

#define zone_idx(zone)		((zone) - (zone)->zone_pgdat->node_zones)

static inline int populated_zone(struct zone *zone)
{
	return (!!zone->present_pages);
}

extern int movable_zone;

static inline int zone_movable_is_highmem(void)
{
#if defined(CONFIG_HIGHMEM) && defined(CONFIG_HAVE_MEMBLOCK_NODE)
	return movable_zone == ZONE_HIGHMEM;
#else
	return 0;
#endif
}

static inline int is_highmem_idx(enum zone_type idx)
{
#ifdef CONFIG_HIGHMEM
	return (idx == ZONE_HIGHMEM ||
		(idx == ZONE_MOVABLE && zone_movable_is_highmem()));
#else
	return 0;
#endif
}

static inline int is_normal_idx(enum zone_type idx)
{
	return (idx == ZONE_NORMAL);
}

static inline int is_highmem(struct zone *zone)
{
#ifdef CONFIG_HIGHMEM
	int zone_off = (char *)zone - (char *)zone->zone_pgdat->node_zones;
	return zone_off == ZONE_HIGHMEM * sizeof(*zone) ||
	       (zone_off == ZONE_MOVABLE * sizeof(*zone) &&
		zone_movable_is_highmem());
#else
	return 0;
#endif
}

static inline int is_normal(struct zone *zone)
{
	return zone == zone->zone_pgdat->node_zones + ZONE_NORMAL;
}

static inline int is_dma32(struct zone *zone)
{
#ifdef CONFIG_ZONE_DMA32
	return zone == zone->zone_pgdat->node_zones + ZONE_DMA32;
#else
	return 0;
#endif
}

static inline int is_dma(struct zone *zone)
{
#ifdef CONFIG_ZONE_DMA
	return zone == zone->zone_pgdat->node_zones + ZONE_DMA;
#else
	return 0;
#endif
}

struct ctl_table;
int min_free_kbytes_sysctl_handler(struct ctl_table *, int,
					void __user *, size_t *, loff_t *);
extern int sysctl_lowmem_reserve_ratio[MAX_NR_ZONES-1];
int lowmem_reserve_ratio_sysctl_handler(struct ctl_table *, int,
					void __user *, size_t *, loff_t *);
int percpu_pagelist_fraction_sysctl_handler(struct ctl_table *, int,
					void __user *, size_t *, loff_t *);
int sysctl_min_unmapped_ratio_sysctl_handler(struct ctl_table *, int,
			void __user *, size_t *, loff_t *);
int sysctl_min_slab_ratio_sysctl_handler(struct ctl_table *, int,
			void __user *, size_t *, loff_t *);

extern int numa_zonelist_order_handler(struct ctl_table *, int,
			void __user *, size_t *, loff_t *);
extern char numa_zonelist_order[];
#define NUMA_ZONELIST_ORDER_LEN 16	

#ifndef CONFIG_NEED_MULTIPLE_NODES

extern struct pglist_data contig_page_data;
#define NODE_DATA(nid)		(&contig_page_data)
#define NODE_MEM_MAP(nid)	mem_map

#else 

#include <asm/mmzone.h>

#endif 

extern struct pglist_data *first_online_pgdat(void);
extern struct pglist_data *next_online_pgdat(struct pglist_data *pgdat);
extern struct zone *next_zone(struct zone *zone);

#define for_each_online_pgdat(pgdat)			\
	for (pgdat = first_online_pgdat();		\
	     pgdat;					\
	     pgdat = next_online_pgdat(pgdat))
#define for_each_zone(zone)			        \
	for (zone = (first_online_pgdat())->node_zones; \
	     zone;					\
	     zone = next_zone(zone))

#define for_each_populated_zone(zone)		        \
	for (zone = (first_online_pgdat())->node_zones; \
	     zone;					\
	     zone = next_zone(zone))			\
		if (!populated_zone(zone))		\
			; 		\
		else

static inline struct zone *zonelist_zone(struct zoneref *zoneref)
{
	return zoneref->zone;
}

static inline int zonelist_zone_idx(struct zoneref *zoneref)
{
	return zoneref->zone_idx;
}

static inline int zonelist_node_idx(struct zoneref *zoneref)
{
#ifdef CONFIG_NUMA
	
	return zoneref->zone->node;
#else
	return 0;
#endif 
}

struct zoneref *next_zones_zonelist(struct zoneref *z,
					enum zone_type highest_zoneidx,
					nodemask_t *nodes,
					struct zone **zone);

static inline struct zoneref *first_zones_zonelist(struct zonelist *zonelist,
					enum zone_type highest_zoneidx,
					nodemask_t *nodes,
					struct zone **zone)
{
	return next_zones_zonelist(zonelist->_zonerefs, highest_zoneidx, nodes,
								zone);
}

#define for_each_zone_zonelist_nodemask(zone, z, zlist, highidx, nodemask) \
	for (z = first_zones_zonelist(zlist, highidx, nodemask, &zone);	\
		zone;							\
		z = next_zones_zonelist(++z, highidx, nodemask, &zone))	\

#define for_each_zone_zonelist(zone, z, zlist, highidx) \
	for_each_zone_zonelist_nodemask(zone, z, zlist, highidx, NULL)

#ifdef CONFIG_SPARSEMEM
#include <asm/sparsemem.h>
#endif

#if !defined(CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID) && \
	!defined(CONFIG_HAVE_MEMBLOCK_NODE_MAP)
static inline unsigned long early_pfn_to_nid(unsigned long pfn)
{
	return 0;
}
#endif

#ifdef CONFIG_FLATMEM
#define pfn_to_nid(pfn)		(0)
#endif

#ifdef CONFIG_SPARSEMEM

#define SECTIONS_SHIFT		(MAX_PHYSMEM_BITS - SECTION_SIZE_BITS)

#define PA_SECTION_SHIFT	(SECTION_SIZE_BITS)
#define PFN_SECTION_SHIFT	(SECTION_SIZE_BITS - PAGE_SHIFT)

#define NR_MEM_SECTIONS		(1UL << SECTIONS_SHIFT)

#define PAGES_PER_SECTION       (1UL << PFN_SECTION_SHIFT)
#define PAGE_SECTION_MASK	(~(PAGES_PER_SECTION-1))

#define SECTION_BLOCKFLAGS_BITS \
	((1UL << (PFN_SECTION_SHIFT - pageblock_order)) * NR_PAGEBLOCK_BITS)

#if (MAX_ORDER - 1 + PAGE_SHIFT) > SECTION_SIZE_BITS
#error Allocator MAX_ORDER exceeds SECTION_SIZE
#endif

#define pfn_to_section_nr(pfn) ((pfn) >> PFN_SECTION_SHIFT)
#define section_nr_to_pfn(sec) ((sec) << PFN_SECTION_SHIFT)

#define SECTION_ALIGN_UP(pfn)	(((pfn) + PAGES_PER_SECTION - 1) & PAGE_SECTION_MASK)
#define SECTION_ALIGN_DOWN(pfn)	((pfn) & PAGE_SECTION_MASK)

struct page;
struct page_cgroup;
struct mem_section {
	unsigned long section_mem_map;

	
	unsigned long *pageblock_flags;
#ifdef CONFIG_CGROUP_MEM_RES_CTLR
	struct page_cgroup *page_cgroup;
	unsigned long pad;
#endif
};

#ifdef CONFIG_SPARSEMEM_EXTREME
#define SECTIONS_PER_ROOT       (PAGE_SIZE / sizeof (struct mem_section))
#else
#define SECTIONS_PER_ROOT	1
#endif

#define SECTION_NR_TO_ROOT(sec)	((sec) / SECTIONS_PER_ROOT)
#define NR_SECTION_ROOTS	DIV_ROUND_UP(NR_MEM_SECTIONS, SECTIONS_PER_ROOT)
#define SECTION_ROOT_MASK	(SECTIONS_PER_ROOT - 1)

#ifdef CONFIG_SPARSEMEM_EXTREME
extern struct mem_section *mem_section[NR_SECTION_ROOTS];
#else
extern struct mem_section mem_section[NR_SECTION_ROOTS][SECTIONS_PER_ROOT];
#endif

static inline struct mem_section *__nr_to_section(unsigned long nr)
{
	if (!mem_section[SECTION_NR_TO_ROOT(nr)])
		return NULL;
	return &mem_section[SECTION_NR_TO_ROOT(nr)][nr & SECTION_ROOT_MASK];
}
extern int __section_nr(struct mem_section* ms);
extern unsigned long usemap_size(void);

#define	SECTION_MARKED_PRESENT	(1UL<<0)
#define SECTION_HAS_MEM_MAP	(1UL<<1)
#define SECTION_MAP_LAST_BIT	(1UL<<2)
#define SECTION_MAP_MASK	(~(SECTION_MAP_LAST_BIT-1))
#define SECTION_NID_SHIFT	2

static inline struct page *__section_mem_map_addr(struct mem_section *section)
{
	unsigned long map = section->section_mem_map;
	map &= SECTION_MAP_MASK;
	return (struct page *)map;
}

static inline int present_section(struct mem_section *section)
{
	return (section && (section->section_mem_map & SECTION_MARKED_PRESENT));
}

static inline int present_section_nr(unsigned long nr)
{
	return present_section(__nr_to_section(nr));
}

static inline int valid_section(struct mem_section *section)
{
	return (section && (section->section_mem_map & SECTION_HAS_MEM_MAP));
}

static inline int valid_section_nr(unsigned long nr)
{
	return valid_section(__nr_to_section(nr));
}

static inline struct mem_section *__pfn_to_section(unsigned long pfn)
{
	return __nr_to_section(pfn_to_section_nr(pfn));
}

#ifndef CONFIG_HAVE_ARCH_PFN_VALID
static inline int pfn_valid(unsigned long pfn)
{
	if (pfn_to_section_nr(pfn) >= NR_MEM_SECTIONS)
		return 0;
	return valid_section(__nr_to_section(pfn_to_section_nr(pfn)));
}
#endif

static inline int pfn_present(unsigned long pfn)
{
	if (pfn_to_section_nr(pfn) >= NR_MEM_SECTIONS)
		return 0;
	return present_section(__nr_to_section(pfn_to_section_nr(pfn)));
}

#ifdef CONFIG_NUMA
#define pfn_to_nid(pfn)							\
({									\
	unsigned long __pfn_to_nid_pfn = (pfn);				\
	page_to_nid(pfn_to_page(__pfn_to_nid_pfn));			\
})
#else
#define pfn_to_nid(pfn)		(0)
#endif

#ifndef early_pfn_valid
#define early_pfn_valid(pfn)	pfn_valid(pfn)
#endif

void sparse_init(void);
#else
#define sparse_init()	do {} while (0)
#define sparse_index_init(_sec, _nid)  do {} while (0)
#endif 

#ifdef CONFIG_NODES_SPAN_OTHER_NODES
bool early_pfn_in_nid(unsigned long pfn, int nid);
#else
#define early_pfn_in_nid(pfn, nid)	(1)
#endif

#ifndef early_pfn_valid
#define early_pfn_valid(pfn)	(1)
#endif

void memory_present(int nid, unsigned long start, unsigned long end);
unsigned long __init node_memmap_size_bytes(int, unsigned long, unsigned long);

#ifdef CONFIG_HOLES_IN_ZONE
#define pfn_valid_within(pfn) pfn_valid(pfn)
#else
#define pfn_valid_within(pfn) (1)
#endif

#ifdef CONFIG_ARCH_HAS_HOLES_MEMORYMODEL
int memmap_valid_within(unsigned long pfn,
					struct page *page, struct zone *zone);
#else
static inline int memmap_valid_within(unsigned long pfn,
					struct page *page, struct zone *zone)
{
	return 1;
}
#endif 

#endif 
#endif 
#endif