[GitHub/mt8127/android_kernel_alcatel_ttab.git] / include / linux / hugetlb.h

#ifndef _LINUX_HUGETLB_H
#define _LINUX_HUGETLB_H

#include <linux/mm_types.h>
#include <linux/fs.h>
#include <linux/hugetlb_inline.h>

struct ctl_table;
struct user_struct;

#ifdef CONFIG_HUGETLB_PAGE

#include <linux/mempolicy.h>
#include <linux/shm.h>
#include <asm/tlbflush.h>

struct hugepage_subpool {
	spinlock_t lock;
	long count;
	long max_hpages, used_hpages;
};

struct hugepage_subpool *hugepage_new_subpool(long nr_blocks);
void hugepage_put_subpool(struct hugepage_subpool *spool);

int PageHuge(struct page *page);

void reset_vma_resv_huge_pages(struct vm_area_struct *vma);
int hugetlb_sysctl_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *);
int hugetlb_overcommit_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *);
int hugetlb_treat_movable_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *);

#ifdef CONFIG_NUMA
int hugetlb_mempolicy_sysctl_handler(struct ctl_table *, int,
					void __user *, size_t *, loff_t *);
#endif

int copy_hugetlb_page_range(struct mm_struct *, struct mm_struct *, struct vm_area_struct *);
int follow_hugetlb_page(struct mm_struct *, struct vm_area_struct *,
			struct page **, struct vm_area_struct **,
			unsigned long *, int *, int, unsigned int flags);
void unmap_hugepage_range(struct vm_area_struct *,
			unsigned long, unsigned long, struct page *);
void __unmap_hugepage_range(struct vm_area_struct *,
			unsigned long, unsigned long, struct page *);
int hugetlb_prefault(struct address_space *, struct vm_area_struct *);
void hugetlb_report_meminfo(struct seq_file *);
int hugetlb_report_node_meminfo(int, char *);
unsigned long hugetlb_total_pages(void);
int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma,
			unsigned long address, unsigned int flags);
int hugetlb_reserve_pages(struct inode *inode, long from, long to,
						struct vm_area_struct *vma,
						vm_flags_t vm_flags);
void hugetlb_unreserve_pages(struct inode *inode, long offset, long freed);
int dequeue_hwpoisoned_huge_page(struct page *page);
void copy_huge_page(struct page *dst, struct page *src);

extern unsigned long hugepages_treat_as_movable;
extern const unsigned long hugetlb_zero, hugetlb_infinity;
extern int sysctl_hugetlb_shm_group;
extern struct list_head huge_boot_pages;

/* arch callbacks */

pte_t *huge_pte_alloc(struct mm_struct *mm,
			unsigned long addr, unsigned long sz);
pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr);
int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep);
struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address,
			      int write);
struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address,
				pmd_t *pmd, int write);
struct page *follow_huge_pud(struct mm_struct *mm, unsigned long address,
				pud_t *pud, int write);
int pmd_huge(pmd_t pmd);
int pud_huge(pud_t pmd);
void hugetlb_change_protection(struct vm_area_struct *vma,
		unsigned long address, unsigned long end, pgprot_t newprot);

#else /* !CONFIG_HUGETLB_PAGE */

static inline int PageHuge(struct page *page)
{
	return 0;
}

static inline void reset_vma_resv_huge_pages(struct vm_area_struct *vma)
{
}

static inline unsigned long hugetlb_total_pages(void)
{
	return 0;
}

#define follow_hugetlb_page(m,v,p,vs,a,b,i,w)	({ BUG(); 0; })
#define follow_huge_addr(mm, addr, write)	ERR_PTR(-EINVAL)
#define copy_hugetlb_page_range(src, dst, vma)	({ BUG(); 0; })
#define hugetlb_prefault(mapping, vma)		({ BUG(); 0; })
#define unmap_hugepage_range(vma, start, end, page)	BUG()
static inline void hugetlb_report_meminfo(struct seq_file *m)
{
}
#define hugetlb_report_node_meminfo(n, buf)	0
#define follow_huge_pmd(mm, addr, pmd, write)	NULL
#define follow_huge_pud(mm, addr, pud, write)	NULL
#define prepare_hugepage_range(file, addr, len)	(-EINVAL)
#define pmd_huge(x)	0
#define pud_huge(x)	0
#define is_hugepage_only_range(mm, addr, len)	0
#define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) ({BUG(); 0; })
#define hugetlb_fault(mm, vma, addr, flags)	({ BUG(); 0; })
#define huge_pte_offset(mm, address)	0
#define dequeue_hwpoisoned_huge_page(page)	0
static inline void copy_huge_page(struct page *dst, struct page *src)
{
}

#define hugetlb_change_protection(vma, address, end, newprot)

#endif /* !CONFIG_HUGETLB_PAGE */

#define HUGETLB_ANON_FILE "anon_hugepage"

enum {
	/*
	 * The file will be used as an shm file so shmfs accounting rules
	 * apply
	 */
	HUGETLB_SHMFS_INODE     = 1,
	/*
	 * The file is being created on the internal vfs mount and shmfs
	 * accounting rules do not apply
	 */
	HUGETLB_ANONHUGE_INODE  = 2,
};

#ifdef CONFIG_HUGETLBFS
struct hugetlbfs_sb_info {
	long	max_inodes;   /* inodes allowed */
	long	free_inodes;  /* inodes free */
	spinlock_t	stat_lock;
	struct hstate *hstate;
	struct hugepage_subpool *spool;
};

static inline struct hugetlbfs_sb_info *HUGETLBFS_SB(struct super_block *sb)
{
	return sb->s_fs_info;
}

extern const struct file_operations hugetlbfs_file_operations;
extern const struct vm_operations_struct hugetlb_vm_ops;
struct file *hugetlb_file_setup(const char *name, unsigned long addr,
				size_t size, vm_flags_t acct,
				struct user_struct **user, int creat_flags);

static inline int is_file_hugepages(struct file *file)
{
	if (file->f_op == &hugetlbfs_file_operations)
		return 1;
	if (is_file_shm_hugepages(file))
		return 1;

	return 0;
}

#else /* !CONFIG_HUGETLBFS */

#define is_file_hugepages(file)			0
static inline struct file *
hugetlb_file_setup(const char *name, unsigned long addr, size_t size,
		vm_flags_t acctflag, struct user_struct **user, int creat_flags)
{
	return ERR_PTR(-ENOSYS);
}

#endif /* !CONFIG_HUGETLBFS */

#ifdef HAVE_ARCH_HUGETLB_UNMAPPED_AREA
unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
					unsigned long len, unsigned long pgoff,
					unsigned long flags);
#endif /* HAVE_ARCH_HUGETLB_UNMAPPED_AREA */

#ifdef CONFIG_HUGETLB_PAGE

#define HSTATE_NAME_LEN 32
/* Defines one hugetlb page size */
struct hstate {
	int next_nid_to_alloc;
	int next_nid_to_free;
	unsigned int order;
	unsigned long mask;
	unsigned long max_huge_pages;
	unsigned long nr_huge_pages;
	unsigned long free_huge_pages;
	unsigned long resv_huge_pages;
	unsigned long surplus_huge_pages;
	unsigned long nr_overcommit_huge_pages;
	struct list_head hugepage_freelists[MAX_NUMNODES];
	unsigned int nr_huge_pages_node[MAX_NUMNODES];
	unsigned int free_huge_pages_node[MAX_NUMNODES];
	unsigned int surplus_huge_pages_node[MAX_NUMNODES];
	char name[HSTATE_NAME_LEN];
};

struct huge_bootmem_page {
	struct list_head list;
	struct hstate *hstate;
#ifdef CONFIG_HIGHMEM
	phys_addr_t phys;
#endif
};

struct page *alloc_huge_page_node(struct hstate *h, int nid);

/* arch callback */
int __init alloc_bootmem_huge_page(struct hstate *h);

void __init hugetlb_add_hstate(unsigned order);
struct hstate *size_to_hstate(unsigned long size);

#ifndef HUGE_MAX_HSTATE
#define HUGE_MAX_HSTATE 1
#endif

extern struct hstate hstates[HUGE_MAX_HSTATE];
extern unsigned int default_hstate_idx;

#define default_hstate (hstates[default_hstate_idx])

static inline struct hstate *hstate_inode(struct inode *i)
{
	struct hugetlbfs_sb_info *hsb;
	hsb = HUGETLBFS_SB(i->i_sb);
	return hsb->hstate;
}

static inline struct hstate *hstate_file(struct file *f)
{
	return hstate_inode(f->f_dentry->d_inode);
}

static inline struct hstate *hstate_vma(struct vm_area_struct *vma)
{
	return hstate_file(vma->vm_file);
}

static inline unsigned long huge_page_size(struct hstate *h)
{
	return (unsigned long)PAGE_SIZE << h->order;
}

extern unsigned long vma_kernel_pagesize(struct vm_area_struct *vma);

extern unsigned long vma_mmu_pagesize(struct vm_area_struct *vma);

static inline unsigned long huge_page_mask(struct hstate *h)
{
	return h->mask;
}

static inline unsigned int huge_page_order(struct hstate *h)
{
	return h->order;
}

static inline unsigned huge_page_shift(struct hstate *h)
{
	return h->order + PAGE_SHIFT;
}

static inline unsigned int pages_per_huge_page(struct hstate *h)
{
	return 1 << h->order;
}

static inline unsigned int blocks_per_huge_page(struct hstate *h)
{
	return huge_page_size(h) / 512;
}

#include <asm/hugetlb.h>

#ifndef arch_make_huge_pte
static inline pte_t arch_make_huge_pte(pte_t entry, struct vm_area_struct *vma,
				       struct page *page, int writable)
{
	return entry;
}
#endif

static inline struct hstate *page_hstate(struct page *page)
{
	return size_to_hstate(PAGE_SIZE << compound_order(page));
}

static inline unsigned hstate_index_to_shift(unsigned index)
{
	return hstates[index].order + PAGE_SHIFT;
}

#else
struct hstate {};
#define alloc_huge_page_node(h, nid) NULL
#define alloc_bootmem_huge_page(h) NULL
#define hstate_file(f) NULL
#define hstate_vma(v) NULL
#define hstate_inode(i) NULL
#define huge_page_size(h) PAGE_SIZE
#define huge_page_mask(h) PAGE_MASK
#define vma_kernel_pagesize(v) PAGE_SIZE
#define vma_mmu_pagesize(v) PAGE_SIZE
#define huge_page_order(h) 0
#define huge_page_shift(h) PAGE_SHIFT
static inline unsigned int pages_per_huge_page(struct hstate *h)
{
	return 1;
}
#define hstate_index_to_shift(index) 0
#endif

#endif /* _LINUX_HUGETLB_H */
Commit	Line	Data
1da177e4 LT	1	#ifndef _LINUX_HUGETLB_H
	2	#define _LINUX_HUGETLB_H
	3
be93d8cf	4	#include <linux/mm_types.h>
4e950f6f	5	#include <linux/fs.h>
8edf344c	6	#include <linux/hugetlb_inline.h>
4e950f6f	7
e9ea0e2d AM	8	struct ctl_table;
	9	struct user_struct;
	10
1da177e4 LT	11	#ifdef CONFIG_HUGETLB_PAGE
	12
	13	#include <linux/mempolicy.h>
516dffdc	14	#include <linux/shm.h>
63551ae0	15	#include <asm/tlbflush.h>
1da177e4	16
90481622 DG	17	struct hugepage_subpool {
	18	spinlock_t lock;
	19	long count;
	20	long max_hpages, used_hpages;
	21	};
	22
	23	struct hugepage_subpool *hugepage_new_subpool(long nr_blocks);
	24	void hugepage_put_subpool(struct hugepage_subpool *spool);
	25
20a0307c WF	26	int PageHuge(struct page *page);
20a0307c WF	27
a1e78772	28	void reset_vma_resv_huge_pages(struct vm_area_struct *vma);
8d65af78 AD	29	int hugetlb_sysctl_handler(struct ctl_table , int, void __user , size_t , loff_t );
	30	int hugetlb_overcommit_handler(struct ctl_table , int, void __user , size_t , loff_t );
	31	int hugetlb_treat_movable_handler(struct ctl_table , int, void __user , size_t , loff_t );
06808b08 LS	32
	33	#ifdef CONFIG_NUMA
	34	int hugetlb_mempolicy_sysctl_handler(struct ctl_table *, int,
	35	void __user , size_t , loff_t *);
	36	#endif
	37
1da177e4	38	int copy_hugetlb_page_range(struct mm_struct , struct mm_struct , struct vm_area_struct *);
2a15efc9 HD	39	int follow_hugetlb_page(struct mm_struct , struct vm_area_struct ,
	40	struct page , struct vm_area_struct ,
	41	unsigned long , int , int, unsigned int flags);
04f2cbe3 MG	42	void unmap_hugepage_range(struct vm_area_struct *,
	43	unsigned long, unsigned long, struct page *);
	44	void __unmap_hugepage_range(struct vm_area_struct *,
	45	unsigned long, unsigned long, struct page *);
1da177e4	46	int hugetlb_prefault(struct address_space , struct vm_area_struct );
e1759c21	47	void hugetlb_report_meminfo(struct seq_file *);
1da177e4	48	int hugetlb_report_node_meminfo(int, char *);
1da177e4	49	unsigned long hugetlb_total_pages(void);
ac9b9c66	50	int hugetlb_fault(struct mm_struct mm, struct vm_area_struct vma,
788c7df4	51	unsigned long address, unsigned int flags);
a1e78772	52	int hugetlb_reserve_pages(struct inode *inode, long from, long to,
5a6fe125	53	struct vm_area_struct *vma,
ca16d140	54	vm_flags_t vm_flags);
a43a8c39	55	void hugetlb_unreserve_pages(struct inode *inode, long offset, long freed);
6de2b1aa	56	int dequeue_hwpoisoned_huge_page(struct page *page);
0ebabb41	57	void copy_huge_page(struct page dst, struct page src);
1da177e4	58
396faf03	59	extern unsigned long hugepages_treat_as_movable;
1da177e4 LT	60	extern const unsigned long hugetlb_zero, hugetlb_infinity;
1da177e4 LT	61	extern int sysctl_hugetlb_shm_group;
53ba51d2	62	extern struct list_head huge_boot_pages;
1da177e4	63
63551ae0 DG	64	/* arch callbacks */
63551ae0 DG	65
a5516438 AK	66	pte_t huge_pte_alloc(struct mm_struct mm,
a5516438 AK	67	unsigned long addr, unsigned long sz);
63551ae0	68	pte_t huge_pte_offset(struct mm_struct mm, unsigned long addr);
39dde65c	69	int huge_pmd_unshare(struct mm_struct mm, unsigned long addr, pte_t *ptep);
63551ae0 DG	70	struct page follow_huge_addr(struct mm_struct mm, unsigned long address,
	71	int write);
	72	struct page follow_huge_pmd(struct mm_struct mm, unsigned long address,
	73	pmd_t *pmd, int write);
ceb86879 AK	74	struct page follow_huge_pud(struct mm_struct mm, unsigned long address,
ceb86879 AK	75	pud_t *pud, int write);
63551ae0	76	int pmd_huge(pmd_t pmd);
ceb86879	77	int pud_huge(pud_t pmd);
8f860591 ZY	78	void hugetlb_change_protection(struct vm_area_struct *vma,
8f860591 ZY	79	unsigned long address, unsigned long end, pgprot_t newprot);
63551ae0	80
1da177e4 LT	81	#else /* !CONFIG_HUGETLB_PAGE */
1da177e4 LT	82
20a0307c WF	83	static inline int PageHuge(struct page *page)
	84	{
	85	return 0;
	86	}
	87
a1e78772 MG	88	static inline void reset_vma_resv_huge_pages(struct vm_area_struct *vma)
	89	{
	90	}
	91
1da177e4 LT	92	static inline unsigned long hugetlb_total_pages(void)
	93	{
	94	return 0;
	95	}
	96
5b23dbe8	97	#define follow_hugetlb_page(m,v,p,vs,a,b,i,w) ({ BUG(); 0; })
1da177e4 LT	98	#define follow_huge_addr(mm, addr, write) ERR_PTR(-EINVAL)
	99	#define copy_hugetlb_page_range(src, dst, vma) ({ BUG(); 0; })
	100	#define hugetlb_prefault(mapping, vma) ({ BUG(); 0; })
04f2cbe3	101	#define unmap_hugepage_range(vma, start, end, page) BUG()
e1759c21 AD	102	static inline void hugetlb_report_meminfo(struct seq_file *m)
	103	{
	104	}
1da177e4 LT	105	#define hugetlb_report_node_meminfo(n, buf) 0
1da177e4 LT	106	#define follow_huge_pmd(mm, addr, pmd, write) NULL
ceb86879	107	#define follow_huge_pud(mm, addr, pud, write) NULL
a5516438	108	#define prepare_hugepage_range(file, addr, len) (-EINVAL)
1da177e4	109	#define pmd_huge(x) 0
ceb86879	110	#define pud_huge(x) 0
1da177e4	111	#define is_hugepage_only_range(mm, addr, len) 0
9da61aef	112	#define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) ({BUG(); 0; })
788c7df4	113	#define hugetlb_fault(mm, vma, addr, flags) ({ BUG(); 0; })
0fe6e20b	114	#define huge_pte_offset(mm, address) 0
6de2b1aa	115	#define dequeue_hwpoisoned_huge_page(page) 0
0ebabb41 NH	116	static inline void copy_huge_page(struct page dst, struct page src)
	117	{
	118	}
1da177e4	119
8f860591 ZY	120	#define hugetlb_change_protection(vma, address, end, newprot)
8f860591 ZY	121
1da177e4 LT	122	#endif /* !CONFIG_HUGETLB_PAGE */
1da177e4 LT	123
4e52780d EM	124	#define HUGETLB_ANON_FILE "anon_hugepage"
4e52780d EM	125
6bfde05b EM	126	enum {
	127	/*
	128	* The file will be used as an shm file so shmfs accounting rules
	129	* apply
	130	*/
	131	HUGETLB_SHMFS_INODE = 1,
4e52780d EM	132	/*
	133	* The file is being created on the internal vfs mount and shmfs
	134	* accounting rules do not apply
	135	*/
	136	HUGETLB_ANONHUGE_INODE = 2,
6bfde05b EM	137	};
6bfde05b EM	138
1da177e4	139	#ifdef CONFIG_HUGETLBFS
1da177e4	140	struct hugetlbfs_sb_info {
1da177e4 LT	141	long max_inodes; /* inodes allowed */
	142	long free_inodes; /* inodes free */
	143	spinlock_t stat_lock;
a137e1cc	144	struct hstate *hstate;
90481622	145	struct hugepage_subpool *spool;
1da177e4 LT	146	};
1da177e4 LT	147
1da177e4 LT	148	static inline struct hugetlbfs_sb_info HUGETLBFS_SB(struct super_block sb)
	149	{
	150	return sb->s_fs_info;
	151	}
	152
4b6f5d20	153	extern const struct file_operations hugetlbfs_file_operations;
f0f37e2f	154	extern const struct vm_operations_struct hugetlb_vm_ops;
40716e29 ST	155	struct file hugetlb_file_setup(const char name, unsigned long addr,
40716e29 ST	156	size_t size, vm_flags_t acct,
6bfde05b	157	struct user_struct **user, int creat_flags);
1da177e4 LT	158
	159	static inline int is_file_hugepages(struct file *file)
	160	{
516dffdc AL	161	if (file->f_op == &hugetlbfs_file_operations)
	162	return 1;
	163	if (is_file_shm_hugepages(file))
	164	return 1;
	165
	166	return 0;
1da177e4 LT	167	}
1da177e4 LT	168
1da177e4 LT	169	#else /* !CONFIG_HUGETLBFS */
1da177e4 LT	170
1db8508c	171	#define is_file_hugepages(file) 0
40716e29 ST	172	static inline struct file *
40716e29 ST	173	hugetlb_file_setup(const char *name, unsigned long addr, size_t size,
ca16d140	174	vm_flags_t acctflag, struct user_struct **user, int creat_flags)
e9ea0e2d AM	175	{
	176	return ERR_PTR(-ENOSYS);
	177	}
1da177e4 LT	178
	179	#endif /* !CONFIG_HUGETLBFS */
	180
d2ba27e8 AB	181	#ifdef HAVE_ARCH_HUGETLB_UNMAPPED_AREA
	182	unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
	183	unsigned long len, unsigned long pgoff,
	184	unsigned long flags);
	185	#endif /* HAVE_ARCH_HUGETLB_UNMAPPED_AREA */
	186
a5516438 AK	187	#ifdef CONFIG_HUGETLB_PAGE
a5516438 AK	188
a3437870	189	#define HSTATE_NAME_LEN 32
a5516438 AK	190	/* Defines one hugetlb page size */
a5516438 AK	191	struct hstate {
e8c5c824 LS	192	int next_nid_to_alloc;
e8c5c824 LS	193	int next_nid_to_free;
a5516438 AK	194	unsigned int order;
	195	unsigned long mask;
	196	unsigned long max_huge_pages;
	197	unsigned long nr_huge_pages;
	198	unsigned long free_huge_pages;
	199	unsigned long resv_huge_pages;
	200	unsigned long surplus_huge_pages;
	201	unsigned long nr_overcommit_huge_pages;
	202	struct list_head hugepage_freelists[MAX_NUMNODES];
	203	unsigned int nr_huge_pages_node[MAX_NUMNODES];
	204	unsigned int free_huge_pages_node[MAX_NUMNODES];
	205	unsigned int surplus_huge_pages_node[MAX_NUMNODES];
a3437870	206	char name[HSTATE_NAME_LEN];
a5516438 AK	207	};
a5516438 AK	208
53ba51d2 JT	209	struct huge_bootmem_page {
	210	struct list_head list;
	211	struct hstate *hstate;
ee8f248d BB	212	#ifdef CONFIG_HIGHMEM
	213	phys_addr_t phys;
	214	#endif
53ba51d2 JT	215	};
53ba51d2 JT	216
bf50bab2 NH	217	struct page alloc_huge_page_node(struct hstate h, int nid);
bf50bab2 NH	218
53ba51d2 JT	219	/* arch callback */
	220	int __init alloc_bootmem_huge_page(struct hstate *h);
	221
e5ff2159 AK	222	void __init hugetlb_add_hstate(unsigned order);
	223	struct hstate *size_to_hstate(unsigned long size);
	224
	225	#ifndef HUGE_MAX_HSTATE
	226	#define HUGE_MAX_HSTATE 1
	227	#endif
	228
	229	extern struct hstate hstates[HUGE_MAX_HSTATE];
	230	extern unsigned int default_hstate_idx;
	231
	232	#define default_hstate (hstates[default_hstate_idx])
a5516438	233
a137e1cc	234	static inline struct hstate hstate_inode(struct inode i)
a5516438	235	{
a137e1cc AK	236	struct hugetlbfs_sb_info *hsb;
	237	hsb = HUGETLBFS_SB(i->i_sb);
	238	return hsb->hstate;
a5516438 AK	239	}
	240
	241	static inline struct hstate hstate_file(struct file f)
	242	{
a137e1cc	243	return hstate_inode(f->f_dentry->d_inode);
a5516438 AK	244	}
a5516438 AK	245
a137e1cc	246	static inline struct hstate hstate_vma(struct vm_area_struct vma)
a5516438	247	{
a137e1cc	248	return hstate_file(vma->vm_file);
a5516438 AK	249	}
	250
	251	static inline unsigned long huge_page_size(struct hstate *h)
	252	{
	253	return (unsigned long)PAGE_SIZE << h->order;
	254	}
	255
08fba699 MG	256	extern unsigned long vma_kernel_pagesize(struct vm_area_struct *vma);
08fba699 MG	257
3340289d MG	258	extern unsigned long vma_mmu_pagesize(struct vm_area_struct *vma);
3340289d MG	259
a5516438 AK	260	static inline unsigned long huge_page_mask(struct hstate *h)
	261	{
	262	return h->mask;
	263	}
	264
	265	static inline unsigned int huge_page_order(struct hstate *h)
	266	{
	267	return h->order;
	268	}
	269
	270	static inline unsigned huge_page_shift(struct hstate *h)
	271	{
	272	return h->order + PAGE_SHIFT;
	273	}
	274
	275	static inline unsigned int pages_per_huge_page(struct hstate *h)
	276	{
	277	return 1 << h->order;
	278	}
	279
	280	static inline unsigned int blocks_per_huge_page(struct hstate *h)
	281	{
	282	return huge_page_size(h) / 512;
	283	}
	284
	285	#include <asm/hugetlb.h>
	286
d9ed9faa CM	287	#ifndef arch_make_huge_pte
	288	static inline pte_t arch_make_huge_pte(pte_t entry, struct vm_area_struct *vma,
	289	struct page *page, int writable)
	290	{
	291	return entry;
	292	}
	293	#endif
	294
e5ff2159 AK	295	static inline struct hstate page_hstate(struct page page)
	296	{
	297	return size_to_hstate(PAGE_SIZE << compound_order(page));
	298	}
	299
aa50d3a7 AK	300	static inline unsigned hstate_index_to_shift(unsigned index)
	301	{
	302	return hstates[index].order + PAGE_SHIFT;
	303	}
	304
a5516438 AK	305	#else
a5516438 AK	306	struct hstate {};
bf50bab2	307	#define alloc_huge_page_node(h, nid) NULL
53ba51d2	308	#define alloc_bootmem_huge_page(h) NULL
a5516438 AK	309	#define hstate_file(f) NULL
	310	#define hstate_vma(v) NULL
	311	#define hstate_inode(i) NULL
	312	#define huge_page_size(h) PAGE_SIZE
	313	#define huge_page_mask(h) PAGE_MASK
08fba699	314	#define vma_kernel_pagesize(v) PAGE_SIZE
3340289d	315	#define vma_mmu_pagesize(v) PAGE_SIZE
a5516438 AK	316	#define huge_page_order(h) 0
a5516438 AK	317	#define huge_page_shift(h) PAGE_SHIFT
510a35d4 AR	318	static inline unsigned int pages_per_huge_page(struct hstate *h)
	319	{
	320	return 1;
	321	}
aa50d3a7	322	#define hstate_index_to_shift(index) 0
a5516438 AK	323	#endif
a5516438 AK	324
1da177e4	325	#endif /* _LINUX_HUGETLB_H */