1 #ifndef _LINUX_HUGETLB_H
2 #define _LINUX_HUGETLB_H
6 #ifdef CONFIG_HUGETLB_PAGE
8 #include <linux/mempolicy.h>
10 #include <asm/tlbflush.h>
11 #include <asm/hugetlb.h>
15 static inline int is_vm_hugetlb_page(struct vm_area_struct
*vma
)
17 return vma
->vm_flags
& VM_HUGETLB
;
20 void reset_vma_resv_huge_pages(struct vm_area_struct
*vma
);
21 int hugetlb_sysctl_handler(struct ctl_table
*, int, struct file
*, void __user
*, size_t *, loff_t
*);
22 int hugetlb_overcommit_handler(struct ctl_table
*, int, struct file
*, void __user
*, size_t *, loff_t
*);
23 int hugetlb_treat_movable_handler(struct ctl_table
*, int, struct file
*, void __user
*, size_t *, loff_t
*);
24 int copy_hugetlb_page_range(struct mm_struct
*, struct mm_struct
*, struct vm_area_struct
*);
25 int follow_hugetlb_page(struct mm_struct
*, struct vm_area_struct
*, struct page
**, struct vm_area_struct
**, unsigned long *, int *, int, int);
26 void unmap_hugepage_range(struct vm_area_struct
*,
27 unsigned long, unsigned long, struct page
*);
28 void __unmap_hugepage_range(struct vm_area_struct
*,
29 unsigned long, unsigned long, struct page
*);
30 int hugetlb_prefault(struct address_space
*, struct vm_area_struct
*);
31 int hugetlb_report_meminfo(char *);
32 int hugetlb_report_node_meminfo(int, char *);
33 unsigned long hugetlb_total_pages(void);
34 int hugetlb_fault(struct mm_struct
*mm
, struct vm_area_struct
*vma
,
35 unsigned long address
, int write_access
);
36 int hugetlb_reserve_pages(struct inode
*inode
, long from
, long to
,
37 struct vm_area_struct
*vma
);
38 void hugetlb_unreserve_pages(struct inode
*inode
, long offset
, long freed
);
40 extern unsigned long max_huge_pages
;
41 extern unsigned long sysctl_overcommit_huge_pages
;
42 extern unsigned long hugepages_treat_as_movable
;
43 extern const unsigned long hugetlb_zero
, hugetlb_infinity
;
44 extern int sysctl_hugetlb_shm_group
;
48 pte_t
*huge_pte_alloc(struct mm_struct
*mm
, unsigned long addr
);
49 pte_t
*huge_pte_offset(struct mm_struct
*mm
, unsigned long addr
);
50 int huge_pmd_unshare(struct mm_struct
*mm
, unsigned long *addr
, pte_t
*ptep
);
51 struct page
*follow_huge_addr(struct mm_struct
*mm
, unsigned long address
,
53 struct page
*follow_huge_pmd(struct mm_struct
*mm
, unsigned long address
,
54 pmd_t
*pmd
, int write
);
55 int pmd_huge(pmd_t pmd
);
56 void hugetlb_change_protection(struct vm_area_struct
*vma
,
57 unsigned long address
, unsigned long end
, pgprot_t newprot
);
59 #else /* !CONFIG_HUGETLB_PAGE */
61 static inline int is_vm_hugetlb_page(struct vm_area_struct
*vma
)
66 static inline void reset_vma_resv_huge_pages(struct vm_area_struct
*vma
)
70 static inline unsigned long hugetlb_total_pages(void)
75 #define follow_hugetlb_page(m,v,p,vs,a,b,i,w) ({ BUG(); 0; })
76 #define follow_huge_addr(mm, addr, write) ERR_PTR(-EINVAL)
77 #define copy_hugetlb_page_range(src, dst, vma) ({ BUG(); 0; })
78 #define hugetlb_prefault(mapping, vma) ({ BUG(); 0; })
79 #define unmap_hugepage_range(vma, start, end, page) BUG()
80 #define hugetlb_report_meminfo(buf) 0
81 #define hugetlb_report_node_meminfo(n, buf) 0
82 #define follow_huge_pmd(mm, addr, pmd, write) NULL
83 #define prepare_hugepage_range(addr,len) (-EINVAL)
85 #define is_hugepage_only_range(mm, addr, len) 0
86 #define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) ({BUG(); 0; })
87 #define hugetlb_fault(mm, vma, addr, write) ({ BUG(); 0; })
89 #define hugetlb_change_protection(vma, address, end, newprot)
92 #define HPAGE_MASK PAGE_MASK /* Keep the compiler happy */
93 #define HPAGE_SIZE PAGE_SIZE
96 #endif /* !CONFIG_HUGETLB_PAGE */
98 #ifdef CONFIG_HUGETLBFS
99 struct hugetlbfs_config
{
107 struct hugetlbfs_sb_info
{
108 long max_blocks
; /* blocks allowed */
109 long free_blocks
; /* blocks free */
110 long max_inodes
; /* inodes allowed */
111 long free_inodes
; /* inodes free */
112 spinlock_t stat_lock
;
116 struct hugetlbfs_inode_info
{
117 struct shared_policy policy
;
118 struct inode vfs_inode
;
121 static inline struct hugetlbfs_inode_info
*HUGETLBFS_I(struct inode
*inode
)
123 return container_of(inode
, struct hugetlbfs_inode_info
, vfs_inode
);
126 static inline struct hugetlbfs_sb_info
*HUGETLBFS_SB(struct super_block
*sb
)
128 return sb
->s_fs_info
;
131 extern const struct file_operations hugetlbfs_file_operations
;
132 extern struct vm_operations_struct hugetlb_vm_ops
;
133 struct file
*hugetlb_file_setup(const char *name
, size_t);
134 int hugetlb_get_quota(struct address_space
*mapping
, long delta
);
135 void hugetlb_put_quota(struct address_space
*mapping
, long delta
);
137 #define BLOCKS_PER_HUGEPAGE (HPAGE_SIZE / 512)
139 static inline int is_file_hugepages(struct file
*file
)
141 if (file
->f_op
== &hugetlbfs_file_operations
)
143 if (is_file_shm_hugepages(file
))
149 static inline void set_file_hugepages(struct file
*file
)
151 file
->f_op
= &hugetlbfs_file_operations
;
153 #else /* !CONFIG_HUGETLBFS */
155 #define is_file_hugepages(file) 0
156 #define set_file_hugepages(file) BUG()
157 #define hugetlb_file_setup(name,size) ERR_PTR(-ENOSYS)
159 #endif /* !CONFIG_HUGETLBFS */
161 #ifdef HAVE_ARCH_HUGETLB_UNMAPPED_AREA
162 unsigned long hugetlb_get_unmapped_area(struct file
*file
, unsigned long addr
,
163 unsigned long len
, unsigned long pgoff
,
164 unsigned long flags
);
165 #endif /* HAVE_ARCH_HUGETLB_UNMAPPED_AREA */
167 #endif /* _LINUX_HUGETLB_H */