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
*, unsigned long, unsigned long);
27 void __unmap_hugepage_range(struct vm_area_struct
*, unsigned long, unsigned long);
28 int hugetlb_prefault(struct address_space
*, struct vm_area_struct
*);
29 int hugetlb_report_meminfo(char *);
30 int hugetlb_report_node_meminfo(int, char *);
31 unsigned long hugetlb_total_pages(void);
32 int hugetlb_fault(struct mm_struct
*mm
, struct vm_area_struct
*vma
,
33 unsigned long address
, int write_access
);
34 int hugetlb_reserve_pages(struct inode
*inode
, long from
, long to
,
35 struct vm_area_struct
*vma
);
36 void hugetlb_unreserve_pages(struct inode
*inode
, long offset
, long freed
);
38 extern unsigned long max_huge_pages
;
39 extern unsigned long sysctl_overcommit_huge_pages
;
40 extern unsigned long hugepages_treat_as_movable
;
41 extern const unsigned long hugetlb_zero
, hugetlb_infinity
;
42 extern int sysctl_hugetlb_shm_group
;
46 pte_t
*huge_pte_alloc(struct mm_struct
*mm
, unsigned long addr
);
47 pte_t
*huge_pte_offset(struct mm_struct
*mm
, unsigned long addr
);
48 int huge_pmd_unshare(struct mm_struct
*mm
, unsigned long *addr
, pte_t
*ptep
);
49 struct page
*follow_huge_addr(struct mm_struct
*mm
, unsigned long address
,
51 struct page
*follow_huge_pmd(struct mm_struct
*mm
, unsigned long address
,
52 pmd_t
*pmd
, int write
);
53 int pmd_huge(pmd_t pmd
);
54 void hugetlb_change_protection(struct vm_area_struct
*vma
,
55 unsigned long address
, unsigned long end
, pgprot_t newprot
);
57 #else /* !CONFIG_HUGETLB_PAGE */
59 static inline int is_vm_hugetlb_page(struct vm_area_struct
*vma
)
64 static inline void reset_vma_resv_huge_pages(struct vm_area_struct
*vma
)
68 static inline unsigned long hugetlb_total_pages(void)
73 #define follow_hugetlb_page(m,v,p,vs,a,b,i,w) ({ BUG(); 0; })
74 #define follow_huge_addr(mm, addr, write) ERR_PTR(-EINVAL)
75 #define copy_hugetlb_page_range(src, dst, vma) ({ BUG(); 0; })
76 #define hugetlb_prefault(mapping, vma) ({ BUG(); 0; })
77 #define unmap_hugepage_range(vma, start, end) BUG()
78 #define hugetlb_report_meminfo(buf) 0
79 #define hugetlb_report_node_meminfo(n, buf) 0
80 #define follow_huge_pmd(mm, addr, pmd, write) NULL
81 #define prepare_hugepage_range(addr,len) (-EINVAL)
83 #define is_hugepage_only_range(mm, addr, len) 0
84 #define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) ({BUG(); 0; })
85 #define hugetlb_fault(mm, vma, addr, write) ({ BUG(); 0; })
87 #define hugetlb_change_protection(vma, address, end, newprot)
90 #define HPAGE_MASK PAGE_MASK /* Keep the compiler happy */
91 #define HPAGE_SIZE PAGE_SIZE
94 #endif /* !CONFIG_HUGETLB_PAGE */
96 #ifdef CONFIG_HUGETLBFS
97 struct hugetlbfs_config
{
105 struct hugetlbfs_sb_info
{
106 long max_blocks
; /* blocks allowed */
107 long free_blocks
; /* blocks free */
108 long max_inodes
; /* inodes allowed */
109 long free_inodes
; /* inodes free */
110 spinlock_t stat_lock
;
114 struct hugetlbfs_inode_info
{
115 struct shared_policy policy
;
116 struct inode vfs_inode
;
119 static inline struct hugetlbfs_inode_info
*HUGETLBFS_I(struct inode
*inode
)
121 return container_of(inode
, struct hugetlbfs_inode_info
, vfs_inode
);
124 static inline struct hugetlbfs_sb_info
*HUGETLBFS_SB(struct super_block
*sb
)
126 return sb
->s_fs_info
;
129 extern const struct file_operations hugetlbfs_file_operations
;
130 extern struct vm_operations_struct hugetlb_vm_ops
;
131 struct file
*hugetlb_file_setup(const char *name
, size_t);
132 int hugetlb_get_quota(struct address_space
*mapping
, long delta
);
133 void hugetlb_put_quota(struct address_space
*mapping
, long delta
);
135 #define BLOCKS_PER_HUGEPAGE (HPAGE_SIZE / 512)
137 static inline int is_file_hugepages(struct file
*file
)
139 if (file
->f_op
== &hugetlbfs_file_operations
)
141 if (is_file_shm_hugepages(file
))
147 static inline void set_file_hugepages(struct file
*file
)
149 file
->f_op
= &hugetlbfs_file_operations
;
151 #else /* !CONFIG_HUGETLBFS */
153 #define is_file_hugepages(file) 0
154 #define set_file_hugepages(file) BUG()
155 #define hugetlb_file_setup(name,size) ERR_PTR(-ENOSYS)
157 #endif /* !CONFIG_HUGETLBFS */
159 #ifdef HAVE_ARCH_HUGETLB_UNMAPPED_AREA
160 unsigned long hugetlb_get_unmapped_area(struct file
*file
, unsigned long addr
,
161 unsigned long len
, unsigned long pgoff
,
162 unsigned long flags
);
163 #endif /* HAVE_ARCH_HUGETLB_UNMAPPED_AREA */
165 #endif /* _LINUX_HUGETLB_H */