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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 422 | giacomo | 1 | #ifndef _LINUX_HUGETLB_H |
| 2 | #define _LINUX_HUGETLB_H |
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| 3 | |||
| 4 | #ifdef CONFIG_HUGETLB_PAGE |
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| 5 | |||
| 6 | struct ctl_table; |
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| 7 | |||
| 8 | static inline int is_vm_hugetlb_page(struct vm_area_struct *vma) |
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| 9 | { |
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| 10 | return vma->vm_flags & VM_HUGETLB; |
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| 11 | } |
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| 12 | |||
| 13 | int hugetlb_sysctl_handler(struct ctl_table *, int, struct file *, void *, size_t *); |
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| 14 | int copy_hugetlb_page_range(struct mm_struct *, struct mm_struct *, struct vm_area_struct *); |
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| 15 | int follow_hugetlb_page(struct mm_struct *, struct vm_area_struct *, struct page **, struct vm_area_struct **, unsigned long *, int *, int); |
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| 16 | void zap_hugepage_range(struct vm_area_struct *, unsigned long, unsigned long); |
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| 17 | void unmap_hugepage_range(struct vm_area_struct *, unsigned long, unsigned long); |
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| 18 | int hugetlb_prefault(struct address_space *, struct vm_area_struct *); |
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| 19 | void huge_page_release(struct page *); |
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| 20 | int hugetlb_report_meminfo(char *); |
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| 21 | int is_hugepage_mem_enough(size_t); |
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| 22 | struct page *follow_huge_addr(struct mm_struct *mm, struct vm_area_struct *vma, |
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| 23 | unsigned long address, int write); |
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| 24 | struct vm_area_struct *hugepage_vma(struct mm_struct *mm, |
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| 25 | unsigned long address); |
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| 26 | struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address, |
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| 27 | pmd_t *pmd, int write); |
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| 28 | int is_aligned_hugepage_range(unsigned long addr, unsigned long len); |
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| 29 | int pmd_huge(pmd_t pmd); |
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| 30 | |||
| 31 | extern int htlbpage_max; |
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| 32 | |||
| 33 | static inline void |
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| 34 | mark_mm_hugetlb(struct mm_struct *mm, struct vm_area_struct *vma) |
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| 35 | { |
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| 36 | if (is_vm_hugetlb_page(vma)) |
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| 37 | mm->used_hugetlb = 1; |
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| 38 | } |
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| 39 | |||
| 40 | #ifndef ARCH_HAS_HUGEPAGE_ONLY_RANGE |
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| 41 | #define is_hugepage_only_range(addr, len) 0 |
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| 42 | #endif |
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| 43 | |||
| 44 | #else /* !CONFIG_HUGETLB_PAGE */ |
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| 45 | |||
| 46 | static inline int is_vm_hugetlb_page(struct vm_area_struct *vma) |
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| 47 | { |
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| 48 | return 0; |
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| 49 | } |
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| 50 | |||
| 51 | #define follow_hugetlb_page(m,v,p,vs,a,b,i) ({ BUG(); 0; }) |
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| 52 | #define follow_huge_addr(mm, vma, addr, write) 0 |
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| 53 | #define copy_hugetlb_page_range(src, dst, vma) ({ BUG(); 0; }) |
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| 54 | #define hugetlb_prefault(mapping, vma) ({ BUG(); 0; }) |
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| 55 | #define zap_hugepage_range(vma, start, len) BUG() |
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| 56 | #define unmap_hugepage_range(vma, start, end) BUG() |
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| 57 | #define huge_page_release(page) BUG() |
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| 58 | #define is_hugepage_mem_enough(size) 0 |
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| 59 | #define hugetlb_report_meminfo(buf) 0 |
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| 60 | #define hugepage_vma(mm, addr) 0 |
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| 61 | #define mark_mm_hugetlb(mm, vma) do { } while (0) |
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| 62 | #define follow_huge_pmd(mm, addr, pmd, write) 0 |
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| 63 | #define is_aligned_hugepage_range(addr, len) 0 |
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| 64 | #define pmd_huge(x) 0 |
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| 65 | #define is_hugepage_only_range(addr, len) 0 |
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| 66 | |||
| 67 | #ifndef HPAGE_MASK |
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| 68 | #define HPAGE_MASK 0 /* Keep the compiler happy */ |
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| 69 | #define HPAGE_SIZE 0 |
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| 70 | #endif |
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| 71 | |||
| 72 | #endif /* !CONFIG_HUGETLB_PAGE */ |
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| 73 | |||
| 74 | #ifdef CONFIG_HUGETLBFS |
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| 75 | struct hugetlbfs_config { |
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| 76 | uid_t uid; |
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| 77 | gid_t gid; |
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| 78 | umode_t mode; |
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| 79 | long nr_blocks; |
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| 80 | long nr_inodes; |
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| 81 | }; |
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| 82 | |||
| 83 | struct hugetlbfs_sb_info { |
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| 84 | long max_blocks; /* blocks allowed */ |
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| 85 | long free_blocks; /* blocks free */ |
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| 86 | long max_inodes; /* inodes allowed */ |
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| 87 | long free_inodes; /* inodes free */ |
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| 88 | spinlock_t stat_lock; |
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| 89 | }; |
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| 90 | |||
| 91 | static inline struct hugetlbfs_sb_info *HUGETLBFS_SB(struct super_block *sb) |
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| 92 | { |
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| 93 | return sb->s_fs_info; |
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| 94 | } |
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| 95 | |||
| 96 | #define PSEUDO_DIRENT_SIZE 20 |
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| 97 | |||
| 98 | extern struct file_operations hugetlbfs_file_operations; |
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| 99 | extern struct vm_operations_struct hugetlb_vm_ops; |
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| 100 | struct file *hugetlb_zero_setup(size_t); |
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| 101 | int hugetlb_get_quota(struct address_space *mapping); |
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| 102 | void hugetlb_put_quota(struct address_space *mapping); |
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| 103 | |||
| 104 | static inline int is_file_hugepages(struct file *file) |
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| 105 | { |
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| 106 | return file->f_op == &hugetlbfs_file_operations; |
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| 107 | } |
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| 108 | |||
| 109 | static inline void set_file_hugepages(struct file *file) |
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| 110 | { |
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| 111 | file->f_op = &hugetlbfs_file_operations; |
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| 112 | } |
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| 113 | #else /* !CONFIG_HUGETLBFS */ |
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| 114 | |||
| 115 | #define is_file_hugepages(file) 0 |
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| 116 | #define set_file_hugepages(file) BUG() |
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| 117 | #define hugetlb_zero_setup(size) ERR_PTR(-ENOSYS) |
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| 118 | |||
| 119 | #endif /* !CONFIG_HUGETLBFS */ |
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| 120 | |||
| 121 | #endif /* _LINUX_HUGETLB_H */ |