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Commit | Line | Data |
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1da177e4 LT |
1 | #ifndef _LINUX_HUGETLB_H |
2 | #define _LINUX_HUGETLB_H | |
3 | ||
4e950f6f AD |
4 | #include <linux/fs.h> |
5 | ||
1da177e4 LT |
6 | #ifdef CONFIG_HUGETLB_PAGE |
7 | ||
8 | #include <linux/mempolicy.h> | |
516dffdc | 9 | #include <linux/shm.h> |
63551ae0 | 10 | #include <asm/tlbflush.h> |
6d779079 | 11 | #include <asm/hugetlb.h> |
1da177e4 LT |
12 | |
13 | struct ctl_table; | |
14 | ||
15 | static inline int is_vm_hugetlb_page(struct vm_area_struct *vma) | |
16 | { | |
17 | return vma->vm_flags & VM_HUGETLB; | |
18 | } | |
19 | ||
a1e78772 | 20 | void reset_vma_resv_huge_pages(struct vm_area_struct *vma); |
1da177e4 | 21 | int hugetlb_sysctl_handler(struct ctl_table *, int, struct file *, void __user *, size_t *, loff_t *); |
a3d0c6aa | 22 | int hugetlb_overcommit_handler(struct ctl_table *, int, struct file *, void __user *, size_t *, loff_t *); |
396faf03 | 23 | int hugetlb_treat_movable_handler(struct ctl_table *, int, struct file *, void __user *, size_t *, loff_t *); |
1da177e4 | 24 | int copy_hugetlb_page_range(struct mm_struct *, struct mm_struct *, struct vm_area_struct *); |
5b23dbe8 | 25 | int follow_hugetlb_page(struct mm_struct *, struct vm_area_struct *, struct page **, struct vm_area_struct **, unsigned long *, int *, int, int); |
1da177e4 | 26 | void unmap_hugepage_range(struct vm_area_struct *, unsigned long, unsigned long); |
502717f4 | 27 | void __unmap_hugepage_range(struct vm_area_struct *, unsigned long, unsigned long); |
1da177e4 LT |
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 *); | |
1da177e4 | 31 | unsigned long hugetlb_total_pages(void); |
ac9b9c66 HD |
32 | int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma, |
33 | unsigned long address, int write_access); | |
a1e78772 MG |
34 | int hugetlb_reserve_pages(struct inode *inode, long from, long to, |
35 | struct vm_area_struct *vma); | |
a43a8c39 | 36 | void hugetlb_unreserve_pages(struct inode *inode, long offset, long freed); |
1da177e4 LT |
37 | |
38 | extern unsigned long max_huge_pages; | |
064d9efe | 39 | extern unsigned long sysctl_overcommit_huge_pages; |
396faf03 | 40 | extern unsigned long hugepages_treat_as_movable; |
1da177e4 LT |
41 | extern const unsigned long hugetlb_zero, hugetlb_infinity; |
42 | extern int sysctl_hugetlb_shm_group; | |
43 | ||
63551ae0 DG |
44 | /* arch callbacks */ |
45 | ||
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); | |
39dde65c | 48 | int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep); |
63551ae0 DG |
49 | struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address, |
50 | int write); | |
51 | struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address, | |
52 | pmd_t *pmd, int write); | |
63551ae0 | 53 | int pmd_huge(pmd_t pmd); |
8f860591 ZY |
54 | void hugetlb_change_protection(struct vm_area_struct *vma, |
55 | unsigned long address, unsigned long end, pgprot_t newprot); | |
63551ae0 | 56 | |
1da177e4 LT |
57 | #else /* !CONFIG_HUGETLB_PAGE */ |
58 | ||
59 | static inline int is_vm_hugetlb_page(struct vm_area_struct *vma) | |
60 | { | |
61 | return 0; | |
62 | } | |
a1e78772 MG |
63 | |
64 | static inline void reset_vma_resv_huge_pages(struct vm_area_struct *vma) | |
65 | { | |
66 | } | |
67 | ||
1da177e4 LT |
68 | static inline unsigned long hugetlb_total_pages(void) |
69 | { | |
70 | return 0; | |
71 | } | |
72 | ||
5b23dbe8 | 73 | #define follow_hugetlb_page(m,v,p,vs,a,b,i,w) ({ BUG(); 0; }) |
1da177e4 LT |
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; }) | |
1da177e4 | 77 | #define unmap_hugepage_range(vma, start, end) BUG() |
1da177e4 LT |
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 | |
dec4ad86 | 81 | #define prepare_hugepage_range(addr,len) (-EINVAL) |
1da177e4 LT |
82 | #define pmd_huge(x) 0 |
83 | #define is_hugepage_only_range(mm, addr, len) 0 | |
9da61aef | 84 | #define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) ({BUG(); 0; }) |
ac9b9c66 | 85 | #define hugetlb_fault(mm, vma, addr, write) ({ BUG(); 0; }) |
1da177e4 | 86 | |
8f860591 ZY |
87 | #define hugetlb_change_protection(vma, address, end, newprot) |
88 | ||
1da177e4 | 89 | #ifndef HPAGE_MASK |
51c6f666 RH |
90 | #define HPAGE_MASK PAGE_MASK /* Keep the compiler happy */ |
91 | #define HPAGE_SIZE PAGE_SIZE | |
1da177e4 LT |
92 | #endif |
93 | ||
94 | #endif /* !CONFIG_HUGETLB_PAGE */ | |
95 | ||
96 | #ifdef CONFIG_HUGETLBFS | |
97 | struct hugetlbfs_config { | |
98 | uid_t uid; | |
99 | gid_t gid; | |
100 | umode_t mode; | |
101 | long nr_blocks; | |
102 | long nr_inodes; | |
103 | }; | |
104 | ||
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; | |
111 | }; | |
112 | ||
113 | ||
114 | struct hugetlbfs_inode_info { | |
115 | struct shared_policy policy; | |
116 | struct inode vfs_inode; | |
117 | }; | |
118 | ||
119 | static inline struct hugetlbfs_inode_info *HUGETLBFS_I(struct inode *inode) | |
120 | { | |
121 | return container_of(inode, struct hugetlbfs_inode_info, vfs_inode); | |
122 | } | |
123 | ||
124 | static inline struct hugetlbfs_sb_info *HUGETLBFS_SB(struct super_block *sb) | |
125 | { | |
126 | return sb->s_fs_info; | |
127 | } | |
128 | ||
4b6f5d20 | 129 | extern const struct file_operations hugetlbfs_file_operations; |
1da177e4 | 130 | extern struct vm_operations_struct hugetlb_vm_ops; |
9d66586f | 131 | struct file *hugetlb_file_setup(const char *name, size_t); |
9a119c05 AL |
132 | int hugetlb_get_quota(struct address_space *mapping, long delta); |
133 | void hugetlb_put_quota(struct address_space *mapping, long delta); | |
1da177e4 | 134 | |
45c682a6 KC |
135 | #define BLOCKS_PER_HUGEPAGE (HPAGE_SIZE / 512) |
136 | ||
1da177e4 LT |
137 | static inline int is_file_hugepages(struct file *file) |
138 | { | |
516dffdc AL |
139 | if (file->f_op == &hugetlbfs_file_operations) |
140 | return 1; | |
141 | if (is_file_shm_hugepages(file)) | |
142 | return 1; | |
143 | ||
144 | return 0; | |
1da177e4 LT |
145 | } |
146 | ||
147 | static inline void set_file_hugepages(struct file *file) | |
148 | { | |
149 | file->f_op = &hugetlbfs_file_operations; | |
150 | } | |
151 | #else /* !CONFIG_HUGETLBFS */ | |
152 | ||
153 | #define is_file_hugepages(file) 0 | |
154 | #define set_file_hugepages(file) BUG() | |
9d66586f | 155 | #define hugetlb_file_setup(name,size) ERR_PTR(-ENOSYS) |
1da177e4 LT |
156 | |
157 | #endif /* !CONFIG_HUGETLBFS */ | |
158 | ||
d2ba27e8 AB |
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 */ | |
164 | ||
1da177e4 | 165 | #endif /* _LINUX_HUGETLB_H */ |