]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | #ifndef _LINUX_HUGETLB_H |
2 | #define _LINUX_HUGETLB_H | |
3 | ||
4 | #ifdef CONFIG_HUGETLB_PAGE | |
5 | ||
6 | #include <linux/mempolicy.h> | |
7 | ||
8 | struct ctl_table; | |
9 | ||
10 | static inline int is_vm_hugetlb_page(struct vm_area_struct *vma) | |
11 | { | |
12 | return vma->vm_flags & VM_HUGETLB; | |
13 | } | |
14 | ||
15 | int hugetlb_sysctl_handler(struct ctl_table *, int, struct file *, void __user *, size_t *, loff_t *); | |
16 | int copy_hugetlb_page_range(struct mm_struct *, struct mm_struct *, struct vm_area_struct *); | |
17 | int follow_hugetlb_page(struct mm_struct *, struct vm_area_struct *, struct page **, struct vm_area_struct **, unsigned long *, int *, int); | |
18 | void zap_hugepage_range(struct vm_area_struct *, unsigned long, unsigned long); | |
19 | void unmap_hugepage_range(struct vm_area_struct *, unsigned long, unsigned long); | |
20 | int hugetlb_prefault(struct address_space *, struct vm_area_struct *); | |
21 | int hugetlb_report_meminfo(char *); | |
22 | int hugetlb_report_node_meminfo(int, char *); | |
23 | int is_hugepage_mem_enough(size_t); | |
24 | unsigned long hugetlb_total_pages(void); | |
25 | struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address, | |
26 | int write); | |
27 | struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address, | |
28 | pmd_t *pmd, int write); | |
29 | int is_aligned_hugepage_range(unsigned long addr, unsigned long len); | |
30 | int pmd_huge(pmd_t pmd); | |
31 | struct page *alloc_huge_page(void); | |
32 | void free_huge_page(struct page *); | |
33 | ||
34 | extern unsigned long max_huge_pages; | |
35 | extern const unsigned long hugetlb_zero, hugetlb_infinity; | |
36 | extern int sysctl_hugetlb_shm_group; | |
37 | ||
38 | #ifndef ARCH_HAS_HUGEPAGE_ONLY_RANGE | |
39 | #define is_hugepage_only_range(mm, addr, len) 0 | |
3bf5ee95 HD |
40 | #define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) \ |
41 | do { } while (0) | |
1da177e4 LT |
42 | #endif |
43 | ||
44 | #ifndef ARCH_HAS_PREPARE_HUGEPAGE_RANGE | |
45 | #define prepare_hugepage_range(addr, len) \ | |
46 | is_aligned_hugepage_range(addr, len) | |
47 | #else | |
48 | int prepare_hugepage_range(unsigned long addr, unsigned long len); | |
49 | #endif | |
50 | ||
51 | #else /* !CONFIG_HUGETLB_PAGE */ | |
52 | ||
53 | static inline int is_vm_hugetlb_page(struct vm_area_struct *vma) | |
54 | { | |
55 | return 0; | |
56 | } | |
57 | static inline unsigned long hugetlb_total_pages(void) | |
58 | { | |
59 | return 0; | |
60 | } | |
61 | ||
62 | #define follow_hugetlb_page(m,v,p,vs,a,b,i) ({ BUG(); 0; }) | |
63 | #define follow_huge_addr(mm, addr, write) ERR_PTR(-EINVAL) | |
64 | #define copy_hugetlb_page_range(src, dst, vma) ({ BUG(); 0; }) | |
65 | #define hugetlb_prefault(mapping, vma) ({ BUG(); 0; }) | |
66 | #define zap_hugepage_range(vma, start, len) BUG() | |
67 | #define unmap_hugepage_range(vma, start, end) BUG() | |
68 | #define is_hugepage_mem_enough(size) 0 | |
69 | #define hugetlb_report_meminfo(buf) 0 | |
70 | #define hugetlb_report_node_meminfo(n, buf) 0 | |
71 | #define follow_huge_pmd(mm, addr, pmd, write) NULL | |
72 | #define is_aligned_hugepage_range(addr, len) 0 | |
73 | #define prepare_hugepage_range(addr, len) (-EINVAL) | |
74 | #define pmd_huge(x) 0 | |
75 | #define is_hugepage_only_range(mm, addr, len) 0 | |
3bf5ee95 HD |
76 | #define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) \ |
77 | do { } while (0) | |
1da177e4 LT |
78 | #define alloc_huge_page() ({ NULL; }) |
79 | #define free_huge_page(p) ({ (void)(p); BUG(); }) | |
80 | ||
81 | #ifndef HPAGE_MASK | |
82 | #define HPAGE_MASK 0 /* Keep the compiler happy */ | |
83 | #define HPAGE_SIZE 0 | |
84 | #endif | |
85 | ||
86 | #endif /* !CONFIG_HUGETLB_PAGE */ | |
87 | ||
88 | #ifdef CONFIG_HUGETLBFS | |
89 | struct hugetlbfs_config { | |
90 | uid_t uid; | |
91 | gid_t gid; | |
92 | umode_t mode; | |
93 | long nr_blocks; | |
94 | long nr_inodes; | |
95 | }; | |
96 | ||
97 | struct hugetlbfs_sb_info { | |
98 | long max_blocks; /* blocks allowed */ | |
99 | long free_blocks; /* blocks free */ | |
100 | long max_inodes; /* inodes allowed */ | |
101 | long free_inodes; /* inodes free */ | |
102 | spinlock_t stat_lock; | |
103 | }; | |
104 | ||
105 | ||
106 | struct hugetlbfs_inode_info { | |
107 | struct shared_policy policy; | |
108 | struct inode vfs_inode; | |
109 | }; | |
110 | ||
111 | static inline struct hugetlbfs_inode_info *HUGETLBFS_I(struct inode *inode) | |
112 | { | |
113 | return container_of(inode, struct hugetlbfs_inode_info, vfs_inode); | |
114 | } | |
115 | ||
116 | static inline struct hugetlbfs_sb_info *HUGETLBFS_SB(struct super_block *sb) | |
117 | { | |
118 | return sb->s_fs_info; | |
119 | } | |
120 | ||
121 | extern struct file_operations hugetlbfs_file_operations; | |
122 | extern struct vm_operations_struct hugetlb_vm_ops; | |
123 | struct file *hugetlb_zero_setup(size_t); | |
124 | int hugetlb_get_quota(struct address_space *mapping); | |
125 | void hugetlb_put_quota(struct address_space *mapping); | |
126 | ||
127 | static inline int is_file_hugepages(struct file *file) | |
128 | { | |
129 | return file->f_op == &hugetlbfs_file_operations; | |
130 | } | |
131 | ||
132 | static inline void set_file_hugepages(struct file *file) | |
133 | { | |
134 | file->f_op = &hugetlbfs_file_operations; | |
135 | } | |
136 | #else /* !CONFIG_HUGETLBFS */ | |
137 | ||
138 | #define is_file_hugepages(file) 0 | |
139 | #define set_file_hugepages(file) BUG() | |
140 | #define hugetlb_zero_setup(size) ERR_PTR(-ENOSYS) | |
141 | ||
142 | #endif /* !CONFIG_HUGETLBFS */ | |
143 | ||
144 | #endif /* _LINUX_HUGETLB_H */ |