Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #ifndef _LINUX_HUGETLB_H |
| 2 | #define _LINUX_HUGETLB_H |
| 3 | |
Alexey Dobriyan | 4e950f6 | 2007-07-30 02:36:13 +0400 | [diff] [blame] | 4 | #include <linux/fs.h> |
| 5 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6 | #ifdef CONFIG_HUGETLB_PAGE |
| 7 | |
| 8 | #include <linux/mempolicy.h> |
Adam Litke | 516dffd | 2007-03-01 15:46:08 -0800 | [diff] [blame] | 9 | #include <linux/shm.h> |
David Gibson | 63551ae | 2005-06-21 17:14:44 -0700 | [diff] [blame] | 10 | #include <asm/tlbflush.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | |
| 12 | struct ctl_table; |
Hugh Dickins | 353d5c3 | 2009-08-24 16:30:28 +0100 | [diff] [blame] | 13 | struct user_struct; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | |
Wu Fengguang | 20a0307 | 2009-06-16 15:32:22 -0700 | [diff] [blame] | 15 | int PageHuge(struct page *page); |
| 16 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | static inline int is_vm_hugetlb_page(struct vm_area_struct *vma) |
| 18 | { |
| 19 | return vma->vm_flags & VM_HUGETLB; |
| 20 | } |
| 21 | |
Mel Gorman | a1e7877 | 2008-07-23 21:27:23 -0700 | [diff] [blame] | 22 | void reset_vma_resv_huge_pages(struct vm_area_struct *vma); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | int hugetlb_sysctl_handler(struct ctl_table *, int, struct file *, void __user *, size_t *, loff_t *); |
Nishanth Aravamudan | a3d0c6a | 2008-02-08 04:18:18 -0800 | [diff] [blame] | 24 | int hugetlb_overcommit_handler(struct ctl_table *, int, struct file *, void __user *, size_t *, loff_t *); |
Mel Gorman | 396faf0 | 2007-07-17 04:03:13 -0700 | [diff] [blame] | 25 | int hugetlb_treat_movable_handler(struct ctl_table *, int, struct file *, void __user *, size_t *, loff_t *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | int copy_hugetlb_page_range(struct mm_struct *, struct mm_struct *, struct vm_area_struct *); |
Hugh Dickins | 2a15efc | 2009-09-21 17:03:27 -0700 | [diff] [blame] | 27 | int follow_hugetlb_page(struct mm_struct *, struct vm_area_struct *, |
| 28 | struct page **, struct vm_area_struct **, |
| 29 | unsigned long *, int *, int, unsigned int flags); |
Mel Gorman | 04f2cbe | 2008-07-23 21:27:25 -0700 | [diff] [blame] | 30 | void unmap_hugepage_range(struct vm_area_struct *, |
| 31 | unsigned long, unsigned long, struct page *); |
| 32 | void __unmap_hugepage_range(struct vm_area_struct *, |
| 33 | unsigned long, unsigned long, struct page *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | int hugetlb_prefault(struct address_space *, struct vm_area_struct *); |
Alexey Dobriyan | e1759c2 | 2008-10-15 23:50:22 +0400 | [diff] [blame] | 35 | void hugetlb_report_meminfo(struct seq_file *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | int hugetlb_report_node_meminfo(int, char *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | unsigned long hugetlb_total_pages(void); |
Hugh Dickins | ac9b9c6 | 2005-10-20 16:24:28 +0100 | [diff] [blame] | 38 | int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma, |
Hugh Dickins | 788c7df | 2009-06-23 13:49:05 +0100 | [diff] [blame] | 39 | unsigned long address, unsigned int flags); |
Mel Gorman | a1e7877 | 2008-07-23 21:27:23 -0700 | [diff] [blame] | 40 | int hugetlb_reserve_pages(struct inode *inode, long from, long to, |
Mel Gorman | 5a6fe12 | 2009-02-10 14:02:27 +0000 | [diff] [blame] | 41 | struct vm_area_struct *vma, |
| 42 | int acctflags); |
Chen, Kenneth W | a43a8c3 | 2006-06-23 02:03:15 -0700 | [diff] [blame] | 43 | void hugetlb_unreserve_pages(struct inode *inode, long offset, long freed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | |
Mel Gorman | 396faf0 | 2007-07-17 04:03:13 -0700 | [diff] [blame] | 45 | extern unsigned long hugepages_treat_as_movable; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | extern const unsigned long hugetlb_zero, hugetlb_infinity; |
| 47 | extern int sysctl_hugetlb_shm_group; |
Jon Tollefson | 53ba51d | 2008-07-23 21:27:52 -0700 | [diff] [blame] | 48 | extern struct list_head huge_boot_pages; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | |
David Gibson | 63551ae | 2005-06-21 17:14:44 -0700 | [diff] [blame] | 50 | /* arch callbacks */ |
| 51 | |
Andi Kleen | a551643 | 2008-07-23 21:27:41 -0700 | [diff] [blame] | 52 | pte_t *huge_pte_alloc(struct mm_struct *mm, |
| 53 | unsigned long addr, unsigned long sz); |
David Gibson | 63551ae | 2005-06-21 17:14:44 -0700 | [diff] [blame] | 54 | pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr); |
Chen, Kenneth W | 39dde65 | 2006-12-06 20:32:03 -0800 | [diff] [blame] | 55 | int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep); |
David Gibson | 63551ae | 2005-06-21 17:14:44 -0700 | [diff] [blame] | 56 | struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address, |
| 57 | int write); |
| 58 | struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address, |
| 59 | pmd_t *pmd, int write); |
Andi Kleen | ceb8687 | 2008-07-23 21:27:50 -0700 | [diff] [blame] | 60 | struct page *follow_huge_pud(struct mm_struct *mm, unsigned long address, |
| 61 | pud_t *pud, int write); |
David Gibson | 63551ae | 2005-06-21 17:14:44 -0700 | [diff] [blame] | 62 | int pmd_huge(pmd_t pmd); |
Andi Kleen | ceb8687 | 2008-07-23 21:27:50 -0700 | [diff] [blame] | 63 | int pud_huge(pud_t pmd); |
Zhang, Yanmin | 8f86059 | 2006-03-22 00:08:50 -0800 | [diff] [blame] | 64 | void hugetlb_change_protection(struct vm_area_struct *vma, |
| 65 | unsigned long address, unsigned long end, pgprot_t newprot); |
David Gibson | 63551ae | 2005-06-21 17:14:44 -0700 | [diff] [blame] | 66 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | #else /* !CONFIG_HUGETLB_PAGE */ |
| 68 | |
Wu Fengguang | 20a0307 | 2009-06-16 15:32:22 -0700 | [diff] [blame] | 69 | static inline int PageHuge(struct page *page) |
| 70 | { |
| 71 | return 0; |
| 72 | } |
| 73 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | static inline int is_vm_hugetlb_page(struct vm_area_struct *vma) |
| 75 | { |
| 76 | return 0; |
| 77 | } |
Mel Gorman | a1e7877 | 2008-07-23 21:27:23 -0700 | [diff] [blame] | 78 | |
| 79 | static inline void reset_vma_resv_huge_pages(struct vm_area_struct *vma) |
| 80 | { |
| 81 | } |
| 82 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | static inline unsigned long hugetlb_total_pages(void) |
| 84 | { |
| 85 | return 0; |
| 86 | } |
| 87 | |
Adam Litke | 5b23dbe | 2007-11-14 16:59:33 -0800 | [diff] [blame] | 88 | #define follow_hugetlb_page(m,v,p,vs,a,b,i,w) ({ BUG(); 0; }) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | #define follow_huge_addr(mm, addr, write) ERR_PTR(-EINVAL) |
| 90 | #define copy_hugetlb_page_range(src, dst, vma) ({ BUG(); 0; }) |
| 91 | #define hugetlb_prefault(mapping, vma) ({ BUG(); 0; }) |
Mel Gorman | 04f2cbe | 2008-07-23 21:27:25 -0700 | [diff] [blame] | 92 | #define unmap_hugepage_range(vma, start, end, page) BUG() |
Alexey Dobriyan | e1759c2 | 2008-10-15 23:50:22 +0400 | [diff] [blame] | 93 | static inline void hugetlb_report_meminfo(struct seq_file *m) |
| 94 | { |
| 95 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | #define hugetlb_report_node_meminfo(n, buf) 0 |
| 97 | #define follow_huge_pmd(mm, addr, pmd, write) NULL |
Andi Kleen | ceb8687 | 2008-07-23 21:27:50 -0700 | [diff] [blame] | 98 | #define follow_huge_pud(mm, addr, pud, write) NULL |
Andi Kleen | a551643 | 2008-07-23 21:27:41 -0700 | [diff] [blame] | 99 | #define prepare_hugepage_range(file, addr, len) (-EINVAL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | #define pmd_huge(x) 0 |
Andi Kleen | ceb8687 | 2008-07-23 21:27:50 -0700 | [diff] [blame] | 101 | #define pud_huge(x) 0 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | #define is_hugepage_only_range(mm, addr, len) 0 |
David Gibson | 9da61ae | 2006-03-22 00:08:57 -0800 | [diff] [blame] | 103 | #define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) ({BUG(); 0; }) |
Hugh Dickins | 788c7df | 2009-06-23 13:49:05 +0100 | [diff] [blame] | 104 | #define hugetlb_fault(mm, vma, addr, flags) ({ BUG(); 0; }) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | |
Zhang, Yanmin | 8f86059 | 2006-03-22 00:08:50 -0800 | [diff] [blame] | 106 | #define hugetlb_change_protection(vma, address, end, newprot) |
| 107 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | #ifndef HPAGE_MASK |
Robin Holt | 51c6f66 | 2005-11-13 16:06:42 -0800 | [diff] [blame] | 109 | #define HPAGE_MASK PAGE_MASK /* Keep the compiler happy */ |
| 110 | #define HPAGE_SIZE PAGE_SIZE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | #endif |
| 112 | |
| 113 | #endif /* !CONFIG_HUGETLB_PAGE */ |
| 114 | |
Eric B Munson | 6bfde05 | 2009-09-21 17:03:43 -0700 | [diff] [blame^] | 115 | enum { |
| 116 | /* |
| 117 | * The file will be used as an shm file so shmfs accounting rules |
| 118 | * apply |
| 119 | */ |
| 120 | HUGETLB_SHMFS_INODE = 1, |
| 121 | }; |
| 122 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | #ifdef CONFIG_HUGETLBFS |
| 124 | struct hugetlbfs_config { |
| 125 | uid_t uid; |
| 126 | gid_t gid; |
| 127 | umode_t mode; |
| 128 | long nr_blocks; |
| 129 | long nr_inodes; |
Andi Kleen | a137e1c | 2008-07-23 21:27:43 -0700 | [diff] [blame] | 130 | struct hstate *hstate; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | }; |
| 132 | |
| 133 | struct hugetlbfs_sb_info { |
| 134 | long max_blocks; /* blocks allowed */ |
| 135 | long free_blocks; /* blocks free */ |
| 136 | long max_inodes; /* inodes allowed */ |
| 137 | long free_inodes; /* inodes free */ |
| 138 | spinlock_t stat_lock; |
Andi Kleen | a137e1c | 2008-07-23 21:27:43 -0700 | [diff] [blame] | 139 | struct hstate *hstate; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | }; |
| 141 | |
| 142 | |
| 143 | struct hugetlbfs_inode_info { |
| 144 | struct shared_policy policy; |
| 145 | struct inode vfs_inode; |
| 146 | }; |
| 147 | |
| 148 | static inline struct hugetlbfs_inode_info *HUGETLBFS_I(struct inode *inode) |
| 149 | { |
| 150 | return container_of(inode, struct hugetlbfs_inode_info, vfs_inode); |
| 151 | } |
| 152 | |
| 153 | static inline struct hugetlbfs_sb_info *HUGETLBFS_SB(struct super_block *sb) |
| 154 | { |
| 155 | return sb->s_fs_info; |
| 156 | } |
| 157 | |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 158 | extern const struct file_operations hugetlbfs_file_operations; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | extern struct vm_operations_struct hugetlb_vm_ops; |
Hugh Dickins | 353d5c3 | 2009-08-24 16:30:28 +0100 | [diff] [blame] | 160 | struct file *hugetlb_file_setup(const char *name, size_t size, int acct, |
Eric B Munson | 6bfde05 | 2009-09-21 17:03:43 -0700 | [diff] [blame^] | 161 | struct user_struct **user, int creat_flags); |
Adam Litke | 9a119c0 | 2007-11-14 16:59:41 -0800 | [diff] [blame] | 162 | int hugetlb_get_quota(struct address_space *mapping, long delta); |
| 163 | void hugetlb_put_quota(struct address_space *mapping, long delta); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | |
| 165 | static inline int is_file_hugepages(struct file *file) |
| 166 | { |
Adam Litke | 516dffd | 2007-03-01 15:46:08 -0800 | [diff] [blame] | 167 | if (file->f_op == &hugetlbfs_file_operations) |
| 168 | return 1; |
| 169 | if (is_file_shm_hugepages(file)) |
| 170 | return 1; |
| 171 | |
| 172 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | } |
| 174 | |
| 175 | static inline void set_file_hugepages(struct file *file) |
| 176 | { |
| 177 | file->f_op = &hugetlbfs_file_operations; |
| 178 | } |
| 179 | #else /* !CONFIG_HUGETLBFS */ |
| 180 | |
Stefan Richter | 1db8508 | 2009-02-10 23:27:32 +0100 | [diff] [blame] | 181 | #define is_file_hugepages(file) 0 |
| 182 | #define set_file_hugepages(file) BUG() |
Eric B Munson | 6bfde05 | 2009-09-21 17:03:43 -0700 | [diff] [blame^] | 183 | #define hugetlb_file_setup(name,size,acct,user,creat) ERR_PTR(-ENOSYS) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | |
| 185 | #endif /* !CONFIG_HUGETLBFS */ |
| 186 | |
Adrian Bunk | d2ba27e8 | 2007-05-06 14:49:00 -0700 | [diff] [blame] | 187 | #ifdef HAVE_ARCH_HUGETLB_UNMAPPED_AREA |
| 188 | unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr, |
| 189 | unsigned long len, unsigned long pgoff, |
| 190 | unsigned long flags); |
| 191 | #endif /* HAVE_ARCH_HUGETLB_UNMAPPED_AREA */ |
| 192 | |
Andi Kleen | a551643 | 2008-07-23 21:27:41 -0700 | [diff] [blame] | 193 | #ifdef CONFIG_HUGETLB_PAGE |
| 194 | |
Nishanth Aravamudan | a343787 | 2008-07-23 21:27:44 -0700 | [diff] [blame] | 195 | #define HSTATE_NAME_LEN 32 |
Andi Kleen | a551643 | 2008-07-23 21:27:41 -0700 | [diff] [blame] | 196 | /* Defines one hugetlb page size */ |
| 197 | struct hstate { |
Lee Schermerhorn | e8c5c82 | 2009-09-21 17:01:22 -0700 | [diff] [blame] | 198 | int next_nid_to_alloc; |
| 199 | int next_nid_to_free; |
Andi Kleen | a551643 | 2008-07-23 21:27:41 -0700 | [diff] [blame] | 200 | unsigned int order; |
| 201 | unsigned long mask; |
| 202 | unsigned long max_huge_pages; |
| 203 | unsigned long nr_huge_pages; |
| 204 | unsigned long free_huge_pages; |
| 205 | unsigned long resv_huge_pages; |
| 206 | unsigned long surplus_huge_pages; |
| 207 | unsigned long nr_overcommit_huge_pages; |
| 208 | struct list_head hugepage_freelists[MAX_NUMNODES]; |
| 209 | unsigned int nr_huge_pages_node[MAX_NUMNODES]; |
| 210 | unsigned int free_huge_pages_node[MAX_NUMNODES]; |
| 211 | unsigned int surplus_huge_pages_node[MAX_NUMNODES]; |
Nishanth Aravamudan | a343787 | 2008-07-23 21:27:44 -0700 | [diff] [blame] | 212 | char name[HSTATE_NAME_LEN]; |
Andi Kleen | a551643 | 2008-07-23 21:27:41 -0700 | [diff] [blame] | 213 | }; |
| 214 | |
Jon Tollefson | 53ba51d | 2008-07-23 21:27:52 -0700 | [diff] [blame] | 215 | struct huge_bootmem_page { |
| 216 | struct list_head list; |
| 217 | struct hstate *hstate; |
| 218 | }; |
| 219 | |
| 220 | /* arch callback */ |
| 221 | int __init alloc_bootmem_huge_page(struct hstate *h); |
| 222 | |
Andi Kleen | e5ff215 | 2008-07-23 21:27:42 -0700 | [diff] [blame] | 223 | void __init hugetlb_add_hstate(unsigned order); |
| 224 | struct hstate *size_to_hstate(unsigned long size); |
| 225 | |
| 226 | #ifndef HUGE_MAX_HSTATE |
| 227 | #define HUGE_MAX_HSTATE 1 |
| 228 | #endif |
| 229 | |
| 230 | extern struct hstate hstates[HUGE_MAX_HSTATE]; |
| 231 | extern unsigned int default_hstate_idx; |
| 232 | |
| 233 | #define default_hstate (hstates[default_hstate_idx]) |
Andi Kleen | a551643 | 2008-07-23 21:27:41 -0700 | [diff] [blame] | 234 | |
Andi Kleen | a137e1c | 2008-07-23 21:27:43 -0700 | [diff] [blame] | 235 | static inline struct hstate *hstate_inode(struct inode *i) |
Andi Kleen | a551643 | 2008-07-23 21:27:41 -0700 | [diff] [blame] | 236 | { |
Andi Kleen | a137e1c | 2008-07-23 21:27:43 -0700 | [diff] [blame] | 237 | struct hugetlbfs_sb_info *hsb; |
| 238 | hsb = HUGETLBFS_SB(i->i_sb); |
| 239 | return hsb->hstate; |
Andi Kleen | a551643 | 2008-07-23 21:27:41 -0700 | [diff] [blame] | 240 | } |
| 241 | |
| 242 | static inline struct hstate *hstate_file(struct file *f) |
| 243 | { |
Andi Kleen | a137e1c | 2008-07-23 21:27:43 -0700 | [diff] [blame] | 244 | return hstate_inode(f->f_dentry->d_inode); |
Andi Kleen | a551643 | 2008-07-23 21:27:41 -0700 | [diff] [blame] | 245 | } |
| 246 | |
Andi Kleen | a137e1c | 2008-07-23 21:27:43 -0700 | [diff] [blame] | 247 | static inline struct hstate *hstate_vma(struct vm_area_struct *vma) |
Andi Kleen | a551643 | 2008-07-23 21:27:41 -0700 | [diff] [blame] | 248 | { |
Andi Kleen | a137e1c | 2008-07-23 21:27:43 -0700 | [diff] [blame] | 249 | return hstate_file(vma->vm_file); |
Andi Kleen | a551643 | 2008-07-23 21:27:41 -0700 | [diff] [blame] | 250 | } |
| 251 | |
| 252 | static inline unsigned long huge_page_size(struct hstate *h) |
| 253 | { |
| 254 | return (unsigned long)PAGE_SIZE << h->order; |
| 255 | } |
| 256 | |
Mel Gorman | 08fba69 | 2009-01-06 14:38:53 -0800 | [diff] [blame] | 257 | extern unsigned long vma_kernel_pagesize(struct vm_area_struct *vma); |
| 258 | |
Mel Gorman | 3340289 | 2009-01-06 14:38:54 -0800 | [diff] [blame] | 259 | extern unsigned long vma_mmu_pagesize(struct vm_area_struct *vma); |
| 260 | |
Andi Kleen | a551643 | 2008-07-23 21:27:41 -0700 | [diff] [blame] | 261 | static inline unsigned long huge_page_mask(struct hstate *h) |
| 262 | { |
| 263 | return h->mask; |
| 264 | } |
| 265 | |
| 266 | static inline unsigned int huge_page_order(struct hstate *h) |
| 267 | { |
| 268 | return h->order; |
| 269 | } |
| 270 | |
| 271 | static inline unsigned huge_page_shift(struct hstate *h) |
| 272 | { |
| 273 | return h->order + PAGE_SHIFT; |
| 274 | } |
| 275 | |
| 276 | static inline unsigned int pages_per_huge_page(struct hstate *h) |
| 277 | { |
| 278 | return 1 << h->order; |
| 279 | } |
| 280 | |
| 281 | static inline unsigned int blocks_per_huge_page(struct hstate *h) |
| 282 | { |
| 283 | return huge_page_size(h) / 512; |
| 284 | } |
| 285 | |
| 286 | #include <asm/hugetlb.h> |
| 287 | |
Andi Kleen | e5ff215 | 2008-07-23 21:27:42 -0700 | [diff] [blame] | 288 | static inline struct hstate *page_hstate(struct page *page) |
| 289 | { |
| 290 | return size_to_hstate(PAGE_SIZE << compound_order(page)); |
| 291 | } |
| 292 | |
Andi Kleen | a551643 | 2008-07-23 21:27:41 -0700 | [diff] [blame] | 293 | #else |
| 294 | struct hstate {}; |
Jon Tollefson | 53ba51d | 2008-07-23 21:27:52 -0700 | [diff] [blame] | 295 | #define alloc_bootmem_huge_page(h) NULL |
Andi Kleen | a551643 | 2008-07-23 21:27:41 -0700 | [diff] [blame] | 296 | #define hstate_file(f) NULL |
| 297 | #define hstate_vma(v) NULL |
| 298 | #define hstate_inode(i) NULL |
| 299 | #define huge_page_size(h) PAGE_SIZE |
| 300 | #define huge_page_mask(h) PAGE_MASK |
Mel Gorman | 08fba69 | 2009-01-06 14:38:53 -0800 | [diff] [blame] | 301 | #define vma_kernel_pagesize(v) PAGE_SIZE |
Mel Gorman | 3340289 | 2009-01-06 14:38:54 -0800 | [diff] [blame] | 302 | #define vma_mmu_pagesize(v) PAGE_SIZE |
Andi Kleen | a551643 | 2008-07-23 21:27:41 -0700 | [diff] [blame] | 303 | #define huge_page_order(h) 0 |
| 304 | #define huge_page_shift(h) PAGE_SHIFT |
Andrea Righi | 510a35d | 2008-07-26 15:22:27 -0700 | [diff] [blame] | 305 | static inline unsigned int pages_per_huge_page(struct hstate *h) |
| 306 | { |
| 307 | return 1; |
| 308 | } |
Andi Kleen | a551643 | 2008-07-23 21:27:41 -0700 | [diff] [blame] | 309 | #endif |
| 310 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 311 | #endif /* _LINUX_HUGETLB_H */ |