Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | #ifndef _LINUX_HUGETLB_H |
2 | #define _LINUX_HUGETLB_H | |
3 | ||
be93d8cf | 4 | #include <linux/mm_types.h> |
309381fe | 5 | #include <linux/mmdebug.h> |
4e950f6f | 6 | #include <linux/fs.h> |
8edf344c | 7 | #include <linux/hugetlb_inline.h> |
abb8206c | 8 | #include <linux/cgroup.h> |
9119a41e JK |
9 | #include <linux/list.h> |
10 | #include <linux/kref.h> | |
4e950f6f | 11 | |
e9ea0e2d AM |
12 | struct ctl_table; |
13 | struct user_struct; | |
24669e58 | 14 | struct mmu_gather; |
e9ea0e2d | 15 | |
1da177e4 LT |
16 | #ifdef CONFIG_HUGETLB_PAGE |
17 | ||
18 | #include <linux/mempolicy.h> | |
516dffdc | 19 | #include <linux/shm.h> |
63551ae0 | 20 | #include <asm/tlbflush.h> |
1da177e4 | 21 | |
90481622 DG |
22 | struct hugepage_subpool { |
23 | spinlock_t lock; | |
24 | long count; | |
25 | long max_hpages, used_hpages; | |
26 | }; | |
27 | ||
9119a41e JK |
28 | struct resv_map { |
29 | struct kref refs; | |
7b24d861 | 30 | spinlock_t lock; |
9119a41e JK |
31 | struct list_head regions; |
32 | }; | |
33 | extern struct resv_map *resv_map_alloc(void); | |
34 | void resv_map_release(struct kref *ref); | |
35 | ||
c3f38a38 AK |
36 | extern spinlock_t hugetlb_lock; |
37 | extern int hugetlb_max_hstate __read_mostly; | |
38 | #define for_each_hstate(h) \ | |
39 | for ((h) = hstates; (h) < &hstates[hugetlb_max_hstate]; (h)++) | |
40 | ||
90481622 DG |
41 | struct hugepage_subpool *hugepage_new_subpool(long nr_blocks); |
42 | void hugepage_put_subpool(struct hugepage_subpool *spool); | |
43 | ||
20a0307c WF |
44 | int PageHuge(struct page *page); |
45 | ||
a1e78772 | 46 | void reset_vma_resv_huge_pages(struct vm_area_struct *vma); |
8d65af78 AD |
47 | int hugetlb_sysctl_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *); |
48 | int hugetlb_overcommit_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *); | |
49 | int hugetlb_treat_movable_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *); | |
06808b08 LS |
50 | |
51 | #ifdef CONFIG_NUMA | |
52 | int hugetlb_mempolicy_sysctl_handler(struct ctl_table *, int, | |
53 | void __user *, size_t *, loff_t *); | |
54 | #endif | |
55 | ||
1da177e4 | 56 | int copy_hugetlb_page_range(struct mm_struct *, struct mm_struct *, struct vm_area_struct *); |
28a35716 ML |
57 | long follow_hugetlb_page(struct mm_struct *, struct vm_area_struct *, |
58 | struct page **, struct vm_area_struct **, | |
59 | unsigned long *, unsigned long *, long, unsigned int); | |
04f2cbe3 | 60 | void unmap_hugepage_range(struct vm_area_struct *, |
24669e58 | 61 | unsigned long, unsigned long, struct page *); |
d833352a MG |
62 | void __unmap_hugepage_range_final(struct mmu_gather *tlb, |
63 | struct vm_area_struct *vma, | |
64 | unsigned long start, unsigned long end, | |
65 | struct page *ref_page); | |
24669e58 AK |
66 | void __unmap_hugepage_range(struct mmu_gather *tlb, struct vm_area_struct *vma, |
67 | unsigned long start, unsigned long end, | |
68 | struct page *ref_page); | |
e1759c21 | 69 | void hugetlb_report_meminfo(struct seq_file *); |
1da177e4 | 70 | int hugetlb_report_node_meminfo(int, char *); |
949f7ec5 | 71 | void hugetlb_show_meminfo(void); |
1da177e4 | 72 | unsigned long hugetlb_total_pages(void); |
ac9b9c66 | 73 | int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma, |
788c7df4 | 74 | unsigned long address, unsigned int flags); |
a1e78772 | 75 | int hugetlb_reserve_pages(struct inode *inode, long from, long to, |
5a6fe125 | 76 | struct vm_area_struct *vma, |
ca16d140 | 77 | vm_flags_t vm_flags); |
a43a8c39 | 78 | void hugetlb_unreserve_pages(struct inode *inode, long offset, long freed); |
6de2b1aa | 79 | int dequeue_hwpoisoned_huge_page(struct page *page); |
31caf665 NH |
80 | bool isolate_huge_page(struct page *page, struct list_head *list); |
81 | void putback_active_hugepage(struct page *page); | |
c8721bbb | 82 | bool is_hugepage_active(struct page *page); |
8f1d26d0 | 83 | void free_huge_page(struct page *page); |
1da177e4 | 84 | |
3212b535 SC |
85 | #ifdef CONFIG_ARCH_WANT_HUGE_PMD_SHARE |
86 | pte_t *huge_pmd_share(struct mm_struct *mm, unsigned long addr, pud_t *pud); | |
87 | #endif | |
88 | ||
753162cd | 89 | extern int hugepages_treat_as_movable; |
1da177e4 | 90 | extern int sysctl_hugetlb_shm_group; |
53ba51d2 | 91 | extern struct list_head huge_boot_pages; |
1da177e4 | 92 | |
63551ae0 DG |
93 | /* arch callbacks */ |
94 | ||
a5516438 AK |
95 | pte_t *huge_pte_alloc(struct mm_struct *mm, |
96 | unsigned long addr, unsigned long sz); | |
63551ae0 | 97 | pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr); |
39dde65c | 98 | int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep); |
63551ae0 DG |
99 | struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address, |
100 | int write); | |
101 | struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address, | |
102 | pmd_t *pmd, int write); | |
ceb86879 AK |
103 | struct page *follow_huge_pud(struct mm_struct *mm, unsigned long address, |
104 | pud_t *pud, int write); | |
63551ae0 | 105 | int pmd_huge(pmd_t pmd); |
ceb86879 | 106 | int pud_huge(pud_t pmd); |
7da4d641 | 107 | unsigned long hugetlb_change_protection(struct vm_area_struct *vma, |
8f860591 | 108 | unsigned long address, unsigned long end, pgprot_t newprot); |
63551ae0 | 109 | |
1da177e4 LT |
110 | #else /* !CONFIG_HUGETLB_PAGE */ |
111 | ||
20a0307c WF |
112 | static inline int PageHuge(struct page *page) |
113 | { | |
114 | return 0; | |
115 | } | |
116 | ||
a1e78772 MG |
117 | static inline void reset_vma_resv_huge_pages(struct vm_area_struct *vma) |
118 | { | |
119 | } | |
120 | ||
1da177e4 LT |
121 | static inline unsigned long hugetlb_total_pages(void) |
122 | { | |
123 | return 0; | |
124 | } | |
125 | ||
5b23dbe8 | 126 | #define follow_hugetlb_page(m,v,p,vs,a,b,i,w) ({ BUG(); 0; }) |
1da177e4 LT |
127 | #define follow_huge_addr(mm, addr, write) ERR_PTR(-EINVAL) |
128 | #define copy_hugetlb_page_range(src, dst, vma) ({ BUG(); 0; }) | |
e1759c21 AD |
129 | static inline void hugetlb_report_meminfo(struct seq_file *m) |
130 | { | |
131 | } | |
1da177e4 | 132 | #define hugetlb_report_node_meminfo(n, buf) 0 |
949f7ec5 DR |
133 | static inline void hugetlb_show_meminfo(void) |
134 | { | |
135 | } | |
1da177e4 | 136 | #define follow_huge_pmd(mm, addr, pmd, write) NULL |
ceb86879 | 137 | #define follow_huge_pud(mm, addr, pud, write) NULL |
a5516438 | 138 | #define prepare_hugepage_range(file, addr, len) (-EINVAL) |
1da177e4 | 139 | #define pmd_huge(x) 0 |
ceb86879 | 140 | #define pud_huge(x) 0 |
1da177e4 | 141 | #define is_hugepage_only_range(mm, addr, len) 0 |
9da61aef | 142 | #define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) ({BUG(); 0; }) |
788c7df4 | 143 | #define hugetlb_fault(mm, vma, addr, flags) ({ BUG(); 0; }) |
0fe6e20b | 144 | #define huge_pte_offset(mm, address) 0 |
24669e58 AK |
145 | static inline int dequeue_hwpoisoned_huge_page(struct page *page) |
146 | { | |
147 | return 0; | |
148 | } | |
149 | ||
f40386a4 NH |
150 | static inline bool isolate_huge_page(struct page *page, struct list_head *list) |
151 | { | |
152 | return false; | |
153 | } | |
31caf665 | 154 | #define putback_active_hugepage(p) do {} while (0) |
c8721bbb | 155 | #define is_hugepage_active(x) false |
1da177e4 | 156 | |
7da4d641 PZ |
157 | static inline unsigned long hugetlb_change_protection(struct vm_area_struct *vma, |
158 | unsigned long address, unsigned long end, pgprot_t newprot) | |
159 | { | |
160 | return 0; | |
161 | } | |
8f860591 | 162 | |
d833352a MG |
163 | static inline void __unmap_hugepage_range_final(struct mmu_gather *tlb, |
164 | struct vm_area_struct *vma, unsigned long start, | |
165 | unsigned long end, struct page *ref_page) | |
166 | { | |
167 | BUG(); | |
168 | } | |
169 | ||
24669e58 AK |
170 | static inline void __unmap_hugepage_range(struct mmu_gather *tlb, |
171 | struct vm_area_struct *vma, unsigned long start, | |
172 | unsigned long end, struct page *ref_page) | |
173 | { | |
174 | BUG(); | |
175 | } | |
176 | ||
1da177e4 | 177 | #endif /* !CONFIG_HUGETLB_PAGE */ |
f30c59e9 AK |
178 | /* |
179 | * hugepages at page global directory. If arch support | |
180 | * hugepages at pgd level, they need to define this. | |
181 | */ | |
182 | #ifndef pgd_huge | |
183 | #define pgd_huge(x) 0 | |
184 | #endif | |
185 | ||
186 | #ifndef pgd_write | |
187 | static inline int pgd_write(pgd_t pgd) | |
188 | { | |
189 | BUG(); | |
190 | return 0; | |
191 | } | |
192 | #endif | |
193 | ||
194 | #ifndef pud_write | |
195 | static inline int pud_write(pud_t pud) | |
196 | { | |
197 | BUG(); | |
198 | return 0; | |
199 | } | |
200 | #endif | |
201 | ||
202 | #ifndef is_hugepd | |
203 | /* | |
204 | * Some architectures requires a hugepage directory format that is | |
205 | * required to support multiple hugepage sizes. For example | |
206 | * a4fe3ce76 "powerpc/mm: Allow more flexible layouts for hugepage pagetables" | |
207 | * introduced the same on powerpc. This allows for a more flexible hugepage | |
208 | * pagetable layout. | |
209 | */ | |
210 | typedef struct { unsigned long pd; } hugepd_t; | |
211 | #define is_hugepd(hugepd) (0) | |
212 | #define __hugepd(x) ((hugepd_t) { (x) }) | |
213 | static inline int gup_huge_pd(hugepd_t hugepd, unsigned long addr, | |
214 | unsigned pdshift, unsigned long end, | |
215 | int write, struct page **pages, int *nr) | |
216 | { | |
217 | return 0; | |
218 | } | |
219 | #else | |
220 | extern int gup_huge_pd(hugepd_t hugepd, unsigned long addr, | |
221 | unsigned pdshift, unsigned long end, | |
222 | int write, struct page **pages, int *nr); | |
223 | #endif | |
1da177e4 | 224 | |
4e52780d EM |
225 | #define HUGETLB_ANON_FILE "anon_hugepage" |
226 | ||
6bfde05b EM |
227 | enum { |
228 | /* | |
229 | * The file will be used as an shm file so shmfs accounting rules | |
230 | * apply | |
231 | */ | |
232 | HUGETLB_SHMFS_INODE = 1, | |
4e52780d EM |
233 | /* |
234 | * The file is being created on the internal vfs mount and shmfs | |
235 | * accounting rules do not apply | |
236 | */ | |
237 | HUGETLB_ANONHUGE_INODE = 2, | |
6bfde05b EM |
238 | }; |
239 | ||
1da177e4 | 240 | #ifdef CONFIG_HUGETLBFS |
1da177e4 | 241 | struct hugetlbfs_sb_info { |
1da177e4 LT |
242 | long max_inodes; /* inodes allowed */ |
243 | long free_inodes; /* inodes free */ | |
244 | spinlock_t stat_lock; | |
a137e1cc | 245 | struct hstate *hstate; |
90481622 | 246 | struct hugepage_subpool *spool; |
1da177e4 LT |
247 | }; |
248 | ||
1da177e4 LT |
249 | static inline struct hugetlbfs_sb_info *HUGETLBFS_SB(struct super_block *sb) |
250 | { | |
251 | return sb->s_fs_info; | |
252 | } | |
253 | ||
4b6f5d20 | 254 | extern const struct file_operations hugetlbfs_file_operations; |
f0f37e2f | 255 | extern const struct vm_operations_struct hugetlb_vm_ops; |
af73e4d9 | 256 | struct file *hugetlb_file_setup(const char *name, size_t size, vm_flags_t acct, |
42d7395f AK |
257 | struct user_struct **user, int creat_flags, |
258 | int page_size_log); | |
1da177e4 LT |
259 | |
260 | static inline int is_file_hugepages(struct file *file) | |
261 | { | |
516dffdc AL |
262 | if (file->f_op == &hugetlbfs_file_operations) |
263 | return 1; | |
264 | if (is_file_shm_hugepages(file)) | |
265 | return 1; | |
266 | ||
267 | return 0; | |
1da177e4 LT |
268 | } |
269 | ||
42d7395f | 270 | |
1da177e4 LT |
271 | #else /* !CONFIG_HUGETLBFS */ |
272 | ||
1db8508c | 273 | #define is_file_hugepages(file) 0 |
40716e29 | 274 | static inline struct file * |
af73e4d9 NH |
275 | hugetlb_file_setup(const char *name, size_t size, vm_flags_t acctflag, |
276 | struct user_struct **user, int creat_flags, | |
42d7395f | 277 | int page_size_log) |
e9ea0e2d AM |
278 | { |
279 | return ERR_PTR(-ENOSYS); | |
280 | } | |
1da177e4 LT |
281 | |
282 | #endif /* !CONFIG_HUGETLBFS */ | |
283 | ||
d2ba27e8 AB |
284 | #ifdef HAVE_ARCH_HUGETLB_UNMAPPED_AREA |
285 | unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr, | |
286 | unsigned long len, unsigned long pgoff, | |
287 | unsigned long flags); | |
288 | #endif /* HAVE_ARCH_HUGETLB_UNMAPPED_AREA */ | |
289 | ||
a5516438 AK |
290 | #ifdef CONFIG_HUGETLB_PAGE |
291 | ||
a3437870 | 292 | #define HSTATE_NAME_LEN 32 |
a5516438 AK |
293 | /* Defines one hugetlb page size */ |
294 | struct hstate { | |
e8c5c824 LS |
295 | int next_nid_to_alloc; |
296 | int next_nid_to_free; | |
a5516438 AK |
297 | unsigned int order; |
298 | unsigned long mask; | |
299 | unsigned long max_huge_pages; | |
300 | unsigned long nr_huge_pages; | |
301 | unsigned long free_huge_pages; | |
302 | unsigned long resv_huge_pages; | |
303 | unsigned long surplus_huge_pages; | |
304 | unsigned long nr_overcommit_huge_pages; | |
0edaecfa | 305 | struct list_head hugepage_activelist; |
a5516438 AK |
306 | struct list_head hugepage_freelists[MAX_NUMNODES]; |
307 | unsigned int nr_huge_pages_node[MAX_NUMNODES]; | |
308 | unsigned int free_huge_pages_node[MAX_NUMNODES]; | |
309 | unsigned int surplus_huge_pages_node[MAX_NUMNODES]; | |
abb8206c AK |
310 | #ifdef CONFIG_CGROUP_HUGETLB |
311 | /* cgroup control files */ | |
312 | struct cftype cgroup_files[5]; | |
313 | #endif | |
a3437870 | 314 | char name[HSTATE_NAME_LEN]; |
a5516438 AK |
315 | }; |
316 | ||
53ba51d2 JT |
317 | struct huge_bootmem_page { |
318 | struct list_head list; | |
319 | struct hstate *hstate; | |
ee8f248d BB |
320 | #ifdef CONFIG_HIGHMEM |
321 | phys_addr_t phys; | |
322 | #endif | |
53ba51d2 JT |
323 | }; |
324 | ||
bf50bab2 | 325 | struct page *alloc_huge_page_node(struct hstate *h, int nid); |
74060e4d NH |
326 | struct page *alloc_huge_page_noerr(struct vm_area_struct *vma, |
327 | unsigned long addr, int avoid_reserve); | |
bf50bab2 | 328 | |
53ba51d2 JT |
329 | /* arch callback */ |
330 | int __init alloc_bootmem_huge_page(struct hstate *h); | |
331 | ||
e5ff2159 AK |
332 | void __init hugetlb_add_hstate(unsigned order); |
333 | struct hstate *size_to_hstate(unsigned long size); | |
334 | ||
335 | #ifndef HUGE_MAX_HSTATE | |
336 | #define HUGE_MAX_HSTATE 1 | |
337 | #endif | |
338 | ||
339 | extern struct hstate hstates[HUGE_MAX_HSTATE]; | |
340 | extern unsigned int default_hstate_idx; | |
341 | ||
342 | #define default_hstate (hstates[default_hstate_idx]) | |
a5516438 | 343 | |
a137e1cc | 344 | static inline struct hstate *hstate_inode(struct inode *i) |
a5516438 | 345 | { |
a137e1cc AK |
346 | struct hugetlbfs_sb_info *hsb; |
347 | hsb = HUGETLBFS_SB(i->i_sb); | |
348 | return hsb->hstate; | |
a5516438 AK |
349 | } |
350 | ||
351 | static inline struct hstate *hstate_file(struct file *f) | |
352 | { | |
496ad9aa | 353 | return hstate_inode(file_inode(f)); |
a5516438 AK |
354 | } |
355 | ||
af73e4d9 NH |
356 | static inline struct hstate *hstate_sizelog(int page_size_log) |
357 | { | |
358 | if (!page_size_log) | |
359 | return &default_hstate; | |
97ad2be1 SL |
360 | |
361 | return size_to_hstate(1UL << page_size_log); | |
af73e4d9 NH |
362 | } |
363 | ||
a137e1cc | 364 | static inline struct hstate *hstate_vma(struct vm_area_struct *vma) |
a5516438 | 365 | { |
a137e1cc | 366 | return hstate_file(vma->vm_file); |
a5516438 AK |
367 | } |
368 | ||
369 | static inline unsigned long huge_page_size(struct hstate *h) | |
370 | { | |
371 | return (unsigned long)PAGE_SIZE << h->order; | |
372 | } | |
373 | ||
08fba699 MG |
374 | extern unsigned long vma_kernel_pagesize(struct vm_area_struct *vma); |
375 | ||
3340289d MG |
376 | extern unsigned long vma_mmu_pagesize(struct vm_area_struct *vma); |
377 | ||
a5516438 AK |
378 | static inline unsigned long huge_page_mask(struct hstate *h) |
379 | { | |
380 | return h->mask; | |
381 | } | |
382 | ||
383 | static inline unsigned int huge_page_order(struct hstate *h) | |
384 | { | |
385 | return h->order; | |
386 | } | |
387 | ||
388 | static inline unsigned huge_page_shift(struct hstate *h) | |
389 | { | |
390 | return h->order + PAGE_SHIFT; | |
391 | } | |
392 | ||
bae7f4ae LC |
393 | static inline bool hstate_is_gigantic(struct hstate *h) |
394 | { | |
395 | return huge_page_order(h) >= MAX_ORDER; | |
396 | } | |
397 | ||
a5516438 AK |
398 | static inline unsigned int pages_per_huge_page(struct hstate *h) |
399 | { | |
400 | return 1 << h->order; | |
401 | } | |
402 | ||
403 | static inline unsigned int blocks_per_huge_page(struct hstate *h) | |
404 | { | |
405 | return huge_page_size(h) / 512; | |
406 | } | |
407 | ||
408 | #include <asm/hugetlb.h> | |
409 | ||
d9ed9faa CM |
410 | #ifndef arch_make_huge_pte |
411 | static inline pte_t arch_make_huge_pte(pte_t entry, struct vm_area_struct *vma, | |
412 | struct page *page, int writable) | |
413 | { | |
414 | return entry; | |
415 | } | |
416 | #endif | |
417 | ||
e5ff2159 AK |
418 | static inline struct hstate *page_hstate(struct page *page) |
419 | { | |
309381fe | 420 | VM_BUG_ON_PAGE(!PageHuge(page), page); |
e5ff2159 AK |
421 | return size_to_hstate(PAGE_SIZE << compound_order(page)); |
422 | } | |
423 | ||
aa50d3a7 AK |
424 | static inline unsigned hstate_index_to_shift(unsigned index) |
425 | { | |
426 | return hstates[index].order + PAGE_SHIFT; | |
427 | } | |
428 | ||
972dc4de AK |
429 | static inline int hstate_index(struct hstate *h) |
430 | { | |
431 | return h - hstates; | |
432 | } | |
433 | ||
13d60f4b ZY |
434 | pgoff_t __basepage_index(struct page *page); |
435 | ||
436 | /* Return page->index in PAGE_SIZE units */ | |
437 | static inline pgoff_t basepage_index(struct page *page) | |
438 | { | |
439 | if (!PageCompound(page)) | |
440 | return page->index; | |
441 | ||
442 | return __basepage_index(page); | |
443 | } | |
444 | ||
c8721bbb NH |
445 | extern void dissolve_free_huge_pages(unsigned long start_pfn, |
446 | unsigned long end_pfn); | |
100873d7 | 447 | static inline int hugepage_migration_supported(struct hstate *h) |
83467efb | 448 | { |
c177c81e NH |
449 | #ifdef CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION |
450 | return huge_page_shift(h) == PMD_SHIFT; | |
451 | #else | |
452 | return 0; | |
453 | #endif | |
83467efb | 454 | } |
c8721bbb | 455 | |
cb900f41 KS |
456 | static inline spinlock_t *huge_pte_lockptr(struct hstate *h, |
457 | struct mm_struct *mm, pte_t *pte) | |
458 | { | |
459 | if (huge_page_size(h) == PMD_SIZE) | |
460 | return pmd_lockptr(mm, (pmd_t *) pte); | |
461 | VM_BUG_ON(huge_page_size(h) == PAGE_SIZE); | |
462 | return &mm->page_table_lock; | |
463 | } | |
464 | ||
457c1b27 NA |
465 | static inline bool hugepages_supported(void) |
466 | { | |
467 | /* | |
468 | * Some platform decide whether they support huge pages at boot | |
469 | * time. On these, such as powerpc, HPAGE_SHIFT is set to 0 when | |
470 | * there is no such support | |
471 | */ | |
472 | return HPAGE_SHIFT != 0; | |
473 | } | |
474 | ||
af73e4d9 | 475 | #else /* CONFIG_HUGETLB_PAGE */ |
a5516438 | 476 | struct hstate {}; |
bf50bab2 | 477 | #define alloc_huge_page_node(h, nid) NULL |
74060e4d | 478 | #define alloc_huge_page_noerr(v, a, r) NULL |
53ba51d2 | 479 | #define alloc_bootmem_huge_page(h) NULL |
a5516438 | 480 | #define hstate_file(f) NULL |
af73e4d9 | 481 | #define hstate_sizelog(s) NULL |
a5516438 AK |
482 | #define hstate_vma(v) NULL |
483 | #define hstate_inode(i) NULL | |
cb900f41 | 484 | #define page_hstate(page) NULL |
a5516438 AK |
485 | #define huge_page_size(h) PAGE_SIZE |
486 | #define huge_page_mask(h) PAGE_MASK | |
08fba699 | 487 | #define vma_kernel_pagesize(v) PAGE_SIZE |
3340289d | 488 | #define vma_mmu_pagesize(v) PAGE_SIZE |
a5516438 AK |
489 | #define huge_page_order(h) 0 |
490 | #define huge_page_shift(h) PAGE_SHIFT | |
510a35d4 AR |
491 | static inline unsigned int pages_per_huge_page(struct hstate *h) |
492 | { | |
493 | return 1; | |
494 | } | |
aa50d3a7 | 495 | #define hstate_index_to_shift(index) 0 |
972dc4de | 496 | #define hstate_index(h) 0 |
13d60f4b ZY |
497 | |
498 | static inline pgoff_t basepage_index(struct page *page) | |
499 | { | |
500 | return page->index; | |
501 | } | |
c8721bbb | 502 | #define dissolve_free_huge_pages(s, e) do {} while (0) |
100873d7 | 503 | #define hugepage_migration_supported(h) 0 |
cb900f41 KS |
504 | |
505 | static inline spinlock_t *huge_pte_lockptr(struct hstate *h, | |
506 | struct mm_struct *mm, pte_t *pte) | |
507 | { | |
508 | return &mm->page_table_lock; | |
509 | } | |
af73e4d9 | 510 | #endif /* CONFIG_HUGETLB_PAGE */ |
a5516438 | 511 | |
cb900f41 KS |
512 | static inline spinlock_t *huge_pte_lock(struct hstate *h, |
513 | struct mm_struct *mm, pte_t *pte) | |
514 | { | |
515 | spinlock_t *ptl; | |
516 | ||
517 | ptl = huge_pte_lockptr(h, mm, pte); | |
518 | spin_lock(ptl); | |
519 | return ptl; | |
520 | } | |
521 | ||
1da177e4 | 522 | #endif /* _LINUX_HUGETLB_H */ |