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; | |
c6a91820 MK |
25 | long max_hpages; /* Maximum huge pages or -1 if no maximum. */ |
26 | long used_hpages; /* Used count against maximum, includes */ | |
27 | /* both alloced and reserved pages. */ | |
28 | struct hstate *hstate; | |
29 | long min_hpages; /* Minimum huge pages or -1 if no minimum. */ | |
30 | long rsv_hpages; /* Pages reserved against global pool to */ | |
31 | /* sasitfy minimum size. */ | |
90481622 DG |
32 | }; |
33 | ||
9119a41e JK |
34 | struct resv_map { |
35 | struct kref refs; | |
7b24d861 | 36 | spinlock_t lock; |
9119a41e JK |
37 | struct list_head regions; |
38 | }; | |
39 | extern struct resv_map *resv_map_alloc(void); | |
40 | void resv_map_release(struct kref *ref); | |
41 | ||
c3f38a38 AK |
42 | extern spinlock_t hugetlb_lock; |
43 | extern int hugetlb_max_hstate __read_mostly; | |
44 | #define for_each_hstate(h) \ | |
45 | for ((h) = hstates; (h) < &hstates[hugetlb_max_hstate]; (h)++) | |
46 | ||
7ca02d0a MK |
47 | struct hugepage_subpool *hugepage_new_subpool(struct hstate *h, long max_hpages, |
48 | long min_hpages); | |
90481622 DG |
49 | void hugepage_put_subpool(struct hugepage_subpool *spool); |
50 | ||
a1e78772 | 51 | void reset_vma_resv_huge_pages(struct vm_area_struct *vma); |
8d65af78 AD |
52 | int hugetlb_sysctl_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *); |
53 | int hugetlb_overcommit_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *); | |
54 | int hugetlb_treat_movable_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *); | |
06808b08 LS |
55 | |
56 | #ifdef CONFIG_NUMA | |
57 | int hugetlb_mempolicy_sysctl_handler(struct ctl_table *, int, | |
58 | void __user *, size_t *, loff_t *); | |
59 | #endif | |
60 | ||
1da177e4 | 61 | int copy_hugetlb_page_range(struct mm_struct *, struct mm_struct *, struct vm_area_struct *); |
28a35716 ML |
62 | long follow_hugetlb_page(struct mm_struct *, struct vm_area_struct *, |
63 | struct page **, struct vm_area_struct **, | |
64 | unsigned long *, unsigned long *, long, unsigned int); | |
04f2cbe3 | 65 | void unmap_hugepage_range(struct vm_area_struct *, |
24669e58 | 66 | unsigned long, unsigned long, struct page *); |
d833352a MG |
67 | void __unmap_hugepage_range_final(struct mmu_gather *tlb, |
68 | struct vm_area_struct *vma, | |
69 | unsigned long start, unsigned long end, | |
70 | struct page *ref_page); | |
24669e58 AK |
71 | void __unmap_hugepage_range(struct mmu_gather *tlb, struct vm_area_struct *vma, |
72 | unsigned long start, unsigned long end, | |
73 | struct page *ref_page); | |
e1759c21 | 74 | void hugetlb_report_meminfo(struct seq_file *); |
1da177e4 | 75 | int hugetlb_report_node_meminfo(int, char *); |
949f7ec5 | 76 | void hugetlb_show_meminfo(void); |
1da177e4 | 77 | unsigned long hugetlb_total_pages(void); |
ac9b9c66 | 78 | int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma, |
788c7df4 | 79 | unsigned long address, unsigned int flags); |
a1e78772 | 80 | int hugetlb_reserve_pages(struct inode *inode, long from, long to, |
5a6fe125 | 81 | struct vm_area_struct *vma, |
ca16d140 | 82 | vm_flags_t vm_flags); |
a43a8c39 | 83 | void hugetlb_unreserve_pages(struct inode *inode, long offset, long freed); |
6de2b1aa | 84 | int dequeue_hwpoisoned_huge_page(struct page *page); |
31caf665 NH |
85 | bool isolate_huge_page(struct page *page, struct list_head *list); |
86 | void putback_active_hugepage(struct page *page); | |
8f1d26d0 | 87 | void free_huge_page(struct page *page); |
1da177e4 | 88 | |
3212b535 SC |
89 | #ifdef CONFIG_ARCH_WANT_HUGE_PMD_SHARE |
90 | pte_t *huge_pmd_share(struct mm_struct *mm, unsigned long addr, pud_t *pud); | |
91 | #endif | |
92 | ||
753162cd | 93 | extern int hugepages_treat_as_movable; |
1da177e4 | 94 | extern int sysctl_hugetlb_shm_group; |
53ba51d2 | 95 | extern struct list_head huge_boot_pages; |
1da177e4 | 96 | |
63551ae0 DG |
97 | /* arch callbacks */ |
98 | ||
a5516438 AK |
99 | pte_t *huge_pte_alloc(struct mm_struct *mm, |
100 | unsigned long addr, unsigned long sz); | |
63551ae0 | 101 | pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr); |
39dde65c | 102 | int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep); |
63551ae0 DG |
103 | struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address, |
104 | int write); | |
105 | struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address, | |
e66f17ff | 106 | pmd_t *pmd, int flags); |
ceb86879 | 107 | struct page *follow_huge_pud(struct mm_struct *mm, unsigned long address, |
e66f17ff | 108 | pud_t *pud, int flags); |
63551ae0 | 109 | int pmd_huge(pmd_t pmd); |
ceb86879 | 110 | int pud_huge(pud_t pmd); |
7da4d641 | 111 | unsigned long hugetlb_change_protection(struct vm_area_struct *vma, |
8f860591 | 112 | unsigned long address, unsigned long end, pgprot_t newprot); |
63551ae0 | 113 | |
1da177e4 LT |
114 | #else /* !CONFIG_HUGETLB_PAGE */ |
115 | ||
a1e78772 MG |
116 | static inline void reset_vma_resv_huge_pages(struct vm_area_struct *vma) |
117 | { | |
118 | } | |
119 | ||
1da177e4 LT |
120 | static inline unsigned long hugetlb_total_pages(void) |
121 | { | |
122 | return 0; | |
123 | } | |
124 | ||
5b23dbe8 | 125 | #define follow_hugetlb_page(m,v,p,vs,a,b,i,w) ({ BUG(); 0; }) |
1da177e4 LT |
126 | #define follow_huge_addr(mm, addr, write) ERR_PTR(-EINVAL) |
127 | #define copy_hugetlb_page_range(src, dst, vma) ({ BUG(); 0; }) | |
e1759c21 AD |
128 | static inline void hugetlb_report_meminfo(struct seq_file *m) |
129 | { | |
130 | } | |
1da177e4 | 131 | #define hugetlb_report_node_meminfo(n, buf) 0 |
949f7ec5 DR |
132 | static inline void hugetlb_show_meminfo(void) |
133 | { | |
134 | } | |
e66f17ff NH |
135 | #define follow_huge_pmd(mm, addr, pmd, flags) NULL |
136 | #define follow_huge_pud(mm, addr, pud, flags) NULL | |
a5516438 | 137 | #define prepare_hugepage_range(file, addr, len) (-EINVAL) |
1da177e4 | 138 | #define pmd_huge(x) 0 |
ceb86879 | 139 | #define pud_huge(x) 0 |
1da177e4 | 140 | #define is_hugepage_only_range(mm, addr, len) 0 |
9da61aef | 141 | #define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) ({BUG(); 0; }) |
788c7df4 | 142 | #define hugetlb_fault(mm, vma, addr, flags) ({ BUG(); 0; }) |
0fe6e20b | 143 | #define huge_pte_offset(mm, address) 0 |
24669e58 AK |
144 | static inline int dequeue_hwpoisoned_huge_page(struct page *page) |
145 | { | |
146 | return 0; | |
147 | } | |
148 | ||
f40386a4 NH |
149 | static inline bool isolate_huge_page(struct page *page, struct list_head *list) |
150 | { | |
151 | return false; | |
152 | } | |
31caf665 | 153 | #define putback_active_hugepage(p) do {} while (0) |
1da177e4 | 154 | |
7da4d641 PZ |
155 | static inline unsigned long hugetlb_change_protection(struct vm_area_struct *vma, |
156 | unsigned long address, unsigned long end, pgprot_t newprot) | |
157 | { | |
158 | return 0; | |
159 | } | |
8f860591 | 160 | |
d833352a MG |
161 | static inline void __unmap_hugepage_range_final(struct mmu_gather *tlb, |
162 | struct vm_area_struct *vma, unsigned long start, | |
163 | unsigned long end, struct page *ref_page) | |
164 | { | |
165 | BUG(); | |
166 | } | |
167 | ||
24669e58 AK |
168 | static inline void __unmap_hugepage_range(struct mmu_gather *tlb, |
169 | struct vm_area_struct *vma, unsigned long start, | |
170 | unsigned long end, struct page *ref_page) | |
171 | { | |
172 | BUG(); | |
173 | } | |
174 | ||
1da177e4 | 175 | #endif /* !CONFIG_HUGETLB_PAGE */ |
f30c59e9 AK |
176 | /* |
177 | * hugepages at page global directory. If arch support | |
178 | * hugepages at pgd level, they need to define this. | |
179 | */ | |
180 | #ifndef pgd_huge | |
181 | #define pgd_huge(x) 0 | |
182 | #endif | |
183 | ||
184 | #ifndef pgd_write | |
185 | static inline int pgd_write(pgd_t pgd) | |
186 | { | |
187 | BUG(); | |
188 | return 0; | |
189 | } | |
190 | #endif | |
191 | ||
192 | #ifndef pud_write | |
193 | static inline int pud_write(pud_t pud) | |
194 | { | |
195 | BUG(); | |
196 | return 0; | |
197 | } | |
198 | #endif | |
199 | ||
200 | #ifndef is_hugepd | |
201 | /* | |
202 | * Some architectures requires a hugepage directory format that is | |
203 | * required to support multiple hugepage sizes. For example | |
204 | * a4fe3ce76 "powerpc/mm: Allow more flexible layouts for hugepage pagetables" | |
205 | * introduced the same on powerpc. This allows for a more flexible hugepage | |
206 | * pagetable layout. | |
207 | */ | |
208 | typedef struct { unsigned long pd; } hugepd_t; | |
209 | #define is_hugepd(hugepd) (0) | |
210 | #define __hugepd(x) ((hugepd_t) { (x) }) | |
211 | static inline int gup_huge_pd(hugepd_t hugepd, unsigned long addr, | |
212 | unsigned pdshift, unsigned long end, | |
213 | int write, struct page **pages, int *nr) | |
214 | { | |
215 | return 0; | |
216 | } | |
217 | #else | |
218 | extern int gup_huge_pd(hugepd_t hugepd, unsigned long addr, | |
219 | unsigned pdshift, unsigned long end, | |
220 | int write, struct page **pages, int *nr); | |
221 | #endif | |
1da177e4 | 222 | |
4e52780d EM |
223 | #define HUGETLB_ANON_FILE "anon_hugepage" |
224 | ||
6bfde05b EM |
225 | enum { |
226 | /* | |
227 | * The file will be used as an shm file so shmfs accounting rules | |
228 | * apply | |
229 | */ | |
230 | HUGETLB_SHMFS_INODE = 1, | |
4e52780d EM |
231 | /* |
232 | * The file is being created on the internal vfs mount and shmfs | |
233 | * accounting rules do not apply | |
234 | */ | |
235 | HUGETLB_ANONHUGE_INODE = 2, | |
6bfde05b EM |
236 | }; |
237 | ||
1da177e4 | 238 | #ifdef CONFIG_HUGETLBFS |
1da177e4 | 239 | struct hugetlbfs_sb_info { |
1da177e4 LT |
240 | long max_inodes; /* inodes allowed */ |
241 | long free_inodes; /* inodes free */ | |
242 | spinlock_t stat_lock; | |
a137e1cc | 243 | struct hstate *hstate; |
90481622 | 244 | struct hugepage_subpool *spool; |
1da177e4 LT |
245 | }; |
246 | ||
1da177e4 LT |
247 | static inline struct hugetlbfs_sb_info *HUGETLBFS_SB(struct super_block *sb) |
248 | { | |
249 | return sb->s_fs_info; | |
250 | } | |
251 | ||
4b6f5d20 | 252 | extern const struct file_operations hugetlbfs_file_operations; |
f0f37e2f | 253 | extern const struct vm_operations_struct hugetlb_vm_ops; |
af73e4d9 | 254 | struct file *hugetlb_file_setup(const char *name, size_t size, vm_flags_t acct, |
42d7395f AK |
255 | struct user_struct **user, int creat_flags, |
256 | int page_size_log); | |
1da177e4 LT |
257 | |
258 | static inline int is_file_hugepages(struct file *file) | |
259 | { | |
516dffdc AL |
260 | if (file->f_op == &hugetlbfs_file_operations) |
261 | return 1; | |
262 | if (is_file_shm_hugepages(file)) | |
263 | return 1; | |
264 | ||
265 | return 0; | |
1da177e4 LT |
266 | } |
267 | ||
42d7395f | 268 | |
1da177e4 LT |
269 | #else /* !CONFIG_HUGETLBFS */ |
270 | ||
1db8508c | 271 | #define is_file_hugepages(file) 0 |
40716e29 | 272 | static inline struct file * |
af73e4d9 NH |
273 | hugetlb_file_setup(const char *name, size_t size, vm_flags_t acctflag, |
274 | struct user_struct **user, int creat_flags, | |
42d7395f | 275 | int page_size_log) |
e9ea0e2d AM |
276 | { |
277 | return ERR_PTR(-ENOSYS); | |
278 | } | |
1da177e4 LT |
279 | |
280 | #endif /* !CONFIG_HUGETLBFS */ | |
281 | ||
d2ba27e8 AB |
282 | #ifdef HAVE_ARCH_HUGETLB_UNMAPPED_AREA |
283 | unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr, | |
284 | unsigned long len, unsigned long pgoff, | |
285 | unsigned long flags); | |
286 | #endif /* HAVE_ARCH_HUGETLB_UNMAPPED_AREA */ | |
287 | ||
a5516438 AK |
288 | #ifdef CONFIG_HUGETLB_PAGE |
289 | ||
a3437870 | 290 | #define HSTATE_NAME_LEN 32 |
a5516438 AK |
291 | /* Defines one hugetlb page size */ |
292 | struct hstate { | |
e8c5c824 LS |
293 | int next_nid_to_alloc; |
294 | int next_nid_to_free; | |
a5516438 AK |
295 | unsigned int order; |
296 | unsigned long mask; | |
297 | unsigned long max_huge_pages; | |
298 | unsigned long nr_huge_pages; | |
299 | unsigned long free_huge_pages; | |
300 | unsigned long resv_huge_pages; | |
301 | unsigned long surplus_huge_pages; | |
302 | unsigned long nr_overcommit_huge_pages; | |
0edaecfa | 303 | struct list_head hugepage_activelist; |
a5516438 AK |
304 | struct list_head hugepage_freelists[MAX_NUMNODES]; |
305 | unsigned int nr_huge_pages_node[MAX_NUMNODES]; | |
306 | unsigned int free_huge_pages_node[MAX_NUMNODES]; | |
307 | unsigned int surplus_huge_pages_node[MAX_NUMNODES]; | |
abb8206c AK |
308 | #ifdef CONFIG_CGROUP_HUGETLB |
309 | /* cgroup control files */ | |
310 | struct cftype cgroup_files[5]; | |
311 | #endif | |
a3437870 | 312 | char name[HSTATE_NAME_LEN]; |
a5516438 AK |
313 | }; |
314 | ||
53ba51d2 JT |
315 | struct huge_bootmem_page { |
316 | struct list_head list; | |
317 | struct hstate *hstate; | |
ee8f248d BB |
318 | #ifdef CONFIG_HIGHMEM |
319 | phys_addr_t phys; | |
320 | #endif | |
53ba51d2 JT |
321 | }; |
322 | ||
bf50bab2 | 323 | struct page *alloc_huge_page_node(struct hstate *h, int nid); |
74060e4d NH |
324 | struct page *alloc_huge_page_noerr(struct vm_area_struct *vma, |
325 | unsigned long addr, int avoid_reserve); | |
bf50bab2 | 326 | |
53ba51d2 JT |
327 | /* arch callback */ |
328 | int __init alloc_bootmem_huge_page(struct hstate *h); | |
329 | ||
e5ff2159 AK |
330 | void __init hugetlb_add_hstate(unsigned order); |
331 | struct hstate *size_to_hstate(unsigned long size); | |
332 | ||
333 | #ifndef HUGE_MAX_HSTATE | |
334 | #define HUGE_MAX_HSTATE 1 | |
335 | #endif | |
336 | ||
337 | extern struct hstate hstates[HUGE_MAX_HSTATE]; | |
338 | extern unsigned int default_hstate_idx; | |
339 | ||
340 | #define default_hstate (hstates[default_hstate_idx]) | |
a5516438 | 341 | |
a137e1cc | 342 | static inline struct hstate *hstate_inode(struct inode *i) |
a5516438 | 343 | { |
a137e1cc AK |
344 | struct hugetlbfs_sb_info *hsb; |
345 | hsb = HUGETLBFS_SB(i->i_sb); | |
346 | return hsb->hstate; | |
a5516438 AK |
347 | } |
348 | ||
349 | static inline struct hstate *hstate_file(struct file *f) | |
350 | { | |
496ad9aa | 351 | return hstate_inode(file_inode(f)); |
a5516438 AK |
352 | } |
353 | ||
af73e4d9 NH |
354 | static inline struct hstate *hstate_sizelog(int page_size_log) |
355 | { | |
356 | if (!page_size_log) | |
357 | return &default_hstate; | |
97ad2be1 SL |
358 | |
359 | return size_to_hstate(1UL << page_size_log); | |
af73e4d9 NH |
360 | } |
361 | ||
a137e1cc | 362 | static inline struct hstate *hstate_vma(struct vm_area_struct *vma) |
a5516438 | 363 | { |
a137e1cc | 364 | return hstate_file(vma->vm_file); |
a5516438 AK |
365 | } |
366 | ||
367 | static inline unsigned long huge_page_size(struct hstate *h) | |
368 | { | |
369 | return (unsigned long)PAGE_SIZE << h->order; | |
370 | } | |
371 | ||
08fba699 MG |
372 | extern unsigned long vma_kernel_pagesize(struct vm_area_struct *vma); |
373 | ||
3340289d MG |
374 | extern unsigned long vma_mmu_pagesize(struct vm_area_struct *vma); |
375 | ||
a5516438 AK |
376 | static inline unsigned long huge_page_mask(struct hstate *h) |
377 | { | |
378 | return h->mask; | |
379 | } | |
380 | ||
381 | static inline unsigned int huge_page_order(struct hstate *h) | |
382 | { | |
383 | return h->order; | |
384 | } | |
385 | ||
386 | static inline unsigned huge_page_shift(struct hstate *h) | |
387 | { | |
388 | return h->order + PAGE_SHIFT; | |
389 | } | |
390 | ||
bae7f4ae LC |
391 | static inline bool hstate_is_gigantic(struct hstate *h) |
392 | { | |
393 | return huge_page_order(h) >= MAX_ORDER; | |
394 | } | |
395 | ||
a5516438 AK |
396 | static inline unsigned int pages_per_huge_page(struct hstate *h) |
397 | { | |
398 | return 1 << h->order; | |
399 | } | |
400 | ||
401 | static inline unsigned int blocks_per_huge_page(struct hstate *h) | |
402 | { | |
403 | return huge_page_size(h) / 512; | |
404 | } | |
405 | ||
406 | #include <asm/hugetlb.h> | |
407 | ||
d9ed9faa CM |
408 | #ifndef arch_make_huge_pte |
409 | static inline pte_t arch_make_huge_pte(pte_t entry, struct vm_area_struct *vma, | |
410 | struct page *page, int writable) | |
411 | { | |
412 | return entry; | |
413 | } | |
414 | #endif | |
415 | ||
e5ff2159 AK |
416 | static inline struct hstate *page_hstate(struct page *page) |
417 | { | |
309381fe | 418 | VM_BUG_ON_PAGE(!PageHuge(page), page); |
e5ff2159 AK |
419 | return size_to_hstate(PAGE_SIZE << compound_order(page)); |
420 | } | |
421 | ||
aa50d3a7 AK |
422 | static inline unsigned hstate_index_to_shift(unsigned index) |
423 | { | |
424 | return hstates[index].order + PAGE_SHIFT; | |
425 | } | |
426 | ||
972dc4de AK |
427 | static inline int hstate_index(struct hstate *h) |
428 | { | |
429 | return h - hstates; | |
430 | } | |
431 | ||
13d60f4b ZY |
432 | pgoff_t __basepage_index(struct page *page); |
433 | ||
434 | /* Return page->index in PAGE_SIZE units */ | |
435 | static inline pgoff_t basepage_index(struct page *page) | |
436 | { | |
437 | if (!PageCompound(page)) | |
438 | return page->index; | |
439 | ||
440 | return __basepage_index(page); | |
441 | } | |
442 | ||
c8721bbb NH |
443 | extern void dissolve_free_huge_pages(unsigned long start_pfn, |
444 | unsigned long end_pfn); | |
100873d7 | 445 | static inline int hugepage_migration_supported(struct hstate *h) |
83467efb | 446 | { |
c177c81e NH |
447 | #ifdef CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION |
448 | return huge_page_shift(h) == PMD_SHIFT; | |
449 | #else | |
450 | return 0; | |
451 | #endif | |
83467efb | 452 | } |
c8721bbb | 453 | |
cb900f41 KS |
454 | static inline spinlock_t *huge_pte_lockptr(struct hstate *h, |
455 | struct mm_struct *mm, pte_t *pte) | |
456 | { | |
457 | if (huge_page_size(h) == PMD_SIZE) | |
458 | return pmd_lockptr(mm, (pmd_t *) pte); | |
459 | VM_BUG_ON(huge_page_size(h) == PAGE_SIZE); | |
460 | return &mm->page_table_lock; | |
461 | } | |
462 | ||
2531c8cf DD |
463 | #ifndef hugepages_supported |
464 | /* | |
465 | * Some platform decide whether they support huge pages at boot | |
466 | * time. Some of them, such as powerpc, set HPAGE_SHIFT to 0 | |
467 | * when there is no such support | |
468 | */ | |
469 | #define hugepages_supported() (HPAGE_SHIFT != 0) | |
470 | #endif | |
457c1b27 | 471 | |
af73e4d9 | 472 | #else /* CONFIG_HUGETLB_PAGE */ |
a5516438 | 473 | struct hstate {}; |
bf50bab2 | 474 | #define alloc_huge_page_node(h, nid) NULL |
74060e4d | 475 | #define alloc_huge_page_noerr(v, a, r) NULL |
53ba51d2 | 476 | #define alloc_bootmem_huge_page(h) NULL |
a5516438 | 477 | #define hstate_file(f) NULL |
af73e4d9 | 478 | #define hstate_sizelog(s) NULL |
a5516438 AK |
479 | #define hstate_vma(v) NULL |
480 | #define hstate_inode(i) NULL | |
cb900f41 | 481 | #define page_hstate(page) NULL |
a5516438 AK |
482 | #define huge_page_size(h) PAGE_SIZE |
483 | #define huge_page_mask(h) PAGE_MASK | |
08fba699 | 484 | #define vma_kernel_pagesize(v) PAGE_SIZE |
3340289d | 485 | #define vma_mmu_pagesize(v) PAGE_SIZE |
a5516438 AK |
486 | #define huge_page_order(h) 0 |
487 | #define huge_page_shift(h) PAGE_SHIFT | |
510a35d4 AR |
488 | static inline unsigned int pages_per_huge_page(struct hstate *h) |
489 | { | |
490 | return 1; | |
491 | } | |
aa50d3a7 | 492 | #define hstate_index_to_shift(index) 0 |
972dc4de | 493 | #define hstate_index(h) 0 |
13d60f4b ZY |
494 | |
495 | static inline pgoff_t basepage_index(struct page *page) | |
496 | { | |
497 | return page->index; | |
498 | } | |
c8721bbb | 499 | #define dissolve_free_huge_pages(s, e) do {} while (0) |
100873d7 | 500 | #define hugepage_migration_supported(h) 0 |
cb900f41 KS |
501 | |
502 | static inline spinlock_t *huge_pte_lockptr(struct hstate *h, | |
503 | struct mm_struct *mm, pte_t *pte) | |
504 | { | |
505 | return &mm->page_table_lock; | |
506 | } | |
af73e4d9 | 507 | #endif /* CONFIG_HUGETLB_PAGE */ |
a5516438 | 508 | |
cb900f41 KS |
509 | static inline spinlock_t *huge_pte_lock(struct hstate *h, |
510 | struct mm_struct *mm, pte_t *pte) | |
511 | { | |
512 | spinlock_t *ptl; | |
513 | ||
514 | ptl = huge_pte_lockptr(h, mm, pte); | |
515 | spin_lock(ptl); | |
516 | return ptl; | |
517 | } | |
518 | ||
1da177e4 | 519 | #endif /* _LINUX_HUGETLB_H */ |