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 | 37 | struct list_head regions; |
5e911373 MK |
38 | long adds_in_progress; |
39 | struct list_head region_cache; | |
40 | long region_cache_count; | |
9119a41e JK |
41 | }; |
42 | extern struct resv_map *resv_map_alloc(void); | |
43 | void resv_map_release(struct kref *ref); | |
44 | ||
c3f38a38 AK |
45 | extern spinlock_t hugetlb_lock; |
46 | extern int hugetlb_max_hstate __read_mostly; | |
47 | #define for_each_hstate(h) \ | |
48 | for ((h) = hstates; (h) < &hstates[hugetlb_max_hstate]; (h)++) | |
49 | ||
7ca02d0a MK |
50 | struct hugepage_subpool *hugepage_new_subpool(struct hstate *h, long max_hpages, |
51 | long min_hpages); | |
90481622 DG |
52 | void hugepage_put_subpool(struct hugepage_subpool *spool); |
53 | ||
a1e78772 | 54 | void reset_vma_resv_huge_pages(struct vm_area_struct *vma); |
8d65af78 AD |
55 | int hugetlb_sysctl_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *); |
56 | int hugetlb_overcommit_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *); | |
57 | int hugetlb_treat_movable_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *); | |
06808b08 LS |
58 | |
59 | #ifdef CONFIG_NUMA | |
60 | int hugetlb_mempolicy_sysctl_handler(struct ctl_table *, int, | |
61 | void __user *, size_t *, loff_t *); | |
62 | #endif | |
63 | ||
1da177e4 | 64 | int copy_hugetlb_page_range(struct mm_struct *, struct mm_struct *, struct vm_area_struct *); |
28a35716 ML |
65 | long follow_hugetlb_page(struct mm_struct *, struct vm_area_struct *, |
66 | struct page **, struct vm_area_struct **, | |
67 | unsigned long *, unsigned long *, long, unsigned int); | |
04f2cbe3 | 68 | void unmap_hugepage_range(struct vm_area_struct *, |
24669e58 | 69 | unsigned long, unsigned long, struct page *); |
d833352a MG |
70 | void __unmap_hugepage_range_final(struct mmu_gather *tlb, |
71 | struct vm_area_struct *vma, | |
72 | unsigned long start, unsigned long end, | |
73 | struct page *ref_page); | |
24669e58 AK |
74 | void __unmap_hugepage_range(struct mmu_gather *tlb, struct vm_area_struct *vma, |
75 | unsigned long start, unsigned long end, | |
76 | struct page *ref_page); | |
e1759c21 | 77 | void hugetlb_report_meminfo(struct seq_file *); |
1da177e4 | 78 | int hugetlb_report_node_meminfo(int, char *); |
949f7ec5 | 79 | void hugetlb_show_meminfo(void); |
1da177e4 | 80 | unsigned long hugetlb_total_pages(void); |
ac9b9c66 | 81 | int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma, |
788c7df4 | 82 | unsigned long address, unsigned int flags); |
a1e78772 | 83 | int hugetlb_reserve_pages(struct inode *inode, long from, long to, |
5a6fe125 | 84 | struct vm_area_struct *vma, |
ca16d140 | 85 | vm_flags_t vm_flags); |
a43a8c39 | 86 | void hugetlb_unreserve_pages(struct inode *inode, long offset, long freed); |
6de2b1aa | 87 | int dequeue_hwpoisoned_huge_page(struct page *page); |
31caf665 NH |
88 | bool isolate_huge_page(struct page *page, struct list_head *list); |
89 | void putback_active_hugepage(struct page *page); | |
8f1d26d0 | 90 | void free_huge_page(struct page *page); |
c672c7f2 MK |
91 | extern struct mutex *hugetlb_fault_mutex_table; |
92 | u32 hugetlb_fault_mutex_hash(struct hstate *h, struct mm_struct *mm, | |
93 | struct vm_area_struct *vma, | |
94 | struct address_space *mapping, | |
95 | pgoff_t idx, unsigned long address); | |
1da177e4 | 96 | |
3212b535 SC |
97 | #ifdef CONFIG_ARCH_WANT_HUGE_PMD_SHARE |
98 | pte_t *huge_pmd_share(struct mm_struct *mm, unsigned long addr, pud_t *pud); | |
99 | #endif | |
100 | ||
753162cd | 101 | extern int hugepages_treat_as_movable; |
1da177e4 | 102 | extern int sysctl_hugetlb_shm_group; |
53ba51d2 | 103 | extern struct list_head huge_boot_pages; |
1da177e4 | 104 | |
63551ae0 DG |
105 | /* arch callbacks */ |
106 | ||
a5516438 AK |
107 | pte_t *huge_pte_alloc(struct mm_struct *mm, |
108 | unsigned long addr, unsigned long sz); | |
63551ae0 | 109 | pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr); |
39dde65c | 110 | int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep); |
63551ae0 DG |
111 | struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address, |
112 | int write); | |
113 | struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address, | |
e66f17ff | 114 | pmd_t *pmd, int flags); |
ceb86879 | 115 | struct page *follow_huge_pud(struct mm_struct *mm, unsigned long address, |
e66f17ff | 116 | pud_t *pud, int flags); |
63551ae0 | 117 | int pmd_huge(pmd_t pmd); |
ceb86879 | 118 | int pud_huge(pud_t pmd); |
7da4d641 | 119 | unsigned long hugetlb_change_protection(struct vm_area_struct *vma, |
8f860591 | 120 | unsigned long address, unsigned long end, pgprot_t newprot); |
63551ae0 | 121 | |
1da177e4 LT |
122 | #else /* !CONFIG_HUGETLB_PAGE */ |
123 | ||
a1e78772 MG |
124 | static inline void reset_vma_resv_huge_pages(struct vm_area_struct *vma) |
125 | { | |
126 | } | |
127 | ||
1da177e4 LT |
128 | static inline unsigned long hugetlb_total_pages(void) |
129 | { | |
130 | return 0; | |
131 | } | |
132 | ||
5b23dbe8 | 133 | #define follow_hugetlb_page(m,v,p,vs,a,b,i,w) ({ BUG(); 0; }) |
1da177e4 LT |
134 | #define follow_huge_addr(mm, addr, write) ERR_PTR(-EINVAL) |
135 | #define copy_hugetlb_page_range(src, dst, vma) ({ BUG(); 0; }) | |
e1759c21 AD |
136 | static inline void hugetlb_report_meminfo(struct seq_file *m) |
137 | { | |
138 | } | |
1da177e4 | 139 | #define hugetlb_report_node_meminfo(n, buf) 0 |
949f7ec5 DR |
140 | static inline void hugetlb_show_meminfo(void) |
141 | { | |
142 | } | |
e66f17ff NH |
143 | #define follow_huge_pmd(mm, addr, pmd, flags) NULL |
144 | #define follow_huge_pud(mm, addr, pud, flags) NULL | |
a5516438 | 145 | #define prepare_hugepage_range(file, addr, len) (-EINVAL) |
1da177e4 | 146 | #define pmd_huge(x) 0 |
ceb86879 | 147 | #define pud_huge(x) 0 |
1da177e4 | 148 | #define is_hugepage_only_range(mm, addr, len) 0 |
9da61aef | 149 | #define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) ({BUG(); 0; }) |
788c7df4 | 150 | #define hugetlb_fault(mm, vma, addr, flags) ({ BUG(); 0; }) |
0fe6e20b | 151 | #define huge_pte_offset(mm, address) 0 |
24669e58 AK |
152 | static inline int dequeue_hwpoisoned_huge_page(struct page *page) |
153 | { | |
154 | return 0; | |
155 | } | |
156 | ||
f40386a4 NH |
157 | static inline bool isolate_huge_page(struct page *page, struct list_head *list) |
158 | { | |
159 | return false; | |
160 | } | |
31caf665 | 161 | #define putback_active_hugepage(p) do {} while (0) |
1da177e4 | 162 | |
7da4d641 PZ |
163 | static inline unsigned long hugetlb_change_protection(struct vm_area_struct *vma, |
164 | unsigned long address, unsigned long end, pgprot_t newprot) | |
165 | { | |
166 | return 0; | |
167 | } | |
8f860591 | 168 | |
d833352a MG |
169 | static inline void __unmap_hugepage_range_final(struct mmu_gather *tlb, |
170 | struct vm_area_struct *vma, unsigned long start, | |
171 | unsigned long end, struct page *ref_page) | |
172 | { | |
173 | BUG(); | |
174 | } | |
175 | ||
24669e58 AK |
176 | static inline void __unmap_hugepage_range(struct mmu_gather *tlb, |
177 | struct vm_area_struct *vma, unsigned long start, | |
178 | unsigned long end, struct page *ref_page) | |
179 | { | |
180 | BUG(); | |
181 | } | |
182 | ||
1da177e4 | 183 | #endif /* !CONFIG_HUGETLB_PAGE */ |
f30c59e9 AK |
184 | /* |
185 | * hugepages at page global directory. If arch support | |
186 | * hugepages at pgd level, they need to define this. | |
187 | */ | |
188 | #ifndef pgd_huge | |
189 | #define pgd_huge(x) 0 | |
190 | #endif | |
191 | ||
192 | #ifndef pgd_write | |
193 | static inline int pgd_write(pgd_t pgd) | |
194 | { | |
195 | BUG(); | |
196 | return 0; | |
197 | } | |
198 | #endif | |
199 | ||
200 | #ifndef pud_write | |
201 | static inline int pud_write(pud_t pud) | |
202 | { | |
203 | BUG(); | |
204 | return 0; | |
205 | } | |
206 | #endif | |
207 | ||
208 | #ifndef is_hugepd | |
209 | /* | |
210 | * Some architectures requires a hugepage directory format that is | |
211 | * required to support multiple hugepage sizes. For example | |
212 | * a4fe3ce76 "powerpc/mm: Allow more flexible layouts for hugepage pagetables" | |
213 | * introduced the same on powerpc. This allows for a more flexible hugepage | |
214 | * pagetable layout. | |
215 | */ | |
216 | typedef struct { unsigned long pd; } hugepd_t; | |
217 | #define is_hugepd(hugepd) (0) | |
218 | #define __hugepd(x) ((hugepd_t) { (x) }) | |
219 | static inline int gup_huge_pd(hugepd_t hugepd, unsigned long addr, | |
220 | unsigned pdshift, unsigned long end, | |
221 | int write, struct page **pages, int *nr) | |
222 | { | |
223 | return 0; | |
224 | } | |
225 | #else | |
226 | extern int gup_huge_pd(hugepd_t hugepd, unsigned long addr, | |
227 | unsigned pdshift, unsigned long end, | |
228 | int write, struct page **pages, int *nr); | |
229 | #endif | |
1da177e4 | 230 | |
4e52780d EM |
231 | #define HUGETLB_ANON_FILE "anon_hugepage" |
232 | ||
6bfde05b EM |
233 | enum { |
234 | /* | |
235 | * The file will be used as an shm file so shmfs accounting rules | |
236 | * apply | |
237 | */ | |
238 | HUGETLB_SHMFS_INODE = 1, | |
4e52780d EM |
239 | /* |
240 | * The file is being created on the internal vfs mount and shmfs | |
241 | * accounting rules do not apply | |
242 | */ | |
243 | HUGETLB_ANONHUGE_INODE = 2, | |
6bfde05b EM |
244 | }; |
245 | ||
1da177e4 | 246 | #ifdef CONFIG_HUGETLBFS |
1da177e4 | 247 | struct hugetlbfs_sb_info { |
1da177e4 LT |
248 | long max_inodes; /* inodes allowed */ |
249 | long free_inodes; /* inodes free */ | |
250 | spinlock_t stat_lock; | |
a137e1cc | 251 | struct hstate *hstate; |
90481622 | 252 | struct hugepage_subpool *spool; |
1da177e4 LT |
253 | }; |
254 | ||
1da177e4 LT |
255 | static inline struct hugetlbfs_sb_info *HUGETLBFS_SB(struct super_block *sb) |
256 | { | |
257 | return sb->s_fs_info; | |
258 | } | |
259 | ||
4b6f5d20 | 260 | extern const struct file_operations hugetlbfs_file_operations; |
f0f37e2f | 261 | extern const struct vm_operations_struct hugetlb_vm_ops; |
af73e4d9 | 262 | struct file *hugetlb_file_setup(const char *name, size_t size, vm_flags_t acct, |
42d7395f AK |
263 | struct user_struct **user, int creat_flags, |
264 | int page_size_log); | |
1da177e4 LT |
265 | |
266 | static inline int is_file_hugepages(struct file *file) | |
267 | { | |
516dffdc AL |
268 | if (file->f_op == &hugetlbfs_file_operations) |
269 | return 1; | |
270 | if (is_file_shm_hugepages(file)) | |
271 | return 1; | |
272 | ||
273 | return 0; | |
1da177e4 LT |
274 | } |
275 | ||
42d7395f | 276 | |
1da177e4 LT |
277 | #else /* !CONFIG_HUGETLBFS */ |
278 | ||
1db8508c | 279 | #define is_file_hugepages(file) 0 |
40716e29 | 280 | static inline struct file * |
af73e4d9 NH |
281 | hugetlb_file_setup(const char *name, size_t size, vm_flags_t acctflag, |
282 | struct user_struct **user, int creat_flags, | |
42d7395f | 283 | int page_size_log) |
e9ea0e2d AM |
284 | { |
285 | return ERR_PTR(-ENOSYS); | |
286 | } | |
1da177e4 LT |
287 | |
288 | #endif /* !CONFIG_HUGETLBFS */ | |
289 | ||
d2ba27e8 AB |
290 | #ifdef HAVE_ARCH_HUGETLB_UNMAPPED_AREA |
291 | unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr, | |
292 | unsigned long len, unsigned long pgoff, | |
293 | unsigned long flags); | |
294 | #endif /* HAVE_ARCH_HUGETLB_UNMAPPED_AREA */ | |
295 | ||
a5516438 AK |
296 | #ifdef CONFIG_HUGETLB_PAGE |
297 | ||
a3437870 | 298 | #define HSTATE_NAME_LEN 32 |
a5516438 AK |
299 | /* Defines one hugetlb page size */ |
300 | struct hstate { | |
e8c5c824 LS |
301 | int next_nid_to_alloc; |
302 | int next_nid_to_free; | |
a5516438 AK |
303 | unsigned int order; |
304 | unsigned long mask; | |
305 | unsigned long max_huge_pages; | |
306 | unsigned long nr_huge_pages; | |
307 | unsigned long free_huge_pages; | |
308 | unsigned long resv_huge_pages; | |
309 | unsigned long surplus_huge_pages; | |
310 | unsigned long nr_overcommit_huge_pages; | |
0edaecfa | 311 | struct list_head hugepage_activelist; |
a5516438 AK |
312 | struct list_head hugepage_freelists[MAX_NUMNODES]; |
313 | unsigned int nr_huge_pages_node[MAX_NUMNODES]; | |
314 | unsigned int free_huge_pages_node[MAX_NUMNODES]; | |
315 | unsigned int surplus_huge_pages_node[MAX_NUMNODES]; | |
abb8206c AK |
316 | #ifdef CONFIG_CGROUP_HUGETLB |
317 | /* cgroup control files */ | |
318 | struct cftype cgroup_files[5]; | |
319 | #endif | |
a3437870 | 320 | char name[HSTATE_NAME_LEN]; |
a5516438 AK |
321 | }; |
322 | ||
53ba51d2 JT |
323 | struct huge_bootmem_page { |
324 | struct list_head list; | |
325 | struct hstate *hstate; | |
ee8f248d BB |
326 | #ifdef CONFIG_HIGHMEM |
327 | phys_addr_t phys; | |
328 | #endif | |
53ba51d2 JT |
329 | }; |
330 | ||
bf50bab2 | 331 | struct page *alloc_huge_page_node(struct hstate *h, int nid); |
74060e4d NH |
332 | struct page *alloc_huge_page_noerr(struct vm_area_struct *vma, |
333 | unsigned long addr, int avoid_reserve); | |
bf50bab2 | 334 | |
53ba51d2 JT |
335 | /* arch callback */ |
336 | int __init alloc_bootmem_huge_page(struct hstate *h); | |
337 | ||
e5ff2159 AK |
338 | void __init hugetlb_add_hstate(unsigned order); |
339 | struct hstate *size_to_hstate(unsigned long size); | |
340 | ||
341 | #ifndef HUGE_MAX_HSTATE | |
342 | #define HUGE_MAX_HSTATE 1 | |
343 | #endif | |
344 | ||
345 | extern struct hstate hstates[HUGE_MAX_HSTATE]; | |
346 | extern unsigned int default_hstate_idx; | |
347 | ||
348 | #define default_hstate (hstates[default_hstate_idx]) | |
a5516438 | 349 | |
a137e1cc | 350 | static inline struct hstate *hstate_inode(struct inode *i) |
a5516438 | 351 | { |
a137e1cc AK |
352 | struct hugetlbfs_sb_info *hsb; |
353 | hsb = HUGETLBFS_SB(i->i_sb); | |
354 | return hsb->hstate; | |
a5516438 AK |
355 | } |
356 | ||
357 | static inline struct hstate *hstate_file(struct file *f) | |
358 | { | |
496ad9aa | 359 | return hstate_inode(file_inode(f)); |
a5516438 AK |
360 | } |
361 | ||
af73e4d9 NH |
362 | static inline struct hstate *hstate_sizelog(int page_size_log) |
363 | { | |
364 | if (!page_size_log) | |
365 | return &default_hstate; | |
97ad2be1 SL |
366 | |
367 | return size_to_hstate(1UL << page_size_log); | |
af73e4d9 NH |
368 | } |
369 | ||
a137e1cc | 370 | static inline struct hstate *hstate_vma(struct vm_area_struct *vma) |
a5516438 | 371 | { |
a137e1cc | 372 | return hstate_file(vma->vm_file); |
a5516438 AK |
373 | } |
374 | ||
375 | static inline unsigned long huge_page_size(struct hstate *h) | |
376 | { | |
377 | return (unsigned long)PAGE_SIZE << h->order; | |
378 | } | |
379 | ||
08fba699 MG |
380 | extern unsigned long vma_kernel_pagesize(struct vm_area_struct *vma); |
381 | ||
3340289d MG |
382 | extern unsigned long vma_mmu_pagesize(struct vm_area_struct *vma); |
383 | ||
a5516438 AK |
384 | static inline unsigned long huge_page_mask(struct hstate *h) |
385 | { | |
386 | return h->mask; | |
387 | } | |
388 | ||
389 | static inline unsigned int huge_page_order(struct hstate *h) | |
390 | { | |
391 | return h->order; | |
392 | } | |
393 | ||
394 | static inline unsigned huge_page_shift(struct hstate *h) | |
395 | { | |
396 | return h->order + PAGE_SHIFT; | |
397 | } | |
398 | ||
bae7f4ae LC |
399 | static inline bool hstate_is_gigantic(struct hstate *h) |
400 | { | |
401 | return huge_page_order(h) >= MAX_ORDER; | |
402 | } | |
403 | ||
a5516438 AK |
404 | static inline unsigned int pages_per_huge_page(struct hstate *h) |
405 | { | |
406 | return 1 << h->order; | |
407 | } | |
408 | ||
409 | static inline unsigned int blocks_per_huge_page(struct hstate *h) | |
410 | { | |
411 | return huge_page_size(h) / 512; | |
412 | } | |
413 | ||
414 | #include <asm/hugetlb.h> | |
415 | ||
d9ed9faa CM |
416 | #ifndef arch_make_huge_pte |
417 | static inline pte_t arch_make_huge_pte(pte_t entry, struct vm_area_struct *vma, | |
418 | struct page *page, int writable) | |
419 | { | |
420 | return entry; | |
421 | } | |
422 | #endif | |
423 | ||
e5ff2159 AK |
424 | static inline struct hstate *page_hstate(struct page *page) |
425 | { | |
309381fe | 426 | VM_BUG_ON_PAGE(!PageHuge(page), page); |
e5ff2159 AK |
427 | return size_to_hstate(PAGE_SIZE << compound_order(page)); |
428 | } | |
429 | ||
aa50d3a7 AK |
430 | static inline unsigned hstate_index_to_shift(unsigned index) |
431 | { | |
432 | return hstates[index].order + PAGE_SHIFT; | |
433 | } | |
434 | ||
972dc4de AK |
435 | static inline int hstate_index(struct hstate *h) |
436 | { | |
437 | return h - hstates; | |
438 | } | |
439 | ||
13d60f4b ZY |
440 | pgoff_t __basepage_index(struct page *page); |
441 | ||
442 | /* Return page->index in PAGE_SIZE units */ | |
443 | static inline pgoff_t basepage_index(struct page *page) | |
444 | { | |
445 | if (!PageCompound(page)) | |
446 | return page->index; | |
447 | ||
448 | return __basepage_index(page); | |
449 | } | |
450 | ||
c8721bbb NH |
451 | extern void dissolve_free_huge_pages(unsigned long start_pfn, |
452 | unsigned long end_pfn); | |
100873d7 | 453 | static inline int hugepage_migration_supported(struct hstate *h) |
83467efb | 454 | { |
c177c81e NH |
455 | #ifdef CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION |
456 | return huge_page_shift(h) == PMD_SHIFT; | |
457 | #else | |
458 | return 0; | |
459 | #endif | |
83467efb | 460 | } |
c8721bbb | 461 | |
cb900f41 KS |
462 | static inline spinlock_t *huge_pte_lockptr(struct hstate *h, |
463 | struct mm_struct *mm, pte_t *pte) | |
464 | { | |
465 | if (huge_page_size(h) == PMD_SIZE) | |
466 | return pmd_lockptr(mm, (pmd_t *) pte); | |
467 | VM_BUG_ON(huge_page_size(h) == PAGE_SIZE); | |
468 | return &mm->page_table_lock; | |
469 | } | |
470 | ||
2531c8cf DD |
471 | #ifndef hugepages_supported |
472 | /* | |
473 | * Some platform decide whether they support huge pages at boot | |
474 | * time. Some of them, such as powerpc, set HPAGE_SHIFT to 0 | |
475 | * when there is no such support | |
476 | */ | |
477 | #define hugepages_supported() (HPAGE_SHIFT != 0) | |
478 | #endif | |
457c1b27 | 479 | |
af73e4d9 | 480 | #else /* CONFIG_HUGETLB_PAGE */ |
a5516438 | 481 | struct hstate {}; |
bf50bab2 | 482 | #define alloc_huge_page_node(h, nid) NULL |
74060e4d | 483 | #define alloc_huge_page_noerr(v, a, r) NULL |
53ba51d2 | 484 | #define alloc_bootmem_huge_page(h) NULL |
a5516438 | 485 | #define hstate_file(f) NULL |
af73e4d9 | 486 | #define hstate_sizelog(s) NULL |
a5516438 AK |
487 | #define hstate_vma(v) NULL |
488 | #define hstate_inode(i) NULL | |
cb900f41 | 489 | #define page_hstate(page) NULL |
a5516438 AK |
490 | #define huge_page_size(h) PAGE_SIZE |
491 | #define huge_page_mask(h) PAGE_MASK | |
08fba699 | 492 | #define vma_kernel_pagesize(v) PAGE_SIZE |
3340289d | 493 | #define vma_mmu_pagesize(v) PAGE_SIZE |
a5516438 AK |
494 | #define huge_page_order(h) 0 |
495 | #define huge_page_shift(h) PAGE_SHIFT | |
510a35d4 AR |
496 | static inline unsigned int pages_per_huge_page(struct hstate *h) |
497 | { | |
498 | return 1; | |
499 | } | |
aa50d3a7 | 500 | #define hstate_index_to_shift(index) 0 |
972dc4de | 501 | #define hstate_index(h) 0 |
13d60f4b ZY |
502 | |
503 | static inline pgoff_t basepage_index(struct page *page) | |
504 | { | |
505 | return page->index; | |
506 | } | |
c8721bbb | 507 | #define dissolve_free_huge_pages(s, e) do {} while (0) |
100873d7 | 508 | #define hugepage_migration_supported(h) 0 |
cb900f41 KS |
509 | |
510 | static inline spinlock_t *huge_pte_lockptr(struct hstate *h, | |
511 | struct mm_struct *mm, pte_t *pte) | |
512 | { | |
513 | return &mm->page_table_lock; | |
514 | } | |
af73e4d9 | 515 | #endif /* CONFIG_HUGETLB_PAGE */ |
a5516438 | 516 | |
cb900f41 KS |
517 | static inline spinlock_t *huge_pte_lock(struct hstate *h, |
518 | struct mm_struct *mm, pte_t *pte) | |
519 | { | |
520 | spinlock_t *ptl; | |
521 | ||
522 | ptl = huge_pte_lockptr(h, mm, pte); | |
523 | spin_lock(ptl); | |
524 | return ptl; | |
525 | } | |
526 | ||
1da177e4 | 527 | #endif /* _LINUX_HUGETLB_H */ |