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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
2 | #ifndef _LINUX_HUGETLB_H |
3 | #define _LINUX_HUGETLB_H | |
4 | ||
be93d8cf | 5 | #include <linux/mm_types.h> |
309381fe | 6 | #include <linux/mmdebug.h> |
4e950f6f | 7 | #include <linux/fs.h> |
8edf344c | 8 | #include <linux/hugetlb_inline.h> |
abb8206c | 9 | #include <linux/cgroup.h> |
9119a41e JK |
10 | #include <linux/list.h> |
11 | #include <linux/kref.h> | |
ca5999fd | 12 | #include <linux/pgtable.h> |
d92bbc27 | 13 | #include <linux/gfp.h> |
f6191471 | 14 | #include <linux/userfaultfd_k.h> |
4e950f6f | 15 | |
e9ea0e2d AM |
16 | struct ctl_table; |
17 | struct user_struct; | |
24669e58 | 18 | struct mmu_gather; |
e9ea0e2d | 19 | |
e2299292 | 20 | #ifndef is_hugepd |
e2299292 AK |
21 | typedef struct { unsigned long pd; } hugepd_t; |
22 | #define is_hugepd(hugepd) (0) | |
23 | #define __hugepd(x) ((hugepd_t) { (x) }) | |
e2299292 AK |
24 | #endif |
25 | ||
1da177e4 LT |
26 | #ifdef CONFIG_HUGETLB_PAGE |
27 | ||
28 | #include <linux/mempolicy.h> | |
516dffdc | 29 | #include <linux/shm.h> |
63551ae0 | 30 | #include <asm/tlbflush.h> |
1da177e4 | 31 | |
90481622 DG |
32 | struct hugepage_subpool { |
33 | spinlock_t lock; | |
34 | long count; | |
c6a91820 MK |
35 | long max_hpages; /* Maximum huge pages or -1 if no maximum. */ |
36 | long used_hpages; /* Used count against maximum, includes */ | |
37 | /* both alloced and reserved pages. */ | |
38 | struct hstate *hstate; | |
39 | long min_hpages; /* Minimum huge pages or -1 if no minimum. */ | |
40 | long rsv_hpages; /* Pages reserved against global pool to */ | |
6c26d310 | 41 | /* satisfy minimum size. */ |
90481622 DG |
42 | }; |
43 | ||
9119a41e JK |
44 | struct resv_map { |
45 | struct kref refs; | |
7b24d861 | 46 | spinlock_t lock; |
9119a41e | 47 | struct list_head regions; |
5e911373 MK |
48 | long adds_in_progress; |
49 | struct list_head region_cache; | |
50 | long region_cache_count; | |
e9fe92ae MA |
51 | #ifdef CONFIG_CGROUP_HUGETLB |
52 | /* | |
53 | * On private mappings, the counter to uncharge reservations is stored | |
54 | * here. If these fields are 0, then either the mapping is shared, or | |
55 | * cgroup accounting is disabled for this resv_map. | |
56 | */ | |
57 | struct page_counter *reservation_counter; | |
58 | unsigned long pages_per_hpage; | |
59 | struct cgroup_subsys_state *css; | |
60 | #endif | |
9119a41e | 61 | }; |
075a61d0 MA |
62 | |
63 | /* | |
64 | * Region tracking -- allows tracking of reservations and instantiated pages | |
65 | * across the pages in a mapping. | |
66 | * | |
67 | * The region data structures are embedded into a resv_map and protected | |
68 | * by a resv_map's lock. The set of regions within the resv_map represent | |
69 | * reservations for huge pages, or huge pages that have already been | |
70 | * instantiated within the map. The from and to elements are huge page | |
71 | * indicies into the associated mapping. from indicates the starting index | |
72 | * of the region. to represents the first index past the end of the region. | |
73 | * | |
74 | * For example, a file region structure with from == 0 and to == 4 represents | |
75 | * four huge pages in a mapping. It is important to note that the to element | |
76 | * represents the first element past the end of the region. This is used in | |
77 | * arithmetic as 4(to) - 0(from) = 4 huge pages in the region. | |
78 | * | |
79 | * Interval notation of the form [from, to) will be used to indicate that | |
80 | * the endpoint from is inclusive and to is exclusive. | |
81 | */ | |
82 | struct file_region { | |
83 | struct list_head link; | |
84 | long from; | |
85 | long to; | |
86 | #ifdef CONFIG_CGROUP_HUGETLB | |
87 | /* | |
88 | * On shared mappings, each reserved region appears as a struct | |
89 | * file_region in resv_map. These fields hold the info needed to | |
90 | * uncharge each reservation. | |
91 | */ | |
92 | struct page_counter *reservation_counter; | |
93 | struct cgroup_subsys_state *css; | |
94 | #endif | |
95 | }; | |
96 | ||
9119a41e JK |
97 | extern struct resv_map *resv_map_alloc(void); |
98 | void resv_map_release(struct kref *ref); | |
99 | ||
c3f38a38 AK |
100 | extern spinlock_t hugetlb_lock; |
101 | extern int hugetlb_max_hstate __read_mostly; | |
102 | #define for_each_hstate(h) \ | |
103 | for ((h) = hstates; (h) < &hstates[hugetlb_max_hstate]; (h)++) | |
104 | ||
7ca02d0a MK |
105 | struct hugepage_subpool *hugepage_new_subpool(struct hstate *h, long max_hpages, |
106 | long min_hpages); | |
90481622 DG |
107 | void hugepage_put_subpool(struct hugepage_subpool *spool); |
108 | ||
a1e78772 | 109 | void reset_vma_resv_huge_pages(struct vm_area_struct *vma); |
32927393 CH |
110 | int hugetlb_sysctl_handler(struct ctl_table *, int, void *, size_t *, loff_t *); |
111 | int hugetlb_overcommit_handler(struct ctl_table *, int, void *, size_t *, | |
112 | loff_t *); | |
113 | int hugetlb_treat_movable_handler(struct ctl_table *, int, void *, size_t *, | |
114 | loff_t *); | |
115 | int hugetlb_mempolicy_sysctl_handler(struct ctl_table *, int, void *, size_t *, | |
116 | loff_t *); | |
06808b08 | 117 | |
1da177e4 | 118 | int copy_hugetlb_page_range(struct mm_struct *, struct mm_struct *, struct vm_area_struct *); |
28a35716 ML |
119 | long follow_hugetlb_page(struct mm_struct *, struct vm_area_struct *, |
120 | struct page **, struct vm_area_struct **, | |
87ffc118 AA |
121 | unsigned long *, unsigned long *, long, unsigned int, |
122 | int *); | |
04f2cbe3 | 123 | void unmap_hugepage_range(struct vm_area_struct *, |
24669e58 | 124 | unsigned long, unsigned long, struct page *); |
d833352a MG |
125 | void __unmap_hugepage_range_final(struct mmu_gather *tlb, |
126 | struct vm_area_struct *vma, | |
127 | unsigned long start, unsigned long end, | |
128 | struct page *ref_page); | |
24669e58 AK |
129 | void __unmap_hugepage_range(struct mmu_gather *tlb, struct vm_area_struct *vma, |
130 | unsigned long start, unsigned long end, | |
131 | struct page *ref_page); | |
e1759c21 | 132 | void hugetlb_report_meminfo(struct seq_file *); |
7981593b | 133 | int hugetlb_report_node_meminfo(char *buf, int len, int nid); |
949f7ec5 | 134 | void hugetlb_show_meminfo(void); |
1da177e4 | 135 | unsigned long hugetlb_total_pages(void); |
2b740303 | 136 | vm_fault_t hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma, |
788c7df4 | 137 | unsigned long address, unsigned int flags); |
714c1891 | 138 | #ifdef CONFIG_USERFAULTFD |
8fb5debc MK |
139 | int hugetlb_mcopy_atomic_pte(struct mm_struct *dst_mm, pte_t *dst_pte, |
140 | struct vm_area_struct *dst_vma, | |
141 | unsigned long dst_addr, | |
142 | unsigned long src_addr, | |
f6191471 | 143 | enum mcopy_atomic_mode mode, |
8fb5debc | 144 | struct page **pagep); |
714c1891 | 145 | #endif /* CONFIG_USERFAULTFD */ |
33b8f84a | 146 | bool hugetlb_reserve_pages(struct inode *inode, long from, long to, |
5a6fe125 | 147 | struct vm_area_struct *vma, |
ca16d140 | 148 | vm_flags_t vm_flags); |
b5cec28d MK |
149 | long hugetlb_unreserve_pages(struct inode *inode, long start, long end, |
150 | long freed); | |
31caf665 | 151 | bool isolate_huge_page(struct page *page, struct list_head *list); |
25182f05 | 152 | int get_hwpoison_huge_page(struct page *page, bool *hugetlb); |
31caf665 | 153 | void putback_active_hugepage(struct page *page); |
ab5ac90a | 154 | void move_hugetlb_state(struct page *oldpage, struct page *newpage, int reason); |
8f1d26d0 | 155 | void free_huge_page(struct page *page); |
72e2936c | 156 | void hugetlb_fix_reserve_counts(struct inode *inode); |
c672c7f2 | 157 | extern struct mutex *hugetlb_fault_mutex_table; |
188b04a7 | 158 | u32 hugetlb_fault_mutex_hash(struct address_space *mapping, pgoff_t idx); |
1da177e4 | 159 | |
aec44e0f PX |
160 | pte_t *huge_pmd_share(struct mm_struct *mm, struct vm_area_struct *vma, |
161 | unsigned long addr, pud_t *pud); | |
3212b535 | 162 | |
c0d0381a MK |
163 | struct address_space *hugetlb_page_mapping_lock_write(struct page *hpage); |
164 | ||
1da177e4 | 165 | extern int sysctl_hugetlb_shm_group; |
53ba51d2 | 166 | extern struct list_head huge_boot_pages; |
1da177e4 | 167 | |
63551ae0 DG |
168 | /* arch callbacks */ |
169 | ||
aec44e0f | 170 | pte_t *huge_pte_alloc(struct mm_struct *mm, struct vm_area_struct *vma, |
a5516438 | 171 | unsigned long addr, unsigned long sz); |
7868a208 PA |
172 | pte_t *huge_pte_offset(struct mm_struct *mm, |
173 | unsigned long addr, unsigned long sz); | |
34ae204f MK |
174 | int huge_pmd_unshare(struct mm_struct *mm, struct vm_area_struct *vma, |
175 | unsigned long *addr, pte_t *ptep); | |
017b1660 MK |
176 | void adjust_range_if_pmd_sharing_possible(struct vm_area_struct *vma, |
177 | unsigned long *start, unsigned long *end); | |
63551ae0 DG |
178 | struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address, |
179 | int write); | |
4dc71451 AK |
180 | struct page *follow_huge_pd(struct vm_area_struct *vma, |
181 | unsigned long address, hugepd_t hpd, | |
182 | int flags, int pdshift); | |
63551ae0 | 183 | struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address, |
e66f17ff | 184 | pmd_t *pmd, int flags); |
ceb86879 | 185 | struct page *follow_huge_pud(struct mm_struct *mm, unsigned long address, |
e66f17ff | 186 | pud_t *pud, int flags); |
faaa5b62 AK |
187 | struct page *follow_huge_pgd(struct mm_struct *mm, unsigned long address, |
188 | pgd_t *pgd, int flags); | |
189 | ||
63551ae0 | 190 | int pmd_huge(pmd_t pmd); |
c2febafc | 191 | int pud_huge(pud_t pud); |
7da4d641 | 192 | unsigned long hugetlb_change_protection(struct vm_area_struct *vma, |
8f860591 | 193 | unsigned long address, unsigned long end, pgprot_t newprot); |
63551ae0 | 194 | |
d5ed7444 | 195 | bool is_hugetlb_entry_migration(pte_t pte); |
6dfeaff9 | 196 | void hugetlb_unshare_all_pmds(struct vm_area_struct *vma); |
ab5ac90a | 197 | |
1da177e4 LT |
198 | #else /* !CONFIG_HUGETLB_PAGE */ |
199 | ||
a1e78772 MG |
200 | static inline void reset_vma_resv_huge_pages(struct vm_area_struct *vma) |
201 | { | |
202 | } | |
203 | ||
1da177e4 LT |
204 | static inline unsigned long hugetlb_total_pages(void) |
205 | { | |
206 | return 0; | |
207 | } | |
208 | ||
c0d0381a MK |
209 | static inline struct address_space *hugetlb_page_mapping_lock_write( |
210 | struct page *hpage) | |
211 | { | |
212 | return NULL; | |
213 | } | |
214 | ||
34ae204f MK |
215 | static inline int huge_pmd_unshare(struct mm_struct *mm, |
216 | struct vm_area_struct *vma, | |
217 | unsigned long *addr, pte_t *ptep) | |
017b1660 MK |
218 | { |
219 | return 0; | |
220 | } | |
221 | ||
222 | static inline void adjust_range_if_pmd_sharing_possible( | |
223 | struct vm_area_struct *vma, | |
224 | unsigned long *start, unsigned long *end) | |
225 | { | |
226 | } | |
227 | ||
1f9dccb2 MK |
228 | static inline long follow_hugetlb_page(struct mm_struct *mm, |
229 | struct vm_area_struct *vma, struct page **pages, | |
230 | struct vm_area_struct **vmas, unsigned long *position, | |
231 | unsigned long *nr_pages, long i, unsigned int flags, | |
232 | int *nonblocking) | |
233 | { | |
234 | BUG(); | |
235 | return 0; | |
236 | } | |
237 | ||
238 | static inline struct page *follow_huge_addr(struct mm_struct *mm, | |
239 | unsigned long address, int write) | |
240 | { | |
241 | return ERR_PTR(-EINVAL); | |
242 | } | |
243 | ||
244 | static inline int copy_hugetlb_page_range(struct mm_struct *dst, | |
245 | struct mm_struct *src, struct vm_area_struct *vma) | |
246 | { | |
247 | BUG(); | |
248 | return 0; | |
249 | } | |
250 | ||
e1759c21 AD |
251 | static inline void hugetlb_report_meminfo(struct seq_file *m) |
252 | { | |
253 | } | |
1f9dccb2 | 254 | |
7981593b | 255 | static inline int hugetlb_report_node_meminfo(char *buf, int len, int nid) |
1f9dccb2 MK |
256 | { |
257 | return 0; | |
258 | } | |
259 | ||
949f7ec5 DR |
260 | static inline void hugetlb_show_meminfo(void) |
261 | { | |
262 | } | |
1f9dccb2 MK |
263 | |
264 | static inline struct page *follow_huge_pd(struct vm_area_struct *vma, | |
265 | unsigned long address, hugepd_t hpd, int flags, | |
266 | int pdshift) | |
267 | { | |
268 | return NULL; | |
269 | } | |
270 | ||
271 | static inline struct page *follow_huge_pmd(struct mm_struct *mm, | |
272 | unsigned long address, pmd_t *pmd, int flags) | |
273 | { | |
274 | return NULL; | |
275 | } | |
276 | ||
277 | static inline struct page *follow_huge_pud(struct mm_struct *mm, | |
278 | unsigned long address, pud_t *pud, int flags) | |
279 | { | |
280 | return NULL; | |
281 | } | |
282 | ||
283 | static inline struct page *follow_huge_pgd(struct mm_struct *mm, | |
284 | unsigned long address, pgd_t *pgd, int flags) | |
285 | { | |
286 | return NULL; | |
287 | } | |
288 | ||
289 | static inline int prepare_hugepage_range(struct file *file, | |
290 | unsigned long addr, unsigned long len) | |
291 | { | |
292 | return -EINVAL; | |
293 | } | |
294 | ||
295 | static inline int pmd_huge(pmd_t pmd) | |
296 | { | |
297 | return 0; | |
298 | } | |
299 | ||
300 | static inline int pud_huge(pud_t pud) | |
301 | { | |
302 | return 0; | |
303 | } | |
304 | ||
305 | static inline int is_hugepage_only_range(struct mm_struct *mm, | |
306 | unsigned long addr, unsigned long len) | |
307 | { | |
308 | return 0; | |
309 | } | |
310 | ||
311 | static inline void hugetlb_free_pgd_range(struct mmu_gather *tlb, | |
312 | unsigned long addr, unsigned long end, | |
313 | unsigned long floor, unsigned long ceiling) | |
314 | { | |
315 | BUG(); | |
316 | } | |
317 | ||
714c1891 | 318 | #ifdef CONFIG_USERFAULTFD |
1f9dccb2 MK |
319 | static inline int hugetlb_mcopy_atomic_pte(struct mm_struct *dst_mm, |
320 | pte_t *dst_pte, | |
321 | struct vm_area_struct *dst_vma, | |
322 | unsigned long dst_addr, | |
323 | unsigned long src_addr, | |
f6191471 | 324 | enum mcopy_atomic_mode mode, |
1f9dccb2 MK |
325 | struct page **pagep) |
326 | { | |
327 | BUG(); | |
328 | return 0; | |
329 | } | |
714c1891 | 330 | #endif /* CONFIG_USERFAULTFD */ |
1f9dccb2 MK |
331 | |
332 | static inline pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr, | |
333 | unsigned long sz) | |
334 | { | |
335 | return NULL; | |
336 | } | |
24669e58 | 337 | |
f40386a4 NH |
338 | static inline bool isolate_huge_page(struct page *page, struct list_head *list) |
339 | { | |
340 | return false; | |
341 | } | |
1da177e4 | 342 | |
25182f05 NH |
343 | static inline int get_hwpoison_huge_page(struct page *page, bool *hugetlb) |
344 | { | |
345 | return 0; | |
346 | } | |
347 | ||
1f9dccb2 MK |
348 | static inline void putback_active_hugepage(struct page *page) |
349 | { | |
350 | } | |
351 | ||
352 | static inline void move_hugetlb_state(struct page *oldpage, | |
353 | struct page *newpage, int reason) | |
354 | { | |
355 | } | |
356 | ||
357 | static inline unsigned long hugetlb_change_protection( | |
358 | struct vm_area_struct *vma, unsigned long address, | |
359 | unsigned long end, pgprot_t newprot) | |
7da4d641 PZ |
360 | { |
361 | return 0; | |
362 | } | |
8f860591 | 363 | |
d833352a MG |
364 | static inline void __unmap_hugepage_range_final(struct mmu_gather *tlb, |
365 | struct vm_area_struct *vma, unsigned long start, | |
366 | unsigned long end, struct page *ref_page) | |
367 | { | |
368 | BUG(); | |
369 | } | |
370 | ||
24669e58 AK |
371 | static inline void __unmap_hugepage_range(struct mmu_gather *tlb, |
372 | struct vm_area_struct *vma, unsigned long start, | |
373 | unsigned long end, struct page *ref_page) | |
374 | { | |
375 | BUG(); | |
376 | } | |
1f9dccb2 | 377 | |
a953e772 | 378 | static inline vm_fault_t hugetlb_fault(struct mm_struct *mm, |
1f9dccb2 MK |
379 | struct vm_area_struct *vma, unsigned long address, |
380 | unsigned int flags) | |
a953e772 SJ |
381 | { |
382 | BUG(); | |
383 | return 0; | |
384 | } | |
24669e58 | 385 | |
6dfeaff9 PX |
386 | static inline void hugetlb_unshare_all_pmds(struct vm_area_struct *vma) { } |
387 | ||
1da177e4 | 388 | #endif /* !CONFIG_HUGETLB_PAGE */ |
f30c59e9 AK |
389 | /* |
390 | * hugepages at page global directory. If arch support | |
391 | * hugepages at pgd level, they need to define this. | |
392 | */ | |
393 | #ifndef pgd_huge | |
394 | #define pgd_huge(x) 0 | |
395 | #endif | |
c2febafc KS |
396 | #ifndef p4d_huge |
397 | #define p4d_huge(x) 0 | |
398 | #endif | |
f30c59e9 AK |
399 | |
400 | #ifndef pgd_write | |
401 | static inline int pgd_write(pgd_t pgd) | |
402 | { | |
403 | BUG(); | |
404 | return 0; | |
405 | } | |
406 | #endif | |
407 | ||
4e52780d EM |
408 | #define HUGETLB_ANON_FILE "anon_hugepage" |
409 | ||
6bfde05b EM |
410 | enum { |
411 | /* | |
412 | * The file will be used as an shm file so shmfs accounting rules | |
413 | * apply | |
414 | */ | |
415 | HUGETLB_SHMFS_INODE = 1, | |
4e52780d EM |
416 | /* |
417 | * The file is being created on the internal vfs mount and shmfs | |
418 | * accounting rules do not apply | |
419 | */ | |
420 | HUGETLB_ANONHUGE_INODE = 2, | |
6bfde05b EM |
421 | }; |
422 | ||
1da177e4 | 423 | #ifdef CONFIG_HUGETLBFS |
1da177e4 | 424 | struct hugetlbfs_sb_info { |
1da177e4 LT |
425 | long max_inodes; /* inodes allowed */ |
426 | long free_inodes; /* inodes free */ | |
427 | spinlock_t stat_lock; | |
a137e1cc | 428 | struct hstate *hstate; |
90481622 | 429 | struct hugepage_subpool *spool; |
4a25220d DH |
430 | kuid_t uid; |
431 | kgid_t gid; | |
432 | umode_t mode; | |
1da177e4 LT |
433 | }; |
434 | ||
1da177e4 LT |
435 | static inline struct hugetlbfs_sb_info *HUGETLBFS_SB(struct super_block *sb) |
436 | { | |
437 | return sb->s_fs_info; | |
438 | } | |
439 | ||
da14c1e5 MAL |
440 | struct hugetlbfs_inode_info { |
441 | struct shared_policy policy; | |
442 | struct inode vfs_inode; | |
ff62a342 | 443 | unsigned int seals; |
da14c1e5 MAL |
444 | }; |
445 | ||
446 | static inline struct hugetlbfs_inode_info *HUGETLBFS_I(struct inode *inode) | |
447 | { | |
448 | return container_of(inode, struct hugetlbfs_inode_info, vfs_inode); | |
449 | } | |
450 | ||
4b6f5d20 | 451 | extern const struct file_operations hugetlbfs_file_operations; |
f0f37e2f | 452 | extern const struct vm_operations_struct hugetlb_vm_ops; |
af73e4d9 | 453 | struct file *hugetlb_file_setup(const char *name, size_t size, vm_flags_t acct, |
42d7395f AK |
454 | struct user_struct **user, int creat_flags, |
455 | int page_size_log); | |
1da177e4 | 456 | |
719ff321 | 457 | static inline bool is_file_hugepages(struct file *file) |
1da177e4 | 458 | { |
516dffdc | 459 | if (file->f_op == &hugetlbfs_file_operations) |
719ff321 | 460 | return true; |
516dffdc | 461 | |
719ff321 | 462 | return is_file_shm_hugepages(file); |
1da177e4 LT |
463 | } |
464 | ||
bb297bb2 CL |
465 | static inline struct hstate *hstate_inode(struct inode *i) |
466 | { | |
467 | return HUGETLBFS_SB(i->i_sb)->hstate; | |
468 | } | |
1da177e4 LT |
469 | #else /* !CONFIG_HUGETLBFS */ |
470 | ||
719ff321 | 471 | #define is_file_hugepages(file) false |
40716e29 | 472 | static inline struct file * |
af73e4d9 NH |
473 | hugetlb_file_setup(const char *name, size_t size, vm_flags_t acctflag, |
474 | struct user_struct **user, int creat_flags, | |
42d7395f | 475 | int page_size_log) |
e9ea0e2d AM |
476 | { |
477 | return ERR_PTR(-ENOSYS); | |
478 | } | |
1da177e4 | 479 | |
bb297bb2 CL |
480 | static inline struct hstate *hstate_inode(struct inode *i) |
481 | { | |
482 | return NULL; | |
483 | } | |
1da177e4 LT |
484 | #endif /* !CONFIG_HUGETLBFS */ |
485 | ||
d2ba27e8 AB |
486 | #ifdef HAVE_ARCH_HUGETLB_UNMAPPED_AREA |
487 | unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr, | |
488 | unsigned long len, unsigned long pgoff, | |
489 | unsigned long flags); | |
490 | #endif /* HAVE_ARCH_HUGETLB_UNMAPPED_AREA */ | |
491 | ||
d6995da3 MK |
492 | /* |
493 | * huegtlb page specific state flags. These flags are located in page.private | |
494 | * of the hugetlb head page. Functions created via the below macros should be | |
495 | * used to manipulate these flags. | |
496 | * | |
497 | * HPG_restore_reserve - Set when a hugetlb page consumes a reservation at | |
498 | * allocation time. Cleared when page is fully instantiated. Free | |
499 | * routine checks flag to restore a reservation on error paths. | |
d95c0337 MK |
500 | * Synchronization: Examined or modified by code that knows it has |
501 | * the only reference to page. i.e. After allocation but before use | |
502 | * or when the page is being freed. | |
8f251a3d MK |
503 | * HPG_migratable - Set after a newly allocated page is added to the page |
504 | * cache and/or page tables. Indicates the page is a candidate for | |
505 | * migration. | |
d95c0337 MK |
506 | * Synchronization: Initially set after new page allocation with no |
507 | * locking. When examined and modified during migration processing | |
508 | * (isolate, migrate, putback) the hugetlb_lock is held. | |
9157c311 MK |
509 | * HPG_temporary - - Set on a page that is temporarily allocated from the buddy |
510 | * allocator. Typically used for migration target pages when no pages | |
511 | * are available in the pool. The hugetlb free page path will | |
512 | * immediately free pages with this flag set to the buddy allocator. | |
d95c0337 MK |
513 | * Synchronization: Can be set after huge page allocation from buddy when |
514 | * code knows it has only reference. All other examinations and | |
515 | * modifications require hugetlb_lock. | |
6c037149 | 516 | * HPG_freed - Set when page is on the free lists. |
d95c0337 | 517 | * Synchronization: hugetlb_lock held for examination and modification. |
d6995da3 MK |
518 | */ |
519 | enum hugetlb_page_flags { | |
520 | HPG_restore_reserve = 0, | |
8f251a3d | 521 | HPG_migratable, |
9157c311 | 522 | HPG_temporary, |
6c037149 | 523 | HPG_freed, |
d6995da3 MK |
524 | __NR_HPAGEFLAGS, |
525 | }; | |
526 | ||
527 | /* | |
528 | * Macros to create test, set and clear function definitions for | |
529 | * hugetlb specific page flags. | |
530 | */ | |
531 | #ifdef CONFIG_HUGETLB_PAGE | |
532 | #define TESTHPAGEFLAG(uname, flname) \ | |
533 | static inline int HPage##uname(struct page *page) \ | |
534 | { return test_bit(HPG_##flname, &(page->private)); } | |
535 | ||
536 | #define SETHPAGEFLAG(uname, flname) \ | |
537 | static inline void SetHPage##uname(struct page *page) \ | |
538 | { set_bit(HPG_##flname, &(page->private)); } | |
539 | ||
540 | #define CLEARHPAGEFLAG(uname, flname) \ | |
541 | static inline void ClearHPage##uname(struct page *page) \ | |
542 | { clear_bit(HPG_##flname, &(page->private)); } | |
543 | #else | |
544 | #define TESTHPAGEFLAG(uname, flname) \ | |
545 | static inline int HPage##uname(struct page *page) \ | |
546 | { return 0; } | |
547 | ||
548 | #define SETHPAGEFLAG(uname, flname) \ | |
549 | static inline void SetHPage##uname(struct page *page) \ | |
550 | { } | |
551 | ||
552 | #define CLEARHPAGEFLAG(uname, flname) \ | |
553 | static inline void ClearHPage##uname(struct page *page) \ | |
554 | { } | |
555 | #endif | |
556 | ||
557 | #define HPAGEFLAG(uname, flname) \ | |
558 | TESTHPAGEFLAG(uname, flname) \ | |
559 | SETHPAGEFLAG(uname, flname) \ | |
560 | CLEARHPAGEFLAG(uname, flname) \ | |
561 | ||
562 | /* | |
563 | * Create functions associated with hugetlb page flags | |
564 | */ | |
565 | HPAGEFLAG(RestoreReserve, restore_reserve) | |
8f251a3d | 566 | HPAGEFLAG(Migratable, migratable) |
9157c311 | 567 | HPAGEFLAG(Temporary, temporary) |
6c037149 | 568 | HPAGEFLAG(Freed, freed) |
d6995da3 | 569 | |
a5516438 AK |
570 | #ifdef CONFIG_HUGETLB_PAGE |
571 | ||
a3437870 | 572 | #define HSTATE_NAME_LEN 32 |
a5516438 AK |
573 | /* Defines one hugetlb page size */ |
574 | struct hstate { | |
29383967 | 575 | struct mutex resize_lock; |
e8c5c824 LS |
576 | int next_nid_to_alloc; |
577 | int next_nid_to_free; | |
a5516438 AK |
578 | unsigned int order; |
579 | unsigned long mask; | |
580 | unsigned long max_huge_pages; | |
581 | unsigned long nr_huge_pages; | |
582 | unsigned long free_huge_pages; | |
583 | unsigned long resv_huge_pages; | |
584 | unsigned long surplus_huge_pages; | |
585 | unsigned long nr_overcommit_huge_pages; | |
0edaecfa | 586 | struct list_head hugepage_activelist; |
a5516438 AK |
587 | struct list_head hugepage_freelists[MAX_NUMNODES]; |
588 | unsigned int nr_huge_pages_node[MAX_NUMNODES]; | |
589 | unsigned int free_huge_pages_node[MAX_NUMNODES]; | |
590 | unsigned int surplus_huge_pages_node[MAX_NUMNODES]; | |
abb8206c AK |
591 | #ifdef CONFIG_CGROUP_HUGETLB |
592 | /* cgroup control files */ | |
cdc2fcfe MA |
593 | struct cftype cgroup_files_dfl[7]; |
594 | struct cftype cgroup_files_legacy[9]; | |
abb8206c | 595 | #endif |
a3437870 | 596 | char name[HSTATE_NAME_LEN]; |
a5516438 AK |
597 | }; |
598 | ||
53ba51d2 JT |
599 | struct huge_bootmem_page { |
600 | struct list_head list; | |
601 | struct hstate *hstate; | |
602 | }; | |
603 | ||
ae37c7ff | 604 | int isolate_or_dissolve_huge_page(struct page *page, struct list_head *list); |
70c3547e MK |
605 | struct page *alloc_huge_page(struct vm_area_struct *vma, |
606 | unsigned long addr, int avoid_reserve); | |
3e59fcb0 | 607 | struct page *alloc_huge_page_nodemask(struct hstate *h, int preferred_nid, |
d92bbc27 | 608 | nodemask_t *nmask, gfp_t gfp_mask); |
389c8178 MH |
609 | struct page *alloc_huge_page_vma(struct hstate *h, struct vm_area_struct *vma, |
610 | unsigned long address); | |
ab76ad54 MK |
611 | int huge_add_to_page_cache(struct page *page, struct address_space *mapping, |
612 | pgoff_t idx); | |
bf50bab2 | 613 | |
53ba51d2 | 614 | /* arch callback */ |
e24a1307 | 615 | int __init __alloc_bootmem_huge_page(struct hstate *h); |
53ba51d2 JT |
616 | int __init alloc_bootmem_huge_page(struct hstate *h); |
617 | ||
e5ff2159 | 618 | void __init hugetlb_add_hstate(unsigned order); |
ae94da89 | 619 | bool __init arch_hugetlb_valid_size(unsigned long size); |
e5ff2159 AK |
620 | struct hstate *size_to_hstate(unsigned long size); |
621 | ||
622 | #ifndef HUGE_MAX_HSTATE | |
623 | #define HUGE_MAX_HSTATE 1 | |
624 | #endif | |
625 | ||
626 | extern struct hstate hstates[HUGE_MAX_HSTATE]; | |
627 | extern unsigned int default_hstate_idx; | |
628 | ||
629 | #define default_hstate (hstates[default_hstate_idx]) | |
a5516438 | 630 | |
d6995da3 MK |
631 | /* |
632 | * hugetlb page subpool pointer located in hpage[1].private | |
633 | */ | |
634 | static inline struct hugepage_subpool *hugetlb_page_subpool(struct page *hpage) | |
635 | { | |
636 | return (struct hugepage_subpool *)(hpage+1)->private; | |
637 | } | |
638 | ||
639 | static inline void hugetlb_set_page_subpool(struct page *hpage, | |
640 | struct hugepage_subpool *subpool) | |
641 | { | |
642 | set_page_private(hpage+1, (unsigned long)subpool); | |
643 | } | |
644 | ||
a5516438 AK |
645 | static inline struct hstate *hstate_file(struct file *f) |
646 | { | |
496ad9aa | 647 | return hstate_inode(file_inode(f)); |
a5516438 AK |
648 | } |
649 | ||
af73e4d9 NH |
650 | static inline struct hstate *hstate_sizelog(int page_size_log) |
651 | { | |
652 | if (!page_size_log) | |
653 | return &default_hstate; | |
97ad2be1 SL |
654 | |
655 | return size_to_hstate(1UL << page_size_log); | |
af73e4d9 NH |
656 | } |
657 | ||
a137e1cc | 658 | static inline struct hstate *hstate_vma(struct vm_area_struct *vma) |
a5516438 | 659 | { |
a137e1cc | 660 | return hstate_file(vma->vm_file); |
a5516438 AK |
661 | } |
662 | ||
663 | static inline unsigned long huge_page_size(struct hstate *h) | |
664 | { | |
665 | return (unsigned long)PAGE_SIZE << h->order; | |
666 | } | |
667 | ||
08fba699 MG |
668 | extern unsigned long vma_kernel_pagesize(struct vm_area_struct *vma); |
669 | ||
3340289d MG |
670 | extern unsigned long vma_mmu_pagesize(struct vm_area_struct *vma); |
671 | ||
a5516438 AK |
672 | static inline unsigned long huge_page_mask(struct hstate *h) |
673 | { | |
674 | return h->mask; | |
675 | } | |
676 | ||
677 | static inline unsigned int huge_page_order(struct hstate *h) | |
678 | { | |
679 | return h->order; | |
680 | } | |
681 | ||
682 | static inline unsigned huge_page_shift(struct hstate *h) | |
683 | { | |
684 | return h->order + PAGE_SHIFT; | |
685 | } | |
686 | ||
bae7f4ae LC |
687 | static inline bool hstate_is_gigantic(struct hstate *h) |
688 | { | |
689 | return huge_page_order(h) >= MAX_ORDER; | |
690 | } | |
691 | ||
a5516438 AK |
692 | static inline unsigned int pages_per_huge_page(struct hstate *h) |
693 | { | |
694 | return 1 << h->order; | |
695 | } | |
696 | ||
697 | static inline unsigned int blocks_per_huge_page(struct hstate *h) | |
698 | { | |
699 | return huge_page_size(h) / 512; | |
700 | } | |
701 | ||
702 | #include <asm/hugetlb.h> | |
703 | ||
b0eae98c AK |
704 | #ifndef is_hugepage_only_range |
705 | static inline int is_hugepage_only_range(struct mm_struct *mm, | |
706 | unsigned long addr, unsigned long len) | |
707 | { | |
708 | return 0; | |
709 | } | |
710 | #define is_hugepage_only_range is_hugepage_only_range | |
711 | #endif | |
712 | ||
5be99343 AK |
713 | #ifndef arch_clear_hugepage_flags |
714 | static inline void arch_clear_hugepage_flags(struct page *page) { } | |
715 | #define arch_clear_hugepage_flags arch_clear_hugepage_flags | |
716 | #endif | |
717 | ||
d9ed9faa CM |
718 | #ifndef arch_make_huge_pte |
719 | static inline pte_t arch_make_huge_pte(pte_t entry, struct vm_area_struct *vma, | |
720 | struct page *page, int writable) | |
721 | { | |
722 | return entry; | |
723 | } | |
724 | #endif | |
725 | ||
e5ff2159 AK |
726 | static inline struct hstate *page_hstate(struct page *page) |
727 | { | |
309381fe | 728 | VM_BUG_ON_PAGE(!PageHuge(page), page); |
a50b854e | 729 | return size_to_hstate(page_size(page)); |
e5ff2159 AK |
730 | } |
731 | ||
aa50d3a7 AK |
732 | static inline unsigned hstate_index_to_shift(unsigned index) |
733 | { | |
734 | return hstates[index].order + PAGE_SHIFT; | |
735 | } | |
736 | ||
972dc4de AK |
737 | static inline int hstate_index(struct hstate *h) |
738 | { | |
739 | return h - hstates; | |
740 | } | |
741 | ||
13d60f4b ZY |
742 | pgoff_t __basepage_index(struct page *page); |
743 | ||
744 | /* Return page->index in PAGE_SIZE units */ | |
745 | static inline pgoff_t basepage_index(struct page *page) | |
746 | { | |
747 | if (!PageCompound(page)) | |
748 | return page->index; | |
749 | ||
750 | return __basepage_index(page); | |
751 | } | |
752 | ||
c3114a84 | 753 | extern int dissolve_free_huge_page(struct page *page); |
082d5b6b GS |
754 | extern int dissolve_free_huge_pages(unsigned long start_pfn, |
755 | unsigned long end_pfn); | |
e693de18 | 756 | |
c177c81e | 757 | #ifdef CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION |
e693de18 AK |
758 | #ifndef arch_hugetlb_migration_supported |
759 | static inline bool arch_hugetlb_migration_supported(struct hstate *h) | |
760 | { | |
94310cbc | 761 | if ((huge_page_shift(h) == PMD_SHIFT) || |
9b553bf5 AK |
762 | (huge_page_shift(h) == PUD_SHIFT) || |
763 | (huge_page_shift(h) == PGDIR_SHIFT)) | |
94310cbc AK |
764 | return true; |
765 | else | |
766 | return false; | |
e693de18 AK |
767 | } |
768 | #endif | |
c177c81e | 769 | #else |
e693de18 AK |
770 | static inline bool arch_hugetlb_migration_supported(struct hstate *h) |
771 | { | |
d70c17d4 | 772 | return false; |
e693de18 | 773 | } |
c177c81e | 774 | #endif |
e693de18 AK |
775 | |
776 | static inline bool hugepage_migration_supported(struct hstate *h) | |
777 | { | |
778 | return arch_hugetlb_migration_supported(h); | |
83467efb | 779 | } |
c8721bbb | 780 | |
7ed2c31d AK |
781 | /* |
782 | * Movability check is different as compared to migration check. | |
783 | * It determines whether or not a huge page should be placed on | |
784 | * movable zone or not. Movability of any huge page should be | |
785 | * required only if huge page size is supported for migration. | |
786 | * There wont be any reason for the huge page to be movable if | |
787 | * it is not migratable to start with. Also the size of the huge | |
788 | * page should be large enough to be placed under a movable zone | |
789 | * and still feasible enough to be migratable. Just the presence | |
790 | * in movable zone does not make the migration feasible. | |
791 | * | |
792 | * So even though large huge page sizes like the gigantic ones | |
793 | * are migratable they should not be movable because its not | |
794 | * feasible to migrate them from movable zone. | |
795 | */ | |
796 | static inline bool hugepage_movable_supported(struct hstate *h) | |
797 | { | |
798 | if (!hugepage_migration_supported(h)) | |
799 | return false; | |
800 | ||
801 | if (hstate_is_gigantic(h)) | |
802 | return false; | |
803 | return true; | |
804 | } | |
805 | ||
d92bbc27 JK |
806 | /* Movability of hugepages depends on migration support. */ |
807 | static inline gfp_t htlb_alloc_mask(struct hstate *h) | |
808 | { | |
809 | if (hugepage_movable_supported(h)) | |
810 | return GFP_HIGHUSER_MOVABLE; | |
811 | else | |
812 | return GFP_HIGHUSER; | |
813 | } | |
814 | ||
19fc7bed JK |
815 | static inline gfp_t htlb_modify_alloc_mask(struct hstate *h, gfp_t gfp_mask) |
816 | { | |
817 | gfp_t modified_mask = htlb_alloc_mask(h); | |
818 | ||
819 | /* Some callers might want to enforce node */ | |
820 | modified_mask |= (gfp_mask & __GFP_THISNODE); | |
821 | ||
41b4dc14 JK |
822 | modified_mask |= (gfp_mask & __GFP_NOWARN); |
823 | ||
19fc7bed JK |
824 | return modified_mask; |
825 | } | |
826 | ||
cb900f41 KS |
827 | static inline spinlock_t *huge_pte_lockptr(struct hstate *h, |
828 | struct mm_struct *mm, pte_t *pte) | |
829 | { | |
830 | if (huge_page_size(h) == PMD_SIZE) | |
831 | return pmd_lockptr(mm, (pmd_t *) pte); | |
832 | VM_BUG_ON(huge_page_size(h) == PAGE_SIZE); | |
833 | return &mm->page_table_lock; | |
834 | } | |
835 | ||
2531c8cf DD |
836 | #ifndef hugepages_supported |
837 | /* | |
838 | * Some platform decide whether they support huge pages at boot | |
839 | * time. Some of them, such as powerpc, set HPAGE_SHIFT to 0 | |
840 | * when there is no such support | |
841 | */ | |
842 | #define hugepages_supported() (HPAGE_SHIFT != 0) | |
843 | #endif | |
457c1b27 | 844 | |
5d317b2b NH |
845 | void hugetlb_report_usage(struct seq_file *m, struct mm_struct *mm); |
846 | ||
847 | static inline void hugetlb_count_add(long l, struct mm_struct *mm) | |
848 | { | |
849 | atomic_long_add(l, &mm->hugetlb_usage); | |
850 | } | |
851 | ||
852 | static inline void hugetlb_count_sub(long l, struct mm_struct *mm) | |
853 | { | |
854 | atomic_long_sub(l, &mm->hugetlb_usage); | |
855 | } | |
e5251fd4 PA |
856 | |
857 | #ifndef set_huge_swap_pte_at | |
858 | static inline void set_huge_swap_pte_at(struct mm_struct *mm, unsigned long addr, | |
859 | pte_t *ptep, pte_t pte, unsigned long sz) | |
860 | { | |
861 | set_huge_pte_at(mm, addr, ptep, pte); | |
862 | } | |
863 | #endif | |
023bdd00 AK |
864 | |
865 | #ifndef huge_ptep_modify_prot_start | |
866 | #define huge_ptep_modify_prot_start huge_ptep_modify_prot_start | |
867 | static inline pte_t huge_ptep_modify_prot_start(struct vm_area_struct *vma, | |
868 | unsigned long addr, pte_t *ptep) | |
869 | { | |
870 | return huge_ptep_get_and_clear(vma->vm_mm, addr, ptep); | |
871 | } | |
872 | #endif | |
873 | ||
874 | #ifndef huge_ptep_modify_prot_commit | |
875 | #define huge_ptep_modify_prot_commit huge_ptep_modify_prot_commit | |
876 | static inline void huge_ptep_modify_prot_commit(struct vm_area_struct *vma, | |
877 | unsigned long addr, pte_t *ptep, | |
878 | pte_t old_pte, pte_t pte) | |
879 | { | |
880 | set_huge_pte_at(vma->vm_mm, addr, ptep, pte); | |
881 | } | |
882 | #endif | |
883 | ||
af73e4d9 | 884 | #else /* CONFIG_HUGETLB_PAGE */ |
a5516438 | 885 | struct hstate {}; |
442a5a9a | 886 | |
ae37c7ff OS |
887 | static inline int isolate_or_dissolve_huge_page(struct page *page, |
888 | struct list_head *list) | |
369fa227 OS |
889 | { |
890 | return -ENOMEM; | |
891 | } | |
892 | ||
442a5a9a JG |
893 | static inline struct page *alloc_huge_page(struct vm_area_struct *vma, |
894 | unsigned long addr, | |
895 | int avoid_reserve) | |
896 | { | |
897 | return NULL; | |
898 | } | |
899 | ||
442a5a9a | 900 | static inline struct page * |
d92bbc27 JK |
901 | alloc_huge_page_nodemask(struct hstate *h, int preferred_nid, |
902 | nodemask_t *nmask, gfp_t gfp_mask) | |
442a5a9a JG |
903 | { |
904 | return NULL; | |
905 | } | |
906 | ||
907 | static inline struct page *alloc_huge_page_vma(struct hstate *h, | |
908 | struct vm_area_struct *vma, | |
909 | unsigned long address) | |
910 | { | |
911 | return NULL; | |
912 | } | |
913 | ||
914 | static inline int __alloc_bootmem_huge_page(struct hstate *h) | |
915 | { | |
916 | return 0; | |
917 | } | |
918 | ||
919 | static inline struct hstate *hstate_file(struct file *f) | |
920 | { | |
921 | return NULL; | |
922 | } | |
923 | ||
924 | static inline struct hstate *hstate_sizelog(int page_size_log) | |
925 | { | |
926 | return NULL; | |
927 | } | |
928 | ||
929 | static inline struct hstate *hstate_vma(struct vm_area_struct *vma) | |
930 | { | |
931 | return NULL; | |
442a5a9a JG |
932 | } |
933 | ||
934 | static inline struct hstate *page_hstate(struct page *page) | |
935 | { | |
936 | return NULL; | |
937 | } | |
938 | ||
939 | static inline unsigned long huge_page_size(struct hstate *h) | |
940 | { | |
941 | return PAGE_SIZE; | |
942 | } | |
943 | ||
944 | static inline unsigned long huge_page_mask(struct hstate *h) | |
945 | { | |
946 | return PAGE_MASK; | |
947 | } | |
948 | ||
949 | static inline unsigned long vma_kernel_pagesize(struct vm_area_struct *vma) | |
950 | { | |
951 | return PAGE_SIZE; | |
952 | } | |
953 | ||
954 | static inline unsigned long vma_mmu_pagesize(struct vm_area_struct *vma) | |
955 | { | |
956 | return PAGE_SIZE; | |
957 | } | |
958 | ||
959 | static inline unsigned int huge_page_order(struct hstate *h) | |
960 | { | |
961 | return 0; | |
962 | } | |
963 | ||
964 | static inline unsigned int huge_page_shift(struct hstate *h) | |
965 | { | |
966 | return PAGE_SHIFT; | |
967 | } | |
968 | ||
94310cbc AK |
969 | static inline bool hstate_is_gigantic(struct hstate *h) |
970 | { | |
971 | return false; | |
972 | } | |
973 | ||
510a35d4 AR |
974 | static inline unsigned int pages_per_huge_page(struct hstate *h) |
975 | { | |
976 | return 1; | |
977 | } | |
c3114a84 AK |
978 | |
979 | static inline unsigned hstate_index_to_shift(unsigned index) | |
980 | { | |
981 | return 0; | |
982 | } | |
983 | ||
984 | static inline int hstate_index(struct hstate *h) | |
985 | { | |
986 | return 0; | |
987 | } | |
13d60f4b ZY |
988 | |
989 | static inline pgoff_t basepage_index(struct page *page) | |
990 | { | |
991 | return page->index; | |
992 | } | |
c3114a84 AK |
993 | |
994 | static inline int dissolve_free_huge_page(struct page *page) | |
995 | { | |
996 | return 0; | |
997 | } | |
998 | ||
999 | static inline int dissolve_free_huge_pages(unsigned long start_pfn, | |
1000 | unsigned long end_pfn) | |
1001 | { | |
1002 | return 0; | |
1003 | } | |
1004 | ||
1005 | static inline bool hugepage_migration_supported(struct hstate *h) | |
1006 | { | |
1007 | return false; | |
1008 | } | |
cb900f41 | 1009 | |
7ed2c31d AK |
1010 | static inline bool hugepage_movable_supported(struct hstate *h) |
1011 | { | |
1012 | return false; | |
1013 | } | |
1014 | ||
d92bbc27 JK |
1015 | static inline gfp_t htlb_alloc_mask(struct hstate *h) |
1016 | { | |
1017 | return 0; | |
1018 | } | |
1019 | ||
19fc7bed JK |
1020 | static inline gfp_t htlb_modify_alloc_mask(struct hstate *h, gfp_t gfp_mask) |
1021 | { | |
1022 | return 0; | |
1023 | } | |
1024 | ||
cb900f41 KS |
1025 | static inline spinlock_t *huge_pte_lockptr(struct hstate *h, |
1026 | struct mm_struct *mm, pte_t *pte) | |
1027 | { | |
1028 | return &mm->page_table_lock; | |
1029 | } | |
5d317b2b NH |
1030 | |
1031 | static inline void hugetlb_report_usage(struct seq_file *f, struct mm_struct *m) | |
1032 | { | |
1033 | } | |
1034 | ||
1035 | static inline void hugetlb_count_sub(long l, struct mm_struct *mm) | |
1036 | { | |
1037 | } | |
e5251fd4 PA |
1038 | |
1039 | static inline void set_huge_swap_pte_at(struct mm_struct *mm, unsigned long addr, | |
1040 | pte_t *ptep, pte_t pte, unsigned long sz) | |
1041 | { | |
1042 | } | |
af73e4d9 | 1043 | #endif /* CONFIG_HUGETLB_PAGE */ |
a5516438 | 1044 | |
cb900f41 KS |
1045 | static inline spinlock_t *huge_pte_lock(struct hstate *h, |
1046 | struct mm_struct *mm, pte_t *pte) | |
1047 | { | |
1048 | spinlock_t *ptl; | |
1049 | ||
1050 | ptl = huge_pte_lockptr(h, mm, pte); | |
1051 | spin_lock(ptl); | |
1052 | return ptl; | |
1053 | } | |
1054 | ||
cf11e85f RG |
1055 | #if defined(CONFIG_HUGETLB_PAGE) && defined(CONFIG_CMA) |
1056 | extern void __init hugetlb_cma_reserve(int order); | |
1057 | extern void __init hugetlb_cma_check(void); | |
1058 | #else | |
1059 | static inline __init void hugetlb_cma_reserve(int order) | |
1060 | { | |
1061 | } | |
1062 | static inline __init void hugetlb_cma_check(void) | |
1063 | { | |
1064 | } | |
1065 | #endif | |
1066 | ||
c1991e07 PX |
1067 | bool want_pmd_share(struct vm_area_struct *vma, unsigned long addr); |
1068 | ||
537cf30b PX |
1069 | #ifndef __HAVE_ARCH_FLUSH_HUGETLB_TLB_RANGE |
1070 | /* | |
1071 | * ARCHes with special requirements for evicting HUGETLB backing TLB entries can | |
1072 | * implement this. | |
1073 | */ | |
1074 | #define flush_hugetlb_tlb_range(vma, addr, end) flush_tlb_range(vma, addr, end) | |
1075 | #endif | |
1076 | ||
1da177e4 | 1077 | #endif /* _LINUX_HUGETLB_H */ |