Commit | Line | Data |
---|---|---|
b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
71e3aac0 AA |
2 | #ifndef _LINUX_HUGE_MM_H |
3 | #define _LINUX_HUGE_MM_H | |
4 | ||
16981d76 | 5 | #include <linux/sched/coredump.h> |
226ab561 | 6 | #include <linux/mm_types.h> |
16981d76 | 7 | |
baabda26 DW |
8 | #include <linux/fs.h> /* only for vma_is_dax() */ |
9 | ||
ebfe1b8f RC |
10 | vm_fault_t do_huge_pmd_anonymous_page(struct vm_fault *vmf); |
11 | int copy_huge_pmd(struct mm_struct *dst_mm, struct mm_struct *src_mm, | |
12 | pmd_t *dst_pmd, pmd_t *src_pmd, unsigned long addr, | |
8f34f1ea | 13 | struct vm_area_struct *dst_vma, struct vm_area_struct *src_vma); |
5db4f15c | 14 | void huge_pmd_set_accessed(struct vm_fault *vmf); |
ebfe1b8f RC |
15 | int copy_huge_pud(struct mm_struct *dst_mm, struct mm_struct *src_mm, |
16 | pud_t *dst_pud, pud_t *src_pud, unsigned long addr, | |
17 | struct vm_area_struct *vma); | |
a00cc7d9 MW |
18 | |
19 | #ifdef CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD | |
ebfe1b8f | 20 | void huge_pud_set_accessed(struct vm_fault *vmf, pud_t orig_pud); |
a00cc7d9 MW |
21 | #else |
22 | static inline void huge_pud_set_accessed(struct vm_fault *vmf, pud_t orig_pud) | |
23 | { | |
24 | } | |
25 | #endif | |
26 | ||
5db4f15c | 27 | vm_fault_t do_huge_pmd_wp_page(struct vm_fault *vmf); |
ebfe1b8f RC |
28 | struct page *follow_trans_huge_pmd(struct vm_area_struct *vma, |
29 | unsigned long addr, pmd_t *pmd, | |
30 | unsigned int flags); | |
31 | bool madvise_free_huge_pmd(struct mmu_gather *tlb, struct vm_area_struct *vma, | |
32 | pmd_t *pmd, unsigned long addr, unsigned long next); | |
33 | int zap_huge_pmd(struct mmu_gather *tlb, struct vm_area_struct *vma, pmd_t *pmd, | |
34 | unsigned long addr); | |
35 | int zap_huge_pud(struct mmu_gather *tlb, struct vm_area_struct *vma, pud_t *pud, | |
36 | unsigned long addr); | |
37 | bool move_huge_pmd(struct vm_area_struct *vma, unsigned long old_addr, | |
38 | unsigned long new_addr, pmd_t *old_pmd, pmd_t *new_pmd); | |
4a18419f NA |
39 | int change_huge_pmd(struct mmu_gather *tlb, struct vm_area_struct *vma, |
40 | pmd_t *pmd, unsigned long addr, pgprot_t newprot, | |
41 | unsigned long cp_flags); | |
9a9731b1 THV |
42 | vm_fault_t vmf_insert_pfn_pmd_prot(struct vm_fault *vmf, pfn_t pfn, |
43 | pgprot_t pgprot, bool write); | |
44 | ||
45 | /** | |
46 | * vmf_insert_pfn_pmd - insert a pmd size pfn | |
47 | * @vmf: Structure describing the fault | |
48 | * @pfn: pfn to insert | |
49 | * @pgprot: page protection to use | |
50 | * @write: whether it's a write fault | |
51 | * | |
52 | * Insert a pmd size pfn. See vmf_insert_pfn() for additional info. | |
53 | * | |
54 | * Return: vm_fault_t value. | |
55 | */ | |
56 | static inline vm_fault_t vmf_insert_pfn_pmd(struct vm_fault *vmf, pfn_t pfn, | |
57 | bool write) | |
58 | { | |
59 | return vmf_insert_pfn_pmd_prot(vmf, pfn, vmf->vma->vm_page_prot, write); | |
60 | } | |
61 | vm_fault_t vmf_insert_pfn_pud_prot(struct vm_fault *vmf, pfn_t pfn, | |
62 | pgprot_t pgprot, bool write); | |
63 | ||
64 | /** | |
65 | * vmf_insert_pfn_pud - insert a pud size pfn | |
66 | * @vmf: Structure describing the fault | |
67 | * @pfn: pfn to insert | |
68 | * @pgprot: page protection to use | |
69 | * @write: whether it's a write fault | |
70 | * | |
71 | * Insert a pud size pfn. See vmf_insert_pfn() for additional info. | |
72 | * | |
73 | * Return: vm_fault_t value. | |
74 | */ | |
75 | static inline vm_fault_t vmf_insert_pfn_pud(struct vm_fault *vmf, pfn_t pfn, | |
76 | bool write) | |
77 | { | |
78 | return vmf_insert_pfn_pud_prot(vmf, pfn, vmf->vma->vm_page_prot, write); | |
79 | } | |
80 | ||
71e3aac0 | 81 | enum transparent_hugepage_flag { |
bae84953 | 82 | TRANSPARENT_HUGEPAGE_NEVER_DAX, |
71e3aac0 AA |
83 | TRANSPARENT_HUGEPAGE_FLAG, |
84 | TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG, | |
444eb2a4 MG |
85 | TRANSPARENT_HUGEPAGE_DEFRAG_DIRECT_FLAG, |
86 | TRANSPARENT_HUGEPAGE_DEFRAG_KSWAPD_FLAG, | |
21440d7e | 87 | TRANSPARENT_HUGEPAGE_DEFRAG_KSWAPD_OR_MADV_FLAG, |
71e3aac0 | 88 | TRANSPARENT_HUGEPAGE_DEFRAG_REQ_MADV_FLAG, |
ba76149f | 89 | TRANSPARENT_HUGEPAGE_DEFRAG_KHUGEPAGED_FLAG, |
79da5407 | 90 | TRANSPARENT_HUGEPAGE_USE_ZERO_PAGE_FLAG, |
71e3aac0 AA |
91 | }; |
92 | ||
b46e756f KS |
93 | struct kobject; |
94 | struct kobj_attribute; | |
95 | ||
ebfe1b8f RC |
96 | ssize_t single_hugepage_flag_store(struct kobject *kobj, |
97 | struct kobj_attribute *attr, | |
98 | const char *buf, size_t count, | |
99 | enum transparent_hugepage_flag flag); | |
100 | ssize_t single_hugepage_flag_show(struct kobject *kobj, | |
101 | struct kobj_attribute *attr, char *buf, | |
102 | enum transparent_hugepage_flag flag); | |
5a6e75f8 KS |
103 | extern struct kobj_attribute shmem_enabled_attr; |
104 | ||
d8c37c48 NH |
105 | #define HPAGE_PMD_ORDER (HPAGE_PMD_SHIFT-PAGE_SHIFT) |
106 | #define HPAGE_PMD_NR (1<<HPAGE_PMD_ORDER) | |
107 | ||
71e3aac0 | 108 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
fde52796 AK |
109 | #define HPAGE_PMD_SHIFT PMD_SHIFT |
110 | #define HPAGE_PMD_SIZE ((1UL) << HPAGE_PMD_SHIFT) | |
111 | #define HPAGE_PMD_MASK (~(HPAGE_PMD_SIZE - 1)) | |
71e3aac0 | 112 | |
a00cc7d9 MW |
113 | #define HPAGE_PUD_SHIFT PUD_SHIFT |
114 | #define HPAGE_PUD_SIZE ((1UL) << HPAGE_PUD_SHIFT) | |
115 | #define HPAGE_PUD_MASK (~(HPAGE_PUD_SIZE - 1)) | |
116 | ||
16981d76 DW |
117 | extern unsigned long transparent_hugepage_flags; |
118 | ||
1064026b YS |
119 | #define hugepage_flags_enabled() \ |
120 | (transparent_hugepage_flags & \ | |
121 | ((1<<TRANSPARENT_HUGEPAGE_FLAG) | \ | |
122 | (1<<TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG))) | |
123 | #define hugepage_flags_always() \ | |
124 | (transparent_hugepage_flags & \ | |
125 | (1<<TRANSPARENT_HUGEPAGE_FLAG)) | |
126 | ||
4fa6893f YS |
127 | /* |
128 | * Do the below checks: | |
129 | * - For file vma, check if the linear page offset of vma is | |
130 | * HPAGE_PMD_NR aligned within the file. The hugepage is | |
131 | * guaranteed to be hugepage-aligned within the file, but we must | |
132 | * check that the PMD-aligned addresses in the VMA map to | |
133 | * PMD-aligned offsets within the file, else the hugepage will | |
134 | * not be PMD-mappable. | |
135 | * - For all vmas, check if the haddr is in an aligned HPAGE_PMD_SIZE | |
136 | * area. | |
137 | */ | |
e6be37b2 | 138 | static inline bool transhuge_vma_suitable(struct vm_area_struct *vma, |
c453d8c7 | 139 | unsigned long addr) |
e6be37b2 | 140 | { |
c453d8c7 YS |
141 | unsigned long haddr; |
142 | ||
e6be37b2 ML |
143 | /* Don't have to check pgoff for anonymous vma */ |
144 | if (!vma_is_anonymous(vma)) { | |
145 | if (!IS_ALIGNED((vma->vm_start >> PAGE_SHIFT) - vma->vm_pgoff, | |
146 | HPAGE_PMD_NR)) | |
147 | return false; | |
148 | } | |
149 | ||
c453d8c7 | 150 | haddr = addr & HPAGE_PMD_MASK; |
e6be37b2 | 151 | |
e6be37b2 | 152 | if (haddr < vma->vm_start || haddr + HPAGE_PMD_SIZE > vma->vm_end) |
e6be37b2 ML |
153 | return false; |
154 | return true; | |
155 | } | |
156 | ||
78d12c19 YS |
157 | static inline bool file_thp_enabled(struct vm_area_struct *vma) |
158 | { | |
159 | struct inode *inode; | |
160 | ||
161 | if (!vma->vm_file) | |
162 | return false; | |
163 | ||
164 | inode = vma->vm_file->f_inode; | |
165 | ||
166 | return (IS_ENABLED(CONFIG_READ_ONLY_THP_FOR_FS)) && | |
167 | (vma->vm_flags & VM_EXEC) && | |
168 | !inode_is_open_for_write(inode) && S_ISREG(inode->i_mode); | |
169 | } | |
170 | ||
a7f4e6e4 ZK |
171 | bool hugepage_vma_check(struct vm_area_struct *vma, unsigned long vm_flags, |
172 | bool smaps, bool in_pf, bool enforce_sysfs); | |
43675e6f | 173 | |
79da5407 KS |
174 | #define transparent_hugepage_use_zero_page() \ |
175 | (transparent_hugepage_flags & \ | |
176 | (1<<TRANSPARENT_HUGEPAGE_USE_ZERO_PAGE_FLAG)) | |
71e3aac0 | 177 | |
ebfe1b8f RC |
178 | unsigned long thp_get_unmapped_area(struct file *filp, unsigned long addr, |
179 | unsigned long len, unsigned long pgoff, unsigned long flags); | |
74d2fad1 | 180 | |
ebfe1b8f RC |
181 | void prep_transhuge_page(struct page *page); |
182 | void free_transhuge_page(struct page *page); | |
9a982250 | 183 | |
d4b4084a | 184 | bool can_split_folio(struct folio *folio, int *pextra_pins); |
e9b61f19 KS |
185 | int split_huge_page_to_list(struct page *page, struct list_head *list); |
186 | static inline int split_huge_page(struct page *page) | |
187 | { | |
188 | return split_huge_page_to_list(page, NULL); | |
189 | } | |
9a982250 | 190 | void deferred_split_huge_page(struct page *page); |
eef1b3ba KS |
191 | |
192 | void __split_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd, | |
af28a988 | 193 | unsigned long address, bool freeze, struct folio *folio); |
eef1b3ba KS |
194 | |
195 | #define split_huge_pmd(__vma, __pmd, __address) \ | |
196 | do { \ | |
197 | pmd_t *____pmd = (__pmd); \ | |
84c3fc4e | 198 | if (is_swap_pmd(*____pmd) || pmd_trans_huge(*____pmd) \ |
5c7fb56e | 199 | || pmd_devmap(*____pmd)) \ |
fec89c10 | 200 | __split_huge_pmd(__vma, __pmd, __address, \ |
33f4751e | 201 | false, NULL); \ |
eef1b3ba | 202 | } while (0) |
ad0bed24 | 203 | |
2a52bcbc | 204 | |
fec89c10 | 205 | void split_huge_pmd_address(struct vm_area_struct *vma, unsigned long address, |
af28a988 | 206 | bool freeze, struct folio *folio); |
2a52bcbc | 207 | |
a00cc7d9 MW |
208 | void __split_huge_pud(struct vm_area_struct *vma, pud_t *pud, |
209 | unsigned long address); | |
210 | ||
211 | #define split_huge_pud(__vma, __pud, __address) \ | |
212 | do { \ | |
213 | pud_t *____pud = (__pud); \ | |
214 | if (pud_trans_huge(*____pud) \ | |
215 | || pud_devmap(*____pud)) \ | |
216 | __split_huge_pud(__vma, __pud, __address); \ | |
217 | } while (0) | |
218 | ||
ebfe1b8f RC |
219 | int hugepage_madvise(struct vm_area_struct *vma, unsigned long *vm_flags, |
220 | int advice); | |
7d8faaf1 ZK |
221 | int madvise_collapse(struct vm_area_struct *vma, |
222 | struct vm_area_struct **prev, | |
223 | unsigned long start, unsigned long end); | |
ebfe1b8f RC |
224 | void vma_adjust_trans_huge(struct vm_area_struct *vma, unsigned long start, |
225 | unsigned long end, long adjust_next); | |
226 | spinlock_t *__pmd_trans_huge_lock(pmd_t *pmd, struct vm_area_struct *vma); | |
227 | spinlock_t *__pud_trans_huge_lock(pud_t *pud, struct vm_area_struct *vma); | |
84c3fc4e ZY |
228 | |
229 | static inline int is_swap_pmd(pmd_t pmd) | |
230 | { | |
231 | return !pmd_none(pmd) && !pmd_present(pmd); | |
232 | } | |
233 | ||
c1e8d7c6 | 234 | /* mmap_lock must be held on entry */ |
b6ec57f4 KS |
235 | static inline spinlock_t *pmd_trans_huge_lock(pmd_t *pmd, |
236 | struct vm_area_struct *vma) | |
025c5b24 | 237 | { |
84c3fc4e | 238 | if (is_swap_pmd(*pmd) || pmd_trans_huge(*pmd) || pmd_devmap(*pmd)) |
b6ec57f4 | 239 | return __pmd_trans_huge_lock(pmd, vma); |
025c5b24 | 240 | else |
969e8d7e | 241 | return NULL; |
025c5b24 | 242 | } |
a00cc7d9 MW |
243 | static inline spinlock_t *pud_trans_huge_lock(pud_t *pud, |
244 | struct vm_area_struct *vma) | |
245 | { | |
a00cc7d9 MW |
246 | if (pud_trans_huge(*pud) || pud_devmap(*pud)) |
247 | return __pud_trans_huge_lock(pud, vma); | |
248 | else | |
249 | return NULL; | |
250 | } | |
6ffbb458 | 251 | |
5bf34d7c MWO |
252 | /** |
253 | * folio_test_pmd_mappable - Can we map this folio with a PMD? | |
254 | * @folio: The folio to test | |
255 | */ | |
256 | static inline bool folio_test_pmd_mappable(struct folio *folio) | |
257 | { | |
258 | return folio_order(folio) >= HPAGE_PMD_ORDER; | |
259 | } | |
260 | ||
a00cc7d9 | 261 | struct page *follow_devmap_pmd(struct vm_area_struct *vma, unsigned long addr, |
df06b37f | 262 | pmd_t *pmd, int flags, struct dev_pagemap **pgmap); |
a00cc7d9 | 263 | struct page *follow_devmap_pud(struct vm_area_struct *vma, unsigned long addr, |
df06b37f | 264 | pud_t *pud, int flags, struct dev_pagemap **pgmap); |
a00cc7d9 | 265 | |
5db4f15c | 266 | vm_fault_t do_huge_pmd_numa_page(struct vm_fault *vmf); |
d10e63f2 | 267 | |
56873f43 | 268 | extern struct page *huge_zero_page; |
3b77e8c8 | 269 | extern unsigned long huge_zero_pfn; |
56873f43 WY |
270 | |
271 | static inline bool is_huge_zero_page(struct page *page) | |
272 | { | |
6aa7de05 | 273 | return READ_ONCE(huge_zero_page) == page; |
56873f43 WY |
274 | } |
275 | ||
fc437044 MW |
276 | static inline bool is_huge_zero_pmd(pmd_t pmd) |
277 | { | |
3ce4fee4 | 278 | return pmd_present(pmd) && READ_ONCE(huge_zero_pfn) == pmd_pfn(pmd); |
fc437044 MW |
279 | } |
280 | ||
a00cc7d9 MW |
281 | static inline bool is_huge_zero_pud(pud_t pud) |
282 | { | |
283 | return false; | |
284 | } | |
285 | ||
6fcb52a5 AL |
286 | struct page *mm_get_huge_zero_page(struct mm_struct *mm); |
287 | void mm_put_huge_zero_page(struct mm_struct *mm); | |
fc437044 | 288 | |
10102459 KS |
289 | #define mk_huge_pmd(page, prot) pmd_mkhuge(mk_pmd(page, prot)) |
290 | ||
9c670ea3 NH |
291 | static inline bool thp_migration_supported(void) |
292 | { | |
293 | return IS_ENABLED(CONFIG_ARCH_ENABLE_THP_MIGRATION); | |
294 | } | |
295 | ||
87eaceb3 YS |
296 | static inline struct list_head *page_deferred_list(struct page *page) |
297 | { | |
298 | /* | |
121c1781 ML |
299 | * See organization of tail pages of compound page in |
300 | * "struct page" definition. | |
87eaceb3 YS |
301 | */ |
302 | return &page[2].deferred_list; | |
303 | } | |
304 | ||
71e3aac0 | 305 | #else /* CONFIG_TRANSPARENT_HUGEPAGE */ |
d8c37c48 NH |
306 | #define HPAGE_PMD_SHIFT ({ BUILD_BUG(); 0; }) |
307 | #define HPAGE_PMD_MASK ({ BUILD_BUG(); 0; }) | |
308 | #define HPAGE_PMD_SIZE ({ BUILD_BUG(); 0; }) | |
71e3aac0 | 309 | |
a00cc7d9 MW |
310 | #define HPAGE_PUD_SHIFT ({ BUILD_BUG(); 0; }) |
311 | #define HPAGE_PUD_MASK ({ BUILD_BUG(); 0; }) | |
312 | #define HPAGE_PUD_SIZE ({ BUILD_BUG(); 0; }) | |
313 | ||
5bf34d7c MWO |
314 | static inline bool folio_test_pmd_mappable(struct folio *folio) |
315 | { | |
316 | return false; | |
317 | } | |
318 | ||
43675e6f | 319 | static inline bool transhuge_vma_suitable(struct vm_area_struct *vma, |
c453d8c7 | 320 | unsigned long addr) |
43675e6f YS |
321 | { |
322 | return false; | |
323 | } | |
324 | ||
9fec5168 | 325 | static inline bool hugepage_vma_check(struct vm_area_struct *vma, |
a7f4e6e4 ZK |
326 | unsigned long vm_flags, bool smaps, |
327 | bool in_pf, bool enforce_sysfs) | |
e6be37b2 ML |
328 | { |
329 | return false; | |
330 | } | |
331 | ||
800d8c63 KS |
332 | static inline void prep_transhuge_page(struct page *page) {} |
333 | ||
71e3aac0 | 334 | #define transparent_hugepage_flags 0UL |
74d2fad1 TK |
335 | |
336 | #define thp_get_unmapped_area NULL | |
337 | ||
b8f593cd | 338 | static inline bool |
d4b4084a | 339 | can_split_folio(struct folio *folio, int *pextra_pins) |
b8f593cd | 340 | { |
b8f593cd HY |
341 | return false; |
342 | } | |
5bc7b8ac SL |
343 | static inline int |
344 | split_huge_page_to_list(struct page *page, struct list_head *list) | |
345 | { | |
346 | return 0; | |
347 | } | |
71e3aac0 AA |
348 | static inline int split_huge_page(struct page *page) |
349 | { | |
350 | return 0; | |
351 | } | |
9a982250 | 352 | static inline void deferred_split_huge_page(struct page *page) {} |
78ddc534 | 353 | #define split_huge_pmd(__vma, __pmd, __address) \ |
e180377f | 354 | do { } while (0) |
2a52bcbc | 355 | |
fd60775a | 356 | static inline void __split_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd, |
af28a988 | 357 | unsigned long address, bool freeze, struct folio *folio) {} |
2a52bcbc | 358 | static inline void split_huge_pmd_address(struct vm_area_struct *vma, |
af28a988 | 359 | unsigned long address, bool freeze, struct folio *folio) {} |
2a52bcbc | 360 | |
a00cc7d9 MW |
361 | #define split_huge_pud(__vma, __pmd, __address) \ |
362 | do { } while (0) | |
363 | ||
60ab3244 AA |
364 | static inline int hugepage_madvise(struct vm_area_struct *vma, |
365 | unsigned long *vm_flags, int advice) | |
0af4e98b | 366 | { |
7d8faaf1 | 367 | return -EINVAL; |
0af4e98b | 368 | } |
7d8faaf1 ZK |
369 | |
370 | static inline int madvise_collapse(struct vm_area_struct *vma, | |
371 | struct vm_area_struct **prev, | |
372 | unsigned long start, unsigned long end) | |
373 | { | |
374 | return -EINVAL; | |
375 | } | |
376 | ||
94fcc585 AA |
377 | static inline void vma_adjust_trans_huge(struct vm_area_struct *vma, |
378 | unsigned long start, | |
379 | unsigned long end, | |
380 | long adjust_next) | |
381 | { | |
382 | } | |
84c3fc4e ZY |
383 | static inline int is_swap_pmd(pmd_t pmd) |
384 | { | |
385 | return 0; | |
386 | } | |
b6ec57f4 KS |
387 | static inline spinlock_t *pmd_trans_huge_lock(pmd_t *pmd, |
388 | struct vm_area_struct *vma) | |
025c5b24 | 389 | { |
b6ec57f4 | 390 | return NULL; |
025c5b24 | 391 | } |
a00cc7d9 MW |
392 | static inline spinlock_t *pud_trans_huge_lock(pud_t *pud, |
393 | struct vm_area_struct *vma) | |
394 | { | |
395 | return NULL; | |
396 | } | |
d10e63f2 | 397 | |
5db4f15c | 398 | static inline vm_fault_t do_huge_pmd_numa_page(struct vm_fault *vmf) |
d10e63f2 | 399 | { |
4daae3b4 | 400 | return 0; |
d10e63f2 MG |
401 | } |
402 | ||
56873f43 WY |
403 | static inline bool is_huge_zero_page(struct page *page) |
404 | { | |
405 | return false; | |
406 | } | |
407 | ||
3b77e8c8 HD |
408 | static inline bool is_huge_zero_pmd(pmd_t pmd) |
409 | { | |
410 | return false; | |
411 | } | |
412 | ||
a00cc7d9 MW |
413 | static inline bool is_huge_zero_pud(pud_t pud) |
414 | { | |
415 | return false; | |
416 | } | |
417 | ||
6fcb52a5 | 418 | static inline void mm_put_huge_zero_page(struct mm_struct *mm) |
aa88b68c | 419 | { |
6fcb52a5 | 420 | return; |
aa88b68c | 421 | } |
3565fce3 DW |
422 | |
423 | static inline struct page *follow_devmap_pmd(struct vm_area_struct *vma, | |
df06b37f | 424 | unsigned long addr, pmd_t *pmd, int flags, struct dev_pagemap **pgmap) |
3565fce3 DW |
425 | { |
426 | return NULL; | |
427 | } | |
a00cc7d9 MW |
428 | |
429 | static inline struct page *follow_devmap_pud(struct vm_area_struct *vma, | |
df06b37f | 430 | unsigned long addr, pud_t *pud, int flags, struct dev_pagemap **pgmap) |
a00cc7d9 MW |
431 | { |
432 | return NULL; | |
433 | } | |
9c670ea3 NH |
434 | |
435 | static inline bool thp_migration_supported(void) | |
436 | { | |
437 | return false; | |
438 | } | |
71e3aac0 AA |
439 | #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ |
440 | ||
346cf613 MWO |
441 | static inline int split_folio_to_list(struct folio *folio, |
442 | struct list_head *list) | |
443 | { | |
444 | return split_huge_page_to_list(&folio->page, list); | |
445 | } | |
446 | ||
d788f5b3 MWO |
447 | static inline int split_folio(struct folio *folio) |
448 | { | |
449 | return split_folio_to_list(folio, NULL); | |
450 | } | |
451 | ||
d0637c50 BS |
452 | /* |
453 | * archs that select ARCH_WANTS_THP_SWAP but don't support THP_SWP due to | |
454 | * limitations in the implementation like arm64 MTE can override this to | |
455 | * false | |
456 | */ | |
457 | #ifndef arch_thp_swp_supported | |
458 | static inline bool arch_thp_swp_supported(void) | |
459 | { | |
460 | return true; | |
461 | } | |
462 | #endif | |
463 | ||
71e3aac0 | 464 | #endif /* _LINUX_HUGE_MM_H */ |