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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
2 | #ifndef __LINUX_GFP_H |
3 | #define __LINUX_GFP_H | |
4 | ||
cb5a065b IM |
5 | #include <linux/gfp_types.h> |
6 | ||
1da177e4 | 7 | #include <linux/mmzone.h> |
082edb7b | 8 | #include <linux/topology.h> |
b951aaff SB |
9 | #include <linux/alloc_tag.h> |
10 | #include <linux/sched.h> | |
1da177e4 LT |
11 | |
12 | struct vm_area_struct; | |
ddc1a5cb | 13 | struct mempolicy; |
1da177e4 | 14 | |
dd56b046 | 15 | /* Convert GFP flags to their corresponding migrate type */ |
e12ba74d | 16 | #define GFP_MOVABLE_MASK (__GFP_RECLAIMABLE|__GFP_MOVABLE) |
016c13da | 17 | #define GFP_MOVABLE_SHIFT 3 |
6cb06229 | 18 | |
01c0bfe0 | 19 | static inline int gfp_migratetype(const gfp_t gfp_flags) |
467c996c | 20 | { |
016c13da MG |
21 | VM_WARN_ON((gfp_flags & GFP_MOVABLE_MASK) == GFP_MOVABLE_MASK); |
22 | BUILD_BUG_ON((1UL << GFP_MOVABLE_SHIFT) != ___GFP_MOVABLE); | |
23 | BUILD_BUG_ON((___GFP_MOVABLE >> GFP_MOVABLE_SHIFT) != MIGRATE_MOVABLE); | |
4d86d4f7 PC |
24 | BUILD_BUG_ON((___GFP_RECLAIMABLE >> GFP_MOVABLE_SHIFT) != MIGRATE_RECLAIMABLE); |
25 | BUILD_BUG_ON(((___GFP_MOVABLE | ___GFP_RECLAIMABLE) >> | |
26 | GFP_MOVABLE_SHIFT) != MIGRATE_HIGHATOMIC); | |
467c996c MG |
27 | |
28 | if (unlikely(page_group_by_mobility_disabled)) | |
29 | return MIGRATE_UNMOVABLE; | |
30 | ||
31 | /* Group based on mobility */ | |
fe573327 | 32 | return (__force unsigned long)(gfp_flags & GFP_MOVABLE_MASK) >> GFP_MOVABLE_SHIFT; |
467c996c | 33 | } |
dd56b046 MG |
34 | #undef GFP_MOVABLE_MASK |
35 | #undef GFP_MOVABLE_SHIFT | |
a2f1b424 | 36 | |
d0164adc MG |
37 | static inline bool gfpflags_allow_blocking(const gfp_t gfp_flags) |
38 | { | |
543dfb2d | 39 | return !!(gfp_flags & __GFP_DIRECT_RECLAIM); |
d0164adc MG |
40 | } |
41 | ||
b70d94ee CL |
42 | #ifdef CONFIG_HIGHMEM |
43 | #define OPT_ZONE_HIGHMEM ZONE_HIGHMEM | |
44 | #else | |
45 | #define OPT_ZONE_HIGHMEM ZONE_NORMAL | |
46 | #endif | |
47 | ||
4b51d669 | 48 | #ifdef CONFIG_ZONE_DMA |
b70d94ee CL |
49 | #define OPT_ZONE_DMA ZONE_DMA |
50 | #else | |
51 | #define OPT_ZONE_DMA ZONE_NORMAL | |
4b51d669 | 52 | #endif |
b70d94ee | 53 | |
4e4785bc | 54 | #ifdef CONFIG_ZONE_DMA32 |
b70d94ee CL |
55 | #define OPT_ZONE_DMA32 ZONE_DMA32 |
56 | #else | |
57 | #define OPT_ZONE_DMA32 ZONE_NORMAL | |
4e4785bc | 58 | #endif |
b70d94ee CL |
59 | |
60 | /* | |
61 | * GFP_ZONE_TABLE is a word size bitstring that is used for looking up the | |
ac2e8e40 HL |
62 | * zone to use given the lowest 4 bits of gfp_t. Entries are GFP_ZONES_SHIFT |
63 | * bits long and there are 16 of them to cover all possible combinations of | |
263ff5d8 | 64 | * __GFP_DMA, __GFP_DMA32, __GFP_MOVABLE and __GFP_HIGHMEM. |
b70d94ee CL |
65 | * |
66 | * The zone fallback order is MOVABLE=>HIGHMEM=>NORMAL=>DMA32=>DMA. | |
67 | * But GFP_MOVABLE is not only a zone specifier but also an allocation | |
68 | * policy. Therefore __GFP_MOVABLE plus another zone selector is valid. | |
263ff5d8 | 69 | * Only 1 bit of the lowest 3 bits (DMA,DMA32,HIGHMEM) can be set to "1". |
b70d94ee CL |
70 | * |
71 | * bit result | |
72 | * ================= | |
73 | * 0x0 => NORMAL | |
74 | * 0x1 => DMA or NORMAL | |
75 | * 0x2 => HIGHMEM or NORMAL | |
76 | * 0x3 => BAD (DMA+HIGHMEM) | |
4b33b695 | 77 | * 0x4 => DMA32 or NORMAL |
b70d94ee CL |
78 | * 0x5 => BAD (DMA+DMA32) |
79 | * 0x6 => BAD (HIGHMEM+DMA32) | |
80 | * 0x7 => BAD (HIGHMEM+DMA32+DMA) | |
81 | * 0x8 => NORMAL (MOVABLE+0) | |
82 | * 0x9 => DMA or NORMAL (MOVABLE+DMA) | |
83 | * 0xa => MOVABLE (Movable is valid only if HIGHMEM is set too) | |
84 | * 0xb => BAD (MOVABLE+HIGHMEM+DMA) | |
4b33b695 | 85 | * 0xc => DMA32 or NORMAL (MOVABLE+DMA32) |
b70d94ee CL |
86 | * 0xd => BAD (MOVABLE+DMA32+DMA) |
87 | * 0xe => BAD (MOVABLE+DMA32+HIGHMEM) | |
88 | * 0xf => BAD (MOVABLE+DMA32+HIGHMEM+DMA) | |
89 | * | |
b11a7b94 | 90 | * GFP_ZONES_SHIFT must be <= 2 on 32 bit platforms. |
b70d94ee CL |
91 | */ |
92 | ||
b11a7b94 DW |
93 | #if defined(CONFIG_ZONE_DEVICE) && (MAX_NR_ZONES-1) <= 4 |
94 | /* ZONE_DEVICE is not a valid GFP zone specifier */ | |
95 | #define GFP_ZONES_SHIFT 2 | |
96 | #else | |
97 | #define GFP_ZONES_SHIFT ZONES_SHIFT | |
98 | #endif | |
99 | ||
100 | #if 16 * GFP_ZONES_SHIFT > BITS_PER_LONG | |
101 | #error GFP_ZONES_SHIFT too large to create GFP_ZONE_TABLE integer | |
b70d94ee CL |
102 | #endif |
103 | ||
104 | #define GFP_ZONE_TABLE ( \ | |
b11a7b94 DW |
105 | (ZONE_NORMAL << 0 * GFP_ZONES_SHIFT) \ |
106 | | (OPT_ZONE_DMA << ___GFP_DMA * GFP_ZONES_SHIFT) \ | |
107 | | (OPT_ZONE_HIGHMEM << ___GFP_HIGHMEM * GFP_ZONES_SHIFT) \ | |
108 | | (OPT_ZONE_DMA32 << ___GFP_DMA32 * GFP_ZONES_SHIFT) \ | |
109 | | (ZONE_NORMAL << ___GFP_MOVABLE * GFP_ZONES_SHIFT) \ | |
110 | | (OPT_ZONE_DMA << (___GFP_MOVABLE | ___GFP_DMA) * GFP_ZONES_SHIFT) \ | |
111 | | (ZONE_MOVABLE << (___GFP_MOVABLE | ___GFP_HIGHMEM) * GFP_ZONES_SHIFT)\ | |
112 | | (OPT_ZONE_DMA32 << (___GFP_MOVABLE | ___GFP_DMA32) * GFP_ZONES_SHIFT)\ | |
b70d94ee CL |
113 | ) |
114 | ||
115 | /* | |
263ff5d8 | 116 | * GFP_ZONE_BAD is a bitmap for all combinations of __GFP_DMA, __GFP_DMA32 |
b70d94ee CL |
117 | * __GFP_HIGHMEM and __GFP_MOVABLE that are not permitted. One flag per |
118 | * entry starting with bit 0. Bit is set if the combination is not | |
119 | * allowed. | |
120 | */ | |
121 | #define GFP_ZONE_BAD ( \ | |
16b56cf4 NK |
122 | 1 << (___GFP_DMA | ___GFP_HIGHMEM) \ |
123 | | 1 << (___GFP_DMA | ___GFP_DMA32) \ | |
124 | | 1 << (___GFP_DMA32 | ___GFP_HIGHMEM) \ | |
125 | | 1 << (___GFP_DMA | ___GFP_DMA32 | ___GFP_HIGHMEM) \ | |
126 | | 1 << (___GFP_MOVABLE | ___GFP_HIGHMEM | ___GFP_DMA) \ | |
127 | | 1 << (___GFP_MOVABLE | ___GFP_DMA32 | ___GFP_DMA) \ | |
128 | | 1 << (___GFP_MOVABLE | ___GFP_DMA32 | ___GFP_HIGHMEM) \ | |
129 | | 1 << (___GFP_MOVABLE | ___GFP_DMA32 | ___GFP_DMA | ___GFP_HIGHMEM) \ | |
b70d94ee CL |
130 | ) |
131 | ||
132 | static inline enum zone_type gfp_zone(gfp_t flags) | |
133 | { | |
134 | enum zone_type z; | |
16b56cf4 | 135 | int bit = (__force int) (flags & GFP_ZONEMASK); |
b70d94ee | 136 | |
b11a7b94 DW |
137 | z = (GFP_ZONE_TABLE >> (bit * GFP_ZONES_SHIFT)) & |
138 | ((1 << GFP_ZONES_SHIFT) - 1); | |
82d4b577 | 139 | VM_BUG_ON((GFP_ZONE_BAD >> bit) & 1); |
b70d94ee | 140 | return z; |
4e4785bc CL |
141 | } |
142 | ||
1da177e4 LT |
143 | /* |
144 | * There is only one page-allocator function, and two main namespaces to | |
145 | * it. The alloc_page*() variants return 'struct page *' and as such | |
146 | * can allocate highmem pages, the *get*page*() variants return | |
147 | * virtual kernel addresses to the allocated page(s). | |
148 | */ | |
149 | ||
54a6eb5c MG |
150 | static inline int gfp_zonelist(gfp_t flags) |
151 | { | |
c00eb15a YB |
152 | #ifdef CONFIG_NUMA |
153 | if (unlikely(flags & __GFP_THISNODE)) | |
154 | return ZONELIST_NOFALLBACK; | |
155 | #endif | |
156 | return ZONELIST_FALLBACK; | |
54a6eb5c MG |
157 | } |
158 | ||
1c00f936 DC |
159 | /* |
160 | * gfp flag masking for nested internal allocations. | |
161 | * | |
162 | * For code that needs to do allocations inside the public allocation API (e.g. | |
163 | * memory allocation tracking code) the allocations need to obey the caller | |
164 | * allocation context constrains to prevent allocation context mismatches (e.g. | |
165 | * GFP_KERNEL allocations in GFP_NOFS contexts) from potential deadlock | |
166 | * situations. | |
167 | * | |
168 | * It is also assumed that these nested allocations are for internal kernel | |
169 | * object storage purposes only and are not going to be used for DMA, etc. Hence | |
170 | * we strip out all the zone information and leave just the context information | |
171 | * intact. | |
172 | * | |
173 | * Further, internal allocations must fail before the higher level allocation | |
174 | * can fail, so we must make them fail faster and fail silently. We also don't | |
175 | * want them to deplete emergency reserves. Hence nested allocations must be | |
176 | * prepared for these allocations to fail. | |
177 | */ | |
178 | static inline gfp_t gfp_nested_mask(gfp_t flags) | |
179 | { | |
180 | return ((flags & (GFP_KERNEL | GFP_ATOMIC | __GFP_NOLOCKDEP)) | | |
181 | (__GFP_NORETRY | __GFP_NOMEMALLOC | __GFP_NOWARN)); | |
182 | } | |
183 | ||
1da177e4 LT |
184 | /* |
185 | * We get the zone list from the current node and the gfp_mask. | |
cb152a1a | 186 | * This zone list contains a maximum of MAX_NUMNODES*MAX_NR_ZONES zones. |
54a6eb5c MG |
187 | * There are two zonelists per node, one for all zones with memory and |
188 | * one containing just zones from the node the zonelist belongs to. | |
1da177e4 | 189 | * |
d3c251ab MR |
190 | * For the case of non-NUMA systems the NODE_DATA() gets optimized to |
191 | * &contig_page_data at compile-time. | |
1da177e4 | 192 | */ |
0e88460d MG |
193 | static inline struct zonelist *node_zonelist(int nid, gfp_t flags) |
194 | { | |
54a6eb5c | 195 | return NODE_DATA(nid)->node_zonelists + gfp_zonelist(flags); |
0e88460d | 196 | } |
1da177e4 LT |
197 | |
198 | #ifndef HAVE_ARCH_FREE_PAGE | |
199 | static inline void arch_free_page(struct page *page, int order) { } | |
200 | #endif | |
cc102509 NP |
201 | #ifndef HAVE_ARCH_ALLOC_PAGE |
202 | static inline void arch_alloc_page(struct page *page, int order) { } | |
203 | #endif | |
1da177e4 | 204 | |
b951aaff | 205 | struct page *__alloc_pages_noprof(gfp_t gfp, unsigned int order, int preferred_nid, |
84172f4b | 206 | nodemask_t *nodemask); |
b951aaff SB |
207 | #define __alloc_pages(...) alloc_hooks(__alloc_pages_noprof(__VA_ARGS__)) |
208 | ||
209 | struct folio *__folio_alloc_noprof(gfp_t gfp, unsigned int order, int preferred_nid, | |
cc09cb13 | 210 | nodemask_t *nodemask); |
b951aaff | 211 | #define __folio_alloc(...) alloc_hooks(__folio_alloc_noprof(__VA_ARGS__)) |
e4048e5d | 212 | |
b951aaff | 213 | unsigned long alloc_pages_bulk_noprof(gfp_t gfp, int preferred_nid, |
387ba26f | 214 | nodemask_t *nodemask, int nr_pages, |
0f87d9d3 MG |
215 | struct list_head *page_list, |
216 | struct page **page_array); | |
b951aaff | 217 | #define __alloc_pages_bulk(...) alloc_hooks(alloc_pages_bulk_noprof(__VA_ARGS__)) |
387ba26f | 218 | |
b951aaff | 219 | unsigned long alloc_pages_bulk_array_mempolicy_noprof(gfp_t gfp, |
c00b6b96 CW |
220 | unsigned long nr_pages, |
221 | struct page **page_array); | |
b951aaff SB |
222 | #define alloc_pages_bulk_array_mempolicy(...) \ |
223 | alloc_hooks(alloc_pages_bulk_array_mempolicy_noprof(__VA_ARGS__)) | |
c00b6b96 | 224 | |
387ba26f | 225 | /* Bulk allocate order-0 pages */ |
b951aaff SB |
226 | #define alloc_pages_bulk_list(_gfp, _nr_pages, _list) \ |
227 | __alloc_pages_bulk(_gfp, numa_mem_id(), NULL, _nr_pages, _list, NULL) | |
0f87d9d3 | 228 | |
b951aaff SB |
229 | #define alloc_pages_bulk_array(_gfp, _nr_pages, _page_array) \ |
230 | __alloc_pages_bulk(_gfp, numa_mem_id(), NULL, _nr_pages, NULL, _page_array) | |
387ba26f | 231 | |
a2afc59f | 232 | static inline unsigned long |
b951aaff SB |
233 | alloc_pages_bulk_array_node_noprof(gfp_t gfp, int nid, unsigned long nr_pages, |
234 | struct page **page_array) | |
a2afc59f URS |
235 | { |
236 | if (nid == NUMA_NO_NODE) | |
237 | nid = numa_mem_id(); | |
238 | ||
b951aaff | 239 | return alloc_pages_bulk_noprof(gfp, nid, NULL, nr_pages, NULL, page_array); |
a2afc59f URS |
240 | } |
241 | ||
b951aaff SB |
242 | #define alloc_pages_bulk_array_node(...) \ |
243 | alloc_hooks(alloc_pages_bulk_array_node_noprof(__VA_ARGS__)) | |
244 | ||
dec1d352 YS |
245 | static inline void warn_if_node_offline(int this_node, gfp_t gfp_mask) |
246 | { | |
247 | gfp_t warn_gfp = gfp_mask & (__GFP_THISNODE|__GFP_NOWARN); | |
248 | ||
249 | if (warn_gfp != (__GFP_THISNODE|__GFP_NOWARN)) | |
250 | return; | |
251 | ||
252 | if (node_online(this_node)) | |
253 | return; | |
254 | ||
255 | pr_warn("%pGg allocation from offline node %d\n", &gfp_mask, this_node); | |
256 | dump_stack(); | |
257 | } | |
258 | ||
96db800f VB |
259 | /* |
260 | * Allocate pages, preferring the node given as nid. The node must be valid and | |
261 | * online. For more general interface, see alloc_pages_node(). | |
262 | */ | |
263 | static inline struct page * | |
b951aaff | 264 | __alloc_pages_node_noprof(int nid, gfp_t gfp_mask, unsigned int order) |
1da177e4 | 265 | { |
0bc35a97 | 266 | VM_BUG_ON(nid < 0 || nid >= MAX_NUMNODES); |
dec1d352 | 267 | warn_if_node_offline(nid, gfp_mask); |
819a6928 | 268 | |
b951aaff | 269 | return __alloc_pages_noprof(gfp_mask, order, nid, NULL); |
1da177e4 LT |
270 | } |
271 | ||
b951aaff SB |
272 | #define __alloc_pages_node(...) alloc_hooks(__alloc_pages_node_noprof(__VA_ARGS__)) |
273 | ||
cc09cb13 | 274 | static inline |
b951aaff | 275 | struct folio *__folio_alloc_node_noprof(gfp_t gfp, unsigned int order, int nid) |
cc09cb13 MWO |
276 | { |
277 | VM_BUG_ON(nid < 0 || nid >= MAX_NUMNODES); | |
dec1d352 | 278 | warn_if_node_offline(nid, gfp); |
cc09cb13 | 279 | |
b951aaff | 280 | return __folio_alloc_noprof(gfp, order, nid, NULL); |
cc09cb13 MWO |
281 | } |
282 | ||
b951aaff SB |
283 | #define __folio_alloc_node(...) alloc_hooks(__folio_alloc_node_noprof(__VA_ARGS__)) |
284 | ||
96db800f VB |
285 | /* |
286 | * Allocate pages, preferring the node given as nid. When nid == NUMA_NO_NODE, | |
82c1fc71 VB |
287 | * prefer the current CPU's closest node. Otherwise node must be valid and |
288 | * online. | |
96db800f | 289 | */ |
b951aaff SB |
290 | static inline struct page *alloc_pages_node_noprof(int nid, gfp_t gfp_mask, |
291 | unsigned int order) | |
6484eb3e | 292 | { |
0bc35a97 | 293 | if (nid == NUMA_NO_NODE) |
82c1fc71 | 294 | nid = numa_mem_id(); |
6484eb3e | 295 | |
b951aaff | 296 | return __alloc_pages_node_noprof(nid, gfp_mask, order); |
6484eb3e MG |
297 | } |
298 | ||
b951aaff SB |
299 | #define alloc_pages_node(...) alloc_hooks(alloc_pages_node_noprof(__VA_ARGS__)) |
300 | ||
1da177e4 | 301 | #ifdef CONFIG_NUMA |
b951aaff SB |
302 | struct page *alloc_pages_noprof(gfp_t gfp, unsigned int order); |
303 | struct page *alloc_pages_mpol_noprof(gfp_t gfp, unsigned int order, | |
ddc1a5cb | 304 | struct mempolicy *mpol, pgoff_t ilx, int nid); |
b951aaff | 305 | struct folio *folio_alloc_noprof(gfp_t gfp, unsigned int order); |
a19621ed KW |
306 | struct folio *folio_alloc_mpol_noprof(gfp_t gfp, unsigned int order, |
307 | struct mempolicy *mpol, pgoff_t ilx, int nid); | |
b951aaff | 308 | struct folio *vma_alloc_folio_noprof(gfp_t gfp, int order, struct vm_area_struct *vma, |
f584b680 | 309 | unsigned long addr, bool hugepage); |
1da177e4 | 310 | #else |
b951aaff | 311 | static inline struct page *alloc_pages_noprof(gfp_t gfp_mask, unsigned int order) |
43ee5b6d | 312 | { |
b951aaff | 313 | return alloc_pages_node_noprof(numa_node_id(), gfp_mask, order); |
43ee5b6d | 314 | } |
b951aaff | 315 | static inline struct page *alloc_pages_mpol_noprof(gfp_t gfp, unsigned int order, |
ddc1a5cb HD |
316 | struct mempolicy *mpol, pgoff_t ilx, int nid) |
317 | { | |
b951aaff | 318 | return alloc_pages_noprof(gfp, order); |
ddc1a5cb | 319 | } |
b951aaff | 320 | static inline struct folio *folio_alloc_noprof(gfp_t gfp, unsigned int order) |
cc09cb13 | 321 | { |
0a6fff20 | 322 | return __folio_alloc_node_noprof(gfp, order, numa_node_id()); |
cc09cb13 | 323 | } |
a19621ed KW |
324 | static inline struct folio *folio_alloc_mpol_noprof(gfp_t gfp, unsigned int order, |
325 | struct mempolicy *mpol, pgoff_t ilx, int nid) | |
326 | { | |
327 | return folio_alloc_noprof(gfp, order); | |
328 | } | |
b951aaff SB |
329 | #define vma_alloc_folio_noprof(gfp, order, vma, addr, hugepage) \ |
330 | folio_alloc_noprof(gfp, order) | |
1da177e4 | 331 | #endif |
b951aaff SB |
332 | |
333 | #define alloc_pages(...) alloc_hooks(alloc_pages_noprof(__VA_ARGS__)) | |
334 | #define alloc_pages_mpol(...) alloc_hooks(alloc_pages_mpol_noprof(__VA_ARGS__)) | |
335 | #define folio_alloc(...) alloc_hooks(folio_alloc_noprof(__VA_ARGS__)) | |
a19621ed | 336 | #define folio_alloc_mpol(...) alloc_hooks(folio_alloc_mpol_noprof(__VA_ARGS__)) |
b951aaff SB |
337 | #define vma_alloc_folio(...) alloc_hooks(vma_alloc_folio_noprof(__VA_ARGS__)) |
338 | ||
1da177e4 | 339 | #define alloc_page(gfp_mask) alloc_pages(gfp_mask, 0) |
b951aaff SB |
340 | |
341 | static inline struct page *alloc_page_vma_noprof(gfp_t gfp, | |
adf88aa8 MWO |
342 | struct vm_area_struct *vma, unsigned long addr) |
343 | { | |
b951aaff | 344 | struct folio *folio = vma_alloc_folio_noprof(gfp, 0, vma, addr, false); |
adf88aa8 MWO |
345 | |
346 | return &folio->page; | |
347 | } | |
b951aaff SB |
348 | #define alloc_page_vma(...) alloc_hooks(alloc_page_vma_noprof(__VA_ARGS__)) |
349 | ||
350 | extern unsigned long get_free_pages_noprof(gfp_t gfp_mask, unsigned int order); | |
351 | #define __get_free_pages(...) alloc_hooks(get_free_pages_noprof(__VA_ARGS__)) | |
1da177e4 | 352 | |
b951aaff SB |
353 | extern unsigned long get_zeroed_page_noprof(gfp_t gfp_mask); |
354 | #define get_zeroed_page(...) alloc_hooks(get_zeroed_page_noprof(__VA_ARGS__)) | |
355 | ||
356 | void *alloc_pages_exact_noprof(size_t size, gfp_t gfp_mask) __alloc_size(1); | |
357 | #define alloc_pages_exact(...) alloc_hooks(alloc_pages_exact_noprof(__VA_ARGS__)) | |
1da177e4 | 358 | |
2be0ffe2 TT |
359 | void free_pages_exact(void *virt, size_t size); |
360 | ||
b951aaff SB |
361 | __meminit void *alloc_pages_exact_nid_noprof(int nid, size_t size, gfp_t gfp_mask) __alloc_size(2); |
362 | #define alloc_pages_exact_nid(...) \ | |
363 | alloc_hooks(alloc_pages_exact_nid_noprof(__VA_ARGS__)) | |
364 | ||
365 | #define __get_free_page(gfp_mask) \ | |
366 | __get_free_pages((gfp_mask), 0) | |
1da177e4 | 367 | |
b951aaff SB |
368 | #define __get_dma_pages(gfp_mask, order) \ |
369 | __get_free_pages((gfp_mask) | GFP_DMA, (order)) | |
1da177e4 | 370 | |
b3c97528 HH |
371 | extern void __free_pages(struct page *page, unsigned int order); |
372 | extern void free_pages(unsigned long addr, unsigned int order); | |
1da177e4 | 373 | |
b63ae8ca | 374 | struct page_frag_cache; |
a0727489 | 375 | void page_frag_cache_drain(struct page_frag_cache *nc); |
2976db80 | 376 | extern void __page_frag_cache_drain(struct page *page, unsigned int count); |
411c5f36 YL |
377 | void *__page_frag_alloc_align(struct page_frag_cache *nc, unsigned int fragsz, |
378 | gfp_t gfp_mask, unsigned int align_mask); | |
379 | ||
380 | static inline void *page_frag_alloc_align(struct page_frag_cache *nc, | |
381 | unsigned int fragsz, gfp_t gfp_mask, | |
382 | unsigned int align) | |
383 | { | |
384 | WARN_ON_ONCE(!is_power_of_2(align)); | |
385 | return __page_frag_alloc_align(nc, fragsz, gfp_mask, -align); | |
386 | } | |
b358e212 KH |
387 | |
388 | static inline void *page_frag_alloc(struct page_frag_cache *nc, | |
389 | unsigned int fragsz, gfp_t gfp_mask) | |
390 | { | |
411c5f36 | 391 | return __page_frag_alloc_align(nc, fragsz, gfp_mask, ~0u); |
b358e212 KH |
392 | } |
393 | ||
8c2dd3e4 | 394 | extern void page_frag_free(void *addr); |
b63ae8ca | 395 | |
1da177e4 | 396 | #define __free_page(page) __free_pages((page), 0) |
fd23855e | 397 | #define free_page(addr) free_pages((addr), 0) |
1da177e4 | 398 | |
c4fbed4b | 399 | void page_alloc_init_cpuhp(void); |
51a755c5 | 400 | int decay_pcp_high(struct zone *zone, struct per_cpu_pages *pcp); |
4037d452 | 401 | void drain_zone_pages(struct zone *zone, struct per_cpu_pages *pcp); |
93481ff0 VB |
402 | void drain_all_pages(struct zone *zone); |
403 | void drain_local_pages(struct zone *zone); | |
1da177e4 | 404 | |
0e1cc95b | 405 | void page_alloc_init_late(void); |
5cec4eb7 | 406 | void setup_pcp_cacheinfo(unsigned int cpu); |
0e1cc95b | 407 | |
f90ac398 MG |
408 | /* |
409 | * gfp_allowed_mask is set to GFP_BOOT_MASK during early boot to restrict what | |
410 | * GFP flags are used before interrupts are enabled. Once interrupts are | |
411 | * enabled, it is set to __GFP_BITS_MASK while the system is running. During | |
412 | * hibernation, it is used by PM to avoid I/O during memory allocation while | |
413 | * devices are suspended. | |
414 | */ | |
dcce284a BH |
415 | extern gfp_t gfp_allowed_mask; |
416 | ||
c93bdd0e MG |
417 | /* Returns true if the gfp_mask allows use of ALLOC_NO_WATERMARK */ |
418 | bool gfp_pfmemalloc_allowed(gfp_t gfp_mask); | |
419 | ||
07f44ac3 | 420 | static inline bool gfp_has_io_fs(gfp_t gfp) |
f90ac398 | 421 | { |
07f44ac3 | 422 | return (gfp & (__GFP_IO | __GFP_FS)) == (__GFP_IO | __GFP_FS); |
f90ac398 | 423 | } |
07f44ac3 | 424 | |
803de900 VB |
425 | /* |
426 | * Check if the gfp flags allow compaction - GFP_NOIO is a really | |
427 | * tricky context because the migration might require IO. | |
428 | */ | |
429 | static inline bool gfp_compaction_allowed(gfp_t gfp_mask) | |
430 | { | |
431 | return IS_ENABLED(CONFIG_COMPACTION) && (gfp_mask & __GFP_IO); | |
432 | } | |
433 | ||
07f44ac3 | 434 | extern gfp_t vma_thp_gfp_mask(struct vm_area_struct *vma); |
f90ac398 | 435 | |
8df995f6 | 436 | #ifdef CONFIG_CONTIG_ALLOC |
041d3a8c | 437 | /* The below functions must be run on a range from a single zone. */ |
b951aaff | 438 | extern int alloc_contig_range_noprof(unsigned long start, unsigned long end, |
ca96b625 | 439 | unsigned migratetype, gfp_t gfp_mask); |
b951aaff SB |
440 | #define alloc_contig_range(...) alloc_hooks(alloc_contig_range_noprof(__VA_ARGS__)) |
441 | ||
442 | extern struct page *alloc_contig_pages_noprof(unsigned long nr_pages, gfp_t gfp_mask, | |
443 | int nid, nodemask_t *nodemask); | |
444 | #define alloc_contig_pages(...) alloc_hooks(alloc_contig_pages_noprof(__VA_ARGS__)) | |
445 | ||
080fe206 | 446 | #endif |
78fa5150 | 447 | void free_contig_range(unsigned long pfn, unsigned long nr_pages); |
041d3a8c | 448 | |
e98337d1 YZ |
449 | #ifdef CONFIG_CONTIG_ALLOC |
450 | static inline struct folio *folio_alloc_gigantic_noprof(int order, gfp_t gfp, | |
451 | int nid, nodemask_t *node) | |
452 | { | |
453 | struct page *page; | |
454 | ||
455 | if (WARN_ON(!order || !(gfp & __GFP_COMP))) | |
456 | return NULL; | |
457 | ||
458 | page = alloc_contig_pages_noprof(1 << order, gfp, nid, node); | |
459 | ||
460 | return page ? page_folio(page) : NULL; | |
461 | } | |
462 | #else | |
463 | static inline struct folio *folio_alloc_gigantic_noprof(int order, gfp_t gfp, | |
464 | int nid, nodemask_t *node) | |
465 | { | |
466 | return NULL; | |
467 | } | |
468 | #endif | |
469 | /* This should be paired with folio_put() rather than free_contig_range(). */ | |
470 | #define folio_alloc_gigantic(...) alloc_hooks(folio_alloc_gigantic_noprof(__VA_ARGS__)) | |
471 | ||
1da177e4 | 472 | #endif /* __LINUX_GFP_H */ |