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1da177e4 LT |
1 | #ifndef _LINUX_SWAP_H |
2 | #define _LINUX_SWAP_H | |
3 | ||
1da177e4 LT |
4 | #include <linux/spinlock.h> |
5 | #include <linux/linkage.h> | |
6 | #include <linux/mmzone.h> | |
7 | #include <linux/list.h> | |
66e1707b | 8 | #include <linux/memcontrol.h> |
1da177e4 | 9 | #include <linux/sched.h> |
af936a16 | 10 | #include <linux/node.h> |
542d1c88 | 11 | |
1da177e4 LT |
12 | #include <asm/atomic.h> |
13 | #include <asm/page.h> | |
14 | ||
8bc719d3 MS |
15 | struct notifier_block; |
16 | ||
ab954160 AM |
17 | struct bio; |
18 | ||
1da177e4 LT |
19 | #define SWAP_FLAG_PREFER 0x8000 /* set if swap priority specified */ |
20 | #define SWAP_FLAG_PRIO_MASK 0x7fff | |
21 | #define SWAP_FLAG_PRIO_SHIFT 0 | |
22 | ||
23 | static inline int current_is_kswapd(void) | |
24 | { | |
25 | return current->flags & PF_KSWAPD; | |
26 | } | |
27 | ||
28 | /* | |
29 | * MAX_SWAPFILES defines the maximum number of swaptypes: things which can | |
30 | * be swapped to. The swap type and the offset into that swap type are | |
31 | * encoded into pte's and into pgoff_t's in the swapcache. Using five bits | |
32 | * for the type means that the maximum number of swapcache pages is 27 bits | |
33 | * on 32-bit-pgoff_t architectures. And that assumes that the architecture packs | |
34 | * the type/offset into the pte as 5/27 as well. | |
35 | */ | |
36 | #define MAX_SWAPFILES_SHIFT 5 | |
a7420aa5 AK |
37 | |
38 | /* | |
39 | * Use some of the swap files numbers for other purposes. This | |
40 | * is a convenient way to hook into the VM to trigger special | |
41 | * actions on faults. | |
42 | */ | |
43 | ||
44 | /* | |
45 | * NUMA node memory migration support | |
46 | */ | |
47 | #ifdef CONFIG_MIGRATION | |
48 | #define SWP_MIGRATION_NUM 2 | |
49 | #define SWP_MIGRATION_READ (MAX_SWAPFILES + SWP_HWPOISON_NUM) | |
50 | #define SWP_MIGRATION_WRITE (MAX_SWAPFILES + SWP_HWPOISON_NUM + 1) | |
0697212a | 51 | #else |
a7420aa5 | 52 | #define SWP_MIGRATION_NUM 0 |
0697212a | 53 | #endif |
1da177e4 | 54 | |
a7420aa5 AK |
55 | /* |
56 | * Handling of hardware poisoned pages with memory corruption. | |
57 | */ | |
58 | #ifdef CONFIG_MEMORY_FAILURE | |
59 | #define SWP_HWPOISON_NUM 1 | |
60 | #define SWP_HWPOISON MAX_SWAPFILES | |
61 | #else | |
62 | #define SWP_HWPOISON_NUM 0 | |
63 | #endif | |
64 | ||
65 | #define MAX_SWAPFILES \ | |
66 | ((1 << MAX_SWAPFILES_SHIFT) - SWP_MIGRATION_NUM - SWP_HWPOISON_NUM) | |
67 | ||
1da177e4 LT |
68 | /* |
69 | * Magic header for a swap area. The first part of the union is | |
70 | * what the swap magic looks like for the old (limited to 128MB) | |
71 | * swap area format, the second part of the union adds - in the | |
72 | * old reserved area - some extra information. Note that the first | |
73 | * kilobyte is reserved for boot loader or disk label stuff... | |
74 | * | |
75 | * Having the magic at the end of the PAGE_SIZE makes detecting swap | |
76 | * areas somewhat tricky on machines that support multiple page sizes. | |
77 | * For 2.5 we'll probably want to move the magic to just beyond the | |
78 | * bootbits... | |
79 | */ | |
80 | union swap_header { | |
81 | struct { | |
82 | char reserved[PAGE_SIZE - 10]; | |
83 | char magic[10]; /* SWAP-SPACE or SWAPSPACE2 */ | |
84 | } magic; | |
85 | struct { | |
e8f03d02 AD |
86 | char bootbits[1024]; /* Space for disklabel etc. */ |
87 | __u32 version; | |
88 | __u32 last_page; | |
89 | __u32 nr_badpages; | |
90 | unsigned char sws_uuid[16]; | |
91 | unsigned char sws_volume[16]; | |
92 | __u32 padding[117]; | |
93 | __u32 badpages[1]; | |
1da177e4 LT |
94 | } info; |
95 | }; | |
96 | ||
97 | /* A swap entry has to fit into a "unsigned long", as | |
98 | * the entry is hidden in the "index" field of the | |
99 | * swapper address space. | |
100 | */ | |
101 | typedef struct { | |
102 | unsigned long val; | |
103 | } swp_entry_t; | |
104 | ||
105 | /* | |
106 | * current->reclaim_state points to one of these when a task is running | |
107 | * memory reclaim | |
108 | */ | |
109 | struct reclaim_state { | |
110 | unsigned long reclaimed_slab; | |
111 | }; | |
112 | ||
113 | #ifdef __KERNEL__ | |
114 | ||
115 | struct address_space; | |
116 | struct sysinfo; | |
117 | struct writeback_control; | |
118 | struct zone; | |
119 | ||
120 | /* | |
121 | * A swap extent maps a range of a swapfile's PAGE_SIZE pages onto a range of | |
122 | * disk blocks. A list of swap extents maps the entire swapfile. (Where the | |
123 | * term `swapfile' refers to either a blockdevice or an IS_REG file. Apart | |
124 | * from setup, they're handled identically. | |
125 | * | |
126 | * We always assume that blocks are of size PAGE_SIZE. | |
127 | */ | |
128 | struct swap_extent { | |
129 | struct list_head list; | |
130 | pgoff_t start_page; | |
131 | pgoff_t nr_pages; | |
132 | sector_t start_block; | |
133 | }; | |
134 | ||
135 | /* | |
136 | * Max bad pages in the new format.. | |
137 | */ | |
138 | #define __swapoffset(x) ((unsigned long)&((union swap_header *)0)->x) | |
139 | #define MAX_SWAP_BADPAGES \ | |
140 | ((__swapoffset(magic.magic) - __swapoffset(info.badpages)) / sizeof(int)) | |
141 | ||
142 | enum { | |
143 | SWP_USED = (1 << 0), /* is slot in swap_info[] used? */ | |
144 | SWP_WRITEOK = (1 << 1), /* ok to write to this swap? */ | |
6a6ba831 | 145 | SWP_DISCARDABLE = (1 << 2), /* blkdev supports discard */ |
7992fde7 | 146 | SWP_DISCARDING = (1 << 3), /* now discarding a free cluster */ |
20137a49 | 147 | SWP_SOLIDSTATE = (1 << 4), /* blkdev seeks are cheap */ |
570a335b | 148 | SWP_CONTINUED = (1 << 5), /* swap_map has count continuation */ |
52b7efdb HD |
149 | /* add others here before... */ |
150 | SWP_SCANNING = (1 << 8), /* refcount in scan_swap_map */ | |
1da177e4 LT |
151 | }; |
152 | ||
153 | #define SWAP_CLUSTER_MAX 32 | |
154 | ||
570a335b HD |
155 | #define SWAP_MAP_MAX 0x3e /* Max duplication count, in first swap_map */ |
156 | #define SWAP_MAP_BAD 0x3f /* Note pageblock is bad, in first swap_map */ | |
157 | #define SWAP_HAS_CACHE 0x40 /* Flag page is cached, in first swap_map */ | |
158 | #define SWAP_CONT_MAX 0x7f /* Max count, in each swap_map continuation */ | |
159 | #define COUNT_CONTINUED 0x80 /* See swap_map continuation for full count */ | |
aaa46865 | 160 | #define SWAP_MAP_SHMEM 0xbf /* Owned by shmem/tmpfs, in first swap_map */ |
253d553b | 161 | |
1da177e4 LT |
162 | /* |
163 | * The in-memory structure used to track swap areas. | |
1da177e4 LT |
164 | */ |
165 | struct swap_info_struct { | |
efa90a98 HD |
166 | unsigned long flags; /* SWP_USED etc: see above */ |
167 | signed short prio; /* swap priority of this type */ | |
168 | signed char type; /* strange name for an index */ | |
169 | signed char next; /* next type on the swap list */ | |
7509765a HD |
170 | unsigned int max; /* extent of the swap_map */ |
171 | unsigned char *swap_map; /* vmalloc'ed array of usage counts */ | |
172 | unsigned int lowest_bit; /* index of first free in swap_map */ | |
173 | unsigned int highest_bit; /* index of last free in swap_map */ | |
174 | unsigned int pages; /* total of usable pages of swap */ | |
175 | unsigned int inuse_pages; /* number of those currently in use */ | |
176 | unsigned int cluster_next; /* likely index for next allocation */ | |
177 | unsigned int cluster_nr; /* countdown to next cluster search */ | |
7992fde7 HD |
178 | unsigned int lowest_alloc; /* while preparing discard cluster */ |
179 | unsigned int highest_alloc; /* while preparing discard cluster */ | |
7509765a HD |
180 | struct swap_extent *curr_swap_extent; |
181 | struct swap_extent first_swap_extent; | |
182 | struct block_device *bdev; /* swap device or bdev of swap file */ | |
183 | struct file *swap_file; /* seldom referenced */ | |
184 | unsigned int old_block_size; /* seldom referenced */ | |
1da177e4 LT |
185 | }; |
186 | ||
187 | struct swap_list_t { | |
188 | int head; /* head of priority-ordered swapfile list */ | |
189 | int next; /* swapfile to be used next */ | |
190 | }; | |
191 | ||
192 | /* Swap 50% full? Release swapcache more aggressively.. */ | |
193 | #define vm_swap_full() (nr_swap_pages*2 < total_swap_pages) | |
194 | ||
1da177e4 LT |
195 | /* linux/mm/page_alloc.c */ |
196 | extern unsigned long totalram_pages; | |
cb45b0e9 | 197 | extern unsigned long totalreserve_pages; |
1da177e4 LT |
198 | extern unsigned int nr_free_buffer_pages(void); |
199 | extern unsigned int nr_free_pagecache_pages(void); | |
200 | ||
96177299 CL |
201 | /* Definition of global_page_state not available yet */ |
202 | #define nr_free_pages() global_page_state(NR_FREE_PAGES) | |
203 | ||
204 | ||
1da177e4 | 205 | /* linux/mm/swap.c */ |
f04e9ebb KM |
206 | extern void __lru_cache_add(struct page *, enum lru_list lru); |
207 | extern void lru_cache_add_lru(struct page *, enum lru_list lru); | |
b3c97528 HH |
208 | extern void activate_page(struct page *); |
209 | extern void mark_page_accessed(struct page *); | |
1da177e4 | 210 | extern void lru_add_drain(void); |
053837fc | 211 | extern int lru_add_drain_all(void); |
ac6aadb2 | 212 | extern void rotate_reclaimable_page(struct page *page); |
1da177e4 LT |
213 | extern void swap_setup(void); |
214 | ||
894bc310 LS |
215 | extern void add_page_to_unevictable_list(struct page *page); |
216 | ||
f04e9ebb KM |
217 | /** |
218 | * lru_cache_add: add a page to the page lists | |
219 | * @page: the page to add | |
220 | */ | |
4f98a2fe | 221 | static inline void lru_cache_add_anon(struct page *page) |
f04e9ebb | 222 | { |
4f98a2fe | 223 | __lru_cache_add(page, LRU_INACTIVE_ANON); |
f04e9ebb KM |
224 | } |
225 | ||
4f98a2fe | 226 | static inline void lru_cache_add_active_anon(struct page *page) |
f04e9ebb | 227 | { |
4f98a2fe RR |
228 | __lru_cache_add(page, LRU_ACTIVE_ANON); |
229 | } | |
230 | ||
231 | static inline void lru_cache_add_file(struct page *page) | |
232 | { | |
233 | __lru_cache_add(page, LRU_INACTIVE_FILE); | |
234 | } | |
235 | ||
236 | static inline void lru_cache_add_active_file(struct page *page) | |
237 | { | |
238 | __lru_cache_add(page, LRU_ACTIVE_FILE); | |
f04e9ebb KM |
239 | } |
240 | ||
1da177e4 | 241 | /* linux/mm/vmscan.c */ |
dac1d27b | 242 | extern unsigned long try_to_free_pages(struct zonelist *zonelist, int order, |
327c0e96 | 243 | gfp_t gfp_mask, nodemask_t *mask); |
e1a1cd59 | 244 | extern unsigned long try_to_free_mem_cgroup_pages(struct mem_cgroup *mem, |
a7885eb8 KM |
245 | gfp_t gfp_mask, bool noswap, |
246 | unsigned int swappiness); | |
4e416953 BS |
247 | extern unsigned long mem_cgroup_shrink_node_zone(struct mem_cgroup *mem, |
248 | gfp_t gfp_mask, bool noswap, | |
249 | unsigned int swappiness, | |
250 | struct zone *zone, | |
251 | int nid); | |
4f98a2fe | 252 | extern int __isolate_lru_page(struct page *page, int mode, int file); |
69e05944 | 253 | extern unsigned long shrink_all_memory(unsigned long nr_pages); |
1da177e4 | 254 | extern int vm_swappiness; |
b20a3503 | 255 | extern int remove_mapping(struct address_space *mapping, struct page *page); |
bd1e22b8 | 256 | extern long vm_total_pages; |
b20a3503 | 257 | |
9eeff239 CL |
258 | #ifdef CONFIG_NUMA |
259 | extern int zone_reclaim_mode; | |
9614634f | 260 | extern int sysctl_min_unmapped_ratio; |
0ff38490 | 261 | extern int sysctl_min_slab_ratio; |
9eeff239 CL |
262 | extern int zone_reclaim(struct zone *, gfp_t, unsigned int); |
263 | #else | |
264 | #define zone_reclaim_mode 0 | |
265 | static inline int zone_reclaim(struct zone *z, gfp_t mask, unsigned int order) | |
266 | { | |
267 | return 0; | |
268 | } | |
269 | #endif | |
270 | ||
894bc310 | 271 | extern int page_evictable(struct page *page, struct vm_area_struct *vma); |
89e004ea | 272 | extern void scan_mapping_unevictable_pages(struct address_space *); |
af936a16 LS |
273 | |
274 | extern unsigned long scan_unevictable_pages; | |
8d65af78 | 275 | extern int scan_unevictable_handler(struct ctl_table *, int, |
af936a16 LS |
276 | void __user *, size_t *, loff_t *); |
277 | extern int scan_unevictable_register_node(struct node *node); | |
278 | extern void scan_unevictable_unregister_node(struct node *node); | |
894bc310 | 279 | |
3218ae14 | 280 | extern int kswapd_run(int nid); |
8fe23e05 | 281 | extern void kswapd_stop(int nid); |
3218ae14 | 282 | |
1da177e4 LT |
283 | #ifdef CONFIG_MMU |
284 | /* linux/mm/shmem.c */ | |
285 | extern int shmem_unuse(swp_entry_t entry, struct page *page); | |
286 | #endif /* CONFIG_MMU */ | |
287 | ||
288 | extern void swap_unplug_io_fn(struct backing_dev_info *, struct page *); | |
289 | ||
290 | #ifdef CONFIG_SWAP | |
291 | /* linux/mm/page_io.c */ | |
aca8bf32 | 292 | extern int swap_readpage(struct page *); |
1da177e4 | 293 | extern int swap_writepage(struct page *page, struct writeback_control *wbc); |
6712ecf8 | 294 | extern void end_swap_bio_read(struct bio *bio, int err); |
1da177e4 LT |
295 | |
296 | /* linux/mm/swap_state.c */ | |
297 | extern struct address_space swapper_space; | |
298 | #define total_swapcache_pages swapper_space.nrpages | |
299 | extern void show_swap_cache_info(void); | |
ac47b003 | 300 | extern int add_to_swap(struct page *); |
73b1262f | 301 | extern int add_to_swap_cache(struct page *, swp_entry_t, gfp_t); |
1da177e4 LT |
302 | extern void __delete_from_swap_cache(struct page *); |
303 | extern void delete_from_swap_cache(struct page *); | |
1da177e4 LT |
304 | extern void free_page_and_swap_cache(struct page *); |
305 | extern void free_pages_and_swap_cache(struct page **, int); | |
46017e95 | 306 | extern struct page *lookup_swap_cache(swp_entry_t); |
02098fea | 307 | extern struct page *read_swap_cache_async(swp_entry_t, gfp_t, |
46017e95 | 308 | struct vm_area_struct *vma, unsigned long addr); |
02098fea | 309 | extern struct page *swapin_readahead(swp_entry_t, gfp_t, |
46017e95 HD |
310 | struct vm_area_struct *vma, unsigned long addr); |
311 | ||
1da177e4 | 312 | /* linux/mm/swapfile.c */ |
b962716b | 313 | extern long nr_swap_pages; |
1da177e4 | 314 | extern long total_swap_pages; |
1da177e4 LT |
315 | extern void si_swapinfo(struct sysinfo *); |
316 | extern swp_entry_t get_swap_page(void); | |
f577eb30 | 317 | extern swp_entry_t get_swap_page_of_type(int); |
1da177e4 | 318 | extern int valid_swaphandles(swp_entry_t, unsigned long *); |
570a335b | 319 | extern int add_swap_count_continuation(swp_entry_t, gfp_t); |
aaa46865 | 320 | extern void swap_shmem_alloc(swp_entry_t); |
570a335b HD |
321 | extern int swap_duplicate(swp_entry_t); |
322 | extern int swapcache_prepare(swp_entry_t); | |
1da177e4 | 323 | extern void swap_free(swp_entry_t); |
cb4b86ba | 324 | extern void swapcache_free(swp_entry_t, struct page *page); |
2509ef26 | 325 | extern int free_swap_and_cache(swp_entry_t); |
7bf23687 | 326 | extern int swap_type_of(dev_t, sector_t, struct block_device **); |
f577eb30 | 327 | extern unsigned int count_swap_pages(int, int); |
f29ad6a9 | 328 | extern sector_t map_swap_page(swp_entry_t, struct block_device **); |
3aef83e0 | 329 | extern sector_t swapdev_block(int, pgoff_t); |
7b1fe597 | 330 | extern int reuse_swap_page(struct page *); |
a2c43eed | 331 | extern int try_to_free_swap(struct page *); |
1da177e4 LT |
332 | struct backing_dev_info; |
333 | ||
1da177e4 | 334 | /* linux/mm/thrash.c */ |
a5c9b696 HD |
335 | extern struct mm_struct *swap_token_mm; |
336 | extern void grab_swap_token(struct mm_struct *); | |
1da177e4 LT |
337 | extern void __put_swap_token(struct mm_struct *); |
338 | ||
339 | static inline int has_swap_token(struct mm_struct *mm) | |
340 | { | |
341 | return (mm == swap_token_mm); | |
342 | } | |
343 | ||
344 | static inline void put_swap_token(struct mm_struct *mm) | |
345 | { | |
346 | if (has_swap_token(mm)) | |
347 | __put_swap_token(mm); | |
348 | } | |
349 | ||
f7b7fd8f RR |
350 | static inline void disable_swap_token(void) |
351 | { | |
352 | put_swap_token(swap_token_mm); | |
353 | } | |
354 | ||
d13d1443 | 355 | #ifdef CONFIG_CGROUP_MEM_RES_CTLR |
8a9478ca KH |
356 | extern void |
357 | mem_cgroup_uncharge_swapcache(struct page *page, swp_entry_t ent, bool swapout); | |
d13d1443 | 358 | #else |
8c7c6e34 | 359 | static inline void |
8a9478ca | 360 | mem_cgroup_uncharge_swapcache(struct page *page, swp_entry_t ent, bool swapout) |
8c7c6e34 KH |
361 | { |
362 | } | |
363 | #endif | |
364 | #ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP | |
365 | extern void mem_cgroup_uncharge_swap(swp_entry_t ent); | |
366 | #else | |
367 | static inline void mem_cgroup_uncharge_swap(swp_entry_t ent) | |
d13d1443 KH |
368 | { |
369 | } | |
370 | #endif | |
371 | ||
1da177e4 LT |
372 | #else /* CONFIG_SWAP */ |
373 | ||
b962716b HD |
374 | #define nr_swap_pages 0L |
375 | #define total_swap_pages 0L | |
1da177e4 LT |
376 | #define total_swapcache_pages 0UL |
377 | ||
378 | #define si_swapinfo(val) \ | |
379 | do { (val)->freeswap = (val)->totalswap = 0; } while (0) | |
9ae5b3c7 OH |
380 | /* only sparc can not include linux/pagemap.h in this file |
381 | * so leave page_cache_release and release_pages undeclared... */ | |
1da177e4 LT |
382 | #define free_page_and_swap_cache(page) \ |
383 | page_cache_release(page) | |
384 | #define free_pages_and_swap_cache(pages, nr) \ | |
385 | release_pages((pages), (nr), 0); | |
386 | ||
bd96b9eb CK |
387 | static inline void show_swap_cache_info(void) |
388 | { | |
389 | } | |
390 | ||
2509ef26 | 391 | #define free_swap_and_cache(swp) is_migration_entry(swp) |
cb4b86ba | 392 | #define swapcache_prepare(swp) is_migration_entry(swp) |
bd96b9eb | 393 | |
570a335b | 394 | static inline int add_swap_count_continuation(swp_entry_t swp, gfp_t gfp_mask) |
355cfa73 | 395 | { |
570a335b HD |
396 | return 0; |
397 | } | |
398 | ||
aaa46865 HD |
399 | static inline void swap_shmem_alloc(swp_entry_t swp) |
400 | { | |
401 | } | |
402 | ||
570a335b HD |
403 | static inline int swap_duplicate(swp_entry_t swp) |
404 | { | |
405 | return 0; | |
355cfa73 KH |
406 | } |
407 | ||
bd96b9eb CK |
408 | static inline void swap_free(swp_entry_t swp) |
409 | { | |
410 | } | |
411 | ||
cb4b86ba KH |
412 | static inline void swapcache_free(swp_entry_t swp, struct page *page) |
413 | { | |
414 | } | |
415 | ||
02098fea | 416 | static inline struct page *swapin_readahead(swp_entry_t swp, gfp_t gfp_mask, |
bd96b9eb CK |
417 | struct vm_area_struct *vma, unsigned long addr) |
418 | { | |
419 | return NULL; | |
420 | } | |
421 | ||
9fab5619 HD |
422 | static inline int swap_writepage(struct page *p, struct writeback_control *wbc) |
423 | { | |
424 | return 0; | |
425 | } | |
426 | ||
bd96b9eb CK |
427 | static inline struct page *lookup_swap_cache(swp_entry_t swp) |
428 | { | |
429 | return NULL; | |
430 | } | |
431 | ||
60371d97 HD |
432 | static inline int add_to_swap(struct page *page) |
433 | { | |
434 | return 0; | |
435 | } | |
436 | ||
73b1262f HD |
437 | static inline int add_to_swap_cache(struct page *page, swp_entry_t entry, |
438 | gfp_t gfp_mask) | |
bd96b9eb | 439 | { |
73b1262f | 440 | return -1; |
bd96b9eb CK |
441 | } |
442 | ||
443 | static inline void __delete_from_swap_cache(struct page *page) | |
444 | { | |
445 | } | |
446 | ||
447 | static inline void delete_from_swap_cache(struct page *page) | |
448 | { | |
449 | } | |
450 | ||
7b1fe597 | 451 | #define reuse_swap_page(page) (page_mapcount(page) == 1) |
1da177e4 | 452 | |
a2c43eed | 453 | static inline int try_to_free_swap(struct page *page) |
68a22394 RR |
454 | { |
455 | return 0; | |
456 | } | |
457 | ||
1da177e4 LT |
458 | static inline swp_entry_t get_swap_page(void) |
459 | { | |
460 | swp_entry_t entry; | |
461 | entry.val = 0; | |
462 | return entry; | |
463 | } | |
464 | ||
465 | /* linux/mm/thrash.c */ | |
a5abeeac JW |
466 | static inline void put_swap_token(struct mm_struct *mm) |
467 | { | |
468 | } | |
469 | ||
470 | static inline void grab_swap_token(struct mm_struct *mm) | |
471 | { | |
472 | } | |
473 | ||
474 | static inline int has_swap_token(struct mm_struct *mm) | |
475 | { | |
476 | return 0; | |
477 | } | |
478 | ||
479 | static inline void disable_swap_token(void) | |
480 | { | |
481 | } | |
1da177e4 | 482 | |
e767e056 DN |
483 | static inline void |
484 | mem_cgroup_uncharge_swapcache(struct page *page, swp_entry_t ent) | |
485 | { | |
486 | } | |
487 | ||
1da177e4 LT |
488 | #endif /* CONFIG_SWAP */ |
489 | #endif /* __KERNEL__*/ | |
490 | #endif /* _LINUX_SWAP_H */ |