projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* |
| 2 | * include/linux/pagevec.h | |
| 3 | * | |
| 4 | * In many places it is efficient to batch an operation up against multiple | |
| 5 | * pages. A pagevec is a multipage container which is used for that. | |
| 6 | */ | |
| 7 | ||
| 78854014 DH |
8 | #ifndef _LINUX_PAGEVEC_H |
| 9 | #define _LINUX_PAGEVEC_H | |
| 10 | ||
| 1da177e4 LT |
11 | /* 14 pointers + two long's align the pagevec structure to a power of two */ |
| 12 | #define PAGEVEC_SIZE 14 | |
| 13 | ||
| 14 | struct page; | |
| 15 | struct address_space; | |
| 16 | ||
| 17 | struct pagevec { | |
| 18 | unsigned long nr; | |
| 19 | unsigned long cold; | |
| 20 | struct page *pages[PAGEVEC_SIZE]; | |
| 21 | }; | |
| 22 | ||
| 23 | void __pagevec_release(struct pagevec *pvec); | |
| 1da177e4 | 24 | void __pagevec_free(struct pagevec *pvec); |
| f04e9ebb | 25 | void ____pagevec_lru_add(struct pagevec *pvec, enum lru_list lru); |
| 1da177e4 | 26 | void pagevec_strip(struct pagevec *pvec); |
| 68a22394 | 27 | void pagevec_swap_free(struct pagevec *pvec); |
| 1da177e4 LT |
28 | unsigned pagevec_lookup(struct pagevec *pvec, struct address_space *mapping, |
| 29 | pgoff_t start, unsigned nr_pages); | |
| 30 | unsigned pagevec_lookup_tag(struct pagevec *pvec, | |
| 31 | struct address_space *mapping, pgoff_t *index, int tag, | |
| 32 | unsigned nr_pages); | |
| 33 | ||
| 34 | static inline void pagevec_init(struct pagevec *pvec, int cold) | |
| 35 | { | |
| 36 | pvec->nr = 0; | |
| 37 | pvec->cold = cold; | |
| 38 | } | |
| 39 | ||
| 40 | static inline void pagevec_reinit(struct pagevec *pvec) | |
| 41 | { | |
| 42 | pvec->nr = 0; | |
| 43 | } | |
| 44 | ||
| 45 | static inline unsigned pagevec_count(struct pagevec *pvec) | |
| 46 | { | |
| 47 | return pvec->nr; | |
| 48 | } | |
| 49 | ||
| 50 | static inline unsigned pagevec_space(struct pagevec *pvec) | |
| 51 | { | |
| 52 | return PAGEVEC_SIZE - pvec->nr; | |
| 53 | } | |
| 54 | ||
| 55 | /* | |
| 56 | * Add a page to a pagevec. Returns the number of slots still available. | |
| 57 | */ | |
| 58 | static inline unsigned pagevec_add(struct pagevec *pvec, struct page *page) | |
| 59 | { | |
| 60 | pvec->pages[pvec->nr++] = page; | |
| 61 | return pagevec_space(pvec); | |
| 62 | } | |
| 63 | ||
| 64 | ||
| 65 | static inline void pagevec_release(struct pagevec *pvec) | |
| 66 | { | |
| 67 | if (pagevec_count(pvec)) | |
| 68 | __pagevec_release(pvec); | |
| 69 | } | |
| 70 | ||
| 1da177e4 LT |
71 | static inline void pagevec_free(struct pagevec *pvec) |
| 72 | { | |
| 73 | if (pagevec_count(pvec)) | |
| 74 | __pagevec_free(pvec); | |
| 75 | } | |
| 76 | ||
| 4f98a2fe | 77 | static inline void __pagevec_lru_add_anon(struct pagevec *pvec) |
| f04e9ebb | 78 | { |
| 4f98a2fe | 79 | ____pagevec_lru_add(pvec, LRU_INACTIVE_ANON); |
| f04e9ebb KM |
80 | } |
| 81 | ||
| 4f98a2fe | 82 | static inline void __pagevec_lru_add_active_anon(struct pagevec *pvec) |
| f04e9ebb | 83 | { |
| 4f98a2fe | 84 | ____pagevec_lru_add(pvec, LRU_ACTIVE_ANON); |
| f04e9ebb KM |
85 | } |
| 86 | ||
| 4f98a2fe RR |
87 | static inline void __pagevec_lru_add_file(struct pagevec *pvec) |
| 88 | { | |
| 89 | ____pagevec_lru_add(pvec, LRU_INACTIVE_FILE); | |
| 90 | } | |
| 91 | ||
| 92 | static inline void __pagevec_lru_add_active_file(struct pagevec *pvec) | |
| 93 | { | |
| 94 | ____pagevec_lru_add(pvec, LRU_ACTIVE_FILE); | |
| 95 | } | |
| 96 | ||
| 4f98a2fe RR |
97 | static inline void pagevec_lru_add_file(struct pagevec *pvec) |
| 98 | { | |
| 99 | if (pagevec_count(pvec)) | |
| 100 | __pagevec_lru_add_file(pvec); | |
| 101 | } | |
| 102 | ||
| 103 | static inline void pagevec_lru_add_anon(struct pagevec *pvec) | |
| 1da177e4 LT |
104 | { |
| 105 | if (pagevec_count(pvec)) | |
| 4f98a2fe | 106 | __pagevec_lru_add_anon(pvec); |
| 1da177e4 | 107 | } |
| 78854014 DH |
108 | |
| 109 | #endif /* _LINUX_PAGEVEC_H */ |