git://bbs.cooldavid.org / net-next-2.6.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 LT |
26 | void pagevec_strip(struct pagevec *pvec); |
| 27 | unsigned pagevec_lookup(struct pagevec *pvec, struct address_space *mapping, | |
| 28 | pgoff_t start, unsigned nr_pages); | |
| 29 | unsigned pagevec_lookup_tag(struct pagevec *pvec, | |
| 30 | struct address_space *mapping, pgoff_t *index, int tag, | |
| 31 | unsigned nr_pages); | |
| 32 | ||
| 33 | static inline void pagevec_init(struct pagevec *pvec, int cold) | |
| 34 | { | |
| 35 | pvec->nr = 0; | |
| 36 | pvec->cold = cold; | |
| 37 | } | |
| 38 | ||
| 39 | static inline void pagevec_reinit(struct pagevec *pvec) | |
| 40 | { | |
| 41 | pvec->nr = 0; | |
| 42 | } | |
| 43 | ||
| 44 | static inline unsigned pagevec_count(struct pagevec *pvec) | |
| 45 | { | |
| 46 | return pvec->nr; | |
| 47 | } | |
| 48 | ||
| 49 | static inline unsigned pagevec_space(struct pagevec *pvec) | |
| 50 | { | |
| 51 | return PAGEVEC_SIZE - pvec->nr; | |
| 52 | } | |
| 53 | ||
| 54 | /* | |
| 55 | * Add a page to a pagevec. Returns the number of slots still available. | |
| 56 | */ | |
| 57 | static inline unsigned pagevec_add(struct pagevec *pvec, struct page *page) | |
| 58 | { | |
| 59 | pvec->pages[pvec->nr++] = page; | |
| 60 | return pagevec_space(pvec); | |
| 61 | } | |
| 62 | ||
| 63 | ||
| 64 | static inline void pagevec_release(struct pagevec *pvec) | |
| 65 | { | |
| 66 | if (pagevec_count(pvec)) | |
| 67 | __pagevec_release(pvec); | |
| 68 | } | |
| 69 | ||
| 1da177e4 LT |
70 | static inline void pagevec_free(struct pagevec *pvec) |
| 71 | { | |
| 72 | if (pagevec_count(pvec)) | |
| 73 | __pagevec_free(pvec); | |
| 74 | } | |
| 75 | ||
| 4f98a2fe | 76 | static inline void __pagevec_lru_add_anon(struct pagevec *pvec) |
| f04e9ebb | 77 | { |
| 4f98a2fe | 78 | ____pagevec_lru_add(pvec, LRU_INACTIVE_ANON); |
| f04e9ebb KM |
79 | } |
| 80 | ||
| 4f98a2fe | 81 | static inline void __pagevec_lru_add_active_anon(struct pagevec *pvec) |
| f04e9ebb | 82 | { |
| 4f98a2fe | 83 | ____pagevec_lru_add(pvec, LRU_ACTIVE_ANON); |
| f04e9ebb KM |
84 | } |
| 85 | ||
| 4f98a2fe RR |
86 | static inline void __pagevec_lru_add_file(struct pagevec *pvec) |
| 87 | { | |
| 88 | ____pagevec_lru_add(pvec, LRU_INACTIVE_FILE); | |
| 89 | } | |
| 90 | ||
| 91 | static inline void __pagevec_lru_add_active_file(struct pagevec *pvec) | |
| 92 | { | |
| 93 | ____pagevec_lru_add(pvec, LRU_ACTIVE_FILE); | |
| 94 | } | |
| 95 | ||
| 4f98a2fe RR |
96 | static inline void pagevec_lru_add_file(struct pagevec *pvec) |
| 97 | { | |
| 98 | if (pagevec_count(pvec)) | |
| 99 | __pagevec_lru_add_file(pvec); | |
| 100 | } | |
| 101 | ||
| 102 | static inline void pagevec_lru_add_anon(struct pagevec *pvec) | |
| 1da177e4 LT |
103 | { |
| 104 | if (pagevec_count(pvec)) | |
| 4f98a2fe | 105 | __pagevec_lru_add_anon(pvec); |
| 1da177e4 | 106 | } |
| 78854014 DH |
107 | |
| 108 | #endif /* _LINUX_PAGEVEC_H */ |