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); | |
5095ae83 | 24 | void __pagevec_lru_add(struct pagevec *pvec, enum lru_list lru); |
1da177e4 LT |
25 | unsigned pagevec_lookup(struct pagevec *pvec, struct address_space *mapping, |
26 | pgoff_t start, unsigned nr_pages); | |
27 | unsigned pagevec_lookup_tag(struct pagevec *pvec, | |
28 | struct address_space *mapping, pgoff_t *index, int tag, | |
29 | unsigned nr_pages); | |
30 | ||
31 | static inline void pagevec_init(struct pagevec *pvec, int cold) | |
32 | { | |
33 | pvec->nr = 0; | |
34 | pvec->cold = cold; | |
35 | } | |
36 | ||
37 | static inline void pagevec_reinit(struct pagevec *pvec) | |
38 | { | |
39 | pvec->nr = 0; | |
40 | } | |
41 | ||
42 | static inline unsigned pagevec_count(struct pagevec *pvec) | |
43 | { | |
44 | return pvec->nr; | |
45 | } | |
46 | ||
47 | static inline unsigned pagevec_space(struct pagevec *pvec) | |
48 | { | |
49 | return PAGEVEC_SIZE - pvec->nr; | |
50 | } | |
51 | ||
52 | /* | |
53 | * Add a page to a pagevec. Returns the number of slots still available. | |
54 | */ | |
55 | static inline unsigned pagevec_add(struct pagevec *pvec, struct page *page) | |
56 | { | |
57 | pvec->pages[pvec->nr++] = page; | |
58 | return pagevec_space(pvec); | |
59 | } | |
60 | ||
1da177e4 LT |
61 | static inline void pagevec_release(struct pagevec *pvec) |
62 | { | |
63 | if (pagevec_count(pvec)) | |
64 | __pagevec_release(pvec); | |
65 | } | |
66 | ||
4f98a2fe | 67 | static inline void __pagevec_lru_add_anon(struct pagevec *pvec) |
f04e9ebb | 68 | { |
5095ae83 | 69 | __pagevec_lru_add(pvec, LRU_INACTIVE_ANON); |
f04e9ebb KM |
70 | } |
71 | ||
4f98a2fe | 72 | static inline void __pagevec_lru_add_active_anon(struct pagevec *pvec) |
f04e9ebb | 73 | { |
5095ae83 | 74 | __pagevec_lru_add(pvec, LRU_ACTIVE_ANON); |
f04e9ebb KM |
75 | } |
76 | ||
4f98a2fe RR |
77 | static inline void __pagevec_lru_add_file(struct pagevec *pvec) |
78 | { | |
5095ae83 | 79 | __pagevec_lru_add(pvec, LRU_INACTIVE_FILE); |
4f98a2fe RR |
80 | } |
81 | ||
82 | static inline void __pagevec_lru_add_active_file(struct pagevec *pvec) | |
83 | { | |
5095ae83 | 84 | __pagevec_lru_add(pvec, LRU_ACTIVE_FILE); |
4f98a2fe RR |
85 | } |
86 | ||
4f98a2fe RR |
87 | static inline void pagevec_lru_add_file(struct pagevec *pvec) |
88 | { | |
89 | if (pagevec_count(pvec)) | |
90 | __pagevec_lru_add_file(pvec); | |
91 | } | |
92 | ||
93 | static inline void pagevec_lru_add_anon(struct pagevec *pvec) | |
1da177e4 LT |
94 | { |
95 | if (pagevec_count(pvec)) | |
4f98a2fe | 96 | __pagevec_lru_add_anon(pvec); |
1da177e4 | 97 | } |
78854014 DH |
98 | |
99 | #endif /* _LINUX_PAGEVEC_H */ |