Linux kernel mirror (for testing)
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linux
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
8#ifndef _LINUX_PAGEVEC_H
9#define _LINUX_PAGEVEC_H
10
11/* 14 pointers + two long's align the pagevec structure to a power of two */
12#define PAGEVEC_SIZE 14
13
14struct page;
15struct address_space;
16
17struct pagevec {
18 unsigned long nr;
19 unsigned long cold;
20 struct page *pages[PAGEVEC_SIZE];
21};
22
23void __pagevec_release(struct pagevec *pvec);
24void __pagevec_free(struct pagevec *pvec);
25void ____pagevec_lru_add(struct pagevec *pvec, enum lru_list lru);
26void pagevec_strip(struct pagevec *pvec);
27void pagevec_swap_free(struct pagevec *pvec);
28unsigned pagevec_lookup(struct pagevec *pvec, struct address_space *mapping,
29 pgoff_t start, unsigned nr_pages);
30unsigned pagevec_lookup_tag(struct pagevec *pvec,
31 struct address_space *mapping, pgoff_t *index, int tag,
32 unsigned nr_pages);
33
34static inline void pagevec_init(struct pagevec *pvec, int cold)
35{
36 pvec->nr = 0;
37 pvec->cold = cold;
38}
39
40static inline void pagevec_reinit(struct pagevec *pvec)
41{
42 pvec->nr = 0;
43}
44
45static inline unsigned pagevec_count(struct pagevec *pvec)
46{
47 return pvec->nr;
48}
49
50static 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 */
58static 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
65static inline void pagevec_release(struct pagevec *pvec)
66{
67 if (pagevec_count(pvec))
68 __pagevec_release(pvec);
69}
70
71static inline void pagevec_free(struct pagevec *pvec)
72{
73 if (pagevec_count(pvec))
74 __pagevec_free(pvec);
75}
76
77static inline void __pagevec_lru_add_anon(struct pagevec *pvec)
78{
79 ____pagevec_lru_add(pvec, LRU_INACTIVE_ANON);
80}
81
82static inline void __pagevec_lru_add_active_anon(struct pagevec *pvec)
83{
84 ____pagevec_lru_add(pvec, LRU_ACTIVE_ANON);
85}
86
87static inline void __pagevec_lru_add_file(struct pagevec *pvec)
88{
89 ____pagevec_lru_add(pvec, LRU_INACTIVE_FILE);
90}
91
92static inline void __pagevec_lru_add_active_file(struct pagevec *pvec)
93{
94 ____pagevec_lru_add(pvec, LRU_ACTIVE_FILE);
95}
96
97static inline void pagevec_lru_add_file(struct pagevec *pvec)
98{
99 if (pagevec_count(pvec))
100 __pagevec_lru_add_file(pvec);
101}
102
103static inline void pagevec_lru_add_anon(struct pagevec *pvec)
104{
105 if (pagevec_count(pvec))
106 __pagevec_lru_add_anon(pvec);
107}
108
109#endif /* _LINUX_PAGEVEC_H */