2 * include/linux/pagevec.h
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.
8 #ifndef _LINUX_PAGEVEC_H
9 #define _LINUX_PAGEVEC_H
11 /* 14 pointers + two long's align the pagevec structure to a power of two */
12 #define PAGEVEC_SIZE 14
20 struct page *pages[PAGEVEC_SIZE];
23 void __pagevec_release(struct pagevec *pvec);
24 void __pagevec_release_nonlru(struct pagevec *pvec);
25 void __pagevec_free(struct pagevec *pvec);
26 void ____pagevec_lru_add(struct pagevec *pvec, enum lru_list lru);
27 void pagevec_strip(struct pagevec *pvec);
28 void pagevec_swap_free(struct pagevec *pvec);
29 unsigned pagevec_lookup(struct pagevec *pvec, struct address_space *mapping,
30 pgoff_t start, unsigned nr_pages);
31 unsigned pagevec_lookup_tag(struct pagevec *pvec,
32 struct address_space *mapping, pgoff_t *index, int tag,
35 static inline void pagevec_init(struct pagevec *pvec, int cold)
41 static inline void pagevec_reinit(struct pagevec *pvec)
46 static inline unsigned pagevec_count(struct pagevec *pvec)
51 static inline unsigned pagevec_space(struct pagevec *pvec)
53 return PAGEVEC_SIZE - pvec->nr;
57 * Add a page to a pagevec. Returns the number of slots still available.
59 static inline unsigned pagevec_add(struct pagevec *pvec, struct page *page)
61 pvec->pages[pvec->nr++] = page;
62 return pagevec_space(pvec);
66 static inline void pagevec_release(struct pagevec *pvec)
68 if (pagevec_count(pvec))
69 __pagevec_release(pvec);
72 static inline void pagevec_release_nonlru(struct pagevec *pvec)
74 if (pagevec_count(pvec))
75 __pagevec_release_nonlru(pvec);
78 static inline void pagevec_free(struct pagevec *pvec)
80 if (pagevec_count(pvec))
84 static inline void __pagevec_lru_add_anon(struct pagevec *pvec)
86 ____pagevec_lru_add(pvec, LRU_INACTIVE_ANON);
89 static inline void __pagevec_lru_add_active_anon(struct pagevec *pvec)
91 ____pagevec_lru_add(pvec, LRU_ACTIVE_ANON);
94 static inline void __pagevec_lru_add_file(struct pagevec *pvec)
96 ____pagevec_lru_add(pvec, LRU_INACTIVE_FILE);
99 static inline void __pagevec_lru_add_active_file(struct pagevec *pvec)
101 ____pagevec_lru_add(pvec, LRU_ACTIVE_FILE);
104 static inline void pagevec_lru_add_file(struct pagevec *pvec)
106 if (pagevec_count(pvec))
107 __pagevec_lru_add_file(pvec);
110 static inline void pagevec_lru_add_anon(struct pagevec *pvec)
112 if (pagevec_count(pvec))
113 __pagevec_lru_add_anon(pvec);
116 #endif /* _LINUX_PAGEVEC_H */