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_lru_add(struct pagevec *pvec, enum lru_list lru);
25 void pagevec_strip(struct pagevec *pvec);
26 unsigned pagevec_lookup(struct pagevec *pvec, struct address_space *mapping,
27 pgoff_t start, unsigned nr_pages);
28 unsigned pagevec_lookup_tag(struct pagevec *pvec,
29 struct address_space *mapping, pgoff_t *index, int tag,
32 static inline void pagevec_init(struct pagevec *pvec, int cold)
38 static inline void pagevec_reinit(struct pagevec *pvec)
43 static inline unsigned pagevec_count(struct pagevec *pvec)
48 static inline unsigned pagevec_space(struct pagevec *pvec)
50 return PAGEVEC_SIZE - pvec->nr;
54 * Add a page to a pagevec. Returns the number of slots still available.
56 static inline unsigned pagevec_add(struct pagevec *pvec, struct page *page)
58 pvec->pages[pvec->nr++] = page;
59 return pagevec_space(pvec);
63 static inline void pagevec_release(struct pagevec *pvec)
65 if (pagevec_count(pvec))
66 __pagevec_release(pvec);
69 static inline void __pagevec_lru_add_anon(struct pagevec *pvec)
71 ____pagevec_lru_add(pvec, LRU_INACTIVE_ANON);
74 static inline void __pagevec_lru_add_active_anon(struct pagevec *pvec)
76 ____pagevec_lru_add(pvec, LRU_ACTIVE_ANON);
79 static inline void __pagevec_lru_add_file(struct pagevec *pvec)
81 ____pagevec_lru_add(pvec, LRU_INACTIVE_FILE);
84 static inline void __pagevec_lru_add_active_file(struct pagevec *pvec)
86 ____pagevec_lru_add(pvec, LRU_ACTIVE_FILE);
89 static inline void pagevec_lru_add_file(struct pagevec *pvec)
91 if (pagevec_count(pvec))
92 __pagevec_lru_add_file(pvec);
95 static inline void pagevec_lru_add_anon(struct pagevec *pvec)
97 if (pagevec_count(pvec))
98 __pagevec_lru_add_anon(pvec);
101 #endif /* _LINUX_PAGEVEC_H */