1 /* SPDX-License-Identifier: GPL-2.0 */
3 * include/linux/pagevec.h
5 * In many places it is efficient to batch an operation up against multiple
6 * pages. A pagevec is a multipage container which is used for that.
9 #ifndef _LINUX_PAGEVEC_H
10 #define _LINUX_PAGEVEC_H
12 /* 14 pointers + two long's align the pagevec structure to a power of two */
13 #define PAGEVEC_SIZE 14
21 struct page *pages[PAGEVEC_SIZE];
24 void __pagevec_release(struct pagevec *pvec);
25 void __pagevec_lru_add(struct pagevec *pvec);
26 unsigned pagevec_lookup_entries(struct pagevec *pvec,
27 struct address_space *mapping,
28 pgoff_t start, unsigned nr_entries,
30 void pagevec_remove_exceptionals(struct pagevec *pvec);
31 unsigned pagevec_lookup_range(struct pagevec *pvec,
32 struct address_space *mapping,
33 pgoff_t *start, pgoff_t end);
34 static inline unsigned pagevec_lookup(struct pagevec *pvec,
35 struct address_space *mapping,
38 return pagevec_lookup_range(pvec, mapping, start, (pgoff_t)-1);
41 unsigned pagevec_lookup_tag(struct pagevec *pvec,
42 struct address_space *mapping, pgoff_t *index, int tag,
45 static inline void pagevec_init(struct pagevec *pvec, int cold)
51 static inline void pagevec_reinit(struct pagevec *pvec)
56 static inline unsigned pagevec_count(struct pagevec *pvec)
61 static inline unsigned pagevec_space(struct pagevec *pvec)
63 return PAGEVEC_SIZE - pvec->nr;
67 * Add a page to a pagevec. Returns the number of slots still available.
69 static inline unsigned pagevec_add(struct pagevec *pvec, struct page *page)
71 pvec->pages[pvec->nr++] = page;
72 return pagevec_space(pvec);
75 static inline void pagevec_release(struct pagevec *pvec)
77 if (pagevec_count(pvec))
78 __pagevec_release(pvec);
81 #endif /* _LINUX_PAGEVEC_H */