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
);
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
,
31 static inline void pagevec_init(struct pagevec
*pvec
, int cold
)
37 static inline void pagevec_reinit(struct pagevec
*pvec
)
42 static inline unsigned pagevec_count(struct pagevec
*pvec
)
47 static inline unsigned pagevec_space(struct pagevec
*pvec
)
49 return PAGEVEC_SIZE
- pvec
->nr
;
53 * Add a page to a pagevec. Returns the number of slots still available.
55 static inline unsigned pagevec_add(struct pagevec
*pvec
, struct page
*page
)
57 pvec
->pages
[pvec
->nr
++] = page
;
58 return pagevec_space(pvec
);
61 static inline void pagevec_release(struct pagevec
*pvec
)
63 if (pagevec_count(pvec
))
64 __pagevec_release(pvec
);
67 #endif /* _LINUX_PAGEVEC_H */