2636c0c0f279333959f2155adc4995d527257f9d
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 */