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_free(struct pagevec
*pvec
);
25 void ____pagevec_lru_add(struct pagevec
*pvec
, enum lru_list lru
);
26 void pagevec_strip(struct pagevec
*pvec
);
27 unsigned pagevec_lookup(struct pagevec
*pvec
, struct address_space
*mapping
,
28 pgoff_t start
, unsigned nr_pages
);
29 unsigned pagevec_lookup_tag(struct pagevec
*pvec
,
30 struct address_space
*mapping
, pgoff_t
*index
, int tag
,
33 static inline void pagevec_init(struct pagevec
*pvec
, int cold
)
39 static inline void pagevec_reinit(struct pagevec
*pvec
)
44 static inline unsigned pagevec_count(struct pagevec
*pvec
)
49 static inline unsigned pagevec_space(struct pagevec
*pvec
)
51 return PAGEVEC_SIZE
- pvec
->nr
;
55 * Add a page to a pagevec. Returns the number of slots still available.
57 static inline unsigned pagevec_add(struct pagevec
*pvec
, struct page
*page
)
59 pvec
->pages
[pvec
->nr
++] = page
;
60 return pagevec_space(pvec
);
64 static inline void pagevec_release(struct pagevec
*pvec
)
66 if (pagevec_count(pvec
))
67 __pagevec_release(pvec
);
70 static inline void pagevec_free(struct pagevec
*pvec
)
72 if (pagevec_count(pvec
))
76 static inline void __pagevec_lru_add_anon(struct pagevec
*pvec
)
78 ____pagevec_lru_add(pvec
, LRU_INACTIVE_ANON
);
81 static inline void __pagevec_lru_add_active_anon(struct pagevec
*pvec
)
83 ____pagevec_lru_add(pvec
, LRU_ACTIVE_ANON
);
86 static inline void __pagevec_lru_add_file(struct pagevec
*pvec
)
88 ____pagevec_lru_add(pvec
, LRU_INACTIVE_FILE
);
91 static inline void __pagevec_lru_add_active_file(struct pagevec
*pvec
)
93 ____pagevec_lru_add(pvec
, LRU_ACTIVE_FILE
);
96 static inline void pagevec_lru_add_file(struct pagevec
*pvec
)
98 if (pagevec_count(pvec
))
99 __pagevec_lru_add_file(pvec
);
102 static inline void pagevec_lru_add_anon(struct pagevec
*pvec
)
104 if (pagevec_count(pvec
))
105 __pagevec_lru_add_anon(pvec
);
108 #endif /* _LINUX_PAGEVEC_H */
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