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_release_nonlru(struct pagevec
*pvec
);
25 void __pagevec_free(struct pagevec
*pvec
);
26 void ____pagevec_lru_add(struct pagevec
*pvec
, enum lru_list lru
);
27 void pagevec_strip(struct pagevec
*pvec
);
28 void pagevec_swap_free(struct pagevec
*pvec
);
29 unsigned pagevec_lookup(struct pagevec
*pvec
, struct address_space
*mapping
,
30 pgoff_t start
, unsigned nr_pages
);
31 unsigned pagevec_lookup_tag(struct pagevec
*pvec
,
32 struct address_space
*mapping
, pgoff_t
*index
, int tag
,
35 static inline void pagevec_init(struct pagevec
*pvec
, int cold
)
41 static inline void pagevec_reinit(struct pagevec
*pvec
)
46 static inline unsigned pagevec_count(struct pagevec
*pvec
)
51 static inline unsigned pagevec_space(struct pagevec
*pvec
)
53 return PAGEVEC_SIZE
- pvec
->nr
;
57 * Add a page to a pagevec. Returns the number of slots still available.
59 static inline unsigned pagevec_add(struct pagevec
*pvec
, struct page
*page
)
61 pvec
->pages
[pvec
->nr
++] = page
;
62 return pagevec_space(pvec
);
66 static inline void pagevec_release(struct pagevec
*pvec
)
68 if (pagevec_count(pvec
))
69 __pagevec_release(pvec
);
72 static inline void pagevec_release_nonlru(struct pagevec
*pvec
)
74 if (pagevec_count(pvec
))
75 __pagevec_release_nonlru(pvec
);
78 static inline void pagevec_free(struct pagevec
*pvec
)
80 if (pagevec_count(pvec
))
84 static inline void __pagevec_lru_add(struct pagevec
*pvec
)
86 ____pagevec_lru_add(pvec
, LRU_INACTIVE
);
89 static inline void __pagevec_lru_add_active(struct pagevec
*pvec
)
91 ____pagevec_lru_add(pvec
, LRU_ACTIVE
);
94 static inline void pagevec_lru_add(struct pagevec
*pvec
)
96 if (pagevec_count(pvec
))
97 __pagevec_lru_add(pvec
);
100 #endif /* _LINUX_PAGEVEC_H */