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git.proxmox.com Git - mirror_ubuntu-zesty-kernel.git/blob - include/linux/pagevec.h
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
, enum lru_list lru
);
25 void pagevec_strip(struct pagevec
*pvec
);
26 unsigned pagevec_lookup(struct pagevec
*pvec
, struct address_space
*mapping
,
27 pgoff_t start
, unsigned nr_pages
);
28 unsigned pagevec_lookup_tag(struct pagevec
*pvec
,
29 struct address_space
*mapping
, pgoff_t
*index
, int tag
,
32 static inline void pagevec_init(struct pagevec
*pvec
, int cold
)
38 static inline void pagevec_reinit(struct pagevec
*pvec
)
43 static inline unsigned pagevec_count(struct pagevec
*pvec
)
48 static inline unsigned pagevec_space(struct pagevec
*pvec
)
50 return PAGEVEC_SIZE
- pvec
->nr
;
54 * Add a page to a pagevec. Returns the number of slots still available.
56 static inline unsigned pagevec_add(struct pagevec
*pvec
, struct page
*page
)
58 pvec
->pages
[pvec
->nr
++] = page
;
59 return pagevec_space(pvec
);
63 static inline void pagevec_release(struct pagevec
*pvec
)
65 if (pagevec_count(pvec
))
66 __pagevec_release(pvec
);
69 static inline void __pagevec_lru_add_anon(struct pagevec
*pvec
)
71 ____pagevec_lru_add(pvec
, LRU_INACTIVE_ANON
);
74 static inline void __pagevec_lru_add_active_anon(struct pagevec
*pvec
)
76 ____pagevec_lru_add(pvec
, LRU_ACTIVE_ANON
);
79 static inline void __pagevec_lru_add_file(struct pagevec
*pvec
)
81 ____pagevec_lru_add(pvec
, LRU_INACTIVE_FILE
);
84 static inline void __pagevec_lru_add_active_file(struct pagevec
*pvec
)
86 ____pagevec_lru_add(pvec
, LRU_ACTIVE_FILE
);
89 static inline void pagevec_lru_add_file(struct pagevec
*pvec
)
91 if (pagevec_count(pvec
))
92 __pagevec_lru_add_file(pvec
);
95 static inline void pagevec_lru_add_anon(struct pagevec
*pvec
)
97 if (pagevec_count(pvec
))
98 __pagevec_lru_add_anon(pvec
);
101 #endif /* _LINUX_PAGEVEC_H */