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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
2 | /* |
3 | * include/linux/pagevec.h | |
4 | * | |
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. | |
7 | */ | |
8 | ||
78854014 DH |
9 | #ifndef _LINUX_PAGEVEC_H |
10 | #define _LINUX_PAGEVEC_H | |
11 | ||
10bbd235 MW |
12 | #include <linux/xarray.h> |
13 | ||
146500e9 MW |
14 | /* 15 pointers + header align the pagevec structure to a power of two */ |
15 | #define PAGEVEC_SIZE 15 | |
1da177e4 LT |
16 | |
17 | struct page; | |
18 | struct address_space; | |
19 | ||
20 | struct pagevec { | |
146500e9 | 21 | unsigned char nr; |
7f0b5fb9 | 22 | bool percpu_pvec_drained; |
1da177e4 LT |
23 | struct page *pages[PAGEVEC_SIZE]; |
24 | }; | |
25 | ||
26 | void __pagevec_release(struct pagevec *pvec); | |
a0b8cab3 | 27 | void __pagevec_lru_add(struct pagevec *pvec); |
0cd6144a | 28 | void pagevec_remove_exceptionals(struct pagevec *pvec); |
b947cee4 JK |
29 | unsigned pagevec_lookup_range(struct pagevec *pvec, |
30 | struct address_space *mapping, | |
397162ff | 31 | pgoff_t *start, pgoff_t end); |
b947cee4 JK |
32 | static inline unsigned pagevec_lookup(struct pagevec *pvec, |
33 | struct address_space *mapping, | |
397162ff | 34 | pgoff_t *start) |
b947cee4 | 35 | { |
397162ff | 36 | return pagevec_lookup_range(pvec, mapping, start, (pgoff_t)-1); |
b947cee4 JK |
37 | } |
38 | ||
72b045ae JK |
39 | unsigned pagevec_lookup_range_tag(struct pagevec *pvec, |
40 | struct address_space *mapping, pgoff_t *index, pgoff_t end, | |
10bbd235 | 41 | xa_mark_t tag); |
72b045ae | 42 | static inline unsigned pagevec_lookup_tag(struct pagevec *pvec, |
10bbd235 | 43 | struct address_space *mapping, pgoff_t *index, xa_mark_t tag) |
72b045ae | 44 | { |
67fd707f | 45 | return pagevec_lookup_range_tag(pvec, mapping, index, (pgoff_t)-1, tag); |
72b045ae | 46 | } |
1da177e4 | 47 | |
86679820 | 48 | static inline void pagevec_init(struct pagevec *pvec) |
1da177e4 LT |
49 | { |
50 | pvec->nr = 0; | |
7f0b5fb9 | 51 | pvec->percpu_pvec_drained = false; |
1da177e4 LT |
52 | } |
53 | ||
54 | static inline void pagevec_reinit(struct pagevec *pvec) | |
55 | { | |
56 | pvec->nr = 0; | |
57 | } | |
58 | ||
59 | static inline unsigned pagevec_count(struct pagevec *pvec) | |
60 | { | |
61 | return pvec->nr; | |
62 | } | |
63 | ||
64 | static inline unsigned pagevec_space(struct pagevec *pvec) | |
65 | { | |
66 | return PAGEVEC_SIZE - pvec->nr; | |
67 | } | |
68 | ||
69 | /* | |
70 | * Add a page to a pagevec. Returns the number of slots still available. | |
71 | */ | |
72 | static inline unsigned pagevec_add(struct pagevec *pvec, struct page *page) | |
73 | { | |
74 | pvec->pages[pvec->nr++] = page; | |
75 | return pagevec_space(pvec); | |
76 | } | |
77 | ||
1da177e4 LT |
78 | static inline void pagevec_release(struct pagevec *pvec) |
79 | { | |
80 | if (pagevec_count(pvec)) | |
81 | __pagevec_release(pvec); | |
82 | } | |
83 | ||
78854014 | 84 | #endif /* _LINUX_PAGEVEC_H */ |