]>
git.proxmox.com Git - mirror_ubuntu-jammy-kernel.git/blob - include/linux/pagevec.h
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 #include <linux/xarray.h>
14 /* 15 pointers + header align the pagevec structure to a power of two */
15 #define PAGEVEC_SIZE 15
22 bool percpu_pvec_drained
;
23 struct page
*pages
[PAGEVEC_SIZE
];
26 void __pagevec_release(struct pagevec
*pvec
);
27 void __pagevec_lru_add(struct pagevec
*pvec
);
28 unsigned pagevec_lookup_entries(struct pagevec
*pvec
,
29 struct address_space
*mapping
,
30 pgoff_t start
, unsigned nr_entries
,
32 void pagevec_remove_exceptionals(struct pagevec
*pvec
);
33 unsigned pagevec_lookup_range(struct pagevec
*pvec
,
34 struct address_space
*mapping
,
35 pgoff_t
*start
, pgoff_t end
);
36 static inline unsigned pagevec_lookup(struct pagevec
*pvec
,
37 struct address_space
*mapping
,
40 return pagevec_lookup_range(pvec
, mapping
, start
, (pgoff_t
)-1);
43 unsigned pagevec_lookup_range_tag(struct pagevec
*pvec
,
44 struct address_space
*mapping
, pgoff_t
*index
, pgoff_t end
,
46 unsigned pagevec_lookup_range_nr_tag(struct pagevec
*pvec
,
47 struct address_space
*mapping
, pgoff_t
*index
, pgoff_t end
,
48 xa_mark_t tag
, unsigned max_pages
);
49 static inline unsigned pagevec_lookup_tag(struct pagevec
*pvec
,
50 struct address_space
*mapping
, pgoff_t
*index
, xa_mark_t tag
)
52 return pagevec_lookup_range_tag(pvec
, mapping
, index
, (pgoff_t
)-1, tag
);
55 static inline void pagevec_init(struct pagevec
*pvec
)
58 pvec
->percpu_pvec_drained
= false;
61 static inline void pagevec_reinit(struct pagevec
*pvec
)
66 static inline unsigned pagevec_count(struct pagevec
*pvec
)
71 static inline unsigned pagevec_space(struct pagevec
*pvec
)
73 return PAGEVEC_SIZE
- pvec
->nr
;
77 * Add a page to a pagevec. Returns the number of slots still available.
79 static inline unsigned pagevec_add(struct pagevec
*pvec
, struct page
*page
)
81 pvec
->pages
[pvec
->nr
++] = page
;
82 return pagevec_space(pvec
);
85 static inline void pagevec_release(struct pagevec
*pvec
)
87 if (pagevec_count(pvec
))
88 __pagevec_release(pvec
);
91 #endif /* _LINUX_PAGEVEC_H */