diff options
Diffstat (limited to 'include/linux/pagevec.h')
| -rw-r--r-- | include/linux/pagevec.h | 67 |
1 files changed, 63 insertions, 4 deletions
diff --git a/include/linux/pagevec.h b/include/linux/pagevec.h index b45d391b4540..e60d74148d0b 100644 --- a/include/linux/pagevec.h +++ b/include/linux/pagevec.h @@ -22,10 +22,6 @@ struct pagevec { void __pagevec_release(struct pagevec *pvec); void __pagevec_lru_add(struct pagevec *pvec); -unsigned pagevec_lookup_entries(struct pagevec *pvec, - struct address_space *mapping, - pgoff_t start, unsigned nr_entries, - pgoff_t *indices); void pagevec_remove_exceptionals(struct pagevec *pvec); unsigned pagevec_lookup(struct pagevec *pvec, struct address_space *mapping, pgoff_t start, unsigned nr_pages); @@ -69,4 +65,67 @@ static inline void pagevec_release(struct pagevec *pvec) __pagevec_release(pvec); } +struct pagecache_iter { + unsigned nr; + unsigned idx; + pgoff_t index; + struct page *pages[PAGEVEC_SIZE]; + pgoff_t indices[PAGEVEC_SIZE]; +}; + +static inline void pagecache_iter_init(struct pagecache_iter *iter, + pgoff_t start) +{ + iter->nr = 0; + iter->idx = 0; + iter->index = start; +} + +void __pagecache_iter_release(struct pagecache_iter *iter); + +/** + * pagecache_iter_release - release cached pages from pagacache_iter + * + * Must be called if breaking out of for_each_pagecache_page() etc. early - not + * needed if pagecache_iter_next() returned NULL and loop terminated normally + */ +static inline void pagecache_iter_release(struct pagecache_iter *iter) +{ + if (iter->nr) + __pagecache_iter_release(iter); +} + +struct page *pagecache_iter_next(struct pagecache_iter *iter, + struct address_space *mapping, + pgoff_t end, pgoff_t *index, + unsigned flags); + +#define __pagecache_iter_for_each(_iter, _mapping, _start, _end, \ + _page, _index, _flags) \ + for (pagecache_iter_init((_iter), (_start)); \ + ((_page) = pagecache_iter_next((_iter), (_mapping), \ + (_end), (_index), (_flags)));) + +#define for_each_pagecache_page(_iter, _mapping, _start, _end, _page) \ + __pagecache_iter_for_each((_iter), (_mapping), (_start), (_end),\ + (_page), NULL, 0) + +#define for_each_pagecache_page_contig(_iter, _mapping, _start, _end, _page)\ + __pagecache_iter_for_each((_iter), (_mapping), (_start), (_end),\ + (_page), NULL, RADIX_TREE_ITER_CONTIG) + +#define for_each_pagecache_tag(_iter, _mapping, _tag, _start, _end, _page)\ + __pagecache_iter_for_each((_iter), (_mapping), (_start), (_end),\ + (_page), NULL, RADIX_TREE_ITER_TAGGED|(_tag)) + +#define for_each_pagecache_entry(_iter, _mapping, _start, _end, _page, _index)\ + __pagecache_iter_for_each((_iter), (_mapping), (_start), (_end),\ + (_page), &(_index), RADIX_TREE_ITER_EXCEPTIONAL) + +#define for_each_pagecache_entry_tag(_iter, _mapping, _tag, \ + _start, _end, _page, _index) \ + __pagecache_iter_for_each((_iter), (_mapping), (_start), (_end),\ + (_page), &(_index), RADIX_TREE_ITER_EXCEPTIONAL|\ + RADIX_TREE_ITER_TAGGED|(_tag)) + #endif /* _LINUX_PAGEVEC_H */ |