diff options
Diffstat (limited to 'mm/swap.c')
| -rw-r--r-- | mm/swap.c | 24 |
1 files changed, 15 insertions, 9 deletions
diff --git a/mm/swap.c b/mm/swap.c index 60b1d2a75852..62d96b8e5eb3 100644 --- a/mm/swap.c +++ b/mm/swap.c @@ -946,28 +946,34 @@ void pagevec_remove_exceptionals(struct pagevec *pvec) } /** - * pagevec_lookup - gang pagecache lookup + * pagevec_lookup_range - gang pagecache lookup * @pvec: Where the resulting pages are placed * @mapping: The address_space to search * @start: The starting page index + * @end: The final page index * @nr_pages: The maximum number of pages * - * pagevec_lookup() will search for and return a group of up to @nr_pages pages - * in the mapping. The pages are placed in @pvec. pagevec_lookup() takes a + * pagevec_lookup_range() will search for and return a group of up to @nr_pages + * pages in the mapping starting from index @start and upto index @end + * (inclusive). The pages are placed in @pvec. pagevec_lookup() takes a * reference against the pages in @pvec. * * The search returns a group of mapping-contiguous pages with ascending - * indexes. There may be holes in the indices due to not-present pages. + * indexes. There may be holes in the indices due to not-present pages. We + * also update @start to index the next page for the traversal. * - * pagevec_lookup() returns the number of pages which were found. + * pagevec_lookup_range() returns the number of pages which were found. If this + * number is smaller than @nr_pages, the end of specified range has been + * reached. */ -unsigned pagevec_lookup(struct pagevec *pvec, struct address_space *mapping, - pgoff_t start, unsigned nr_pages) +unsigned pagevec_lookup_range(struct pagevec *pvec, + struct address_space *mapping, pgoff_t *start, pgoff_t end) { - pvec->nr = find_get_pages(mapping, start, nr_pages, pvec->pages); + pvec->nr = find_get_pages_range(mapping, start, end, PAGEVEC_SIZE, + pvec->pages); return pagevec_count(pvec); } -EXPORT_SYMBOL(pagevec_lookup); +EXPORT_SYMBOL(pagevec_lookup_range); unsigned pagevec_lookup_tag(struct pagevec *pvec, struct address_space *mapping, pgoff_t *index, int tag, unsigned nr_pages) |