diff options
Diffstat (limited to 'mm/filemap.c')
| -rw-r--r-- | mm/filemap.c | 60 |
1 files changed, 0 insertions, 60 deletions
diff --git a/mm/filemap.c b/mm/filemap.c index 85adbcf2d9a7..31bf18ec6d01 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -2337,66 +2337,6 @@ out: } EXPORT_SYMBOL(filemap_get_folios_tag); -/** - * find_get_pages_range_tag - Find and return head pages matching @tag. - * @mapping: the address_space to search - * @index: the starting page index - * @end: The final page index (inclusive) - * @tag: the tag index - * @nr_pages: the maximum number of pages - * @pages: where the resulting pages are placed - * - * Like find_get_pages_range(), except we only return head pages which are - * tagged with @tag. @index is updated to the index immediately after the - * last page we return, ready for the next iteration. - * - * Return: the number of pages which were found. - */ -unsigned find_get_pages_range_tag(struct address_space *mapping, pgoff_t *index, - pgoff_t end, xa_mark_t tag, unsigned int nr_pages, - struct page **pages) -{ - XA_STATE(xas, &mapping->i_pages, *index); - struct folio *folio; - unsigned ret = 0; - - if (unlikely(!nr_pages)) - return 0; - - rcu_read_lock(); - while ((folio = find_get_entry(&xas, end, tag))) { - /* - * Shadow entries should never be tagged, but this iteration - * is lockless so there is a window for page reclaim to evict - * a page we saw tagged. Skip over it. - */ - if (xa_is_value(folio)) - continue; - - pages[ret] = &folio->page; - if (++ret == nr_pages) { - *index = folio->index + folio_nr_pages(folio); - goto out; - } - } - - /* - * We come here when we got to @end. We take care to not overflow the - * index @index as it confuses some of the callers. This breaks the - * iteration when there is a page at index -1 but that is already - * broken anyway. - */ - if (end == (pgoff_t)-1) - *index = (pgoff_t)-1; - else - *index = end + 1; -out: - rcu_read_unlock(); - - return ret; -} -EXPORT_SYMBOL(find_get_pages_range_tag); - /* * CD/DVDs are error prone. When a medium error occurs, the driver may fail * a _large_ part of the i/o request. Imagine the worst scenario: |