unsigned find_get_pages (struct address_space * mapping, pgoff_t start, unsigned int nr_pages, struct page ** pages);
find_get_pages will search for and return a group of up to nr_pages pages in the mapping. The pages are placed at pages. find_get_pages takes a reference against the returned pages.
The search returns a group of mapping-contiguous pages with ascending indexes. There may be holes in the indices due to not-present pages.
find_get_pages returns the number of pages which were found.