read_cache_page_async — read into page cache, fill it if needed
struct page * read_cache_page_async ( | struct address_space * | mapping, |
| pgoff_t | index, | |
| int (* | filler(void *,struct page*), | |
| void * | data); |
mappingthe page's address_space
indexthe page index
fillerfunction to perform the read
datadestination for read data
Same as read_cache_page, but don't wait for page to become unlocked after submitting it to the filler.
Read into the page cache. If a page already exists, and PageUptodate is
not set, try to fill the page but don't wait for it to become unlocked.
If the page does not get brought uptodate, return -EIO.