Name
read_cache_page —
read into page cache, fill it if needed
Synopsis
struct page * read_cache_page ( | struct address_space * mapping, |
| | pgoff_t index, |
| | int (*filler)
(void *, struct page *), |
| | void * data); |
Arguments
struct address_space * mapping
the page's address_space
pgoff_t index
the page index
int (*)(void *, struct page *) filler
function to perform the read
void * data
first arg to filler(data, page) function, often left as NULL
Description
Read into the page cache. If a page already exists, and PageUptodate is
not set, try to fill the page and wait for it to become unlocked.
If the page does not get brought uptodate, return -EIO.