diff options
Diffstat (limited to 'mm/filemap.c')
| -rw-r--r-- | mm/filemap.c | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/mm/filemap.c b/mm/filemap.c index df343d1e6345..07e9d9258b48 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -343,7 +343,7 @@ int sync_page_range(struct inode *inode, struct address_space *mapping, EXPORT_SYMBOL(sync_page_range); /** - * sync_page_range_nolock + * sync_page_range_nolock - write & wait on all pages in the passed range without locking * @inode: target inode * @mapping: target address_space * @pos: beginning offset in pages to write @@ -611,7 +611,10 @@ int __lock_page_killable(struct page *page) sync_page_killable, TASK_KILLABLE); } -/* +/** + * __lock_page_nosync - get a lock on the page, without calling sync_page() + * @page: the page to lock + * * Variant of lock_page that does not require the caller to hold a reference * on the page's mapping. */ @@ -1538,9 +1541,20 @@ repeat: return page; } -/* +/** + * read_cache_page_async - read into page cache, fill it if needed + * @mapping: the page's address_space + * @index: the page index + * @filler: function to perform the read + * @data: destination 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. */ struct page *read_cache_page_async(struct address_space *mapping, pgoff_t index, |