Btrfs: Add readpages support

Signed-off-by: Chris Mason <chris.mason@oracle.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/fs/btrfs/extent_map.h b/fs/btrfs/extent_map.h
index 0b0dcf19fe45..fbd23a72f53b 100644
--- a/fs/btrfs/extent_map.h
+++ b/fs/btrfs/extent_map.h
@@ -140,6 +140,10 @@ int extent_writepages(struct extent_map_tree *tree,
                       struct address_space *mapping,
                       get_extent_t *get_extent,
                       struct writeback_control *wbc);
+int extent_readpages(struct extent_map_tree *tree,
+                     struct address_space *mapping,
+                     struct list_head *pages, unsigned nr_pages,
+                     get_extent_t get_extent);
 int extent_prepare_write(struct extent_map_tree *tree,
                          struct inode *inode, struct page *page,
                          unsigned from, unsigned to, get_extent_t *get_extent);