Btrfs: unplug in the async bio submission threads

[pandora-kernel.git] / fs / btrfs / extent_io.h

diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h
index 1f9df88..5bc20ab 100644 (file)
--- a/fs/btrfs/extent_io.h
+++ b/fs/btrfs/extent_io.h
@@ -25,6 +25,7 @@
 /* these are bit numbers for test/set bit */
 #define EXTENT_BUFFER_UPTODATE 0
 #define EXTENT_BUFFER_BLOCKING 1
+#define EXTENT_BUFFER_DIRTY 2
 
 /*
  * page->private values.  Every page that is controlled by the extent
@@ -254,6 +255,8 @@ int clear_extent_buffer_dirty(struct extent_io_tree *tree,
                              struct extent_buffer *eb);
 int set_extent_buffer_dirty(struct extent_io_tree *tree,
                             struct extent_buffer *eb);
+int test_extent_buffer_dirty(struct extent_io_tree *tree,
+                            struct extent_buffer *eb);
 int set_extent_buffer_uptodate(struct extent_io_tree *tree,
                               struct extent_buffer *eb);
 int clear_extent_buffer_uptodate(struct extent_io_tree *tree,