Btrfs: only clear dirty on the buffer if it is marked as dirty

No reason to set the path blocking or loop through all of the pages if the
extent buffer isn't actually marked dirty.  Thanks,

Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index b8f7f04a64078b1358075b7424dbae12fb3ffcfc..65f03670a9528873e575545b18cbbd6a7ae12ebb 100644 (file)
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -1142,11 +1142,11 @@ void clean_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root,
                                          root->fs_info->dirty_metadata_bytes);
                        }
                        spin_unlock(&root->fs_info->delalloc_lock);
-               }
 
-               /* ugh, clear_extent_buffer_dirty needs to lock the page */
-               btrfs_set_lock_blocking(buf);
-               clear_extent_buffer_dirty(buf);
+                       /* ugh, clear_extent_buffer_dirty needs to lock the page */
+                       btrfs_set_lock_blocking(buf);
+                       clear_extent_buffer_dirty(buf);
+               }
        }
 }