Merge git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable

* git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable:
  Btrfs: apply updated fallocate i_size fix
  Btrfs: do not try and lookup the file extent when finishing ordered io
  Btrfs: Fix oopsen when dropping empty tree.
  Btrfs: remove BUG_ON() due to mounting bad filesystem
  Btrfs: make error return negative in btrfs_sync_file()
  Btrfs: fix race between allocate and release extent buffer.

1 files changed, 1 insertions, 2 deletions

diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 96577e8bf9fd..b177ed319612 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -3165,10 +3165,9 @@ struct extent_buffer *alloc_extent_buffer(struct extent_io_tree *tree,
                 spin_unlock(&tree->buffer_lock);
                 goto free_eb;
         }
-        spin_unlock(&tree->buffer_lock);
-
         /* add one reference for the tree */
         atomic_inc(&eb->refs);
+        spin_unlock(&tree->buffer_lock);
         return eb;
 
 free_eb: