From 3f8a18cc53bd1be26eb5b5247e1386ad0e21b623 Mon Sep 17 00:00:00 2001
From: Josef Bacik <jbacik@fb.com>
Date: Fri, 28 Mar 2014 17:16:01 -0400
Subject: [PATCH] Btrfs: hold the commit_root_sem when getting the commit root
 during send

We currently rely too heavily on roots being read-only to save us from just
accessing root->commit_root.  We can easily balance blocks out from underneath a
read only root, so to save us from getting screwed make sure we only access
root->commit_root under the commit root sem.  Thanks,

Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Chris Mason <clm@fb.com>
---
Reading git-format-patch failed