From d638108484d186bf97a838d037f165d9b404e6ee Mon Sep 17 00:00:00 2001
From: Jan Schmidt <list.btrfs@jan-o-sch.net>
Date: Tue, 23 Oct 2012 14:21:05 +0200
Subject: [PATCH] Btrfs: fix extent buffer reference for tree mod log roots

In get_old_root we grab a lock on the extent buffer before we obtain a
reference on that buffer. That order is changed now.

Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
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Reading git-format-patch failed