From 02ecd2c278471a3a7fd255662df92861c6759ebf Mon Sep 17 00:00:00 2001
From: Josef Bacik <jbacik@fusionio.com>
Date: Fri, 25 Oct 2013 16:19:08 -0400
Subject: [PATCH] Btrfs: do not bug_on if we try to cow a free space cache
 inode

We can just return an error and we'll bail out properly.  We still want to catch
this case to make sure we don't have a bug somewhere, so just warn if this pops
up.  Thanks,

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