From 32adf0901371c8b9d258dba7811f3067d1d2ea5c Mon Sep 17 00:00:00 2001
From: Liu Bo <bo.li.liu@oracle.com>
Date: Fri, 19 Oct 2012 12:52:15 +0000
Subject: [PATCH] Btrfs: cleanup unused arguments

'disk_key' is not used at all.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
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Reading git-format-patch failed