From 1cf4ffdb3289624a6462c94f2ce05545b32ef736 Mon Sep 17 00:00:00 2001
From: Liu Bo <liubo2009@cn.fujitsu.com>
Date: Wed, 7 Dec 2011 20:08:40 -0500
Subject: [PATCH] Btrfs: drop spin lock when memory alloc fails

Drop spin lock in convert_extent_bit() when memory alloc fails,
otherwise, it will be a deadlock.

Signed-off-by: Liu Bo <liubo2009@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
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Reading git-format-patch failed