From 7cbd8a839118eede2393f0926b8e15027162bcd6 Mon Sep 17 00:00:00 2001
From: yanhai zhu <zhu.yanhai@gmail.com>
Date: Wed, 12 Nov 2008 14:38:54 -0500
Subject: [PATCH] Btrfs: Add a missing return pointer check

Add a missing kzalloc() return pointer check in add_missing_dev().

Signed-off-by: Chris Mason <chris.mason@oracle.com>
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