From 91ca338d776e0cefb255bf2979b6448febd880f5 Mon Sep 17 00:00:00 2001
From: Tsutomu Itoh <t-itoh@jp.fujitsu.com>
Date: Wed, 5 Jan 2011 02:32:22 +0000
Subject: btrfs: check NULL or not

Should check if functions returns NULL or not.

Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
---
 fs/btrfs/extent_io.c | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'fs/btrfs/extent_io.c')

diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index f1d198128959..8b8d3d99ae68 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -3075,6 +3075,8 @@ static struct extent_buffer *__alloc_extent_buffer(struct extent_io_tree *tree,
 #endif
 
 	eb = kmem_cache_zalloc(extent_buffer_cache, mask);
+	if (eb == NULL)
+		return NULL;
 	eb->start = start;
 	eb->len = len;
 	spin_lock_init(&eb->lock);
-- 
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