From: Yan, Zheng <zheng.yan@oracle.com>
Date: Thu, 26 Nov 2009 09:31:11 +0000 (+0000)
Subject: Btrfs: don't add extent 0 to the free space cache v2
X-Git-Tag: v2.6.33-rc1~7^2~1^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=06b2331f8333ec6edf41662757ce8882cc1747d5;p=pandora-kernel.git

Btrfs: don't add extent 0 to the free space cache v2

If block group 0 is completely free, btrfs_read_block_groups will
add extent [0, BTRFS_SUPER_INFO_OFFSET) to the free space cache.

Signed-off-by: Yan Zheng <zheng.yan@oracle.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
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