From: Yan <yanzheng@21cn.com>
Date: Fri, 14 Sep 2007 20:15:28 +0000 (-0400)
Subject: Btrfs: Fix cache_block_group to catch holes at the start of the group
X-Git-Tag: v2.6.29-rc1~27^2~9^2~55^2~56^2~30^2~482
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7d7d6068bee9d8004ea7cc8a2ebda2c99a57caec;p=pandora-kernel.git

Btrfs: Fix cache_block_group to catch holes at the start of the group

Cache block group was overly complex and missed free blocks at the very start
of the group.  This patch simplifies things significantly.

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