From: Yan, Zheng <zheng.yan@oracle.com>
Date: Wed, 26 May 2010 15:20:30 +0000 (-0400)
Subject: Btrfs: Fix block generation verification race
X-Git-Tag: v2.6.35-rc1~36^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5bdd3536cbbe2ecd94ecc14410c6b1b31da16381;p=pandora-kernel.git

Btrfs: Fix block generation verification race

After the path is released, the generation number got from block
pointer is no long valid. The race may cause disk corruption, because
verify_parent_transid() calls clear_extent_buffer_uptodate() when
generation numbers mismatch.

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