Yan, Zheng f044ba7835 Btrfs: fix race between allocate and release extent buffer.
Increase extent buffer's reference count while holding the lock.
Otherwise it can race with try_release_extent_buffer.

Signed-off-by: Yan Zheng <zheng.yan@oracle.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2010-02-04 11:31:44 -05:00
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