[lvm-devel] [PATCH 2/2] Fix lv-seg relationship on layer removal

[Jun'ichi Nomura]

When a layer is removed, a linear-mapping segment of its parent
is discarded and segments of the layer are moved to the parent LV.

To discard the linear-mapping layer properly,
we need to call lv_empty() for the parent to release the layer.
Otherwise, the layer LV still has the discarded linear segment
in its segs_using_this_lv list.
(Though it might not have any visible effect because the layer
 is eventually removed.)

Thanks Milan Broz for finding this bug.

Thanks,
-- 
Jun'ichi Nomura, NEC Corporation of America
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