[lvm-devel] [RFC LVM2] (2/6) Add pv_dev_name() to access PV device name

[Jun'ichi Nomura]

In the patch "(6/6) Allow allocation from LV",
PV may be attached to LV.
In that case, the LV's name should be used as the PV's device name.

This patch adds pv_dev_name(), which decides whether dev_name(pv->dev)
or LV name should be used, and convert others to use it.

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