dm ioctl: make __dev_status void
__dev_status() cannot fail so make it void and simplify callers.
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
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__dev_status() cannot fail so make it void and simplify callers.
Signed-off-by: Alasdair G Kergon <agk@redhat.com>