libnvdimm, region: hide persistence_domain when unknown

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Similar to other region attributes, do not emit the persistence_domain
attribute if its contents are empty.

Fixes: 96c3a23905 ("libnvdimm: expose platform persistence attr...")
Cc: Dave Jiang <dave.jiang@intel.com>
Reviewed-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

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Dan Williams 2018-03-21 14:06:23 -07:00

parent dc9e0a9347

commit 896196dc4e

1 changed files with 7 additions and 0 deletions

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7

drivers/nvdimm/region_devs.c

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