Merge branch 'for-5.7/libnvdimm' into libnvdimm-for-next
- Introduce 'zero_page_range' as a dax operation. This facilitates filesystem-dax operation without a block-device. - Advertise a persistence-domain for of_pmem and papr_scm. The persistence domain indicates where cpu-store cycles need to reach in the platform-memory subsystem before the platform will consider them power-fail protected. - Fixup some flexible-array declarations.
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