nvdimm_has_flush
fua = nvdimm_has_flush(nd_region);
EXPORT_SYMBOL_GPL(nvdimm_has_flush);
return sprintf(buf, "%d\n", nvdimm_has_flush(nd_region));
int has_flush = nvdimm_has_flush(nd_region);
int nvdimm_has_flush(struct nd_region *nd_region);