bool pmem_should_map_pages(struct device *dev)
{
struct nd_region *nd_region = to_nd_region(dev->parent);
+ struct nd_namespace_io *nsio;
if (!IS_ENABLED(CONFIG_ZONE_DEVICE))
return false;
if (is_nd_pfn(dev) || is_nd_btt(dev))
return false;
+ nsio = to_nd_namespace_io(dev);
+ if (region_intersects(nsio->res.start, resource_size(&nsio->res),
+ IORESOURCE_SYSTEM_RAM,
+ IORES_DESC_NONE) == REGION_MIXED)
+ return false;
+
#ifdef ARCH_MEMREMAP_PMEM
return ARCH_MEMREMAP_PMEM == MEMREMAP_WB;
#else