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-rw-r--r--drivers/nvdimm/pmem.c4
-rw-r--r--drivers/nvdimm/region_devs.c13
2 files changed, 16 insertions, 1 deletions
diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c
index cf074b1..10041ac 100644
--- a/drivers/nvdimm/pmem.c
+++ b/drivers/nvdimm/pmem.c
@@ -35,6 +35,7 @@
#include "pmem.h"
#include "pfn.h"
#include "nd.h"
+#include "nd-core.h"
static struct device *to_dev(struct pmem_device *pmem)
{
@@ -334,7 +335,8 @@ static int pmem_attach_disk(struct device *dev,
dev_warn(dev, "unable to guarantee persistence of writes\n");
fua = 0;
}
- wbc = nvdimm_has_cache(nd_region);
+ wbc = nvdimm_has_cache(nd_region) &&
+ !test_bit(ND_REGION_PERSIST_CACHE, &nd_region->flags);
if (!devm_request_mem_region(dev, res->start, resource_size(res),
dev_name(&ndns->dev))) {
diff --git a/drivers/nvdimm/region_devs.c b/drivers/nvdimm/region_devs.c
index abaf38c..e6d0191 100644
--- a/drivers/nvdimm/region_devs.c
+++ b/drivers/nvdimm/region_devs.c
@@ -528,6 +528,18 @@ static ssize_t resource_show(struct device *dev,
}
static DEVICE_ATTR_RO(resource);
+static ssize_t persistence_domain_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct nd_region *nd_region = to_nd_region(dev);
+ unsigned long flags = nd_region->flags;
+
+ return sprintf(buf, "%s%s\n",
+ flags & BIT(ND_REGION_PERSIST_CACHE) ? "cpu_cache " : "",
+ flags & BIT(ND_REGION_PERSIST_MEMCTRL) ? "memory_controller " : "");
+}
+static DEVICE_ATTR_RO(persistence_domain);
+
static struct attribute *nd_region_attributes[] = {
&dev_attr_size.attr,
&dev_attr_nstype.attr,
@@ -543,6 +555,7 @@ static struct attribute *nd_region_attributes[] = {
&dev_attr_init_namespaces.attr,
&dev_attr_badblocks.attr,
&dev_attr_resource.attr,
+ &dev_attr_persistence_domain.attr,
NULL,
};
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