Merge tag 'for-linus-5.3a-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git...

[linux.git] / drivers / dax / bus.c

diff --git a/drivers/dax/bus.c b/drivers/dax/bus.c
index 5f184e751c826dfe312c4e59f67fd823c8e08558..8fafbeab510a803b46b4ac9306bf3132dbec6584 100644 (file)
--- a/drivers/dax/bus.c
+++ b/drivers/dax/bus.c
@@ -295,6 +295,22 @@ static ssize_t target_node_show(struct device *dev,
 }
 static DEVICE_ATTR_RO(target_node);
 
+static unsigned long long dev_dax_resource(struct dev_dax *dev_dax)
+{
+       struct dax_region *dax_region = dev_dax->region;
+
+       return dax_region->res.start;
+}
+
+static ssize_t resource_show(struct device *dev,
+               struct device_attribute *attr, char *buf)
+{
+       struct dev_dax *dev_dax = to_dev_dax(dev);
+
+       return sprintf(buf, "%#llx\n", dev_dax_resource(dev_dax));
+}
+static DEVICE_ATTR_RO(resource);
+
 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr,
                char *buf)
 {
@@ -313,6 +329,8 @@ static umode_t dev_dax_visible(struct kobject *kobj, struct attribute *a, int n)
 
        if (a == &dev_attr_target_node.attr && dev_dax_target_node(dev_dax) < 0)
                return 0;
+       if (a == &dev_attr_resource.attr)
+               return 0400;
        return a->mode;
 }
 
@@ -320,6 +338,7 @@ static struct attribute *dev_dax_attributes[] = {
        &dev_attr_modalias.attr,
        &dev_attr_size.attr,
        &dev_attr_target_node.attr,
+       &dev_attr_resource.attr,
        NULL,
 };