[PATCH 11/16] libnvdimm: Simplify root read-only definition for the 'resource' attribute

Dan Williams
2019-11-07T04:11:54Z

Rather than update the permission in ->is_visible() set the permission
directly at declaration time.

Cc: Ira Weiny <ira.weiny@intel.com>
Cc: Vishal Verma <vishal.l.verma@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
---
drivers/nvdimm/namespace_devs.c | 9 +++------
drivers/nvdimm/pfn_devs.c | 10 +---------
drivers/nvdimm/region_devs.c | 10 +++-------
3 files changed, 7 insertions(+), 22 deletions(-)

diff --git a/drivers/nvdimm/namespace_devs.c b/drivers/nvdimm/namespace_devs.c
index 37471a272c1a..85b553094d19 100644
--- a/drivers/nvdimm/namespace_devs.c
+++ b/drivers/nvdimm/namespace_devs.c
@@ -1303,7 +1303,7 @@ static ssize_t resource_show(struct device *dev,
return -ENXIO;
return sprintf(buf, "%#llx\n", (unsigned long long) res->start);
}
-static DEVICE_ATTR_RO(resource);
+static DEVICE_ATTR(resource, 0400, resource_show, NULL);

static const unsigned long blk_lbasize_supported[] = { 512, 520, 528,
4096, 4104, 4160, 4224, 0 };
@@ -1619,11 +1619,8 @@ static umode_t namespace_visible(struct kobject *kobj,
{
struct device *dev = container_of(kobj, struct device, kobj);

- if (a == &dev_attr_resource.attr) {
- if (is_namespace_blk(dev))
- return 0;
- return 0400;
- }
+ if (a == &dev_attr_resource.attr && is_namespace_blk(dev))
+ return 0;

if (is_namespace_pmem(dev) || is_namespace_blk(dev)) {
if (a == &dev_attr_size.attr)
diff --git a/drivers/nvdimm/pfn_devs.c b/drivers/nvdimm/pfn_devs.c
index e809961e2b6f..9f9cb51301e7 100644
--- a/drivers/nvdimm/pfn_devs.c
+++ b/drivers/nvdimm/pfn_devs.c
@@ -218,7 +218,7 @@ static ssize_t resource_show(struct device *dev,

return rc;
}
-static DEVICE_ATTR_RO(resource);
+static DEVICE_ATTR(resource, 0400, resource_show, NULL);

static ssize_t size_show(struct device *dev,
struct device_attribute *attr, char *buf)
@@ -269,16 +269,8 @@ static struct attribute *nd_pfn_attributes[] = {
NULL,
};

-static umode_t pfn_visible(struct kobject *kobj, struct attribute *a, int n)
-{
- if (a == &dev_attr_resource.attr)
- return 0400;
- return a->mode;
-}
-
static struct attribute_group nd_pfn_attribute_group = {
.attrs = nd_pfn_attributes,
- .is_visible = pfn_visible,
};

const struct attribute_group *nd_pfn_attribute_groups[] = {
diff --git a/drivers/nvdimm/region_devs.c b/drivers/nvdimm/region_devs.c
index 0afc1973e938..be3e429e86af 100644
--- a/drivers/nvdimm/region_devs.c
+++ b/drivers/nvdimm/region_devs.c
@@ -553,7 +553,7 @@ static ssize_t resource_show(struct device *dev,

return sprintf(buf, "%#llx\n", nd_region->ndr_start);
}
-static DEVICE_ATTR_RO(resource);
+static DEVICE_ATTR(resource, 0400, resource_show, NULL);

static ssize_t persistence_domain_show(struct device *dev,
struct device_attribute *attr, char *buf)
@@ -605,12 +605,8 @@ static umode_t region_visible(struct kobject *kobj, struct attribute *a, int n)
if (!is_memory(dev) && a == &dev_attr_badblocks.attr)
return 0;

- if (a == &dev_attr_resource.attr) {
- if (is_memory(dev))
- return 0400;
- else
- return 0;
- }
+ if (a == &dev_attr_resource.attr && !is_memory(dev))
+ return 0;

if (a == &dev_attr_deep_flush.attr) {
int has_flush = nvdimm_has_flush(nd_region);