diff options
| author | Dan Williams <dan.j.williams@intel.com> | 2019-11-13 04:13:31 +0300 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2019-11-19 20:52:12 +0300 |
| commit | cb4dd729ee6ccc67ad604b1750990eb8c18783fa (patch) | |
| tree | afe0726ecd70122e58baa156626232a8e76e2242 /drivers/dax/bus.c | |
| parent | bfd2e9140656a061138ecdc6a5485d5e2a7a3333 (diff) | |
| download | linux-cb4dd729ee6ccc67ad604b1750990eb8c18783fa.tar.xz | |
dax: Add numa_node to the default device-dax attributes
It is confusing that device-dax instances publish a 'target_node'
attribute, but not a 'numa_node'. The 'numa_node' information is
available elsewhere in the sysfs device hierarchy, but it is not obvious
and not reliable from one device-dax instance-type (e.g. child devices
of nvdimm namespaces) to the next (e.g. 'hmem' devices defined by EFI
Specific Purpose Memory and the ACPI HMAT).
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>
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Link: https://lore.kernel.org/r/157309906102.1582359.4262088001244476001.stgit@dwillia2-desk3.amr.corp.intel.com
Diffstat (limited to 'drivers/dax/bus.c')
| -rw-r--r-- | drivers/dax/bus.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/dax/bus.c b/drivers/dax/bus.c index ce6d648d7670..0879b9663eb7 100644 --- a/drivers/dax/bus.c +++ b/drivers/dax/bus.c @@ -322,6 +322,13 @@ static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, } static DEVICE_ATTR_RO(modalias); +static ssize_t numa_node_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return sprintf(buf, "%d\n", dev_to_node(dev)); +} +static DEVICE_ATTR_RO(numa_node); + static umode_t dev_dax_visible(struct kobject *kobj, struct attribute *a, int n) { struct device *dev = container_of(kobj, struct device, kobj); @@ -329,6 +336,8 @@ 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_numa_node.attr && !IS_ENABLED(CONFIG_NUMA)) + return 0; return a->mode; } @@ -337,6 +346,7 @@ static struct attribute *dev_dax_attributes[] = { &dev_attr_size.attr, &dev_attr_target_node.attr, &dev_attr_resource.attr, + &dev_attr_numa_node.attr, NULL, }; |