Merge tag 'libnvdimm-for-6.7' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm

Pull libnvdimm updates from Ira Weiny:

 - updates to deprecated and changed interfaces

 - bug/kdoc fixes

* tag 'libnvdimm-for-6.7' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
  libnvdimm: remove kernel-doc warnings:
  testing: nvdimm: make struct class structures constant
  libnvdimm: Annotate struct nd_region with __counted_by
  nd_btt: Make BTT lanes preemptible
  libnvdimm/of_pmem: Use devm_kstrdup instead of kstrdup and check its return value
  dax: refactor deprecated strncpy

5 files changed, 16 insertions, 10 deletions

diff --git a/drivers/dax/bus.c b/drivers/dax/bus.c
index 0ee96e6fc426..1659b787b65f 100644
--- a/drivers/dax/bus.c
+++ b/drivers/dax/bus.c
@@ -103,7 +103,7 @@ static ssize_t do_id_store(struct device_driver *drv, const char *buf,
 		if (action == ID_ADD) {
 			dax_id = kzalloc(sizeof(*dax_id), GFP_KERNEL);
 			if (dax_id) {
-				strncpy(dax_id->dev_name, buf, DAX_NAME_LEN);
+				strscpy(dax_id->dev_name, buf, DAX_NAME_LEN);
 				list_add(&dax_id->list, &dax_drv->ids);
 			} else
 				rc = -ENOMEM;
diff --git a/drivers/nvdimm/badrange.c b/drivers/nvdimm/badrange.c
index aaf6e215a8c6..a002ea6fdd84 100644
--- a/drivers/nvdimm/badrange.c
+++ b/drivers/nvdimm/badrange.c
@@ -257,9 +257,9 @@ static void badblocks_populate(struct badrange *badrange,
 
 /**
  * nvdimm_badblocks_populate() - Convert a list of badranges to badblocks
- * @region: parent region of the range to interrogate
+ * @nd_region: parent region of the range to interrogate
  * @bb: badblocks instance to populate
- * @res: resource range to consider
+ * @range: resource range to consider
  *
  * The badrange list generated during bus initialization may contain
  * multiple, possibly overlapping physical address ranges.  Compare each
diff --git a/drivers/nvdimm/nd.h b/drivers/nvdimm/nd.h
index e8b9d27dbb3c..ae2078eb6a62 100644
--- a/drivers/nvdimm/nd.h
+++ b/drivers/nvdimm/nd.h
@@ -422,7 +422,7 @@ struct nd_region {
 	struct nd_interleave_set *nd_set;
 	struct nd_percpu_lane __percpu *lane;
 	int (*flush)(struct nd_region *nd_region, struct bio *bio);
-	struct nd_mapping mapping[];
+	struct nd_mapping mapping[] __counted_by(ndr_mappings);
 };
 
 static inline bool nsl_validate_nlabel(struct nd_region *nd_region,
diff --git a/drivers/nvdimm/of_pmem.c b/drivers/nvdimm/of_pmem.c
index 1b9f5b8a6167..d3fca0ab6290 100644
--- a/drivers/nvdimm/of_pmem.c
+++ b/drivers/nvdimm/of_pmem.c
@@ -30,7 +30,13 @@ static int of_pmem_region_probe(struct platform_device *pdev)
 	if (!priv)
 		return -ENOMEM;
 
-	priv->bus_desc.provider_name = kstrdup(pdev->name, GFP_KERNEL);
+	priv->bus_desc.provider_name = devm_kstrdup(&pdev->dev, pdev->name,
+							GFP_KERNEL);
+	if (!priv->bus_desc.provider_name) {
+		kfree(priv);
+		return -ENOMEM;
+	}
+
 	priv->bus_desc.module = THIS_MODULE;
 	priv->bus_desc.of_node = np;
 
diff --git a/drivers/nvdimm/region_devs.c b/drivers/nvdimm/region_devs.c
index 0a81f87f6f6c..9e4f7ff024a0 100644
--- a/drivers/nvdimm/region_devs.c
+++ b/drivers/nvdimm/region_devs.c
@@ -939,7 +939,8 @@ unsigned int nd_region_acquire_lane(struct nd_region *nd_region)
 {
 	unsigned int cpu, lane;
 
-	cpu = get_cpu();
+	migrate_disable();
+	cpu = smp_processor_id();
 	if (nd_region->num_lanes < nr_cpu_ids) {
 		struct nd_percpu_lane *ndl_lock, *ndl_count;
 
@@ -958,16 +959,15 @@ EXPORT_SYMBOL(nd_region_acquire_lane);
 void nd_region_release_lane(struct nd_region *nd_region, unsigned int lane)
 {
 	if (nd_region->num_lanes < nr_cpu_ids) {
-		unsigned int cpu = get_cpu();
+		unsigned int cpu = smp_processor_id();
 		struct nd_percpu_lane *ndl_lock, *ndl_count;
 
 		ndl_count = per_cpu_ptr(nd_region->lane, cpu);
 		ndl_lock = per_cpu_ptr(nd_region->lane, lane);
 		if (--ndl_count->count == 0)
 			spin_unlock(&ndl_lock->lock);
-		put_cpu();
 	}
-	put_cpu();
+	migrate_enable();
 }
 EXPORT_SYMBOL(nd_region_release_lane);
 
@@ -1028,6 +1028,7 @@ static struct nd_region *nd_region_create(struct nvdimm_bus *nvdimm_bus,
 
 	if (!nd_region)
 		return NULL;
+	nd_region->ndr_mappings = ndr_desc->num_mappings;
 	/* CXL pre-assigns memregion ids before creating nvdimm regions */
 	if (test_bit(ND_REGION_CXL, &ndr_desc->flags)) {
 		nd_region->id = ndr_desc->memregion;
@@ -1062,7 +1063,6 @@ static struct nd_region *nd_region_create(struct nvdimm_bus *nvdimm_bus,
 
 		get_device(&nvdimm->dev);
 	}
-	nd_region->ndr_mappings = ndr_desc->num_mappings;
 	nd_region->provider_data = ndr_desc->provider_data;
 	nd_region->nd_set = ndr_desc->nd_set;
 	nd_region->num_lanes = ndr_desc->num_lanes;