[PATCH v2 4/6] libnvdimm/namespace: Add debug check while initializing namespace resource size.

["Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>]

This should enable us to catch if we are initializing the namespace with a wrong
size.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
---
 drivers/nvdimm/namespace_devs.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/nvdimm/namespace_devs.c b/drivers/nvdimm/namespace_devs.c
index 0e4c04765cb8..06b55c41660d 100644
--- a/drivers/nvdimm/namespace_devs.c
+++ b/drivers/nvdimm/namespace_devs.c
@@ -967,6 +967,18 @@ static void nd_namespace_pmem_set_resource(struct nd_region *nd_region,
  out:
 	res->start = nd_region->ndr_start + offset;
 	res->end = res->start + size - 1;
+#ifdef CONFIG_DEBUG_VM
+	if (size) {
+		unsigned long map_size;
+
+		map_size = nvdimm_validate_namespace_size(nd_region, size, arch_namespace_align_size());
+		WARN_ON(map_size);
+
+		map_size = nvdimm_validate_namespace_size(nd_region, res->start, arch_namespace_align_size());
+		WARN_ON(map_size);
+
+	}
+#endif
 }
 
 static bool uuid_not_set(const u8 *uuid, struct device *dev, const char *where)
-- 
2.23.0
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