v4.19.13 snapshot.
diff --git a/drivers/dax/Kconfig b/drivers/dax/Kconfig
new file mode 100644
index 0000000..e0700bf
--- /dev/null
+++ b/drivers/dax/Kconfig
@@ -0,0 +1,34 @@
+config DAX_DRIVER
+ select DAX
+ bool
+
+menuconfig DAX
+ tristate "DAX: direct access to differentiated memory"
+ select SRCU
+ default m if NVDIMM_DAX
+
+if DAX
+
+config DEV_DAX
+ tristate "Device DAX: direct access mapping device"
+ depends on TRANSPARENT_HUGEPAGE
+ help
+ Support raw access to differentiated (persistence, bandwidth,
+ latency...) memory via an mmap(2) capable character
+ device. Platform firmware or a device driver may identify a
+ platform memory resource that is differentiated from the
+ baseline memory pool. Mappings of a /dev/daxX.Y device impose
+ restrictions that make the mapping behavior deterministic.
+
+config DEV_DAX_PMEM
+ tristate "PMEM DAX: direct access to persistent memory"
+ depends on LIBNVDIMM && NVDIMM_DAX && DEV_DAX
+ default DEV_DAX
+ help
+ Support raw access to persistent memory. Note that this
+ driver consumes memory ranges allocated and exported by the
+ libnvdimm sub-system.
+
+ Say Y if unsure
+
+endif