Merge tag 'libnvdimm-for-4.20' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm

Pull libnvdimm updates from Dan Williams:

 - Improve the efficiency and performance of reading nvdimm-namespace
   labels. Reduce the amount of label data read at driver load time by a
   few orders of magnitude. Reduce heavyweight call-outs to
   platform-firmware routines.

 - Handle media errors located in the 'struct page' array stored on a
   persistent memory namespace. Let the kernel clear these errors rather
   than an awkward userspace workaround.

 - Fix Address Range Scrub (ARS) completion tracking. Correct occasions
   where the kernel indicates completion of ARS before submission.

 - Fix asynchronous device registration reference counting.

 - Add support for reporting an nvdimm dirty-shutdown-count via sysfs.

 - Fix various small libnvdimm core and uapi issues.

* tag 'libnvdimm-for-4.20' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm: (21 commits)
  acpi, nfit: Further restrict userspace ARS start requests
  acpi, nfit: Fix Address Range Scrub completion tracking
  UAPI: ndctl: Remove use of PAGE_SIZE
  UAPI: ndctl: Fix g++-unsupported initialisation in headers
  tools/testing/nvdimm: Populate dirty shutdown data
  acpi, nfit: Collect shutdown status
  acpi, nfit: Introduce nfit_mem flags
  libnvdimm, label: Fix sparse warning
  nvdimm: Use namespace index data to reduce number of label reads needed
  nvdimm: Split label init out from the logic for getting config data
  nvdimm: Remove empty if statement
  nvdimm: Clarify comment in sizeof_namespace_index
  nvdimm: Sanity check labeloff
  libnvdimm, dimm: Maximize label transfer size
  libnvdimm, pmem: Fix badblocks population for 'raw' namespaces
  libnvdimm, namespace: Drop the repeat assignment for variable dev->parent
  libnvdimm, region: Fail badblocks listing for inactive regions
  libnvdimm, pfn: during init, clear errors in the metadata area
  libnvdimm: Set device node in nd_device_register
  libnvdimm: Hold reference on parent while scheduling async init
  ...

tools/testing/nvdimm/Kbuild

@@ -22,6 +22,7 @@ NVDIMM_SRC := $(DRIVERS)/nvdimm
 ACPI_SRC := $(DRIVERS)/acpi/nfit
 DAX_SRC := $(DRIVERS)/dax
 ccflags-y := -I$(src)/$(NVDIMM_SRC)/
+ccflags-y += -I$(src)/$(ACPI_SRC)/
 
 obj-$(CONFIG_LIBNVDIMM) += libnvdimm.o
 obj-$(CONFIG_BLK_DEV_PMEM) += nd_pmem.o

tools/testing/nvdimm/acpi_nfit_test.c

@@ -4,5 +4,13 @@
 #include <linux/module.h>
 #include <linux/printk.h>
 #include "watermark.h"
+#include <nfit.h>
 
 nfit_test_watermark(acpi_nfit);
+
+/* strong / override definition of nfit_intel_shutdown_status */
+void nfit_intel_shutdown_status(struct nfit_mem *nfit_mem)
+{
+	set_bit(NFIT_MEM_DIRTY_COUNT, &nfit_mem->flags);
+	nfit_mem->dirty_shutdown = 42;
+}

tools/testing/nvdimm/test/nfit.c

@@ -24,6 +24,7 @@
 #include <linux/list.h>
 #include <linux/slab.h>
 #include <nd-core.h>
+#include <intel.h>
 #include <nfit.h>
 #include <nd.h>
 #include "nfit_test.h"
@@ -148,6 +149,7 @@ static const struct nd_intel_smart smart_def = {
 		| ND_INTEL_SMART_ALARM_VALID
 		| ND_INTEL_SMART_USED_VALID
 		| ND_INTEL_SMART_SHUTDOWN_VALID
+		| ND_INTEL_SMART_SHUTDOWN_COUNT_VALID
 		| ND_INTEL_SMART_MTEMP_VALID
 		| ND_INTEL_SMART_CTEMP_VALID,
 	.health = ND_INTEL_SMART_NON_CRITICAL_HEALTH,
@@ -160,8 +162,8 @@ static const struct nd_intel_smart smart_def = {
 	.ait_status = 1,
 	.life_used = 5,
 	.shutdown_state = 0,
+	.shutdown_count = 42,
 	.vendor_size = 0,
-	.shutdown_count = 100,
 };
 
 struct nfit_test_fw {

tools/testing/nvdimm/test/nfit_test.h

@@ -117,30 +117,6 @@ struct nd_cmd_ars_err_inj_stat {
 #define ND_INTEL_SMART_INJECT_FATAL		(1 << 2)
 #define ND_INTEL_SMART_INJECT_SHUTDOWN		(1 << 3)
 
-struct nd_intel_smart {
-	__u32 status;
-	union {
-		struct {
-			__u32 flags;
-			__u8 reserved0[4];
-			__u8 health;
-			__u8 spares;
-			__u8 life_used;
-			__u8 alarm_flags;
-			__u16 media_temperature;
-			__u16 ctrl_temperature;
-			__u32 shutdown_count;
-			__u8 ait_status;
-			__u16 pmic_temperature;
-			__u8 reserved1[8];
-			__u8 shutdown_state;
-			__u32 vendor_size;
-			__u8 vendor_data[92];
-		} __packed;
-		__u8 data[128];
-	};
-} __packed;
-
 struct nd_intel_smart_threshold {
 	__u32 status;
 	union {