Merge tag 'libnvdimm-fixes-5.11-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm

Pull libnvdimm fixes from Dan Williams:
 "A fix for a crash scenario that has been present since the initial
  merge, a minor regression in sysfs attribute visibility, and a fix for
  some flexible array warnings.

  The bulk of this pull is an update to the libnvdimm unit test
  infrastructure to test non-ACPI platforms. Given there is zero
  regression risk for test updates, and the tests enable validation of
  bits headed towards the next merge window, I saw no reason to hold the
  new tests back. Santosh originally submitted this before the v5.11
  window opened.

  Summary:

   - Fix a crash when sysfs accesses race 'dimm' driver probe/remove.

   - Fix a regression in 'resource' attribute visibility necessary for
     mapping badblocks and other physical address interrogations.

   - Fix some flexible array warnings

   - Expand the unit test infrastructure for non-ACPI platforms"

* tag 'libnvdimm-fixes-5.11-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
  libnvdimm/dimm: Avoid race between probe and available_slots_show()
  ndtest: Add papr health related flags
  ndtest: Add nvdimm control functions
  ndtest: Add regions and mappings to the test buses
  ndtest: Add dimm attributes
  ndtest: Add dimms to the two buses
  ndtest: Add compatability string to treat it as PAPR family
  testing/nvdimm: Add test module for non-nfit platforms
  libnvdimm/namespace: Fix visibility of namespace resource attribute
  libnvdimm/pmem: Remove unused header
  ACPI: NFIT: Fix flexible_array.cocci warnings

Author: torvalds

drivers/acpi/nfit/core.c

@@ -2269,49 +2269,33 @@ static const struct attribute_group *acpi_nfit_region_attribute_groups[] = {
 
 /* enough info to uniquely specify an interleave set */
 struct nfit_set_info {
-	struct nfit_set_info_map {
-		u64 region_offset;
-		u32 serial_number;
-		u32 pad;
-	} mapping[0];
+	u64 region_offset;
+	u32 serial_number;
+	u32 pad;
 };
 
 struct nfit_set_info2 {
-	struct nfit_set_info_map2 {
-		u64 region_offset;
-		u32 serial_number;
-		u16 vendor_id;
-		u16 manufacturing_date;
-		u8  manufacturing_location;
-		u8  reserved[31];
-	} mapping[0];
+	u64 region_offset;
+	u32 serial_number;
+	u16 vendor_id;
+	u16 manufacturing_date;
+	u8 manufacturing_location;
+	u8 reserved[31];
 };
 
-static size_t sizeof_nfit_set_info(int num_mappings)
-{
-	return sizeof(struct nfit_set_info)
-		+ num_mappings * sizeof(struct nfit_set_info_map);
-}
-
-static size_t sizeof_nfit_set_info2(int num_mappings)
-{
-	return sizeof(struct nfit_set_info2)
-		+ num_mappings * sizeof(struct nfit_set_info_map2);
-}
-
 static int cmp_map_compat(const void *m0, const void *m1)
 {
-	const struct nfit_set_info_map *map0 = m0;
-	const struct nfit_set_info_map *map1 = m1;
+	const struct nfit_set_info *map0 = m0;
+	const struct nfit_set_info *map1 = m1;
 
 	return memcmp(&map0->region_offset, &map1->region_offset,
 			sizeof(u64));
 }
 
 static int cmp_map(const void *m0, const void *m1)
 {
-	const struct nfit_set_info_map *map0 = m0;
-	const struct nfit_set_info_map *map1 = m1;
+	const struct nfit_set_info *map0 = m0;
+	const struct nfit_set_info *map1 = m1;
 
 	if (map0->region_offset < map1->region_offset)
 		return -1;
@@ -2322,8 +2306,8 @@ static int cmp_map(const void *m0, const void *m1)
 
 static int cmp_map2(const void *m0, const void *m1)
 {
-	const struct nfit_set_info_map2 *map0 = m0;
-	const struct nfit_set_info_map2 *map1 = m1;
+	const struct nfit_set_info2 *map0 = m0;
+	const struct nfit_set_info2 *map1 = m1;
 
 	if (map0->region_offset < map1->region_offset)
 		return -1;
@@ -2361,22 +2345,22 @@ static int acpi_nfit_init_interleave_set(struct acpi_nfit_desc *acpi_desc,
 		return -ENOMEM;
 	import_guid(&nd_set->type_guid, spa->range_guid);
 
-	info = devm_kzalloc(dev, sizeof_nfit_set_info(nr), GFP_KERNEL);
+	info = devm_kcalloc(dev, nr, sizeof(*info), GFP_KERNEL);
 	if (!info)
 		return -ENOMEM;
 
-	info2 = devm_kzalloc(dev, sizeof_nfit_set_info2(nr), GFP_KERNEL);
+	info2 = devm_kcalloc(dev, nr, sizeof(*info2), GFP_KERNEL);
 	if (!info2)
 		return -ENOMEM;
 
 	for (i = 0; i < nr; i++) {
 		struct nd_mapping_desc *mapping = &ndr_desc->mapping[i];
-		struct nfit_set_info_map *map = &info->mapping[i];
-		struct nfit_set_info_map2 *map2 = &info2->mapping[i];
 		struct nvdimm *nvdimm = mapping->nvdimm;
 		struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
-		struct acpi_nfit_memory_map *memdev = memdev_from_spa(acpi_desc,
-				spa->range_index, i);
+		struct nfit_set_info *map = &info[i];
+		struct nfit_set_info2 *map2 = &info2[i];
+		struct acpi_nfit_memory_map *memdev =
+			memdev_from_spa(acpi_desc, spa->range_index, i);
 		struct acpi_nfit_control_region *dcr = nfit_mem->dcr;
 
 		if (!memdev || !nfit_mem->dcr) {
@@ -2395,23 +2379,20 @@ static int acpi_nfit_init_interleave_set(struct acpi_nfit_desc *acpi_desc,
 	}
 
 	/* v1.1 namespaces */
-	sort(&info->mapping[0], nr, sizeof(struct nfit_set_info_map),
-			cmp_map, NULL);
-	nd_set->cookie1 = nd_fletcher64(info, sizeof_nfit_set_info(nr), 0);
+	sort(info, nr, sizeof(*info), cmp_map, NULL);
+	nd_set->cookie1 = nd_fletcher64(info, sizeof(*info) * nr, 0);
 
 	/* v1.2 namespaces */
-	sort(&info2->mapping[0], nr, sizeof(struct nfit_set_info_map2),
-			cmp_map2, NULL);
-	nd_set->cookie2 = nd_fletcher64(info2, sizeof_nfit_set_info2(nr), 0);
+	sort(info2, nr, sizeof(*info2), cmp_map2, NULL);
+	nd_set->cookie2 = nd_fletcher64(info2, sizeof(*info2) * nr, 0);
 
 	/* support v1.1 namespaces created with the wrong sort order */
-	sort(&info->mapping[0], nr, sizeof(struct nfit_set_info_map),
-			cmp_map_compat, NULL);
-	nd_set->altcookie = nd_fletcher64(info, sizeof_nfit_set_info(nr), 0);
+	sort(info, nr, sizeof(*info), cmp_map_compat, NULL);
+	nd_set->altcookie = nd_fletcher64(info, sizeof(*info) * nr, 0);
 
 	/* record the result of the sort for the mapping position */
 	for (i = 0; i < nr; i++) {
-		struct nfit_set_info_map2 *map2 = &info2->mapping[i];
+		struct nfit_set_info2 *map2 = &info2[i];
 		int j;
 
 		for (j = 0; j < nr; j++) {

drivers/nvdimm/dimm_devs.c

@@ -335,16 +335,16 @@ static ssize_t state_show(struct device *dev, struct device_attribute *attr,
 }
 static DEVICE_ATTR_RO(state);
 
-static ssize_t available_slots_show(struct device *dev,
-		struct device_attribute *attr, char *buf)
+static ssize_t __available_slots_show(struct nvdimm_drvdata *ndd, char *buf)
 {
-	struct nvdimm_drvdata *ndd = dev_get_drvdata(dev);
+	struct device *dev;
 	ssize_t rc;
 	u32 nfree;
 
 	if (!ndd)
 		return -ENXIO;
 
+	dev = ndd->dev;
 	nvdimm_bus_lock(dev);
 	nfree = nd_label_nfree(ndd);
 	if (nfree - 1 > nfree) {
@@ -356,6 +356,18 @@ static ssize_t available_slots_show(struct device *dev,
 	nvdimm_bus_unlock(dev);
 	return rc;
 }
+
+static ssize_t available_slots_show(struct device *dev,
+				    struct device_attribute *attr, char *buf)
+{
+	ssize_t rc;
+
+	nd_device_lock(dev);
+	rc = __available_slots_show(dev_get_drvdata(dev), buf);
+	nd_device_unlock(dev);
+
+	return rc;
+}
 static DEVICE_ATTR_RO(available_slots);
 
 __weak ssize_t security_show(struct device *dev,

drivers/nvdimm/namespace_devs.c

@@ -1635,11 +1635,11 @@ static umode_t namespace_visible(struct kobject *kobj,
 		return a->mode;
 	}
 
-	if (a == &dev_attr_nstype.attr || a == &dev_attr_size.attr
-			|| a == &dev_attr_holder.attr
-			|| a == &dev_attr_holder_class.attr
-			|| a == &dev_attr_force_raw.attr
-			|| a == &dev_attr_mode.attr)
+	/* base is_namespace_io() attributes */
+	if (a == &dev_attr_nstype.attr || a == &dev_attr_size.attr ||
+	    a == &dev_attr_holder.attr || a == &dev_attr_holder_class.attr ||
+	    a == &dev_attr_force_raw.attr || a == &dev_attr_mode.attr ||
+	    a == &dev_attr_resource.attr)
 		return a->mode;
 
 	return 0;

drivers/nvdimm/pmem.c

@@ -23,7 +23,6 @@
 #include <linux/uio.h>
 #include <linux/dax.h>
 #include <linux/nd.h>
-#include <linux/backing-dev.h>
 #include <linux/mm.h>
 #include <asm/cacheflush.h>
 #include "pmem.h"

tools/testing/nvdimm/config_check.c

@@ -12,7 +12,8 @@ void check(void)
 	BUILD_BUG_ON(!IS_MODULE(CONFIG_ND_BTT));
 	BUILD_BUG_ON(!IS_MODULE(CONFIG_ND_PFN));
 	BUILD_BUG_ON(!IS_MODULE(CONFIG_ND_BLK));
-	BUILD_BUG_ON(!IS_MODULE(CONFIG_ACPI_NFIT));
+	if (IS_ENABLED(CONFIG_ACPI_NFIT))
+		BUILD_BUG_ON(!IS_MODULE(CONFIG_ACPI_NFIT));
 	BUILD_BUG_ON(!IS_MODULE(CONFIG_DEV_DAX));
 	BUILD_BUG_ON(!IS_MODULE(CONFIG_DEV_DAX_PMEM));
 }

tools/testing/nvdimm/test/Kbuild

@@ -5,5 +5,9 @@ ccflags-y += -I$(srctree)/drivers/acpi/nfit/
 obj-m += nfit_test.o
 obj-m += nfit_test_iomap.o
 
-nfit_test-y := nfit.o
+ifeq  ($(CONFIG_ACPI_NFIT),m)
+	nfit_test-y := nfit.o
+else
+	nfit_test-y := ndtest.o
+endif
 nfit_test_iomap-y := iomap.o