1 files changed, 52 insertions, 111 deletions

diff --git a/drivers/nvdimm/region_devs.c b/drivers/nvdimm/region_devs.c
index 9e4f7ff024a0..1220530a23b6 100644
--- a/drivers/nvdimm/region_devs.c
+++ b/drivers/nvdimm/region_devs.c
@@ -90,7 +90,7 @@ static int nd_region_invalidate_memregion(struct nd_region *nd_region)
 		}
 	}
 
-	cpu_cache_invalidate_memregion(IORES_DESC_PERSISTENT_MEMORY);
+	cpu_cache_invalidate_all();
 out:
 	for (i = 0; i < nd_region->ndr_mappings; i++) {
 		struct nd_mapping *nd_mapping = &nd_region->mapping[i];
@@ -102,31 +102,44 @@ out:
 	return 0;
 }
 
-int nd_region_activate(struct nd_region *nd_region)
+static int get_flush_data(struct nd_region *nd_region, size_t *size, int *num_flush)
 {
-	int i, j, rc, num_flush = 0;
-	struct nd_region_data *ndrd;
-	struct device *dev = &nd_region->dev;
 	size_t flush_data_size = sizeof(void *);
+	int _num_flush = 0;
+	int i;
 
-	nvdimm_bus_lock(&nd_region->dev);
+	guard(nvdimm_bus)(&nd_region->dev);
 	for (i = 0; i < nd_region->ndr_mappings; i++) {
 		struct nd_mapping *nd_mapping = &nd_region->mapping[i];
 		struct nvdimm *nvdimm = nd_mapping->nvdimm;
 
-		if (test_bit(NDD_SECURITY_OVERWRITE, &nvdimm->flags)) {
-			nvdimm_bus_unlock(&nd_region->dev);
+		if (test_bit(NDD_SECURITY_OVERWRITE, &nvdimm->flags))
 			return -EBUSY;
-		}
 
 		/* at least one null hint slot per-dimm for the "no-hint" case */
 		flush_data_size += sizeof(void *);
-		num_flush = min_not_zero(num_flush, nvdimm->num_flush);
+		_num_flush = min_not_zero(_num_flush, nvdimm->num_flush);
 		if (!nvdimm->num_flush)
 			continue;
 		flush_data_size += nvdimm->num_flush * sizeof(void *);
 	}
-	nvdimm_bus_unlock(&nd_region->dev);
+
+	*size = flush_data_size;
+	*num_flush = _num_flush;
+
+	return 0;
+}
+
+int nd_region_activate(struct nd_region *nd_region)
+{
+	int i, j, rc, num_flush;
+	struct nd_region_data *ndrd;
+	struct device *dev = &nd_region->dev;
+	size_t flush_data_size;
+
+	rc = get_flush_data(nd_region, &flush_data_size, &num_flush);
+	if (rc)
+		return rc;
 
 	rc = nd_region_invalidate_memregion(nd_region);
 	if (rc)
@@ -327,8 +340,8 @@ static ssize_t set_cookie_show(struct device *dev,
 	 * the v1.1 namespace label cookie definition. To read all this
 	 * data we need to wait for probing to settle.
 	 */
-	device_lock(dev);
-	nvdimm_bus_lock(dev);
+	guard(device)(dev);
+	guard(nvdimm_bus)(dev);
 	wait_nvdimm_bus_probe_idle(dev);
 	if (nd_region->ndr_mappings) {
 		struct nd_mapping *nd_mapping = &nd_region->mapping[0];
@@ -343,8 +356,6 @@ static ssize_t set_cookie_show(struct device *dev,
 						nsindex));
 		}
 	}
-	nvdimm_bus_unlock(dev);
-	device_unlock(dev);
 
 	if (rc)
 		return rc;
@@ -393,7 +404,6 @@ static ssize_t available_size_show(struct device *dev,
 		struct device_attribute *attr, char *buf)
 {
 	struct nd_region *nd_region = to_nd_region(dev);
-	unsigned long long available = 0;
 
 	/*
 	 * Flush in-flight updates and grab a snapshot of the available
@@ -401,14 +411,11 @@ static ssize_t available_size_show(struct device *dev,
 	 * memory nvdimm_bus_lock() is dropped, but that's userspace's
 	 * problem to not race itself.
 	 */
-	device_lock(dev);
-	nvdimm_bus_lock(dev);
+	guard(device)(dev);
+	guard(nvdimm_bus)(dev);
 	wait_nvdimm_bus_probe_idle(dev);
-	available = nd_region_available_dpa(nd_region);
-	nvdimm_bus_unlock(dev);
-	device_unlock(dev);
 
-	return sprintf(buf, "%llu\n", available);
+	return sprintf(buf, "%llu\n", nd_region_available_dpa(nd_region));
 }
 static DEVICE_ATTR_RO(available_size);
 
@@ -416,16 +423,12 @@ static ssize_t max_available_extent_show(struct device *dev,
 		struct device_attribute *attr, char *buf)
 {
 	struct nd_region *nd_region = to_nd_region(dev);
-	unsigned long long available = 0;
 
-	device_lock(dev);
-	nvdimm_bus_lock(dev);
+	guard(device)(dev);
+	guard(nvdimm_bus)(dev);
 	wait_nvdimm_bus_probe_idle(dev);
-	available = nd_region_allocatable_dpa(nd_region);
-	nvdimm_bus_unlock(dev);
-	device_unlock(dev);
 
-	return sprintf(buf, "%llu\n", available);
+	return sprintf(buf, "%llu\n", nd_region_allocatable_dpa(nd_region));
 }
 static DEVICE_ATTR_RO(max_available_extent);
 
@@ -433,16 +436,12 @@ static ssize_t init_namespaces_show(struct device *dev,
 		struct device_attribute *attr, char *buf)
 {
 	struct nd_region_data *ndrd = dev_get_drvdata(dev);
-	ssize_t rc;
 
-	nvdimm_bus_lock(dev);
-	if (ndrd)
-		rc = sprintf(buf, "%d/%d\n", ndrd->ns_active, ndrd->ns_count);
-	else
-		rc = -ENXIO;
-	nvdimm_bus_unlock(dev);
+	guard(nvdimm_bus)(dev);
+	if (!ndrd)
+		return -ENXIO;
 
-	return rc;
+	return sprintf(buf, "%d/%d\n", ndrd->ns_active, ndrd->ns_count);
 }
 static DEVICE_ATTR_RO(init_namespaces);
 
@@ -450,15 +449,12 @@ static ssize_t namespace_seed_show(struct device *dev,
 		struct device_attribute *attr, char *buf)
 {
 	struct nd_region *nd_region = to_nd_region(dev);
-	ssize_t rc;
 
-	nvdimm_bus_lock(dev);
+	guard(nvdimm_bus)(dev);
 	if (nd_region->ns_seed)
-		rc = sprintf(buf, "%s\n", dev_name(nd_region->ns_seed));
-	else
-		rc = sprintf(buf, "\n");
-	nvdimm_bus_unlock(dev);
-	return rc;
+		return sprintf(buf, "%s\n", dev_name(nd_region->ns_seed));
+
+	return sprintf(buf, "\n");
 }
 static DEVICE_ATTR_RO(namespace_seed);
 
@@ -466,16 +462,12 @@ static ssize_t btt_seed_show(struct device *dev,
 		struct device_attribute *attr, char *buf)
 {
 	struct nd_region *nd_region = to_nd_region(dev);
-	ssize_t rc;
 
-	nvdimm_bus_lock(dev);
+	guard(nvdimm_bus)(dev);
 	if (nd_region->btt_seed)
-		rc = sprintf(buf, "%s\n", dev_name(nd_region->btt_seed));
-	else
-		rc = sprintf(buf, "\n");
-	nvdimm_bus_unlock(dev);
+		return sprintf(buf, "%s\n", dev_name(nd_region->btt_seed));
 
-	return rc;
+	return sprintf(buf, "\n");
 }
 static DEVICE_ATTR_RO(btt_seed);
 
@@ -483,16 +475,12 @@ static ssize_t pfn_seed_show(struct device *dev,
 		struct device_attribute *attr, char *buf)
 {
 	struct nd_region *nd_region = to_nd_region(dev);
-	ssize_t rc;
 
-	nvdimm_bus_lock(dev);
+	guard(nvdimm_bus)(dev);
 	if (nd_region->pfn_seed)
-		rc = sprintf(buf, "%s\n", dev_name(nd_region->pfn_seed));
-	else
-		rc = sprintf(buf, "\n");
-	nvdimm_bus_unlock(dev);
+		return sprintf(buf, "%s\n", dev_name(nd_region->pfn_seed));
 
-	return rc;
+	return sprintf(buf, "\n");
 }
 static DEVICE_ATTR_RO(pfn_seed);
 
@@ -500,16 +488,12 @@ static ssize_t dax_seed_show(struct device *dev,
 		struct device_attribute *attr, char *buf)
 {
 	struct nd_region *nd_region = to_nd_region(dev);
-	ssize_t rc;
 
-	nvdimm_bus_lock(dev);
+	guard(nvdimm_bus)(dev);
 	if (nd_region->dax_seed)
-		rc = sprintf(buf, "%s\n", dev_name(nd_region->dax_seed));
-	else
-		rc = sprintf(buf, "\n");
-	nvdimm_bus_unlock(dev);
+		return sprintf(buf, "%s\n", dev_name(nd_region->dax_seed));
 
-	return rc;
+	return sprintf(buf, "\n");
 }
 static DEVICE_ATTR_RO(dax_seed);
 
@@ -581,9 +565,8 @@ static ssize_t align_store(struct device *dev,
 	 * times ensure it does not change for the duration of the
 	 * allocation.
 	 */
-	nvdimm_bus_lock(dev);
+	guard(nvdimm_bus)(dev);
 	nd_region->align = val;
-	nvdimm_bus_unlock(dev);
 
 	return len;
 }
@@ -890,7 +873,7 @@ void nd_mapping_free_labels(struct nd_mapping *nd_mapping)
  */
 void nd_region_advance_seeds(struct nd_region *nd_region, struct device *dev)
 {
-	nvdimm_bus_lock(dev);
+	guard(nvdimm_bus)(dev);
 	if (nd_region->ns_seed == dev) {
 		nd_region_create_ns_seed(nd_region);
 	} else if (is_nd_btt(dev)) {
@@ -915,7 +898,6 @@ void nd_region_advance_seeds(struct nd_region *nd_region, struct device *dev)
 		if (nd_region->ns_seed == &nd_dax->nd_pfn.ndns->dev)
 			nd_region_create_ns_seed(nd_region);
 	}
-	nvdimm_bus_unlock(dev);
 }
 
 /**
@@ -1229,45 +1211,4 @@ bool is_nvdimm_sync(struct nd_region *nd_region)
 }
 EXPORT_SYMBOL_GPL(is_nvdimm_sync);
 
-struct conflict_context {
-	struct nd_region *nd_region;
-	resource_size_t start, size;
-};
-
-static int region_conflict(struct device *dev, void *data)
-{
-	struct nd_region *nd_region;
-	struct conflict_context *ctx = data;
-	resource_size_t res_end, region_end, region_start;
-
-	if (!is_memory(dev))
-		return 0;
-
-	nd_region = to_nd_region(dev);
-	if (nd_region == ctx->nd_region)
-		return 0;
-
-	res_end = ctx->start + ctx->size;
-	region_start = nd_region->ndr_start;
-	region_end = region_start + nd_region->ndr_size;
-	if (ctx->start >= region_start && ctx->start < region_end)
-		return -EBUSY;
-	if (res_end > region_start && res_end <= region_end)
-		return -EBUSY;
-	return 0;
-}
-
-int nd_region_conflict(struct nd_region *nd_region, resource_size_t start,
-		resource_size_t size)
-{
-	struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(&nd_region->dev);
-	struct conflict_context ctx = {
-		.nd_region = nd_region,
-		.start = start,
-		.size = size,
-	};
-
-	return device_for_each_child(&nvdimm_bus->dev, &ctx, region_conflict);
-}
-
-MODULE_IMPORT_NS(DEVMEM);
+MODULE_IMPORT_NS("DEVMEM");