add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/nvdimm/dax_devs.c
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@@ -1,14 +1,6 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * Copyright(c) 2013-2016 Intel Corporation. All rights reserved.
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of version 2 of the GNU General Public License as
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- * published by the Free Software Foundation.
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- *
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- * This program is distributed in the hope that it will be useful, but
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- * WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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- * General Public License for more details.
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  */
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 #include <linux/device.h>
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 #include <linux/sizes.h>
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@@ -31,17 +23,6 @@
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 	kfree(nd_dax);
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 }
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-static struct device_type nd_dax_device_type = {
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-	.name = "nd_dax",
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-	.release = nd_dax_release,
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-};
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-
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-bool is_nd_dax(struct device *dev)
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-{
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-	return dev ? dev->type == &nd_dax_device_type : false;
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-}
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-EXPORT_SYMBOL(is_nd_dax);
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-
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 struct nd_dax *to_nd_dax(struct device *dev)
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 {
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 	struct nd_dax *nd_dax = container_of(dev, struct nd_dax, nd_pfn.dev);
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@@ -51,12 +32,17 @@
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 }
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 EXPORT_SYMBOL(to_nd_dax);
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-static const struct attribute_group *nd_dax_attribute_groups[] = {
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-	&nd_pfn_attribute_group,
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-	&nd_device_attribute_group,
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-	&nd_numa_attribute_group,
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-	NULL,
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+static const struct device_type nd_dax_device_type = {
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+	.name = "nd_dax",
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+	.release = nd_dax_release,
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+	.groups = nd_pfn_attribute_groups,
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 };
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+
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+bool is_nd_dax(struct device *dev)
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+{
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+	return dev ? dev->type == &nd_dax_device_type : false;
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+}
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+EXPORT_SYMBOL(is_nd_dax);
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 static struct nd_dax *nd_dax_alloc(struct nd_region *nd_region)
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 {
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@@ -77,7 +63,6 @@
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 	dev = &nd_pfn->dev;
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 	dev_set_name(dev, "dax%d.%d", nd_region->id, nd_pfn->id);
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-	dev->groups = nd_dax_attribute_groups;
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 	dev->type = &nd_dax_device_type;
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 	dev->parent = &nd_region->dev;
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