linux-kernel - [PATCH 3/5] driver core: class: mark the struct class in struct class

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Date:   Sun,  2 Apr 2023 19:58:48 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     rafael@...nel.org, Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: [PATCH 3/5] driver core: class: mark the struct class in struct class_interface constant

The struct class pointer in struct class_interface is never modified, so
mark it as const so that no one accidentally tries to modify it in the
future.

Cc: "Rafael J. Wysocki" <rafael@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/base/class.c         | 2 +-
 include/linux/device/class.h | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/base/class.c b/drivers/base/class.c
index 05bce79d3d19..ad8b9f163fd2 100644
--- a/drivers/base/class.c
+++ b/drivers/base/class.c
@@ -498,7 +498,7 @@ EXPORT_SYMBOL_GPL(class_interface_register);
 void class_interface_unregister(struct class_interface *class_intf)
 {
 	struct subsys_private *sp;
-	struct class *parent = class_intf->class;
+	const struct class *parent = class_intf->class;
 	struct class_dev_iter iter;
 	struct device *dev;
 
diff --git a/include/linux/device/class.h b/include/linux/device/class.h
index 4bf46f9bbb56..53287aa105b8 100644
--- a/include/linux/device/class.h
+++ b/include/linux/device/class.h
@@ -217,7 +217,7 @@ ssize_t show_class_attr_string(const struct class *class, const struct class_att
 
 struct class_interface {
 	struct list_head	node;
-	struct class		*class;
+	const struct class	*class;
 
 	int (*add_dev)		(struct device *, struct class_interface *);
 	void (*remove_dev)	(struct device *, struct class_interface *);
-- 
2.40.0