driver core: class: make class_find_device*() options const

The class_find_device*() functions do not modify the struct class or the
struct device passed into it, so mark them as const * to enforce that.

Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Link: https://lore.kernel.org/r/20230313181843.1207845-7-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/base/class.c b/drivers/base/class.c
index 4937d660c57110674899a2575e71ccc64abde231..52ba0187e66dc364a9956979aa4a44405f4c5ffa 100644 (file)
--- a/drivers/base/class.c
+++ b/drivers/base/class.c
@@ -402,7 +402,7 @@ EXPORT_SYMBOL_GPL(class_for_each_device);
  * @match is allowed to do anything including calling back into class
  * code.  There's no locking restriction.
  */
-struct device *class_find_device(struct class *class, struct device *start,
+struct device *class_find_device(const struct class *class, const struct device *start,
                                 const void *data,
                                 int (*match)(struct device *, const void *))
 {

diff --git a/include/linux/device/class.h b/include/linux/device/class.h
index fdbcd487e50879a34edaa013e743bb750d0ec647..dfa8958105e735a8b1e846168ebff9ccd20c63b0 100644 (file)
--- a/include/linux/device/class.h
+++ b/include/linux/device/class.h
@@ -112,8 +112,8 @@ extern void class_dev_iter_exit(struct class_dev_iter *iter);
 extern int class_for_each_device(const struct class *class, const struct device *start,
                                 void *data,
                                 int (*fn)(struct device *dev, void *data));
-extern struct device *class_find_device(struct class *class,
-                                       struct device *start, const void *data,
+extern struct device *class_find_device(const struct class *class,
+                                       const struct device *start, const void *data,
                                        int (*match)(struct device *, const void *));
 
 /**
@@ -122,7 +122,7 @@ extern struct device *class_find_device(struct class *class,
  * @class: class type
  * @name: name of the device to match
  */
-static inline struct device *class_find_device_by_name(struct class *class,
+static inline struct device *class_find_device_by_name(const struct class *class,
                                                       const char *name)
 {
        return class_find_device(class, NULL, name, device_match_name);
@@ -134,8 +134,8 @@ static inline struct device *class_find_device_by_name(struct class *class,
  * @class: class type
  * @np: of_node of the device to match.
  */
-static inline struct device *
-class_find_device_by_of_node(struct class *class, const struct device_node *np)
+static inline struct device *class_find_device_by_of_node(const struct class *class,
+                                                         const struct device_node *np)
 {
        return class_find_device(class, NULL, np, device_match_of_node);
 }
@@ -146,9 +146,8 @@ class_find_device_by_of_node(struct class *class, const struct device_node *np)
  * @class: class type
  * @fwnode: fwnode of the device to match.
  */
-static inline struct device *
-class_find_device_by_fwnode(struct class *class,
-                           const struct fwnode_handle *fwnode)
+static inline struct device *class_find_device_by_fwnode(const struct class *class,
+                                                        const struct fwnode_handle *fwnode)
 {
        return class_find_device(class, NULL, fwnode, device_match_fwnode);
 }
@@ -159,7 +158,7 @@ class_find_device_by_fwnode(struct class *class,
  * @class: class type
  * @devt: device type of the device to match.
  */
-static inline struct device *class_find_device_by_devt(struct class *class,
+static inline struct device *class_find_device_by_devt(const struct class *class,
                                                       dev_t devt)
 {
        return class_find_device(class, NULL, &devt, device_match_devt);
@@ -173,14 +172,14 @@ struct acpi_device;
  * @class: class type
  * @adev: ACPI_COMPANION device to match.
  */
-static inline struct device *
-class_find_device_by_acpi_dev(struct class *class, const struct acpi_device *adev)
+static inline struct device *class_find_device_by_acpi_dev(const struct class *class,
+                                                          const struct acpi_device *adev)
 {
        return class_find_device(class, NULL, adev, device_match_acpi_dev);
 }
 #else
-static inline struct device *
-class_find_device_by_acpi_dev(struct class *class, const void *adev)
+static inline struct device *class_find_device_by_acpi_dev(const struct class *class,
+                                                          const void *adev)
 {
        return NULL;
 }