driver core: class: make namespace and get_ownership take const *

The callbacks in struct class namespace() and get_ownership() do not
modify the struct device passed to them, so mark the pointer as constant
and fix up all callbacks in the kernel to have the correct function
signature.

This helps make it more obvious what calls and callbacks do, and do not,
modify structures passed to them.

Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Link: https://lore.kernel.org/r/20221001165426.2690912-1-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/include/linux/device/class.h b/include/linux/device/class.h
index e61ec5502019..20103e0b03c3 100644
--- a/include/linux/device/class.h
+++ b/include/linux/device/class.h
@@ -68,9 +68,9 @@ struct class {
 	int (*shutdown_pre)(struct device *dev);
 
 	const struct kobj_ns_type_operations *ns_type;
-	const void *(*namespace)(struct device *dev);
+	const void *(*namespace)(const struct device *dev);
 
-	void (*get_ownership)(struct device *dev, kuid_t *uid, kgid_t *gid);
+	void (*get_ownership)(const struct device *dev, kuid_t *uid, kgid_t *gid);
 
 	const struct dev_pm_ops *pm;