driver core: make struct device_type.devnode() take a const *

The devnode() callback in struct device_type should not be modifying the
device that is passed into it, so mark it as a const * and propagate the
function signature changes out into all relevant subsystems that use
this callback.

Cc: Jens Axboe <[email protected]>
Cc: Alison Schofield <[email protected]>
Cc: Vishal Verma <[email protected]>
Cc: Ira Weiny <[email protected]>
Cc: Ben Widawsky <[email protected]>
Cc: Jeremy Kerr <[email protected]>
Cc: Joel Stanley <[email protected]>
Cc: Alistar Popple <[email protected]>
Cc: Eddie James <[email protected]>
Cc: Jonathan Cameron <[email protected]>
Cc: Jilin Yuan <[email protected]>
Cc: Heikki Krogerus <[email protected]>
Cc: Alan Stern <[email protected]>
Cc: Andy Shevchenko <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Jason Gunthorpe <[email protected]>
Cc: "Rafael J. Wysocki" <[email protected]>
Cc: Won Chung <[email protected]>
Acked-by: Dan Williams <[email protected]>
Acked-by: Alexander Shishkin <[email protected]>
Acked-by: Hans de Goede <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

1 files changed, 1 insertions, 1 deletions

diff --git a/include/linux/device.h b/include/linux/device.h
index dad0614aad96..318861000b83 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -89,7 +89,7 @@ struct device_type {
 	const char *name;
 	const struct attribute_group **groups;
 	int (*uevent)(const struct device *dev, struct kobj_uevent_env *env);
-	char *(*devnode)(struct device *dev, umode_t *mode,
+	char *(*devnode)(const struct device *dev, umode_t *mode,
 			 kuid_t *uid, kgid_t *gid);
 	void (*release)(struct device *dev);