HID: bpf: make bus_type const in struct hid_bpf_ops

The struct bus_type pointer in hid_bpf_ops just passes the pointer to
the driver core, and the driver core can handle, and expects, a constant
pointer, so also make the pointer constant in hid_bpf_ops.

Part of the process of moving all usages of struct bus_type to be
constant to move them all to read-only memory.

Cc: Jiri Kosina <[email protected]>
Cc: Benjamin Tissoires <[email protected]>
Cc: [email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
Signed-off-by: Jiri Kosina <[email protected]>

Author: gregkh

include/linux/hid_bpf.h

@@ -115,7 +115,7 @@ struct hid_bpf_ops {
 				  size_t len, enum hid_report_type rtype,
 				  enum hid_class_request reqtype);
 	struct module *owner;
-	struct bus_type *bus_type;
+	const struct bus_type *bus_type;
 };
 
 extern struct hid_bpf_ops *hid_bpf_ops;