s390/cio: make ccw_bus_type const

Now that the driver core can properly handle constant struct bus_type,
move the ccw_bus_type variable to be a constant structure as well,
placing it into read-only memory which can not be modified at runtime.

Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: "Ricardo B. Marliere" <ricardo@marliere.net>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/20240203-bus_cleanup-s390-v1-3-ac891afc7282@marliere.net
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>

diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c
index 0cfb179e1bcb61d59be433b7a0e47c7bf7cabd9d..f95d12345d98a6dbfd1efa850829586852d409ab 100644 (file)
--- a/drivers/s390/cio/device.c
+++ b/drivers/s390/cio/device.c
@@ -49,7 +49,7 @@ static const unsigned long recovery_delay[] = { 3, 30, 300 };
 
 static atomic_t ccw_device_init_count = ATOMIC_INIT(0);
 static DECLARE_WAIT_QUEUE_HEAD(ccw_device_init_wq);
-static struct bus_type ccw_bus_type;
+static const struct bus_type ccw_bus_type;
 
 /******************* bus type handling ***********************/
 
@@ -1776,7 +1776,7 @@ static void ccw_device_shutdown(struct device *dev)
        __disable_cmf(cdev);
 }
 
-static struct bus_type ccw_bus_type = {
+static const struct bus_type ccw_bus_type = {
        .name   = "ccw",
        .match  = ccw_bus_match,
        .uevent = ccw_uevent,