linux-kernel - [PATCH 1/6] s390: ccwgroup: make ccwgroup_bus

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Message-Id: <20240203-bus_cleanup-s390-v1-1-ac891afc7282@marliere.net>
Date: Sat, 03 Feb 2024 11:57:58 -0300
From: "Ricardo B. Marliere" <ricardo@...liere.net>
To: Vineeth Vijayan <vneethv@...ux.ibm.com>, 
 Peter Oberparleiter <oberpar@...ux.ibm.com>, 
 Heiko Carstens <hca@...ux.ibm.com>, Vasily Gorbik <gor@...ux.ibm.com>, 
 Alexander Gordeev <agordeev@...ux.ibm.com>, 
 Christian Borntraeger <borntraeger@...ux.ibm.com>, 
 Sven Schnelle <svens@...ux.ibm.com>, 
 Harald Freudenberger <freude@...ux.ibm.com>, 
 Tony Krowiak <akrowiak@...ux.ibm.com>, Halil Pasic <pasic@...ux.ibm.com>, 
 Jason Herne <jjherne@...ux.ibm.com>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
 linux-s390@...r.kernel.org, linux-kernel@...r.kernel.org, 
 "Ricardo B. Marliere" <ricardo@...liere.net>
Subject: [PATCH 1/6] s390: ccwgroup: make ccwgroup_bus_type const

Now that the driver core can properly handle constant struct bus_type,
move the ccwgroup_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@...uxfoundation.org>
Suggested-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Ricardo B. Marliere <ricardo@...liere.net>
---
 drivers/s390/cio/ccwgroup.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/s390/cio/ccwgroup.c b/drivers/s390/cio/ccwgroup.c
index aa3292e57e38..6eb8bcd948dc 100644
--- a/drivers/s390/cio/ccwgroup.c
+++ b/drivers/s390/cio/ccwgroup.c
@@ -31,7 +31,7 @@
  * to devices that use multiple subchannels.
  */

-static struct bus_type ccwgroup_bus_type;
+static const struct bus_type ccwgroup_bus_type;

 static void __ccwgroup_remove_symlinks(struct ccwgroup_device *gdev)
 {
@@ -465,7 +465,7 @@ static void ccwgroup_shutdown(struct device *dev)
 		gdrv->shutdown(gdev);
 }

-static struct bus_type ccwgroup_bus_type = {
+static const struct bus_type ccwgroup_bus_type = {
 	.name   = "ccwgroup",
 	.dev_groups = ccwgroup_dev_groups,
 	.remove = ccwgroup_remove,

-- 
2.43.0