linux-kernel - [PATCH v2] iucv: make iucv

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Message-ID: <2023122017-shelf-cadet-309c@gregkh>
Date: Wed, 20 Dec 2023 08:41:18 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: wintera@...ux.ibm.com,
	wenjia@...ux.ibm.com
Cc: linux-kernel@...r.kernel.org,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	linux-s390@...r.kernel.org,
	netdev@...r.kernel.org
Subject: [PATCH v2] iucv: make iucv_bus const

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

Cc: Wenjia Zhang <wenjia@...ux.ibm.com>
Cc: "David S. Miller" <davem@...emloft.net>
Cc: Eric Dumazet <edumazet@...gle.com>
Cc: Jakub Kicinski <kuba@...nel.org>
Cc: Paolo Abeni <pabeni@...hat.com>
Cc: linux-s390@...r.kernel.org
Cc: netdev@...r.kernel.org
Acked-by: Alexandra Winter <wintera@...ux.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
v2: add Alexandra ack
    fix typo in subject line as pointed out by Niklas

 include/net/iucv/iucv.h | 4 ++--
 net/iucv/iucv.c         | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/include/net/iucv/iucv.h b/include/net/iucv/iucv.h
index f9e88401d7da..8b2055d64a6b 100644
--- a/include/net/iucv/iucv.h
+++ b/include/net/iucv/iucv.h
@@ -80,7 +80,7 @@ struct iucv_array {
 	u32 length;
 } __attribute__ ((aligned (8)));
 
-extern struct bus_type iucv_bus;
+extern const struct bus_type iucv_bus;
 extern struct device *iucv_root;
 
 /*
@@ -489,7 +489,7 @@ struct iucv_interface {
 	int (*path_sever)(struct iucv_path *path, u8 userdata[16]);
 	int (*iucv_register)(struct iucv_handler *handler, int smp);
 	void (*iucv_unregister)(struct iucv_handler *handler, int smp);
-	struct bus_type *bus;
+	const struct bus_type *bus;
 	struct device *root;
 };
 
diff --git a/net/iucv/iucv.c b/net/iucv/iucv.c
index 0ed6e34d6edd..6334f64f04d5 100644
--- a/net/iucv/iucv.c
+++ b/net/iucv/iucv.c
@@ -67,7 +67,7 @@ static int iucv_bus_match(struct device *dev, struct device_driver *drv)
 	return 0;
 }
 
-struct bus_type iucv_bus = {
+const struct bus_type iucv_bus = {
 	.name = "iucv",
 	.match = iucv_bus_match,
 };
-- 
2.43.0