linux-kernel - [PATCH 1/2] staging: vc04_services: vchiq_arm: make vchiq_bus

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Date: Thu, 08 Feb 2024 16:17:51 -0300
From: "Ricardo B. Marliere" <ricardo@...liere.net>
To: Florian Fainelli <florian.fainelli@...adcom.com>, 
 Broadcom internal kernel review list <bcm-kernel-feedback-list@...adcom.com>, 
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: linux-rpi-kernel@...ts.infradead.org, 
 linux-arm-kernel@...ts.infradead.org, linux-staging@...ts.linux.dev, 
 linux-kernel@...r.kernel.org, "Ricardo B. Marliere" <ricardo@...liere.net>
Subject: [PATCH 1/2] staging: vc04_services: vchiq_arm: make vchiq_bus_type
 const

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

Suggested-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Ricardo B. Marliere <ricardo@...liere.net>
---
 drivers/staging/vc04_services/interface/vchiq_arm/vchiq_bus.c | 2 +-
 drivers/staging/vc04_services/interface/vchiq_arm/vchiq_bus.h | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_bus.c b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_bus.c
index 933027e0011e..68f830d75531 100644
--- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_bus.c
+++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_bus.c
@@ -37,7 +37,7 @@ static int vchiq_bus_probe(struct device *dev)
 	return driver->probe(device);
 }

-struct bus_type vchiq_bus_type = {
+const struct bus_type vchiq_bus_type = {
 	.name   = "vchiq-bus",
 	.match  = vchiq_bus_type_match,
 	.uevent = vchiq_bus_uevent,
diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_bus.h b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_bus.h
index caa6fdf25bb1..4db86e76edbd 100644
--- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_bus.h
+++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_bus.h
@@ -34,7 +34,7 @@ static inline struct vchiq_driver *to_vchiq_driver(struct device_driver *d)
 	return container_of(d, struct vchiq_driver, driver);
 }

-extern struct bus_type vchiq_bus_type;
+extern const struct bus_type vchiq_bus_type;

 struct vchiq_device *
 vchiq_device_register(struct device *parent, const char *name);

-- 
2.43.0