[PATCH] greybus: make greybus_bus_type const

[PATCH] greybus: make greybus_bus_type const

[Greg Kroah-Hartman]

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

Cc: Johan Hovold <johan@kernel.org>
Cc: Alex Elder <elder@kernel.org>
Cc: greybus-dev@lists.linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/greybus/core.c  | 2 +-
 include/linux/greybus.h | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/greybus/core.c b/drivers/greybus/core.c
index 5714be740470..b0aadc1e7bbe 100644
--- a/drivers/greybus/core.c
+++ b/drivers/greybus/core.c
@@ -155,7 +155,7 @@ static void greybus_shutdown(struct device *dev)
 	}
 }
 
-struct bus_type greybus_bus_type = {
+const struct bus_type greybus_bus_type = {
 	.name =		"greybus",
 	.match =	greybus_match_device,
 	.uevent =	greybus_uevent,
diff --git a/include/linux/greybus.h b/include/linux/greybus.h
index 18c0fb958b74..92da9ec4f5f0 100644
--- a/include/linux/greybus.h
+++ b/include/linux/greybus.h
@@ -104,7 +104,7 @@ void gb_debugfs_init(void);
 void gb_debugfs_cleanup(void);
 struct dentry *gb_debugfs_get(void);
 
-extern struct bus_type greybus_bus_type;
+extern const struct bus_type greybus_bus_type;
 
 extern struct device_type greybus_hd_type;
 extern struct device_type greybus_module_type;
-- 
2.43.0

Re: [PATCH] greybus: make greybus_bus_type const

[Johan Hovold]

On Fri, Jan 05, 2024 at 11:16:17AM +0100, Greg Kroah-Hartman wrote:
> Now that the driver core can properly handle constant struct bus_type,
> move the greybus_bus_type variable to be a constant structure as well,
> placing it into read-only memory which can not be modified at runtime.
> 
> Cc: Johan Hovold <johan@kernel.org>
> Cc: Alex Elder <elder@kernel.org>
> Cc: greybus-dev@lists.linaro.org
> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Reviewed-by: Johan Hovold <johan@kernel.org>