linux-kernel - [PATCH] greybus: make greybus_bus

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Date: Fri,  5 Jan 2024 11:16:17 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: greybus-dev@...ts.linaro.org
Cc: linux-kernel@...r.kernel.org,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Johan Hovold <johan@...nel.org>,
	Alex Elder <elder@...nel.org>
Subject: [PATCH] greybus: make greybus_bus_type const

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@...nel.org>
Cc: Alex Elder <elder@...nel.org>
Cc: greybus-dev@...ts.linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.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