linux-kernel - [PATCH] i3c: Make i3c_bus

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Date: Tue, 13 Feb 2024 11:37:31 -0300
From: "Ricardo B. Marliere" <ricardo@...liere.net>
To: Alexandre Belloni <alexandre.belloni@...tlin.com>
Cc: linux-i3c@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
 "Ricardo B. Marliere" <ricardo@...liere.net>
Subject: [PATCH] i3c: Make i3c_bus_type const

Since commit d492cc2573a0 ("driver core: device.h: make struct
bus_type a const *"), the driver core can properly handle constant
struct bus_type, move the i3c_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/i3c/internals.h | 2 +-
 drivers/i3c/master.c    | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/i3c/internals.h b/drivers/i3c/internals.h
index 908a807badaf..4d99a3524171 100644
--- a/drivers/i3c/internals.h
+++ b/drivers/i3c/internals.h
@@ -10,7 +10,7 @@

 #include <linux/i3c/master.h>

-extern struct bus_type i3c_bus_type;
+extern const struct bus_type i3c_bus_type;

 void i3c_bus_normaluse_lock(struct i3c_bus *bus);
 void i3c_bus_normaluse_unlock(struct i3c_bus *bus);
diff --git a/drivers/i3c/master.c b/drivers/i3c/master.c
index 3afa530c5e32..f32c591ae325 100644
--- a/drivers/i3c/master.c
+++ b/drivers/i3c/master.c
@@ -335,7 +335,7 @@ static void i3c_device_remove(struct device *dev)
 	i3c_device_free_ibi(i3cdev);
 }

-struct bus_type i3c_bus_type = {
+const struct bus_type i3c_bus_type = {
 	.name = "i3c",
 	.match = i3c_device_match,
 	.probe = i3c_device_probe,

---
base-commit: 4fa0888f6f3e6a67cac5afafb23e33f8222cfdd0
change-id: 20240213-bus_cleanup-i3c-f15a6a2ee30a

Best regards,
-- 
Ricardo B. Marliere <ricardo@...liere.net>