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@linuxfoundation.org>
Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ricardo B. Marliere <ricardo@marliere.net>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/20240213-bus_cleanup-i3c-v1-1-403aea18f05a@marliere.net
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

diff --git a/drivers/i3c/internals.h b/drivers/i3c/internals.h
index 908a807badaf9c0266bc33756d66091b1ee8368c..4d99a3524171b9908315bb243fee9c1a3666eb8c 100644 (file)
--- 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 3afa530c5e3220fa96c7af96a4c90f7c673393f4..f32c591ae325cf555625c8b2d1a42678cee42ee0 100644 (file)
--- 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,