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i2c: make i2c_bus_type const

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Now that the driver core can properly handle constant struct bus_type,
move the i2c_bus_type variable to be a constant structure as well, placing
it into read-only memory which can not be modified at runtime.

Note, the sound/soc/rockchip/rk3399_gru_sound.c also needed tweaking as
it decided to save off a pointer to a bus type for internal stuff, and
it was using the i2c_bus_type as well.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
This commit is contained in:
Greg Kroah-Hartman 2023-12-19 16:22:43 +01:00 committed by Wolfram Sang
parent 614ef4d30f
commit 94959c0e79
3 changed files with 3 additions and 3 deletions
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2
drivers/i2c/i2c-core-base.c
View File

@ -692,7 +692,7 @@ static struct attribute *i2c_dev_attrs[] = {
};
ATTRIBUTE_GROUPS(i2c_dev);
struct bus_type i2c_bus_type = {
const struct bus_type i2c_bus_type = {
.name = "i2c",
.match = i2c_device_match,
.probe = i2c_device_probe,

2
include/linux/i2c.h
View File

@ -23,7 +23,7 @@
#include <linux/swab.h> /* for swab16 */
#include <uapi/linux/i2c.h>
extern struct bus_type i2c_bus_type;
extern const struct bus_type i2c_bus_type;
extern struct device_type i2c_adapter_type;
extern struct device_type i2c_client_type;

2
sound/soc/rockchip/rk3399_gru_sound.c
View File

@ -446,7 +446,7 @@ static const struct rockchip_sound_route rockchip_routes[] = {
struct dailink_match_data {
const char *compatible;
struct bus_type *bus_type;
const struct bus_type *bus_type;
};
static const struct dailink_match_data dailink_match[] = {