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platform: Make platform_bus_type constant

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Since commit d492cc2573 ("driver core: device.h: make struct
bus_type a const *"), the driver core can properly handle constant
struct bus_type, move the platform_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: Kunwu Chan <chentao@kylinos.cn>
Link: https://lore.kernel.org/r/20240823075544.144426-1-kunwu.chan@linux.dev
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Kunwu Chan 2024-08-23 15:55:44 +08:00 committed by Greg Kroah-Hartman
parent a169a663bf
commit 24e041e1e4
2 changed files with 2 additions and 2 deletions
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2
drivers/base/platform.c
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@ -1474,7 +1474,7 @@ static const struct dev_pm_ops platform_dev_pm_ops = {
USE_PLATFORM_PM_SLEEP_OPS
};
struct bus_type platform_bus_type = {
const struct bus_type platform_bus_type = {
.name = "platform",
.dev_groups = platform_dev_groups,
.match = platform_match,

2
include/linux/platform_device.h
View File

@ -52,7 +52,7 @@ struct platform_device {
extern int platform_device_register(struct platform_device *);
extern void platform_device_unregister(struct platform_device *);
extern struct bus_type platform_bus_type;
extern const struct bus_type platform_bus_type;
extern struct device platform_bus;
extern struct resource *platform_get_resource(struct platform_device *,