Commit 24e041e1 authored by Kunwu Chan's avatar Kunwu Chan Committed by Greg Kroah-Hartman
Browse files

platform: Make platform_bus_type constant 



Since commit d492cc25 ("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: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: default avatarKunwu Chan <chentao@kylinos.cn>
Link: https://lore.kernel.org/r/20240823075544.144426-1-kunwu.chan@linux.dev


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent a169a663

drivers/base/platform.c

+1 −1
Original line number Diff line number Diff line
@@ -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,

include/linux/platform_device.h

+1 −1
Original line number Diff line number Diff line
@@ -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 *,