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ARM: 9416/1: amba: make amba_bustype 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 amba_bustype 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>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
This commit is contained in:
Kunwu Chan 2024-09-02 07:43:23 +01:00 committed by Russell King (Oracle)
parent de9c2c66ad
commit a4d398a573
2 changed files with 2 additions and 2 deletions
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2
drivers/amba/bus.c
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@ -435,7 +435,7 @@ static const struct dev_pm_ops amba_pm = {
* DMA configuration for platform and AMBA bus is same. So here we reuse * DMA configuration for platform and AMBA bus is same. So here we reuse
* platform's DMA config routine. * platform's DMA config routine.
*/ */
struct bus_type amba_bustype = { const struct bus_type amba_bustype = {
.name = "amba", .name = "amba",
.dev_groups = amba_dev_groups, .dev_groups = amba_dev_groups,
.match = amba_match, .match = amba_match,

2
include/linux/amba/bus.h
View File

@ -105,7 +105,7 @@ enum amba_vendor {
AMBA_VENDOR_LSI = 0xb6, AMBA_VENDOR_LSI = 0xb6,
}; };
extern struct bus_type amba_bustype; extern const struct bus_type amba_bustype;
#define to_amba_device(d) container_of_const(d, struct amba_device, dev) #define to_amba_device(d) container_of_const(d, struct amba_device, dev)