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powerpc: vio: make vio_bus_type const

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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 vio_bus_type variable to be a constant
structure as well, placing it into read-only memory which can not be
modified at runtime.

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>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20240212-bus_cleanup-powerpc2-v2-2-8441b3f77827@marliere.net
This commit is contained in:
Ricardo B. Marliere 2024-02-12 17:05:00 -03:00 • committed by Michael Ellerman
parent e15d01277a
commit 565206aaa6
2 changed files with 3 additions and 3 deletions
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2
arch/powerpc/include/asm/vio.h
View file

@ -39,7 +39,7 @@
*/
#define VIO_CMO_MIN_ENT 1562624
extern struct bus_type vio_bus_type;
extern const struct bus_type vio_bus_type;
struct iommu_table;

4
arch/powerpc/platforms/pseries/vio.c
View file

@ -1615,7 +1615,7 @@ static struct attribute *vio_cmo_dev_attrs[] = {
};
ATTRIBUTE_GROUPS(vio_cmo_dev);
struct bus_type vio_bus_type = {
const struct bus_type vio_bus_type = {
.name = "vio",
.dev_groups = vio_cmo_dev_groups,
.bus_groups = vio_bus_groups,
@ -1634,7 +1634,7 @@ static struct attribute *vio_dev_attrs[] = {
};
ATTRIBUTE_GROUPS(vio_dev);
struct bus_type vio_bus_type = {
const struct bus_type vio_bus_type = {
.name = "vio",
.dev_groups = vio_dev_groups,
.uevent = vio_hotplug,