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Subject[PATCH v2 2/5] powerpc: vio: make vio_bus_type const
Since commit d492cc2573a0 ("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.

Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ricardo B. Marliere <ricardo@marliere.net>
---
arch/powerpc/include/asm/vio.h | 2 +-
arch/powerpc/platforms/pseries/vio.c | 4 ++--
2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/powerpc/include/asm/vio.h b/arch/powerpc/include/asm/vio.h
index cc9b787627ad..6faf2a931755 100644
--- a/arch/powerpc/include/asm/vio.h
+++ b/arch/powerpc/include/asm/vio.h
@@ -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;

diff --git a/arch/powerpc/platforms/pseries/vio.c b/arch/powerpc/platforms/pseries/vio.c
index 6c58824190a2..90ff85c879bf 100644
--- a/arch/powerpc/platforms/pseries/vio.c
+++ b/arch/powerpc/platforms/pseries/vio.c
@@ -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,
--
2.43.0


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