diff mbox series

[2/4] powerpc: vio: make vio_bus_type const

Message ID 20240209-bus_cleanup-powerpc2-v1-2-79a56dcaebb1@marliere.net
State New
Headers
Series powerpc: struct bus_type cleanup |

Commit Message

Ricardo B. Marliere Feb. 10, 2024, 12:07 a.m. UTC 
  Now that 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 mbox series

Patch

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,