gpu: host1x: bus: make host1x_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 host1x_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>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240213-bus_cleanup-host1x-v1-1-54ec51b5d14f@marliere.net

diff --git a/drivers/gpu/host1x/bus.c b/drivers/gpu/host1x/bus.c
index 84d042796d2e66ffb8c5dce5dd5485b680c7b8e1..783975d1384fc4d8e780cb2cdf450b5bab8b55de 100644 (file)
--- a/drivers/gpu/host1x/bus.c
+++ b/drivers/gpu/host1x/bus.c
@@ -365,7 +365,7 @@ static const struct dev_pm_ops host1x_device_pm_ops = {
        .restore = pm_generic_restore,
 };
 
-struct bus_type host1x_bus_type = {
+const struct bus_type host1x_bus_type = {
        .name = "host1x",
        .match = host1x_device_match,
        .uevent = host1x_device_uevent,

diff --git a/drivers/gpu/host1x/bus.h b/drivers/gpu/host1x/bus.h
index a4adf9abc3b4146f6181f3be9e0e9dfbba8b3fc8..a80ceadfeb34bfa7a1bd366bdf9fd27db0b617a3 100644 (file)
--- a/drivers/gpu/host1x/bus.h
+++ b/drivers/gpu/host1x/bus.h
@@ -10,7 +10,7 @@
 struct bus_type;
 struct host1x;
 
-extern struct bus_type host1x_bus_type;
+extern const struct bus_type host1x_bus_type;
 
 int host1x_register(struct host1x *host1x);
 int host1x_unregister(struct host1x *host1x);