From: Kunwu Chan <chentao@kylinos.cn>
Date: Fri, 23 Aug 2024 08:07:24 +0000 (+0800)
Subject: gpu: host1x: Make host1x_context_device_bus_type constant
X-Git-Tag: v6.13-rc1~122^2~23^2~145
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=3d70eb8e60c6d009c988c8e696cb68c77ff59628;p=thirdparty%2Fkernel%2Flinux.git

gpu: host1x: Make host1x_context_device_bus_type constant

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_context_device_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: Kunwu Chan <chentao@kylinos.cn>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240823080724.148423-1-kunwu.chan@linux.dev
---

diff --git a/drivers/gpu/host1x/context_bus.c b/drivers/gpu/host1x/context_bus.c
index d9421179d7b43..7cd0e1a5edd1b 100644
--- a/drivers/gpu/host1x/context_bus.c
+++ b/drivers/gpu/host1x/context_bus.c
@@ -6,7 +6,7 @@
 #include <linux/device.h>
 #include <linux/of.h>
 
-struct bus_type host1x_context_device_bus_type = {
+const struct bus_type host1x_context_device_bus_type = {
 	.name = "host1x-context",
 };
 EXPORT_SYMBOL_GPL(host1x_context_device_bus_type);
diff --git a/include/linux/host1x_context_bus.h b/include/linux/host1x_context_bus.h
index 72462737a6db3..c928cb4326803 100644
--- a/include/linux/host1x_context_bus.h
+++ b/include/linux/host1x_context_bus.h
@@ -9,7 +9,7 @@
 #include <linux/device.h>
 
 #ifdef CONFIG_TEGRA_HOST1X_CONTEXT_BUS
-extern struct bus_type host1x_context_device_bus_type;
+extern const struct bus_type host1x_context_device_bus_type;
 #endif
 
 #endif