linux-kernel - [PATCH] bus: mhi: host: make mhi_bus

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Message-ID: <20240823031129.49010-1-kunwu.chan@linux.dev>
Date: Fri, 23 Aug 2024 11:11:28 +0800
From: Kunwu Chan <kunwu.chan@...ux.dev>
To: manivannan.sadhasivam@...aro.org
Cc: gregkh@...uxfoundation.org,
	mhi@...ts.linux.dev,
	linux-arm-msm@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Kunwu Chan <chentao@...inos.cn>
Subject: [PATCH] bus: mhi: host: make mhi_bus_type const

From: Kunwu Chan <chentao@...inos.cn>

Now that the driver core can properly handle constant struct bus_type,
move the mhi_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@...uxfoundation.org>
Signed-off-by: Kunwu Chan <chentao@...inos.cn>
---
 drivers/bus/mhi/host/init.c     | 2 +-
 drivers/bus/mhi/host/internal.h | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/bus/mhi/host/init.c b/drivers/bus/mhi/host/init.c
index ce7d2e62c2f1..a9b1f8beee7b 100644
--- a/drivers/bus/mhi/host/init.c
+++ b/drivers/bus/mhi/host/init.c
@@ -1464,7 +1464,7 @@ static int mhi_match(struct device *dev, const struct device_driver *drv)
 	return 0;
 };
 
-struct bus_type mhi_bus_type = {
+const struct bus_type mhi_bus_type = {
 	.name = "mhi",
 	.dev_name = "mhi",
 	.match = mhi_match,
diff --git a/drivers/bus/mhi/host/internal.h b/drivers/bus/mhi/host/internal.h
index aaad40a07f69..d057e877932e 100644
--- a/drivers/bus/mhi/host/internal.h
+++ b/drivers/bus/mhi/host/internal.h
@@ -9,7 +9,7 @@
 
 #include "../common.h"
 
-extern struct bus_type mhi_bus_type;
+extern const struct bus_type mhi_bus_type;
 
 /* Host request register */
 #define MHI_SOC_RESET_REQ_OFFSET			0xb0
-- 
2.41.0