linux-kernel - [PATCH] mcb: constify the struct device

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Date: Mon, 19 Feb 2024 16:52:00 -0300
From: "Ricardo B. Marliere" <ricardo@...liere.net>
To: Johannes Thumshirn <morbidrsa@...il.com>
Cc: linux-kernel@...r.kernel.org, 
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
 "Ricardo B. Marliere" <ricardo@...liere.net>
Subject: [PATCH] mcb: constify the struct device_type usage

Since commit aed65af1cc2f ("drivers: make device_type const"), the driver
core can properly handle constant struct device_type. Move the
mcb_carrier_device_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@...uxfoundation.org>
Signed-off-by: Ricardo B. Marliere <ricardo@...liere.net>
---
 drivers/mcb/mcb-core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mcb/mcb-core.c b/drivers/mcb/mcb-core.c
index 61994da7bad0..8c4f1a1e3768 100644
--- a/drivers/mcb/mcb-core.c
+++ b/drivers/mcb/mcb-core.c
@@ -165,7 +165,7 @@ static struct bus_type mcb_bus_type = {
 	.shutdown = mcb_shutdown,
 };

-static struct device_type mcb_carrier_device_type = {
+static const struct device_type mcb_carrier_device_type = {
 	.name = "mcb-carrier",
 	.groups = mcb_carrier_groups,
 };

---
base-commit: b401b621758e46812da61fa58a67c3fd8d91de0d
change-id: 20240219-device_cleanup-mcb-31a910240a2b

Best regards,
-- 
Ricardo B. Marliere <ricardo@...liere.net>