linux-kernel - [PATCH] rapidio: make rio_mport

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Message-Id: <20240305-rapidio-v1-1-0c036139704f@marliere.net>
Date: Tue, 05 Mar 2024 17:15:04 -0300
From: "Ricardo B. Marliere" <ricardo@...liere.net>
To: Matt Porter <mporter@...nel.crashing.org>, 
 Alexandre Bounine <alex.bou9@...il.com>
Cc: linux-kernel@...r.kernel.org, 
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
 "Ricardo B. Marliere" <ricardo@...liere.net>
Subject: [PATCH] rapidio: make rio_mport_class constant

Since commit 43a7206b0963 ("driver core: class: make class_register() take
a const *"), the driver core allows for struct class to be in read-only
memory, so move the rio_mport_class structure to be declared at build time
placing it into read-only memory, instead of having to be dynamically
allocated at boot time.

Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Suggested-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Ricardo B. Marliere <ricardo@...liere.net>
---
 drivers/rapidio/rio-driver.c | 2 +-
 include/linux/rio.h          | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/rapidio/rio-driver.c b/drivers/rapidio/rio-driver.c
index 1b3b4c2e015d..9aacb5edf6b3 100644
--- a/drivers/rapidio/rio-driver.c
+++ b/drivers/rapidio/rio-driver.c
@@ -221,7 +221,7 @@ static int rio_uevent(const struct device *dev, struct kobj_uevent_env *env)
 	return 0;
 }

-struct class rio_mport_class = {
+const struct class rio_mport_class = {
 	.name		= "rapidio_port",
 	.dev_groups	= rio_mport_groups,
 };
diff --git a/include/linux/rio.h b/include/linux/rio.h
index 2cd637268b4f..55cebdddabfe 100644
--- a/include/linux/rio.h
+++ b/include/linux/rio.h
@@ -79,7 +79,7 @@
 #define RIO_CTAG_UDEVID	0x0001ffff /* Unique device identifier */

 extern struct bus_type rio_bus_type;
-extern struct class rio_mport_class;
+extern const struct class rio_mport_class;

 struct rio_mport;
 struct rio_dev;

---
base-commit: 90d35da658da8cff0d4ecbb5113f5fac9d00eb72
change-id: 20240305-rapidio-fc61b2014cff

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