linux-kernel - [PATCH] pcmcia: cs: make pcmcia_socket

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Message-Id: <20240305-class_cleanup-brodo-v1-1-9bac7b015641@marliere.net>
Date: Tue, 05 Mar 2024 16:38:25 -0300
From: "Ricardo B. Marliere" <ricardo@...liere.net>
To: Dominik Brodowski <linux@...inikbrodowski.net>
Cc: linux-kernel@...r.kernel.org, 
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
 "Ricardo B. Marliere" <ricardo@...liere.net>
Subject: [PATCH] pcmcia: cs: make pcmcia_socket_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 pcmcia_socket_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/pcmcia/cs.c          | 2 +-
 drivers/pcmcia/cs_internal.h | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/pcmcia/cs.c b/drivers/pcmcia/cs.c
index b33be1e63c98..c75f55e1250a 100644
--- a/drivers/pcmcia/cs.c
+++ b/drivers/pcmcia/cs.c
@@ -892,7 +892,7 @@ static const struct dev_pm_ops pcmcia_socket_pm_ops = {

 #endif /* CONFIG_PM */

-struct class pcmcia_socket_class = {
+const struct class pcmcia_socket_class = {
 	.name = "pcmcia_socket",
 	.dev_uevent = pcmcia_socket_uevent,
 	.dev_release = pcmcia_release_socket,
diff --git a/drivers/pcmcia/cs_internal.h b/drivers/pcmcia/cs_internal.h
index 999332bc4378..02a83ca44e77 100644
--- a/drivers/pcmcia/cs_internal.h
+++ b/drivers/pcmcia/cs_internal.h
@@ -113,7 +113,7 @@ struct pcmcia_callback{
 /* cs.c */
 extern struct rw_semaphore pcmcia_socket_list_rwsem;
 extern struct list_head pcmcia_socket_list;
-extern struct class pcmcia_socket_class;
+extern const struct class pcmcia_socket_class;

 int pccard_register_pcmcia(struct pcmcia_socket *s, struct pcmcia_callback *c);
 struct pcmcia_socket *pcmcia_get_socket_by_nr(unsigned int nr);

---
base-commit: 1bec7691b32710ea27741f0f8b00c1dc98d92930
change-id: 20240305-class_cleanup-brodo-35f2a91982b0

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