[PATCH] mtd: ubi: make ubi_class constant

[Ricardo B. Marliere]

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 ubi_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 at linuxfoundation.org>
Suggested-by: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
Signed-off-by: Ricardo B. Marliere <ricardo at marliere.net>
---
 drivers/mtd/ubi/build.c | 2 +-
 drivers/mtd/ubi/ubi.h   | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/mtd/ubi/build.c b/drivers/mtd/ubi/build.c
index 7d4ff1193db6..1938b61e1b74 100644
--- a/drivers/mtd/ubi/build.c
+++ b/drivers/mtd/ubi/build.c
@@ -111,7 +111,7 @@ static struct attribute *ubi_class_attrs[] = {
 ATTRIBUTE_GROUPS(ubi_class);
 
 /* Root UBI "class" object (corresponds to '/<sysfs>/class/ubi/') */
-struct class ubi_class = {
+const struct class ubi_class = {
 	.name		= UBI_NAME_STR,
 	.class_groups	= ubi_class_groups,
 };
diff --git a/drivers/mtd/ubi/ubi.h b/drivers/mtd/ubi/ubi.h
index 0b42bb45dd84..21c3208a9210 100644
--- a/drivers/mtd/ubi/ubi.h
+++ b/drivers/mtd/ubi/ubi.h
@@ -812,7 +812,7 @@ extern struct kmem_cache *ubi_wl_entry_slab;
 extern const struct file_operations ubi_ctrl_cdev_operations;
 extern const struct file_operations ubi_cdev_operations;
 extern const struct file_operations ubi_vol_cdev_operations;
-extern struct class ubi_class;
+extern const struct class ubi_class;
 extern struct mutex ubi_devices_mutex;
 extern struct blocking_notifier_head ubi_notifiers;
 

---
base-commit: 77bf032528393d2dc9430b3cea1fee8d0762a86f
change-id: 20240305-class_cleanup-mtd-b7dfe2ea8c26

Best regards,
-- 
Ricardo B. Marliere <ricardo at marliere.net>