mfd: core: 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 mfd_dev_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@linuxfoundation.org>
Signed-off-by: Ricardo B. Marliere <ricardo@marliere.net>
Link: https://lore.kernel.org/r/20240219-device_cleanup-mfd-v1-1-e4eef5ed2da8@marliere.net
Signed-off-by: Lee Jones <lee@kernel.org>

diff --git a/drivers/mfd/mfd-core.c b/drivers/mfd/mfd-core.c
index 2b85509a90fc299062c7522d6b5c1f04dd006f43..6ad5c93027afc66a9155612d8704b50beace1977 100644 (file)
--- a/drivers/mfd/mfd-core.c
+++ b/drivers/mfd/mfd-core.c
@@ -29,7 +29,7 @@ struct mfd_of_node_entry {
        struct device_node *np;
 };
 
-static struct device_type mfd_dev_type = {
+static const struct device_type mfd_dev_type = {
        .name   = "mfd_device",
 };