UBI: constify file operations

Signed-off-by: NJan Engelhardt <jengelh@medozas.de>
Signed-off-by: NArtem Bityutskiy <Artem.Bityutskiy@nokia.com>

drivers/mtd/ubi/cdev.c

@@ -1025,20 +1025,20 @@ static int ctrl_cdev_ioctl(struct inode *inode, struct file *file,
 }
 
 /* UBI control character device operations */
-struct file_operations ubi_ctrl_cdev_operations = {
+const struct file_operations ubi_ctrl_cdev_operations = {
 	.ioctl = ctrl_cdev_ioctl,
 	.owner = THIS_MODULE,
 };
 
 /* UBI character device operations */
-struct file_operations ubi_cdev_operations = {
+const struct file_operations ubi_cdev_operations = {
 	.owner = THIS_MODULE,
 	.ioctl = ubi_cdev_ioctl,
 	.llseek = no_llseek,
 };
 
 /* UBI volume character device operations */
-struct file_operations ubi_vol_cdev_operations = {
+const struct file_operations ubi_vol_cdev_operations = {
 	.owner   = THIS_MODULE,
 	.open    = vol_cdev_open,
 	.release = vol_cdev_release,

drivers/mtd/ubi/ubi.h

@@ -449,9 +449,9 @@ struct ubi_device {
 };
 
 extern struct kmem_cache *ubi_wl_entry_slab;
-extern struct file_operations ubi_ctrl_cdev_operations;
-extern struct file_operations ubi_cdev_operations;
-extern struct file_operations ubi_vol_cdev_operations;
+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 struct mutex ubi_devices_mutex;