Now passes checkpatch

ioctl_chardev/my-ioctl.c

@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-2.0
+
 #include <linux/device.h>
 #include "my-ioctl.h"
 
@@ -14,7 +16,7 @@ static struct class *cls;
 static long my_ioctl(struct file *filp, unsigned int cmd, unsigned long arg);
 
 /* See: https://elixir.bootlin.com/linux/v6.14.5/source/include/linux/fs.h#L2131 */
-static struct file_operations fops = {
+static const struct file_operations fops = {
 	.owner = THIS_MODULE,
 	.unlocked_ioctl = my_ioctl,
 };

ioctl_chardev/my-ioctl.h

@@ -1,3 +1,5 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
 #ifndef MY_IOCTL_H
 #define MY_IOCTL_H
 #include <linux/ioctl.h>

ioctl_chardev/test.c

@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-2.0
+
 #include <stdio.h>
 // #include <stdlib.h>
 #include <unistd.h>