#include <linux/kmod.h>
#include <linux/sem.h>
-#include <linux/devfs_fs_kernel.h>
#include <linux/mutex.h>
#define PHONE_NUM_DEVICES 256
}
-static struct file_operations phone_fops =
+static const struct file_operations phone_fops =
{
.owner = THIS_MODULE,
.open = phone_open,