struct file_operations proc_fops = {
    .owner  = THIS_MODULE,
    .read   = proc_read,
    .write  = proc_write,
};

int proc_create(void)
{
    struct proc_dir_entry *proc_entry = proc_create("my_proc",
                                                    0666,
                                                    NULL,
                                                    &proc_fops);
    if (!proc_entry) {
      printk(KERN_ERR "proc filesystem can't be created");
      return -ENOMEM;
    }

    return 0;
}