linux_ioctl_register_handler
linux_ioctl_register_handler(*lihp);
linux_ioctl_register_handler(*lihp);
int linux_ioctl_register_handler(struct linux_ioctl_handler *h);
linux_ioctl_register_handler, &n##_linux_handler); \
linux_ioctl_register_handler(&drm_handler);
linux_ioctl_register_handler(*lihp);