tty: remove file from n_tty_ioctl_helper

After the previous patch, there are no users of 'file' in
n_tty_ioctl_helper. So remove it also from there.

Cc: Marcel Holtmann <[e-mail]>
Cc: Johan Hedberg <[e-mail]>
Cc: Luiz Augusto von Dentz <[e-mail]>
Cc: Paul Mackerras <[e-mail]>
Cc: "David S. Miller" <[e-mail]>
Cc: Jakub Kicinski <[e-mail]>
Cc: Krzysztof Kozlowski <[e-mail]>
Acked-by: Krzysztof Kozlowski <[e-mail]>
Signed-off-by: Jiri Slaby <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/bluetooth/hci_ldisc.c

···
 		break;
 
 	default:
-		err = n_tty_ioctl_helper(tty, file, cmd, arg);
+		err = n_tty_ioctl_helper(tty, cmd, arg);
 		break;
 	}
 

drivers/net/ppp/ppp_async.c

···
 		/* flush our buffers and the serial port's buffer */
 		if (arg == TCIOFLUSH || arg == TCOFLUSH)
 			ppp_async_flush_output(ap);
-		err = n_tty_ioctl_helper(tty, file, cmd, arg);
+		err = n_tty_ioctl_helper(tty, cmd, arg);
 		break;
 
 	case FIONREAD:

drivers/net/ppp/ppp_synctty.c

···
 		/* flush our buffers and the serial port's buffer */
 		if (arg == TCIOFLUSH || arg == TCOFLUSH)
 			ppp_sync_flush_output(ap);
-		err = n_tty_ioctl_helper(tty, file, cmd, arg);
+		err = n_tty_ioctl_helper(tty, cmd, arg);
 		break;
 
 	case FIONREAD:

drivers/tty/n_gsm.c

···
 		base = mux_num_to_base(gsm);
 		return put_user(base + 1, (__u32 __user *)arg);
 	default:
-		return n_tty_ioctl_helper(tty, file, cmd, arg);
+		return n_tty_ioctl_helper(tty, cmd, arg);
 	}
 }
 

drivers/tty/n_hdlc.c

···
 		fallthrough;	/* to default */
 
 	default:
-		error = n_tty_ioctl_helper(tty, file, cmd, arg);
+		error = n_tty_ioctl_helper(tty, cmd, arg);
 		break;
 	}
 	return error;

drivers/tty/n_tty.c

···
 		up_write(&tty->termios_rwsem);
 		return put_user(retval, (unsigned int __user *) arg);
 	default:
-		return n_tty_ioctl_helper(tty, file, cmd, arg);
+		return n_tty_ioctl_helper(tty, cmd, arg);
 	}
 }
 

drivers/tty/tty_ioctl.c

···
 }
 EXPORT_SYMBOL_GPL(tty_perform_flush);
 
-int n_tty_ioctl_helper(struct tty_struct *tty, struct file *file,
-		       unsigned int cmd, unsigned long arg)
+int n_tty_ioctl_helper(struct tty_struct *tty, unsigned int cmd,
+		unsigned long arg)
 {
 	int retval;
 

include/linux/tty.h

···
 #endif
 
 /* tty_ioctl.c */
-int n_tty_ioctl_helper(struct tty_struct *tty, struct file *file,
-		unsigned int cmd, unsigned long arg);
+int n_tty_ioctl_helper(struct tty_struct *tty, unsigned int cmd,
+		unsigned long arg);
 
 /* vt.c */
 

net/nfc/nci/uart.c

···
 			return -EBUSY;
 		break;
 	default:
-		err = n_tty_ioctl_helper(tty, file, cmd, arg);
+		err = n_tty_ioctl_helper(tty, cmd, arg);
 		break;
 	}