tty: remove file from tty_ldisc_ops::ioctl and compat_ioctl

After the previous patches, noone needs 'file' parameter in neither
ioctl hook from tty_ldisc_ops. So remove 'file' from both of them.

Cc: Marcel Holtmann <[e-mail]>
Cc: Johan Hedberg <[e-mail]>
Cc: Luiz Augusto von Dentz <[e-mail]>
Cc: Wolfgang Grandegger <[e-mail]>
Cc: Marc Kleine-Budde <[e-mail]>
Cc: "David S. Miller" <[e-mail]>
Cc: Jakub Kicinski <[e-mail]>
Cc: Andreas Koensgen <[e-mail]>
Cc: Paul Mackerras <[e-mail]>
Acked-by: Krzysztof Kozlowski <[e-mail]> [NFC]
Acked-by: Dmitry Torokhov <[e-mail]>
Acked-by: Marc Kleine-Budde <[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

···
  * Arguments:
  *
  *    tty        pointer to tty instance data
- *    file       pointer to open file object for device
  *    cmd        IOCTL command code
  *    arg        argument for IOCTL call (cmd dependent)
  *
  * Return Value:    Command dependent
  */
-static int hci_uart_tty_ioctl(struct tty_struct *tty, struct file *file,
-			      unsigned int cmd, unsigned long arg)
+static int hci_uart_tty_ioctl(struct tty_struct *tty, unsigned int cmd,
+			      unsigned long arg)
 {
 	struct hci_uart *hu = tty->disc_data;
 	int err = 0;

drivers/input/serio/serport.c

···
  * serport_ldisc_ioctl() allows to set the port protocol, and device ID
  */
 
-static int serport_ldisc_ioctl(struct tty_struct *tty, struct file *file,
-			       unsigned int cmd, unsigned long arg)
+static int serport_ldisc_ioctl(struct tty_struct *tty, unsigned int cmd,
+			       unsigned long arg)
 {
 	if (cmd == SPIOCSTYPE) {
 		unsigned long type;
···
 #ifdef CONFIG_COMPAT
 #define COMPAT_SPIOCSTYPE	_IOW('q', 0x01, compat_ulong_t)
 static int serport_ldisc_compat_ioctl(struct tty_struct *tty,
-				       struct file *file,
 				       unsigned int cmd, unsigned long arg)
 {
 	if (cmd == COMPAT_SPIOCSTYPE) {

drivers/net/can/slcan.c

···
 }
 
 /* Perform I/O control on an active SLCAN channel. */
-static int slcan_ioctl(struct tty_struct *tty, struct file *file,
-		       unsigned int cmd, unsigned long arg)
+static int slcan_ioctl(struct tty_struct *tty, unsigned int cmd,
+		       unsigned long arg)
 {
 	struct slcan *sl = (struct slcan *) tty->disc_data;
 	unsigned int tmp;

drivers/net/hamradio/6pack.c

···
 }
 
 /* Perform I/O control on an active 6pack channel. */
-static int sixpack_ioctl(struct tty_struct *tty, struct file *file,
-	unsigned int cmd, unsigned long arg)
+static int sixpack_ioctl(struct tty_struct *tty, unsigned int cmd,
+		unsigned long arg)
 {
 	struct sixpack *sp = sp_get(tty);
 	struct net_device *dev;

drivers/net/hamradio/mkiss.c

···
 }
 
 /* Perform I/O control on an active ax25 channel. */
-static int mkiss_ioctl(struct tty_struct *tty, struct file *file,
-	unsigned int cmd, unsigned long arg)
+static int mkiss_ioctl(struct tty_struct *tty, unsigned int cmd,
+		unsigned long arg)
 {
 	struct mkiss *ax = mkiss_get(tty);
 	struct net_device *dev;

drivers/net/ppp/ppp_async.c

···
  */
 
 static int
-ppp_asynctty_ioctl(struct tty_struct *tty, struct file *file,
-		   unsigned int cmd, unsigned long arg)
+ppp_asynctty_ioctl(struct tty_struct *tty, unsigned int cmd, unsigned long arg)
 {
 	struct asyncppp *ap = ap_get(tty);
 	int err, val;

drivers/net/ppp/ppp_synctty.c

···
 }
 
 static int
-ppp_synctty_ioctl(struct tty_struct *tty, struct file *file,
-		  unsigned int cmd, unsigned long arg)
+ppp_synctty_ioctl(struct tty_struct *tty, unsigned int cmd, unsigned long arg)
 {
 	struct syncppp *ap = sp_get(tty);
 	int __user *p = (int __user *)arg;

drivers/net/slip/slip.c

···
 #endif /* CONFIG_SLIP_MODE_SLIP6 */
 
 /* Perform I/O control on an active SLIP channel. */
-static int slip_ioctl(struct tty_struct *tty, struct file *file,
-					unsigned int cmd, unsigned long arg)
+static int slip_ioctl(struct tty_struct *tty, unsigned int cmd,
+		unsigned long arg)
 {
 	struct slip *sl = tty->disc_data;
 	unsigned int tmp;

drivers/tty/n_gsm.c

···
 	return mask;
 }
 
-static int gsmld_ioctl(struct tty_struct *tty, struct file *file,
-		       unsigned int cmd, unsigned long arg)
+static int gsmld_ioctl(struct tty_struct *tty, unsigned int cmd,
+		       unsigned long arg)
 {
 	struct gsm_config c;
 	struct gsm_mux *gsm = tty->disc_data;

drivers/tty/n_hdlc.c

···
 /**
  * n_hdlc_tty_ioctl - process IOCTL system call for the tty device.
  * @tty: pointer to tty instance data
- * @file: pointer to open file object for device
  * @cmd: IOCTL command code
  * @arg: argument for IOCTL call (cmd dependent)
  *
  * Returns command dependent result.
  */
-static int n_hdlc_tty_ioctl(struct tty_struct *tty, struct file *file,
-			    unsigned int cmd, unsigned long arg)
+static int n_hdlc_tty_ioctl(struct tty_struct *tty, unsigned int cmd,
+			    unsigned long arg)
 {
 	struct n_hdlc *n_hdlc = tty->disc_data;
 	int error = 0;

drivers/tty/n_tty.c

···
 	return nr;
 }
 
-static int n_tty_ioctl(struct tty_struct *tty, struct file *file,
-		       unsigned int cmd, unsigned long arg)
+static int n_tty_ioctl(struct tty_struct *tty, unsigned int cmd,
+		       unsigned long arg)
 {
 	struct n_tty_data *ldata = tty->disc_data;
 	int retval;

drivers/tty/tty_io.c

···
 		return hung_up_tty_ioctl(file, cmd, arg);
 	retval = -EINVAL;
 	if (ld->ops->ioctl) {
-		retval = ld->ops->ioctl(tty, file, cmd, arg);
+		retval = ld->ops->ioctl(tty, cmd, arg);
 		if (retval == -ENOIOCTLCMD)
 			retval = -ENOTTY;
 	}
···
 	if (!ld)
 		return hung_up_tty_compat_ioctl(file, cmd, arg);
 	if (ld->ops->compat_ioctl)
-		retval = ld->ops->compat_ioctl(tty, file, cmd, arg);
+		retval = ld->ops->compat_ioctl(tty, cmd, arg);
 	if (retval == -ENOIOCTLCMD && ld->ops->ioctl)
-		retval = ld->ops->ioctl(tty, file,
-				(unsigned long)compat_ptr(cmd), arg);
+		retval = ld->ops->ioctl(tty, (unsigned long)compat_ptr(cmd),
+				arg);
 	tty_ldisc_deref(ld);
 
 	return retval;

include/linux/tty_ldisc.h

···
  *	some processing on the characters first.  If this function is
  *	not defined, the user will receive an EIO error.
  *
- * int	(*ioctl)(struct tty_struct * tty, struct file * file,
- *		 unsigned int cmd, unsigned long arg);
+ * int	(*ioctl)(struct tty_struct *tty, unsigned int cmd, unsigned long arg);
  *
  *	This function is called when the user requests an ioctl which
  *	is not handled by the tty layer or the low-level tty driver.
···
  *	low-level driver can "grab" an ioctl request before the line
  *	discpline has a chance to see it.
  *
- * int	(*compat_ioctl)(struct tty_struct * tty, struct file * file,
- *		        unsigned int cmd, unsigned long arg);
+ * int	(*compat_ioctl)(struct tty_struct *tty, unsigned int cmd,
+ *			unsigned long arg);
  *
  *	Process ioctl calls from 32-bit process on 64-bit system
  *
···
 			void **cookie, unsigned long offset);
 	ssize_t	(*write)(struct tty_struct *tty, struct file *file,
 			 const unsigned char *buf, size_t nr);
-	int	(*ioctl)(struct tty_struct *tty, struct file *file,
-			 unsigned int cmd, unsigned long arg);
-	int	(*compat_ioctl)(struct tty_struct *tty, struct file *file,
-				unsigned int cmd, unsigned long arg);
+	int	(*ioctl)(struct tty_struct *tty, unsigned int cmd,
+			unsigned long arg);
+	int	(*compat_ioctl)(struct tty_struct *tty, unsigned int cmd,
+			unsigned long arg);
 	void	(*set_termios)(struct tty_struct *tty, struct ktermios *old);
 	__poll_t (*poll)(struct tty_struct *, struct file *,
 			     struct poll_table_struct *);

net/nfc/nci/uart.c

···
  * Arguments:
  *
  *    tty        pointer to tty instance data
- *    file       pointer to open file object for device
  *    cmd        IOCTL command code
  *    arg        argument for IOCTL call (cmd dependent)
  *
  * Return Value:    Command dependent
  */
-static int nci_uart_tty_ioctl(struct tty_struct *tty, struct file *file,
-			      unsigned int cmd, unsigned long arg)
+static int nci_uart_tty_ioctl(struct tty_struct *tty, unsigned int cmd,
+			      unsigned long arg)
 {
 	struct nci_uart *nu = (void *)tty->disc_data;
 	int err = 0;