diff --git a/arch/alpha/kernel/srmcons.c b/arch/alpha/kernel/srmcons.c
index 9d7dff2..7569232 100644
--- a/arch/alpha/kernel/srmcons.c
+++ b/arch/alpha/kernel/srmcons.c
@@ -229,7 +229,7 @@
 
 static struct tty_driver *srmcons_driver;
 
-static struct tty_operations srmcons_ops = {
+static const struct tty_operations srmcons_ops = {
 	.open		= srmcons_open,
 	.close		= srmcons_close,
 	.write		= srmcons_write,
diff --git a/arch/ia64/hp/sim/simserial.c b/arch/ia64/hp/sim/simserial.c
index 0daacc2..246eb3d 100644
--- a/arch/ia64/hp/sim/simserial.c
+++ b/arch/ia64/hp/sim/simserial.c
@@ -940,7 +940,7 @@
 	printk(KERN_INFO " no serial options enabled\n");
 }
 
-static struct tty_operations hp_ops = {
+static const struct tty_operations hp_ops = {
 	.open = rs_open,
 	.close = rs_close,
 	.write = rs_write,
diff --git a/arch/ppc/4xx_io/serial_sicc.c b/arch/ppc/4xx_io/serial_sicc.c
index b81a367..87fe9a8 100644
--- a/arch/ppc/4xx_io/serial_sicc.c
+++ b/arch/ppc/4xx_io/serial_sicc.c
@@ -1720,7 +1720,7 @@
     return 0;
 }
 
-static struct tty_operations sicc_ops = {
+static const struct tty_operations sicc_ops = {
 	.open = siccuart_open,
 	.close = siccuart_close,
 	.write = siccuart_write,
diff --git a/arch/um/drivers/line.c b/arch/um/drivers/line.c
index 563ce76..24747a4 100644
--- a/arch/um/drivers/line.c
+++ b/arch/um/drivers/line.c
@@ -642,9 +642,9 @@
 }
 
 struct tty_driver *line_register_devfs(struct lines *set,
-			 struct line_driver *line_driver,
-			 struct tty_operations *ops, struct line *lines,
-			 int nlines)
+				       struct line_driver *line_driver,
+				       const struct tty_operations *ops,
+				       struct line *lines, int nlines)
 {
 	int i;
 	struct tty_driver *driver = alloc_tty_driver(nlines);
diff --git a/arch/um/include/line.h b/arch/um/include/line.h
index 642c9a0..7be2481 100644
--- a/arch/um/include/line.h
+++ b/arch/um/include/line.h
@@ -91,10 +91,9 @@
 			  void *data);
 extern void line_close_chan(struct line *line);
 extern struct tty_driver * line_register_devfs(struct lines *set,
-				struct line_driver *line_driver,
-				struct tty_operations *driver,
-				struct line *lines,
-				int nlines);
+					       struct line_driver *line_driver,
+					       const struct tty_operations *driver,
+					       struct line *lines, int nlines);
 extern void lines_init(struct line *lines, int nlines, struct chan_opts *opts);
 extern void close_lines(struct line *lines, int nlines);
 
diff --git a/arch/v850/kernel/memcons.c b/arch/v850/kernel/memcons.c
index 815f8a4..92f514f 100644
--- a/arch/v850/kernel/memcons.c
+++ b/arch/v850/kernel/memcons.c
@@ -104,7 +104,7 @@
 	return 0;
 }
 
-static struct tty_operations ops = {
+static const struct tty_operations ops = {
 	.open = memcons_tty_open,
 	.write = memcons_tty_write,
 	.write_room = memcons_tty_write_room,
diff --git a/arch/v850/kernel/simcons.c b/arch/v850/kernel/simcons.c
index 3975aa0..9973596 100644
--- a/arch/v850/kernel/simcons.c
+++ b/arch/v850/kernel/simcons.c
@@ -77,7 +77,7 @@
 	return 0;
 }
 
-static struct tty_operations ops = {
+static const struct tty_operations ops = {
 	.open = simcons_tty_open,
 	.write = simcons_tty_write,
 	.write_room = simcons_tty_write_room,
diff --git a/arch/xtensa/platform-iss/console.c b/arch/xtensa/platform-iss/console.c
index 22d3c57..5c947ca 100644
--- a/arch/xtensa/platform-iss/console.c
+++ b/arch/xtensa/platform-iss/console.c
@@ -191,7 +191,7 @@
 }
 
 
-static struct tty_operations serial_ops = {
+static const struct tty_operations serial_ops = {
 	.open = rs_open,
 	.close = rs_close,
 	.write = rs_write,
diff --git a/drivers/char/amiserial.c b/drivers/char/amiserial.c
index 9d6713a..d0e92ed 100644
--- a/drivers/char/amiserial.c
+++ b/drivers/char/amiserial.c
@@ -1958,7 +1958,7 @@
 }
 
 
-static struct tty_operations serial_ops = {
+static const struct tty_operations serial_ops = {
 	.open = rs_open,
 	.close = rs_close,
 	.write = rs_write,
diff --git a/drivers/char/cyclades.c b/drivers/char/cyclades.c
index c1c6728..f85b4eb 100644
--- a/drivers/char/cyclades.c
+++ b/drivers/char/cyclades.c
@@ -5205,7 +5205,7 @@
     extra ports are ignored.
  */
 
-static struct tty_operations cy_ops = {
+static const struct tty_operations cy_ops = {
     .open = cy_open,
     .close = cy_close,
     .write = cy_write,
diff --git a/drivers/char/epca.c b/drivers/char/epca.c
index 86d290e..3baa2ab 100644
--- a/drivers/char/epca.c
+++ b/drivers/char/epca.c
@@ -1125,7 +1125,7 @@
 
 module_exit(epca_module_exit);
 
-static struct tty_operations pc_ops = {
+static const struct tty_operations pc_ops = {
 	.open = pc_open,
 	.close = pc_close,
 	.write = pc_write,
diff --git a/drivers/char/esp.c b/drivers/char/esp.c
index afcd83d..05788c7 100644
--- a/drivers/char/esp.c
+++ b/drivers/char/esp.c
@@ -2376,7 +2376,7 @@
 	return (port_detected);
 }
 
-static struct tty_operations esp_ops = {
+static const struct tty_operations esp_ops = {
 	.open = esp_open,
 	.close = rs_close,
 	.write = rs_write,
diff --git a/drivers/char/hvc_console.c b/drivers/char/hvc_console.c
index a76d2c4..4053d1c 100644
--- a/drivers/char/hvc_console.c
+++ b/drivers/char/hvc_console.c
@@ -696,7 +696,7 @@
 	return 0;
 }
 
-static struct tty_operations hvc_ops = {
+static const struct tty_operations hvc_ops = {
 	.open = hvc_open,
 	.close = hvc_close,
 	.write = hvc_write,
diff --git a/drivers/char/hvcs.c b/drivers/char/hvcs.c
index 4589ff3..0b89bcd 100644
--- a/drivers/char/hvcs.c
+++ b/drivers/char/hvcs.c
@@ -1306,7 +1306,7 @@
 	return hvcsd->chars_in_buffer;
 }
 
-static struct tty_operations hvcs_ops = {
+static const struct tty_operations hvcs_ops = {
 	.open = hvcs_open,
 	.close = hvcs_close,
 	.hangup = hvcs_hangup,
diff --git a/drivers/char/hvsi.c b/drivers/char/hvsi.c
index a89a95f..c07dc58 100644
--- a/drivers/char/hvsi.c
+++ b/drivers/char/hvsi.c
@@ -1130,7 +1130,7 @@
 }
 
 
-static struct tty_operations hvsi_ops = {
+static const struct tty_operations hvsi_ops = {
 	.open = hvsi_open,
 	.close = hvsi_close,
 	.write = hvsi_write,
diff --git a/drivers/char/ip2/ip2main.c b/drivers/char/ip2/ip2main.c
index 331f447..4828bc9 100644
--- a/drivers/char/ip2/ip2main.c
+++ b/drivers/char/ip2/ip2main.c
@@ -458,7 +458,7 @@
 }
 #endif /* MODULE */
 
-static struct tty_operations ip2_ops = {
+static const struct tty_operations ip2_ops = {
 	.open            = ip2_open,
 	.close           = ip2_close,
 	.write           = ip2_write,
diff --git a/drivers/char/isicom.c b/drivers/char/isicom.c
index 2e1da63..ea2bbf8 100644
--- a/drivers/char/isicom.c
+++ b/drivers/char/isicom.c
@@ -1550,7 +1550,7 @@
 	board->base = 0;
 }
 
-static struct tty_operations isicom_ops = {
+static const struct tty_operations isicom_ops = {
 	.open			= isicom_open,
 	.close			= isicom_close,
 	.write			= isicom_write,
diff --git a/drivers/char/istallion.c b/drivers/char/istallion.c
index 6b4d82a..d6e0315 100644
--- a/drivers/char/istallion.c
+++ b/drivers/char/istallion.c
@@ -4636,7 +4636,7 @@
 	return rc;
 }
 
-static struct tty_operations stli_ops = {
+static const struct tty_operations stli_ops = {
 	.open = stli_open,
 	.close = stli_close,
 	.write = stli_write,
diff --git a/drivers/char/moxa.c b/drivers/char/moxa.c
index c1a6d3c..b401383 100644
--- a/drivers/char/moxa.c
+++ b/drivers/char/moxa.c
@@ -281,7 +281,7 @@
 static int moxa_set_serial_info(struct moxa_str *, struct serial_struct __user *);
 static void MoxaSetFifo(int port, int enable);
 
-static struct tty_operations moxa_ops = {
+static const struct tty_operations moxa_ops = {
 	.open = moxa_open,
 	.close = moxa_close,
 	.write = moxa_write,
diff --git a/drivers/char/mxser.c b/drivers/char/mxser.c
index 27a6537..8253fca 100644
--- a/drivers/char/mxser.c
+++ b/drivers/char/mxser.c
@@ -453,7 +453,7 @@
 
 /* above is modified by Victor Yu. 08-15-2002 */
 
-static struct tty_operations mxser_ops = {
+static const struct tty_operations mxser_ops = {
 	.open = mxser_open,
 	.close = mxser_close,
 	.write = mxser_write,
diff --git a/drivers/char/pcmcia/synclink_cs.c b/drivers/char/pcmcia/synclink_cs.c
index 00f574c..dd845cb 100644
--- a/drivers/char/pcmcia/synclink_cs.c
+++ b/drivers/char/pcmcia/synclink_cs.c
@@ -3010,7 +3010,7 @@
 	.resume		= mgslpc_resume,
 };
 
-static struct tty_operations mgslpc_ops = {
+static const struct tty_operations mgslpc_ops = {
 	.open = mgslpc_open,
 	.close = mgslpc_close,
 	.write = mgslpc_write,
diff --git a/drivers/char/pty.c b/drivers/char/pty.c
index 34dd4c3..80d3eed 100644
--- a/drivers/char/pty.c
+++ b/drivers/char/pty.c
@@ -224,7 +224,7 @@
         tty->termios->c_cflag |= (CS8 | CREAD);
 }
 
-static struct tty_operations pty_ops = {
+static const struct tty_operations pty_ops = {
 	.open = pty_open,
 	.close = pty_close,
 	.write = pty_write,
diff --git a/drivers/char/rio/rio_linux.c b/drivers/char/rio/rio_linux.c
index 3fa80aa..202a3b0 100644
--- a/drivers/char/rio/rio_linux.c
+++ b/drivers/char/rio/rio_linux.c
@@ -727,7 +727,7 @@
 	return &vpdp;
 }
 
-static struct tty_operations rio_ops = {
+static const struct tty_operations rio_ops = {
 	.open = riotopen,
 	.close = gs_close,
 	.write = gs_write,
diff --git a/drivers/char/riscom8.c b/drivers/char/riscom8.c
index 06b9f78..214d850 100644
--- a/drivers/char/riscom8.c
+++ b/drivers/char/riscom8.c
@@ -1583,7 +1583,7 @@
 	}
 }
 
-static struct tty_operations riscom_ops = {
+static const struct tty_operations riscom_ops = {
 	.open  = rc_open,
 	.close = rc_close,
 	.write = rc_write,
diff --git a/drivers/char/rocket.c b/drivers/char/rocket.c
index 0ac1318..bac8005 100644
--- a/drivers/char/rocket.c
+++ b/drivers/char/rocket.c
@@ -2334,7 +2334,7 @@
 	return (1);
 }
 
-static struct tty_operations rocket_ops = {
+static const struct tty_operations rocket_ops = {
 	.open = rp_open,
 	.close = rp_close,
 	.write = rp_write,
diff --git a/drivers/char/ser_a2232.c b/drivers/char/ser_a2232.c
index 510bd3e..65c751d 100644
--- a/drivers/char/ser_a2232.c
+++ b/drivers/char/ser_a2232.c
@@ -661,7 +661,7 @@
 	}
 }
 
-static struct tty_operations a2232_ops = {
+static const struct tty_operations a2232_ops = {
 	.open = a2232_open,
 	.close = gs_close,
 	.write = gs_write,
diff --git a/drivers/char/serial167.c b/drivers/char/serial167.c
index 21a710c..b4ea126 100644
--- a/drivers/char/serial167.c
+++ b/drivers/char/serial167.c
@@ -2158,7 +2158,7 @@
 					rcor >> 5, rbpr);
 } /* serial_console_init */
 
-static struct tty_operations cy_ops = {
+static const struct tty_operations cy_ops = {
 	.open = cy_open,
 	.close = cy_close,
 	.write = cy_write,
diff --git a/drivers/char/specialix.c b/drivers/char/specialix.c
index f52c7c3..902c48d 100644
--- a/drivers/char/specialix.c
+++ b/drivers/char/specialix.c
@@ -2363,7 +2363,7 @@
 	func_exit();
 }
 
-static struct tty_operations sx_ops = {
+static const struct tty_operations sx_ops = {
 	.open  = sx_open,
 	.close = sx_close,
 	.write = sx_write,
diff --git a/drivers/char/stallion.c b/drivers/char/stallion.c
index 3beb220..bd71153 100644
--- a/drivers/char/stallion.c
+++ b/drivers/char/stallion.c
@@ -2993,7 +2993,7 @@
 	return(rc);
 }
 
-static struct tty_operations stl_ops = {
+static const struct tty_operations stl_ops = {
 	.open = stl_open,
 	.close = stl_close,
 	.write = stl_write,
diff --git a/drivers/char/sx.c b/drivers/char/sx.c
index e1cd2bc..57e31e5 100644
--- a/drivers/char/sx.c
+++ b/drivers/char/sx.c
@@ -2226,7 +2226,7 @@
 	return 1;
 }
 
-static struct tty_operations sx_ops = {
+static const struct tty_operations sx_ops = {
 	.break_ctl = sx_break,
 	.open	= sx_open,
 	.close = gs_close,
diff --git a/drivers/char/synclink.c b/drivers/char/synclink.c
index 78b1b1a..244dc30 100644
--- a/drivers/char/synclink.c
+++ b/drivers/char/synclink.c
@@ -4360,7 +4360,7 @@
 
 }	/* end of mgsl_allocate_device()*/
 
-static struct tty_operations mgsl_ops = {
+static const struct tty_operations mgsl_ops = {
 	.open = mgsl_open,
 	.close = mgsl_close,
 	.write = mgsl_write,
diff --git a/drivers/char/synclink_gt.c b/drivers/char/synclink_gt.c
index 78bc851..bdc7cb2 100644
--- a/drivers/char/synclink_gt.c
+++ b/drivers/char/synclink_gt.c
@@ -3441,7 +3441,7 @@
 {
 }
 
-static struct tty_operations ops = {
+static const struct tty_operations ops = {
 	.open = open,
 	.close = close,
 	.write = write,
diff --git a/drivers/char/synclinkmp.c b/drivers/char/synclinkmp.c
index 66f3754..6eb75dc 100644
--- a/drivers/char/synclinkmp.c
+++ b/drivers/char/synclinkmp.c
@@ -3929,7 +3929,7 @@
 	}
 }
 
-static struct tty_operations ops = {
+static const struct tty_operations ops = {
 	.open = open,
 	.close = close,
 	.write = write,
diff --git a/drivers/char/tty_io.c b/drivers/char/tty_io.c
index 3337417..e90ea39 100644
--- a/drivers/char/tty_io.c
+++ b/drivers/char/tty_io.c
@@ -3680,7 +3680,8 @@
 	kfree(driver);
 }
 
-void tty_set_operations(struct tty_driver *driver, struct tty_operations *op)
+void tty_set_operations(struct tty_driver *driver,
+			const struct tty_operations *op)
 {
 	driver->open = op->open;
 	driver->close = op->close;
diff --git a/drivers/char/viocons.c b/drivers/char/viocons.c
index f3efeaf..a362ee9 100644
--- a/drivers/char/viocons.c
+++ b/drivers/char/viocons.c
@@ -1047,7 +1047,7 @@
 			0, 0, 0, 0);
 }
 
-static struct tty_operations serial_ops = {
+static const struct tty_operations serial_ops = {
 	.open = viotty_open,
 	.close = viotty_close,
 	.write = viotty_write,
diff --git a/drivers/char/vme_scc.c b/drivers/char/vme_scc.c
index bfe5ea9..c2ca31e 100644
--- a/drivers/char/vme_scc.c
+++ b/drivers/char/vme_scc.c
@@ -113,7 +113,7 @@
 };
 
 
-static struct tty_operations scc_ops = {
+static const struct tty_operations scc_ops = {
 	.open	= scc_open,
 	.close = gs_close,
 	.write = gs_write,
diff --git a/drivers/char/vt.c b/drivers/char/vt.c
index 303956d..ec0c070 100644
--- a/drivers/char/vt.c
+++ b/drivers/char/vt.c
@@ -2675,7 +2675,7 @@
 }
 console_initcall(con_init);
 
-static struct tty_operations con_ops = {
+static const struct tty_operations con_ops = {
 	.open = con_open,
 	.close = con_close,
 	.write = con_write,
diff --git a/drivers/isdn/capi/capi.c b/drivers/isdn/capi/capi.c
index 669f763..11844bb 100644
--- a/drivers/isdn/capi/capi.c
+++ b/drivers/isdn/capi/capi.c
@@ -1298,7 +1298,7 @@
 
 static struct tty_driver *capinc_tty_driver;
 
-static struct tty_operations capinc_ops = {
+static const struct tty_operations capinc_ops = {
 	.open = capinc_tty_open,
 	.close = capinc_tty_close,
 	.write = capinc_tty_write,
diff --git a/drivers/isdn/gigaset/interface.c b/drivers/isdn/gigaset/interface.c
index bd2e426..596f3ae 100644
--- a/drivers/isdn/gigaset/interface.c
+++ b/drivers/isdn/gigaset/interface.c
@@ -134,7 +134,7 @@
 static int  if_write(struct tty_struct *tty,
 		     const unsigned char *buf, int count);
 
-static struct tty_operations if_ops = {
+static const struct tty_operations if_ops = {
 	.open =			if_open,
 	.close =		if_close,
 	.ioctl =		if_ioctl,
diff --git a/drivers/isdn/i4l/isdn_tty.c b/drivers/isdn/i4l/isdn_tty.c
index 9ab66e8..2b91bb0 100644
--- a/drivers/isdn/i4l/isdn_tty.c
+++ b/drivers/isdn/i4l/isdn_tty.c
@@ -1860,7 +1860,7 @@
 		send_sig(SIGIO, dev->profd, 1);
 }
 
-static struct tty_operations modem_ops = {
+static const struct tty_operations modem_ops = {
         .open = isdn_tty_open,
 	.close = isdn_tty_close,
 	.write = isdn_tty_write,
diff --git a/drivers/s390/char/con3215.c b/drivers/s390/char/con3215.c
index 2fa566f..d7de175d 100644
--- a/drivers/s390/char/con3215.c
+++ b/drivers/s390/char/con3215.c
@@ -1103,7 +1103,7 @@
 	}
 }
 
-static struct tty_operations tty3215_ops = {
+static const struct tty_operations tty3215_ops = {
 	.open = tty3215_open,
 	.close = tty3215_close,
 	.write = tty3215_write,
diff --git a/drivers/s390/char/sclp_tty.c b/drivers/s390/char/sclp_tty.c
index f6cf902..6f43e04d 100644
--- a/drivers/s390/char/sclp_tty.c
+++ b/drivers/s390/char/sclp_tty.c
@@ -711,7 +711,7 @@
 	.receiver_fn = sclp_tty_receiver
 };
 
-static struct tty_operations sclp_ops = {
+static const struct tty_operations sclp_ops = {
 	.open = sclp_tty_open,
 	.close = sclp_tty_close,
 	.write = sclp_tty_write,
diff --git a/drivers/s390/char/sclp_vt220.c b/drivers/s390/char/sclp_vt220.c
index 54fba6f..723bf41 100644
--- a/drivers/s390/char/sclp_vt220.c
+++ b/drivers/s390/char/sclp_vt220.c
@@ -655,7 +655,7 @@
 	return 0;
 }
 
-static struct tty_operations sclp_vt220_ops = {
+static const struct tty_operations sclp_vt220_ops = {
 	.open = sclp_vt220_open,
 	.close = sclp_vt220_close,
 	.write = sclp_vt220_write,
diff --git a/drivers/s390/char/tty3270.c b/drivers/s390/char/tty3270.c
index 06e2eee..4717c36 100644
--- a/drivers/s390/char/tty3270.c
+++ b/drivers/s390/char/tty3270.c
@@ -1737,7 +1737,7 @@
 	return kbd_ioctl(tp->kbd, file, cmd, arg);
 }
 
-static struct tty_operations tty3270_ops = {
+static const struct tty_operations tty3270_ops = {
 	.open = tty3270_open,
 	.close = tty3270_close,
 	.write = tty3270_write,
diff --git a/drivers/sbus/char/aurora.c b/drivers/sbus/char/aurora.c
index 4fdb2c9..a305d40 100644
--- a/drivers/sbus/char/aurora.c
+++ b/drivers/sbus/char/aurora.c
@@ -2187,7 +2187,7 @@
 #endif
 }
 
-static struct tty_operations aurora_ops = {
+static const struct tty_operations aurora_ops = {
 	.open  = aurora_open,
 	.close = aurora_close,
 	.write = aurora_write,
diff --git a/drivers/serial/68328serial.c b/drivers/serial/68328serial.c
index 993a702..bac853c 100644
--- a/drivers/serial/68328serial.c
+++ b/drivers/serial/68328serial.c
@@ -1378,7 +1378,7 @@
 #endif /* CONFIG_PM_LEGACY */
 
 
-static struct tty_operations rs_ops = {
+static const struct tty_operations rs_ops = {
 	.open = rs_open,
 	.close = rs_close,
 	.write = rs_write,
diff --git a/drivers/serial/68360serial.c b/drivers/serial/68360serial.c
index e80e70e..1b299e8 100644
--- a/drivers/serial/68360serial.c
+++ b/drivers/serial/68360serial.c
@@ -2424,7 +2424,7 @@
 */
 static	int	baud_idx;
 
-static struct tty_operations rs_360_ops = {
+static const struct tty_operations rs_360_ops = {
 	.owner = THIS_MODULE,
 	.open = rs_360_open,
 	.close = rs_360_close,
diff --git a/drivers/serial/crisv10.c b/drivers/serial/crisv10.c
index cabd048..9851d9e 100644
--- a/drivers/serial/crisv10.c
+++ b/drivers/serial/crisv10.c
@@ -4825,7 +4825,7 @@
 
 /* rs_init inits the driver at boot (using the module_init chain) */
 
-static struct tty_operations rs_ops = {
+static const struct tty_operations rs_ops = {
 	.open = rs_open,
 	.close = rs_close,
 	.write = rs_write,
diff --git a/drivers/serial/mcfserial.c b/drivers/serial/mcfserial.c
index 832abd3..00d7859 100644
--- a/drivers/serial/mcfserial.c
+++ b/drivers/serial/mcfserial.c
@@ -1666,7 +1666,7 @@
 	printk(mcfrs_drivername);
 }
 
-static struct tty_operations mcfrs_ops = {
+static const struct tty_operations mcfrs_ops = {
 	.open = mcfrs_open,
 	.close = mcfrs_close,
 	.write = mcfrs_write,
diff --git a/drivers/serial/serial_core.c b/drivers/serial/serial_core.c
index 5f7ba1ad..de5e893 100644
--- a/drivers/serial/serial_core.c
+++ b/drivers/serial/serial_core.c
@@ -2111,7 +2111,7 @@
 	}
 }
 
-static struct tty_operations uart_ops = {
+static const struct tty_operations uart_ops = {
 	.open		= uart_open,
 	.close		= uart_close,
 	.write		= uart_write,
diff --git a/drivers/tc/zs.c b/drivers/tc/zs.c
index 5e8a276..622881f 100644
--- a/drivers/tc/zs.c
+++ b/drivers/tc/zs.c
@@ -1701,7 +1701,7 @@
 	spin_unlock_irqrestore(&zs_lock, flags);
 }
 
-static struct tty_operations serial_ops = {
+static const struct tty_operations serial_ops = {
 	.open = rs_open,
 	.close = rs_close,
 	.write = rs_write,
diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index ca90326..7128829 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -1120,7 +1120,7 @@
  * TTY driver structures.
  */
 
-static struct tty_operations acm_ops = {
+static const struct tty_operations acm_ops = {
 	.open =			acm_tty_open,
 	.close =		acm_tty_close,
 	.write =		acm_tty_write,
diff --git a/drivers/usb/gadget/serial.c b/drivers/usb/gadget/serial.c
index b893e31..489a85e 100644
--- a/drivers/usb/gadget/serial.c
+++ b/drivers/usb/gadget/serial.c
@@ -271,7 +271,7 @@
 
 
 /* tty driver struct */
-static struct tty_operations gs_tty_ops = {
+static const struct tty_operations gs_tty_ops = {
 	.open =			gs_open,
 	.close =		gs_close,
 	.write =		gs_write,
diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c
index 0222d92..8006e51 100644
--- a/drivers/usb/serial/usb-serial.c
+++ b/drivers/usb/serial/usb-serial.c
@@ -1015,7 +1015,7 @@
 	dev_info(dev, "device disconnected\n");
 }
 
-static struct tty_operations serial_ops = {
+static const struct tty_operations serial_ops = {
 	.open =			serial_open,
 	.close =		serial_close,
 	.write =		serial_write,
diff --git a/include/linux/tty_driver.h b/include/linux/tty_driver.h
index 58c961c..5c8473b 100644
--- a/include/linux/tty_driver.h
+++ b/include/linux/tty_driver.h
@@ -219,7 +219,8 @@
 
 struct tty_driver *alloc_tty_driver(int lines);
 void put_tty_driver(struct tty_driver *driver);
-void tty_set_operations(struct tty_driver *driver, struct tty_operations *op);
+void tty_set_operations(struct tty_driver *driver,
+			const struct tty_operations *op);
 
 /* tty driver magic number */
 #define TTY_DRIVER_MAGIC		0x5402
diff --git a/net/bluetooth/rfcomm/tty.c b/net/bluetooth/rfcomm/tty.c
index 26f3227..1958ad1 100644
--- a/net/bluetooth/rfcomm/tty.c
+++ b/net/bluetooth/rfcomm/tty.c
@@ -1011,7 +1011,7 @@
 
 /* ---- TTY structure ---- */
 
-static struct tty_operations rfcomm_ops = {
+static const struct tty_operations rfcomm_ops = {
 	.open			= rfcomm_tty_open,
 	.close			= rfcomm_tty_close,
 	.write			= rfcomm_tty_write,
diff --git a/net/irda/ircomm/ircomm_tty.c b/net/irda/ircomm/ircomm_tty.c
index 3bcdb46..d50a020 100644
--- a/net/irda/ircomm/ircomm_tty.c
+++ b/net/irda/ircomm/ircomm_tty.c
@@ -79,7 +79,7 @@
 
 hashbin_t *ircomm_tty = NULL;
 
-static struct tty_operations ops = {
+static const struct tty_operations ops = {
 	.open            = ircomm_tty_open,
 	.close           = ircomm_tty_close,
 	.write           = ircomm_tty_write,