Merge tag 'tty-6.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

Pull tty/serial driver updates from Greg KH:
 "Here is the big set of TTY and Serial driver updates for 6.1-rc1.

  Lots of cleanups in here, no real new functionality this time around,
  with the diffstat being that we removed more lines than we added!

  Included in here are:

   - termios unification cleanups from Al Viro, it's nice to finally get
     this work done

   - tty serial transmit cleanups in various drivers in preparation for
     more cleanup and unification in future releases (that work was not
     ready for this release)

   - n_gsm fixes and updates

   - ktermios cleanups and code reductions

   - dt bindings json conversions and updates for new devices

   - some serial driver updates for new devices

   - lots of other tiny cleanups and janitorial stuff. Full details in
     the shortlog.

  All of these have been in linux-next for a while with no reported
  issues"

* tag 'tty-6.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (102 commits)
  serial: cpm_uart: Don't request IRQ too early for console port
  tty: serial: do unlock on a common path in altera_jtaguart_console_putc()
  tty: serial: unify TX space reads under altera_jtaguart_tx_space()
  tty: serial: use FIELD_GET() in lqasc_tx_ready()
  tty: serial: extend lqasc_tx_ready() to lqasc_console_putchar()
  tty: serial: allow pxa.c to be COMPILE_TESTed
  serial: stm32: Fix unused-variable warning
  tty: serial: atmel: Add COMMON_CLK dependency to SERIAL_ATMEL
  serial: 8250: Fix restoring termios speed after suspend
  serial: Deassert Transmit Enable on probe in driver-specific way
  serial: 8250_dma: Convert to use uart_xmit_advance()
  serial: 8250_omap: Convert to use uart_xmit_advance()
  MAINTAINERS: Solve warning regarding inexistent atmel-usart binding
  serial: stm32: Deassert Transmit Enable on ->rs485_config()
  serial: ar933x: Deassert Transmit Enable on ->rs485_config()
  tty: serial: atmel: Use FIELD_PREP/FIELD_GET
  tty: serial: atmel: Make the driver aware of the existence of GCLK
  tty: serial: atmel: Only divide Clock Divisor if the IP is USART
  tty: serial: atmel: Separate mode clearing between UART and USART
  dt-bindings: serial: atmel,at91-usart: Add gclk as a possible USART clock
  ...

1 files changed, 3 insertions, 7 deletions

diff --git a/include/linux/tty_driver.h b/include/linux/tty_driver.h
index 4841d8069c07..e00034118c7b 100644
--- a/include/linux/tty_driver.h
+++ b/include/linux/tty_driver.h
@@ -7,6 +7,7 @@
 #include <linux/kref.h>
 #include <linux/list.h>
 #include <linux/cdev.h>
+#include <linux/uaccess.h>
 #include <linux/termios.h>
 #include <linux/seq_file.h>
 
@@ -141,7 +142,7 @@ struct serial_struct;
  *
  *	Optional.
  *
- * @set_termios: ``void ()(struct tty_struct *tty, struct ktermios *old)``
+ * @set_termios: ``void ()(struct tty_struct *tty, const struct ktermios *old)``
  *
  *	This routine allows the @tty driver to be notified when device's
  *	termios settings have changed. New settings are in @tty->termios.
@@ -365,7 +366,7 @@ struct tty_operations {
 		    unsigned int cmd, unsigned long arg);
 	long (*compat_ioctl)(struct tty_struct *tty,
 			     unsigned int cmd, unsigned long arg);
-	void (*set_termios)(struct tty_struct *tty, struct ktermios * old);
+	void (*set_termios)(struct tty_struct *tty, const struct ktermios *old);
 	void (*throttle)(struct tty_struct * tty);
 	void (*unthrottle)(struct tty_struct * tty);
 	void (*stop)(struct tty_struct *tty);
@@ -396,7 +397,6 @@ struct tty_operations {
 /**
  * struct tty_driver -- driver for TTY devices
  *
- * @magic: set to %TTY_DRIVER_MAGIC in __tty_alloc_driver()
  * @kref: reference counting. Reaching zero frees all the internals and the
  *	  driver.
  * @cdevs: allocated/registered character /dev devices
@@ -432,7 +432,6 @@ struct tty_operations {
  * @driver_name, @name, @type, @subtype, @init_termios, and @ops.
  */
 struct tty_driver {
-	int	magic;
 	struct kref kref;
 	struct cdev **cdevs;
 	struct module	*owner;
@@ -489,9 +488,6 @@ static inline void tty_set_operations(struct tty_driver *driver,
 	driver->ops = op;
 }
 
-/* tty driver magic number */
-#define TTY_DRIVER_MAGIC		0x5402
-
 /**
  * DOC: TTY Driver Flags
  *