[PATCH] tty: switch to ktermios and new framework

This is the core of the switch to the new framework.  I've split it from the
driver patches which are mostly search/replace and would encourage people to
give this one a good hard stare.

The references to BOTHER and ISHIFT are the termios values that must be
defined by a platform once it wants to turn on "new style" ioctl support.  The
code patches here ensure that providing

1. The termios overlays the ktermios in memory
2. The only new kernel only fields are c_ispeed/c_ospeed (or none)

the existing behaviour is retained.  This is true for the patches at this
point in time.

Future patches will define BOTHER, ISHIFT and enable newer termios structures
for each architecture, and once they are all done some of the ifdefs also
vanish.

[akpm@osdl.org: warning fix]
[akpm@osdl.org: IRDA fix]
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

3 files changed, 13 insertions, 12 deletions

diff --git a/include/linux/tty.h b/include/linux/tty.h
index 1d29999a3439..65cbcf22c31e 100644
--- a/include/linux/tty.h
+++ b/include/linux/tty.h
@@ -175,7 +175,7 @@ struct tty_struct {
 	int index;
 	struct tty_ldisc ldisc;
 	struct mutex termios_mutex;
-	struct termios *termios, *termios_locked;
+	struct ktermios *termios, *termios_locked;
 	char name[64];
 	int pgrp;
 	int session;
@@ -258,7 +258,7 @@ struct tty_struct {
 
 extern void tty_write_flush(struct tty_struct *);
 
-extern struct termios tty_std_termios;
+extern struct ktermios tty_std_termios;
 
 extern int kmsg_redirect;
 
@@ -293,8 +293,9 @@ extern int tty_hung_up_p(struct file * filp);
 extern void do_SAK(struct tty_struct *tty);
 extern void disassociate_ctty(int priv);
 extern void tty_flip_buffer_push(struct tty_struct *tty);
-extern int tty_get_baud_rate(struct tty_struct *tty);
-extern int tty_termios_baud_rate(struct termios *termios);
+extern speed_t tty_get_baud_rate(struct tty_struct *tty);
+extern speed_t tty_termios_baud_rate(struct ktermios *termios);
+extern speed_t tty_termios_input_baud_rate(struct ktermios *termios);
 
 extern struct tty_ldisc *tty_ldisc_ref(struct tty_struct *);
 extern void tty_ldisc_deref(struct tty_ldisc *);
diff --git a/include/linux/tty_driver.h b/include/linux/tty_driver.h
index 5c8473bb6882..659487e3ebeb 100644
--- a/include/linux/tty_driver.h
+++ b/include/linux/tty_driver.h
@@ -53,7 +53,7 @@
  *	device-specific ioctl's.  If the ioctl number passed in cmd
  * 	is not recognized by the driver, it should return ENOIOCTLCMD.
  * 
- * void (*set_termios)(struct tty_struct *tty, struct termios * old);
+ * void (*set_termios)(struct tty_struct *tty, struct ktermios * old);
  *
  * 	This routine allows the tty driver to be notified when
  * 	device's termios settings have changed.  Note that a
@@ -132,7 +132,7 @@ struct tty_operations {
 	int  (*chars_in_buffer)(struct tty_struct *tty);
 	int  (*ioctl)(struct tty_struct *tty, struct file * file,
 		    unsigned int cmd, unsigned long arg);
-	void (*set_termios)(struct tty_struct *tty, struct termios * old);
+	void (*set_termios)(struct tty_struct *tty, struct ktermios * old);
 	void (*throttle)(struct tty_struct * tty);
 	void (*unthrottle)(struct tty_struct * tty);
 	void (*stop)(struct tty_struct *tty);
@@ -165,7 +165,7 @@ struct tty_driver {
 	int	num;		/* number of devices allocated */
 	short	type;		/* type of tty driver */
 	short	subtype;	/* subtype of tty driver */
-	struct termios init_termios; /* Initial termios */
+	struct ktermios init_termios; /* Initial termios */
 	int	flags;		/* tty driver flags */
 	int	refcount;	/* for loadable tty drivers */
 	struct proc_dir_entry *proc_entry; /* /proc fs entry */
@@ -175,8 +175,8 @@ struct tty_driver {
 	 * Pointer to the tty data structures
 	 */
 	struct tty_struct **ttys;
-	struct termios **termios;
-	struct termios **termios_locked;
+	struct ktermios **termios;
+	struct ktermios **termios_locked;
 	void *driver_state;	/* only used for the PTY driver */
 	
 	/*
@@ -193,7 +193,7 @@ struct tty_driver {
 	int  (*chars_in_buffer)(struct tty_struct *tty);
 	int  (*ioctl)(struct tty_struct *tty, struct file * file,
 		    unsigned int cmd, unsigned long arg);
-	void (*set_termios)(struct tty_struct *tty, struct termios * old);
+	void (*set_termios)(struct tty_struct *tty, struct ktermios * old);
 	void (*throttle)(struct tty_struct * tty);
 	void (*unthrottle)(struct tty_struct * tty);
 	void (*stop)(struct tty_struct *tty);
diff --git a/include/linux/tty_ldisc.h b/include/linux/tty_ldisc.h
index 83c6e6c10ebb..d75932e27710 100644
--- a/include/linux/tty_ldisc.h
+++ b/include/linux/tty_ldisc.h
@@ -59,7 +59,7 @@
  * 	low-level driver can "grab" an ioctl request before the line
  * 	discpline has a chance to see it.
  * 
- * void	(*set_termios)(struct tty_struct *tty, struct termios * old);
+ * void	(*set_termios)(struct tty_struct *tty, struct ktermios * old);
  *
  * 	This function notifies the line discpline that a change has
  * 	been made to the termios structure.
@@ -118,7 +118,7 @@ struct tty_ldisc {
 			 const unsigned char * buf, size_t nr);	
 	int	(*ioctl)(struct tty_struct * tty, struct file * file,
 			 unsigned int cmd, unsigned long arg);
-	void	(*set_termios)(struct tty_struct *tty, struct termios * old);
+	void	(*set_termios)(struct tty_struct *tty, struct ktermios * old);
 	unsigned int (*poll)(struct tty_struct *, struct file *,
 			     struct poll_table_struct *);
 	int	(*hangup)(struct tty_struct *tty);