X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=include%2Flinux%2Ftty_ldisc.h;h=deacf01e50e8a5e6351e898b6f6910e69581f732;hb=c7b5ebbddf7bcd3651947760f423e3783bbe6573;hp=cb7ca58e44e8e6031fd1d1a45edbb278a3c20815;hpb=9213980e6a70d8473e0ffd4b39ab5b6caaba9ff5;p=linux-2.6.git

diff --git a/include/linux/tty_ldisc.h b/include/linux/tty_ldisc.h
index cb7ca58e4..deacf01e5 100644
--- a/include/linux/tty_ldisc.h
+++ b/include/linux/tty_ldisc.h
@@ -95,6 +95,13 @@
  * 	that line discpline should try to send more characters to the
  * 	low-level driver for transmission.  If the line discpline does
  * 	not have any more data to send, it can just return.
+ *
+ * int (*hangup)(struct tty_struct *)
+ *
+ *	Called on a hangup. Tells the discipline that it should
+ *	cease I/O to the tty driver. Can sleep. The driver should
+ *	seek to perform this action quickly but should wait until
+ *	any pending driver I/O is completed.
  */
 
 #include <linux/fs.h>
@@ -122,6 +129,7 @@ struct tty_ldisc {
 	void	(*set_termios)(struct tty_struct *tty, struct termios * old);
 	unsigned int (*poll)(struct tty_struct *, struct file *,
 			     struct poll_table_struct *);
+	int	(*hangup)(struct tty_struct *tty);
 	
 	/*
 	 * The following routines are called from below.
@@ -132,6 +140,8 @@ struct tty_ldisc {
 	void	(*write_wakeup)(struct tty_struct *);
 
 	struct  module *owner;
+	
+	int refcount;
 };
 
 #define TTY_LDISC_MAGIC	0x5403