From: Adrian Bunk <bunk@kernel.org>

This patch removes the no longer used is_tty().

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Acked-by: Alan Cox <alan@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 drivers/char/tty_io.c |   13 -------------
 1 file changed, 13 deletions(-)

diff -puN drivers/char/tty_io.c~remove-is_tty drivers/char/tty_io.c
--- a/drivers/char/tty_io.c~remove-is_tty
+++ a/drivers/char/tty_io.c
@@ -1590,19 +1590,6 @@ int tty_hung_up_p(struct file *filp)
 
 EXPORT_SYMBOL(tty_hung_up_p);
 
-/**
- *	is_tty	-	checker whether file is a TTY
- *	@filp:		file handle that may be a tty
- *
- *	Check if the file handle is a tty handle.
- */
-
-int is_tty(struct file *filp)
-{
-	return filp->f_op->read == tty_read
-		|| filp->f_op->read == hung_up_tty_read;
-}
-
 static void session_clear_tty(struct pid *session)
 {
 	struct task_struct *p;
_