linux-kernel - [PATCH -next 01/10] tty: Remove tty_pair_get_tty()/tty_pair_get

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Date:	Thu, 16 Oct 2014 14:59:41 -0400
From:	Peter Hurley <peter@...leysoftware.com>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org,
	Jiri Slaby <jslaby@...e.cz>,
	One Thousand Gnomes <gnomes@...rguk.ukuu.org.uk>,
	Peter Hurley <peter@...leysoftware.com>
Subject: [PATCH -next 01/10] tty: Remove tty_pair_get_tty()/tty_pair_get_pty() api

tty_pair_get_pty() has no in-tree users and tty_pair_get_tty()
has only one file-local user. Remove the external declarations,
the export declarations, and declare tty_pair_get_tty() static.

Signed-off-by: Peter Hurley <peter@...leysoftware.com>
---
 drivers/tty/tty_io.c | 16 +++++-----------
 include/linux/tty.h  |  3 ---
 2 files changed, 5 insertions(+), 14 deletions(-)

diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c
index 8cce5ab..274e386 100644
--- a/drivers/tty/tty_io.c
+++ b/drivers/tty/tty_io.c
@@ -2710,23 +2710,17 @@ static int tty_tiocgicount(struct tty_struct *tty, void __user *arg)
 	return 0;
 }
 
-struct tty_struct *tty_pair_get_tty(struct tty_struct *tty)
+/*
+ * if pty, return the slave side (real_tty)
+ * otherwise, return self
+ */
+static struct tty_struct *tty_pair_get_tty(struct tty_struct *tty)
 {
 	if (tty->driver->type == TTY_DRIVER_TYPE_PTY &&
 	    tty->driver->subtype == PTY_TYPE_MASTER)
 		tty = tty->link;
 	return tty;
 }
-EXPORT_SYMBOL(tty_pair_get_tty);
-
-struct tty_struct *tty_pair_get_pty(struct tty_struct *tty)
-{
-	if (tty->driver->type == TTY_DRIVER_TYPE_PTY &&
-	    tty->driver->subtype == PTY_TYPE_MASTER)
-	    return tty;
-	return tty->link;
-}
-EXPORT_SYMBOL(tty_pair_get_pty);
 
 /*
  * Split this up, as gcc can choke on it otherwise..
diff --git a/include/linux/tty.h b/include/linux/tty.h
index 5171ef8..b36b0b4 100644
--- a/include/linux/tty.h
+++ b/include/linux/tty.h
@@ -498,9 +498,6 @@ extern int tty_init_termios(struct tty_struct *tty);
 extern int tty_standard_install(struct tty_driver *driver,
 		struct tty_struct *tty);
 
-extern struct tty_struct *tty_pair_get_tty(struct tty_struct *tty);
-extern struct tty_struct *tty_pair_get_pty(struct tty_struct *tty);
-
 extern struct mutex tty_mutex;
 extern spinlock_t tty_files_lock;
 
-- 
2.1.1

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