linux-kernel - [PATCH 1/9] n_tty: Remove unused echo

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1366039787-8719-2-git-send-email-peter@hurleysoftware.com>
Date:	Mon, 15 Apr 2013 11:29:39 -0400
From:	Peter Hurley <peter@...leysoftware.com>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	Jiri Slaby <jslaby@...e.cz>, linux-serial@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Peter Hurley <peter@...leysoftware.com>
Subject: [PATCH 1/9] n_tty: Remove unused echo_overrun field

The echo_overrun field is only assigned and never tested; remove it.

Signed-off-by: Peter Hurley <peter@...leysoftware.com>
---
 drivers/tty/n_tty.c | 8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c
index 4dbb558..e9a392a 100644
--- a/drivers/tty/n_tty.c
+++ b/drivers/tty/n_tty.c
@@ -96,7 +96,6 @@ struct n_tty_data {
 
 	/* must hold exclusive termios_rwsem to reset these */
 	unsigned char lnext:1, erasing:1, raw:1, real_raw:1, icanon:1;
-	unsigned char echo_overrun:1;
 
 	/* shared by producer and consumer */
 	char *read_buf;
@@ -325,7 +324,7 @@ static void reset_buffer_flags(struct n_tty_data *ldata)
 	ldata->read_head = ldata->canon_head = ldata->read_tail = 0;
 
 	mutex_lock(&ldata->echo_lock);
-	ldata->echo_pos = ldata->echo_cnt = ldata->echo_overrun = 0;
+	ldata->echo_pos = ldata->echo_cnt = 0;
 	mutex_unlock(&ldata->echo_lock);
 
 	ldata->erasing = 0;
@@ -782,14 +781,11 @@ static void process_echoes(struct tty_struct *tty)
 	if (nr == 0) {
 		ldata->echo_pos = 0;
 		ldata->echo_cnt = 0;
-		ldata->echo_overrun = 0;
 	} else {
 		int num_processed = ldata->echo_cnt - nr;
 		ldata->echo_pos += num_processed;
 		ldata->echo_pos &= N_TTY_BUF_SIZE - 1;
 		ldata->echo_cnt = nr;
-		if (num_processed > 0)
-			ldata->echo_overrun = 0;
 	}
 
 	mutex_unlock(&ldata->echo_lock);
@@ -835,8 +831,6 @@ static void add_echo_byte(unsigned char c, struct n_tty_data *ldata)
 			ldata->echo_pos++;
 		}
 		ldata->echo_pos &= N_TTY_BUF_SIZE - 1;
-
-		ldata->echo_overrun = 1;
 	} else {
 		new_byte_pos = ldata->echo_pos + ldata->echo_cnt;
 		new_byte_pos &= N_TTY_BUF_SIZE - 1;
-- 
1.8.1.2

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/