From: Peter Hurley <peter@hurleysoftware.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org,
Jiri Slaby <jslaby@suse.cz>,
One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk>,
Peter Hurley <peter@hurleysoftware.com>
Subject: [PATCH -next 03/10] tty: Remove tsk parameter from proc_set_tty()
Date: Thu, 16 Oct 2014 14:59:43 -0400 [thread overview]
Message-ID: <1413485990-16855-4-git-send-email-peter@hurleysoftware.com> (raw)
In-Reply-To: <1413485990-16855-1-git-send-email-peter@hurleysoftware.com>
Only the current task itself can set its controlling tty (other
than before the task has been forked). Equivalent to existing usage.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
---
drivers/tty/tty_io.c | 28 ++++++++++++++--------------
1 file changed, 14 insertions(+), 14 deletions(-)
diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c
index 012647b..272d977 100644
--- a/drivers/tty/tty_io.c
+++ b/drivers/tty/tty_io.c
@@ -504,7 +504,7 @@ void proc_clear_tty(struct task_struct *p)
/* Called under the sighand lock */
-static void __proc_set_tty(struct task_struct *tsk, struct tty_struct *tty)
+static void __proc_set_tty(struct tty_struct *tty)
{
if (tty) {
unsigned long flags;
@@ -512,24 +512,24 @@ static void __proc_set_tty(struct task_struct *tsk, struct tty_struct *tty)
spin_lock_irqsave(&tty->ctrl_lock, flags);
put_pid(tty->session);
put_pid(tty->pgrp);
- tty->pgrp = get_pid(task_pgrp(tsk));
+ tty->pgrp = get_pid(task_pgrp(current));
spin_unlock_irqrestore(&tty->ctrl_lock, flags);
- tty->session = get_pid(task_session(tsk));
- if (tsk->signal->tty) {
+ tty->session = get_pid(task_session(current));
+ if (current->signal->tty) {
printk(KERN_DEBUG "tty not NULL!!\n");
- tty_kref_put(tsk->signal->tty);
+ tty_kref_put(current->signal->tty);
}
}
- put_pid(tsk->signal->tty_old_pgrp);
- tsk->signal->tty = tty_kref_get(tty);
- tsk->signal->tty_old_pgrp = NULL;
+ put_pid(current->signal->tty_old_pgrp);
+ current->signal->tty = tty_kref_get(tty);
+ current->signal->tty_old_pgrp = NULL;
}
-static void proc_set_tty(struct task_struct *tsk, struct tty_struct *tty)
+static void proc_set_tty(struct tty_struct *tty)
{
- spin_lock_irq(&tsk->sighand->siglock);
- __proc_set_tty(tsk, tty);
- spin_unlock_irq(&tsk->sighand->siglock);
+ spin_lock_irq(¤t->sighand->siglock);
+ __proc_set_tty(tty);
+ spin_unlock_irq(¤t->sighand->siglock);
}
struct tty_struct *get_current_tty(void)
@@ -2164,7 +2164,7 @@ retry_open:
current->signal->leader &&
!current->signal->tty &&
tty->session == NULL)
- __proc_set_tty(current, tty);
+ __proc_set_tty(tty);
spin_unlock_irq(¤t->sighand->siglock);
tty_unlock(tty);
mutex_unlock(&tty_mutex);
@@ -2489,7 +2489,7 @@ static int tiocsctty(struct tty_struct *tty, int arg)
goto unlock;
}
}
- proc_set_tty(current, tty);
+ proc_set_tty(tty);
unlock:
mutex_unlock(&tty_mutex);
return ret;
--
2.1.1
next prev parent reply other threads:[~2014-10-16 18:59 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-16 18:59 [PATCH -next 00/10] Fixes to controlling tty handling Peter Hurley
2014-10-16 18:59 ` [PATCH -next 01/10] tty: Remove tty_pair_get_tty()/tty_pair_get_pty() api Peter Hurley
2014-10-16 18:59 ` [PATCH -next 02/10] tty: Reorder proc_set_tty() and related fns Peter Hurley
2014-10-16 18:59 ` Peter Hurley [this message]
2014-10-16 18:59 ` [PATCH -next 04/10] uml: Fix unsafe pid reference to foreground process group Peter Hurley
2014-10-17 7:57 ` Richard Weinberger
2014-10-16 18:59 ` [PATCH -next 05/10] tty: Replace open-coded tty_get_pgrp() Peter Hurley
2014-10-16 18:59 ` [PATCH -next 06/10] tty: Remove !tty condition from __proc_set_tty() Peter Hurley
2014-10-16 18:59 ` [PATCH -next 07/10] tty: Fix multiple races when setting the controlling terminal Peter Hurley
2014-10-16 18:59 ` [PATCH -next 08/10] tty: Move session_of_pgrp() and make static Peter Hurley
2014-10-16 18:59 ` [PATCH -next 09/10] tty: Serialize proc_set_tty() with tty_lock Peter Hurley
2014-10-16 18:59 ` [PATCH -next 10/10] tty: Update code comment in __proc_set_tty() Peter Hurley
2014-10-22 15:00 ` [PATCH -next 00/10] Fixes to controlling tty handling One Thousand Gnomes
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