linux-kernel - [PATCH 4/5] tty: Move the leader test in disassociate

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Message-ID: <20091118142621.3806.50993.stgit@localhost.localdomain>
Date:	Wed, 18 Nov 2009 14:26:29 +0000
From:	Alan Cox <alan@...ux.intel.com>
To:	linux-kernel@...r.kernel.org
Subject: [PATCH 4/5] tty: Move the leader test in disassociate

There are two call points, both want to check that tty->signal->leader is
set. Move the test into disassociate_ctty() as that will make locking
changes easier in a bit

Signed-off-by: Alan Cox <alan@...ux.intel.com>
---

 drivers/char/tty_io.c |    5 +++--
 kernel/exit.c         |    2 +-
 2 files changed, 4 insertions(+), 3 deletions(-)


diff --git a/drivers/char/tty_io.c b/drivers/char/tty_io.c
index f4a0404..aee68f5 100644
--- a/drivers/char/tty_io.c
+++ b/drivers/char/tty_io.c
@@ -707,6 +707,8 @@ void disassociate_ctty(int on_exit)
 	struct tty_struct *tty;
 	struct pid *tty_pgrp = NULL;
 
+	if (!current->signal->leader)
+		return;
 
 	tty = get_current_tty();
 	if (tty) {
@@ -772,8 +774,7 @@ void no_tty(void)
 {
 	struct task_struct *tsk = current;
 	lock_kernel();
-	if (tsk->signal->leader)
-		disassociate_ctty(0);
+	disassociate_ctty(0);
 	unlock_kernel();
 	proc_clear_tty(tsk);
 }
diff --git a/kernel/exit.c b/kernel/exit.c
index f7864ac..dbca05b 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -970,7 +970,7 @@ NORET_TYPE void do_exit(long code)
 	exit_thread();
 	cgroup_exit(tsk, 1);
 
-	if (group_dead && tsk->signal->leader)
+	if (group_dead)
 		disassociate_ctty(1);
 
 	module_put(task_thread_info(tsk)->exec_domain->module);

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