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@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/char/tty_io.c b/drivers/char/tty_io.c
index cc941a3..a19fef2 100644 (file)
--- 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 1143012..6f50ef5 100644 (file)
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -971,7 +971,7 @@ 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);