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tty: Add a kref count

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Introduce a kref to the tty structure and use it to protect the tty->signal
tty references. For now we don't introduce it for anything else.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alan Cox
2008-10-13 10:37:26 +01:00
committed by Linus Torvalds
parent 348eb12e55
commit 9c9f4ded90
4 changed files with 71 additions and 10 deletions
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4
kernel/sys.c
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@ -1060,9 +1060,7 @@ asmlinkage long sys_setsid(void)
group_leader->signal->leader = 1;
__set_special_pids(sid);
spin_lock(&group_leader->sighand->siglock);
group_leader->signal->tty = NULL;
spin_unlock(&group_leader->sighand->siglock);
proc_clear_tty(group_leader);
err = session;
out: