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Subject[PATCH 7/8] do not change dead_task->exit_signal
__ptrace_detach() and do_notify_parent() set task->exit_signal = -1
to mark the task dead. This is no longer needed, nobody checks
exit_signal to detect the EXIT_DEAD task.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
---

kernel/ptrace.c | 1 -
kernel/signal.c | 1 -
2 files changed, 2 deletions(-)

--- ptrace/kernel/ptrace.c~7_dont_change_exit_signal 2011-06-22 22:47:11.000000000 +0200
+++ ptrace/kernel/ptrace.c 2011-06-22 22:47:14.000000000 +0200
@@ -384,7 +384,6 @@ static bool __ptrace_detach(struct task_
dead = do_notify_parent(p, p->exit_signal);
else if (ignoring_children(tracer->sighand)) {
__wake_up_parent(p, tracer);
- p->exit_signal = -1;
dead = true;
}
}
--- ptrace/kernel/signal.c~7_dont_change_exit_signal 2011-06-22 22:47:11.000000000 +0200
+++ ptrace/kernel/signal.c 2011-06-22 22:47:14.000000000 +0200
@@ -1650,7 +1650,6 @@ bool do_notify_parent(struct task_struct
* it, just use SIG_IGN instead).
*/
autoreap = true;
- tsk->exit_signal = -1;
if (psig->action[SIGCHLD-1].sa.sa_handler == SIG_IGN)
sig = 0;
}


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