[PATCH 3/3] ptrace: wait_consider_task: s/same_thread_group/ptrace_reparented/

[Oleg Nesterov <oleg@redhat.com>]

wait_consider_task() checks same_thread_group(parent, real_parent),
this is the open-coded ptrace_reparented().

__ptrace_detach() remains the only function which has to check this by
hand, although we could reorganize the code to delay __ptrace_unlink.

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

 kernel/exit.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- ptrace/kernel/exit.c~11_p_r_more_users	2011-06-23 19:11:34.000000000 +0200
+++ ptrace/kernel/exit.c	2011-06-24 17:10:07.000000000 +0200
@@ -1598,8 +1598,7 @@ static int wait_consider_task(struct wai
 		 * own children, it should create a separate process which
 		 * takes the role of real parent.
 		 */
-		if (likely(!ptrace) && p->ptrace &&
-		    same_thread_group(p->parent, p->real_parent))
+		if (likely(!ptrace) && p->ptrace && !ptrace_reparented(p))
 			return 0;
 
 		/*