ptrace: wait_consider_task: s/same_thread_group/ptrace_reparented/

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>
Acked-by: Tejun Heo <tj@kernel.org>

1 files changed, 1 insertions, 2 deletions

diff --git a/kernel/exit.c b/kernel/exit.c
index 9fa99702645d..b8d3b47bb881 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -1599,8 +1599,7 @@ static int wait_consider_task(struct wait_opts *wo, int ptrace,
                  * 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;
 
                 /*