Oleg Nesterov 8677347378
make do_notify_parent() __must_check, update the callers ...
Change other callers of do_notify_parent() to check the value it
returns, this makes the subsequent task_detached() unnecessary.
Mark do_notify_parent() as __must_check.
Use thread_group_leader() instead of !task_detached() to check
if we need to notify the real parent in wait_task_zombie().
Remove the stale comment in release_task(). "just for sanity" is
no longer true, we have to set EXIT_DEAD to avoid the races with
do_wait().
Signed-off-by: Oleg Nesterov <oleg@redhat.com >
Acked-by: Tejun Heo <tj@kernel.org >
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