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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@ -2160,7 +2160,7 @@ extern int kill_pid_info_as_uid(int, struct siginfo *, struct pid *, uid_t, uid_
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extern int kill_pgrp(struct pid *pid, int sig, int priv);
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extern int kill_pid(struct pid *pid, int sig, int priv);
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extern int kill_proc_info(int, struct siginfo *, pid_t);
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extern bool do_notify_parent(struct task_struct *, int);
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extern __must_check bool do_notify_parent(struct task_struct *, int);
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extern void __wake_up_parent(struct task_struct *p, struct task_struct *parent);
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extern void force_sig(int, struct task_struct *);
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extern int send_sig(int, struct task_struct *, int);
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