The patch titled wait_task_stopped(): remove unneeded delay_group_leader check has been added to the -mm tree. Its filename is wait_task_stopped-remove-unneeded-delay_group_leader-check.patch *** Remember to use Documentation/SubmitChecklist when testing your code *** See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find out what to do about this ------------------------------------------------------ Subject: wait_task_stopped(): remove unneeded delay_group_leader check From: Oleg Nesterov <oleg@xxxxxxxxxx> wait_task_stopped() doesn't need the "delay_group_leader" parameter. If the child is not traced it must be a group leader. With or without subthreads ->group_stop_count == 0 when the whole task is stopped. Signed-off-by: Oleg Nesterov <oleg@xxxxxxxxxx> Cc: Mika Penttila <mika.penttila@xxxxxxxxxxx> Cc: Roland McGrath <roland@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- kernel/exit.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff -puN kernel/exit.c~wait_task_stopped-remove-unneeded-delay_group_leader-check kernel/exit.c --- a/kernel/exit.c~wait_task_stopped-remove-unneeded-delay_group_leader-check +++ a/kernel/exit.c @@ -1348,7 +1348,7 @@ static int wait_task_zombie(struct task_ * the lock and this task is uninteresting. If we return nonzero, we have * released the lock and the system call should return. */ -static int wait_task_stopped(struct task_struct *p, int delayed_group_leader, +static int wait_task_stopped(struct task_struct *p, int noreap, struct siginfo __user *infop, int __user *stat_addr, struct rusage __user *ru) { @@ -1362,8 +1362,7 @@ static int wait_task_stopped(struct task if (unlikely(!is_task_stopped_or_traced(p))) goto unlock_sig; - if (delayed_group_leader && !(p->ptrace & PT_PTRACED) && - p->signal->group_stop_count > 0) + if (!(p->ptrace & PT_PTRACED) && p->signal->group_stop_count > 0) /* * A group stop is in progress and this is the group leader. * We won't report until all threads have stopped. @@ -1519,7 +1518,7 @@ repeat: !(options & WUNTRACED)) continue; - retval = wait_task_stopped(p, ret == 2, + retval = wait_task_stopped(p, (options & WNOWAIT), infop, stat_addr, ru); } else if (p->exit_state == EXIT_ZOMBIE) { _ Patches currently in -mm which might be from oleg@xxxxxxxxxx are wait_task_stopped-dont-use-task_pid_nr_ns-lockless.patch proc-remove-races-from-proc_id_readdir.patch wait_task_stopped-pass-correct-exit_code-to.patch use-__set_task_state-for-traced-stopped-tasks.patch add-task_wakekill.patch do_wait-remove-one-else-if-branch.patch proc-implement-proc_single_file_operations.patch proc-rewrite-do_task_stat-to-correctly-handle-pid-namespaces.patch proc-seqfile-convert-proc_pid_statm.patch proc-proper-pidns-handling-for-proc-self.patch proc-fix-the-threaded-proc-self.patch kill-pt_attached.patch kill-my_ptrace_child.patch ptrace_check_attach-remove-unneeded-signal-=-null-check.patch ptrace_stop-fix-the-race-with-ptrace-detachattach.patch wait_task_stopped-simplify-and-fix-races-with-sigcont-sigkill-untrace.patch do_wait-factor-out-retval-=-0-checks.patch ptrace_stop-fix-racy-nonstop_code-setting.patch wait_task_stopped-remove-unneeded-delay_group_leader-check.patch - To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html