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| author | Oleg Nesterov <oleg@redhat.com> | 2011-04-27 19:17:37 +0200 |
|---|---|---|
| committer | Oleg Nesterov <oleg@redhat.com> | 2011-04-28 13:01:35 +0200 |
| commit | 0edceb7bcd82802f721f3c94eed9b3e2869d3740 (patch) | |
| tree | ef24801563d721a2823d6c863d3d68f20ce39857 /kernel/signal.c | |
| parent | e46bc9b6fd65bc9f406a4211fbf95683cc9c2937 (diff) | |
| download | lwn-0edceb7bcd82802f721f3c94eed9b3e2869d3740.tar.gz lwn-0edceb7bcd82802f721f3c94eed9b3e2869d3740.zip | |
signal: introduce retarget_shared_pending()
No functional changes. Move the notify-other-threads code from exit_signals()
to the new helper, retarget_shared_pending().
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Reviewed-by: Matt Fleming <matt.fleming@linux.intel.com>
Acked-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'kernel/signal.c')
| -rw-r--r-- | kernel/signal.c | 26 |
1 files changed, 17 insertions, 9 deletions
diff --git a/kernel/signal.c b/kernel/signal.c index c15e9792b088..5341e2141904 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -2198,10 +2198,25 @@ relock: return signr; } +/* + * It could be that complete_signal() picked us to notify about the + * group-wide signal. Another thread should be notified now to take + * the signal since we will not. + */ +static void retarget_shared_pending(struct task_struct *tsk) +{ + struct task_struct *t; + + t = tsk; + while_each_thread(tsk, t) { + if (!signal_pending(t) && !(t->flags & PF_EXITING)) + recalc_sigpending_and_wake(t); + } +} + void exit_signals(struct task_struct *tsk) { int group_stop = 0; - struct task_struct *t; if (thread_group_empty(tsk) || signal_group_exit(tsk->signal)) { tsk->flags |= PF_EXITING; @@ -2217,14 +2232,7 @@ void exit_signals(struct task_struct *tsk) if (!signal_pending(tsk)) goto out; - /* - * It could be that __group_complete_signal() choose us to - * notify about group-wide signal. Another thread should be - * woken now to take the signal since we will not. - */ - for (t = tsk; (t = next_thread(t)) != tsk; ) - if (!signal_pending(t) && !(t->flags & PF_EXITING)) - recalc_sigpending_and_wake(t); + retarget_shared_pending(tsk); if (unlikely(tsk->group_stop & GROUP_STOP_PENDING) && task_participate_group_stop(tsk)) |