The patch titled
signal: introduce retarget_shared_pending()
has been added to the -mm tree. Its filename is
signal-introduce-retarget_shared_pending.patch
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------------------------------------------------------
Subject: signal: introduce retarget_shared_pending()
From: Oleg Nesterov <oleg@xxxxxxxxxx>
No functional changes. Move the notyfy-other-threads code from
exit_signals() to the new helper, retarget_shared_pending().
Signed-off-by: Oleg Nesterov <oleg@xxxxxxxxxx>
Cc: Tejun Heo <tj@xxxxxxxxxx>
Cc: "Nikita V. Youshchenko" <nyoushchenko@xxxxxxxxxx>
Cc: Matt Fleming <matt@xxxxxxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/signal.c | 26 +++++++++++++++++---------
1 file changed, 17 insertions(+), 9 deletions(-)
diff -puN kernel/signal.c~signal-introduce-retarget_shared_pending kernel/signal.c
--- a/kernel/signal.c~signal-introduce-retarget_shared_pending
+++ a/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 *ts
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))
_
Patches currently in -mm which might be from oleg@xxxxxxxxxx are
linux-next.patch
signal-introduce-retarget_shared_pending.patch
signal-retarget_shared_pending-consider-shared-unblocked-signals-only.patch
signal-sigprocmask-narrow-the-scope-of-sigloc.patch
signal-sigprocmask-should-do-retarget_shared_pending.patch
x86-signal-handle_signal-should-use-sigprocmask.patch
x86-signal-sys_rt_sigreturn-should-use-sigprocmask.patch
fs-execc-provide-the-correct-process-pid-to-the-pipe-helper.patch
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