linux/debian/patches/features/all/rt/signals-do-not-wake-self.patch

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Diff

From: Thomas Gleixner <tglx@linutronix.de>
Date: Fri, 3 Jul 2009 08:44:44 -0500
Subject: signals: Do not wakeup self
Signals which are delivered by current to current can do without
waking up current :)
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
kernel/signal.c | 3 +++
1 file changed, 3 insertions(+)
Index: linux-3.4/kernel/signal.c
===================================================================
--- linux-3.4.orig/kernel/signal.c
+++ linux-3.4/kernel/signal.c
@@ -683,6 +683,9 @@ void signal_wake_up(struct task_struct *
set_tsk_thread_flag(t, TIF_SIGPENDING);
+ if (unlikely(t == current))
+ return;
+
/*
* For SIGKILL, we want to wake it up in the stopped/traced/killable
* case. We don't check t->state here because there is a race with it