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>

1 files changed, 3 insertions, 0 deletions

diff --git a/kernel/signal.c b/kernel/signal.c
index ccf1ceedaebe..136ba2ddc1d6 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -519,6 +519,9 @@ void signal_wake_up(struct task_struct *t, int resume)
 
         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