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authorOleg Nesterov <oleg@redhat.com>2011-05-25 19:22:27 +0200
committerOleg Nesterov <oleg@redhat.com>2011-05-25 19:22:27 +0200
commitd92fcf0552a15891b25c343cee340d295e24109c (patch)
treead43a9c62d926f223d699544bcef4695af4f3e9d
parent0666fb51b1483f27506e212cc7f7b2645b5c7acc (diff)
downloadlinux-d92fcf0552a15891b25c343cee340d295e24109c.tar.bz2
signal: sys_pause() should check signal_pending()
ERESTART* is always wrong without TIF_SIGPENDING. Teach sys_pause() to handle the spurious wakeup correctly. Signed-off-by: Oleg Nesterov <oleg@redhat.com>
-rw-r--r--kernel/signal.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/kernel/signal.c b/kernel/signal.c
index ad5e818baacc..86c32b884f8e 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -3023,8 +3023,10 @@ SYSCALL_DEFINE2(signal, int, sig, __sighandler_t, handler)
SYSCALL_DEFINE0(pause)
{
- current->state = TASK_INTERRUPTIBLE;
- schedule();
+ while (!signal_pending(current)) {
+ current->state = TASK_INTERRUPTIBLE;
+ schedule();
+ }
return -ERESTARTNOHAND;
}