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signal: sys_pause() should check signal_pending()
author
Oleg Nesterov
<oleg@redhat.com>
Wed, 25 May 2011 17:22:27 +0000
(19:22 +0200)
committer
Oleg Nesterov
<oleg@redhat.com>
Wed, 25 May 2011 17:22:27 +0000
(19:22 +0200)
ERESTART* is always wrong without TIF_SIGPENDING. Teach sys_pause()
to handle the spurious wakeup correctly.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
kernel/signal.c
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diff --git
a/kernel/signal.c
b/kernel/signal.c
index
ad5e818
..
86c32b8
100644
(file)
--- 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;
}