Change do_wait_for_common() to use signal_pending_state() instead of
open coding.

Signed-off-by: Oleg Nesterov

--- 26-rc2/kernel/sched.c~1_SPS_WAIT_FOR 2008-07-22 18:36:58.000000000 +0400
+++ 26-rc2/kernel/sched.c 2008-07-24 19:54:12.000000000 +0400
@@ -4735,10 +4735,7 @@ do_wait_for_common(struct completion *x,
wait.flags |= WQ_FLAG_EXCLUSIVE;
__add_wait_queue_tail(&x->wait, &wait);
do {
- if ((state == TASK_INTERRUPTIBLE &&
- signal_pending(current)) ||
- (state == TASK_KILLABLE &&
- fatal_signal_pending(current))) {
+ if (signal_pending_state(state, current)) {
timeout = -ERESTARTSYS;
break;
}

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