[PATCH] do_wait_for_common: use signal_pending_state()

[Oleg Nesterov]

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

Signed-off-by: Oleg Nesterov <oleg@xxxxxxxxxx>

--- 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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