[PATCH -mm] signal-turn-dequeue_signal_lock-into-kernel_dequeue_signal-fix

[Oleg Nesterov <oleg@redhat.com>]

Andrew,

As Markus reports (thanks!)

	signal-turn-dequeue_signal_lock-into-kernel_dequeue_signal.patch

conflicts with the recent change in Linus' tree,

> I just realised that this patch will conflict with a fixup patch for nbd
> that will be included in rc7.
>
> dcc909d90ccd (nbd: Add locking for tasks)
>
> I think there is basically one new instance of dequeue_signal_lock() that
> needs to be replaced with kernel_dequeue_signal().

Unless I missed something, this new dequeue_signal_lock() should simply
die, but lets fix the conflict first.


--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -592,10 +592,8 @@ static int nbd_thread_send(void *data)
 	spin_unlock_irqrestore(&nbd->tasks_lock, flags);
 
 	/* Clear maybe pending signals */
-	if (signal_pending(current)) {
-		siginfo_t info;
-		dequeue_signal_lock(current, &current->blocked, &info);
-	}
+	if (signal_pending(current))
+		kernel_dequeue_signal(NULL);
 
 	return 0;
 }