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Date: Tue, 18 Sep 2007 17:07:33 -0700
From: Andrew Morton <akpm@linux-foundation.org>
To: Jeff Dike <jdike@addtoit.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
       LKML <linux-kernel@vger.kernel.org>,
       uml-devel <user-mode-linux-devel@lists.sourceforge.net>
Subject: Re: [PATCH] UML - Fix irqstack crash
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On Tue, 18 Sep 2007 19:33:36 -0400
Jeff Dike <jdike@addtoit.com> wrote:

> ===================================================================
> --- linux-2.6.17.orig/arch/um/os-Linux/signal.c	2007-09-09 11:15:37.000000000 -0400
> +++ linux-2.6.17/arch/um/os-Linux/signal.c	2007-09-18 12:32:40.000000000 -0400
> @@ -119,7 +119,7 @@ void (*handlers[_NSIG])(int sig, struct 
>  
>  void handle_signal(int sig, struct sigcontext *sc)
>  {
> -	unsigned long pending = 0;
> +	unsigned long pending = 1 << sig;

You want 1UL there.