linux-kernel - Re: um: WARNING: at kernel/futex.c:786 __unqueue

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Date:	Thu, 17 Mar 2011 18:02:20 +0100
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	richard -rw- weinberger <richard.weinberger@...il.com>,
	laijs@...fujitsu.com, LKML <linux-kernel@...r.kernel.org>,
	user-mode-linux-devel@...ts.sourceforge.net, dvhart@...ux.intel.com
Subject: Re: um: WARNING: at kernel/futex.c:786 __unqueue_futex

Le jeudi 17 mars 2011 à 12:55 -0400, Steven Rostedt a écrit :
> Here, test this patch. I'm in the process of committing it now.
> It will be two patches, one for the WARN_ON_SMP() change, the other for
> the futex change.
> 
> -- Steve
> 
> diff --git a/include/asm-generic/bug.h b/include/asm-generic/bug.h
> index c2c9ba0..25f1e9e 100644
> --- a/include/asm-generic/bug.h
> +++ b/include/asm-generic/bug.h
> @@ -168,7 +168,7 @@ extern void warn_slowpath_null(const char *file, const int line);
>  #ifdef CONFIG_SMP
>  # define WARN_ON_SMP(x)			WARN_ON(x)
>  #else
> -# define WARN_ON_SMP(x)			do { } while (0)
> +# define WARN_ON_SMP(x)			({0;})
>  #endif
>  

You meant :

# define WARN_ON_SMP(x)			({x;})

or

# define WARN_ON_SMP(x)	  do { } while (x, 0)

?


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