From mboxrd@z Thu Jan  1 00:00:00 1970
From: Christoph Lameter <cl@linux.com>
Subject: Re: [Bugme-new] [Bug 33502] New: Caught 64-bit read from uninitialized
 memory in __alloc_skb
Date: Tue, 19 Apr 2011 12:10:40 -0500 (CDT)
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References: <bug-33502-10286@https.bugzilla.kernel.org/>  <20110418153852.153d3ed3.akpm@linux-foundation.org>  <1303181466.4152.39.camel@edumazet-laptop>  <1303182557.4152.48.camel@edumazet-laptop> <1303183217.4152.49.camel@edumazet-laptop>
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Cc: Andrew Morton <akpm@linux-foundation.org>, netdev@vger.kernel.org,
	bugzilla-daemon@bugzilla.kernel.org,
	bugme-daemon@bugzilla.kernel.org, casteyde.christian@free.fr,
	Vegard Nossum <vegardno@ifi.uio.no>,
	Pekka Enberg <penberg@kernel.org>
To: Eric Dumazet <eric.dumazet@gmail.com>
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On Tue, 19 Apr 2011, Eric Dumazet wrote:

>  	}
>  }
>
> -#ifdef CONFIG_CMPXCHG_LOCAL
> +#if defined(CONFIG_CMPXCHG_LOCAL) && \
> +	!defined(CONFIG_KMEMCHECK) && !defined(DEBUG_PAGEALLOC)
> +#define SLUB_USE_CMPXCHG_DOUBLE
> +#endif
> +
> +#ifdef SLUB_USE_CMPXCHG_DOUBLE
>  #ifdef CONFIG_PREEMPT
>  /*

Ugg.. Isnt there some way to indicate to kmemcheck that a speculative
access is occurring?