linux-kernel - Re: [PATCH 9/9] slab: remove a useless lockdep annotation

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Date:	Fri, 14 Feb 2014 12:49:57 -0600 (CST)
From:	Christoph Lameter <cl@...ux.com>
To:	Joonsoo Kim <iamjoonsoo.kim@....com>
cc:	Pekka Enberg <penberg@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	David Rientjes <rientjes@...gle.com>,
	Wanpeng Li <liwanp@...ux.vnet.ibm.com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, Joonsoo Kim <js1304@...il.com>
Subject: Re: [PATCH 9/9] slab: remove a useless lockdep annotation

On Fri, 14 Feb 2014, Joonsoo Kim wrote:

> @@ -921,7 +784,7 @@ static int transfer_objects(struct array_cache *to,
>  static inline struct alien_cache **alloc_alien_cache(int node,
>  						int limit, gfp_t gfp)
>  {
> -	return (struct alien_cache **)BAD_ALIEN_MAGIC;
> +	return NULL;
>  }
>

Why change the BAD_ALIEN_MAGIC?

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