linux-kernel - Re: linux-next: build warning after merge of the final tree (slab tree related)

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Date:	Wed, 19 Sep 2012 09:57:58 +0300 (EEST)
From:	Pekka Enberg <penberg@...nel.org>
To:	Christoph Lameter <cl@...ux.com>
cc:	Stephen Rothwell <sfr@...b.auug.org.au>,
	Pekka Enberg <penberg@...helsinki.fi>,
	linux-next@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: linux-next: build warning after merge of the final tree (slab
 tree related)

On Tue, 11 Sep 2012, Christoph Lameter wrote:

> On Tue, 11 Sep 2012, Stephen Rothwell wrote:
> 
> > After merging the final tree, today's linux-next build (sparc64 defconfig)
> > produced this warning:
> >
> > mm/slab.c:808:13: warning: '__slab_error' defined but not used [-Wunused-function]
> >
> > Introduced by commit 945cf2b6199b ("mm/sl[aou]b: Extract a common function for kmem_cache_destroy").  All uses of slab_error() are now guarded by DEBUG.
> 
> 
> Subject: Slab: Only define slab_error for DEBUG
> 
> There is no use case left for slab builds without DEBUG.
> 
> Signed-off-by: Christoph Lameter <cl@...ux.com>
> 
> Index: linux/mm/slab.c
> ===================================================================
> --- linux.orig/mm/slab.c	2012-09-11 14:44:56.304015235 -0500
> +++ linux/mm/slab.c	2012-09-11 14:48:46.988948440 -0500
> @@ -803,6 +803,7 @@ static void cache_estimate(unsigned long
>  	*left_over = slab_size - nr_objs*buffer_size - mgmt_size;
>  }
> 
> +#if DEBUG
>  #define slab_error(cachep, msg) __slab_error(__func__, cachep, msg)
> 
>  static void __slab_error(const char *function, struct kmem_cache *cachep,
> @@ -812,6 +813,7 @@ static void __slab_error(const char *fun
>  	       function, cachep->name, msg);
>  	dump_stack();
>  }
> +#endif
> 
>  /*
>   * By default on NUMA we use alien caches to stage the freeing of
> 

Applied, thanks.

P.S. Guys, please use penberg@...nel.org email address. I missed this 
patch because I don't read this mailbox.

			Pekka
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