linux-kernel - Re: linux-next: build failure after merge of the slab tree

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Message-ID: <1291911904.29040.4.camel@jaguar>
Date:	Thu, 09 Dec 2010 18:25:04 +0200
From:	Pekka Enberg <penberg@...nel.org>
To:	Stephen Rothwell <sfr@...b.auug.org.au>
Cc:	Christoph Lameter <cl@...ux-foundation.org>,
	linux-next@...r.kernel.org, linux-kernel@...r.kernel.org,
	Steven Rostedt <srostedt@...hat.com>,
	Richard Kennedy <richard@....demon.co.uk>
Subject: Re: linux-next: build failure after merge of the slab tree

On Thu, 2010-12-09 at 14:03 +1100, Stephen Rothwell wrote:
> Hi all,
> 
> After merging the slab tree, today's linux-next build (powerpc
> ppc64_defconfig) failed like this:
> 
> lib/built-in.o: In function `.zlib_inflate_blob':
> (.text+0x8640): undefined reference to `.kmem_cache_alloc_notrace'
> 
> This build failure went away when I removed the lib directory from the
> object tree and rebuilt.  So I guess we have an unexpressed dependency.

Did your config change from SLAB to SLUB or something?
lib/zlib_inflate/infutil.c includes <linux/slab.h> but if your config
changes, I'm guessing it doesn't work all that well if you change the
allocator because those tracing functions are in <linux/sl{a,u}b_def.h>.

			Pekka

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