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

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Message-ID: <4C740450.3030000@cs.helsinki.fi>
Date:	Tue, 24 Aug 2010 20:41:36 +0300
From:	Pekka Enberg <penberg@...helsinki.fi>
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
Subject: Re: linux-next: build failure after merge of the final tree (slab
 tree related)

On 24.8.2010 5.07, Stephen Rothwell wrote:
> Hi all,
>
> After merging the final tree, today's linux-next build (powerpc
> allnoconfig) failed like this:
>
> mm/slub.c: In function 'alloc_kmem_cache_cpus':
> mm/slub.c:2094: error: 'PERCPU_DYNAMIC_EARLY_SIZE' undeclared (first use in this function)
> mm/slub.c:2094: error: (Each undeclared identifier is reported only once
> mm/slub.c:2094: error: for each function it appears in.)
> mm/slub.c:2094: error: bit-field '<anonymous>' width not an integer constant
>
> Caused by commit e18d65f0500b95d8724b17d8ea9f1116cf390bbe ("slub: Remove
> static kmem_cache_cpu array for boot"). PERCPU_DYNAMIC_EARLY_SIZE is only
> defined for SMP (and only in linux/percpu.h which is not explicitly
> included).  This build does not have CONFIG_SMP set.
>
> I have used the version of the slab tree from next-20100823 for today.

Thanks for the report. The problem should be fixed by this commit:

http://git.kernel.org/?p=linux/kernel/git/penberg/slab-2.6.git;a=commitdiff;h=5792949c540c9fd719c3fc0d6edc97374222e792
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