linux-kernel - Re: [PATCH 3/6] x86: Convert cpu_sibling

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Date:	Fri, 31 Aug 2007 19:49:03 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	travis@....com
Cc:	Andi Kleen <ak@...e.de>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, Christoph Lameter <clameter@....com>
Subject: Re: [PATCH 3/6] x86: Convert cpu_sibling_map to be a per cpu
 variable (v2)

On Fri, 24 Aug 2007 15:26:57 -0700 travis@....com wrote:

> Convert cpu_sibling_map from a static array sized by NR_CPUS to a
> per_cpu variable.  This saves sizeof(cpumask_t) * NR unused cpus.
> Access is mostly from startup and CPU HOTPLUG functions.

ia64 allmodconfig:

kernel/sched.c: In function `cpu_to_phys_group':                                                                             kernel/sched.c:5937: error: `per_cpu__cpu_sibling_map' undeclared (first use in this function)                               kernel/sched.c:5937: error: (Each undeclared identifier is reported only once
kernel/sched.c:5937: error: for each function it appears in.)                                                                kernel/sched.c:5937: warning: type defaults to `int' in declaration of `type name'
kernel/sched.c:5937: error: invalid type argument of `unary *'                                                               kernel/sched.c: In function `build_sched_domains':                                                                           kernel/sched.c:6172: error: `per_cpu__cpu_sibling_map' undeclared (first use in this function)                               kernel/sched.c:6172: warning: type defaults to `int' in declaration of `type name'                                           kernel/sched.c:6172: error: invalid type argument of `unary *'                                                               kernel/sched.c:6183: warning: type defaults to `int' in declaration of `type name'                                           kernel/sched.c:6183: error: invalid type argument of `unary *'                                                               
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