Re: [PATCH 3/6] x86: Convert cpu_sibling_map to be a per cpu variable (v2)

[Andrew Morton <akpm@linux-foundation.org>]

On Fri, 24 Aug 2007 15:26:57 -0700 travis@sgi.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 *'