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

From: David Miller <[email-masked]>
Date: Mon, 11 Apr 2011 23:25:43 -0700 (PDT)

From: Ingo Molnar <[email-masked]>
Date: Tue, 12 Apr 2011 08:20:02 +0200

> 
> * Stephen Rothwell <[email-masked]> wrote:
> 
>> Hi all,
>> 
>> After merging the final tree, today's linux-next build (sparc64 defconfig)
>> failed like this:
>> 
>> kernel/sched.c:7140: error: 'cpu_coregroup_mask' undeclared here (not in a function)
>> 
>> Caused by commit 2c402dc3bb50 ("sched: Unify the sched_domain build
>> functions").  On sparc64, cpu_coregroup_mask is a #define, not a function.
>> 
>> I applied tha patch below (idea stolen from s390) whcih could probably be
>> better.
>> 
>> From: Stephen Rothwell <[email-masked]>
>> Date: Tue, 12 Apr 2011 13:51:32 +1000
>> Subject: [PATCH] sched: fix sparc64 for sched_domain changes
>> 
>> Fixes this compile error:
>> 
>> kernel/sched.c:7140: error: 'cpu_coregroup_mask' undeclared here (not in a function)
>> 
>> Signed-off-by: Stephen Rothwell <[email-masked]>
>> ---
>>  arch/sparc/include/asm/topology_64.h |    6 +++++-
>>  1 files changed, 5 insertions(+), 1 deletions(-)
>> 
>> diff --git a/arch/sparc/include/asm/topology_64.h b/arch/sparc/include/asm/topology_64.h
>> index 1c79f32..16f477d 100644
>> --- a/arch/sparc/include/asm/topology_64.h
>> +++ b/arch/sparc/include/asm/topology_64.h
>> @@ -65,6 +65,10 @@ static inline int pcibus_to_node(struct pci_bus *pbus)
>>  #define smt_capable()				(sparc64_multi_core)
>>  #endif /* CONFIG_SMP */
>>  
>> -#define cpu_coregroup_mask(cpu)			(&cpu_core_map[cpu])
>> +extern cpumask_t cpu_core_map[NR_CPUS];
>> +static inline const struct cpumask *cpu_coregroup_mask(int cpu)
>> +{
>> +        return &cpu_core_map[cpu];
>> +}
> 
> Dave, if this change is fine with you i'd like to queue it up in 
> tip:sched/domains.

Yep, it's fine:

Acked-by: David S. Miller <[email-masked]>