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sched, block: Unify cache detection

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The block layer has some code trying to determine if two CPUs share a
cache, the scheduler has a similar function. Expose the function used
by the scheduler and make the block layer use it, thereby removing the
block layers usage of CONFIG_SCHED* and topology bits.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Jens Axboe <axboe@kernel.dk>
Link: http://lkml.kernel.org/r/1327579450.2446.95.camel@twins
This commit is contained in:
Peter Zijlstra 2012-01-26 12:44:34 +01:00 • committed by Ingo Molnar
parent cb297a3e43
commit 39be350127
4 changed files with 19 additions and 27 deletions
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8
include/linux/sched.h
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@ -1052,6 +1052,8 @@ static inline int test_sd_parent(struct sched_domain *sd, int flag)
unsigned long default_scale_freq_power(struct sched_domain *sd, int cpu);
unsigned long default_scale_smt_power(struct sched_domain *sd, int cpu);
bool cpus_share_cache(int this_cpu, int that_cpu);
#else /* CONFIG_SMP */
struct sched_domain_attr;
@ -1061,6 +1063,12 @@ partition_sched_domains(int ndoms_new, cpumask_var_t doms_new[],
struct sched_domain_attr *dattr_new)
{
}
static inline bool cpus_share_cache(int this_cpu, int that_cpu)
{
return true;
}
#endif /* !CONFIG_SMP */