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| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2012-01-26 12:44:34 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2012-01-27 13:28:48 +0100 |
| commit | 39be350127ec60a078edffe5b4915dafba4ba514 (patch) | |
| tree | 9b1ad6ee75c3b5842434b697b96ccdfbe1a40a2f /include | |
| parent | cb297a3e433dbdcf7ad81e0564e7b804c941ff0d (diff) | |
| download | linux-39be350127ec60a078edffe5b4915dafba4ba514.tar.gz linux-39be350127ec60a078edffe5b4915dafba4ba514.tar.bz2 linux-39be350127ec60a078edffe5b4915dafba4ba514.zip | |
sched, block: Unify cache detection
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
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/sched.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h index 513f52459872..0e1959568836 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -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 */ |