diff options
author | Jon Medhurst <tixy@linaro.org> | 2012-10-12 13:45:35 +0100 |
---|---|---|
committer | Viresh Kumar <viresh.kumar@linaro.org> | 2012-10-12 19:49:59 +0530 |
commit | 004bd61ea2a665d342ee9cd5ef6e8f396781fe5a (patch) | |
tree | 68e0cf04d49799d23c06804b2aa10b08290f261f | |
parent | 2e91a21772260ab89fc7b30c535233b2641520d8 (diff) |
ARM: sched: Avoid empty 'slow' HMP domain
On homogeneous (non-heterogeneous) systems all CPUs will be declared
'fast' and the slow cpu list will be empty. In this situation we need to
avoid adding an empty slow HMP domain otherwise the scheduler code will
blow up when it attempts to move a task to the slow domain.
Signed-off-by: Jon Medhurst <tixy@linaro.org>
-rw-r--r-- | arch/arm/kernel/topology.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/arch/arm/kernel/topology.c b/arch/arm/kernel/topology.c index ec8ad5c3a5a..be3dae1cfa7 100644 --- a/arch/arm/kernel/topology.c +++ b/arch/arm/kernel/topology.c @@ -396,10 +396,12 @@ void __init arch_get_hmp_domains(struct list_head *hmp_domains_list) * Must be ordered with respect to compute capacity. * Fastest domain at head of list. */ - domain = (struct hmp_domain *) - kmalloc(sizeof(struct hmp_domain), GFP_KERNEL); - cpumask_copy(&domain->cpus, &hmp_slow_cpu_mask); - list_add(&domain->hmp_domains, hmp_domains_list); + if(!cpumask_empty(&hmp_slow_cpu_mask)) { + domain = (struct hmp_domain *) + kmalloc(sizeof(struct hmp_domain), GFP_KERNEL); + cpumask_copy(&domain->cpus, &hmp_slow_cpu_mask); + list_add(&domain->hmp_domains, hmp_domains_list); + } domain = (struct hmp_domain *) kmalloc(sizeof(struct hmp_domain), GFP_KERNEL); cpumask_copy(&domain->cpus, &hmp_fast_cpu_mask); |