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drivers base/arch_topology: allow inlining cpu-invariant accounting support 

Allow inlining of topology_get_cpu_scale() into the task
scheduler fast path (e.g. __update_load_avg_se()) by coding it as a
static inline function in the arch topology header file.

Signed-off-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Dietmar Eggemann 2017-09-26 17:41:11 +01:00 committed by Rafael J. Wysocki
parent 0e27c567d1
commit 8216f588b5
2 changed files with 8 additions and 7 deletions
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7
drivers/base/arch_topology.c
View File

@ -37,12 +37,7 @@ void arch_set_freq_scale(struct cpumask *cpus, unsigned long cur_freq,
} }
static DEFINE_MUTEX(cpu_scale_mutex); static DEFINE_MUTEX(cpu_scale_mutex);
static DEFINE_PER_CPU(unsigned long, cpu_scale) = SCHED_CAPACITY_SCALE; DEFINE_PER_CPU(unsigned long, cpu_scale) = SCHED_CAPACITY_SCALE;
unsigned long topology_get_cpu_scale(struct sched_domain *sd, int cpu)
{
return per_cpu(cpu_scale, cpu);
}
void topology_set_cpu_scale(unsigned int cpu, unsigned long capacity) void topology_set_cpu_scale(unsigned int cpu, unsigned long capacity)
{ {

8
include/linux/arch_topology.h
View File

@ -12,8 +12,14 @@ void topology_normalize_cpu_scale(void);
struct device_node; struct device_node;
bool topology_parse_cpu_capacity(struct device_node *cpu_node, int cpu); bool topology_parse_cpu_capacity(struct device_node *cpu_node, int cpu);
DECLARE_PER_CPU(unsigned long, cpu_scale);
struct sched_domain; struct sched_domain;
unsigned long topology_get_cpu_scale(struct sched_domain *sd, int cpu); static inline
unsigned long topology_get_cpu_scale(struct sched_domain *sd, int cpu)
{
return per_cpu(cpu_scale, cpu);
}
void topology_set_cpu_scale(unsigned int cpu, unsigned long capacity); void topology_set_cpu_scale(unsigned int cpu, unsigned long capacity);