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arch_topology, cpufreq: constify arch_* cpumasks

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The passed cpumask arguments to arch_set_freq_scale() and
arch_freq_counters_available() are only iterated over, so reflect this
in the prototype. This also allows to pass system cpumasks like
cpu_online_mask without getting a warning.

Signed-off-by: Valentin Schneider <valentin.schneider@arm.com>
Signed-off-by: Ionela Voinescu <ionela.voinescu@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Valentin Schneider 2020-09-01 21:55:48 +01:00 committed by Rafael J. Wysocki
parent 874f635310
commit ecddc3a0d5
5 changed files with 9 additions and 7 deletions
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2
arch/arm64/kernel/topology.c
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@ -253,7 +253,7 @@ free_valid_mask:
}
late_initcall_sync(init_amu_fie);
bool arch_freq_counters_available(struct cpumask *cpus)
bool arch_freq_counters_available(const struct cpumask *cpus)
{
return amu_freq_invariant() &&
cpumask_subset(cpus, amu_fie_cpus);

4
drivers/base/arch_topology.c
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@ -21,13 +21,13 @@
#include <linux/sched.h>
#include <linux/smp.h>
__weak bool arch_freq_counters_available(struct cpumask *cpus)
__weak bool arch_freq_counters_available(const struct cpumask *cpus)
{
return false;
}
DEFINE_PER_CPU(unsigned long, freq_scale) = SCHED_CAPACITY_SCALE;
void arch_set_freq_scale(struct cpumask *cpus, unsigned long cur_freq,
void arch_set_freq_scale(const struct cpumask *cpus, unsigned long cur_freq,
unsigned long max_freq)
{
unsigned long scale;

5
drivers/cpufreq/cpufreq.c
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@ -160,8 +160,9 @@ u64 get_cpu_idle_time(unsigned int cpu, u64 *wall, int io_busy)
}
EXPORT_SYMBOL_GPL(get_cpu_idle_time);
__weak void arch_set_freq_scale(struct cpumask *cpus, unsigned long cur_freq,
unsigned long max_freq)
__weak void arch_set_freq_scale(const struct cpumask *cpus,
unsigned long cur_freq,
unsigned long max_freq)
{
}
EXPORT_SYMBOL_GPL(arch_set_freq_scale);

2
include/linux/arch_topology.h
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@ -30,7 +30,7 @@ static inline unsigned long topology_get_freq_scale(int cpu)
return per_cpu(freq_scale, cpu);
}
bool arch_freq_counters_available(struct cpumask *cpus);
bool arch_freq_counters_available(const struct cpumask *cpus);
DECLARE_PER_CPU(unsigned long, thermal_pressure);

3
include/linux/cpufreq.h
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@ -1011,7 +1011,8 @@ static inline void sched_cpufreq_governor_change(struct cpufreq_policy *policy,
extern void arch_freq_prepare_all(void);
extern unsigned int arch_freq_get_on_cpu(int cpu);
extern void arch_set_freq_scale(struct cpumask *cpus, unsigned long cur_freq,
extern void arch_set_freq_scale(const struct cpumask *cpus,
unsigned long cur_freq,
unsigned long max_freq);
/* the following are really really optional */