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| author | Valentin Schneider <valentin.schneider@arm.com> | 2020-07-12 17:59:15 +0100 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2020-07-22 10:22:05 +0200 |
| commit | 25980c7a79af42f2daa73e2f475ebf4cbac8253e (patch) | |
| tree | e22a255eca9698525da7ea6e9de531bfefcf1f6b /drivers/base/arch_topology.c | |
| parent | 2705937a0395bd15d515a2a302d26ebc8318c035 (diff) | |
arch_topology, sched/core: Cleanup thermal pressure definition
The following commit:
14533a16c46d ("thermal/cpu-cooling, sched/core: Move the arch_set_thermal_pressure() API to generic scheduler code")
moved the definition of arch_set_thermal_pressure() to sched/core.c, but
kept its declaration in linux/arch_topology.h. When building e.g. an x86
kernel with CONFIG_SCHED_THERMAL_PRESSURE=y, cpufreq_cooling.c ends up
getting the declaration of arch_set_thermal_pressure() from
include/linux/arch_topology.h, which is somewhat awkward.
On top of this, sched/core.c unconditionally defines
o The thermal_pressure percpu variable
o arch_set_thermal_pressure()
while arch_scale_thermal_pressure() does nothing unless redefined by the
architecture.
arch_*() functions are meant to be defined by architectures, so revert the
aforementioned commit and re-implement it in a way that keeps
arch_set_thermal_pressure() architecture-definable, and doesn't define the
thermal pressure percpu variable for kernels that don't need
it (CONFIG_SCHED_THERMAL_PRESSURE=n).
Signed-off-by: Valentin Schneider <valentin.schneider@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20200712165917.9168-2-valentin.schneider@arm.com
Diffstat (limited to 'drivers/base/arch_topology.c')
| -rw-r--r-- | drivers/base/arch_topology.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/base/arch_topology.c b/drivers/base/arch_topology.c index 4d0a0038b476..75f72d684294 100644 --- a/drivers/base/arch_topology.c +++ b/drivers/base/arch_topology.c @@ -54,6 +54,17 @@ void topology_set_cpu_scale(unsigned int cpu, unsigned long capacity) per_cpu(cpu_scale, cpu) = capacity; } +DEFINE_PER_CPU(unsigned long, thermal_pressure); + +void topology_set_thermal_pressure(const struct cpumask *cpus, + unsigned long th_pressure) +{ + int cpu; + + for_each_cpu(cpu, cpus) + WRITE_ONCE(per_cpu(thermal_pressure, cpu), th_pressure); +} + static ssize_t cpu_capacity_show(struct device *dev, struct device_attribute *attr, char *buf) |