Messages in this thread Patch in this message | | | From | Ionela Voinescu <> | Subject | [PATCH 1/2] cpufreq,arm,arm64: restructure definitions of arch_set_freq_scale() | Date | Thu, 24 Sep 2020 13:30:15 +0100 |
| |
Compared to other arch_* functions, arch_set_freq_scale() has an atypical weak definition that can be replaced by a strong architecture specific implementation.
The more typical support for architectural functions involves defining an empty stub in a header file if the symbol is not already defined in architecture code. Some examples involve: - #define arch_scale_freq_capacity topology_get_freq_scale - #define arch_scale_freq_invariant topology_scale_freq_invariant - #define arch_scale_cpu_capacity topology_get_cpu_scale - #define arch_update_cpu_topology topology_update_cpu_topology - #define arch_scale_thermal_pressure topology_get_thermal_pressure - #define arch_set_thermal_pressure topology_set_thermal_pressure
Bring arch_set_freq_scale() in line with these functions by renaming it to topology_set_freq_scale() in the arch topology driver, and by defining the arch_set_freq_scale symbol to point to the new function for arm and arm64.
While there are other users of the arch_topology driver, this patch defines arch_set_freq_scale for arm and arm64 only, due to their existing definitions of arch_scale_freq_capacity. This is the getter function of the frequency invariance scale factor and without a getter function, the setter function - arch_set_freq_scale() has not purpose.
Signed-off-by: Ionela Voinescu <ionela.voinescu@arm.com> Cc: Russell King <linux@armlinux.org.uk> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will@kernel.org> --- arch/arm/include/asm/topology.h | 1 + arch/arm64/include/asm/topology.h | 1 + drivers/base/arch_topology.c | 4 ++-- drivers/cpufreq/cpufreq.c | 7 ------- include/linux/arch_topology.h | 2 ++ include/linux/cpufreq.h | 11 ++++++++--- 6 files changed, 14 insertions(+), 12 deletions(-)
diff --git a/arch/arm/include/asm/topology.h b/arch/arm/include/asm/topology.h index 9219e67befbe..e5e3d5ce4d55 100644 --- a/arch/arm/include/asm/topology.h +++ b/arch/arm/include/asm/topology.h @@ -8,6 +8,7 @@ #include <linux/arch_topology.h> /* Replace task scheduler's default frequency-invariant accounting */ +#define arch_set_freq_scale topology_set_freq_scale #define arch_scale_freq_capacity topology_get_freq_scale #define arch_scale_freq_invariant topology_scale_freq_invariant diff --git a/arch/arm64/include/asm/topology.h b/arch/arm64/include/asm/topology.h index 7cb519473fbd..11a465243f66 100644 --- a/arch/arm64/include/asm/topology.h +++ b/arch/arm64/include/asm/topology.h @@ -26,6 +26,7 @@ void topology_scale_freq_tick(void); #endif /* CONFIG_ARM64_AMU_EXTN */ /* Replace task scheduler's default frequency-invariant accounting */ +#define arch_set_freq_scale topology_set_freq_scale #define arch_scale_freq_capacity topology_get_freq_scale #define arch_scale_freq_invariant topology_scale_freq_invariant diff --git a/drivers/base/arch_topology.c b/drivers/base/arch_topology.c index 1705c772c273..ae5a596bcf86 100644 --- a/drivers/base/arch_topology.c +++ b/drivers/base/arch_topology.c @@ -33,8 +33,8 @@ __weak bool arch_freq_counters_available(const struct cpumask *cpus) } DEFINE_PER_CPU(unsigned long, freq_scale) = SCHED_CAPACITY_SCALE; -void arch_set_freq_scale(const struct cpumask *cpus, unsigned long cur_freq, - unsigned long max_freq) +void topology_set_freq_scale(const struct cpumask *cpus, unsigned long cur_freq, + unsigned long max_freq) { unsigned long scale; int i; diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index 2ea245a6c0c0..f34d3a3d5ba6 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -160,13 +160,6 @@ 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(const struct cpumask *cpus, - unsigned long cur_freq, - unsigned long max_freq) -{ -} -EXPORT_SYMBOL_GPL(arch_set_freq_scale); - /* * This is a generic cpufreq init() routine which can be used by cpufreq * drivers of SMP systems. It will do following: diff --git a/include/linux/arch_topology.h b/include/linux/arch_topology.h index 083df331a3c9..0f6cd6b73a61 100644 --- a/include/linux/arch_topology.h +++ b/include/linux/arch_topology.h @@ -30,6 +30,8 @@ static inline unsigned long topology_get_freq_scale(int cpu) return per_cpu(freq_scale, cpu); } +void topology_set_freq_scale(const struct cpumask *cpus, unsigned long cur_freq, + unsigned long max_freq); bool topology_scale_freq_invariant(void); bool arch_freq_counters_available(const struct cpumask *cpus); diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h index 9f779fbdbe7b..fa37b1c66443 100644 --- a/include/linux/cpufreq.h +++ b/include/linux/cpufreq.h @@ -1011,9 +1011,14 @@ 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(const struct cpumask *cpus, - unsigned long cur_freq, - unsigned long max_freq); +#ifndef arch_set_freq_scale +static __always_inline +void arch_set_freq_scale(const struct cpumask *cpus, + unsigned long cur_freq, + unsigned long max_freq) +{ +} +#endif /* the following are really really optional */ extern struct freq_attr cpufreq_freq_attr_scaling_available_freqs; -- 2.17.1
| |