arch_topology: Rename freq_scale as arch_freq_scale

Rename freq_scale to a less generic name, as it will get exported soon
for modules. Since x86 already names its own implementation of this as
arch_freq_scale, lets stick to that.
Suggested-by: Will Deacon <will@kernel.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>

arch/arm64/kernel/topology.c

@@ -256,8 +256,8 @@ static int init_amu_fie_callback(struct notifier_block *nb, unsigned long val,
 	 * initialized AMU support and enabled invariance. The AMU counters will
 	 * keep on working just fine in the absence of the cpufreq driver, and
 	 * for the CPUs for which there are no counters available, the last set
-	 * value of freq_scale will remain valid as that is the frequency those
-	 * CPUs are running at.
+	 * value of arch_freq_scale will remain valid as that is the frequency
+	 * those CPUs are running at.
 	 */
 
 	return 0;
@@ -327,7 +327,7 @@ void topology_scale_freq_tick(void)
 			  const_cnt - prev_const_cnt);
 
 	scale = min_t(unsigned long, scale, SCHED_CAPACITY_SCALE);
-	this_cpu_write(freq_scale, (unsigned long)scale);
+	this_cpu_write(arch_freq_scale, (unsigned long)scale);
 }
 
 #ifdef CONFIG_ACPI_CPPC_LIB

drivers/base/arch_topology.c

@@ -31,7 +31,7 @@ __weak bool arch_freq_counters_available(const struct cpumask *cpus)
 {
 	return false;
 }
-DEFINE_PER_CPU(unsigned long, freq_scale) = SCHED_CAPACITY_SCALE;
+DEFINE_PER_CPU(unsigned long, arch_freq_scale) = SCHED_CAPACITY_SCALE;
 
 void topology_set_freq_scale(const struct cpumask *cpus, unsigned long cur_freq,
 			     unsigned long max_freq)
@@ -53,7 +53,7 @@ void topology_set_freq_scale(const struct cpumask *cpus, unsigned long cur_freq,
 	scale = (cur_freq << SCHED_CAPACITY_SHIFT) / max_freq;
 
 	for_each_cpu(i, cpus)
-		per_cpu(freq_scale, i) = scale;
+		per_cpu(arch_freq_scale, i) = scale;
 }
 
 DEFINE_PER_CPU(unsigned long, cpu_scale) = SCHED_CAPACITY_SCALE;

include/linux/arch_topology.h

@@ -23,11 +23,11 @@ static inline unsigned long topology_get_cpu_scale(int cpu)
 
 void topology_set_cpu_scale(unsigned int cpu, unsigned long capacity);
 
-DECLARE_PER_CPU(unsigned long, freq_scale);
+DECLARE_PER_CPU(unsigned long, arch_freq_scale);
 
 static inline unsigned long topology_get_freq_scale(int cpu)
 {
-	return per_cpu(freq_scale, cpu);
+	return per_cpu(arch_freq_scale, cpu);
 }
 
 void topology_set_freq_scale(const struct cpumask *cpus, unsigned long cur_freq,