[CPUFREQ] change cpu freq tables to per_cpu variables
Mike Travis [Wed, 5 Mar 2008 16:31:29 +0000 (08:31 -0800)]
Change cpufreq tables from arrays to per_cpu variables in
drivers/acpi/processor_thermal.c

Based on git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git

Cc: Len Brown <len.brown@intel.com>
Signed-off-by: Mike Travis <travis@sgi.com>
Signed-off-by: Dave Jones <davej@codemonkey.org.uk>

drivers/acpi/processor_thermal.c

index 9cb43f5..649ae99 100644 (file)
@@ -97,7 +97,7 @@ static int acpi_processor_apply_limit(struct acpi_processor *pr)
 #define CPUFREQ_THERMAL_MIN_STEP 0
 #define CPUFREQ_THERMAL_MAX_STEP 3
 
-static unsigned int cpufreq_thermal_reduction_pctg[NR_CPUS];
+static DEFINE_PER_CPU(unsigned int, cpufreq_thermal_reduction_pctg);
 static unsigned int acpi_thermal_cpufreq_is_init = 0;
 
 static int cpu_has_cpufreq(unsigned int cpu)
@@ -113,9 +113,9 @@ static int acpi_thermal_cpufreq_increase(unsigned int cpu)
        if (!cpu_has_cpufreq(cpu))
                return -ENODEV;
 
-       if (cpufreq_thermal_reduction_pctg[cpu] <
+       if (per_cpu(cpufreq_thermal_reduction_pctg, cpu) <
                CPUFREQ_THERMAL_MAX_STEP) {
-               cpufreq_thermal_reduction_pctg[cpu]++;
+               per_cpu(cpufreq_thermal_reduction_pctg, cpu)++;
                cpufreq_update_policy(cpu);
                return 0;
        }
@@ -128,14 +128,14 @@ static int acpi_thermal_cpufreq_decrease(unsigned int cpu)
        if (!cpu_has_cpufreq(cpu))
                return -ENODEV;
 
-       if (cpufreq_thermal_reduction_pctg[cpu] >
+       if (per_cpu(cpufreq_thermal_reduction_pctg, cpu) >
                (CPUFREQ_THERMAL_MIN_STEP + 1))
-               cpufreq_thermal_reduction_pctg[cpu]--;
+               per_cpu(cpufreq_thermal_reduction_pctg, cpu)--;
        else
-               cpufreq_thermal_reduction_pctg[cpu] = 0;
+               per_cpu(cpufreq_thermal_reduction_pctg, cpu) = 0;
        cpufreq_update_policy(cpu);
        /* We reached max freq again and can leave passive mode */
-       return !cpufreq_thermal_reduction_pctg[cpu];
+       return !per_cpu(cpufreq_thermal_reduction_pctg, cpu);
 }
 
 static int acpi_thermal_cpufreq_notifier(struct notifier_block *nb,
@@ -147,9 +147,10 @@ static int acpi_thermal_cpufreq_notifier(struct notifier_block *nb,
        if (event != CPUFREQ_ADJUST)
                goto out;
 
-       max_freq =
-           (policy->cpuinfo.max_freq *
-            (100 - cpufreq_thermal_reduction_pctg[policy->cpu] * 20)) / 100;
+       max_freq = (
+           policy->cpuinfo.max_freq *
+           (100 - per_cpu(cpufreq_thermal_reduction_pctg, policy->cpu) * 20)
+       ) / 100;
 
        cpufreq_verify_within_limits(policy, 0, max_freq);
 
@@ -174,7 +175,7 @@ static int cpufreq_get_cur_state(unsigned int cpu)
        if (!cpu_has_cpufreq(cpu))
                return 0;
 
-       return cpufreq_thermal_reduction_pctg[cpu];
+       return per_cpu(cpufreq_thermal_reduction_pctg, cpu);
 }
 
 static int cpufreq_set_cur_state(unsigned int cpu, int state)
@@ -182,7 +183,7 @@ static int cpufreq_set_cur_state(unsigned int cpu, int state)
        if (!cpu_has_cpufreq(cpu))
                return 0;
 
-       cpufreq_thermal_reduction_pctg[cpu] = state;
+       per_cpu(cpufreq_thermal_reduction_pctg, cpu) = state;
        cpufreq_update_policy(cpu);
        return 0;
 }
@@ -191,8 +192,9 @@ void acpi_thermal_cpufreq_init(void)
 {
        int i;
 
-       for (i = 0; i < NR_CPUS; i++)
-               cpufreq_thermal_reduction_pctg[i] = 0;
+       for (i = 0; i < nr_cpu_ids; i++)
+               if (cpu_present(i))
+                       per_cpu(cpufreq_thermal_reduction_pctg, i) = 0;
 
        i = cpufreq_register_notifier(&acpi_thermal_cpufreq_notifier_block,
                                      CPUFREQ_POLICY_NOTIFIER);