1 files changed, 13 insertions, 12 deletions

diff --git a/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c b/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
index fea0af0476b9..a962dcb9c408 100644
--- a/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
+++ b/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
@@ -67,7 +67,8 @@ struct acpi_cpufreq_data {
 	unsigned int cpu_feature;
 };
 
-static struct acpi_cpufreq_data *drv_data[NR_CPUS];
+static DEFINE_PER_CPU(struct acpi_cpufreq_data *, drv_data);
+
 /* acpi_perf_data is a pointer to percpu data. */
 static struct acpi_processor_performance *acpi_perf_data;
 
@@ -218,14 +219,14 @@ static u32 get_cur_val(cpumask_t mask)
 	if (unlikely(cpus_empty(mask)))
 		return 0;
 
-	switch (drv_data[first_cpu(mask)]->cpu_feature) {
+	switch (per_cpu(drv_data, first_cpu(mask))->cpu_feature) {
 	case SYSTEM_INTEL_MSR_CAPABLE:
 		cmd.type = SYSTEM_INTEL_MSR_CAPABLE;
 		cmd.addr.msr.reg = MSR_IA32_PERF_STATUS;
 		break;
 	case SYSTEM_IO_CAPABLE:
 		cmd.type = SYSTEM_IO_CAPABLE;
-		perf = drv_data[first_cpu(mask)]->acpi_data;
+		perf = per_cpu(drv_data, first_cpu(mask))->acpi_data;
 		cmd.addr.io.port = perf->control_register.address;
 		cmd.addr.io.bit_width = perf->control_register.bit_width;
 		break;
@@ -325,7 +326,7 @@ static unsigned int get_measured_perf(unsigned int cpu)
 
 #endif
 
-	retval = drv_data[cpu]->max_freq * perf_percent / 100;
+	retval = per_cpu(drv_data, cpu)->max_freq * perf_percent / 100;
 
 	put_cpu();
 	set_cpus_allowed(current, saved_mask);
@@ -336,7 +337,7 @@ static unsigned int get_measured_perf(unsigned int cpu)
 
 static unsigned int get_cur_freq_on_cpu(unsigned int cpu)
 {
-	struct acpi_cpufreq_data *data = drv_data[cpu];
+	struct acpi_cpufreq_data *data = per_cpu(drv_data, cpu);
 	unsigned int freq;
 
 	dprintk("get_cur_freq_on_cpu (%d)\n", cpu);
@@ -370,7 +371,7 @@ static unsigned int check_freqs(cpumask_t mask, unsigned int freq,
 static int acpi_cpufreq_target(struct cpufreq_policy *policy,
 			       unsigned int target_freq, unsigned int relation)
 {
-	struct acpi_cpufreq_data *data = drv_data[policy->cpu];
+	struct acpi_cpufreq_data *data = per_cpu(drv_data, policy->cpu);
 	struct acpi_processor_performance *perf;
 	struct cpufreq_freqs freqs;
 	cpumask_t online_policy_cpus;
@@ -466,7 +467,7 @@ static int acpi_cpufreq_target(struct cpufreq_policy *policy,
 
 static int acpi_cpufreq_verify(struct cpufreq_policy *policy)
 {
-	struct acpi_cpufreq_data *data = drv_data[policy->cpu];
+	struct acpi_cpufreq_data *data = per_cpu(drv_data, policy->cpu);
 
 	dprintk("acpi_cpufreq_verify\n");
 
@@ -570,7 +571,7 @@ static int acpi_cpufreq_cpu_init(struct cpufreq_policy *policy)
 		return -ENOMEM;
 
 	data->acpi_data = percpu_ptr(acpi_perf_data, cpu);
-	drv_data[cpu] = data;
+	per_cpu(drv_data, cpu) = data;
 
 	if (cpu_has(c, X86_FEATURE_CONSTANT_TSC))
 		acpi_cpufreq_driver.flags |= CPUFREQ_CONST_LOOPS;
@@ -714,20 +715,20 @@ err_unreg:
 	acpi_processor_unregister_performance(perf, cpu);
 err_free:
 	kfree(data);
-	drv_data[cpu] = NULL;
+	per_cpu(drv_data, cpu) = NULL;
 
 	return result;
 }
 
 static int acpi_cpufreq_cpu_exit(struct cpufreq_policy *policy)
 {
-	struct acpi_cpufreq_data *data = drv_data[policy->cpu];
+	struct acpi_cpufreq_data *data = per_cpu(drv_data, policy->cpu);
 
 	dprintk("acpi_cpufreq_cpu_exit\n");
 
 	if (data) {
 		cpufreq_frequency_table_put_attr(policy->cpu);
-		drv_data[policy->cpu] = NULL;
+		per_cpu(drv_data, policy->cpu) = NULL;
 		acpi_processor_unregister_performance(data->acpi_data,
 						      policy->cpu);
 		kfree(data);
@@ -738,7 +739,7 @@ static int acpi_cpufreq_cpu_exit(struct cpufreq_policy *policy)
 
 static int acpi_cpufreq_resume(struct cpufreq_policy *policy)
 {
-	struct acpi_cpufreq_data *data = drv_data[policy->cpu];
+	struct acpi_cpufreq_data *data = per_cpu(drv_data, policy->cpu);
 
 	dprintk("acpi_cpufreq_resume\n");