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Subject[PATCH 09/10] x86: Change NR_CPUS arrays in acpi-cpufreq V2
Change the following static arrays sized by NR_CPUS to
per_cpu data variables:

acpi_cpufreq_data *drv_data[NR_CPUS]

Signed-off-by: Mike Travis <travis@sgi.com>
Reviewed-by: Christoph Lameter <clameter@sgi.com>
---
V1->V2:
- (none)
---
arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c | 25 +++++++++++++------------
1 file changed, 13 insertions(+), 12 deletions(-)
--- 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(un

#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(un

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_
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 cp

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
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

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");

--


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