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Diffstat (limited to 'arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c')
-rw-r--r--arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c27
1 files changed, 24 insertions, 3 deletions
diff --git a/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c b/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
index 88ea02dcb622..d0a001093b2d 100644
--- a/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
+++ b/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
@@ -517,6 +517,17 @@ acpi_cpufreq_guess_freq(struct acpi_cpufreq_data *data, unsigned int cpu)
}
}
+static void free_acpi_perf_data(void)
+{
+ unsigned int i;
+
+ /* Freeing a NULL pointer is OK, and alloc_percpu zeroes. */
+ for_each_possible_cpu(i)
+ free_cpumask_var(per_cpu_ptr(acpi_perf_data, i)
+ ->shared_cpu_map);
+ free_percpu(acpi_perf_data);
+}
+
/*
* acpi_cpufreq_early_init - initialize ACPI P-States library
*
@@ -527,6 +538,7 @@ acpi_cpufreq_guess_freq(struct acpi_cpufreq_data *data, unsigned int cpu)
*/
static int __init acpi_cpufreq_early_init(void)
{
+ unsigned int i;
dprintk("acpi_cpufreq_early_init\n");
acpi_perf_data = alloc_percpu(struct acpi_processor_performance);
@@ -534,6 +546,15 @@ static int __init acpi_cpufreq_early_init(void)
dprintk("Memory allocation error for acpi_perf_data.\n");
return -ENOMEM;
}
+ for_each_possible_cpu(i) {
+ if (!alloc_cpumask_var(&per_cpu_ptr(acpi_perf_data, i)
+ ->shared_cpu_map, GFP_KERNEL)) {
+
+ /* Freeing a NULL pointer is OK: alloc_percpu zeroes. */
+ free_acpi_perf_data();
+ return -ENOMEM;
+ }
+ }
/* Do initialization in ACPI core */
acpi_processor_preregister_performance(acpi_perf_data);
@@ -604,9 +625,9 @@ static int acpi_cpufreq_cpu_init(struct cpufreq_policy *policy)
*/
if (policy->shared_type == CPUFREQ_SHARED_TYPE_ALL ||
policy->shared_type == CPUFREQ_SHARED_TYPE_ANY) {
- policy->cpus = perf->shared_cpu_map;
+ cpumask_copy(&policy->cpus, perf->shared_cpu_map);
}
- policy->related_cpus = perf->shared_cpu_map;
+ cpumask_copy(&policy->related_cpus, perf->shared_cpu_map);
#ifdef CONFIG_SMP
dmi_check_system(sw_any_bug_dmi_table);
@@ -795,7 +816,7 @@ static int __init acpi_cpufreq_init(void)
ret = cpufreq_register_driver(&acpi_cpufreq_driver);
if (ret)
- free_percpu(acpi_perf_data);
+ free_acpi_perf_data();
return ret;
}