1 files changed, 11 insertions, 5 deletions

diff --git a/arch/i386/kernel/cpu/cpufreq/powernow-k8.c b/arch/i386/kernel/cpu/cpufreq/powernow-k8.c
index e5bc06480ff9..712a26bd4457 100644
--- a/arch/i386/kernel/cpu/cpufreq/powernow-k8.c
+++ b/arch/i386/kernel/cpu/cpufreq/powernow-k8.c
@@ -40,6 +40,7 @@
 
 #ifdef CONFIG_X86_POWERNOW_K8_ACPI
 #include <linux/acpi.h>
+#include <linux/mutex.h>
 #include <acpi/processor.h>
 #endif
 
@@ -49,7 +50,7 @@
 #include "powernow-k8.h"
 
 /* serialize freq changes  */
-static DECLARE_MUTEX(fidvid_sem);
+static DEFINE_MUTEX(fidvid_mutex);
 
 static struct powernow_k8_data *powernow_data[NR_CPUS];
 
@@ -943,17 +944,17 @@ static int powernowk8_target(struct cpufreq_policy *pol, unsigned targfreq, unsi
         if (cpufreq_frequency_table_target(pol, data->powernow_table, targfreq, relation, &newstate))
                 goto err_out;
 
-        down(&fidvid_sem);
+        mutex_lock(&fidvid_mutex);
 
         powernow_k8_acpi_pst_values(data, newstate);
 
         if (transition_frequency(data, newstate)) {
                 printk(KERN_ERR PFX "transition frequency failed\n");
                 ret = 1;
-                up(&fidvid_sem);
+                mutex_unlock(&fidvid_mutex);
                 goto err_out;
         }
-        up(&fidvid_sem);
+        mutex_unlock(&fidvid_mutex);
 
         pol->cur = find_khz_freq_from_fid(data->currfid);
         ret = 0;
@@ -1094,10 +1095,15 @@ static int __devexit powernowk8_cpu_exit (struct cpufreq_policy *pol)
 
 static unsigned int powernowk8_get (unsigned int cpu)
 {
-        struct powernow_k8_data *data = powernow_data[cpu];
+        struct powernow_k8_data *data;
         cpumask_t oldmask = current->cpus_allowed;
         unsigned int khz = 0;
 
+        data = powernow_data[first_cpu(cpu_core_map[cpu])];
+
+        if (!data)
+                return -EINVAL;
+
         set_cpus_allowed(current, cpumask_of_cpu(cpu));
         if (smp_processor_id() != cpu) {
                 printk(KERN_ERR PFX "limiting to CPU %d failed in powernowk8_get\n", cpu);