Merge branch 'iommu/fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/linux-2.6-iommu into x86/urgent

1 files changed, 19 insertions, 13 deletions

diff --git a/arch/x86/kernel/cpu/cpufreq/powernow-k8.c b/arch/x86/kernel/cpu/cpufreq/powernow-k8.c
index 3f12dabeab52..f125e5c551c0 100644
--- a/arch/x86/kernel/cpu/cpufreq/powernow-k8.c
+++ b/arch/x86/kernel/cpu/cpufreq/powernow-k8.c
@@ -1118,7 +1118,7 @@ static int transition_frequency_pstate(struct powernow_k8_data *data,
 static int powernowk8_target(struct cpufreq_policy *pol,
 		unsigned targfreq, unsigned relation)
 {
-	cpumask_t oldmask;
+	cpumask_var_t oldmask;
 	struct powernow_k8_data *data = per_cpu(powernow_data, pol->cpu);
 	u32 checkfid;
 	u32 checkvid;
@@ -1131,9 +1131,13 @@ static int powernowk8_target(struct cpufreq_policy *pol,
 	checkfid = data->currfid;
 	checkvid = data->currvid;
 
-	/* only run on specific CPU from here on */
-	oldmask = current->cpus_allowed;
-	set_cpus_allowed_ptr(current, &cpumask_of_cpu(pol->cpu));
+	/* only run on specific CPU from here on. */
+	/* This is poor form: use a workqueue or smp_call_function_single */
+	if (!alloc_cpumask_var(&oldmask, GFP_KERNEL))
+		return -ENOMEM;
+
+	cpumask_copy(oldmask, tsk_cpus_allowed(current));
+	set_cpus_allowed_ptr(current, cpumask_of(pol->cpu));
 
 	if (smp_processor_id() != pol->cpu) {
 		printk(KERN_ERR PFX "limiting to cpu %u failed\n", pol->cpu);
@@ -1193,7 +1197,8 @@ static int powernowk8_target(struct cpufreq_policy *pol,
 	ret = 0;
 
 err_out:
-	set_cpus_allowed_ptr(current, &oldmask);
+	set_cpus_allowed_ptr(current, oldmask);
+	free_cpumask_var(oldmask);
 	return ret;
 }
 
@@ -1393,14 +1398,15 @@ static struct freq_attr *powernow_k8_attr[] = {
 };
 
 static struct cpufreq_driver cpufreq_amd64_driver = {
-	.verify = powernowk8_verify,
-	.target = powernowk8_target,
-	.init = powernowk8_cpu_init,
-	.exit = __devexit_p(powernowk8_cpu_exit),
-	.get = powernowk8_get,
-	.name = "powernow-k8",
-	.owner = THIS_MODULE,
-	.attr = powernow_k8_attr,
+	.verify		= powernowk8_verify,
+	.target		= powernowk8_target,
+	.bios_limit	= acpi_processor_get_bios_limit,
+	.init		= powernowk8_cpu_init,
+	.exit		= __devexit_p(powernowk8_cpu_exit),
+	.get		= powernowk8_get,
+	.name		= "powernow-k8",
+	.owner		= THIS_MODULE,
+	.attr		= powernow_k8_attr,
 };
 
 /* driver entry point for init */