[Xen-devel] [PATCH] x86: fix powernow

["Jan Beulich" <jbeulich@xxxxxxxxxx>]

... by allocating the necessary cpufreq_policy structures.

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxxxx>

Index: 2008-09-19/xen/arch/x86/acpi/cpufreq/powernow.c
===================================================================
--- 2008-09-19.orig/xen/arch/x86/acpi/cpufreq/powernow.c        2008-09-19 
13:44:18.000000000 +0200
+++ 2008-09-19/xen/arch/x86/acpi/cpufreq/powernow.c     2008-09-19 
15:44:48.000000000 +0200
@@ -283,9 +283,27 @@ int powernow_cpufreq_init(void)
 
     /* setup cpufreq infrastructure */
     for_each_online_cpu(i) {
-        cpufreq_cpu_policy[i]->cpu = i;
+        struct cpufreq_policy *policy = cpufreq_cpu_policy[i];
 
-        ret = powernow_cpufreq_cpu_init(cpufreq_cpu_policy[i]);
+        if (!policy) {
+            unsigned int firstcpu;
+
+            firstcpu = first_cpu(processor_pminfo[i]->perf.shared_cpu_map);
+            if (i == firstcpu) {
+                policy = xmalloc(struct cpufreq_policy);
+                if (!policy) {
+                    ret = -ENOMEM;
+                    goto cpufreq_init_out;
+                }
+                memset(policy, 0, sizeof(struct cpufreq_policy));
+                policy->cpu = i;
+            } else
+                policy = cpufreq_cpu_policy[firstcpu];
+            cpu_set(i, policy->cpus);
+            cpufreq_cpu_policy[i] = policy;
+        }
+
+        ret = powernow_cpufreq_cpu_init(policy);
         if (ret)
             goto cpufreq_init_out;
     }




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