5 files changed, 74 insertions, 48 deletions

diff --git a/arch/x86/kernel/cpu/cpufreq/p4-clockmod.c b/arch/x86/kernel/cpu/cpufreq/p4-clockmod.c
index b8e05ee4f736..beea4466b063 100644
--- a/arch/x86/kernel/cpu/cpufreq/p4-clockmod.c
+++ b/arch/x86/kernel/cpu/cpufreq/p4-clockmod.c
@@ -160,6 +160,7 @@ static unsigned int cpufreq_p4_get_frequency(struct cpuinfo_x86 *c)
                 switch (c->x86_model) {
                 case 0x0E: /* Core */
                 case 0x0F: /* Core Duo */
+                case 0x16: /* Celeron Core */
                         p4clockmod_driver.flags |= CPUFREQ_CONST_LOOPS;
                         return speedstep_get_processor_frequency(SPEEDSTEP_PROCESSOR_PCORE);
                 case 0x0D: /* Pentium M (Dothan) */
@@ -171,7 +172,9 @@ static unsigned int cpufreq_p4_get_frequency(struct cpuinfo_x86 *c)
         }
 
         if (c->x86 != 0xF) {
-                printk(KERN_WARNING PFX "Unknown p4-clockmod-capable CPU. Please send an e-mail to <cpufreq@vger.kernel.org>\n");
+                if (!cpu_has(c, X86_FEATURE_EST))
+                        printk(KERN_WARNING PFX "Unknown p4-clockmod-capable CPU. "
+                                "Please send an e-mail to <cpufreq@vger.kernel.org>\n");
                 return 0;
         }
 
@@ -274,6 +277,7 @@ static struct cpufreq_driver p4clockmod_driver = {
         .name           = "p4-clockmod",
         .owner          = THIS_MODULE,
         .attr           = p4clockmod_attr,
+        .hide_interface = 1,
 };
 
 
diff --git a/arch/x86/kernel/cpu/cpufreq/speedstep-centrino.c b/arch/x86/kernel/cpu/cpufreq/speedstep-centrino.c
index 3b5f06423e77..f0ea6fa2f53c 100644
--- a/arch/x86/kernel/cpu/cpufreq/speedstep-centrino.c
+++ b/arch/x86/kernel/cpu/cpufreq/speedstep-centrino.c
@@ -459,9 +459,7 @@ static int centrino_verify (struct cpufreq_policy *policy)
  * Sets a new CPUFreq policy.
  */
 struct allmasks {
-        cpumask_t               online_policy_cpus;
         cpumask_t               saved_mask;
-        cpumask_t               set_mask;
         cpumask_t               covered_cpus;
 };
 
@@ -475,9 +473,7 @@ static int centrino_target (struct cpufreq_policy *policy,
         int                     retval = 0;
         unsigned int            j, k, first_cpu, tmp;
         CPUMASK_ALLOC(allmasks);
-        CPUMASK_PTR(online_policy_cpus, allmasks);
         CPUMASK_PTR(saved_mask, allmasks);
-        CPUMASK_PTR(set_mask, allmasks);
         CPUMASK_PTR(covered_cpus, allmasks);
 
         if (unlikely(allmasks == NULL))
@@ -497,30 +493,28 @@ static int centrino_target (struct cpufreq_policy *policy,
                 goto out;
         }
 
-#ifdef CONFIG_HOTPLUG_CPU
-        /* cpufreq holds the hotplug lock, so we are safe from here on */
-        cpus_and(*online_policy_cpus, cpu_online_map, policy->cpus);
-#else
-        *online_policy_cpus = policy->cpus;
-#endif
-
         *saved_mask = current->cpus_allowed;
         first_cpu = 1;
         cpus_clear(*covered_cpus);
-        for_each_cpu_mask_nr(j, *online_policy_cpus) {
+        for_each_cpu_mask_nr(j, policy->cpus) {
+                const cpumask_t *mask;
+
+                /* cpufreq holds the hotplug lock, so we are safe here */
+                if (!cpu_online(j))
+                        continue;
+
                 /*
                  * Support for SMP systems.
                  * Make sure we are running on CPU that wants to change freq
                  */
-                cpus_clear(*set_mask);
                 if (policy->shared_type == CPUFREQ_SHARED_TYPE_ANY)
-                        cpus_or(*set_mask, *set_mask, *online_policy_cpus);
+                        mask = &policy->cpus;
                 else
-                        cpu_set(j, *set_mask);
+                        mask = &cpumask_of_cpu(j);
 
-                set_cpus_allowed_ptr(current, set_mask);
+                set_cpus_allowed_ptr(current, mask);
                 preempt_disable();
-                if (unlikely(!cpu_isset(smp_processor_id(), *set_mask))) {
+                if (unlikely(!cpu_isset(smp_processor_id(), *mask))) {
                         dprintk("couldn't limit to CPUs in this domain\n");
                         retval = -EAGAIN;
                         if (first_cpu) {
@@ -548,7 +542,9 @@ static int centrino_target (struct cpufreq_policy *policy,
                         dprintk("target=%dkHz old=%d new=%d msr=%04x\n",
                                 target_freq, freqs.old, freqs.new, msr);
 
-                        for_each_cpu_mask_nr(k, *online_policy_cpus) {
+                        for_each_cpu_mask_nr(k, policy->cpus) {
+                                if (!cpu_online(k))
+                                        continue;
                                 freqs.cpu = k;
                                 cpufreq_notify_transition(&freqs,
                                         CPUFREQ_PRECHANGE);
@@ -571,7 +567,9 @@ static int centrino_target (struct cpufreq_policy *policy,
                 preempt_enable();
         }
 
-        for_each_cpu_mask_nr(k, *online_policy_cpus) {
+        for_each_cpu_mask_nr(k, policy->cpus) {
+                if (!cpu_online(k))
+                        continue;
                 freqs.cpu = k;
                 cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);
         }
@@ -584,18 +582,17 @@ static int centrino_target (struct cpufreq_policy *policy,
                  * Best effort undo..
                  */
 
-                if (!cpus_empty(*covered_cpus))
-                        for_each_cpu_mask_nr(j, *covered_cpus) {
-                                set_cpus_allowed_ptr(current,
-                                                     &cpumask_of_cpu(j));
-                                wrmsr(MSR_IA32_PERF_CTL, oldmsr, h);
-                        }
+                for_each_cpu_mask_nr(j, *covered_cpus) {
+                        set_cpus_allowed_ptr(current, &cpumask_of_cpu(j));
+                        wrmsr(MSR_IA32_PERF_CTL, oldmsr, h);
+                }
 
                 tmp = freqs.new;
                 freqs.new = freqs.old;
                 freqs.old = tmp;
-                for_each_cpu_mask_nr(j, *online_policy_cpus) {
-                        freqs.cpu = j;
+                for_each_cpu_mask_nr(j, policy->cpus) {
+                        if (!cpu_online(j))
+                                continue;
                         cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);
                         cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);
                 }
diff --git a/arch/x86/kernel/cpu/cpufreq/speedstep-lib.c b/arch/x86/kernel/cpu/cpufreq/speedstep-lib.c
index 98d4fdb7dc04..cdac7d62369b 100644
--- a/arch/x86/kernel/cpu/cpufreq/speedstep-lib.c
+++ b/arch/x86/kernel/cpu/cpufreq/speedstep-lib.c
@@ -139,6 +139,15 @@ static unsigned int pentium_core_get_frequency(void)
         case 3:
                 fsb = 166667;
                 break;
+        case 2:
+                fsb = 200000;
+                break;
+        case 0:
+                fsb = 266667;
+                break;
+        case 4:
+                fsb = 333333;
+                break;
         default:
                 printk(KERN_ERR "PCORE - MSR_FSB_FREQ undefined value");
         }
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index 31d6f535a79d..01dde80597f7 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -754,6 +754,11 @@ static struct kobj_type ktype_cpufreq = {
         .release        = cpufreq_sysfs_release,
 };
 
+static struct kobj_type ktype_empty_cpufreq = {
+        .sysfs_ops      = &sysfs_ops,
+        .release        = cpufreq_sysfs_release,
+};
+
 
 /**
  * cpufreq_add_dev - add a CPU device
@@ -822,8 +827,8 @@ static int cpufreq_add_dev(struct sys_device *sys_dev)
                 dprintk("initialization failed\n");
                 goto err_out;
         }
-        policy->user_policy.min = policy->cpuinfo.min_freq;
-        policy->user_policy.max = policy->cpuinfo.max_freq;
+        policy->user_policy.min = policy->min;
+        policy->user_policy.max = policy->max;
 
         blocking_notifier_call_chain(&cpufreq_policy_notifier_list,
                                      CPUFREQ_START, policy);
@@ -876,26 +881,36 @@ static int cpufreq_add_dev(struct sys_device *sys_dev)
         memcpy(&new_policy, policy, sizeof(struct cpufreq_policy));
 
         /* prepare interface data */
-        ret = kobject_init_and_add(&policy->kobj, &ktype_cpufreq, &sys_dev->kobj,
-                                   "cpufreq");
-        if (ret)
-                goto err_out_driver_exit;
-
-        /* set up files for this cpu device */
-        drv_attr = cpufreq_driver->attr;
-        while ((drv_attr) && (*drv_attr)) {
-                ret = sysfs_create_file(&policy->kobj, &((*drv_attr)->attr));
+        if (!cpufreq_driver->hide_interface) {
+                ret = kobject_init_and_add(&policy->kobj, &ktype_cpufreq,
+                                           &sys_dev->kobj, "cpufreq");
                 if (ret)
                         goto err_out_driver_exit;
-                drv_attr++;
-        }
-        if (cpufreq_driver->get) {
-                ret = sysfs_create_file(&policy->kobj, &cpuinfo_cur_freq.attr);
-                if (ret)
-                        goto err_out_driver_exit;
-        }
-        if (cpufreq_driver->target) {
-                ret = sysfs_create_file(&policy->kobj, &scaling_cur_freq.attr);
+
+                /* set up files for this cpu device */
+                drv_attr = cpufreq_driver->attr;
+                while ((drv_attr) && (*drv_attr)) {
+                        ret = sysfs_create_file(&policy->kobj,
+                                                &((*drv_attr)->attr));
+                        if (ret)
+                                goto err_out_driver_exit;
+                        drv_attr++;
+                }
+                if (cpufreq_driver->get) {
+                        ret = sysfs_create_file(&policy->kobj,
+                                                &cpuinfo_cur_freq.attr);
+                        if (ret)
+                                goto err_out_driver_exit;
+                }
+                if (cpufreq_driver->target) {
+                        ret = sysfs_create_file(&policy->kobj,
+                                                &scaling_cur_freq.attr);
+                        if (ret)
+                                goto err_out_driver_exit;
+                }
+        } else {
+                ret = kobject_init_and_add(&policy->kobj, &ktype_empty_cpufreq,
+                                           &sys_dev->kobj, "cpufreq");
                 if (ret)
                         goto err_out_driver_exit;
         }
diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h
index 1ee608fd7b77..484b3abf61bb 100644
--- a/include/linux/cpufreq.h
+++ b/include/linux/cpufreq.h
@@ -234,6 +234,7 @@ struct cpufreq_driver {
         int     (*suspend)      (struct cpufreq_policy *policy, pm_message_t pmsg);
         int     (*resume)       (struct cpufreq_policy *policy);
         struct freq_attr        **attr;
+        bool                    hide_interface;
 };
 
 /* flags */