Merge master.kernel.org:/pub/scm/linux/kernel/git/davej/cpufreq

* master.kernel.org:/pub/scm/linux/kernel/git/davej/cpufreq:
  [CPUFREQ] Report the number of processors in PowerNow-k8 correctly
  [CPUFREQ] do not declare undefined functions
  [CPUFREQ] cleanup kconfig options
  [CPUFREQ] Longhaul - Revert Longhaul ver. 2
  [CPUFREQ] Remove deprecated /proc/acpi/processor/performance write support
  [CPUFREQ] Fix limited cpufreq when booted on battery
  Fix preemption warnings in speedstep-centrino.c
  [CPUFREQ] Longhaul - Correct PCI code
  [CPUFREQ] p4-clockmod: switch to rdmsr_on_cpu/wrmsr_on_cpu

arch/i386/kernel/cpu/cpufreq/longhaul.c

@@ -590,20 +590,23 @@ static acpi_status longhaul_walk_callback(acpi_handle obj_handle,
 static int enable_arbiter_disable(void)
 {
 	struct pci_dev *dev;
+	int status;
 	int reg;
 	u8 pci_cmd;
 
+	status = 1;
 	/* Find PLE133 host bridge */
 	reg = 0x78;
-	dev = pci_find_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8601_0, NULL);
+	dev = pci_get_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8601_0,
+			     NULL);
 	/* Find CLE266 host bridge */
 	if (dev == NULL) {
 		reg = 0x76;
-		dev = pci_find_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_862X_0, NULL);
+		dev = pci_get_device(PCI_VENDOR_ID_VIA,
+				     PCI_DEVICE_ID_VIA_862X_0, NULL);
 		/* Find CN400 V-Link host bridge */
 		if (dev == NULL)
-			dev = pci_find_device(PCI_VENDOR_ID_VIA, 0x7259, NULL);
-
+			dev = pci_get_device(PCI_VENDOR_ID_VIA, 0x7259, NULL);
 	}
 	if (dev != NULL) {
 		/* Enable access to port 0x22 */
@@ -615,10 +618,11 @@ static int enable_arbiter_disable(void)
 			if (!(pci_cmd & 1<<7)) {
 				printk(KERN_ERR PFX
 					"Can't enable access to port 0x22.\n");
-				return 0;
+				status = 0;
 			}
 		}
-		return 1;
+		pci_dev_put(dev);
+		return status;
 	}
 	return 0;
 }
@@ -629,7 +633,7 @@ static int longhaul_setup_vt8235(void)
 	u8 pci_cmd;
 
 	/* Find VT8235 southbridge */
-	dev = pci_find_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8235, NULL);
+	dev = pci_get_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8235, NULL);
 	if (dev != NULL) {
 		/* Set transition time to max */
 		pci_read_config_byte(dev, 0xec, &pci_cmd);
@@ -641,6 +645,7 @@ static int longhaul_setup_vt8235(void)
 		pci_read_config_byte(dev, 0xe5, &pci_cmd);
 		pci_cmd |= 1 << 7;
 		pci_write_config_byte(dev, 0xe5, pci_cmd);
+		pci_dev_put(dev);
 		return 1;
 	}
 	return 0;
@@ -678,7 +683,7 @@ static int __init longhaul_cpu_init(struct cpufreq_policy *policy)
 				sizeof(samuel2_eblcr));
 			break;
 		case 1 ... 15:
-			longhaul_version = TYPE_LONGHAUL_V2;
+			longhaul_version = TYPE_LONGHAUL_V1;
 			if (c->x86_mask < 8) {
 				cpu_model = CPU_SAMUEL2;
 				cpuname = "C3 'Samuel 2' [C5B]";

arch/i386/kernel/cpu/cpufreq/p4-clockmod.c

@@ -27,7 +27,6 @@
 #include <linux/cpufreq.h>
 #include <linux/slab.h>
 #include <linux/cpumask.h>
-#include <linux/sched.h>	/* current / set_cpus_allowed() */
 
 #include <asm/processor.h>
 #include <asm/msr.h>
@@ -62,7 +61,7 @@ static int cpufreq_p4_setdc(unsigned int cpu, unsigned int newstate)
 	if (!cpu_online(cpu) || (newstate > DC_DISABLE) || (newstate == DC_RESV))
 		return -EINVAL;
 
-	rdmsr(MSR_IA32_THERM_STATUS, l, h);
+	rdmsr_on_cpu(cpu, MSR_IA32_THERM_STATUS, &l, &h);
 
 	if (l & 0x01)
 		dprintk("CPU#%d currently thermal throttled\n", cpu);
@@ -70,10 +69,10 @@ static int cpufreq_p4_setdc(unsigned int cpu, unsigned int newstate)
 	if (has_N44_O17_errata[cpu] && (newstate == DC_25PT || newstate == DC_DFLT))
 		newstate = DC_38PT;
 
-	rdmsr(MSR_IA32_THERM_CONTROL, l, h);
+	rdmsr_on_cpu(cpu, MSR_IA32_THERM_CONTROL, &l, &h);
 	if (newstate == DC_DISABLE) {
 		dprintk("CPU#%d disabling modulation\n", cpu);
-		wrmsr(MSR_IA32_THERM_CONTROL, l & ~(1<<4), h);
+		wrmsr_on_cpu(cpu, MSR_IA32_THERM_CONTROL, l & ~(1<<4), h);
 	} else {
 		dprintk("CPU#%d setting duty cycle to %d%%\n",
 			cpu, ((125 * newstate) / 10));
@@ -84,7 +83,7 @@ static int cpufreq_p4_setdc(unsigned int cpu, unsigned int newstate)
 		 */
 		l = (l & ~14);
 		l = l | (1<<4) | ((newstate & 0x7)<<1);
-		wrmsr(MSR_IA32_THERM_CONTROL, l, h);
+		wrmsr_on_cpu(cpu, MSR_IA32_THERM_CONTROL, l, h);
 	}
 
 	return 0;
@@ -111,7 +110,6 @@ static int cpufreq_p4_target(struct cpufreq_policy *policy,
 {
 	unsigned int    newstate = DC_RESV;
 	struct cpufreq_freqs freqs;
-	cpumask_t cpus_allowed;
 	int i;
 
 	if (cpufreq_frequency_table_target(policy, &p4clockmod_table[0], target_freq, relation, &newstate))
@@ -132,17 +130,8 @@ static int cpufreq_p4_target(struct cpufreq_policy *policy,
 	/* run on each logical CPU, see section 13.15.3 of IA32 Intel Architecture Software
 	 * Developer's Manual, Volume 3
 	 */
-	cpus_allowed = current->cpus_allowed;
-
-	for_each_cpu_mask(i, policy->cpus) {
-		cpumask_t this_cpu = cpumask_of_cpu(i);
-
-		set_cpus_allowed(current, this_cpu);
-		BUG_ON(smp_processor_id() != i);
-
+	for_each_cpu_mask(i, policy->cpus)
 		cpufreq_p4_setdc(i, p4clockmod_table[newstate].index);
-	}
-	set_cpus_allowed(current, cpus_allowed);
 
 	/* notifiers */
 	for_each_cpu_mask(i, policy->cpus) {
@@ -256,17 +245,9 @@ static int cpufreq_p4_cpu_exit(struct cpufreq_policy *policy)
 
 static unsigned int cpufreq_p4_get(unsigned int cpu)
 {
-	cpumask_t cpus_allowed;
 	u32 l, h;
 
-	cpus_allowed = current->cpus_allowed;
-
-	set_cpus_allowed(current, cpumask_of_cpu(cpu));
-	BUG_ON(smp_processor_id() != cpu);
-
-	rdmsr(MSR_IA32_THERM_CONTROL, l, h);
-
-	set_cpus_allowed(current, cpus_allowed);
+	rdmsr_on_cpu(cpu, MSR_IA32_THERM_CONTROL, &l, &h);
 
 	if (l & 0x10) {
 		l = l >> 1;

arch/i386/kernel/cpu/cpufreq/powernow-k8.c

@@ -661,6 +661,7 @@ static int fill_powernow_table(struct powernow_k8_data *data, struct pst_s *pst,
 
 	dprintk("cfid 0x%x, cvid 0x%x\n", data->currfid, data->currvid);
 	data->powernow_table = powernow_table;
+	if (first_cpu(cpu_core_map[data->cpu]) == data->cpu)
 		print_basics(data);
 
 	for (j = 0; j < data->numps; j++)
@@ -814,6 +815,7 @@ static int powernow_k8_cpu_init_acpi(struct powernow_k8_data *data)
 
 	/* fill in data */
 	data->numps = data->acpi_data.state_count;
+	if (first_cpu(cpu_core_map[data->cpu]) == data->cpu)
 		print_basics(data);
 	powernow_k8_acpi_pst_values(data, 0);
 

arch/i386/kernel/cpu/cpufreq/powernow-k8.h

@@ -215,8 +215,10 @@ static int core_frequency_transition(struct powernow_k8_data *data, u32 reqfid);
 
 static void powernow_k8_acpi_pst_values(struct powernow_k8_data *data, unsigned int index);
 
+#ifdef CONFIG_X86_POWERNOW_K8_ACPI
 static int fill_powernow_table_pstate(struct powernow_k8_data *data, struct cpufreq_frequency_table *powernow_table);
 static int fill_powernow_table_fidvid(struct powernow_k8_data *data, struct cpufreq_frequency_table *powernow_table);
+#endif
 
 #ifdef CONFIG_SMP
 static inline void define_siblings(int cpu, cpumask_t cpu_sharedcore_mask[])

arch/i386/kernel/cpu/cpufreq/speedstep-centrino.c

@@ -720,6 +720,7 @@ static int centrino_target (struct cpufreq_policy *policy,
 			cpu_set(j, set_mask);
 
 		set_cpus_allowed(current, set_mask);
+		preempt_disable();
 		if (unlikely(!cpu_isset(smp_processor_id(), set_mask))) {
 			dprintk("couldn't limit to CPUs in this domain\n");
 			retval = -EAGAIN;
@@ -727,6 +728,7 @@ static int centrino_target (struct cpufreq_policy *policy,
 				/* We haven't started the transition yet. */
 				goto migrate_end;
 			}
+			preempt_enable();
 			break;
 		}
 
@@ -761,10 +763,13 @@ static int centrino_target (struct cpufreq_policy *policy,
 		}
 
 		wrmsr(MSR_IA32_PERF_CTL, oldmsr, h);
-		if (policy->shared_type == CPUFREQ_SHARED_TYPE_ANY)
+		if (policy->shared_type == CPUFREQ_SHARED_TYPE_ANY) {
+			preempt_enable();
 			break;
+		}
 
 		cpu_set(j, covered_cpus);
+		preempt_enable();
 	}
 
 	for_each_cpu_mask(k, online_policy_cpus) {
@@ -796,8 +801,11 @@ static int centrino_target (struct cpufreq_policy *policy,
 			cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);
 		}
 	}
+	set_cpus_allowed(current, saved_mask);
+	return 0;
 
 migrate_end:
+	preempt_enable();
 	set_cpus_allowed(current, saved_mask);
 	return 0;
 }

arch/x86_64/kernel/cpufreq/Kconfig

@@ -16,6 +16,9 @@ config X86_POWERNOW_K8
 	help
 	  This adds the CPUFreq driver for mobile AMD Opteron/Athlon64 processors.
 
+	  To compile this driver as a module, choose M here: the
+	  module will be called powernow-k8.
+
 	  For details, take a look at <file:Documentation/cpu-freq/>. 
 
 	  If in doubt, say N.
@@ -38,6 +41,9 @@ config X86_SPEEDSTEP_CENTRINO
 	  mobile CPUs.  This means Intel Pentium M (Centrino) CPUs
 	  or 64bit enabled Intel Xeons.
 
+	  To compile this driver as a module, choose M here: the
+	  module will be called speedstep-centrino.
+
 	  For details, take a look at <file:Documentation/cpu-freq/>.
 
 	  If in doubt, say N.
@@ -55,6 +61,9 @@ config X86_ACPI_CPUFREQ
 	  Processor Performance States.
 	  This driver also supports Intel Enhanced Speedstep.
 
+	  To compile this driver as a module, choose M here: the
+	  module will be called acpi-cpufreq.
+
 	  For details, take a look at <file:Documentation/cpu-freq/>.
 
 	  If in doubt, say N.
@@ -86,6 +95,9 @@ config X86_P4_CLOCKMOD
 	  slowdowns and noticeable latencies.  Normally Speedstep should be used
 	  instead.
 
+	  To compile this driver as a module, choose M here: the
+	  module will be called p4-clockmod.
+
 	  For details, take a look at <file:Documentation/cpu-freq/>.
 
 	  Unless you are absolutely sure say N.
@@ -98,4 +110,3 @@ config X86_SPEEDSTEP_LIB
 endif
 
 endmenu
-

drivers/acpi/processor_perflib.c

@@ -433,49 +433,6 @@ static int acpi_processor_perf_open_fs(struct inode *inode, struct file *file)
 			   PDE(inode)->data);
 }
 
-static ssize_t
-acpi_processor_write_performance(struct file *file,
-				 const char __user * buffer,
-				 size_t count, loff_t * data)
-{
-	int result = 0;
-	struct seq_file *m = file->private_data;
-	struct acpi_processor *pr = m->private;
-	struct acpi_processor_performance *perf;
-	char state_string[12] = { '\0' };
-	unsigned int new_state = 0;
-	struct cpufreq_policy policy;
-
-
-	if (!pr || (count > sizeof(state_string) - 1))
-		return -EINVAL;
-
-	perf = pr->performance;
-	if (!perf)
-		return -EINVAL;
-
-	if (copy_from_user(state_string, buffer, count))
-		return -EFAULT;
-
-	state_string[count] = '\0';
-	new_state = simple_strtoul(state_string, NULL, 0);
-
-	if (new_state >= perf->state_count)
-		return -EINVAL;
-
-	cpufreq_get_policy(&policy, pr->id);
-
-	policy.cpu = pr->id;
-	policy.min = perf->states[new_state].core_frequency * 1000;
-	policy.max = perf->states[new_state].core_frequency * 1000;
-
-	result = cpufreq_set_policy(&policy);
-	if (result)
-		return result;
-
-	return count;
-}
-
 static void acpi_cpufreq_add_file(struct acpi_processor *pr)
 {
 	struct proc_dir_entry *entry = NULL;
@@ -487,10 +444,9 @@ static void acpi_cpufreq_add_file(struct acpi_processor *pr)
 
 	/* add file 'performance' [R/W] */
 	entry = create_proc_entry(ACPI_PROCESSOR_FILE_PERFORMANCE,
-				  S_IFREG | S_IRUGO | S_IWUSR,
+				  S_IFREG | S_IRUGO,
 				  acpi_device_dir(device));
 	if (entry){
-		acpi_processor_perf_fops.write = acpi_processor_write_performance;
 		entry->proc_fops = &acpi_processor_perf_fops;
 		entry->data = acpi_driver_data(device);
 		entry->owner = THIS_MODULE;

drivers/cpufreq/Kconfig

@@ -9,6 +9,9 @@ config CPU_FREQ
 	  clock speed, you need to either enable a dynamic cpufreq governor
 	  (see below) after boot, or use a userspace tool.
 
+	  To compile this driver as a module, choose M here: the
+	  module will be called cpufreq.
+
 	  For details, take a look at <file:Documentation/cpu-freq>.
 
 	  If in doubt, say N.
@@ -37,14 +40,21 @@ config CPU_FREQ_STAT
 	default y
 	help
 	  This driver exports CPU frequency statistics information through sysfs
-         file system
+	  file system.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called cpufreq_stats.
+
+	  If in doubt, say N.
 
 config CPU_FREQ_STAT_DETAILS
 	bool "CPU frequency translation statistics details"
 	depends on CPU_FREQ_STAT
 	help
 	  This will show detail CPU frequency translation table in sysfs file
-         system
+	  system.
+
+	  If in doubt, say N.
 
 # Note that it is not currently possible to set the other governors (such as ondemand)
 # as the default, since if they fail to initialise, cpufreq will be
@@ -83,6 +93,9 @@ config CPU_FREQ_GOV_PERFORMANCE
 	  This cpufreq governor sets the frequency statically to the
 	  highest available CPU frequency.
 
+	  To compile this driver as a module, choose M here: the
+	  module will be called cpufreq_performance.
+
 	  If in doubt, say Y.
 
 config CPU_FREQ_GOV_POWERSAVE
@@ -91,6 +104,9 @@ config CPU_FREQ_GOV_POWERSAVE
 	  This cpufreq governor sets the frequency statically to the
 	  lowest available CPU frequency.
 
+	  To compile this driver as a module, choose M here: the
+	  module will be called cpufreq_powersave.
+
 	  If in doubt, say Y.
 
 config CPU_FREQ_GOV_USERSPACE
@@ -101,6 +117,9 @@ config CPU_FREQ_GOV_USERSPACE
 	  be able to set the CPU dynamically, like on LART 
 	  <http://www.lartmaker.nl/>.
 
+	  To compile this driver as a module, choose M here: the
+	  module will be called cpufreq_userspace.
+
 	  For details, take a look at <file:Documentation/cpu-freq/>.
 
 	  If in doubt, say Y.
@@ -116,6 +135,9 @@ config CPU_FREQ_GOV_ONDEMAND
 	  do fast frequency switching (i.e, very low latency frequency
 	  transitions). 
 
+	  To compile this driver as a module, choose M here: the
+	  module will be called cpufreq_ondemand.
+
 	  For details, take a look at linux/Documentation/cpu-freq.
 
 	  If in doubt, say N.
@@ -136,6 +158,9 @@ config CPU_FREQ_GOV_CONSERVATIVE
 	  step-by-step latency issues between the minimum and maximum frequency
 	  transitions in the CPU) you will probably want to use this governor.
 
+	  To compile this driver as a module, choose M here: the
+	  module will be called cpufreq_conservative.
+
 	  For details, take a look at linux/Documentation/cpu-freq.
 
 	  If in doubt, say N.

drivers/cpufreq/cpufreq.c

@@ -768,6 +768,9 @@ static int cpufreq_add_dev (struct sys_device * sys_dev)
 		unlock_policy_rwsem_write(cpu);
 		goto err_out;
 	}
+	policy->user_policy.min = policy->cpuinfo.min_freq;
+	policy->user_policy.max = policy->cpuinfo.max_freq;
+	policy->user_policy.governor = policy->governor;
 
 #ifdef CONFIG_SMP
 	for_each_cpu_mask(j, policy->cpus) {
@@ -858,10 +861,13 @@ static int cpufreq_add_dev (struct sys_device * sys_dev)
 
 	policy->governor = NULL; /* to assure that the starting sequence is
 				  * run in cpufreq_set_policy */
-	unlock_policy_rwsem_write(cpu);
 
 	/* set default policy */
-	ret = cpufreq_set_policy(&new_policy);
+	ret = __cpufreq_set_policy(policy, &new_policy);
+	policy->user_policy.policy = policy->policy;
+
+	unlock_policy_rwsem_write(cpu);
+
 	if (ret) {
 		dprintk("setting policy failed\n");
 		goto err_out_unregister;
@@ -1619,43 +1625,6 @@ error_out:
 	return ret;
 }
 
-/**
- *	cpufreq_set_policy - set a new CPUFreq policy
- *	@policy: policy to be set.
- *
- *	Sets a new CPU frequency and voltage scaling policy.
- */
-int cpufreq_set_policy(struct cpufreq_policy *policy)
-{
-	int ret = 0;
-	struct cpufreq_policy *data;
-
-	if (!policy)
-		return -EINVAL;
-
-	data = cpufreq_cpu_get(policy->cpu);
-	if (!data)
-		return -EINVAL;
-
-	if (unlikely(lock_policy_rwsem_write(policy->cpu)))
-		return -EINVAL;
-
-
-	ret = __cpufreq_set_policy(data, policy);
-	data->user_policy.min = data->min;
-	data->user_policy.max = data->max;
-	data->user_policy.policy = data->policy;
-	data->user_policy.governor = data->governor;
-
-	unlock_policy_rwsem_write(policy->cpu);
-
-	cpufreq_cpu_put(data);
-
-	return ret;
-}
-EXPORT_SYMBOL(cpufreq_set_policy);
-
-
 /**
  *	cpufreq_update_policy - re-evaluate an existing cpufreq policy
  *	@cpu: CPU which shall be re-evaluated

include/linux/cpufreq.h

@@ -257,7 +257,6 @@ struct freq_attr {
 /*********************************************************************
  *                        CPUFREQ 2.6. INTERFACE                     *
  *********************************************************************/
-int cpufreq_set_policy(struct cpufreq_policy *policy);
 int cpufreq_get_policy(struct cpufreq_policy *policy, unsigned int cpu);
 int cpufreq_update_policy(unsigned int cpu);