[CPUFREQ] Move x86 drivers to drivers/cpufreq/

Signed-off-by: Dave Jones <davej@redhat.com>

1 files changed, 0 insertions, 773 deletions

diff --git a/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c b/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
deleted file mode 100644
index 4e04e1274388..000000000000
--- a/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
+++ /dev/null
@@ -1,773 +0,0 @@
-/*
- * acpi-cpufreq.c - ACPI Processor P-States Driver
- *
- *  Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
- *  Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
- *  Copyright (C) 2002 - 2004 Dominik Brodowski <linux@brodo.de>
- *  Copyright (C) 2006       Denis Sadykov <denis.m.sadykov@intel.com>
- *
- * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation; either version 2 of the License, or (at
- *  your option) any later version.
- *
- *  This program is distributed in the hope that it will be useful, but
- *  WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- *  General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
- *
- * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/smp.h>
-#include <linux/sched.h>
-#include <linux/cpufreq.h>
-#include <linux/compiler.h>
-#include <linux/dmi.h>
-#include <linux/slab.h>
-
-#include <linux/acpi.h>
-#include <linux/io.h>
-#include <linux/delay.h>
-#include <linux/uaccess.h>
-
-#include <acpi/processor.h>
-
-#include <asm/msr.h>
-#include <asm/processor.h>
-#include <asm/cpufeature.h>
-#include "mperf.h"
-
-MODULE_AUTHOR("Paul Diefenbaugh, Dominik Brodowski");
-MODULE_DESCRIPTION("ACPI Processor P-States Driver");
-MODULE_LICENSE("GPL");
-
-enum {
-	UNDEFINED_CAPABLE = 0,
-	SYSTEM_INTEL_MSR_CAPABLE,
-	SYSTEM_IO_CAPABLE,
-};
-
-#define INTEL_MSR_RANGE		(0xffff)
-
-struct acpi_cpufreq_data {
-	struct acpi_processor_performance *acpi_data;
-	struct cpufreq_frequency_table *freq_table;
-	unsigned int resume;
-	unsigned int cpu_feature;
-};
-
-static DEFINE_PER_CPU(struct acpi_cpufreq_data *, acfreq_data);
-
-/* acpi_perf_data is a pointer to percpu data. */
-static struct acpi_processor_performance __percpu *acpi_perf_data;
-
-static struct cpufreq_driver acpi_cpufreq_driver;
-
-static unsigned int acpi_pstate_strict;
-
-static int check_est_cpu(unsigned int cpuid)
-{
-	struct cpuinfo_x86 *cpu = &cpu_data(cpuid);
-
-	return cpu_has(cpu, X86_FEATURE_EST);
-}
-
-static unsigned extract_io(u32 value, struct acpi_cpufreq_data *data)
-{
-	struct acpi_processor_performance *perf;
-	int i;
-
-	perf = data->acpi_data;
-
-	for (i = 0; i < perf->state_count; i++) {
-		if (value == perf->states[i].status)
-			return data->freq_table[i].frequency;
-	}
-	return 0;
-}
-
-static unsigned extract_msr(u32 msr, struct acpi_cpufreq_data *data)
-{
-	int i;
-	struct acpi_processor_performance *perf;
-
-	msr &= INTEL_MSR_RANGE;
-	perf = data->acpi_data;
-
-	for (i = 0; data->freq_table[i].frequency != CPUFREQ_TABLE_END; i++) {
-		if (msr == perf->states[data->freq_table[i].index].status)
-			return data->freq_table[i].frequency;
-	}
-	return data->freq_table[0].frequency;
-}
-
-static unsigned extract_freq(u32 val, struct acpi_cpufreq_data *data)
-{
-	switch (data->cpu_feature) {
-	case SYSTEM_INTEL_MSR_CAPABLE:
-		return extract_msr(val, data);
-	case SYSTEM_IO_CAPABLE:
-		return extract_io(val, data);
-	default:
-		return 0;
-	}
-}
-
-struct msr_addr {
-	u32 reg;
-};
-
-struct io_addr {
-	u16 port;
-	u8 bit_width;
-};
-
-struct drv_cmd {
-	unsigned int type;
-	const struct cpumask *mask;
-	union {
-		struct msr_addr msr;
-		struct io_addr io;
-	} addr;
-	u32 val;
-};
-
-/* Called via smp_call_function_single(), on the target CPU */
-static void do_drv_read(void *_cmd)
-{
-	struct drv_cmd *cmd = _cmd;
-	u32 h;
-
-	switch (cmd->type) {
-	case SYSTEM_INTEL_MSR_CAPABLE:
-		rdmsr(cmd->addr.msr.reg, cmd->val, h);
-		break;
-	case SYSTEM_IO_CAPABLE:
-		acpi_os_read_port((acpi_io_address)cmd->addr.io.port,
-				&cmd->val,
-				(u32)cmd->addr.io.bit_width);
-		break;
-	default:
-		break;
-	}
-}
-
-/* Called via smp_call_function_many(), on the target CPUs */
-static void do_drv_write(void *_cmd)
-{
-	struct drv_cmd *cmd = _cmd;
-	u32 lo, hi;
-
-	switch (cmd->type) {
-	case SYSTEM_INTEL_MSR_CAPABLE:
-		rdmsr(cmd->addr.msr.reg, lo, hi);
-		lo = (lo & ~INTEL_MSR_RANGE) | (cmd->val & INTEL_MSR_RANGE);
-		wrmsr(cmd->addr.msr.reg, lo, hi);
-		break;
-	case SYSTEM_IO_CAPABLE:
-		acpi_os_write_port((acpi_io_address)cmd->addr.io.port,
-				cmd->val,
-				(u32)cmd->addr.io.bit_width);
-		break;
-	default:
-		break;
-	}
-}
-
-static void drv_read(struct drv_cmd *cmd)
-{
-	int err;
-	cmd->val = 0;
-
-	err = smp_call_function_any(cmd->mask, do_drv_read, cmd, 1);
-	WARN_ON_ONCE(err);	/* smp_call_function_any() was buggy? */
-}
-
-static void drv_write(struct drv_cmd *cmd)
-{
-	int this_cpu;
-
-	this_cpu = get_cpu();
-	if (cpumask_test_cpu(this_cpu, cmd->mask))
-		do_drv_write(cmd);
-	smp_call_function_many(cmd->mask, do_drv_write, cmd, 1);
-	put_cpu();
-}
-
-static u32 get_cur_val(const struct cpumask *mask)
-{
-	struct acpi_processor_performance *perf;
-	struct drv_cmd cmd;
-
-	if (unlikely(cpumask_empty(mask)))
-		return 0;
-
-	switch (per_cpu(acfreq_data, cpumask_first(mask))->cpu_feature) {
-	case SYSTEM_INTEL_MSR_CAPABLE:
-		cmd.type = SYSTEM_INTEL_MSR_CAPABLE;
-		cmd.addr.msr.reg = MSR_IA32_PERF_STATUS;
-		break;
-	case SYSTEM_IO_CAPABLE:
-		cmd.type = SYSTEM_IO_CAPABLE;
-		perf = per_cpu(acfreq_data, cpumask_first(mask))->acpi_data;
-		cmd.addr.io.port = perf->control_register.address;
-		cmd.addr.io.bit_width = perf->control_register.bit_width;
-		break;
-	default:
-		return 0;
-	}
-
-	cmd.mask = mask;
-	drv_read(&cmd);
-
-	pr_debug("get_cur_val = %u\n", cmd.val);
-
-	return cmd.val;
-}
-
-static unsigned int get_cur_freq_on_cpu(unsigned int cpu)
-{
-	struct acpi_cpufreq_data *data = per_cpu(acfreq_data, cpu);
-	unsigned int freq;
-	unsigned int cached_freq;
-
-	pr_debug("get_cur_freq_on_cpu (%d)\n", cpu);
-
-	if (unlikely(data == NULL ||
-		     data->acpi_data == NULL || data->freq_table == NULL)) {
-		return 0;
-	}
-
-	cached_freq = data->freq_table[data->acpi_data->state].frequency;
-	freq = extract_freq(get_cur_val(cpumask_of(cpu)), data);
-	if (freq != cached_freq) {
-		/*
-		 * The dreaded BIOS frequency change behind our back.
-		 * Force set the frequency on next target call.
-		 */
-		data->resume = 1;
-	}
-
-	pr_debug("cur freq = %u\n", freq);
-
-	return freq;
-}
-
-static unsigned int check_freqs(const struct cpumask *mask, unsigned int freq,
-				struct acpi_cpufreq_data *data)
-{
-	unsigned int cur_freq;
-	unsigned int i;
-
-	for (i = 0; i < 100; i++) {
-		cur_freq = extract_freq(get_cur_val(mask), data);
-		if (cur_freq == freq)
-			return 1;
-		udelay(10);
-	}
-	return 0;
-}
-
-static int acpi_cpufreq_target(struct cpufreq_policy *policy,
-			       unsigned int target_freq, unsigned int relation)
-{
-	struct acpi_cpufreq_data *data = per_cpu(acfreq_data, policy->cpu);
-	struct acpi_processor_performance *perf;
-	struct cpufreq_freqs freqs;
-	struct drv_cmd cmd;
-	unsigned int next_state = 0; /* Index into freq_table */
-	unsigned int next_perf_state = 0; /* Index into perf table */
-	unsigned int i;
-	int result = 0;
-
-	pr_debug("acpi_cpufreq_target %d (%d)\n", target_freq, policy->cpu);
-
-	if (unlikely(data == NULL ||
-	     data->acpi_data == NULL || data->freq_table == NULL)) {
-		return -ENODEV;
-	}
-
-	perf = data->acpi_data;
-	result = cpufreq_frequency_table_target(policy,
-						data->freq_table,
-						target_freq,
-						relation, &next_state);
-	if (unlikely(result)) {
-		result = -ENODEV;
-		goto out;
-	}
-
-	next_perf_state = data->freq_table[next_state].index;
-	if (perf->state == next_perf_state) {
-		if (unlikely(data->resume)) {
-			pr_debug("Called after resume, resetting to P%d\n",
-				next_perf_state);
-			data->resume = 0;
-		} else {
-			pr_debug("Already at target state (P%d)\n",
-				next_perf_state);
-			goto out;
-		}
-	}
-
-	switch (data->cpu_feature) {
-	case SYSTEM_INTEL_MSR_CAPABLE:
-		cmd.type = SYSTEM_INTEL_MSR_CAPABLE;
-		cmd.addr.msr.reg = MSR_IA32_PERF_CTL;
-		cmd.val = (u32) perf->states[next_perf_state].control;
-		break;
-	case SYSTEM_IO_CAPABLE:
-		cmd.type = SYSTEM_IO_CAPABLE;
-		cmd.addr.io.port = perf->control_register.address;
-		cmd.addr.io.bit_width = perf->control_register.bit_width;
-		cmd.val = (u32) perf->states[next_perf_state].control;
-		break;
-	default:
-		result = -ENODEV;
-		goto out;
-	}
-
-	/* cpufreq holds the hotplug lock, so we are safe from here on */
-	if (policy->shared_type != CPUFREQ_SHARED_TYPE_ANY)
-		cmd.mask = policy->cpus;
-	else
-		cmd.mask = cpumask_of(policy->cpu);
-
-	freqs.old = perf->states[perf->state].core_frequency * 1000;
-	freqs.new = data->freq_table[next_state].frequency;
-	for_each_cpu(i, policy->cpus) {
-		freqs.cpu = i;
-		cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);
-	}
-
-	drv_write(&cmd);
-
-	if (acpi_pstate_strict) {
-		if (!check_freqs(cmd.mask, freqs.new, data)) {
-			pr_debug("acpi_cpufreq_target failed (%d)\n",
-				policy->cpu);
-			result = -EAGAIN;
-			goto out;
-		}
-	}
-
-	for_each_cpu(i, policy->cpus) {
-		freqs.cpu = i;
-		cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);
-	}
-	perf->state = next_perf_state;
-
-out:
-	return result;
-}
-
-static int acpi_cpufreq_verify(struct cpufreq_policy *policy)
-{
-	struct acpi_cpufreq_data *data = per_cpu(acfreq_data, policy->cpu);
-
-	pr_debug("acpi_cpufreq_verify\n");
-
-	return cpufreq_frequency_table_verify(policy, data->freq_table);
-}
-
-static unsigned long
-acpi_cpufreq_guess_freq(struct acpi_cpufreq_data *data, unsigned int cpu)
-{
-	struct acpi_processor_performance *perf = data->acpi_data;
-
-	if (cpu_khz) {
-		/* search the closest match to cpu_khz */
-		unsigned int i;
-		unsigned long freq;
-		unsigned long freqn = perf->states[0].core_frequency * 1000;
-
-		for (i = 0; i < (perf->state_count-1); i++) {
-			freq = freqn;
-			freqn = perf->states[i+1].core_frequency * 1000;
-			if ((2 * cpu_khz) > (freqn + freq)) {
-				perf->state = i;
-				return freq;
-			}
-		}
-		perf->state = perf->state_count-1;
-		return freqn;
-	} else {
-		/* assume CPU is at P0... */
-		perf->state = 0;
-		return perf->states[0].core_frequency * 1000;
-	}
-}
-
-static void free_acpi_perf_data(void)
-{
-	unsigned int i;
-
-	/* Freeing a NULL pointer is OK, and alloc_percpu zeroes. */
-	for_each_possible_cpu(i)
-		free_cpumask_var(per_cpu_ptr(acpi_perf_data, i)
-				 ->shared_cpu_map);
-	free_percpu(acpi_perf_data);
-}
-
-/*
- * acpi_cpufreq_early_init - initialize ACPI P-States library
- *
- * Initialize the ACPI P-States library (drivers/acpi/processor_perflib.c)
- * in order to determine correct frequency and voltage pairings. We can
- * do _PDC and _PSD and find out the processor dependency for the
- * actual init that will happen later...
- */
-static int __init acpi_cpufreq_early_init(void)
-{
-	unsigned int i;
-	pr_debug("acpi_cpufreq_early_init\n");
-
-	acpi_perf_data = alloc_percpu(struct acpi_processor_performance);
-	if (!acpi_perf_data) {
-		pr_debug("Memory allocation error for acpi_perf_data.\n");
-		return -ENOMEM;
-	}
-	for_each_possible_cpu(i) {
-		if (!zalloc_cpumask_var_node(
-			&per_cpu_ptr(acpi_perf_data, i)->shared_cpu_map,
-			GFP_KERNEL, cpu_to_node(i))) {
-
-			/* Freeing a NULL pointer is OK: alloc_percpu zeroes. */
-			free_acpi_perf_data();
-			return -ENOMEM;
-		}
-	}
-
-	/* Do initialization in ACPI core */
-	acpi_processor_preregister_performance(acpi_perf_data);
-	return 0;
-}
-
-#ifdef CONFIG_SMP
-/*
- * Some BIOSes do SW_ANY coordination internally, either set it up in hw
- * or do it in BIOS firmware and won't inform about it to OS. If not
- * detected, this has a side effect of making CPU run at a different speed
- * than OS intended it to run at. Detect it and handle it cleanly.
- */
-static int bios_with_sw_any_bug;
-
-static int sw_any_bug_found(const struct dmi_system_id *d)
-{
-	bios_with_sw_any_bug = 1;
-	return 0;
-}
-
-static const struct dmi_system_id sw_any_bug_dmi_table[] = {
-	{
-		.callback = sw_any_bug_found,
-		.ident = "Supermicro Server X6DLP",
-		.matches = {
-			DMI_MATCH(DMI_SYS_VENDOR, "Supermicro"),
-			DMI_MATCH(DMI_BIOS_VERSION, "080010"),
-			DMI_MATCH(DMI_PRODUCT_NAME, "X6DLP"),
-		},
-	},
-	{ }
-};
-
-static int acpi_cpufreq_blacklist(struct cpuinfo_x86 *c)
-{
-	/* Intel Xeon Processor 7100 Series Specification Update
-	 * http://www.intel.com/Assets/PDF/specupdate/314554.pdf
-	 * AL30: A Machine Check Exception (MCE) Occurring during an
-	 * Enhanced Intel SpeedStep Technology Ratio Change May Cause
-	 * Both Processor Cores to Lock Up. */
-	if (c->x86_vendor == X86_VENDOR_INTEL) {
-		if ((c->x86 == 15) &&
-		    (c->x86_model == 6) &&
-		    (c->x86_mask == 8)) {
-			printk(KERN_INFO "acpi-cpufreq: Intel(R) "
-			    "Xeon(R) 7100 Errata AL30, processors may "
-			    "lock up on frequency changes: disabling "
-			    "acpi-cpufreq.\n");
-			return -ENODEV;
-		    }
-		}
-	return 0;
-}
-#endif
-
-static int acpi_cpufreq_cpu_init(struct cpufreq_policy *policy)
-{
-	unsigned int i;
-	unsigned int valid_states = 0;
-	unsigned int cpu = policy->cpu;
-	struct acpi_cpufreq_data *data;
-	unsigned int result = 0;
-	struct cpuinfo_x86 *c = &cpu_data(policy->cpu);
-	struct acpi_processor_performance *perf;
-#ifdef CONFIG_SMP
-	static int blacklisted;
-#endif
-
-	pr_debug("acpi_cpufreq_cpu_init\n");
-
-#ifdef CONFIG_SMP
-	if (blacklisted)
-		return blacklisted;
-	blacklisted = acpi_cpufreq_blacklist(c);
-	if (blacklisted)
-		return blacklisted;
-#endif
-
-	data = kzalloc(sizeof(struct acpi_cpufreq_data), GFP_KERNEL);
-	if (!data)
-		return -ENOMEM;
-
-	data->acpi_data = per_cpu_ptr(acpi_perf_data, cpu);
-	per_cpu(acfreq_data, cpu) = data;
-
-	if (cpu_has(c, X86_FEATURE_CONSTANT_TSC))
-		acpi_cpufreq_driver.flags |= CPUFREQ_CONST_LOOPS;
-
-	result = acpi_processor_register_performance(data->acpi_data, cpu);
-	if (result)
-		goto err_free;
-
-	perf = data->acpi_data;
-	policy->shared_type = perf->shared_type;
-
-	/*
-	 * Will let policy->cpus know about dependency only when software
-	 * coordination is required.
-	 */
-	if (policy->shared_type == CPUFREQ_SHARED_TYPE_ALL ||
-	    policy->shared_type == CPUFREQ_SHARED_TYPE_ANY) {
-		cpumask_copy(policy->cpus, perf->shared_cpu_map);
-	}
-	cpumask_copy(policy->related_cpus, perf->shared_cpu_map);
-
-#ifdef CONFIG_SMP
-	dmi_check_system(sw_any_bug_dmi_table);
-	if (bios_with_sw_any_bug && cpumask_weight(policy->cpus) == 1) {
-		policy->shared_type = CPUFREQ_SHARED_TYPE_ALL;
-		cpumask_copy(policy->cpus, cpu_core_mask(cpu));
-	}
-#endif
-
-	/* capability check */
-	if (perf->state_count <= 1) {
-		pr_debug("No P-States\n");
-		result = -ENODEV;
-		goto err_unreg;
-	}
-
-	if (perf->control_register.space_id != perf->status_register.space_id) {
-		result = -ENODEV;
-		goto err_unreg;
-	}
-
-	switch (perf->control_register.space_id) {
-	case ACPI_ADR_SPACE_SYSTEM_IO:
-		pr_debug("SYSTEM IO addr space\n");
-		data->cpu_feature = SYSTEM_IO_CAPABLE;
-		break;
-	case ACPI_ADR_SPACE_FIXED_HARDWARE:
-		pr_debug("HARDWARE addr space\n");
-		if (!check_est_cpu(cpu)) {
-			result = -ENODEV;
-			goto err_unreg;
-		}
-		data->cpu_feature = SYSTEM_INTEL_MSR_CAPABLE;
-		break;
-	default:
-		pr_debug("Unknown addr space %d\n",
-			(u32) (perf->control_register.space_id));
-		result = -ENODEV;
-		goto err_unreg;
-	}
-
-	data->freq_table = kmalloc(sizeof(struct cpufreq_frequency_table) *
-		    (perf->state_count+1), GFP_KERNEL);
-	if (!data->freq_table) {
-		result = -ENOMEM;
-		goto err_unreg;
-	}
-
-	/* detect transition latency */
-	policy->cpuinfo.transition_latency = 0;
-	for (i = 0; i < perf->state_count; i++) {
-		if ((perf->states[i].transition_latency * 1000) >
-		    policy->cpuinfo.transition_latency)
-			policy->cpuinfo.transition_latency =
-			    perf->states[i].transition_latency * 1000;
-	}
-
-	/* Check for high latency (>20uS) from buggy BIOSes, like on T42 */
-	if (perf->control_register.space_id == ACPI_ADR_SPACE_FIXED_HARDWARE &&
-	    policy->cpuinfo.transition_latency > 20 * 1000) {
-		policy->cpuinfo.transition_latency = 20 * 1000;
-		printk_once(KERN_INFO
-			    "P-state transition latency capped at 20 uS\n");
-	}
-
-	/* table init */
-	for (i = 0; i < perf->state_count; i++) {
-		if (i > 0 && perf->states[i].core_frequency >=
-		    data->freq_table[valid_states-1].frequency / 1000)
-			continue;
-
-		data->freq_table[valid_states].index = i;
-		data->freq_table[valid_states].frequency =
-		    perf->states[i].core_frequency * 1000;
-		valid_states++;
-	}
-	data->freq_table[valid_states].frequency = CPUFREQ_TABLE_END;
-	perf->state = 0;
-
-	result = cpufreq_frequency_table_cpuinfo(policy, data->freq_table);
-	if (result)
-		goto err_freqfree;
-
-	if (perf->states[0].core_frequency * 1000 != policy->cpuinfo.max_freq)
-		printk(KERN_WARNING FW_WARN "P-state 0 is not max freq\n");
-
-	switch (perf->control_register.space_id) {
-	case ACPI_ADR_SPACE_SYSTEM_IO:
-		/* Current speed is unknown and not detectable by IO port */
-		policy->cur = acpi_cpufreq_guess_freq(data, policy->cpu);
-		break;
-	case ACPI_ADR_SPACE_FIXED_HARDWARE:
-		acpi_cpufreq_driver.get = get_cur_freq_on_cpu;
-		policy->cur = get_cur_freq_on_cpu(cpu);
-		break;
-	default:
-		break;
-	}
-
-	/* notify BIOS that we exist */
-	acpi_processor_notify_smm(THIS_MODULE);
-
-	/* Check for APERF/MPERF support in hardware */
-	if (cpu_has(c, X86_FEATURE_APERFMPERF))
-		acpi_cpufreq_driver.getavg = cpufreq_get_measured_perf;
-
-	pr_debug("CPU%u - ACPI performance management activated.\n", cpu);
-	for (i = 0; i < perf->state_count; i++)
-		pr_debug("     %cP%d: %d MHz, %d mW, %d uS\n",
-			(i == perf->state ? '*' : ' '), i,
-			(u32) perf->states[i].core_frequency,
-			(u32) perf->states[i].power,
-			(u32) perf->states[i].transition_latency);
-
-	cpufreq_frequency_table_get_attr(data->freq_table, policy->cpu);
-
-	/*
-	 * the first call to ->target() should result in us actually
-	 * writing something to the appropriate registers.
-	 */
-	data->resume = 1;
-
-	return result;
-
-err_freqfree:
-	kfree(data->freq_table);
-err_unreg:
-	acpi_processor_unregister_performance(perf, cpu);
-err_free:
-	kfree(data);
-	per_cpu(acfreq_data, cpu) = NULL;
-
-	return result;
-}
-
-static int acpi_cpufreq_cpu_exit(struct cpufreq_policy *policy)
-{
-	struct acpi_cpufreq_data *data = per_cpu(acfreq_data, policy->cpu);
-
-	pr_debug("acpi_cpufreq_cpu_exit\n");
-
-	if (data) {
-		cpufreq_frequency_table_put_attr(policy->cpu);
-		per_cpu(acfreq_data, policy->cpu) = NULL;
-		acpi_processor_unregister_performance(data->acpi_data,
-						      policy->cpu);
-		kfree(data->freq_table);
-		kfree(data);
-	}
-
-	return 0;
-}
-
-static int acpi_cpufreq_resume(struct cpufreq_policy *policy)
-{
-	struct acpi_cpufreq_data *data = per_cpu(acfreq_data, policy->cpu);
-
-	pr_debug("acpi_cpufreq_resume\n");
-
-	data->resume = 1;
-
-	return 0;
-}
-
-static struct freq_attr *acpi_cpufreq_attr[] = {
-	&cpufreq_freq_attr_scaling_available_freqs,
-	NULL,
-};
-
-static struct cpufreq_driver acpi_cpufreq_driver = {
-	.verify		= acpi_cpufreq_verify,
-	.target		= acpi_cpufreq_target,
-	.bios_limit	= acpi_processor_get_bios_limit,
-	.init		= acpi_cpufreq_cpu_init,
-	.exit		= acpi_cpufreq_cpu_exit,
-	.resume		= acpi_cpufreq_resume,
-	.name		= "acpi-cpufreq",
-	.owner		= THIS_MODULE,
-	.attr		= acpi_cpufreq_attr,
-};
-
-static int __init acpi_cpufreq_init(void)
-{
-	int ret;
-
-	if (acpi_disabled)
-		return 0;
-
-	pr_debug("acpi_cpufreq_init\n");
-
-	ret = acpi_cpufreq_early_init();
-	if (ret)
-		return ret;
-
-	ret = cpufreq_register_driver(&acpi_cpufreq_driver);
-	if (ret)
-		free_acpi_perf_data();
-
-	return ret;
-}
-
-static void __exit acpi_cpufreq_exit(void)
-{
-	pr_debug("acpi_cpufreq_exit\n");
-
-	cpufreq_unregister_driver(&acpi_cpufreq_driver);
-
-	free_percpu(acpi_perf_data);
-}
-
-module_param(acpi_pstate_strict, uint, 0644);
-MODULE_PARM_DESC(acpi_pstate_strict,
-	"value 0 or non-zero. non-zero -> strict ACPI checks are "
-	"performed during frequency changes.");
-
-late_initcall(acpi_cpufreq_init);
-module_exit(acpi_cpufreq_exit);
-
-MODULE_ALIAS("acpi");