Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6

* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6: (28 commits)
  ACPI: thermal: add DMI hooks to handle AOpen's broken Award BIOS
  ACPI: thermal: create "thermal.act=" to disable or override active trip point
  ACPI: thermal: create "thermal.nocrt" to disable critical actions
  ACPI: thermal: create "thermal.psv=" to override passive trip points
  ACPI: thermal: expose "thermal.tzp=" to set global polling frequency
  ACPI: thermal: create "thermal.off=1" to disable ACPI thermal support
  ACPI: thinkpad-acpi: fix sysfs paths in documentation
  ACPI: static
  ACPI EC: remove potential deadlock from EC
  ACPI: dock: Send key=value pair instead of plain value
  ACPI: bay: send envp with uevent - fix
  acpi-cpufreq: Fix some x86/x86-64 acpi-cpufreq driver issues
  ACPI: fix "Time Problems with 2.6.23-rc1-gf695baf2"
  ACPI: thinkpad-acpi: change thinkpad-acpi input default and kconfig help
  ACPI: EC: fix run-together printk lines
  ACPI: sbs: remove dead code
  ACPI: EC: acpi_ec_remove(): fix use-after-free
  ACPI: EC: Switch from boot_ec as soon as we find its desc in DSDT.
  ACPI: EC: fix build warning
  ACPI: EC: If ECDT is not found, look up EC in DSDT.
  ...

1 files changed, 15 insertions, 26 deletions

diff --git a/arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c b/arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c
index 32d04b083e38..705e13a30781 100644
--- a/arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c
+++ b/arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c
@@ -68,7 +68,8 @@ struct acpi_cpufreq_data {
 };
 
 static struct acpi_cpufreq_data *drv_data[NR_CPUS];
-static struct acpi_processor_performance *acpi_perf_data[NR_CPUS];
+/* acpi_perf_data is a pointer to percpu data. */
+static struct acpi_processor_performance *acpi_perf_data;
 
 static struct cpufreq_driver acpi_cpufreq_driver;
 
@@ -508,24 +509,14 @@ acpi_cpufreq_guess_freq(struct acpi_cpufreq_data *data, unsigned int cpu)
  * do _PDC and _PSD and find out the processor dependency for the
  * actual init that will happen later...
  */
-static int acpi_cpufreq_early_init(void)
+static int __init acpi_cpufreq_early_init(void)
 {
-        struct acpi_processor_performance *data;
-        unsigned int i, j;
-
         dprintk("acpi_cpufreq_early_init\n");
 
-        for_each_possible_cpu(i) {
-                data = kzalloc(sizeof(struct acpi_processor_performance),
-                               GFP_KERNEL);
-                if (!data) {
-                        for_each_possible_cpu(j) {
-                                kfree(acpi_perf_data[j]);
-                                acpi_perf_data[j] = NULL;
-                        }
-                        return -ENOMEM;
-                }
-                acpi_perf_data[i] = data;
+        acpi_perf_data = alloc_percpu(struct acpi_processor_performance);
+        if (!acpi_perf_data) {
+                dprintk("Memory allocation error for acpi_perf_data.\n");
+                return -ENOMEM;
         }
 
         /* Do initialization in ACPI core */
@@ -574,14 +565,11 @@ static int acpi_cpufreq_cpu_init(struct cpufreq_policy *policy)
 
         dprintk("acpi_cpufreq_cpu_init\n");
 
-        if (!acpi_perf_data[cpu])
-                return -ENODEV;
-
         data = kzalloc(sizeof(struct acpi_cpufreq_data), GFP_KERNEL);
         if (!data)
                 return -ENOMEM;
 
-        data->acpi_data = acpi_perf_data[cpu];
+        data->acpi_data = percpu_ptr(acpi_perf_data, cpu);
         drv_data[cpu] = data;
 
         if (cpu_has(c, X86_FEATURE_CONSTANT_TSC))
@@ -778,24 +766,25 @@ static struct cpufreq_driver acpi_cpufreq_driver = {
 
 static int __init acpi_cpufreq_init(void)
 {
+        int ret;
+
         dprintk("acpi_cpufreq_init\n");
 
-        acpi_cpufreq_early_init();
+        ret = acpi_cpufreq_early_init();
+        if (ret)
+                return ret;
 
         return cpufreq_register_driver(&acpi_cpufreq_driver);
 }
 
 static void __exit acpi_cpufreq_exit(void)
 {
-        unsigned int i;
         dprintk("acpi_cpufreq_exit\n");
 
         cpufreq_unregister_driver(&acpi_cpufreq_driver);
 
-        for_each_possible_cpu(i) {
-                kfree(acpi_perf_data[i]);
-                acpi_perf_data[i] = NULL;
-        }
+        free_percpu(acpi_perf_data);
+
         return;
 }