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Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq

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* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq:
  [CPUFREQ] Fix stale cpufreq_cpu_governor pointer
  [CPUFREQ] Resolve time unit thinko in ondemand/conservative govs
  [CPUFREQ] speedstep-ich: fix error caused by 394122ab14
  [CPUFREQ] Fix use after free on governor restore
  [CPUFREQ] acpi-cpufreq: blacklist Intel 0f68: Fix HT detection and put in notification message
  [CPUFREQ] powernow-k8: Fix test in get_transition_latency()
  [CPUFREQ] longhaul: select Longhaul version 2 for capable CPUs
This commit is contained in:
Linus Torvalds 2009-11-18 18:49:49 -08:00
commit 66b00a7c93
7 changed files with 70 additions and 32 deletions
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23
arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
View file

@ -526,16 +526,22 @@ static const struct dmi_system_id sw_any_bug_dmi_table[] = {
static int acpi_cpufreq_blacklist(struct cpuinfo_x86 *c)
{
/* http://www.intel.com/Assets/PDF/specupdate/314554.pdf
/* 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 when HT is enabled*/
* 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) && smt_capable())
(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
@ -549,13 +555,18 @@ static int acpi_cpufreq_cpu_init(struct cpufreq_policy *policy)
unsigned int result = 0;
struct cpuinfo_x86 *c = &cpu_data(policy->cpu);
struct acpi_processor_performance *perf;
#ifdef CONFIG_SMP
static int blacklisted;
#endif
dprintk("acpi_cpufreq_cpu_init\n");
#ifdef CONFIG_SMP
result = acpi_cpufreq_blacklist(c);
if (result)
return result;
if (blacklisted)
return blacklisted;
blacklisted = acpi_cpufreq_blacklist(c);
if (blacklisted)
return blacklisted;
#endif
data = kzalloc(sizeof(struct acpi_cpufreq_data), GFP_KERNEL);

2
arch/x86/kernel/cpu/cpufreq/longhaul.c
View file

@ -813,7 +813,7 @@ static int __init longhaul_cpu_init(struct cpufreq_policy *policy)
memcpy(eblcr, samuel2_eblcr, sizeof(samuel2_eblcr));
break;
case 1 ... 15:
longhaul_version = TYPE_LONGHAUL_V1;
longhaul_version = TYPE_LONGHAUL_V2;
if (c->x86_mask < 8) {
cpu_model = CPU_SAMUEL2;
cpuname = "C3 'Samuel 2' [C5B]";

2
arch/x86/kernel/cpu/cpufreq/powernow-k8.c
View file

@ -1022,7 +1022,7 @@ static int get_transition_latency(struct powernow_k8_data *data)
* set it to 1 to avoid problems in the future.
* For all others it's a BIOS bug.
*/
if (!boot_cpu_data.x86 == 0x11)
if (boot_cpu_data.x86 != 0x11)
printk(KERN_ERR FW_WARN PFX "Invalid zero transition "
"latency\n");
max_latency = 1;

19
arch/x86/kernel/cpu/cpufreq/speedstep-ich.c
View file

@ -232,28 +232,23 @@ static unsigned int speedstep_detect_chipset(void)
return 0;
}
struct get_freq_data {
unsigned int speed;
unsigned int processor;
};
static void get_freq_data(void *_data)
static void get_freq_data(void *_speed)
{
struct get_freq_data *data = _data;
unsigned int *speed = _speed;
data->speed = speedstep_get_frequency(data->processor);
*speed = speedstep_get_frequency(speedstep_processor);
}
static unsigned int speedstep_get(unsigned int cpu)
{
struct get_freq_data data = { .processor = cpu };
unsigned int speed;
/* You're supposed to ensure CPU is online. */
if (smp_call_function_single(cpu, get_freq_data, &data, 1) != 0)
if (smp_call_function_single(cpu, get_freq_data, &speed, 1) != 0)
BUG();
dprintk("detected %u kHz as current frequency\n", data.speed);
return data.speed;
dprintk("detected %u kHz as current frequency\n", speed);
return speed;
}
/**

46
drivers/cpufreq/cpufreq.c
View file

@ -41,7 +41,7 @@ static struct cpufreq_driver *cpufreq_driver;
static DEFINE_PER_CPU(struct cpufreq_policy *, cpufreq_cpu_data);
#ifdef CONFIG_HOTPLUG_CPU
/* This one keeps track of the previously set governor of a removed CPU */
static DEFINE_PER_CPU(struct cpufreq_governor *, cpufreq_cpu_governor);
static DEFINE_PER_CPU(char[CPUFREQ_NAME_LEN], cpufreq_cpu_governor);
#endif
static DEFINE_SPINLOCK(cpufreq_driver_lock);
@ -774,10 +774,12 @@ int cpufreq_add_dev_policy(unsigned int cpu, struct cpufreq_policy *policy,
#ifdef CONFIG_SMP
unsigned long flags;
unsigned int j;
#ifdef CONFIG_HOTPLUG_CPU
if (per_cpu(cpufreq_cpu_governor, cpu)) {
policy->governor = per_cpu(cpufreq_cpu_governor, cpu);
struct cpufreq_governor *gov;
gov = __find_governor(per_cpu(cpufreq_cpu_governor, cpu));
if (gov) {
policy->governor = gov;
dprintk("Restoring governor %s for cpu %d\n",
policy->governor->name, cpu);
}
@ -949,10 +951,13 @@ int cpufreq_add_dev_interface(unsigned int cpu, struct cpufreq_policy *policy,
static int cpufreq_add_dev(struct sys_device *sys_dev)
{
unsigned int cpu = sys_dev->id;
int ret = 0;
int ret = 0, found = 0;
struct cpufreq_policy *policy;
unsigned long flags;
unsigned int j;
#ifdef CONFIG_HOTPLUG_CPU
int sibling;
#endif
if (cpu_is_offline(cpu))
return 0;
@ -999,6 +1004,18 @@ static int cpufreq_add_dev(struct sys_device *sys_dev)
INIT_WORK(&policy->update, handle_update);
/* Set governor before ->init, so that driver could check it */
#ifdef CONFIG_HOTPLUG_CPU
for_each_online_cpu(sibling) {
struct cpufreq_policy *cp = per_cpu(cpufreq_cpu_data, sibling);
if (cp && cp->governor &&
(cpumask_test_cpu(cpu, cp->related_cpus))) {
policy->governor = cp->governor;
found = 1;
break;
}
}
#endif
if (!found)
policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
/* call driver. From then on the cpufreq must be able
* to accept all calls to ->verify and ->setpolicy for this CPU
@ -1111,7 +1128,8 @@ static int __cpufreq_remove_dev(struct sys_device *sys_dev)
#ifdef CONFIG_SMP
#ifdef CONFIG_HOTPLUG_CPU
per_cpu(cpufreq_cpu_governor, cpu) = data->governor;
strncpy(per_cpu(cpufreq_cpu_governor, cpu), data->governor->name,
CPUFREQ_NAME_LEN);
#endif
/* if we have other CPUs still registered, we need to unlink them,
@ -1135,7 +1153,8 @@ static int __cpufreq_remove_dev(struct sys_device *sys_dev)
continue;
dprintk("removing link for cpu %u\n", j);
#ifdef CONFIG_HOTPLUG_CPU
per_cpu(cpufreq_cpu_governor, j) = data->governor;
strncpy(per_cpu(cpufreq_cpu_governor, j),
data->governor->name, CPUFREQ_NAME_LEN);
#endif
cpu_sys_dev = get_cpu_sysdev(j);
sysfs_remove_link(&cpu_sys_dev->kobj, "cpufreq");
@ -1606,9 +1625,22 @@ EXPORT_SYMBOL_GPL(cpufreq_register_governor);
void cpufreq_unregister_governor(struct cpufreq_governor *governor)
{
#ifdef CONFIG_HOTPLUG_CPU
int cpu;
#endif
if (!governor)
return;
#ifdef CONFIG_HOTPLUG_CPU
for_each_present_cpu(cpu) {
if (cpu_online(cpu))
continue;
if (!strcmp(per_cpu(cpufreq_cpu_governor, cpu), governor->name))
strcpy(per_cpu(cpufreq_cpu_governor, cpu), "\0");
}
#endif
mutex_lock(&cpufreq_governor_mutex);
list_del(&governor->governor_list);
mutex_unlock(&cpufreq_governor_mutex);

4
drivers/cpufreq/cpufreq_conservative.c
View file

@ -116,9 +116,9 @@ static inline cputime64_t get_cpu_idle_time_jiffy(unsigned int cpu,
idle_time = cputime64_sub(cur_wall_time, busy_time);
if (wall)
*wall = cur_wall_time;
*wall = (cputime64_t)jiffies_to_usecs(cur_wall_time);
return idle_time;
return (cputime64_t)jiffies_to_usecs(idle_time);;
}
static inline cputime64_t get_cpu_idle_time(unsigned int cpu, cputime64_t *wall)

4
drivers/cpufreq/cpufreq_ondemand.c
View file

@ -133,9 +133,9 @@ static inline cputime64_t get_cpu_idle_time_jiffy(unsigned int cpu,
idle_time = cputime64_sub(cur_wall_time, busy_time);
if (wall)
*wall = cur_wall_time;
*wall = (cputime64_t)jiffies_to_usecs(cur_wall_time);
return idle_time;
return (cputime64_t)jiffies_to_usecs(idle_time);
}
static inline cputime64_t get_cpu_idle_time(unsigned int cpu, cputime64_t *wall)