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

* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq:
  [CPUFREQ] powernow-k8: determine exact CPU frequency for HW Pstates
  [CPUFREQ] powernow-k8 cleanup msg if BIOS does not export ACPI _PSS cpufreq data
  [CPUFREQ] fix timer teardown in ondemand governor
  [CPUFREQ] fix timer teardown in conservative governor
  [CPUFREQ] remove rwsem lock from CPUFREQ_GOV_STOP call
  [CPUFREQ] powernow-k7 build fix when ACPI=n
  [CPUFREQ] add atom family to p4-clockmod
This commit is contained in:
Linus Torvalds 2009-05-26 12:13:33 -07:00
parent 564346224d ca446d0635
commit 733be82e7d
6 changed files with 39 additions and 20 deletions
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1
arch/x86/kernel/cpu/cpufreq/p4-clockmod.c
View File

@ -168,6 +168,7 @@ static unsigned int cpufreq_p4_get_frequency(struct cpuinfo_x86 *c)
case 0x0E: /* Core */
case 0x0F: /* Core Duo */
case 0x16: /* Celeron Core */
case 0x1C: /* Atom */
p4clockmod_driver.flags |= CPUFREQ_CONST_LOOPS;
return speedstep_get_frequency(SPEEDSTEP_CPU_PCORE);
case 0x0D: /* Pentium M (Dothan) */

2
arch/x86/kernel/cpu/cpufreq/powernow-k7.c
View File

@ -168,10 +168,12 @@ static int check_powernow(void)
return 1;
}
#ifdef CONFIG_X86_POWERNOW_K7_ACPI
static void invalidate_entry(unsigned int entry)
{
powernow_table[entry].frequency = CPUFREQ_ENTRY_INVALID;
}
#endif
static int get_ranges(unsigned char *pst)
{

42
arch/x86/kernel/cpu/cpufreq/powernow-k8.c
View File

@ -649,6 +649,20 @@ static void print_basics(struct powernow_k8_data *data)
data->batps);
}
static u32 freq_from_fid_did(u32 fid, u32 did)
{
u32 mhz = 0;
if (boot_cpu_data.x86 == 0x10)
mhz = (100 * (fid + 0x10)) >> did;
else if (boot_cpu_data.x86 == 0x11)
mhz = (100 * (fid + 8)) >> did;
else
BUG();
return mhz * 1000;
}
static int fill_powernow_table(struct powernow_k8_data *data,
struct pst_s *pst, u8 maxvid)
{
@ -923,8 +937,13 @@ static int fill_powernow_table_pstate(struct powernow_k8_data *data,
powernow_table[i].index = index;
powernow_table[i].frequency =
data->acpi_data.states[i].core_frequency * 1000;
/* Frequency may be rounded for these */
if (boot_cpu_data.x86 == 0x10 || boot_cpu_data.x86 == 0x11) {
powernow_table[i].frequency =
freq_from_fid_did(lo & 0x3f, (lo >> 6) & 7);
} else
powernow_table[i].frequency =
data->acpi_data.states[i].core_frequency * 1000;
}
return 0;
}
@ -1215,13 +1234,16 @@ static int powernowk8_verify(struct cpufreq_policy *pol)
return cpufreq_frequency_table_verify(pol, data->powernow_table);
}
static const char ACPI_PSS_BIOS_BUG_MSG[] =
KERN_ERR FW_BUG PFX "No compatible ACPI _PSS objects found.\n"
KERN_ERR FW_BUG PFX "Try again with latest BIOS.\n";
/* per CPU init entry point to the driver */
static int __cpuinit powernowk8_cpu_init(struct cpufreq_policy *pol)
{
struct powernow_k8_data *data;
cpumask_t oldmask;
int rc;
static int print_once;
if (!cpu_online(pol->cpu))
return -ENODEV;
@ -1244,19 +1266,7 @@ static int __cpuinit powernowk8_cpu_init(struct cpufreq_policy *pol)
* an UP version, and is deprecated by AMD.
*/
if (num_online_cpus() != 1) {
/*
* Replace this one with print_once as soon as such a
* thing gets introduced
*/
if (!print_once) {
WARN_ONCE(1, KERN_ERR FW_BUG PFX "Your BIOS "
"does not provide ACPI _PSS objects "
"in a way that Linux understands. "
"Please report this to the Linux ACPI"
" maintainers and complain to your "
"BIOS vendor.\n");
print_once++;
}
printk_once(ACPI_PSS_BIOS_BUG_MSG);
goto err_out;
}
if (pol->cpu != 0) {

4
drivers/cpufreq/cpufreq.c
View File

@ -1070,11 +1070,11 @@ static int __cpufreq_remove_dev(struct sys_device *sys_dev)
spin_unlock_irqrestore(&cpufreq_driver_lock, flags);
#endif
unlock_policy_rwsem_write(cpu);
if (cpufreq_driver->target)
__cpufreq_governor(data, CPUFREQ_GOV_STOP);
unlock_policy_rwsem_write(cpu);
kobject_put(&data->kobj);
/* we need to make sure that the underlying kobj is actually

5
drivers/cpufreq/cpufreq_conservative.c
View File

@ -91,6 +91,9 @@ static unsigned int dbs_enable; /* number of CPUs using this policy */
* (like __cpufreq_driver_target()) is being called with dbs_mutex taken, then
* cpu_hotplug lock should be taken before that. Note that cpu_hotplug lock
* is recursive for the same process. -Venki
* DEADLOCK ALERT! (2) : do_dbs_timer() must not take the dbs_mutex, because it
* would deadlock with cancel_delayed_work_sync(), which is needed for proper
* raceless workqueue teardown.
*/
static DEFINE_MUTEX(dbs_mutex);
@ -542,7 +545,7 @@ static inline void dbs_timer_init(struct cpu_dbs_info_s *dbs_info)
static inline void dbs_timer_exit(struct cpu_dbs_info_s *dbs_info)
{
dbs_info->enable = 0;
cancel_delayed_work(&dbs_info->work);
cancel_delayed_work_sync(&dbs_info->work);
}
static int cpufreq_governor_dbs(struct cpufreq_policy *policy,

5
drivers/cpufreq/cpufreq_ondemand.c
View File

@ -98,6 +98,9 @@ static unsigned int dbs_enable; /* number of CPUs using this policy */
* (like __cpufreq_driver_target()) is being called with dbs_mutex taken, then
* cpu_hotplug lock should be taken before that. Note that cpu_hotplug lock
* is recursive for the same process. -Venki
* DEADLOCK ALERT! (2) : do_dbs_timer() must not take the dbs_mutex, because it
* would deadlock with cancel_delayed_work_sync(), which is needed for proper
* raceless workqueue teardown.
*/
static DEFINE_MUTEX(dbs_mutex);
@ -562,7 +565,7 @@ static inline void dbs_timer_init(struct cpu_dbs_info_s *dbs_info)
static inline void dbs_timer_exit(struct cpu_dbs_info_s *dbs_info)
{
dbs_info->enable = 0;
cancel_delayed_work(&dbs_info->work);
cancel_delayed_work_sync(&dbs_info->work);
}
static int cpufreq_governor_dbs(struct cpufreq_policy *policy,