diff options
| author | Ingo Molnar <mingo@elte.hu> | 2008-08-21 13:28:24 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-08-21 13:28:24 +0200 |
| commit | 470fba7ebe60ad9185056b080b331abad24b4df9 (patch) | |
| tree | f83bc13d97adaf5dd0e0f1d6a157b890f868577f /drivers/acpi/processor_perflib.c | |
| parent | 7225e75144b9718cbbe1820d9c011c809d5773fd (diff) | |
| parent | 6a55617ed5d1aa62b850de2cf66f5ede2eef4825 (diff) | |
Merge branch 'linus' into x86/doc
Diffstat (limited to 'drivers/acpi/processor_perflib.c')
| -rw-r--r-- | drivers/acpi/processor_perflib.c | 21 |
1 files changed, 16 insertions, 5 deletions
diff --git a/drivers/acpi/processor_perflib.c b/drivers/acpi/processor_perflib.c index b4749969c6b..80e32093e97 100644 --- a/drivers/acpi/processor_perflib.c +++ b/drivers/acpi/processor_perflib.c @@ -64,7 +64,13 @@ static DEFINE_MUTEX(performance_mutex); * policy is adjusted accordingly. */ -static unsigned int ignore_ppc = 0; +/* ignore_ppc: + * -1 -> cpufreq low level drivers not initialized -> _PSS, etc. not called yet + * ignore _PPC + * 0 -> cpufreq low level drivers initialized -> consider _PPC values + * 1 -> ignore _PPC totally -> forced by user through boot param + */ +static int ignore_ppc = -1; module_param(ignore_ppc, uint, 0644); MODULE_PARM_DESC(ignore_ppc, "If the frequency of your machine gets wrongly" \ "limited by BIOS, this should help"); @@ -72,7 +78,7 @@ MODULE_PARM_DESC(ignore_ppc, "If the frequency of your machine gets wrongly" \ #define PPC_REGISTERED 1 #define PPC_IN_USE 2 -static int acpi_processor_ppc_status = 0; +static int acpi_processor_ppc_status; static int acpi_processor_ppc_notifier(struct notifier_block *nb, unsigned long event, void *data) @@ -81,13 +87,18 @@ static int acpi_processor_ppc_notifier(struct notifier_block *nb, struct acpi_processor *pr; unsigned int ppc = 0; - if (ignore_ppc) + if (event == CPUFREQ_START && ignore_ppc <= 0) { + ignore_ppc = 0; return 0; + } - mutex_lock(&performance_mutex); + if (ignore_ppc) + return 0; if (event != CPUFREQ_INCOMPATIBLE) - goto out; + return 0; + + mutex_lock(&performance_mutex); pr = per_cpu(processors, policy->cpu); if (!pr || !pr->performance) |