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| author | Ingo Molnar <mingo@elte.hu> | 2008-08-11 13:40:56 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-08-11 13:40:56 +0200 |
| commit | 251a169c69d1ff07cee7a9bb9fc4faff6b1d2ac3 (patch) | |
| tree | 3c20c3e080f276848f2ad67aadab44a5d64bfda9 /drivers/acpi/processor_perflib.c | |
| parent | 6679ce6e5f519096612b480d255d9ca97be0c2be (diff) | |
| parent | 796aadeb1b2db9b5d463946766c5bbfd7717158c (diff) | |
| download | kernel-crypto-251a169c69d1ff07cee7a9bb9fc4faff6b1d2ac3.tar.gz kernel-crypto-251a169c69d1ff07cee7a9bb9fc4faff6b1d2ac3.tar.xz kernel-crypto-251a169c69d1ff07cee7a9bb9fc4faff6b1d2ac3.zip | |
Merge branch 'linus' into sched/urgent
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..0133af49cf0 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 unsigned 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) |