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authorLen Brown <len.brown@intel.com>2008-02-07 03:12:17 -0500
committerLen Brown <len.brown@intel.com>2008-02-07 03:12:17 -0500
commit4f4ae0d42680889c62db4e1f3e6b4aa7787a7257 (patch)
tree4263a1b014b59ee8d5557da570570571c8ea0297 /drivers/acpi
parentd870ec7281d8429ab17d2e0324f4d8ca3f3de62d (diff)
parent623b78c39c4525731f852072edd742cc4fba6786 (diff)
Merge branches 'release' and 'ppc-workaround' into release
Diffstat (limited to 'drivers/acpi')
-rw-r--r--drivers/acpi/processor_perflib.c16
1 files changed, 15 insertions, 1 deletions
diff --git a/drivers/acpi/processor_perflib.c b/drivers/acpi/processor_perflib.c
index 463b0247cbc..f32010bee4d 100644
--- a/drivers/acpi/processor_perflib.c
+++ b/drivers/acpi/processor_perflib.c
@@ -60,6 +60,11 @@ static DEFINE_MUTEX(performance_mutex);
* policy is adjusted accordingly.
*/
+static unsigned int ignore_ppc = 0;
+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");
+
#define PPC_REGISTERED 1
#define PPC_IN_USE 2
@@ -72,6 +77,9 @@ static int acpi_processor_ppc_notifier(struct notifier_block *nb,
struct acpi_processor *pr;
unsigned int ppc = 0;
+ if (ignore_ppc)
+ return 0;
+
mutex_lock(&performance_mutex);
if (event != CPUFREQ_INCOMPATIBLE)
@@ -130,7 +138,13 @@ static int acpi_processor_get_platform_limit(struct acpi_processor *pr)
int acpi_processor_ppc_has_changed(struct acpi_processor *pr)
{
- int ret = acpi_processor_get_platform_limit(pr);
+ int ret;
+
+ if (ignore_ppc)
+ return 0;
+
+ ret = acpi_processor_get_platform_limit(pr);
+
if (ret < 0)
return (ret);
else