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authorZhao Yakui <yakui.zhao@intel.com>2011-01-10 16:35:45 +0800
committerLen Brown <len.brown@intel.com>2011-01-10 12:35:28 -0500
commit5a344a505093dd65f82f338ffdb7208321b3630e (patch)
tree398d26e9108e54537be840e658cbe7972a810fb4 /include/acpi
parentdaef1f35ea1e2cca125eecd5f078f40b55eb9105 (diff)
downloadblackbird-op-linux-5a344a505093dd65f82f338ffdb7208321b3630e.tar.gz
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ACPI: Reevaluate whether the T-state is supported or not after cpu is online/offline
After one CPU is offlined, it is unnecessary to switch T-state for it. So it will be better that the throttling is disabled after the cpu is offline. At the same time after one cpu is online, we should check whether the T-state is supported and then set the corresponding T-state flag. Signed-off-by: Zhao Yakui <yakui.zhao@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'include/acpi')
-rw-r--r--include/acpi/processor.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/acpi/processor.h b/include/acpi/processor.h
index 1b62102fbb67..55192ac0cede 100644
--- a/include/acpi/processor.h
+++ b/include/acpi/processor.h
@@ -324,6 +324,12 @@ int acpi_processor_tstate_has_changed(struct acpi_processor *pr);
int acpi_processor_get_throttling_info(struct acpi_processor *pr);
extern int acpi_processor_set_throttling(struct acpi_processor *pr,
int state, bool force);
+/*
+ * Reevaluate whether the T-state is invalid after one cpu is
+ * onlined/offlined. In such case the flags.throttling will be updated.
+ */
+extern void acpi_processor_reevaluate_tstate(struct acpi_processor *pr,
+ unsigned long action);
extern const struct file_operations acpi_processor_throttling_fops;
extern void acpi_processor_throttling_init(void);
/* in processor_idle.c */
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