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cpuidle: fix HP nx6125 regression

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Fix for http://bugzilla.kernel.org/show_bug.cgi?id=9355

cpuidle always used to fallback to C2 if there is some bm activity while
entering C3. But, presence of C2 is not always guaranteed. Change cpuidle
algorithm to detect a safe_state to fallback in case of bm_activity and
use that state instead of C2.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Venkatesh Pallipadi 2007-11-19 21:43:22 -05:00 • committed by Len Brown
commit ddc081a195
3 changed files with 56 additions and 71 deletions
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1
include/linux/cpuidle.h
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@ -92,6 +92,7 @@ struct cpuidle_device {
struct kobject kobj;
struct completion kobj_unregister;
void *governor_data;
struct cpuidle_state *safe_state;
};
DECLARE_PER_CPU(struct cpuidle_device *, cpuidle_devices);