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authorYi Yang <yi.y.yang@intel.com>2008-02-25 08:46:12 +0800
committerLen Brown <len.brown@intel.com>2008-03-26 00:45:26 -0400
commit8b78cf602fd3bd97c0080edd22fe8fd5d0fa7832 (patch)
treee5f8d7f74c0c1dbd03af793e0b7cb8fb1c06ccdf /drivers/cpuidle/cpuidle.c
parent996520c1fdd2948addb629be56c9febf2967e02b (diff)
downloadop-kernel-dev-8b78cf602fd3bd97c0080edd22fe8fd5d0fa7832.zip
op-kernel-dev-8b78cf602fd3bd97c0080edd22fe8fd5d0fa7832.tar.gz
cpuidle: fix cpuidle time and usage overflow
cpuidle C-state sysfs node time and usage are very easy to overflow because they are all of unsigned int type, time will overflow within about two hours, usage will take longer time to overflow, but they are increasing for ever. This patch will convert them to unsigned long long. Signed-off-by: Yi Yang <yi.y.yang@intel.com> Acked-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/cpuidle/cpuidle.c')
-rw-r--r--drivers/cpuidle/cpuidle.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c
index d73663a..d42deb3 100644
--- a/drivers/cpuidle/cpuidle.c
+++ b/drivers/cpuidle/cpuidle.c
@@ -67,7 +67,7 @@ static void cpuidle_idle_call(void)
/* enter the state and update stats */
dev->last_residency = target_state->enter(dev, target_state);
dev->last_state = target_state;
- target_state->time += dev->last_residency;
+ target_state->time += (unsigned long long)dev->last_residency;
target_state->usage++;
/* give the governor an opportunity to reflect on the outcome */
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