In function intel_idle_cpu_init() and intel_idle_cpuidle_driver_init(),
they are having the same for(;;) loop.
Here in intel_idle_cpu_init(), the dev->state_count can be assigned by
drv->state_count directly.
Signed-off-by: liu chuansheng <chuansheng....@intel.com>
---
drivers/idle/intel_idle.c | 30 ++----------------------------
1 files changed, 2 insertions(+), 28 deletions(-)
diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c
index 17c9cf9..503b401 100644
--- a/drivers/idle/intel_idle.c
+++ b/drivers/idle/intel_idle.c
@@ -599,38 +599,12 @@ static int intel_idle_cpuidle_driver_init(void)
*/
static int intel_idle_cpu_init(int cpu)
{
- int cstate;
struct cpuidle_device *dev;
+ struct cpuidle_driver *drv = &intel_idle_driver;
dev = per_cpu_ptr(intel_idle_cpuidle_devices, cpu);
- dev->state_count = 1;
-
- for (cstate = 0; cstate < CPUIDLE_STATE_MAX; ++cstate) {
- int num_substates, mwait_hint, mwait_cstate, mwait_substate;
-
- if (cpuidle_state_table[cstate].enter == NULL)
- break;
-
- if (cstate + 1 > max_cstate) {
- printk(PREFIX "max_cstate %d reached\n", max_cstate);
- break;
- }
-
- mwait_hint = flg2MWAIT(cpuidle_state_table[cstate].flags);
- mwait_cstate = MWAIT_HINT2CSTATE(mwait_hint);
- mwait_substate = MWAIT_HINT2SUBSTATE(mwait_hint);
-
- /* does the state exist in CPUID.MWAIT? */
- num_substates = (mwait_substates >> ((mwait_cstate + 1) * 4))
- & MWAIT_SUBSTATE_MASK;
-
- /* if sub-state in table is not enumerated by CPUID */
- if ((mwait_substate + 1) > num_substates)
- continue;
-
- dev->state_count += 1;
- }
+ dev->state_count = drv->state_count;
dev->cpu = cpu;
--
1.7.0.4
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