On 06/14/2012 09:49 AM, Namhyung Kim wrote:
> Hi,
>
> On Fri, 8 Jun 2012 18:02:42 +0200, Daniel Lezcano wrote:
>> We have the state index passed as parameter to the 'enter' function.
>> Most of the drivers assign their 'enter' functions several times in
>> the cpuidle_state structure, as we have the index, we can delegate
>> to the driver to handle their own callback array.
>>
>> That will have the benefit of removing multiple lines of code in the
>> different drivers.
>>
>> In order to smoothly modify the driver, the 'enter' function are in
>> the driver structure and in the cpuidle state structure. That will
>> let the time to modify the different drivers one by one.
>> So the 'cpuidle_enter' function checks if the 'enter' callback is
>> assigned in the driver structure and use it, otherwise it invokes
>> the 'enter' assigned to the cpuidle_state.
>>
>> Signed-off-by: Daniel Lezcano <daniel.lezc...@linaro.org>
>> ---
>> drivers/cpuidle/cpuidle.c | 4 +++-
>> include/linux/cpuidle.h | 1 +
>> 2 files changed, 4 insertions(+), 1 deletions(-)
>>
>> diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c
>> index d90519c..155dee7 100644
>> --- a/drivers/cpuidle/cpuidle.c
>> +++ b/drivers/cpuidle/cpuidle.c
>> @@ -46,7 +46,9 @@ static inline int cpuidle_enter(struct cpuidle_device *dev,
>> struct cpuidle_driver *drv, int index)
>> {
>> struct cpuidle_state *target_state = &drv->states[index];
>> - return target_state->enter(dev, drv, index);
>> +
>> + return drv->enter(dev, drv, index) ? drv->enter(dev, drv, index) :
>
> Do you mean:
> drv->enter ? drv->enter(dev, drv, index) :
> ?
>
> Thanks,
> Namhyung
Right :)
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