On 27 September 2014 15:44, Mike Turquette <[email protected]> wrote: > I have another use case for exposing driver flags and I have created a > similar patch to this locally in my git tree. > > Basically some cpufreq drivers may block or sleep during their > .set_target callback, and others will not. E.g. the former case is the > common pattern to use the clock framework and the regulator framework, > both of which hold mutexes and may have slow operations and the latter > case is more like the Intel P-state driver with just some register > writes. > > For the energy-aware scheduling work it is desirable to know if the > cpufreq driver can do a "fast" transition of it might sleep, since that > affects whether we adjust the cpu frequency from the scheduler context > of whether need to put new work on the workqueue (e.g. waking up a > kthread dedicated to calling .set_target).
I wasn't against exposing the flags but using the same variable to store driver specific data. -- To unsubscribe from this list: send the line "unsubscribe linux-arm-msm" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
