On 29-01-16, 23:53, Rafael J. Wysocki wrote:

From: Rafael J. Wysocki <redacted>

Introduce a mechanism by which parts of the cpufreq subsystem
("setpolicy" drivers or the core) can register callbacks to be
executed from cpufreq_update_util() which is invoked by the
scheduler's update_load_avg() on CPU utilization changes.

This allows the "setpolicy" drivers to dispense with their timers
and do all of the computations they need and frequency/voltage
adjustments in the update_load_avg() code path, among other things.

The scheduler changes were suggested by Peter Zijlstra.

Signed-off-by: Rafael J. Wysocki <redacted>
---
 drivers/cpufreq/cpufreq.c |   44 ++++++++++++++++++++++++++++++++++++++++++++
 include/linux/cpufreq.h   |    7 +++++++
 include/linux/sched.h     |    2 ++
 kernel/sched/fair.c       |   29 ++++++++++++++++++++++++++++-
 4 files changed, 81 insertions(+), 1 deletion(-)

Acked-by: Viresh Kumar <viresh.kumar@linaro.org>

-- 
viresh